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Chapter 485 Three-nine-nine, tie the horse to the edge of the tall building and weeping willows (7)

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    Everyone knows that since Sun Yuanqi mentioned how bats catch insects, the principle of discovering airplanes on the ground must be roughly the same.  But it is common for everyone to see bats flying at night. As for how they catch food, no one has really thought about it carefully.

    Qian Nengxun was obviously also very interested in this and asked uncertainly: "Master Sun, bats can catch insects at night. Does it mean that they have the same extraordinary night vision ability as cats, dogs, mice and foxes?"

    Sun Yuanqi shook his head slightly: "At the end of the 18th century, the famous Italian biologist Spallanzani was very curious about bats flying freely in the dark, so he captured a few bats, blinded their eyes, and put them in  In a room full of obstacles, they were still able to avoid obstacles and fly freely. A few days later, he captured these blind bats again and dissected them, and found that their stomachs were filled with insect remains.  .What does this experiment show? It means that bats do not rely on vision for flight and hunting.

    "Sparanzani then tested the bat's other senses with his usual serious attitude, and finally found that as long as the bat's ears were blocked, the bat could no longer do anything. It would fly around the room stumblingly, and would hit obstacles from time to time.  . Why is this so? Can animals see with their ears? Unfortunately, Spallanzani did not explain this, and this strange experiment came to an abrupt end."

    Everyone¡¯s curiosity was raised to the top of their throats. Unexpectedly, Sun Yuanqi gave such an ambiguous answer, which made everyone feel that they couldn¡¯t go up; they couldn¡¯t go down; they couldn¡¯t help but look at each other.

    After a long while, Sun Yuanqi continued: "Not long ago, relevant scientific discoveries showed that there is a structure called a 'nose lobe' on the snout of a bat, and there are very complex special skin folds around it. This strange  The device has the function of emitting ultrasonic waves and can continuously emit high-frequency ultrasonic waves of 40,000 to 300,000 Hz; and each bat has its own specific frequency and can use its ears to identify the sound waves it emits, so that a large group of bats can  When flying at night, you don¡¯t have to worry about disturbing each other.

    "So how do bats use ultrasonic waves to find and identify obstacles? After the ultrasonic waves are emitted, if they encounter obstacles or flying insects, those ultrasonic waves will be reflected back and received by the bat's extraordinary large auricles. Feedback  The information will be quickly analyzed in their brains, and based on the size, time, and direction of the ultrasonic reflection, they can locate their own flight path, identify different insects or obstacles, and effectively avoid or hunt them. In short  In other words, it is to use echo to locate.

    "In fact, we also use echolocation in our daily lives. For example, in a dark night or a foggy morning, when we can't see the road ahead clearly, we are used to throwing a small stone in front of us and roughly distinguishing it based on the sound of the stone falling to the ground.  You can also know the basic road conditions ahead; you can also shout a few times and use the echo to determine whether there are huge cliffs ahead. In the same way, we can also use this method to identify incoming aircraft in the sky, and we can also find aircraft lurking under the water.  Submarines, and even the fetus in a pregnant woman¡¯s belly.¡±

    In real history, the first person to invent the method of using ultrasonic echo positioning should be Lang Zhiwan, a handsome man who had an affair with Madame Curie.  During World War I, in order to deal with German submarines lurking on the seabed, he came up with the idea of ??using sound waves to detect submarines and determine their location with their echoes.  By the time the device was operational, the First World War was over.

    Radar, which uses radio methods to detect targets and determine spatial position, appeared during World War II.  At that time, Britain and Germany were at war, and Britain, which was suffering from German air raids, urgently needed a radio detection and ranging technology that could detect metal objects in the air so that it could be the first to detect German aircraft in the anti-air raid war, so radar came into being.  .  Of course, before the advent of radar, many people had already proposed the concept of using echo positioning to measure distant objects, including Langevin, Marconi, the father of radio, and other scientific researchers. Radar is just one of the comparisons.  Successfully and widely used.

