标签归档 西安品茶上课

Time and Space Technology: Yang Yaohua plans to reduce his holdings by no more than 2.98 million shares.

The chairman of Time and Space Technology is Gong Gonghai, male, 50 years old, with a bachelor’s degree background; The general manager is Jiang Huapeng, male, 47 years old, with a junior college education background.

As of press time, the market value of Time and Space Technology is 1.7 billion yuan.

1. In the past 30 days, no organization has conducted research on space-time technology;
2. Time and Space Technology last announced its reduction on July 15, 2023, and fell by 0.48% on the second trading day. Time and Space Technology issued two reduction announcements in the past year.

(Reporter Cai Ding)

LinkedIn develops built-in game functions, and it is reported that employees’ scores will affect the company’s ranking.

IT House reported on March 18th that LinkedIn, a social platform for the workplace, was developing a built-in game function. Nima Owji, an application researcher, posted a series of screenshots on X, showing some games being developed by LinkedIn, and said that employees’ scores would affect their company’s ranking in the game.

LinkedIn has confirmed this plan to foreign media TechCrunch. The official said: "We are adding puzzle-based games to the LinkedIn experience to release some fun, deepen relationships and hopefully stimulate opportunities for dialogue."

The report also said that the games currently being developed by LinkedIn include Queens, Inference and Crossclimb. It is not clear when the game function will go online and whether it will be available to free users.

LinkedIn revealed that its advanced subscription plan in 2023 generated revenue of $1.7 billion (Note of IT House: currently about RMB 12.24 billion). These plans start at $39.99 per month (currently about RMB 288).

Champions League-Cristiano Ronaldo helped the Red Devils win 5 consecutive victories, Manchester United 2-1 Sporting Lisbon.

  


  Sohu Sports News On November 28th, Beijing time, Group F of the Champions League ended the fifth round of competition. Manchester United beat Sporting Lisbon 2-1 in stoppage time at home at Old Trafford, while Rome beat Dynamo Kiev 4-1 away to secure promotion to the top 16 in advance. Sporting Lisbon won the third place in the group and can continue to participate in the UEFA Cup. ——


  Manchester United 2-1 Sporting Lisbon


  As the only team in the top 32 that scored 12 points in the first four rounds, Manchester United can ensure the first place in the group as long as it wins, and Sporting Lisbon can’t afford to lose this game if it wants to retain its promotion hope.


  However, judging from the past records, Sporting Lisbon’s trip to England was run out of luck. Manchester United’s previous 8 home games against Portugal were unbeaten with 7 wins and 1 draw, and nearly 32 home games in the Champions League were only lost to AC Milan. On the other hand, Sporting Lisbon, nearly 11 Champions League away games have only a poor record of winning.


  In this game, Ferguson was not affected by the unexpected loss to Bolton last weekend, and continued to rotate the starting lineup. O ‘Shea, Fletcher and Kuszczak were all allowed to start, Vidic recovered from his back injury and returned to the starting line instead of Pique, while C- Ronaldo and Nani played against their old club in the frontcourt respectively. Sporting Lisbon, Ledesson injured his right thigh at the weekend, but the injury was not serious. Patricio, 19, still started in the Champions League for the first time instead of stojkovic, who suffered a hip injury.


  At the beginning of the first half, although Sporting Lisbon had a slight advantage in controlling the ball, it was slightly stronger than Manchester United in terms of offensive sharpness. In the second minute, Anderson obliquely passed C- Ronaldo, and the Portuguese international scored after running 50 meters with the ball. Unfortunately, Saha was a little slow. Subsequently, Nani got two chances in the left rib, but they failed to form a real threat. In the 12th minute, Motinho turned to his right rib 24 meters away, and his right foot slanted the low ball and it would miss. Two minutes later, C- Ronaldo received Carrick’s oblique cross from the right side of the frontcourt and then shot low, which also missed the long post.


  In the 19th minute, O ‘Shea made a cross on the right, C- Ronaldo made a heel pass, and Saha inserted an oblique shot and still missed the target.In the 21st minute, Veloso distributed the ball to the right. Abel caught the ball and suddenly volleyed his right foot near the sideline. Kuszchak, who was unresponsive, made a save, but the ball flew into the net.In the 26th minute, Ledesson once again sent the ball to Manchester United’s net, but the Brazilian striker’s offside goal was invalidated. Three minutes later, Bohr increased the front of the restricted area and turned around to shoot, and the angle was slightly confiscated by Kuszchak. Since then, although the scene is lively, neither side has created a really threatening shooting opportunity. In the first half of the game, Manchester United fell 0-1 behind Sporting Lisbon and entered the halftime break.


