Can bitcoin excavators be exported to the United States

1.

1、 mining principle

at the beginning, we could dig bitcoin with the computer CPU. The founder of bitcoin, Nakamoto Tsung, g out the world's first creation block with his computer CPU. However, the era of CPU mining has long passed, and now bitcoin mining is the era of ASIC mining and large-scale cluster mining

looking back on the mining history, bitcoin mining has gone through the following five times: CPU mining → GPU mining → FPGA mining → ASIC mining → large-scale cluster mining, The mining speed changes are as follows:

CPU (20mhash / s) → GPU (400mhash / s) → FPGA (25ghash / s) → ASIC (3.5tash / s) → large scale cluster mining (3.5tash / s * x)

mining speed, which is called computing power in professional terms, that is, the ability of computer to generate hash collisions per second. In other words, how many hash collisions can our miner do per second is the calculation force. Computing power is the ability to dig bitcoin. The higher the computing power, the more bitcoin you dig, the higher the return

in the world of bitcoin, a data block is recorded about every 10 minutes. All mining computers are trying to package the data block and submit it, and the person who successfully generates the data block will get a bitcoin reward. Initially, bitcoin rewards of 50 bitcoins could be generated about every 10 minutes. But the payment is halved every four years, and now the bitcoin network can generate 25 bitcoins every 10 minutes

to successfully generate data blocks, miners need to find the effective hash value. To get the correct hash value, there is no shortcut. You can only guess. The process of guessing is the process of computer random hash collision. If you guess correctly, you will get bitcoin

Mining method: from a miner to a large-scale mine, you need to prepare a miner, a computer that can connect to the Internet, an AUC, a raspberry pie, power supply and all kinds of connecting lines, etc. The connection order of various devices is network cable - & gt; Raspberry pie - & gt; Microusb cable - & gt; AUC-> 4Pin cable - & gt; Mining machine and power supply

< EM > Figure 3: Mine Map (scale of tens of thousands of mining machines) < / EM >

nowadays, the profit space of small and medium-sized absenteeism who take one mining machine home or deploy a small family workshop (dozens of mining machines) is very limited, and the mining instry is graally concentrating on enterprises and teams with low-cost power resources and professional deployment ability

there are many factors that affect the mining revenue, such as the performance and power consumption of mining machinery, the computing power and difficulty of the whole network, the deployment and operation and maintenance capacity of the mine, the availability of low-cost electricity resources, and the currency price and policy guidance, etc. At present, excellent mining enterprises have the ability of chip research and development, a lot of computing power, professional mine deployment and operation experience, etc. in the future, resources and computing power will be more and more concentrated in these mining enterprises

2. Mine pool

in addition to the above equipment, you also need a necessary tool - mine pool. The function of the mine pool is to gather a large amount of mineral computing power, increase your probability of getting bitcoin, and at the same time, distribute your future bitcoin income to your account in advance

the simple explanation is as follows: now the bitcoin network generates a block every 10 minutes, which contains 25 bitcoins. Suppose there are 1W people in the world participating in mining, then in these 10 minutes, only one lucky person has taken these 25 bitcoins, and the others have nothing. The principle of the mine pool is that everyone mines in teams and distributes according to the agreed distribution method, so that the income of the miners' bitcoin tends to be stable and the risks of the miners are reced. Let's take the most common PPS allocation method as an example. Suppose that your computing power is 10t, and the computing power of the whole mine pool is 100t. Your computing power accounts for 1 / 10 of the total computing power of the mine pool. Suppose that the mine pool can generate 10 bitcoins a day, then you can get 1 bitcoin a day

3. Cloud computing power

in reality, the supply of mining machines often exceeds the demand, and at the same time, the delivery of mining machines needs a long waiting period. Miner installation, commissioning, maintenance and other processes are very complex, which requires a lot of energy. Miners have to enre the noise and heat of miner. For miners, the biggest cost is not these, but the high electricity charges consumed by mining. The profit space of small and medium-sized miners is getting smaller and smaller, even negative

Mining income and risk mining income can be calculated by the following formula:

Mining income = generated bitcoin * currency price - mining machinery cost - electricity fee - custody fee

if you are just a small miner, generally you only need to dect mining machinery cost and electricity fee

Mining risks are as follows:

< UL >

at present, the number of bitcoin is less than 4.5 million. If we do not issue additional bitcoin, the price of bitcoin will fluctuate, and the price callback will lead to the extension of the payback cycle

mining difficulty improvement at present, our machines can meet the market demand

the risk of power outage

< UL >

< EM >
< / EM >

2. Foreign countries need to do in the inspection, and then apply for import license on the line, looking forward to the joint fine

3. IBM and bitcoin are almost virtual currencies. If they are valuable, they are worthless. It is not recommended to invest in this kind of virtual currency, so as not to be cheated by criminals
it is suggested to invest in the spot form of yellow / gold / crude oil. Yellow / gold has always maintained its value, and crude oil as war savings can not go anywhere. Recently, the market has fluctuated a lot. It's still easy to make money.

4. The mining machine of bitcoin is actually the computer equipment in our life. However, e to the special conditions of bitcoin proction, most of them are equipped with professional mining chips and work in the way of burning video card. Therefore, the mining machine is required to have good ventilation and heat dissipation and sufficient power resources.

5. No, the first one is the same as drugs can extract drugs. The second one is that although mining is meaningless, it is profitable for indivials to replace electricity bills. It's personal profits, but also pay the electricity bill. There is no violation of the law before there is no clear legal restriction

6. Naturally, the total computing power of five computers is 1000g. I don't think it's necessary to elaborate on this principle at all. If you combine it with the principle of computer operation, it will come to light naturally. However, it's better not to play with bitcoin at this time. Any new thing launched is that people who eat crabs first take advantage of it, and those who come later will have a good look at it. If you want to just play, if I don't say that you want to make money, it's not very interesting.

7. Think it's an excavator that can dig bitcoin away, naive!!!

8. The first step is to uninstall cad2007 program, then restart the computer, enter the safe mode, and use 360 security guard to clean up the malicious software
Step 3: find the original installation file of cad2007 and find the simplified Chinese version of AutoCAD2007 in the directory; Bin\ acadFeui\ Program Files\ Root\ Support\ Dfst.dll is deleted manually
finally, restart the computer and re install cad2007. The installation process prompts you "error 1308. Source file not found:...
this method is very good, I hope it can help you!