The Institute of Applied Physics and Computational Mathematics, when you hear the name, it has something to do with computers and mathematics. If you don’t say anything, it’s mostly because they have something to look for.
The place is really remote. Zhou Zhi saw a mountain on the road and asked, "Where is there?"
"Oh, that is Baiwang Mountain."
"This is Baiwang Mountain. Did we all run to the north of the Summer Palace?"
"Mr. Zhou Zhi knows quite well. Have you been to our courtyard before?"
"No," Zhou Zhi smiled and said, "I just read a few local chronicles about the capital, until Baiwang Mountain blocks West Lake in the south and Yanping in the north. According to legend, walking south towards the capital from the foot of the mountain, walking over a hundred miles to the direction of the capital, you can still see its peak, so it is called 'Baiwang'. When She Taijun watched Yang Liulang go down the mountain to fight against Liao, there was also a 'Wangertai' on the mountain."
"Yes!" Xiao Qian nodded: "Our unit often runs to that mountain, and there is indeed a Wangertai on the mountain."
The scenery in this area is actually quite good. There are tall poplars on the roadside, and there is also an artificial canal with clear water quality behind the poplars. The edge of the canals is green and grassy, but it is a water diversion line from Miyun to Beijing - Jingmi Canal.
A few kilometers past Baiwang Mountain, I arrived at a unit where soldiers stood guard. When I saw Xiao Qian coming onto the co-pilot, I opened the door and put the vehicle in.
After getting off the bus, Zhou Zhi looked around and found that it looked similar to many old-fashioned research institutes. The red brick Su-style building is not small in scale, the floors are not high, and there are several buses parked in the yard, which should be to pick up and drop off employees to and from get off work.
There is no need for Shu to do this. Four-leaf Crocodile can reimburse taxi fees, because whether it is from Shu Da or from Digital Plaza, it is difficult to exceed fifteen yuan for taxi fees.
The capital is different. The place is too big. It is basically located on the fifth and a half-way road in the later generations. There is no bus for commuting and getting off work, so everyone doesn’t have to go home.
When Zhou Zhi's eyes fell on the bus, Xiao Qian said, "There is my own guesthouse in the institute, and the conditions are pretty good, don't worry, you two."
That means that you can live here without having to take the bus back to the city to find a hotel with everyone.
"Enjoy and accommodation can be solved. If the two units have a daily supplement for business trips, our guesthouse can also issue certificates to the two. You can also get them back to the unit and you can also exchange subsidies."
This is also a fun thing. In the future, people basically find a hotel to live in after business trips, and then there is a reimbursement system according to the unit's regulations.
The current situation is a little different. Although some units have implemented this system, they often encounter trouble when going to Beijing on business trips.
First, hotels in Beijing are much more expensive than second- and third-tier cities, and second, you may not be able to book hotels. Therefore, many units have set up guesthouse systems in order to solve the problems of foreign employees studying and traveling in Beijing.
According to the document, people who come to the business trip will be in the guesthouse during the business trip, and they don’t have to pay extra money. They only need to pay for the tickets to go home when the business trip is over. After returning to the unit, they only need to reimburse the tickets. Then, they can get the business trip subsidy given by the unit based on the number of days on the business trip and are finished.
Convenience is indeed quite convenient, but it increases the burden on the tertiary industry of the guesthouse unit. In later generations, such practices were gradually eliminated. Except for big cities such as the capital, only large units were retained.
"Oh, it's good to solve the problem of food and accommodation." Zhou Zhi nodded: "It proves that there is no need to open it."
Walking into the building gate, walking through a long corridor. Although it was an old red brick building, an elevator was also set up. Xiao Qian took the two of them into the elevator and pressed the third floor. After going out, he walked for a long section and came to a place similar to a small classroom. "Xiao Zhang, I've brought it to you." Xiao Qian said to a young man in the room.