  At the beginning of the second half, Ferguson sent Ryan Giggs and Carlos Tevez out. Only 25 seconds after the opening, Tevez successfully broke the ball on the right side of the frontcourt, and Hade had no choice but to put down the shovel and sweep down the Argentine beast and was given a yellow card warning. In the 50th minute, C- Ronaldo took a free kick from Giggs, grabbed a header, and was deflected. Seven minutes later, C- Ronaldo pushed horizontally, and Saha adjusted when he could kick. As a result, the ball was destroyed before kicking.


  In the 59th minute, Ryan Giggs kicked off the right corner, and Nemanja Vidic jumped high and tossed his head to attack the top of the goal.In the 61st minute, O ‘Shea’s cross on the right side was slightly stronger, but Evras quickly inserted the ball and successfully intercepted it. After the cross ball was blocked, it bounced in front of C- Ronaldo, and the Portuguese international hit the door with his right foot. After the ball hit Harder, it touched Tevez’s foot 6 meters in front of the door and changed lines to enter the goal.In the 64th minute, Veloso’s shot on the edge of the restricted area was slightly higher than the lintel. Four minutes later, after receiving Tevez’s cross, C- Ronaldo’s low shot was blocked by Patricio with his foot, and Anderson shot wide 35 meters away. In the 74th minute, Tevez made a long pass from the right, and C- Ronaldo leaned forward and headed the ball from a small angle.


  In the 76th minute, C- Ronaldo hit the door with his left foot and slid from the front door to the bottom line. Three minutes later, Anderson picked the ball, and Hargreaves, who had just come off the bench for less than one minute, plugged in and shot it and was blocked by Patricio with his foot. In the 80th minute, C- Ronaldo failed to get a yellow card because he was fouled. Two minutes later, Evras was also given a yellow card warning for diving in the restricted area.In the 92nd minute, Anderson was violated by Ledesson to create a free kick. C- Ronaldo took a free kick 26 meters away from the left rib and shot his right foot directly to the right side of the goal to complete the reversal, which made C- Ronaldo score 11 goals in his personal season and continue to sit side by side with Ibrahimovic at the top of the Champions League scorer list with 5 goals.In the end, Manchester United defeated Sporting Lisbon 2-1 at home, continued to maintain the record of winning the Champions League this season, and expanded the winning streak at home to 9 games, thus locking the top spot in the group one round ahead of schedule. -This year’s Golden Globe Award will be announced on December 2nd. Do you think C- Ronaldo is a suitable candidate for the Golden Globe Award?


  Manchester United (4-3-3): 29-Kuszczak /3- Evras, 5- Ferdinand, 15- Vidic, 22- O ‘Shea /16- Carrick, 24- Fletcher (46’11- Giggs), 8- Anderson /17- Nani (46’).


  Sporting Lisbon (4-4-2); 1- Patricio /3- Harder, 4- Polga, 13- tonel, 78- Abel /7- ismailov (81’25- Pereirinha), 24- Veloso, 28- Motinho, 30- Romanori (67′ 10- Vukcevic) /9- Purovic (81


  Dynamo Kiev 1-4 Rome


  In the 4th minute, panucci made an oblique pass near the right touchline. Vucinic’s shot at the front point of 7 meters didn’t kick the ball, but shook Rybka, and the ball flew directly into the far corner of the goal. In the 32nd minute, Giuly scored the ball and went straight into the penalty area. Facing Rybka, Giuly calmly pushed the ball to the right and passed the 20-year-old Ukrainian young goalkeeper to expand the lead, which was also the 20th goal scored by the French in Europe.


  In the 36th minute, the Roma midfielder launched a quick counterattack after breaking the ball. The ball was distributed to the left from Jiuli Middle Road, and Vucinic stopped the ball in a proper position. After going straight into the restricted area, he pushed the arc ball 14 meters from the left and hit it in the far corner. In the 63rd minute, Shatzkikh, who came off the bench, made a cross on the outside instep of his right foot at the front of the left rib restricted area, and I- bangura pulled back a point from the right corner of the goal with a 16-meter push from the middle road. In the 78th minute, after Vucinic cooperated with Tonetto on the left, he scored twice with his right foot at 17 meters to seal the victory. In the end, Rome beat Dynamo Kiev 4-1 away and advanced to the top 16 in advance; Kiev, on the other hand, has not won in nearly 12 Champions League matches, with 2 draws and 10 losses. (sandwich)


  Rome (4- 5-1): 32-Doni /2- panucci, 4-Juan, 21- Ferrari, 22- Tonetto /16- Derossi (61’29- Barruso), 7- Pizarro, 11- Taddei (46’18- esposito), 14-.

Editor: Lu Fangfei

Sweep Meizhou away with one foot in the Super League? The last round of Nantong Zhiyun still needs to go all out

Special correspondent Jiang Hai reports On October 29th, the penultimate round of the Super League in 2023 started at the same time. Nantong Zhiyun, who ranked second in the standings, challenged Meizhou Hakka away. In the end, the team scored 3 points with a score of 4-0. With the last round left in the league, the points rose to the penultimate third, beating Dalian people, and the final round of the game would be successful in relegation.

