Although the cold winter has come, the mining machine will never
as a miner, I used graphics card very early and then butterfly machine. At present, I use Avalon's 220 miner and just received a new 180 ant miner. To tell you the truth, mining is not as simple as you think. Here I will list some practical difficulties you need to face in mining. If you find that some of these items can't be solved and overcome for the time being, don't rush to buy a miner, because from the moment you buy, if you can't mine, Then you will face a real loss
first, list the problems to face
1, be able to accept the noise - the noise of the mining machine is very loud, which is equivalent to that you put the air conditioner outside the room
1-1, strong hands-on ability - the noise can be controlled to a certain extent by adding water cooling, but it needs to be done by yourself. The installation process of water cooling is not as simple as the online tutorial. It needs to be extremely careful. The capacitor on the logic board is easy to touch, and it must be successful at one time. Once the refrigerant is added, the machine will have problems again, It would be disastrous to dismantle the water cooling system
1-2, conditional repair of the chip capacitor - in the process of water cooling installation, the capacitor is easy to fall off, these chip capacitors are very difficult to weld
2, you can set up the network - you can't just plug in the Internet cable! Need to understand the routing, know how to change the IP of the router, mining IP is fixed, according to mining IP to do settings
2-1, you can get a fixed IP address - if you are mining in a company, you can't set up a route, so you must have the condition to get a fixed IP, and then set up your own network through this IP
3. The environment of continuous power supply and continuous network - mining is a 24-hour business. Don't take it for granted that a meeting is OK in one day. Many companies will cut off power at midnight. This must be made clear
3-1. In low temperature environment, in addition to 24-hour continuous power supply, there should also be a relatively cold environment. In actual mining, we can clearly feel the importance of temperature for mining<
let's assume two scenarios,
in the company:
if your working environment is very quiet, it is not suitable, even if water cooling is installed. If you are a senior blue collar, in the workshop, do you have the conditions to set up the network and get a fixed IP? If you can't, give up
at home:
can you stand noise? Can tolerate to a certain extent
is it possible to install water cooling? It can be installed conditionally
is it possible to set up a network? There are also conditions to set up the network
is it warm in that room? Yes, but you can open windows on the second bedroom or balcony
is it possible to pull the wire and the wiring board in the balcony? No problem
congratulations, you can buy a miner to dig it up, but if one of them doesn't work, you need to think carefully before making a decision
the above-mentioned points should not be taken as unimportant or major problems. For example, it is necessary to have the conditions to install water cooling, for example, in a lower temperature environment, for example, to have a fixed IP
when the miner starts to operate and makes a rumbling sound, if you are in the company, you have to turn it off awkwardly. If you are at home, you need to figure out how to explain to your family or girlfriend that the noise will exist for 24 hours, and hope they don't mind
if your home is warm, your miner will never be able to achieve the highest computing power it can. You must accept it calmly, don't be depressed, it's useless to find the seller. Unless you open the window to let in the cold air, you will find that you and the miner are so out of place. That's why laomaozi is very fond of mining< Make complaints about mobile phone, br / > and if you work hard to move the mine to the company, you may think that the electricity charge is in the whole province. You can't get the mine to connect. Then you can only move the mine to home or sell it as a second-hand machine...
