400pe computing power
eth is only 32mh / s, 1070 has 40mh / s. Many people say that 1080ti can't pull up the computing power because of the high delay of gddr5x video memory. As expected, it's better to mine with a card. People on the Internet say that 480 can have 65mh / S computing power
Zec, 724sol / s, nearly three 1060 3G, the total price is more expensive than three 1060 2K soft coins. However, compared with the short supply a-card rx4808g, the price of three cards is less than 5K, and the computing power is 900 + sol / s, but it's useless if there is a price but no market
it's too wasteful to use this card for mining. It's just for fun and can't afford to hurt.
when Leyte coin was born, its founder claimed that Leyte coin was not suitable for AISC. Now, Leyte coin has fallen sharply, which has nothing to do with mining machinery manufacturers
I guess it's bitcoin miner. Miner with 400g computing power is very common. The mainstream Avalon 3 single-mode group 290g on the market, the price is only about 1800. The price of ant s3440g is 2550 yuan.
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
< EM >
< / EM >
the mining pool is the necessary infrastructure for the exploitation of P2P cryptography virtual currency such as bitcoin (digital currency). It is generally an open team mining server. Its significance is to improve the stability of bitcoin mining and stabilize the miners' salary. At present, the most powerful mining pools in the world are f2pool, antpool, BW pool, BTCC pool and bitfury. Except for bitfury, the rest are from China
with more and more people participating in mining, the computing power of bitcoin network is rising, and it is difficult for a single device or a small amount of computing power to dig bitcoin again. At this time, the mine pool was born
operation principle of bitcoin mine pool
the ore pool is responsible for information packaging, and the access mine is responsible for competing for bookkeeping rights
e to the collection of the computing power of many miners, the computing power of the mine pool accounts for a large proportion, and the probability of digging bitcoin is higher
for example
suppose 1 million people participate in bitcoin mining, and the whole network has 400p computing power, of which 90% of the miners have less than 1p (1000t) computing power. If a 1t miner is put into operation, it will account for 1.400000 of the whole network's computing power. Theoretically, every 400000 10 minutes can dig a block, that is, only 7.6 years can dig a block, and then get 50 bitcoins at a time
then, if I find another 9 miners with 1t dynamometer and reach an agreement, we will have a total of 10 people, and any one of them will be divided equally according to the proportion of each person's computing power, then we are a whole. With a total of 10t computing power, we can dig a block in 0.76 years on average, Then we have five bitcoins mined in 0.76 years. What if we organize 100 people, 1000 people, 10000 people or even 100000 people
if it is 100000 people, I can dig one block in 100 minutes on average. As a member of the team, my income will tend to be stable
this is the basic principle of the mine pool, that is, everyone forms a team to mine bitcoin, you can refer to the "buy together" in the lottery
of course, the above is only a simple description of the basic principles and properties of the ore pool, and the actual situation will be very complicated
the ore pool is a fully automatic mining platform, that is, the ore machine is connected to the ore pool to provide computing power and obtain profits
the bitcoin reward generated by mining in the mine pool will be distributed according to the proportion of each miner's contribution to computing power
compared with single mining, adding to the ore pool can obtain more stable income
I hope this answer will help youThe eight treasures of the world artificial intelligence conference 2020 are respectively Microsoft silica project, the first "intelligent shelter hospital" solution in China, ABB's Yumi al arm robot, Huawei atlas 900 training cluster, Uber Walker robot, IBM artificial intelligence debate system, quadruped robot opencat, intelligent grazing robot
1. Microsoft silica project
is located in the "Ai pilot area", which makes it possible to store a large amount of data in glass. With the help of this carrier, up to 75.8g of data can be stored in a 7.5 square centimeter glass sheet
2. The first "intelligent shelter hospital" solution in China. During the COVID-19 prevention and control period, more than 30 intelligent robots such as cleaning, disinfection, security and so on demonstrated their skills in the Hubei Wuchang shelter hospital. p> 3. ABB's Yumi al arm robot is on display in the "Ai + instry" section. This time, Yumi brings intelligent medical solutions covering the whole chain of hospitals, from biotechnology, gene detection, pharmacy to logistics. The audience can also listen to the growth story of human-computer cooperation in the past five years 4. Huawei atlas 900 training cluster is located in the exhibition area of "Ai + basic technology". Atlas 900 is integrated by thousands of shengteng 910ai processors, and its computing power is equivalent to 500000 computers, representing the peak of global computing power with powerful computing power, Atlas 900 can help researchers engage in weather forecasting, oil exploration, exploring the mysteries of life, accelerating the commercial process of automatic driving, etc., which will benefit the world as "made in China" in the future 5. You must choose Walker robot you must choose Walker robot appeared in "Ai + ecation" exhibition area. The robot integrates artificial intelligence and robot core technology, with 36 high-performance servo joints and omni-directional perception systems of force sense, vision, hearing and balance, achieving breakthroughs in whole body motion control, flexible walking in complex terrain, self balance, hand eye coordination, visual recognition, intelligent and safe interaction, etc 6. IBM AI debate system will participate in the selection of sail award. Debate is a subjective art form and skill. It is human language. IBM artificial intelligence debate system is recognized as one of the major challenges in the field of AI. In the future, more people will live in social media space and fragmented time, and the system will help people make more intelligent decisions 7. Four legged robot opencat the four legged robot opencat developed by petroi, an entrepreneurial team from Silicon Valley, made its debut in China in the "Ai instry ecosystem". Small body has super brain, keen perception and activity ability, human-computer interaction, automatic balance, flexible obstacle avoidance and other abilities. In addition, bittle, petoi's second-generation proct, will also be launched in the world 8. Intelligent grazing robot intelligent grazing robot is a major special achievement of agricultural work in Tibet Autonomous Region, and this is also the first time. This proct solves the problem of cattle survival rate that herdsmen are most concerned about, including timely treatment and targeted driving of Yaks in the early stage of disease, which will comprehensively improve the economic benefits of herdsmen
first check the density of various materials, and then calculate the volume of the materials you want to calculate with the computer, and then convert it into the density of the same unit, and then convert the weight into kg, such as the density of water is 1, such as the weight of each cubic meter of water. 1 * 1 * 1m is one cubic meter, which is equal to 100 * 100 * 100cm * 1g / cm = 1000000g / 1000 = 1000kg, that is, one ton
another example is a piece of aluminum plate 600 * 400 * 20, weight 60 * 40 * 2 * 2.7 = 12960g / 1000 = 12.96kg.
got it, I hope it can help you