Bitcoin toss
Publish: 2021-03-27 15:37:57
1. The most direct cause of the crash: the bitcoin exchange MT GOx was attacked by hackers, causing a lot of panic selling of bitcoin by investors
in addition, the underlying reason is that the world does not recognize the monetary payment property of bitcoin, but regards it as an investment commodity similar to gold, and even has large-scale capital participation in speculation.
in addition, the underlying reason is that the world does not recognize the monetary payment property of bitcoin, but regards it as an investment commodity similar to gold, and even has large-scale capital participation in speculation.
2. Manual shooting skills of SLR camera
1. Take close-up pictures of small still objects, such as flowers, birds and insects:
use AV file, the aperture should be f5.6 or below, the focal length should be more than 50, and try to shoot within 1m to make the background virtual
if the light is good, ISO 100, if the light is bad, ISO should be within 400<
2. Shooting people:
basically use a large aperture (within f5.6) and a focal length of more than 50 mm. The shooting distance depends on the whole body, half body and big head, which makes the background virtual. Use AV file
good light, iso100, bad light, iso400
people in motion use tracking to reflect the sense of motion (see the shooting of moving objects below for details)<
3. Shooting:
AV file, use the appropriate aperture, above F8, the focal length is arbitrary, but generally the wide-angle end has distortion, use it as appropriate<
4. Shooting night scene:
upper tripod, AV gear, custom white balance or incandescent lamp, aperture above F8, small aperture can make the light proce starlight effect, use the reflector pre rising function to rece the vibration caused by the reflector lifting after pressing the shutter; And cover the viewfinder with the square cover on the strap to prevent stray light from entering from the back and affecting the image quality; ISO 200, as far as possible to make the exposure time longer, so that some people who have no intention to walk away from the screen disappear, leaving no traces, clean the scene
for example, when taking a square with people coming and going, you can use a very small aperture of about F20 and iso100. In this way, the exposure time will be very long, and the moving figures will not stay in the photos! The square will be clean<
5. Shooting fireworks:
using shutter line and B shutter, you can shoot multiple fireworks overlapping effect<
6. Shooting things:
when the light is good: AV, the aperture size should be handled according to the circumstances; Large depth of field can be obtained by using aperture above F8, and shallow depth of field can be obtained by using small aperture
if you want to have a very dynamic effect, you can use the TV gear, the shutter is about 1 / 30, when you focus and press the shutter, the lens will follow the object at an appropriate speed, which will proce a very dynamic effect
poor lighting: we can only handle it according to our own discretion, plus use the follow-up camera<
7. Shooting running water or fountain:
using TV and about 1 / 50 shutter speed, you can shoot Satin effect. If you use too fast shutter speed, the fountain will shoot discontinuous water drops<
8. Taking photos at night:
use tripod to adjust white balance, and automatically or custom white balance; iso100-400 AV gear, aperture about F8, use slow synchronous flash, rear curtain flash mode; At this time, the flash will flash twice, press the shutter to flash once, and flash again before the end of exposure, so don't leave before flashing twice
in this way, the characters can be clear and the background neon is beautiful, so that the background will not be too dark e to insufficient exposure< No matter what you shoot, don't shoot with the maximum aperture unless you want to keep a safe shutter
2. Please use the aperture of F8 ~ F11 as much as possible when shooting scenery
3. The maximum aperture can be reced by 1-2 levels when taking close-up of people and still life
4. The safety shutter should be controlled above the reciprocal of the focal length as far as possible. The wide-angle shutter should also be more secure at more than 1 / 30 second. If the shutter is insufficient, please increase the aperture or ISO<
metering method:
1. Don't measure the light to the sky or the darkest place. Go to the middle value
2. According to your subject matter, make good use of the metering mode (balance metering, point metering, central key metering...)
