Miner life

1. The normal life of the mining machine is hard to say, because the bitcoin mining machine is updated too fast, and the growth of computing power in the whole network is amazing. Now S3 mining machine has been in the low-end mining machine, energy consumption is too high, income is not high. The ant S5 mining machine has come out.

2. Generally, it's not recommended to buy mine cards. If you're lucky, it may be OK to use them for half a year. If you're not lucky, it's not impossible to have problems when you buy them home.
some mine cards look good because there's no st in the mine machine, but because the hardware has been overused, all kinds of unstable problems may appear when you play games on the computer, And manufacturers generally do not guarantee the quality of mine cards.

4. In general, it's OK to use the graphics card for 3-5 years. In the end, it may be that the graphics card is too old and the driver can't be printed, so it needs to be eliminated. If it's mining, it's estimated that it won't last two years. In fact, when you use the computer normally, you mainly clean the computer, kill the virus regularly, and update the computer driver with the driver life regularly. You can use it for 5 years.

5. The cultivation of computational ability is an important task in primary school mathematics teaching. In primary school mathematics teaching, the proportion of calculation is obvious. From the point of view of the score of a test paper, the calculation of 100 points in the test paper accounts for about 40 points, not including the calculation in comprehensive application. For a long time, the boredom of the calculation class makes the students afraid. For calculation, it is necessary for teachers to start from the characteristics of teaching materials, the actual life of students, the psychological characteristics of children, contact the game activities, and carry out the integration of multimedia, so as to create a learning environment full of children's interest and vitality, and let students enjoy learning and love learning, On this basis, stimulate students' interest, so that boring computing teaching radiates new vitality, so how to cultivate students' computing ability? I would like to share with you the following aspects< To cultivate students' interest in computing and improve their computing ability
Tolstoy said, "what is needed for successful teaching is not coercion, but stimulation of students' interest.". Let students study in a pleasant atmosphere, can arouse students' strong desire for knowledge. Interest is not born, but through the novelty, uniqueness and sensibility of external things to meet the needs of students' psychological inquiry. Interest is the guide for students to get started and the internal motivation to attract students to enjoy learning. As a teacher, in the actual teaching process, we should pay attention to cultivating students' interest in learning, actively understand what students think and think, reasonably organize teaching according to students' different needs, excavate the internal interest factors in teaching materials, and turn boring computing knowledge into interesting mathematical problems Math story
1. The new curriculum standard puts forward "let students learn mathematics in a vivid and specific situation". Therefore, I put the calculation teaching in a certain situation, which makes the boring calculation class full of interest. For example, when consolidating the "7's addition and subtraction method", I first show the scene of the kitten catching butterflies on the grass, a total of 7 butterflies. Let the students observe carefully, talk about what the kitten should do on the grass, encourage the students to use their imagination and make up the story situation. Let the kitten continue to scratch, according to the results of the kitten scratch, list the formula. In this way, through the situation of kitten catching butterflies created in the textbook, students can consolidate the calculation in the process of wholehearted devotion to help kitten catch butterflies, not only learning happily, but also the accuracy of calculation is high
2. Choose appropriate games to cultivate interest in computing. Through the game, students understand that the society is inseparable from computing knowledge, and stimulate their interest in computing in the combination of learning and using. For example, the introction of the game "find friends" in the teaching of low-grade computing can not only carry out oral arithmetic practice, but also stimulate students' interest in computing. The specific method is: take the result of finding friends and is 10 as an example. The teacher patted his hand and asked: looking, looking, looking for friends, who will my little 3 go to? The student patted his hand and answered: find, find, find friends, your little 3 find little 7. In this way, the relatively boring learning of computing will become vivid and interesting, and students will be interested in learning, so as to get twice the result with half the effort
3 capture life information and cultivate interest in computing. By using the captured life information and introcing new knowledge, students can have a sense of closeness to computing and feel that computing and "life" are not mysterious. For example, when I was teaching the score application questions, I happened to meet the Olympic Games to be held in Beijing. So I prepared the situation that the Chinese team won medals in the previous two Olympic Games before class. In class, I asked the students to make up the questions themselves, and the students were full of interest. For example, "in the previous two Olympic Games, the Chinese athletes won 32 gold medals, among which the female athletes won the most, How many gold medals did the female athletes win The students quickly come up with the formula, 32 ÷ eight × 5 = 20, this is a practical problem that students are interested in. It makes them feel that they are not solving problems, but solving problems in life. It not only exercises students' ability to capture information, but also cultivates students' interest in computing
