Tonghua University Hall is built between the Hani River and the Hunjiang River, and the simple and elegant buildings are different from the pavilions and pavilions in the Guannai, but have some Japanese flavor. Of course, this is the feeling of Einstein, who has been to Japan many times to give lectures, and he has seen this style of architecture in Japan, but the beautiful gardens of Suzhou and the Forbidden City that he saw when he was summoned by Zhu Kuansu to Beijing are not at all in this style. Einstein had been in China for a long time, and he could distinguish between Chinese construction, and the people who traveled with him could only look at the scenery, but they obviously did not pay much attention to the scenery, but admired something called a fax network in the library.

"Are you sure this came from thousands of kilometers away?" Sitting at an office-like desk in the fax network room of the school library, holding a fax file the size of a newspaper, mathematician John Neumann was puzzled, he knew that the fax machine could fax photos, but he didn't think it could also fax 'newspapers'.

"Yes, Mr. Professor. That's it, the fax network is very convenient. After the Jews arrived in Tonghua, Yang Wuming received them, but Yang Rui went hunting, and knowing that his father valued Jews, he took them to Tonghua University Hall to visit. The foreigners were not very interested, but they were quite interested in this fax network. "Academic papers from all over the country can be found on it, and there are also forums."

"Talking?" Neumann was puzzled that the literal translation of the Chinese forum into German was the seminar.

"Yes, Mr. Professor." Yang Wuming is very familiar with the fax network of the school, and the forum has also set up a gossip area before, but as soon as the water area is opened, the fax paper will go in an uproar, although the telecommunications are free. However, fax paper, fax machine, and ink cost money, so the gossip area was closed after more than a month. "China has spent 1.6 billion yuan and used up 3.14 million tons of copper to lay fax lines. At present, all university libraries are connected, and the time to fax a newspaper is only four seconds. Any academic question can be answered as quickly as possible. ”

"Three million and fourteen thousand tons of copper?" The mathematician, who is not sensitive to money, was surprised by 3.14 million tons of copper, as were his colleagues, mathematics professors from the University of Gögentin in Germany.

"If the length is 50,000 kilometers, is it 0.2 meters in diameter ......?" A mathematician of the utmost genius calculated the diameter of the copper wire of a fax cable based on the density of copper and the total tonnage of copper.

"This ......" How could Yang Wuming know how thick the fax network cable was, he smiled: "Professor, I don't think there is such a thick transmission line." It won't transfer that fast. A normal single-channel fax machine takes a few minutes to transmit a very small photo, but this high-speed, large-scale fax machine requires the use of multiple lines. If you teach here, you can meet Professor Einstein online every day. He pointed to the telephone next to him, "This is a special line, and things that are not clear on the fax can be communicated by phone." ”

Yang Wuming strongly recommended Tonghua University, hoping that these people would stay, but the mathematician apparently did not consider practical problems, and the mathematical logician Kurt Gödel helped his glasses. Asked the question just now: "Dear sir, I am still interested in the seminar, what kind of discussion is this?" ”

"This is ......" Yang Wuming couldn't figure it out, he had to ask for help from the general office of the academy. The general office was not very clear about this new thing, and the final answer was Chen Jiangong, the head of the mathematics department of Tonghua University, who said, "Gentlemen. Yes, the entire fax network is a delayed open network. The delay is due to cost and technical limitations. Therefore, the directory of column questions can only be delivered every ten minutes by the storage center......"

Chen Jiangong said that he was choked here, and the fax network of Zhonghua University Hall was the prototype of the Internet in later generations. At least it is modeled after the construction of the Internet in later generations, but due to technical limitations, it is currently only a BBS forum for researchers to discuss problems. However, the use of 3.14 million tons of copper is not for the more than 100 universities in China, it is essentially a CIMS system connecting all industrial and mining enterprises in China, Japan and South Korea, and its headquarters and data storage center are located under Yeonsan Mountain in Gyeonggi.

Under normal circumstances, the Yanshan data center only stores these data, and only when the production schedule is adjusted, the Yanshan headquarters will directly notify the factories and mines to change the process, adjust the quantity, category and progress of the production products. But if it's just numbers, you can barely do it over the phone, and the real key is the drawings.

Since the founding of the People's Republic of China, the Ministry of Industry has coded various raw materials and parts across the country, and the design drawings, process drawings and processes of various parts have also been finalized. However, this kind of thing cannot be expressed by telephone, and fax must be used, especially when the design is urgently modified. Therefore, on the basis of the previous original fax technology, the laboratory has spent a lot of money to improve the fax machine, and finally developed a high-speed (4 seconds/frame), large width (572x386mm), high-definition (36 lines/mm, that is, horizontal 810,000 pixels), high synchronization (frequency stability within 8 hours does not exceed the -7 power of ±1.34x10, that is, the 7500-meter scanning line is not allowed to deviate by 1 mm).