3. If the light measurement is not accurate, please use AE lock to expose and lock the gray things around you before shooting
4. Try not to measure the light on white or black objects, otherwise remember to rece eV for black and increase eV for white<
EV is exposure compensation.
exposure compensation is also an exposure control method, which is commonly used in ± If the ambient light source is dim, the exposure value (such as + 1eV, + 2eV) can be increased to highlight the clarity of the picture
most of the small digital cameras adjust the exposure compensation through the menu
in the process of shooting, if you press half of the shutter, the LCD will display pictures similar to the final effect picture, focusing and exposure will start. The exposure at this time is exactly the exposure of the final picture. If the picture is obviously bright or dark, it means that the automatic metering accuracy of the camera has a large deviation, and the exposure compensation should be enforced, but sometimes the brightness displayed ring shooting is different from the actual shooting result. Digital camera can browse the picture immediately after shooting, at this time, you can more accurately see the brightness of the picture, there will be no difference. If the shooting result is obviously bright or dark, it is necessary to re shoot and force the exposure compensation
the shooting environment is dim, and the brightness needs to be increased. When the flash cannot work, the exposure can be compensated and the exposure can be increased appropriately. For exposure compensation, if the photo is too dark, increase the EV value. Every 1.0 increase in EV value is equivalent to doubling the amount of light intake. If the photo is too bright, decrease the EV value. Every 1.0 decrease in EV value is equivalent to doubling the amount of light intake. The compensation interval can be adjusted in 1 / 2 (0.5) or 1 / 3 (0.3) units according to different cameras
when the white object to be photographed looks gray or not white enough in the photo, it is necessary to increase the exposure. In short, "the whiter the object is, the more white the object is." this seems to run counter to the basic principles and habits of exposure. In fact, it is not. This is because the main body of the camera is often the center of the light measurement, and the White main body will make the camera mistakenly think that the environment is very bright, As a result, the exposure is insufficient, which is also a common problem for most beginners
because the shutter time or aperture size of the camera is limited, it is not always able to reach the 2eV adjustment range, so the exposure compensation is not omnipotent, and it may still be underexposed in too dark environment. At this time, it is necessary to consider cooperating with the flash or increasing the ISO sensitivity of the camera to improve the brightness of the picture
generally speaking, the smaller the brightness contrast of the scene, the more accurate the exposure, otherwise, the larger the deviation. The grade of the camera is high and low. If the grade is high, the metering is more accurate, and if the grade is low, the deviation will be increased. If it is a traditional camera, the tolerance of film is relatively large, and the exposure deviation will not have a big problem within a certain range, but the CCD tolerance of digital camera is relatively small, and slight exposure deviation may affect the overall effect
in a word, the adjustment of exposure compensation is determined by experience and sensitivity to color. Users must compare the image quality, clarity, restoration degree and noise size under different exposure compensation to get the best picture
note:
the aperture in Canon's manual refers to the F value. The larger the aperture, the greater the depth of field
generally speaking, aperture refers to aperture, which is inversely proportional to F. the larger the aperture, the smaller the depth of field
AV -- aperture priority auto exposure
TV -- shutter priority auto exposure
AE auto exposure
AF auto focus
AF-S -- single auto focus, the same as saf. The opposite is continuous autofocus
MAF - monitor AF, which can shorten the focusing time. The camera will adjust the focus before half pressing the shutter button, so that you can compose with the adjusted focus. When the shutter button is half pressed and AF locking is completed, the focus will be locked
ev - exposure value, which is usually used in exposure compensation
ISO sensitivity. Each difference of sensitivity is equivalent to the corresponding exposure value of aperture or shutter
brother, if you have time, go to ZhongGuanCun video forum and see the forum.