After losing to Shanghai Shenhua 0-1 at home in the last round of league tournament, the relegation situation of Nantong Zhiyun was once in jeopardy. In the last two rounds, they will play against Meizhou Hakka and Tianjin Jinmen Tiger away from home. Even if they all win, they also need to look at the face of their relegation opponent Dalian. Moreover, in terms of mutual record with Dalian people, Nantong Zhiyun is the main loser and does not have an advantage. Therefore, as long as Dalian people all win in the last two games, Nantong Zhiyun will get whatever results in the last two rounds.

Therefore, the game against Meizhou Hakka is a "can’t afford to lose" final for Nantong Zhiyun, and the team has suffered five consecutive defeats before, and it is urgent to get points to improve the morale of the team. Fortunately, Nantong Zhiyun started very well, and Jiang Zilei broke the deadlock in the 12th minute of the game. In the following game, Nantong Zhiyun played smoothly: in the 64th minute, Castillo made meritorious deeds, 2-0, expanding the lead; In the 89th minute, Morelato scored a goal, 3-0; In the second minute of stoppage time, Zheng Haogan scored a single goal after breaking the ball and sealed the victory 4-0.

While winning this game, Nantong Zhiyun also gave Meizhou Hakka the first defeat in the last five rounds. At the same time, Nantong Zhiyun also took the fate of relegation into his own hands. Generally speaking, the performance of Nantong Zhiyun team in the Super League this season is not ideal. They need to reflect on their own problems and find a solution to them.

Before the current round against Meizhou Hakka, Nantong Zhiyun scored 19 points with Dalian People’s Team, but due to the disadvantage of winning and losing, Nantong Zhiyun was in the relegation zone. At the same time of this game against Meizhou Hakka, Dalian people challenged Qingdao Manatee away. Compared with Nantong Zhiyun’s away victory, Dalian people scored two goals in a row when they were 0-2 behind, but they failed to beat their opponents in the away game and only got 1 point. However, Dalian people’s fighting capacity in this game was admirable. However, they lost their relegation advantage to Nantong Zhiyun without getting 3 points from Manatee. After the end of this round of competition, the championship suspense of the Super League has been revealed, leaving only one suspense of relegation. In addition to the relegated Shenzhen team, another relegation team will be created between Nantong Zhiyun and Dalian people. The away win of this game also allows Nantong Zhiyun to temporarily occupy the relegation advantage.

In the final round, Nantong Zhiyun played against Tianjin Jinmen Tiger at home, while Dalian people played against Shanghai Harbour, which has won the championship at home. Holding a 2-point lead, for Nantong Zhiyun, the last game must be won. If you can get 3 points, you don’t have to look at other people’s faces, and you can successfully avoid relegation at home. However, if you draw or lose, you need to look at the result of the game between Dalian people and Shanghai Harbour. At present, it can only be said that Nantong Zhiyun has left one foot in the Super League next year, but the team still cannot relax its vigilance until the end of the league.

After the game, David, coach of Nantong Zhiyun team, said: "As we expected, today is a difficult game. The opponents will not let you win the game easily. They played with the strongest lineup. We also carried out the counter-attack tactics arranged before the game well, and it is also very important that we didn’t concede a goal today. The opponent is a very strong team, so these three points are also very valuable to us. Our players have been fighting like warriors. In the last game, we need to fulfill our promises to our fans, win the game, and achieve the goal of relegation. For fans, it is too little to say thank you, and they are supporting us both at home and away. "

As far as Dalian people are concerned, the team has been pushed to the edge of the cliff. Even if the team beats Shanghai Harbour at home in the last round, it may not be able to avoid relegation. While Nantong Zhiyun has the initiative, he still has to go all out in the face of Tianjin Jinmen Tiger, who has nothing to ask for. As the "only seedling" of Jiangsu football in the Super League, Nantong Zhiyun’s game this season has gone through a rough time. Now it can regain its relegation advantage. The team should go all out to draw a satisfactory end to this season with a home victory, and at the same time let Jiangsu football remain in the top leagues in China.

Kobe Bryant’s former full-time pilot: the helicopter crashed in good condition or because of the weather

  The picture shows the crash site.

  Overseas Network January 27th Local time January 26th, NBA star Kobe Bryant was killed in a helicopter crash in California, USA, at the age of 41. Kurt Deetz, a former full-time pilot of Kobe Bryant, said that the crashed helicopter was like a "luxury car" with a good safety record, and the crash was more likely caused by bad weather.