With this fax machine and the fax network in factories in China, Japan and North Korea, in addition to the inability to run CAD software on flat paper, and the rapid prototyping virtual processing technology based on CAD software, the CIMS (Integrated Manufacturing System) of later generations was able to achieve the minimum standard. In non-war times, the system is extremely idle, so universities, research institutes, and laboratories can communicate with each other through the system, and even waste countless fax papers to fill water. However, the head of the mathematics department of a university hall here is not clear, and in his introduction, this fax network, which cost more than one billion yuan, was specially built for all university halls in China.

Restrictions and regulations on posting (asking questions), information on refreshing (faxing) the forum topic directory every 10 minutes, clicking to read (faxing a fax request to the data center), and replying to a post after reading (forwarding it to a designated person or the owner of the topic through the data center......

When these things were introduced in detail by Chen Jiangong, everyone realized that this was actually a bulletin board, but it was different from a bulletin board. It is invisible. Chen Jiangong didn't know where the operator on the other side of the fax line was, but he only knew that the content he needed would be transmitted as soon as he called. As soon as you reply yourself, if you don't specify someone, the updated reply will be sent back in less than ten minutes.

"If the world's universities could be connected......," scratched James Frank, a 1925 Nobel Prize winner in physics and a 1928 Chinese penicillin medalist, scratched his head. Imagine it, "How nice that would be! ”

"Mr. Professor, although I have heard that the diameter of telephone cables has become thinner due to technological progress, I still think that at least 50 million tons of copper are needed; It may not be difficult, but the important thing is that someone will steal the copper wires, even if they are buried in the ground. Chen Jiangong shook his head and said, "There are more than six tons of copper per kilometer, and some people will take risks because of this." ”

As soon as Chen Jiangong said this, Frank was surprised. Indeed, on such a precious metal as copper. Even burying it in the ground can attract thieves. I don't want Chen Jiangong to say again: "But if you use light as a means of transmission and glass as a medium, you can avoid this problem, after all, glass is worthless." ”

"Light transmission, glass?" Chen Jiangong finally raised the interest of these people, Einstein said: "But the light propagation is unstable, and the only light transmission that exists now is only a mirror used by doctors to examine the inside of the body, which was only widely used after the invention of the light bulb." The transmission of light requires a stable light source, as well as a glass medium to reduce transmission losses......"

"Yes, Mr. Professor. We are looking at how to make glass with higher purity. Chen Jiangong smiled, he would love to keep this vote of mathematicians and physicists, and as for Einstein, he had better come too.

"And what about the light source?" Albert Einstein asked. "There is no reliable light source. Optical transmission is difficult to achieve. ”

"Light sources are also being studied." Chen Jiangong said. "There is hope, and so is fiber."

"Fiber?" The term was new to Einstein.

This is the word put forward by the adults. Now we have made 30dB (99.9% loss after 1 km of transmission) fiber, although it is meaningless. But there was hope. Chen Jiangong said.

He then felt that he was too stupid and that the loss of fiber transmission was a chemical problem. These people are mathematicians and physicists. He was thinking about what other experimental projects the school could come up with, when Einstein suddenly asked, "Mr. Chen." Two months ago, I saw a discussion on the forum about the problem of optical path locking, and it was ......"

......Chen Jiangong was very surprised, he could enter the forum where foreign professors could not enter, where did Einstein see it, he thought in his heart but said, "Yes, I sent it, this problem has been bothering us for a long time." ”

"It's a real problem, but I don't think it's unsolvable." Albert Einstein said. He drew a coordinate axis on the paper according to his understanding of the problem, and made a simple mark, and said: "Originally, according to the design of the Segnac ring interferometer, as well as the formula you mentioned above, that is, the output beat frequency, Delta Neu = New B minus New A = four times A divided by (L) Lambda, and finally multiplied by Omega, according to this formula The optical path is no problem, but in fact, when the input angle of light is small, the output will deviate from the straight line, so it will form a lock-in ......"

"Exactly! Professor. Chen replied that it took him two pages to make the problem clear, but Einstein now only used a simple number line to make it clear.

