After the Qixi Song Party, the eldest princess said to Wang Mumu: "Mumu, Hudong returned to Ryukyu to marry you, who knows, I will go to the harem with you to fight the eight women in a while; After a while, he created eight immortals and had the kingdom of Luzon; After a while, he disguised himself and went to Bianjing to smash the tank, and the white snake spirit gourd scooped and drilled tunnels and hit sharks. It's been more than a year, and I've been busy. Now, okay, it's not a big deal, you should also handle your marriage with Hu Dong. ”

Wang Mumu calmed down and felt that he was a little afraid of marriage? To be honest, Hu Dong is smart, interesting, beautiful, knowledgeable, and knowledgeable, and with her, I have always felt like I am with a smart, capable and well-behaved sister. However, Wang Mumu knows that it is impossible for him and Hu Dong to become brother and sister, and it is impossible to keep Hu Dong in the name of a girl who has a room, and if he drags it out for a day, Hu Dong will feel uncomfortable for a day, if he is not careful, it will really be like Sanniang said, there are either multiple women or dead people in the family. Alas, why bother, you top three don't care, I don't want to be hypocritical, I'm afraid I'm sorry for you! Hehe, a thousand-year generation gap, deep!

Wang Mumu thought that when Hu Dong went out as the CEO, he established a system of washing the feet of the prince at home, and he did not feel wronged at all, on the contrary, he enjoyed it; However, these four beauties, whether they are the eldest princess, Xiao Rourou, Xiao Sansan, or Xiao Dongdong, are extremely happy, with a little red flower on their faces, and they have fallen to their hearts. Now, Wang Mumu wants to give Hu Dong a different wedding, because this wedding has been said a long time ago, it is a group wedding, and many people are waiting to get married with King Jinghai, so the big form of the wedding cannot be changed. So, give Hu Dong some good gifts, but the best jewelry in the Ryukyus is all brought by Hu Dong and Hu Xi, and Wang Mumu can't make this for Hu Dong. Wang Mumu thought, what I can give, what I want to give, what I should give, should be what I can give but others can't, then, what is good? Wang Mumu was patting his head.

Wang Mumu has been researching personal aircraft for some time, which is a kind of aircraft that can fly off the ground, fly in space, be light and flexible, and fly at low altitude and low speed. Structurally, it can resemble a small platform, on which people stand; It can be like a big rotor, with a person hanging underneath; It can be like a sofa chair on which people sit; It can be like an ultralight helicopter; More by a backpack that carries people to the sky. There are many forms of backpacks to carry people to the sky, including fan-type backpacks, jet-type backpacks, backpacks that are as large as cabinets, and backpacks with small clothing. In terms of power, there are many options for electric drive, fuel drive, ducted fan for thruster, turboshaft engine for thruster, and miniature jet engine for thruster.

Wang Mumu considered that in the era he is in now, as a flying machine, he is already the only one and has no other branches. Starting with a hydrogen balloon, not a hot air balloon, would put an end to all other clever imitators. To make a hot air balloon, smart people should be able to copy; Make hydrogen balloons, where can others make hydrogen? As for the successor monsters and fuel engine-boosted aircraft, no one can start with it, and he has built several physical and chemical research and production systems in the Ryukyus, which is not something that any small handicraft producer can hope to match, and there is a generation gap of eight or nine centuries.

Wang Mumu is now not as high, fast, and long as the goal of the aircraft is like in later generations, as long as it can fly, slower, lower, and have a certain ability to stay in the air, but it must be safe. Therefore, Wang Mumu did not choose a jet engine, nor did he choose a ducted fan or a turboshaft engine, but chose a power fan between a small helicopter and a large rotor fan, which burns a high-energy hybrid fuel and supports hybrid power.

Wang Mumu has invested almost all of Harvard's scientific and technological reserves in this aircraft, from novel materials and new manufacturing methods, from novel systems to new structures, all of which have been painstakingly and painstakingly depleted. This person's flying machine also has the support of Shen Boyi and Shen Qingzhi, although there have been a lot of good things from their hands before, but they are all enjoyed by others. Now this small aircraft is not big, and after success, I can go back and forth to and from work, thinking that I can fly alone, and I am motivated to go day and night.