  According to the Los Angeles Times, Deeds is a former pilot of "IEX Express Helicopters" and worked as a full-time pilot for Kobe Bryant from 2014 to 2016. He introduced that Kobe will take Sikorsky S-76B helicopter nine times out of ten trips. When Kobe retired in 2016, he arrived in downtown Los Angeles by the same helicopter.

  Dietz said that Kobe prefers Sikorsky S-76B and compares this helicopter to a "limousine". Dietz recalled: "Every time I flew with Kobe, he was always quiet, and he would say hello and say ‘ Hi ’ And then give a thumbs up, or say nothing, he is very professional. "

  According to the published flight records, this Sikorsky S-76B helicopter was built in 1991. Dietz flew on this plane for more than 1,000 hours, and called it "excellent". Sikorsky S-76B helicopter is also loved by celebrities because of its comfort and safety.

  The crashed helicopter belongs to "IEX Helicopter Company", and Dietz said that the company strictly abides by the "complete maintenance plan" for helicopter maintenance. Dietz guessed that the crash was more likely caused by bad weather than by engine or mechanical problems.

  Dietz said: "The helicopter seems to hit the ground at a very fast speed, with a speed of about 160 miles per hour (about 257 kilometers per hour). After flying for 40 minutes, there are about 800 pounds of fuel on the helicopter, which is enough to cause a fire."

  At about 10 am local time on January 26th, a helicopter crash occurred in California, USA. Kobe Bryant, a famous NBA star, died in this plane crash at the age of 41.

  At the time of the accident, Kobe was taking a helicopter to Mamba College for basketball training, accompanied by his 13-year-old daughter Jaina Maria. When the plane was flying over Calabaca, it suddenly crashed on a hillside 30 miles northwest of Los Angeles and caught fire for "unknown reasons". The Los Angeles County Police Department told reporters that when the helicopter crashed, there were 9 people on board, including 8 passengers and 1 pilot, all of whom were killed.

  Kobe Bryant was born in Philadelphia, Pennsylvania, USA on August 23rd, 1978. He was selected by Charlotte Hornets in the NBA draft in 1996, and then traded to Los Angeles Lakers as a shooting guard and a small forward. As an adult, Kobe spent most of his life in the coastal area of Orange County in southern Los Angeles. Due to the poor traffic conditions in Southern California, he often takes part in training and competitions by helicopter to save time.

  During his 20-year career, he led the Lakers to win the NBA championship five times and was selected to the NBA All-Star Team 18 times, becoming the third leading scorer in NBA history. On April 14th, 2016, Kobe Bryant announced his retirement after completing the last regular-season game of his career. (Overseas network Zhu Huiyue)

On March 3rd, the 11th World Wildlife Day entered the Wildlife Park.

This article was transferred from tianshan net;
March 3rd, 2024 is the 11th World Wildlife Day. Xiao Bian of tianshan net Popular Science Studio walked into Karamay and visited Karamay, a "wildlife paradise" in early spring through the lens.

01:32
Karamaili, located in the east of Junggar Basin, is the native place of wild wild horse Platts, the largest wild habitat and breeding ground in the world. In addition to the rare wild horses of Platts, which are rarer than giant pandas, there are also rare and endangered wild animals such as Mongolian wild donkey, goose throat antelope, argali, lynx, red fox and sand fox, which is a concentrated distribution area of ungulate wild animals in low-altitude desert in China. It has many types of desert vegetation, such as Haloxylon ammodendron and Calligonum mongolicum, and is a typical representative of desert ecosystem in temperate arid regions of the world. There is also a unique natural landscape of clastic rock landform represented by Yadan landform in arid areas.
It is understood that there are 392 species of wild plants and 260 species of wild animals in Karamay.

05:41
In April, 2022, the application for the creation of Kalamaili National Park was approved. The creation area consists of three protected areas: Kalamaili Mountain ungulate wildlife nature reserve, Qitai Silicified Wood-Dinosaur National Geopark in Xinjiang and Qitai Silicified Wood desert park in Xinjiang.
Today, Karamay has been upgraded from the traditional "human eye view" to the "celestial eye view", and it has achieved "global patrol and adjustment at any time" from "local patrol". Heavy-duty pan/tilt, infrared camera, unmanned aerial vehicle and satellite communication make it full of scientific and technological sense.
Planning: Ding Tao Yang Tao Ding Wen
Photography: Niu Tai
Text/clip: Ding Wen
Tianshan net popularization of science studio Aisen film
Joint production
Reporting/feedback

Why run?

This work was recommended to me by my good friend. At that time, I signed up for a relay race together, and he mentioned it to me. However, after watching three episodes, I didn’t have much interest. It seemed to be just an ordinary straightforward account, so I shelved it.

Later, before the relay race, he mentioned this work to me again. At the end of the relay race, I once again recalled and thought about my relay race (I won the fifth place in the team, barely ranked, and the top six had certificates)

So, I started from episode 4 and kept watching; At the same time, I started running, aiming at 5 km PB.