    The connection between ultrasonic echolocation and bats was started by Hardy in 1920. However, Hardy's tip did not attract people's attention at the time because scientists could not imagine that lower creatures like bats actually had "echoes".  Positioning" is such an advanced technology.  It was not until 1983, when electronic measuring instruments were used to accurately measure the sound waves emitted by bats, that Hardy's view was finally confirmed.

    So in the objective history of science, the invention of radar has nothing to do with bats. It was only after the fact that everyone discovered that the two principles are so similar.  The so-called "the principles of radar and sonar are inspired by bats", "bats are the prototype of radar, and radar is the expansion of bats" can only be regarded as a kind of beautiful imagination, or bionics.  Scholar 1?The trick of self-adjustment.

    Qian Nengxun couldn't help but raise his finger and praise: "It's common for people to see bats flying at night, but who would have thought that there is such a profound truth in it? Even if someone could get a glimpse of the truth, who would have thought that it can be used to detect things in the sky?  The plane that attacked? Being able to see the small things and see the big things in this way, Mr. Sun is indeed a saint and a famous person today! Mr. Qian admires him!"

    Sun Yuanqi said politely: "Brother Qian is unworthy of his praise. Sun is just following the example of the ancient sages."

    "Oh? Which sage is it?" Qian Nengxun was a little surprised: Although he was not a well-read man, he had read a lot of miscellaneous books written by Zibu before the Ming and Qing Dynasties. There seemed to be no books that talked about bats flying at night.  The truth, otherwise I should have an impression.

    "It's Lu Ban!" Sun Yuanqi replied firmly. "It is said that he invented the iron saw based on the edge of silk thatch. He 'cut bamboo and wood to make a magpie, and it will fly without falling for three days.' These are all special features that imitate the animals and plants in nature."  Skills and by extension, eventually become a good tool for us humans. This kind of knowledge can be called "bionics", and Lu Ban is undoubtedly the originator of this knowledge.

    "The so-called bionics, simply put, is a science that imitates the special abilities of living things. For example, submarines can be built by imitating the rising and floating principles of fish swim bladders, and new buckles can be created by using the principle of cockleburs to hook clothes. As for  Building saws, airplanes, and radars that detect objects are just superficial applications of bionics. Over time, bionics will surely achieve more significant results."

    ?????????????????????????????????????????????????????????????????????????????????????: You can find a wonderful way to interpret a few short stories from classics into a profound knowledge. Is this kind of skill only available to ordinary people?  Everyone couldn't help but admire him even more.

    Li Fuji replied at this time: "Mr. Sun, our institute will quickly mobilize some young backbones to set up a research institute to develop weapons and equipment to counter aircraft. As for the bionics you mentioned, it provides a solution to specific problems.  It¡¯s a brand new idea that we will also learn from in the actual scientific research process.¡±

    Sun Yuanqi traveled around the northwest and soon returned to Beijing, waiting for the response from Outer Mongolia.

    Unexpectedly, the first person to respond to Sun Yuanqi's "Sad Medun Letter" (ultimatum) was not the so-called "Emperor of the Mongol Empire" Jebtsundamba, nor the pseudo-foreign minister Hangda Dorji, but Tsarist Russia.  Consulate in Dihua.  Their attitude was as arrogant as ever, claiming in the note: ¡°According to the six conditions for Sino-Russian negotiations proposed by the Russian Minister to China Kupensky on December 14 last year, Mongolia is a sovereign country before the two countries sign a treaty.  The country has the right to station troops on its own borders to resist foreign aggression, and no one is allowed to interfere."

    Regarding the note sent by the Tsarist Consulate, Sun Yuanqi directly chose to return it without making any comments.  In his view, Outer Mongolia is an internal matter that does not require the intervention of foreign forces, and foreign forces have no right to intervene.  If Outer Mongolia really has any reason or explanation, please ask Jebzundamba or Hangda Dorji to send a telegram directly!