Wang Mumu is in the production of this aircraft, regardless of the cost. He started from reducing its own weight, and the whole machine did not use a little steel, carbon fiber structure, PVC fins, aluminum-magnesium alloy engine, and fuel cell. After several enlargements and reductions, it has been shaped into a rotor diameter: 2.4 m, take-off weight: 108 kg, empty weight: 28 kg, maximum speed: 60 km/h; Cruising speed: 45 km / h; Upper limit of service (without drop tank): 180 m altitude: 20 km distance. It consists of energy, engine, and steering systems. The thrust generated by the engine was enough for a single person to rise into the air; The control system is used to maintain balance and change the flight state. The entire device is carried by a single person (mounted on the back) and can complete actions such as ascent, descent, hovering and level flight. It can be used to fly over obstacles such as rivers, walls, etc. The flight distance and empty time are determined by the auxiliary fuel tank carried, which can generally stay in the air for half an hour to 6 hours, that is, the flight distance is 20 kilometers to 270 kilometers. This data is gratifying enough for the current Wang Mumu.

Wang Mumu is now going to decide on the plan of combining man and machine, and the reason why Wang Mumu chose the current way of traction and take-off is also premeditated, he wants to combine this aircraft with his own unique overall armor. From the perspective of the aircraft, this is the way to choose a group of people; From the perspective of the overall armor, this is another qualitative improvement of the overall armor, and it can fly.

For the combination of the aircraft and the overall armor, Wang Mumu chose a detachable loading method. On the back of the overall armor, there is a set of quick-release connectors, which do not need to be removed when used, just like the previous chainsaw, and rest on the arm when not in use, which is cumbersome.

Now, Wang Mumu has entered the modular design and manufacture of his overall armor. His overall armor, in addition to a personal flying machine with a large fan on its back, has a lot of small secrets. For example, there is a compressed air cylinder and a double-layer first-aid airbag at the right thigh, when the double-layer airbag is inflated, it is a large hydrogen balloon, and when it is not inflated, it is a parachute, which can help the user fall, float, etc., and it is also a "thunder scare" in an emergency. There are a lot of storage points in this overall armor, some of which put ** drugs, some put life-saving drugs, some put detective auxiliary materials, and so on. The overall armor is combined into two dagger guns, and the other weapons can be selected according to the user's preference. The overall armor is ergonomic, and on the premise of not affecting human behavior, the bullets of a 100-round dagger gun and a battery capable of generating 20,000 volts are hidden in the armor. Wang Mumu's battery packs, which were originally mainly used as attack weapons, can now be linked to the hybrid system of personal aircraft, and can be converted into electrical energy when the fuel engine output is excessive; Personal aircraft, on the other hand, can turn off the engine and use electricity when it has low power consumption such as slow descent or levitation. In this way, Wang Mumu's power system can enter the fuel-saving mode of the petrol-electric twin engine of the C-class car in the previous life.

Wang Mumu has not made any moves on the equipment of the helmet of the overall armor yet, he is going to make this helmet into a wireless communication tool, which is currently under development, so he has reserved a place for later loading.

Now Wang Mumu has been able to produce trichlorosilane three or four years ago, Wang Mumu is in his own voltaic battery electrolysis of salt water and created the chlor-alkali chemical industry, and in the chlor-alkali chemical industry must produce hydrogen chloride and hydrogen on the basis of the production of trichlorosilane, because in this era to get ferrosilicon powder is not difficult, success or failure depends on whether you recognize it.

Wang Mumu's production of trichlorosilane is to start the semiconductor industry, radio industry, and IT industry. Therefore, with trichlorosilicon, whether it is by the straight-pull method or the suspension area melting method, the rod-shaped monocrystalline silicon can be obtained, and then the cutting, grinding, polishing and clean packaging process is carried out to obtain the monocrystalline silicon wafer, fortunately, Wang Mumu now has high-purity electronic grade sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid and caustic soda, post-treatment, no problem.