1. Take close-up pictures of small still objects, such as flowers, birds and insects:
use AV file, the aperture should be f5.6 or below, the focal length should be more than 50, and try to shoot within 1m to make the background virtual
if the light is good, ISO 100, if the light is bad, ISO should be within 400<
2. Shooting people:
basically use a large aperture (within f5.6) and a focal length of more than 50 mm. The shooting distance depends on the whole body, half body and big head, which makes the background virtual. Use AV file
good light, iso100, bad light, iso400
people in motion use tracking to reflect the sense of motion (see the shooting of moving objects below for details)<
3. Shooting:
AV file, use the appropriate aperture, above F8, the focal length is arbitrary, but generally the wide-angle end has distortion, use it as appropriate<
4. Shooting night scene:
upper tripod, AV gear, custom white balance or incandescent lamp, aperture above F8, small aperture can make the light proce starlight effect, use the reflector pre rising function to rece the vibration caused by the reflector lifting after pressing the shutter; And cover the viewfinder with the square cover on the strap to prevent stray light from entering from the back and affecting the image quality; ISO 200, as far as possible to make the exposure time longer, so that some people who have no intention to walk away from the screen disappear, leaving no traces, clean the scene
for example, when taking a square with people coming and going, you can use a very small aperture of about F20 and iso100. In this way, the exposure time will be very long, and the moving figures will not stay in the photos! The square will be clean<
5. Shooting fireworks:
using shutter line and B shutter, you can shoot multiple fireworks overlapping effect<
6. Shooting things:
when the light is good: AV, the aperture size should be handled according to the circumstances; Large depth of field can be obtained by using aperture above F8, and shallow depth of field can be obtained by using small aperture
if you want to have a very dynamic effect, you can use the TV gear, the shutter is about 1 / 30, when you focus and press the shutter, the lens will follow the object at an appropriate speed, which will proce a very dynamic effect
poor lighting: we can only handle it according to our own discretion, plus use the follow-up camera<
7. Shooting running water or fountain:
using TV and about 1 / 50 shutter speed, you can shoot Satin effect. If you use too fast shutter speed, the fountain will shoot discontinuous water drops<
8. Taking photos at night:
use tripod to adjust white balance, and automatically or custom white balance; iso100-400 AV gear, aperture about F8, use slow synchronous flash, rear curtain flash mode; At this time, the flash will flash twice, press the shutter to flash once, and flash again before the end of exposure, so don't leave before flashing twice
in this way, the characters can be clear and the background neon is beautiful, so that the background will not be too dark e to insufficient exposure< No matter what you shoot, don't shoot with the maximum aperture unless you want to keep a safe shutter
2. Please use the aperture of F8 ~ F11 as much as possible when shooting scenery
3. The maximum aperture can be reced by 1-2 levels when taking close-up of people and still life
4. The safety shutter should be controlled above the reciprocal of the focal length as far as possible. The wide-angle shutter should also be more secure at more than 1 / 30 second. If the shutter is insufficient, please increase the aperture or ISO<
metering method:
1. Don't measure the light to the sky or the darkest place. Go to the middle value
2. According to your subject matter, make good use of the metering mode (balance metering, point metering, central key metering...)
3. If the light measurement is not accurate, please use AE lock to expose and lock the gray things around you before shooting
4. Try not to measure the light on white or black objects, otherwise remember to rece eV for black and increase eV for white<
EV is exposure compensation.