"Is that a solution? Add a constant rotational speed, i.e., large Omega B, such as 500 degrees per second, to the input light, which is much larger than the latching sensitivity limit, such as 0.1 degrees per second. In this way, when the light input angle is Small Omega, the total rotational speed of Big Omega is: Big Omega B plus Small Omega. As long as the Minor Omega value is not too large, and the following are satisfied: Absolute Omega Omega = Absolute Omega Omega B minus Absolute Omega Omega, and the Omega Minor Omega is greater than Omega Lesser L, then Omega Omega will stay away from the locked-in zone. In the output calculation, we only need to subtract the part corresponding to the big omega B from the received beat rate to get the delta ......"

Einstein drew a vertical line on two diagonal lines that were bisected at an angle of 45 degrees, two or four elephants, opposite each other, but deflected in different directions as they approached the origin, on the second and third quadrants on the right, and perpendicular to the x-axis, and then drew a horizontal line at the bottom of the vertical line toward the beginning of the x-axis. to connect the y-axis and indicate the large omega B. "I don't know the nature of the light source," he says. But I think the lock-in problem can be solved by adding large omega b so that the function always avoids the position of the two-line deflection. ”

Einstein stopped writing when he finished speaking. Chen Jiangong wiped his sweat and looked at Einstein with bright eyes. Laser gyroscopes are not just a problem of fiber optic latching, and this problem has been solved very early, and he posted just to find talented researchers in domestic universities to join the project. If Einstein really saw the problem two months ago, he solved it twelve times faster than the project team — a solution that took the optics lab two years to figure out.

"I'll ......" Chen Jiangong wanted to say, 'I will beg the adults to keep you', but after thinking about it, he changed his words: "Professor, I will let the laboratory give it a good try." He took the paper, but finally said honestly, "Professor, we've thought of this before." But the question is...... how do you apply an Omega B to the ring optical path? ”

"Isn't it okay to shake it mechanically?" Albert Einstein asked, this was the first thing he thought of to impose it.

"No, I can't. Omega B must be constant, and if the jitter is not accurate, it will introduce errors. Chen Jiangong said.

Chen Jiangong's opinion made Einstein nod, and then he fell silent. As a group of people walked out of the library on the grass, he suddenly said, "Maybe the magnetic field will do." ”

"Magnetic field?" Chen Jiangong was shocked. This is something that has never been considered in the laboratory, after all, electricity and magnetism have a relationship. But is there a relationship between light and magnetism?

"Mr. Chen, this needs to be tested." Albert Einstein laughed. "I can't say for sure right now, but based on the magneto-optical effect, it's possible."

The Kerr magneto-optical effect was claimed by Faraday in 1845. Later, however, more physicists believed that such an effect did not exist at all, and that the uneven surface of the metal used in the experiment caused the polarization plane of the light to rotate. It has nothing to do with the applied magnetic field. And in 1877, the Englishman Kerr also claimed to have discovered the magneto-optical effect. However, this person is unknown, and the metal he uses cannot be proven to be completely flat. Yes, it is not fully recognized.

"Of course!" Chen Jiangong responded with a smile, he is only a mathematical scholar, and Einstein's popularity is very high all over the world, since he said that there is, then there is.

"Everyone, my father has returned......" When everyone was talking, Yang Wuming, who received the news from home, smiled and said to everyone. We are waiting for you. By the way, my father hunted a deer today, saying that he was going to set up a banquet to wash the dust. ”

The old forests in the Northeast have all kinds of prey, but as before, there will be nothing in the end. Fortunately, the outside of the gate has been sealed, and when I saw a deer in the gate, everyone called the family and led the gang to go up, but who would dare to fight the laymen who had sealed the land? Don't say that a deer, even a piece of grass on the ground is also the duke's, whoever cuts it will eat the lawsuit. As a result, under the feudal style of Chiguoguo, there are many beasts in the mountains and forests. The last time I came, Einstein was tired of eating wild game at the running water banquet, but the mathematicians who had just arrived were not so good in Germany, and they all laughed when they heard that they were eating wild deer.

When everyone returned to the Duke's Palace by car, Yang Rui, who had sent the little devils to play, had personally greeted him at the door, he smiled at Weizmann and Einstein, and introduced himself to Einstein These colleagues were polite greetings to everyone. He was almost unable to see with a smile in his eyebrows, good fellow, the Göttingen School of Mathematics, and all of them are here, is this pie in the sky? And when Einstein said that more than 1,000 university professors would move from Germany in the future, he laughed even more - if you offend the Arabs, you will offend the Arabs, and first improve the academic level of China. As for oil, the damn dare not sell it to yourself!

A mathematician entered through the middle gate of the Duke's Palace, and Weizmann, who understood what it meant to open the middle gate in China, was most excited - after so many years of traveling, he finally saw hope 'again'. After the dinner party, which almost swallowed the tongue of the Jews, the last unfinished conversation began again.