The difference between monocrystalline silicon and polycrystalline silicon is that when molten elemental silicon solidifies, the silicon atoms are arranged in a diamond lattice into many crystal nuclei, and if these nuclei grow into grains with the same orientation of the crystal plane, monocrystalline silicon is formed. If these nuclei grow into grains with different plane orientations, polysilicon is formed. The difference between polycrystalline silicon and monocrystalline silicon is mainly manifested in physical properties. For example, in terms of mechanical and electrical properties, polysilicon is inferior to monocrystalline silicon. Polysilicon can be used as a raw material for drawing monocrystalline silicon. Monocrystalline silicon is arguably the purest substance in the world.

With monocrystalline silicon, king wood can be used to make diodes and transistors. Wang Mumu's plan is a reversal of the process of scientific and technological development in his previous life. Humanity's electronic technology probably began with Newton's discovery that red-hot iron emits a cloud of electrons (later known as the Edison effect). In 1904, the British inventor Fleming was inspired by this and invented the electron tube diode, which optimized the wired communication at that time.

Later, the impoverished American inventor DeForrest cleverly added a grid between the filament and the plate pole of the diode, thus inventing the first vacuum triode. This small change has led to unexpected results. It is not only more responsive and capable of producing music or sound vibrations, but also integrates three functions: detection, amplification and oscillation. It became the starting point of the electronics industry. DeForrest himself was pleasantly surprised, thinking that "I had discovered an unseen empire in the air".

For more than 40 years, tube devices have dominated the field of electronic technology. But there are quite a few shortcomings. In World War II, the shortcomings of the tube were even more exposed. The effect of ordinary electron tubes used in the radar operating frequency band is extremely unstable. The tubes used in mobile military instruments and equipment are more clumsy and prone to failure. Therefore, the inherent weakness of the electron tube itself and the urgent wartime needs have prompted many scientific research units and the vast number of scientists to concentrate their efforts on rapidly developing solid components that can replace the electron tube.

In Wang Mumu's previous life, the telegraph was invented in 1844, which could communicate with each other from afar, but it still had to rely on "wire" connection; In 1895, the world's first radio receiver appeared; Semiconductor radios didn't come out until 1954.

One day in June 1954, in a room at Bell Labs in the United States, a very ordinary radio was playing soft music, and many visitors stopped in front of it. Why does everyone have a soft spot for this radio? It turned out to be the first radio to replace it with a new solid component, a transistor, instead of an electron tube. Although there is a lot of interest in this radio. However, society at the time was unimpressed with the transistor itself.

What is a transistor? In layman's terms, a transistor is a solid electronic component made of semiconductors. Metals such as gold, silver, copper, iron, etc., which have good electrical conductivity, are called conductors. Wood, glass, ceramics, mica, etc., do not conduct electricity easily and are called insulators. A substance with conductivity between a conductor and an insulator is called a semiconductor. Transistors are made of semiconductor materials. The most common materials in this category are germanium and silicon.

Semiconductors are a material that was only discovered at the end of the 19th century. At that time, people did not realize the value of semiconductors, so they did not pay attention to the research of semiconductors. It was not until World War II, due to the development of radar technology, that the application of semiconductor devices, microwave ore detectors, became more and more mature and played an important role in the military, which aroused people's interest in semiconductors. Many scientists are engaged in the in-depth study of semiconductors. After intense research work, American physicists Shockley, Bardeen and Bratton took the lead in co-inventing the transistor, a three-pivot semiconductor solid element, known as the "three-legged magician". Its invention is a great event of epoch-making significance in the history of electronic technology, and it has created a new era - the era of solid-state electronic technology. The three of them were also awarded the Nobel Prize in Physics in 1956 for their research on semiconductors and the discovery of the transistor effect.