4. Stimulate interest in computing with the help of multimedia. The use of multimedia can change the traditional teaching and learning methods, adjust the classroom atmosphere, stimulate students' strong interest in computing, and guide students to actively participate in learning. For example, when teaching "different denominator score addition and subtraction method" 1 / 2 + 1 / 3, the screen first shows the picture of the first cake, inspiring the question: what is the result of 1 / 2 + 1 / 3? Use the animation function of multimedia to divide it into six parts. Then I ask the students not only to calculate the results, but also to talk about what they think. Students have a little difficulty, so I use multimedia animation effect to make students intuitively observe 1 / 2 + 1 / 3, and the result is 5 / 6. In this way, the whole thinking process is contained in the screen, which makes students have a strong desire for calculation and stimulates their self-confidence in learning calculation
Second, pay attention to the form of practice, improve students' computing ability
practice is not to ask students to endlessly do some repetitive, monotonous questions. In order to improve the efficiency of practice, the forms of practice should be flexible and diverse. Interesting data, novel question types and ingenious algorithms will make students attractive to boring calculation. Combined with the daily teaching content, students can practice some oral arithmetic. When practicing oral arithmetic, we can use the forms of raising cards, rushing to answer, driving a train, who is the champion of oral arithmetic and so on. In order to make students feel fresh all the time, the forms of calculation exercises should be varied, such as games, competitions, rush answers, train driving, limited time oral arithmetic, self compiled calculation problems, group competitions and so on. Practice requires less food and more meals, the same calculation exercises, put in different situations, the effect is also very different. In such an "entertainment" atmosphere, students have high interest in calculation, fast problem solving speed and strong consolidation< In the past few years, I have deeply realized the importance of cultivating students' good computing habits. There are some students, before the examination alone, the results will change a lot. Analysis of the reason is not the basic things do not grasp, but the usual habits do not. Good computing habits can not only improve learning efficiency, but also help the cultivation of computing ability. As Mr. Ye Shengtao said, "ecation is to cultivate good habits in one word." So, in primary school mathematics calculation teaching, what good calculation habits should we cultivate students
1. The habit of serious examination
careful examination is an important prerequisite for correct calculation. For calculation problems, some students can write, and the calculation is monotonous and boring, which may cause psychological fatigue. When they encounter similar numbers and symbols, they often make mistakes. In teaching, I ask students to take a look at the whole formula, which is composed of several parts, and think about how to calculate according to the general rules; Let's see if there are any special conditions. Can we use a simple method to calculate them. In particular, students are required to be full of confidence and patience when calculating. They will never stop until they finish a problem and do something wrong. As time goes by, they will develop a good habit of examining problems
2. The habit of writing carefully
in the teaching of calculation, students should be trained to write their homework and exercises neatly, not scribble, and the format should be standardized. The writing of numbers, decimal points and operation symbols in the title must be standardized, and the interval between numbers should be appropriate. Only by writing carefully, can the accuracy of students' calculation be improved
3. The habit of making drafts
some students make mistakes because they don't make drafts and use oral arithmetic. In view of this situation, I require each student to have a draft book, the upper row of the draft should be clear, and the digits should be aligned. I also often check the students' draft books from time to time, praise the students who are accurate and serious, and promote the students to form the habit of drafting
4. The habit of checking calculation carefully
checking calculation is an important part of the calculation process, and it is also a habit that students must cultivate. From the quality control situation of the curriculum reform period in our county, the students missed to do the topic, the examination was not strict, and the calculation would not be checked, resulting in a lot of meaningless points lost. In order to cultivate students' checking habit, I require students to do self-examination and checking after finishing their homework. In the calculation, we should insist on doing one-step calculation; Check repeatedly ring calculation; Check up and down when taking off; After the calculation, check it as a whole and train it repeatedly. In this way, we can check the calculation at any time, find and correct the errors in time, and ensure the correctness of the calculation results< In the process of learning, teachers should allow students to make mistakes. The key is to guide students to learn from their mistakes so that they will not make mistakes next time. Strengthening reflection after practice can improve students' ability of analysis and judgment. In the calculation, students' mistakes always emerge in endlessly. It's not ing the wrong number, it's reciting the wrong multiplication formula, or it's the wrong decimal point. They are all very small mistakes, but they often appear, which can't be ignored. Therefore, I always insist on face-to-face review of homework. At the same time, I ask students to record their mistakes, accumulate some typical error prone questions, and make a wrong problem set, and carefully analyze the causes of mistakes. I often check them to prevent similar mistakes; Some students have developed the method of "reading softly" for "ing wrong questions"; After each test, ask the students to find out the cause of the error and correct it. Practice has proved that fully mobilize the initiative of students, seriously reflect and correct mistakes, can achieve high efficiency, high quality effect
in a word, it is not an overnight task to cultivate students' computing ability, which should run through the whole process of primary school mathematics teaching. In primary school calculation teaching, our teachers should constantly think and innovate calculation teaching methods, combine the life reality and emotional attitude advocated by the new curriculum standard, and avoid the singleness and dryness of calculation. Then, we can believe that the day when students' calculation ability will be improved will not be far away.

