Chapter 70 is interrelated, and the subtleties are gradually found to be the key

2012－1－1

It was New Year's Day and the weather was good. Pen & Fun & Pavilion www.biquge.info Because it was a holiday, Lin intended to get up later. When he walked into the school gate with a backpack and sportswear, familiar aunts and uncles thought he was going on a trip. Lin said: "No, go to the office and go to the net." So, everyone said he was very hardworking. In fact, Lin's diligence is to stay in the office and play with the computer, nothing more. As Lin said, "If I have a few thousand dollars to spend, I'd rather buy a new computer than go on a trip." Because Lin feels that time is not consumable, and computers that can be seen and touched are more realistic. Then, the opinion of the elders is that as long as Lin shows up in the office, he is busy with work, and he is a good and positive young man. Lin's point of view is that such a state and dedication are basically equivalent to relaxing recuperation.

At 9 o'clock, Lin conducted a trial of Thunderbolt software at home, he first installed winXP with a pure version of the system disk, so that it could go online, and then used a one-click restore wizard to clone the C disk system, as the basis for research. Next, he installed a pre-numbered Thunderbolt software, and then used the 360 security guard's network speed test function to test the speed of the network, and then used Thunderbolt to download a specified document. The ratio of the two is a relative network speed. This principle is similar to his study of the normalization operation of fairy painkillers, which can be evaluated more effectively. Then, after testing a numbered Thunderbolt software, Lin will copy its performance as a text file under the installation folder as a record. Then uninstall this Thunderbolt, and then use one-click restore to restore the C drive operating system.

At 10 o'clock, Wei Gangzhuang called and asked if Lin was free. Lin said that he was busy, so Wei Gangzhuang said, "Okay, you can be busy first." "Lin is such a person, if you have something important to ask him to help with, he will help, but he doesn't want to go to social affairs. Another reason is that Lin has always felt that Wei Gangzhuang and himself do not have much similarity, so they don't know what to talk about together.

At 12 o'clock, after about 12 trials, Lin picked out the best Thunderbolt for TCL computers, and then sorted all Thunderbolts with speed and marked them on their folders.

At 12:30 at home, my parents ate steamed grass carp and mustard cauliflower, Lin ate chives and taro and cabbage soup, and my mother was eating fish because my father asked a word, and accidentally stuck a fish bone when I replied, so I blamed my father.

At 13 o'clock, Lin took a nap, and came to the office 20 minutes later, the students who had agreed to test had not yet arrived, Lin opened the instrument to prepare to test his own sample, this time the test was the polarization excitation spectrum and polarization emission spectrum of the fairy painkiller wine, and the parameters were set under Lin's many experiences, in fact, the instrument originally had these functions, but such a test was not a mainstream project, so there were fewer people who studied it. And Lin has such a convenience, which must not be wasted.

Lin began to download the winXP operating system, what he wanted to do was to optimize the operating system, and the evaluation criterion was also the speed of the network, such as installing a new XP, testing its network speed with 360 security guards, and then using a superπ to test the speed of the system, the ratio of the two as a relative speed, and then trying it on multiple computers, the higher the relative value of XP represents its better.

In Lin's thinking, normalization is an important marker and a long-term consideration. And monetization is also a measure of him, that is, if there is an image file, it is always much more pragmatic to use it than to put it in an ISO file.

At 14 o'clock, Tencent popped up a news that a Briton had made a rocket-propelled bicycle and set a new bicycle acceleration record, Lin felt that such a person was very professional, and its related technology would definitely be converted into new civilian technology. The re-innovation of one's own technology may only reach a limited level, and it is only a drop of water and a grain of sand in the entire scope of human scientific research, and its role is limited. However, for his own life, it is almost all remarkable.

At 15 o'clock, Wang Kai asked Lin: "What is the difference between the fluorometer on the second floor and the fluorometer in room 105?" ”

"The main thing is that this one can test the fluorescence lifetime," Lin said.

Lin continued: "But the fluorometer on the second floor produces a smoother picture, and the one in room 105 sometimes has more burrs. ”

After a few seconds, Wang Kai saw that the fluorometer could not be used for the time being, so he went out to breathe. Lin continued his own testing. When the sonicator used by Wang Kai stopped working, Lin helped him adjust the time to half an hour, and then the sonicator continued to oscillate Wang Kai's sample. The cacophony filled the room, making it particularly piercing. At the same time, Lin also felt very happy, because his carefulness could help other people.

When the ultrasonic instrument was bought, it was for the convenience of students to test samples, for which Lin also got the approval of Huotou for reimbursement, since the purchase back to the present, Wang Kai should be the second student to enjoy the service of this instrument.

Hu Lanfang asked Lin: "Will writing this novel help me?" ”

Lin said: "In the process of writing, my expression ability has been enhanced, and I used to be less talkative, but now I am more talkative." If you look for a job in the future, there are several people with the same ability to work, and if you are more able to say that you have an advantage. So when you write, you actually refine yourself. ”

At 17:05, Hu Lanfang came to settle the cost of the day's sample measurement, and Lin asked her: "By time, or the number of samples?" ”

Hu Lanfang said: "According to the time." ”

Lin asked, "How many hours?" ”

Hu Lanfang said: "2 hours. ”

After that, Lin crossed out the 80 yuan fund of the research group.