these words are typed word by word by me. I hope it can help you. You must find out whether you are qualified to do this at present. As for how to dig, it's a very simple thing: buy a miner, register an account on a mining website, Download a multibit to store the bitcoin you get, and link the miner to the network for power on, Set up the network, give it the fixed IP specified on the chassis, use the computer to access the IP, make some simple settings, and then wait for the receipt
what else can I ask you
- - talking about the mining cost of bitcoin -
the first thing to consider is the cost if you want to make money. If the profit is greater than the cost, it is worth doing. We all know how much bitcoin costs, so let's calculate the cost
1. Mining machine cost: the "number" of bitcoin is a problem-solving process, which can't be calculated by human brain alone. Therefore, mining people need to buy mining machines and keep calculating. The more mining machines, the stronger the computing power
2. Electricity charges: mining machines are big consumers of high power. How much electricity does it consume? Let's put it this way. At present, the electricity consumption of bitcoin and Ethereum mining has surpassed Jordan, Iceland, Libya and other small countries, ranking 71st among all countries and regions in the world. You want to cry when electricity is expensive
3. The rent of the place where the mining machine is placed: because the mining machine consumes a lot of electricity, the power supply load of ordinary residential buildings can not be guaranteed at all, so the mining must rent a commercial site separately, and the rent is much more expensive than that of ordinary residential buildings
4. Operation cost: in order to ensure the computing power, the high-power mining machine needs to work 24 hours, which requires someone to maintain it at any time. When the mining machine is in trouble, the cost of hiring someone is required; At the same time, the mining machine is very delicate. If it is too hot or too cold, the vegetables will be stopped. Therefore, the measures of cold air and cold water insulation are needed to help the mining machine run. This is another expense
5. Mining machine update cost: because bitcoin is becoming more and more difficult to dig, the machine that was able to dig a month ago may not be able to dig anything today, and the market will also launch mining machines with greater computing power. The original mining machine is not worth money immediately. If you want to maintain computing power, you need to buy mining machines again
the above bitcoin mining costs all have a marginal effect, that is, the larger the volume is, the lower the corresponding cost will be. Therefore, some super large mines have been built
bitcoin g in the mine will enter the mine pool and be distributed by all participants. Large mines will be built in places where labor and electricity are cheap, such as Venezuela, the legendary miner's paradise, or Iceland, where the climate is favorable and electricity is cheap
as for the cost, everyone will be different. Let's take a look at an average: in 2017, according to the data of elite fixtures, a research institution, Venezuela is the cheapest of 115 mining countries, which is 513 US dollars, while South Korea is the most expensive, which is 26170 us dollars
China's mining cost is US $3172, which is relatively low among 115 countries. However, the cost is an average value. Large mines with low electricity prices must be much lower. If you are a lone ranger, the cost will rise sharply
in a word, if you really want to make money by mining, first of all, unless you are rich enough to build a mine with thousands of machines, you'd better join a mine to dig together. Although you have to share the money, it's still appropriate in the long run because it can greatly rece costs and improve computing power
secondly, whether you dig by yourself or join the mine, you must choose the place with low electricity cost, and the city with abundant hydropower resources is preferred, because hydropower is the cheapest source of power generation in China at present.
in order to make students realize the importance of calculation, I first carried out an activity among students: let students collect the mistakes they often make in calculation, which can be carried out by each student himself or through group cooperation, and record the staggered questions after two weeks, including the reasons for the mistakes, It depends on who is looking for it seriously and who is looking for the wrong reason. When the students' enthusiasm is aroused, they shake off the problems:
(1) wrong reading, wrong ing and scribbling. 6 and 0, 1 and 7 are ambiguous
(2) when the column is vertical, the digits are not aligned
(3) do not draft when calculating
(4) one digit addition and subtraction calculation errors lead to errors in the whole question< There are two reasons for "carelessness" from the calculation errors of some students: one is that children's physical and psychological development is not mature enough, the other is that they have not formed good study habits. On the one hand, it is a natural growth process; on the other hand, it can be cultivated by corresponding methods. Therefore, while guiding students to analyze the reasons, it is necessary to highlight the cultivation of students' good learning habits, which is the key to improving their computing ability and the basic requirement of quality ecation< Second, cultivate students' good habit of calculation. Most of the mistakes in calculation are caused by careless, careless and scribbled writing. Therefore, a good calculation habit is the guarantee to improve the calculation ability. In the calculation training, students are required to do one look, two think, three calculate, four check