Watch the fan and run, simultaneously.

I thought that running was just an ordinary sport. After these dozens of days, I have experienced a lot of thinking, and I have improved a lot in psychology, physique and all aspects. Of course, any sport is not simple, and it is extremely worthy of respect. Let’s talk about several animation scenes that I feel deeply:

Running is a wonderful thing to imagine. Even so, we have to face all kinds of affairs in life, even some annoying and frustrating things. These will affect our mood and our willingness to run.

Naked king

What Grey Er said made me think for a long time. I have always liked running, and I am not slow. However, in the first 11 months of 2021, I only ran 92.86km. This is really too little, the daily average is only 0.28km, too little. Maybe I will blame the study task, etc. Many things are meaningless. I just want to ask myself, why not go running? Most of these running distances are also about people to run. Why don’t I run myself?

On the other hand, my running amount in the last 30 days is 90.05km, which is 11 times of the previous one. And I consciously control the amount of running, and I have run once every 1~2 days. I don’t know that this period of time is full of final exams, and it is unheard of to practice running in the final week.

To sum up, everyone’s situation is different, but for me:It’s good to run with reality.

This training form, I am very concerned about:

Training table

Perhaps, of course, everyone should have everyone’s personal tailor training, but it is not possible for ordinary players. In the animation, the track and field teams and high school teams of other universities, every ordinary person can only practice with the big troops. In my experience in junior high school and senior high school, there has never been a scene of special guidance.

From this, it can be seen more.Grey’s good intentionsIt is reasonable for everyone to improve their grades. (I have to mention that everyone’s meals are also handled by the gray two! )

Many people will be confused. Why do they like running?

In fact, if you don’t like it, you don’t like it, but it’s hard to give an exact reason for liking it. You may say "running is good for your health" and "running is very comfortable", but this is not very convincing and does not touch the essence. So in this regard, I can only give the reason of "simply liking", although it seems to be unknown so. In the animation, the prodigy said this:

The words of a prodigy

So, during this time, so have I. What is like? Or, what is love?

Like is serious.

When I carefully run every step, warm-up and stretching, related equipment, water supply, energy supply, pace frequency, stride length, breathing, posture, pay attention to every detail, be serious and unfocused, so as to enjoy it more and like it more.

Going to the kitchen is ecstatic!
Grey said to Ah Zou

This reminds me of the sentence "Go slowly and enjoy!"

Although running is running, it is not just running.

JOJO terrier

Is the prince a success? Not necessarily, depending on the specific definition of "success" here.
Is the prince a hard worker? There is no doubt that it is.

prince

What is the prince trying to tell us? His achievements are unremarkable, but we see the significance of hard work from him. Without hard work, he can’t stand on the track in Hakone, and he can’t experience twists and turns, so beautiful as he wants.

KING’s monologue, in my opinion, is the most perfect monologue in this work, which perfectly interprets the spirit of this work.

KING’s monologue

This is the meaning of Hakone’s biography in this work. Why are 12 players allowed, but Grey II only found 10 players? Grey II tells us what the close relationship between individuals and groups should be.

Are you ready to press the answer key?

Successful people, without exception, are working hard. -the prince
It is arrogant to think that you can do everything by hard work. -Grey II

Keiji

Hard work is not a guarantee of good grades. The real experiences of Hirosuke and Fujioka tell us this.

There is no need to answer.

There’s a reason for playing billiards too badly. The exclusive cheats teach you how to clear the table with one shot.