The young man walked over excitedly and shook hands with Mai Xiaomiao and Zhou Zhi: "Teacher Mai, Teacher Zhou, hello, I am Zhang Weiting from the Institute of Computational Mathematics. Director Sun and Director Qin are already waiting for you."
In fact, until now, Zhou Zhi didn't quite understand why he came here for. After Zhang Weiting changed his office, he saw Qin Haifeng who was chatting with an old man, and he was relieved: "Uncle Qin." When he saw the person chatting with Qin Haifeng clearly, he took a breath: "Academician Sun?"
"Yo? Xiao Zhou still knows me?" The old man looked at Zhou Zhi kindly: "Director Qin told you about me?"
"I don't." Qin Haifeng immediately shook his head: "The habit of keeping confidentiality should not be said. I didn't mention your old name to this kid."
"The People's Literature in 1988 published a documentary literature, which talked about the development of my country's nuclear industry, with your name on it." Zhou Zhi said admiringly: "That was the first time your name was decrypted. Later, whenever I saw reports about you on newspapers, magazines and TV, I would notice it."
"Old Deng said that without you, there would be no nuclear industry. Legend has it that the calculation data of my country's first atomic bomb was knocked out by scientific researchers with an abacus, and you are the one who knocked the abacus."
Academician Sun's name is Sun Liangdong, and waved his hand after hearing this: "The report is really exaggerated. Our calculation work at that time did use abacus, but it was not the main one. It was more manual. It was solved by advanced mathematical tools. If you really want to use the abacus to knock out the data of the atomic bomb, Xiaomiao would not laugh at us." "Hello Grandpa Sun, hello Uncle Qin." Mai Xiaomiao said hello to the two politely.
"Xiao Miao, your information is ready?" Qin Haifeng asked. "Yeah, it's ready." Mai Xiaomiao nodded. "Wait, what information?" Zhou Zhi was confused.
The newest ⊥Xiao⊥Speak⊥Send⊥Six⊥9⊥Book⊥⊥⊥⊥Back⊥⊥⊥⊥! "You are a liberal arts student, do you know the Venturi phenomenon?" "Uh, I don't know." Zhou Zhi admitted it honestly.
"Do you know the Bernoulli effect?"
"It is probably known that the increase in flow rate is accompanied by a decrease in fluid pressure, right?"
"Yes, Bernoulli's law is very common. In fact, the Venturi effect we see most often."
"The Venturi effect was discovered by Italian physicist Venturi. This effect is manifested in the phenomenon that the fluid has an increase in flow when it passes through the reduced overcurrent section, and its flow rate is inversely proportional to the overcurrent section."
"When the fluid blows through the barrier, the air pressure near the port above the leeward surface of the barrier is relatively low, thus creating an adsorption effect and causing the flow of air. People also invented the Venturi tube."
< br>"The principle of Wen's tube is actually very simple. It is to turn the fluid from coarse to thinner to speed up the flow rate of the fluid, but the cost is that the fluid forms a 'vacuum' zone on the back of the outlet of Wen's tube."
"The flow rate is large at the small section, and the flow rate is small at the large section. This is the principle of Wen's tube." Qin Haifeng said: "However, when the fluid velocity reaches transsonic speed, this is the opposite. The larger the cross-section, the faster the flow rate. This effect is called the Laval effect, which was discovered by a physicist named Laval."
"So we can design a venturi tube with a narrow throat, because the Venturi effect is 'the flow rate is large at the small cross-section, and the flow rate is small at the large cross-section,' so as long as the pressure and flow rate are suitable, when the narrow throat is small to a certain extent, the flow rate can be made exceed the speed of sound."
"When the transsonic fluid moves, it no longer follows the Venturi effect, but on the contrary, follows the Laval effect of 'the larger the cross-section, the faster the flow rate'. So we just need to design a trumpet behind the narrow throat, and we can increase the flow rate of the fluid to several times the speed of sound."
"The nozzle of the rocket propeller!" Zhou Zhi immediately thought of this based on the shape and function of the thing described by Qin Haifeng. (This chapter ends)