1. Look: it's serious. How can the result be correct if all the questions are copied wrong? Therefore, students are required to check with the original question or the previous formula in time when ing questions and calculating each step, so as to avoid ing wrong numbers or symbols. There are three points to be done: 1) check with the original question after ing the question; ② Check the numbers on the vertical type with those on the horizontal type; ③ Check the number in horizontal form with that in vertical form
2. When guiding students to do a calculation problem, they should not pick up a pen to do the calculation. They must first examine the problem, make clear what the problem should be calculated first and then, and whether there is a simple calculation method, then they can do the calculation. In addition, the calculation must be accurate first, and then fast
3. Calculation: to write and calculate carefully. The writing of assignments and exercises should be neat, not scribbled, and the format must be standardized. The writing of numbers, decimal points and operational symbols in the title should be especially standardized. There should be appropriate intervals between the numbers, and the vertical type on the draft should be aligned and organized. The calculation should be concentrated and not rush
4. After the calculation, we should first check whether the calculation method is reasonable; Secondly, check whether the numbers and symbols are copied wrong, and whether the decimal point is written wrongly or omitted; Thirdly, we should check and calculate every number and final result in the process of calculation. Therefore, it is an important way to cultivate good learning habits to prevent calculation errors and improve calculation ability< Third, to cultivate students' oral calculation ability and lay a solid foundation.
oral calculation is a calculation method that directly calculates the number by thinking and memory, which is an important part of calculation ability. Therefore, to improve students' calculation ability, we must lay a good foundation for oral calculation
1. In order to improve the accuracy and speed of students' oral arithmetic, I consciously ask students to memorize some special mathematical combinations according to their knowledge structure, such as sum is two numbers of whole ten and whole hundred (73 and 27, 98 and 2, etc.); The proct is two numbers (25) of the whole ten and the whole hundred × 4，125 × 8, etc.); The memory of these results is not only helpful to improve the accuracy of students' calculation, but also greatly improves the speed of students' calculation
2. Arrange exercises in each class. According to the teaching content and students' actual situation, each mathematics class chooses the appropriate time, arranges 3-5 minutes of oral arithmetic practice, and each student prepares a Book (daily practice of oral arithmetic). In this way, it is carried out for a long time, perseveres, and receives good results
3. For example: visual arithmetic training, listening arithmetic training, oral arithmetic, oral arithmetic games, "confrontation", "relay race" and so on, to improve students' adaptability< Fourth, strengthen the teaching of estimation. Estimation can cultivate students' sense of number, guide students to understand "operation" deeply, and help students check the correctness of calculation results. Estimation method can be used to locate the calculation results in advance and quickly determine the value range of calculation results, It can avoid mistakes caused by carelessness. Let the students look at the last digit of the result. If the indivial digits are 3 and 8, the sum of the indivial digits of the result must be 1, and the multiplication must be 4, such as 13 × In a word, the cultivation of students' computing ability should be carried out in the whole process of primary school mathematics teaching. We should not only strengthen the training of students' basic skills, but also pay attention to the targeted training of students. As long as we carefully study, constantly summarize and improve the work, and seriously dig out the ability factors in the calculation problems, the students' calculation ability will be improved.
For some people, buying a doll in a blind box is a game like process. When you buy your favorite doll, you will be pleasantly surprised. A complete set of dolls has a sense of accomplishment. An IP doll is the social language of a group. This is similar to the mentality of children going to the convenience store to buy quirky eggs. Everyone has a childlike innocence. However, when you see news headlines like "you can make 40 times as much money by frying the blind box", "you can make 100000 yuan a year by playing with the blind box", "players spend millions a year" and "lose all their money to buy the blind box", I think blind box is changing its flavor
(but many times, there is only one purpose, that is investment) blind boxes, dolls and sneakers are commodities with practical use value. Just like houses, they have become the targets of speculation under the promotion of some speculators. Scalpers and speculators enter the market with the dream of gold rush. Some young people see that it is profitable to participate in them, and the interests of real players are affected. They put forward the advocacy of "shoes should not be fried" and "children should not be fried", However, this can not stop the speculators who are moved by the wind
One day in June 1752, in the suburbs of Philadelphia, the United States, there were dark clouds, lightning and thunder. On a wide grassland, there were two people, an old man and a young man, flying kites there with great interest. All of a sudden, a flash of lightning split the clouds and drew the word "Zhi" in the sky. Then there was a thunder and the rain fell down. I saw the old man shouting: "William, stand in the thatched cottage over there and tighten the kite string."