Wang Kai heard it and asked Lin, "Teacher Lin, how much is an hour according to the time?" ”

Lin said, "40 yuan an hour." ”

Wang Kai said: "Then what if I didn't think clearly about the time settlement, or the number of samples? ”

Lin said: "The settlement will be based on the lowest price of the two. ”

Wang Kai smiled and said, "Okay." ”

At 17:07, a student from Zhao Yuan came to ask Lin to borrow pliers, and Lin asked her what she wanted, and she said she didn't know.

Then Lin showed her the two most common pliers, and the student said, "I'll borrow both." ”

Lin said, "Okay. ”

When Lin went to the WC on the 2nd floor, he saw Master Zhang in Room 210 helping the students repair the instruments, and it was estimated that the students just now came down to Lin to borrow tools according to Master Zhang's instructions. Lin thought that he hadn't chatted with Master Zhang for a long time, and then returned to room 105.

At 17:11, Wang Kai was testing the fluorescence while turning on the ultrasonicator, and Lin felt very ......noisy. Tietong's broadband suddenly became unusable, so Lin immediately transferred to the school's broadband. At this time, it happened that Master Zhang came to return the pliers with a tool kit. Lin and Master Zhang chatted for a long time, asking about the sensor, and Master Zhang patiently explained many basic questions.

Lin said: "Master Zhang, I have the opportunity to learn thyristor knowledge from you......"

Master Zhang said, "Yes." "In fact, both the thyristor and the MOSFET can control the power supply, the difference is that the working frequency of the thyristor is low, while the frequency of the MOSFET is high, which is the biggest difference between the two. "The more common use of thyristors is the power control of the oven, which can adjust different powers. "MOSFETs are generally found at the front end of chargers, and charger damage is generally caused by damage to MOSFETs."

Lin asked: "Is there a way to use a DC battery to adjust a higher DC voltage?" ”

Master Zhang said: "Generally, the FET is used to lift the DC current, and the pulse current is generated through the alternating conduction of the FET, and then the voltage is increased through the transformer, and the voltage obtained in this way is called the inverter voltage. ”

Master Zhang continued: "Now that there are integrated blocks, a lot of work has become convenient, for example, it used to be very troublesome to convert high voltage to low voltage, first to adjust the voltage, but also to rectify. Now it is very convenient to have a three-terminal voltage regulator source, it has a variety of specifications to choose from, from how many volts to how many volts, step by step down, simple and easy. ”

Lin said: "I am more interested in the repair of computer power supplies and the digital display of various sensors. ”

Master Zhang said: "In the past, it was very troublesome to test the quality of a device, and it was necessary to remove the electronic components from the circuit board and measure them one by one. The problem now is that the measurement method used is completely different from before, the same measurement of three pins is the same, it used to be a three-stage tube, and now it has three pins that expand a lot of functions, so the measurement method is very complicated. "In terms of the quantity method, it is also more troublesome, for example, the thyristor is in the lowest ohmic level, while the MOSFET is generally in the highest range, although their functions are generally similar."

Lin asked: "What is the idea of overhauling electronic equipment in general?" ”

Master Zhang said: "Take the charger as an example, the general charger does not work, first check whether the insurance has electricity, if there is electricity, it means that there is no problem, and then measure the voltage after rectification, such as rated 300V only 250V, generally the capacitor is broken, and the voltage cannot be raised." "If there is 300V after rectification but the charger is not working, it is very likely that the starting FET is broken.

Master Zhang continued: "No matter what kind of instrument, the working voltage on the circuit board is 9V or 12V, and it is generally necessary to see whether the voltage is correct. There is no problem with the voltage, and the repair is easy to have good results in the end. ”

Master Zhang took his mobile phone out and asked Lin if he was playing. Lin said: "I don't play, and the mobile phones I use are the cheapest 65 yuan a piece." ”

Master Zhang said: "No wonder I added you ** friend some time ago and didn't see you back." ”

Lin smiled and said, "I can't keep up with the trend of the times." ”

Lin said: "I once had an idea, the current mobile phone on the market is cheaper than dozens of yuan, can it be turned into a walkie-talkie on such a basis? ”

Master Zhang said: "In the past, my friends and I tested the communication ability of the walkie-talkie, which was about 15 kilometers away, and when we used the 16th gear of the walkie-talkie, we spoke very clearly. In the past, radio was regulated, and private individuals could not exceed 1 km, which exceeded the management of the Guilin Radio Commission. One day my friend and I were talking to each other in the Aerospace University of Technology, and we heard the voice of a person from 8 Mile Street. Therefore, such management is not very strict now. ”

Lin said: "What is the role of different gears? ”

Master Zhang said: "When the 1 frequency band is used for long-distance calls, the transmitted frequency is relatively low, and it is easy to be interfered by nearby strong magnetism; The 16-band is better. ”

Master Zhang said: "In the past, radios were divided into two types: frequency modulation and amplitude modulation, and the frequency modulation radio sent out the audio through the change of frequency; AM phones transmit audio through the change of amplitude and the carrier wave. Comparatively, FM radios can receive farther at the same power. Nowadays it is mostly FM radio. ”

On the side, Wang Kai had already completed the test, and he interrupted the conversation between Lin and Master Zhang, saying, "Mr. Lin, I have already tested it, now register and transfer the fee." After Lin arranged Wang Kai's affairs, he chatted with Master Zhang again.