7.

A: first, block height does not refer to the capacity of the blockchain

Second, the connotation of block height

block height is the number of blocks linked to the main chain, that is, the number of blocks connected to the blockchain

Block height is the indicator of block

2. The block has two identifiers, one is the hash value of the block head, the other is the block height

3. The hash value of the block head is the number obtained by the second hash calculation of the block head by sha256 algorithm

The

block hash value can uniquely and explicitly identify a block, and any node can independently obtain the block hash value by simply hashing the block head

4. Block height refers to the position of the block in the blockchain

The

block height is not a unique identifier

8. IPFs mining is the hard disk mining. The larger the capacity of the hard disk, the greater the mining potential and capacity. The most critical performance index of IPFs mining machine is the maximum number of hard disks it can hold. Interstellar bit hummingbird H1 has high performance and low energy consumption, so it is recommended.

9. In order to shorten the time of equipment maintenance, the damaged parts must be replaced in time. Therefore, it is necessary to store enough vulnerable parts in the warehouse. See table 23 for the material, service life and reserve of wearing parts of grinding machine. Table 23 materials, service life and spare parts of wearing parts of grinding machine Discharge end grid plate high manganese steel high manganese steel manganese steel 6 ～ 12 8 ～ 10 24 ～ 36 6 ～ 8 2 sets 1 set 2 sets of feeder scoop head feeder shell main bearing liner transmission bearing liner pinion ring gear liner plate bolt high manganese steel or cast iron Babbitt alloy steel cast steel 2 48 48 ～ 60 18 6 ～ 12 48 ～ 96 6 ～ 8 2 sets 1 set 2 sets 1 set 1 set 1 set 0.5 set www.x yzj8.com

10. Pro:
mine card generally refers to the card full of work for a long time before it is sold to you. It's the card that used to dig bitcoin. Because it can run under high load for a long time, its life is usually very short, and the probability of problems is very high

the performance of mine cards is generally very strong. But how long it will take is your personal character