exposure compensation is also an exposure control method, which is commonly used in ± If the ambient light source is dim, the exposure value (such as + 1eV, + 2eV) can be increased to highlight the clarity of the picture
most of the small digital cameras adjust the exposure compensation through the menu
in the process of shooting, if you press half of the shutter, the LCD will display pictures similar to the final effect picture, focusing and exposure will start. The exposure at this time is exactly the exposure of the final picture. If the picture is obviously bright or dark, it means that the automatic metering accuracy of the camera has a large deviation, and the exposure compensation should be enforced, but sometimes the brightness displayed ring shooting is different from the actual shooting result. Digital camera can browse the picture immediately after shooting, at this time, you can more accurately see the brightness of the picture, there will be no difference. If the shooting result is obviously bright or dark, it is necessary to re shoot and force the exposure compensation
the shooting environment is dim, and the brightness needs to be increased. When the flash cannot work, the exposure can be compensated and the exposure can be increased appropriately. For exposure compensation, if the photo is too dark, increase the EV value. Every 1.0 increase in EV value is equivalent to doubling the amount of light intake. If the photo is too bright, decrease the EV value. Every 1.0 decrease in EV value is equivalent to doubling the amount of light intake. The compensation interval can be adjusted in 1 / 2 (0.5) or 1 / 3 (0.3) units according to different cameras
when the white object to be photographed looks gray or not white enough in the photo, it is necessary to increase the exposure. In short, "the whiter the object is, the more white the object is." this seems to run counter to the basic principles and habits of exposure. In fact, it is not. This is because the main body of the camera is often the center of the light measurement, and the White main body will make the camera mistakenly think that the environment is very bright, As a result, the exposure is insufficient, which is also a common problem for most beginners
because the shutter time or aperture size of the camera is limited, it is not always able to reach the 2eV adjustment range, so the exposure compensation is not omnipotent, and it may still be underexposed in too dark environment. At this time, it is necessary to consider cooperating with the flash or increasing the ISO sensitivity of the camera to improve the brightness of the picture
generally speaking, the smaller the brightness contrast of the scene, the more accurate the exposure, otherwise, the larger the deviation. The grade of the camera is high and low. If the grade is high, the metering is more accurate, and if the grade is low, the deviation will be increased. If it is a traditional camera, the tolerance of film is relatively large, and the exposure deviation will not have a big problem within a certain range, but the CCD tolerance of digital camera is relatively small, and slight exposure deviation may affect the overall effect
in a word, the adjustment of exposure compensation is determined by experience and sensitivity to color. Users must compare the image quality, clarity, restoration degree and noise size under different exposure compensation to get the best picture
note:
the aperture in Canon's manual refers to the F value. The larger the aperture, the greater the depth of field
generally speaking, aperture refers to aperture, which is inversely proportional to F. the larger the aperture, the smaller the depth of field
AV -- aperture priority auto exposure
TV -- shutter priority auto exposure
AE auto exposure
AF auto focus
AF-S -- single auto focus, the same as saf. The opposite is continuous autofocus
MAF - monitor AF, which can shorten the focusing time. The camera will adjust the focus before half pressing the shutter button, so that you can compose with the adjusted focus. When the shutter button is half pressed and AF locking is completed, the focus will be locked
ev - exposure value, which is usually used in exposure compensation
ISO sensitivity. Each difference of sensitivity is equivalent to the corresponding exposure value of aperture or shutter
brother, if you have time, go to ZhongGuanCun video forum and see the forum.
3. The harm is still great
Enterprise computers can go to Tencent smart security
to apply for Tencent Yudian, and then keep it open all the time
in this way, viruses can be prevented from entering the computer
Enterprise computers can go to Tencent smart security
to apply for Tencent Yudian, and then keep it open all the time
in this way, viruses can be prevented from entering the computer
4.
According to finance magnates, Amazon's digital currency project will first start in Mexico, and then expand to Brazil and India. It is reported that the digital currency project will completely focus on payment services in emerging markets. What is the impact of digital currency
What is the impact of digital currencycompared with bitcoin, which appears more in the mass media, digital currency has its particularity. Bitcoin is just a kind of digital encryption asset, which lacks market supervision. The digital currency of the central bank has government credit endorsement, is legal currency, and can track money laundering and other financial criminal activities by using big data of transaction traces. China's WeChat and Alipay are relatively well-developed electronic payment means, but the state is still committed to exploring digital money research and development, and has taken the lead in the world. Shenzhen Luohu issued 10 million yuan digital currency red envelope and Suzhou & lt; Double Twelve & quot; Shopping to issue 20 million yuan of digital currency red envelopes is a very cutting-edge exploration{ RRRRR}
5. Bitcoin is down 12% again! Recently, the bitcoin market is extremely chaotic
among the characteristics of bitcoin, the first is decentralization, with no central bank. It's easy to be used to launder money. In addition, bitcoin comes from the use of computers to dig. It does not have gold as a guarantee, nor does it have national reputation as a guarantee
looking at the trend, paper money will be replaced sooner or later, which is the electronic currency issued by the state
bitcoin is also fried, which may be the Dutch tulip of that year
our country has closed the bitcoin trading website, which is the most obvious statement. Other blockchain currencies are constantly being investigated
as investors, we should know clearly that all kinds of investment procts are up and down, and now they are really high. What's more, things with no value, or things with virtual height, don't last long
I hope you pay attention to risks. Rational investment.