"Source: Institute of Physics, Chinese Academy of Sciences"
Whether table tennis is good or not depends on fate, and some people believe in "making great efforts to make miracles".
Some people think that through constant practice, they can naturally master those wonderful hitting angles and achieve perfection.
Do you know how hard I work?
But in fact, the way of hitting the ball and the trajectory of the table tennis game contain rich knowledge of mathematics and physics. This knowledge controls the trend of table tennis, and you can also become a master of table tennis by mastering these theoretical knowledge.
Essential knowledge 1: sine theorem
If we regard point A as a white ball, point B as a target ball and point C as a hole, how can we achieve the goal?
At this time, understanding the sine theorem can help you find the best goal plan. The formula of sine theorem is as follows:
In this formula, r is the radius of the circumscribed circle of the plane triangle ABC.
Essential knowledge 2: cosine theorem
Similarly, in any triangle in the above picture, the rational use of cosine theorem formula can also help you find the best scheme to hit the ball B into the hole C with the white ball A.
The cosine theorem is as follows:
Essential knowledge 3: reflection theorem
As shown in the above figure, red is the initial motion line of the ball, blue is the reflection line of the ball, the gray rectangle can be regarded as the edge library of the table, and the purple midline is the normal vector in the middle of the interface, so the following hypothetical figure can be obtained:
Through this reflection pattern hypothesis, we can better imagine the trajectory of the ball after hitting the library.
Essential knowledge 4: collision principle
① Frontal collision (completely elastic)
After the collision of two objects, the kinetic energy and momentum of the system are conserved, and there is no additional energy conversion.
The conclusion is:When the two balls have the same mass, the speed of the two balls will be exchanged after a completely elastic ideal frontal collision.
② frontal collision (totally inelastic)
Inelastic collision means that a part of the kinetic energy of objects is converted into internal energy before and after collision, while completely inelastic refers to converting kinetic energy into internal energy as much as possible, that is, two objects move at the same speed together.
③ Actual collision
The actual collision is a mixture of completely elastic and completely inelastic collision. If the velocity of the two balls is defined as V1,1, V2, 1 after a complete elastic collision; Before the collision, the speed of the two balls was V1,0, V2,0, and the recovery coefficient of the resin material used in billiards was k (the recovery coefficient of good materials was k≈1), so there were:
When k=0, it is completely inelastic collision, and when k=1, it is completely elastic collision. For an actual collision problem, the transformation of velocity and internal energy after two balls collide can be expressed by k, which is specifically expressed as:
In addition, it includes image vector decomposition; General situation and special situation of two-dimensional collision; Rigid body dynamics; Rotational inertia and rotational energy: rotational inertia of homogeneous sphere, law of rotation; Friction: a series of necessary knowledge points such as static friction, sliding friction and rolling friction …
Aiming technique
After a long and boring basic theoretical knowledge, you must be a patient and persevering table tennis enthusiast, and you also have the theoretical basis for learning more skills. Then if you want to master the secret of how to hit the ball in actual combat, aiming technology is the main content to be learned next.
I believe everyone understands a truth. When we observe an object, the closer it is to us, the bigger it will look. If it is farther away from us, it will look smaller. In fact, the actual size of the object has not changed. This is the so-called visual effect.
The visual effect will affect our judgment on the size of the cue ball, thus affecting our aiming angle.
So when we aim at close range, we will subjectively think that the ball looks big, while it looks small at a distance.
Then there are two problems that need to be discussed: first, the influence of the cue ball getting bigger on the thickness of the shot; Secondly, how much will the distance between the center of the cue ball and the goal point and the center of the target ball make the cue ball look bigger?
First of all, we will explain the impact of hitting thickness after the cue ball becomes bigger as shown in the above figure, which shows the maximum overlapping thickness of the two balls, the big gray circle is the size of the cue ball after it becomes bigger, the radius is, the small circle is the original size of the cue ball, the red ball is the size of the target ball, the radius is, and the maximum overlapping radius of the small gray circle and the red circle is, so there are:
The second question has the following explanation about the distance between the cue ball and each ball center. As shown in the above figure, D represents the distance between the cue ball and the goal point, and the distance D0 between the cue ball center and the target ball center, and the angles α and β, then the relationship between the variables can be obtained as follows:
Walking technique
Finally, let’s talk about the topic that everyone is most interested in, which is also the advanced skill of table tennis game-walking technique. Walking technology is to control the motion track of the cue ball by hitting different positions of the cue ball.
0:Center pole/fixed pole, ideally, the cue ball will only slide without any rotation.
1:High/heel/topspin, cue ball rotates forward, which has following effect after collision.
2:Low shot/shrinking shot/backspin ball, cue ball rotates backward and travels backward after collision.
3&4:Side plugs, 3 and 4 represent the left and right respectively, and the cue ball rotates to the right and left respectively after the shot, which can change the rebound angle of the cue ball after hitting the library.
5:Left plug, the effect is the superposition of high pole and left plug.
6:Upper right plug, the effect is the superposition of high pole and right plug.
7:Left lower plug, the effect is the superposition of low rod and left plug.
8:Lower right plug, the effect is the superposition of low rod and right plug.
A:Stearns followed, and the distance followed after the cue ball hit the target was shorter than that followed by the high pole.
C:Stern retreats, and the distance that the cue ball retreats after hitting the target is shorter than that of the low pole.
B&D:Stensey, the cue ball changes direction after hitting the target.
By hitting the above position of the cue ball, the corresponding cue ball movement effect can be achieved.
After learning so many high-end knowledge and formulas, let’s get rid of the old concept of "making great efforts to make miracles". Many people always keep the same strength to hit the ball, which is not desirable. The strength of hitting the ball should be changed at any time with different situations. This requires long-term practice to accurately grasp the strength of the shot that should be adopted at different angles.
The above is the explanation of the formula and technology related to this table tennis game. Dear table tennis lovers, remember the formula and practice hard. "Clear the table with one shot" is not a dream!
END
Audit: Zhu Guangsi, member of Beijing Popular Science Writers Association.
Reprinted content only represents the author’s point of view
Does not represent the position of Institute of Physics, Chinese Academy of Sciences.
Source:Tadpole staff
Editor: Garrett
Reporting/feedback

Tips: Go to work tomorrow! Don’t panic, there are still these holidays in 2024.