at this time, the lightning lights up one by one, and the thunder goes up one by one. Suddenly William yelled, "Dad, look!" The old man looked in the direction of his son's finger, and saw that the taut hemp rope, which was originally smooth, suddenly became angry, and the fine fibers stood up one by one. He exclaimed happily, "the sky is shining!" As he told his son to be careful, he slowly approached the copper key on the hemp rope with his hand
suddenly, he fell to the ground as if he had been pushed by someone, numb all over. Regardless of the pain, he got up from the ground and connected the Leiden bottle to the copper key. There is electricity in this Leiden bottle, and it also emits electric sparks. It turns out that sky electricity and earth electricity are the same
he and his son took Leiden bottle home as if they were treasures
it was Franklin and his son William who captured tiandian. Franklin is not only a great scientist, but also an outstanding statesman and diplomat. He is one of the founders of the declaration of independence and the first American ambassador to foreign countries
ring his study in Alexandria, he often went for a walk by the Nile River. In the dry season, he saw farmers struggling to lift water from the Nile River bucket by bucket to irrigate the land. He created a kind of screw water extractor to take water from the river through the rotation of the screw, which saved farmers a lot of effort. It is not only used today, but also the original prototype of all the screw propellers used in water and air
When he was a child, Pavlov and his younger brother g a pit for planting apple trees. The pit had already been g. When his father saw it, he said it was not in the right place and g it again. The younger brother put down his shovel and gave up, but Pavlov g up again. He didn't care about the blood blisters on his hands until he g the hole and planted the apple treelater, Pavlov became a physiologist and spent all his time in the laboratory studying the conditioned response of dogs He often used his salary to buy experimental dogs. When dissecting a dog, it takes four or five hours. He counted the dog's saliva from the glass tube very carefully and recorded it in detail in his notebook. After counting for a while, a new assistant felt monotonous and tired But Pavlov solemnly said to him: & quot; If science needs it, count ten or twenty years& quot; At the age of 87, Pavlov developed hepatitis and then pneumonia, but he was still doing & quot; The drudgery of science;. He also regretted that he, as a scientist, did not fully fulfill his obligations to human beings Radar
in the January 1947 issue of the British Journal endeavor, a scientist published a very funny text to explain to us how bats guide their flight in the dark. No matter how dark or narrow, they never hit a wall. What's the reason? How does it know if there are obstacles ahead
two American biologists, Griffin and Garang Bao, have proved in 1940 that bats can avoid collision by using a natural radar, but it is sound wave instead of electromagnetic wave, which is completely similar in principle. A very high frequency sound wave is emitted from the bat's mouth, which is beyond the range of human hearing
the two scientists used a special electric equipment to record the high-frequency sound waves emitted by bats while they were flying. When the sound wave touches the wall, it will turn back. Its eardrum can distinguish the distance between the obstacles and fly in the right direction. Bats transmit sound waves in a very short time and in a very regular way, just like radar
and each bat has its own natural frequency, so that bats can distinguish their own voice without disturbance. For this reason, when a bat flies, it often opens its mouth. If you close its mouth, it will lose its command function. If you close its ears, it will hit the wall and cannot fly. This funny experiment revealed its secret
Nobel's father is a very talented inventor, devoted to chemical research, especially to the study of explosives. Influenced by his father, Nobel showed a strong and brave character from childhood. He often went to experiment with his father. With his father's years of experience in explosive research, his interest soon turned to applied chemistry. He began to study nitroglycerin this is a hard journey full of danger and sacrifice. Death was with him all the time. An explosion occurred ring an explosive experiment, and the laboratory was blown up without a trace. All five assistants died, even his brother. This amazing explosion made Nobel's father suffer a very heavy blow and died soon