among the characteristics of bitcoin, the first is decentralization, with no central bank. It's easy to be used to launder money. In addition, bitcoin comes from the use of computers to dig. It does not have gold as a guarantee, nor does it have national reputation as a guarantee
looking at the trend, paper money will be replaced sooner or later, which is the electronic currency issued by the state
bitcoin is also fried, which may be the Dutch tulip of that year
our country has closed the bitcoin trading website, which is the most obvious statement. Other blockchain currencies are constantly being investigated
as investors, we should know clearly that all kinds of investment procts are up and down, and now they are really high. What's more, things with no value, or things with virtual height, don't last long
I hope you pay attention to risks. Rational investment.
6. At present, the trading platforms for short selling are: 796 exchange, huoyuan.com; The purpose of shorting is to earn more bitcoin, but if the increment of bitcoin is not enough to make up for the loss of falling price, then it is not profitable in general. For example, if you hold 100 bitcoins at the price of 1000 yuan and earn 800 bitcoins when the price drops to 100 yuan by shorting, a total of 900 bitcoins will be earned. Then the unprecedented book value is 100000 yuan, and the book value after shorting is 90000 yuan, which is still a loss on the whole
2. Hold enough bitcoin and RMB first, open different accounts on the trading platform, and arbitrarily raise or lower the transaction price of bitcoin through two anonymous accounts operating at the same time and trading with each other. For example, two accounts set the same quantity and price, and press the buy and sell operation at the same time in the same second to complete the process of transferring from the left pocket to the right pocket. Of course, the trading volume of this sell-off should be large enough and frequent enough to cause panic in the market and drive down the market price. At the same time, use other accounts to build positions at a high level, and make more bitcoin by shorting to make profits
3. If you have enough energy, you can mobilize the media to continuously release negative news and news, and also cause panic and sell-off in the market. For example, some famous economists, such as Chen Zhiwu and Lang Xianping, were invited to make some comments on shorting bitcoin. In addition to the speculation on microblog, some big V's were invited to forward more. As a result, market panic was formed and natural prices fell
Author: anonymous user
link: https://www.hu.com/question/22102397/answer/20302099
source: Zhihu
the right belongs to the author. For commercial reprint, please contact the author for authorization. For non-commercial reprint, please indicate the source.
2. Hold enough bitcoin and RMB first, open different accounts on the trading platform, and arbitrarily raise or lower the transaction price of bitcoin through two anonymous accounts operating at the same time and trading with each other. For example, two accounts set the same quantity and price, and press the buy and sell operation at the same time in the same second to complete the process of transferring from the left pocket to the right pocket. Of course, the trading volume of this sell-off should be large enough and frequent enough to cause panic in the market and drive down the market price. At the same time, use other accounts to build positions at a high level, and make more bitcoin by shorting to make profits
3. If you have enough energy, you can mobilize the media to continuously release negative news and news, and also cause panic and sell-off in the market. For example, some famous economists, such as Chen Zhiwu and Lang Xianping, were invited to make some comments on shorting bitcoin. In addition to the speculation on microblog, some big V's were invited to forward more. As a result, market panic was formed and natural prices fell
Author: anonymous user
link: https://www.hu.com/question/22102397/answer/20302099
source: Zhihu
the right belongs to the author. For commercial reprint, please contact the author for authorization. For non-commercial reprint, please indicate the source.