These days of vacation
Did everyone have a good time? Did you enjoy your meal?
Are you tired of visiting relatives and friends?
Xiaobian is coming to tell you a message:
I will go to work tomorrow!
The Spring Festival holiday is coming to an end.
If there’s something you want to do, you haven’t done it yet
Just hurry!
Stay at home leisurely for half a day
Ask your parents to watch a movie
……
Then adjust the state ~
Don’t stay up late and have fun!
Also, have some light home cooking!
It’s time to have a rest.
It’s almost time for vacation.
Xiaobian sent two important reminders ↓↓↓↓
Reminder 1: I have to go to work this Sunday!
The last day of the holiday is New Year’s Day! I have to go to work on February 18 (Sunday) on New Year’s Day! Going to work! Adjust the alarm clock quickly!
Reminder 2: Holiday overtime pay should be sufficient.
Spring festival holiday
Many people will choose
Stay at your post
● February 10th to 12th is a statutory holiday, and enterprises have to pay three times the daily wage for arranging workers to work;
● Work will be arranged from February 13th to 17th, and enterprises with standard working hours can choose to give workers compensatory time off or pay double daily wages.
But don’t be too sad.
After the Spring Festival holiday
There is still a big wave of holidays this year!
Collect the 2024 holiday raiders.
Tomb-Sweeping Day: We have a holiday from April 4th to 6th, lasting for 3 days. Go to work on Sunday, April 7.
Labor Day: May 1st to 5th, with 5 days’ holiday. Go to work on Sunday, April 28th and Saturday, May 11th.
Dragon Boat Festival: It is a holiday on June 10th, and even closed on weekends.
Mid-Autumn Festival: Take a holiday from September 15th to 17th for 3 days. Go to work on Saturday, September 14th.
National Day: 7 days’ holiday from October 1st to 7th. Work on September 29th (Sunday) and October 12th (Saturday).
Hurry up, everyone
Finally adjust and adjust
Tomorrow will usher in a big start.
Source: yanzhao metropolis daily.
Reporting/feedback

Cosmetics sold 207.1 billion yuan in the first half of the year, and the beauty track ushered in a big outbreak.

In the first half of the year, cosmetics sold 207.1 billion yuan.

Since the beginning of this year, the cosmetics market has shown great vitality and potential.

On July 17th, the National Bureau of Statistics released data showing that in the first half of 2023, the total retail sales of social consumer goods was 22,758.8 billion yuan, up 8.2% year-on-year, of which the retail sales of cosmetics products was 207.1 billion yuan, up 8.6% year-on-year. In the first half of this year, the total retail sales of cosmetics exceeded 200 billion yuan for the first time, the highest level in history.

(Source: National Bureau of Statistics)

Among them, domestic cosmetics are not only popular in China, but also popular in overseas markets. According to the customs export data, the export of cosmetics rose steadily in the first five months of this year, the export volume and amount of beauty cosmetics and toiletries maintained a certain increase, and the demand of foreign consumers for domestic cosmetics has been greatly improved.

(Source: official website, General Administration of Customs of the People’s Republic of China)

In addition to the growth of the overall market, the performance released by some beauty listed companies has also increased, turning losses into profits.

Recently, the beauty leader Polaiya Cosmetics Co., Ltd. released the semi-annual performance forecast for 2023. It is estimated that the net profit of returning home in the first half of this year will be 460 million yuan to 490 million yuan, which will increase by 163 million yuan to 193 million yuan compared with the same period of last year, increasing by 55% to 65% year-on-year. It is worth mentioning that in the first quarter of this year, the growth rate of revenue and net profit of Polaiya was close to 30% year-on-year.

(Source: Polaiya official website)

Shanghai jahwa United Co., Ltd. predicts a net profit of 285 million yuan to 315 million yuan in the first half of the year, an increase of 81% to 100%. According to the company, in the first half of 2023, through the recovery growth of domestic business, the company digested the pressure of overseas business and achieved good business results.

Market participants said that according to the current growth trend, the cosmetics market will once again break through the 400 billion mark at the end of the year. All kinds of situations show that the beauty industry is recovering strongly, and China’s cosmetics market has shown strong market resilience and growth space.

2. Say goodbye to the cold winter and the beauty market will pick up.

Last year, it was considered by many people in the industry to be the coldest year in the cosmetics industry. According to the retail data of social consumer goods in 2022 released by the National Bureau of Statistics, the total retail sales of cosmetics in 2022 was 393.6 billion yuan, down 4.5% year-on-year. This is the first time that the total retail sales of cosmetics has experienced negative growth in the past decade.