out of fear, his neighbors sued the government one after another. Since then, the government has not allowed Nobel to carry out experiments in the city. But Nobel persevered. He moved the laboratory to a boat in a suburban Lake to continue the experiment
after a long period of research, he finally found a very easy to cause explosion material - Mercury fulminate. He used mercury fulminate to make explosive detonator, and successfully solved the problem of explosive detonation. This is the invention of detonator. It is a great breakthrough on the road of Nobel science
today's technologies
today's technologies involve a high degree of information collection and data analysis. Data management has become an important determinant of various instries. Therefore, the success or failure of enterprises largely depends on how the powerful and effective information around them is processed and managed. This makes blockchain technology to effectively manage the quality of data and compatibility with other existing technologies become the forefront of the solution
Jason Cassidy, founder of helium, told Xiaobian that AI is a term that few people understand
"every year, we rely more and more on artificial intelligence to help us. Now, when you combine the fast-growing blockchain technology with AI, you'll get some incredible synergy
enhanced technology
in terms of acceptability, after the initial development stage of numerous confrontations, the problems of blockchain instry have been finally solved. The instry is finding the right way to implement emerging technologies, and startups are taking advantage of the opportunities
cross technology collaboration
artificial intelligence is now in a stable development level, which can not only improve the working mode of blockchain, but also improve AI itself through blockchain technology
this synergy is reflected in the promising field of blockchain advertising instry, which combines blockchain intelligent contract and artificial intelligence neural technology in targeted advertising
Cassidy continues to explain that security, scalability, optimization of energy consumption and improvement of efficiency are some areas in which blockchain and AI can achieve benefits through coordination. Since both technologies are built on the basis of giving them a lot of trust, it is clear that these improvements will increase the degree of trust that society places on them over time.
disk observation
by the end of closing, the Shanghai index was up 0.85% at 2933.99; The Shenzhen Composite Index rose 1.80% to 9889.75; The index rose 2.77% to 1729.08. From the disk, the game, intellectual property protection, cement plate is in the forefront of the list, while the vitamin plate is relatively weak
Future prospect
if you choose instry investment, there will be investment opportunities in four types of instries: the first is the instry with broad prospects and increasing demand in the future, such as biomedicine; The second type is the instry itself is relatively stable, can maintain steady growth of the instry, such as must choose consumption; The third is the turning point of the instry, the fundamentals continue to improve; The fourth category is the low valuation of the instry. Although there will be downward pressure in the future, the instry is growing steadily and the stability of the leading target is high. Today's game instry's soaring, the reason may be the emergence of a third situation
in the game instry, the concept of cloud game is hot. As an investor, the main concern is whether cloud games can bring increment? Has the core business model changed? At present, the game instry is in the transition period from mobile games to next-generation hardware. Under the catalysis of cloud technology and 5g popularization, the increment of cloud games comes from the upgrade of business model and the increase of willingness to pay. We can expect 5g + cloud games to stimulate the instry growth brought by game innovation. From the perspective of instry competition, cloud games have higher computing power and network cost, and the differences in capital strength, resource integration and computing power distribution ability will lead to differentiation of different cloud game platforms, and the big platform has a high probability of winning
operation strategy
instries with undervalued value, such as banking, insurance, home appliances, building materials, etc., as well as high prosperity segments, such as consumer electronics, games, 5g communication, medicine and biology, are worthy of attention Wen Fu, investment consultant, practicing certificate No.: s02606111050006]
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