7. Do you mean to run for money with farmers? To put it bluntly, it's good to sell game currency with practice. I have friends who do it. The first thing to solve is credibility. That is to say, how to make others believe you and buy your game currency first or the money first. If you are a dreamy player, it's a good start. If you don't play, it's not a good start. If you hire a farmer, I'd like to give you a suggestion, that is, don't make money on a tree. You can talk about westward journey, world of Warcraft and so on at the same time; Do you mean to run for money with farmers? To put it bluntly, it's good to sell game currency with practice. I have friends who also do this. The first thing to solve is credibility. That is to say, how to let others believe you and buy your money is that you have a future, but you must have a complete system. First of all, get some people from Henan, and then start to operate. First, it will cost several hundred yuan a month, and then it will guarantee food and housing. Of course, you have to have some funds first. About 60000 or 70000, find a promising area in the early stage, and then start to practice. When it's high, you can run darts to take the plot. First of all, you have to rent a machine. Don't buy because you don't have enough money. It's better if you have an Internet bar. You need to find a reputable currency trading website, so you can't do anything you want to do.
it's a question of whether you play the game currency first or he pays first. If you're a dreamy player, it's a good start. If you don't play, it's not a good start. If you hire a farmer, I'll give you a suggestion, that is, don't make money in a tree, talk about westward travel World of Warcraft and so on can be done at the same time. And you have to have a whole system. First of all, get some people from Henan, and then start to operate. First, it will cost several hundred yuan a month, and then it will guarantee food and housing. Of course, you have to have some funds first. About 60000 or 70000, find a promising area in the early stage, and then start to practice. When it's high, you can run darts to take the plot. First of all, you have to rent a machine. Don't buy because you don't have enough money. It's better if you have an Internet bar. You need to find a reputable currency trading website, so everything is not open to the line.
it's a question of whether you play the game currency first or he pays first. If you're a dreamy player, it's a good start. If you don't play, it's not a good start. If you hire a farmer, I'll give you a suggestion, that is, don't make money in a tree, talk about westward travel World of Warcraft and so on can be done at the same time. And you have to have a whole system. First of all, get some people from Henan, and then start to operate. First, it will cost several hundred yuan a month, and then it will guarantee food and housing. Of course, you have to have some funds first. About 60000 or 70000, find a promising area in the early stage, and then start to practice. When it's high, you can run darts to take the plot. First of all, you have to rent a machine. Don't buy because you don't have enough money. It's better if you have an Internet bar. You need to find a reputable currency trading website, so everything is not open to the line.
8. The hot blooded Lake studio used to be able to compare dishes now
to tell you the truth, there is no good future
the normal standard of a general studio is 6 computers
two knives and three doctors use Jingjiu to increase Peiyuan to 3 turns at first
then two doctor groups and one doctor GF or if you don't think it's good enough, you can eat 5 colors with three knives and sell it with another computer. This is the studio
but now there are too many hot-blooded river lake coins Generally, if you want to work as a studio, you have to focus on the new area.
if you go up in the open area, you can sell it for 3 to 4 months at a good price.
after that, you have to consider going to the new area again. However, in the end, the number in this area has generally reached 4 turns (doctors, the knife has always been kept below 74, and they pay more), so you can sell the number! This is the operation process of the studio! Generally speaking, there is not much development. Consider changing the game!
to tell you the truth, there is no good future
the normal standard of a general studio is 6 computers
two knives and three doctors use Jingjiu to increase Peiyuan to 3 turns at first
then two doctor groups and one doctor GF or if you don't think it's good enough, you can eat 5 colors with three knives and sell it with another computer. This is the studio
but now there are too many hot-blooded river lake coins Generally, if you want to work as a studio, you have to focus on the new area.
if you go up in the open area, you can sell it for 3 to 4 months at a good price.
after that, you have to consider going to the new area again. However, in the end, the number in this area has generally reached 4 turns (doctors, the knife has always been kept below 74, and they pay more), so you can sell the number! This is the operation process of the studio! Generally speaking, there is not much development. Consider changing the game!
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