(Source: National Bureau of Statistics)

Compared with last year’s overall negative growth, this year’s cosmetics retail data can still maintain a growth trend for six consecutive months, indicating that the beauty industry’s prosperity is constantly picking up and the market is continuing to pick up. So what is the reason for the strong recovery of the beauty market?

The macro environment, macroeconomic stability and improvement are quite key factors. With the social and economic recovery, the desire for beauty consumption is rising, which drives the growth of retail sales. Similarly, the company’s performance increase is inseparable from the recovery of offline channels and the continuous empowerment of online channels. The market is picking up, and the promotion of e-commerce activities has contributed. In the first half of this year, the March 8th Women’s Day was promoted and the 618 event was held, and major brands seized consumer demand, which obviously led to the outbreak of the beauty market. The data shows that from 33 billion yuan of cosmetics sales in May to 45.1 billion yuan in June, an increase of over 36.6% month-on-month, which is a huge increase. It is not difficult to see the positive promotion of 618.

(Source: National Bureau of Statistics)

With the development of the industry, the competition of beauty track is becoming more and more fierce, and the rising of domestic beauty brands is the obvious trend of current market development.

At present, China has become the second largest cosmetic consumption market in the world. With the huge consumption prospect in China, the beauty market in China has attracted many overseas beauty brands. In the past, compared with overseas brands, China’s cosmetics industry had a thin foundation, a late start and a low reputation. In the same stage competition, domestic beauty brands performed slightly worse. Now the situation has changed.

According to industry insiders, at present, national cosmetics brands are rising strongly to seize market share. This year’s Tmall Fast-moving 618 full-cycle turnover brand list shows that Polaiya has squeezed out OLAY, a brand owned by Procter & Gamble, to become the fourth.

Domestic beauty brands have also gone abroad, attracting a large number of overseas consumers. With the upsurge of traditional culture in China sweeping the world, Chinese makeup has brought fire to domestic beauty products. With culture and oriental aesthetics as the carrier, domestic beauty products such as porch-window box, concentric lock lipstick and snuff bottle liquid foundation have gone global and been sought after by overseas consumers. The packaging of products like Hua Xizi has been integrated into the traditional culture of China, creating a unique brand positioning and successfully gaining the attention of overseas consumers.

3. The beauty track ushered in the second half

The growing beauty market has attracted a lot of players, and the industry competition is intensifying. Under the trend of more mature consumers, weaker traffic dividends and improved industry supervision, the pattern of beauty industry will be reshuffled. In the fierce competition situation, market opportunities and challenges coexist. How should beauty brands be laid out?

The beauty industry accelerates the survival of the fittest. When the tide gradually recedes, deep R&D strength is indispensable for enterprises. Increasing product research and development and patent investment, enhancing product competitiveness with science and technology, and strengthening the cultivation of "internal strength" can help enterprises go further and longer in the industry. Empowering by science and technology can ensure the stability of product safety and efficacy, and brands with strong R&D strength are expected to occupy a larger market share.

Under the background of declining online traffic dividend and continuous price involution, the overall environment of the beauty industry has recovered, and offline channels have gradually stabilized. It is a way for the company to turn its attention to offline channels to increase revenue and profit. Beauty brands will build offline channels, continuously deliver products, and realize better realization by undertaking the traffic overflow after online investment.

E-commerce needs to find offline growth points, and it is the general trend to create a diversified channel layout under the beauty line. Some brands that once focused on online began to vigorously lay out offline channels. Polaiya, whose online channel accounted for over 90% of its main business income last year, said recently that this year will be the first year of its offline restart, and it will focus on the daily chemical channel and the department store channel. Freda Bio, which owns many effective skin care brands, such as Dr. Yael and Yilian, recently announced that it will fully launch offline this year, and proposed to build an offline market scale with a total return of 350 million yuan in the first year, covering the goal of 200 million offline consumers.

Nowadays, the beauty market is constantly subdivided, and market participants say that enriching the product matrix and making efforts in the mid-to high-end market may become the way for enterprises to break the ice. In China cosmetics market, the middle and high-end market is mainly occupied by foreign brands. In recent years, with the improvement of China’s cosmetics brand building ability and R&D strength, consumers have a strong desire to support domestic products, and some brands have begun to enter the high-end market, including Mao Geping and Polaiya, from which we can see the potential and possibility of local enterprises to develop high-end beauty cosmetics.

Generally speaking, the current domestic beauty consumption fever continues to rise, and the growth of retail sales has boosted industry confidence. In the next stage, with the economic recovery and consumption recovery, the cosmetics market is still promising. However, in the process of gradually restoring confidence in the cosmetics consumer market, enterprises with technology and strength can truly remain invincible in the market.

Reporting/feedback