"Your Excellency, the Nazis are ready to pass legislation to strip Jews of their citizenship," Weizmann said, expressing deep concern about the next suffering of his people.

"They don't have citizenship for a long time." Einstein added. "It's just to torture them legally and fairly."

"On the German side, I think this is the last time to suppress it. The next time the Nazis make another move, I'm afraid that I will have more than enough strength to do it. Yang Rui was holding a cup of Longjing, blowing the tea leaves on it.

Yang Rui was talking about the German army's preparations to march into the Rhine demilitarized zone, and a single note scared them back. However, this is also based on the premise that China and Japan act as gendarmes and actively safeguard world peace. Without the war in East Africa, no one would have believed that there would be a fool who would not send troops for his own benefit.

"Your Excellency, is the war about to begin?" Weizmann asked, saying that although he had known the answer in the United States, he had been lucky enough to have it if the negotiations between China and the United States had gone well.

"I don't know." Yang Rui took a sip of tea, and then the old god shook his head. "Let's hope it doesn't come. Although most of my compatriots are well fed and have pants to wear, they are still very poor, worse than Japan. As soon as there is a war, military expenses will be paid, taxes will be levied, and people will be killed, and no one wants to see this. Or tell me about you, what are you going to do? ”

"Your Excellency, I ask you to help us to take in our compatriots for the time being. We are willing to pay for it! Weizmann said, and he, Einstein, Gurion, and others all stood up and bowed, with great earnestness. Germany is anti-Semitic, Europe is also anti-Semitic, the United States is not allowed to immigrate due to its poor economy, Palestine is even more difficult, and China is the only way to survive in the world.

It's really hard to help millions of Jews, but for the sake of these mathematicians and more than a thousand professors, there are only 400,000 German Jews to consider, Yang Rui waved his hand to let them sit down, and he said: "Don't mention the price or anything, I didn't contact you for the price." The last time I saw something and heard something in Germany, I just felt that Jews should not be treated like this. If you can't stay in Germany, you can come to China if you want to come to China, but only outside the border. ”

Yang Rui said, Yang Wuming on the side handed over the map, and he said, "Two places." The first is the North Garden, where the Eurasian Canal will be opened this year and next, and it is convenient to come from Germany, and it is also close to Palestine, where you want to establish a state, and I will let the governor arrange for you. The second place is Hunchun, which is the fief of my student Chen Guangshou, and can give you a place in the Tumen River and the Moyawei, which is the former Bosiette Bay. There are coal mines, forests, and fields, and the ocean wharf can also help you build one, which is by no means a bad place anyway, after all, it is a guest from afar. But are you sure your compatriots in Germany will come? China is not as good as Germany, and in the eyes of many people it is a wild place. ”

The North Court is just that, Posiette Bay is indeed a good place, although there is only a blank space on the map - there is nothing, but Weizmann is sure that this place will not be bad, and the North Court is going to see the governor's arrangement over there, but with Yang Rui's power, he believes that there will be no bad anywhere.

Weizmann looked at the map and forgot to speak for a moment, and only after Gurion touched him did he bow and thank him, "God will bless you, Lord Duke." He only thanked him, and when Gurion said something in his ear, he said with some disappointment: "Your Excellency, it is true that there are many compatriots who do not want to leave Germany, they are reluctant to give up their property, and always think that the Nazi government will one day step down." ”

"What a childishness!" Yang Rui moved his airway. "This is just like some people in my country, the knife is already on the neck, and they still think that peace is precious. Many times I have to think that some people are better to die clean than to mislead people and countries. ”

Yang Rui is talking about his own people, but Weizmann listens very hard, many of his compatriots not only do not believe his words, but also think that he is alarmist, these people are so obsessed and do not come to their senses, it is okay not to save them, but after all, they are their own compatriots, and there are too few Jews in Palestine, he needs these people to support a country.

"I didn't mean you." Yang Rui saw the Jews hanging their heads and explained immediately. "I mean, those in my country who harm the people and mislead the country themselves enjoy the clear streams that they have gained. If there was a war, these people would surely run faster than rabbits, and then shout in the rear, accusing the government of betraying the country and scolding the army for being useless. After he finished speaking, he thumped his leg and said, "Let's not talk about these nerve-wracking things, you can save as many people as possible." Nameless ......" Yang Rui shouted, Yang Nameless hurriedly handed over a prepared envelope, he took it and took out a check inside, looked at the seven zeros behind '1', and handed it to Weizmann: "This is a little bit of my heart, I hope it can help." Take it, take it and save your fellow citizens! (To be continued.) )