On June 30, 1948, six months after the invention of the transistor, Bell Labs presented the transistor to the public for the first time in New York. This great invention amazed many experts. However, there is a lot of skepticism about its practical value. The New York Times on July 1 of that year reported the news in the form of a short message of only 8 sentences and 201 words, which should have shocked the world. In the public mind, transistors are nothing more than laboratory treasures. It is estimated that it can only be used for small things such as hearing aids, and it is unlikely to come in handy.

Later, the transistor continued to overcome its shortcomings and catch up with the electron tube, and by 1950, the first PN junction transistor was manufactured. This is a milestone in the history of the development of electronic technology, and it is a gorgeous and colorful wonder that blooms on the tree of electronic technology. Transistors have many advantages over electron tubes.

Transistor and semiconductor technology is also the basis of computer technology, infrared detection technology, solar energy technology, space technology, fluorescence technology, etc. Since Fleming's invention of the vacuum diode in 1904 and DeForrest's invention of the vacuum triode in 1906, electronics has developed rapidly as a new discipline. But the real leaps and bounds in electronics should have started after the invention of the transistor. In particular, the emergence of PN junction transistors has opened up a new era of electronic devices and caused a revolution in electronic technology. In just over ten years, the emerging transistor industry has quickly replaced the position that the tube industry has achieved through years of struggle with its invincible ambition and the unscrupulous momentum of young people, and has become the vanguard in the field of electronic technology. Moreover, the miniaturization, automation, computerization and robotization of microelectronics technology will fundamentally change human life. It will affect many aspects of human life: labor production, family, politics, science, war and peace.

In view of the history of electronic technology progress that he personally experienced in his previous life, Wang Mumu naturally bypassed the electron tube and went straight to the semiconductor. Like the scientists in his previous life, Wang Mumu's journey from trichlorosilane to rod-shaped monocrystalline silicon and then to monocrystalline silicon wafers requires a huge amount of labor and great overhead, but no one in Harvard can guess how good this garbage-like thing is. What's the use? However, it is very fortunate that at Harvard, for Wang Mumu's instructions, the implementation of understanding, and those who do not understand will be meticulously implemented, Wang Mumu is here, he is God! It's a ghost too! No one wants to disobey him, no one dares to disobey him.

Since there are diodes and transistors, Wang Mumu's electronic dream has broken through a bottleneck, and he still has a little impression of some transceivers and other lines in his previous life, but for the data of each component in the line, how much microfarad and how many ohms of capacitance resistance, who can remember? Wang Mumu is pleased that Xiao Dani, who likes to study celestial phenomena, is very fond of those "mysterious" things, Wang Mumu explained the principle to her, after explaining the requirements, all the capacitors and resistors on the line are using variable resistors and variable capacitors, thirty little golden cats, the cat is spinning in the house, wearing headphones, looking at the ammeter and voltmeter, a group of data permutation, comparison and screening, drawing countless tables, looking for the best partner. Now, the initial results are waiting for Wang Mumu to finalize and integrate the mass production.

Wang Mumu threw the perfection of his personal aircraft to the two surnamed Shen, and these two always lack enthusiasm for things that are too "mysterious", and for things that can be seen and touched, these two will forget to sleep and eat. Since Wang Mumu left the Sea Overlord and returned to the Green Ball, he has been tinkering with the little golden cats such as Little Daini in the clouds and fog with those things that outsiders don't seem to know, can't see or touch, and it's been several months.

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Dear book friends, today is the in-service personnel to study for a master's degree in the national joint examination, the national adult college admissions unified examination, self-study examination, junior/intermediate/senior accounting title examination, computer level test, TOEFL test, IELTS writing machine prediction, etc., more exams to get together, the book friends involved in the examination have worked hard, send the first slip, for multiple choice questions, prepare but not use: three long and one short choose the shortest, three short and one long choose the longest, the length is different and choose B, the uneven choice of D, the same length is A, the same short is C, and finally look at luck.

Ha ha! Nothing, give yourself a confidence! A calm! Finally, I wish you all the best of luck!