    "There is no doubt that Tsarist Russia and Outer Mongolia regarded Sun Yuanqi's silence as cowardice. Under their explicit or implicit instructions, Danbaijiang Village actually led his troops to advance fifty miles towards Xinjiang again.

    Sun Yuanqi was usually gentle and gentle, and he tried his best to be kind to others when interacting with others. Not to mention big bosses such as Sun Yat-sen and Yuan Shikai, Song Jiaoren, Cai Yuanpei, Zhang Jian, Yan Xishan and others did not feel any psychological pressure when they tried to trick him.  But this does not mean that he is a soft persimmon who can be pinched by anyone. As the saying goes, "A dragon has reverse scales, and those who touch them will die." As long as Sun Yuanqi's bottom line is touched, he will incur his strongest revenge.

    The bottom line is that he has devoted countless efforts to Jingshi University.  Therefore, when the imperial guards besieged Keisei University under the instruction of Han Shimada, Zaitao and others, Sun Yuanqi became so angry that he even dared to use planes to threaten to bomb the Forbidden City. This indirectly led to the rebellion of the imperial guards and the abdication of the imperial family.

    The second bottom line is the territorial integrity of the country.  Although limited by his own strength and personal temperament, Sun Yuanqi could not personally lead a million-strong army to eliminate civilian thieves and defend against foreign aggression. However, within the scope of his ability, he still attached great importance to maintaining the country's territorial integrity.  Therefore, he once accused Sun Yat-sen of being a traitor, and he could make concessions to Yuan Shikai and others because of national territorial issues, and send troops to expedition to Tibet when his own troops were insufficient.

    Sun Yuan has been resentful about the rebellion in Outer Mongolia and the aggressiveness of Tsarist Russia for a long time. It is only because of the disparity in strength and the upcoming congressional elections that he has tolerated it until now.  In the original plan, he was prepared to postpone the Outer Mongolia issue until after the outbreak of World War I. At that time, Germany would first defeat Tsarist Russia until it was completely defeated, with its troops pointing directly at the line from the Gulf of Riga to the Dniester River;  The domestic economy collapsed, factories closed down, unemployment increased sharply, arms supplies were extremely difficult, soldiers were extremely war-weary, strikes and protests continued, and the February Revolution and the October Revolution would soon break out one after another.  By that time, Russia will be too overwhelmed to take care of itself and has no ability to take care of the slug thousands of kilometers away. The tanks under Sun Yuanqi have also just formed an army, and they can safely and boldly sweep across the rebels in the northern part of the country!

    Unexpectedly, the Outer Mongolian rebels were not willing to wait even these days, and actually challenged Sun Yuanqi's bottom line again and again.  If the tiger doesn't show off its power, you think I'm a sick cat!

    Seeing that the five-day period had expired, in the early morning of February 1, 2011, Sun Yuanqi decisively issued a punitive action order to the four provinces of Shanxi, Shaanxi, Gansu, and Xinjiang, and decided to launch a devastating campaign against the Outer Mongolian troops within 500 kilometers of the borders of the four provinces.  blow.  (Remember the website address: www.hlnovel.com)There is no way to take care of the slug thousands of kilometers away, but the tanks under Sun Yuanqi have just formed an army, and they can safely and boldly sweep across the rebels in the northern part of the country!

    Unexpectedly, the Outer Mongolian rebels were not willing to wait even these days, and actually challenged Sun Yuanqi's bottom line again and again.  If the tiger doesn't show off its power, you think I'm a sick cat!

    Seeing that the five-day period had expired, in the early morning of February 1, 2011, Sun Yuanqi decisively issued a punitive action order to the four provinces of Shanxi, Shaanxi, Gansu, and Xinjiang, and decided to launch a devastating campaign against the Outer Mongolian troops within 500 kilometers of the borders of the four provinces.  blow.  (Remember the website address: www.hlnovel.com
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