At 18:10, Lin sent Master Zhang away, and then returned to Room 105 to do some sanitation work, turn off the instrument, and sort out the content of Master Zhang's speech. Lin has a feeling that he may not be able to learn about electronics in the future with his own personality, but he is still interested in learning about it. Correspondingly, Master Zhang's serious teaching attitude made Lin rise to respect, and he felt that if he didn't study seriously, he couldn't live up to this good teacher.

Lin himself is a little inert, and it is best for Master Zhang to make all the instruments he wants to use and hand them over to himself. But the abundance of electronic devices and intelligent computer-controlled devices aroused his infinite desire to explore. Master Zhang is undoubtedly the best guide sent by God to learn from him, and if he seizes this idle period, Lin will definitely be able to grow a lot. So Lin planned to find some literature on thyristors and FETs on the Internet first, and learn from Master Zhang on this basis.

At 19:13, Lin Shang did not feel hungry, he sorted out the appointment test form for the next few days tomorrow, and then posted it on his **, the demand for student testing has been relatively high recently, Lin plans to test more data and send it to everyone in time.

Lin found that sometimes there is no way to log in to the starting point Chinese network with the most familiar opera browser, but it is possible to change the browser, so he will wonder if there is such an unspoken rule in the software industry, that is, your browser is valid within a few days, and it is invalid within a few days, so that everyone in the software industry can develop together.

19:17,Lin feels that in fact, what he expects most is to appear a strong browser,A strong antivirus program,So you don't need to make your own choice,At present, it seems that 360 takes on this big responsibility,But once the 360 software is installed,It's easy to get slower and slower in a few weeks.,And there are a lot of strange things.。

Among the search engines, Lin's favorite is Baidu, because it is simple and efficient, and it is very suitable for ordinary users. Of course, Google is very good, but now it has withdrawn from the Chinese market, and it can't be used if you want to.

At 19:20, the fluorometer had enough time to dissipate heat, and Lin decided to turn it off. Then I went to room 205 to check the water, electricity and equipment, and when I took the key to room 205, Lin thought of something about my mother. The door of the house has a small lock and a large lock, the large lock has more power and is a cross hole. Mom has no problem opening a small lock, but every time she wants to open a big lock, she doesn't know how to open it. Lin had told her mother what the trick was, but she couldn't learn it. Therefore, Lin thinks it is a very interesting phenomenon.

At 19:25, Lin returned to room 105, and when he closed the glass window, he saw the security door on the anti-theft net, and there was an ordinary black iron lock on the door. Maybe Mr. Deng or Huotou have a layer of concern, everyone can not use the key properly after getting it, but it will add unsafe factors, so it will only be sent to everyone when it is necessary to go through a security check.

Lin once came up with the idea of buying a machine with keys, so that when the master of the south gate was no longer in the business of matching keys, someone would be able to do it. Just thinking about it, he doesn't expect such a situation to happen in this life. However, there is money to buy a piece of equipment, and it will be enough to find a master to do it when the time comes.

At 20 o'clock, I returned home for dinner, and my mother's fried yuba was put on more light soy sauce, so the color was very good-looking, the smell was a little less divergent, the salty taste was appropriate, and the raw and cooked was suitable. The other bowl was green vegetable soup, and Lin felt that the ginger flavor was something he was not used to, because Lin had been suffering from chronic inflammation in his throat, so he liked a light diet. However, the parents have a weak constitution, so they need to use ginger to activate qi and blood, and the so-called difficult to reconcile is also the case.

At 20:30, Lin took a bath, although there was a bath bomb in the bathroom, he didn't use it, because he felt that the light was too bright and hurt his eyes. After washing, I went on the Internet, and there was basically no one chatting on QQ, so I rested. After the lights are darkened, the white light is less noticeable, and the angels may have taken a holiday to rest. Soon the environment inside the house became dark, all the brilliance was put away, and Lin slowly lost his waking consciousness and melted into sleep.

In the dream, Lin came to Africa, he and his college classmates took the bus to buy an instrument, the bus and many people on the road are black-skinned young people, both men and women are very slim and healthy, and then Lin's state is not very good, the car has been stationed, so he quickly reminded his companions to get off the bus and rush back. In such a dream, Lin felt very worried. In fact, he had no idea what equipment to buy and where he was going, so he didn't need to worry about it. Maybe he was born to worry about people, so he can only be happy.