Do different algorithms have different computing power
computing power is a measure of bitcoin network processing power. That is, the speed at which the computer calculates the output of the hash function. Bitcoin networks must perform intensive mathematical and encryption related operations for security purposes. For example, when the network reaches a hash rate of 10th / s, it can perform 10 trillion calculations per second
in the process of getting bitcoin through "mining", we need to find its corresponding solution M. for any 64 bit hash value, there is no fixed algorithm to find its solution M. we can only rely on computer random hash collisions. How many hash collisions can a mining machine do per second is the representative of its "computing power", and the unit is written as hash / s, This is called workload proof mechanism pow
computing power provides a solid foundation for the development of big data, and the explosive growth of big data poses a huge challenge to the existing computing power. With the rapid accumulation of big data in the Internet era and the geometric growth of global data, the existing computing power can no longer meet the demand. According to IDC, 90% of the global information data is generated in recent years. And by 2020, about 40% of the information will be stored by cloud computing service providers, of which 1 / 3 of the data has value
therefore, the development of computing power is imminent, otherwise it will greatly restrict the development and application of artificial intelligence. There is a big gap between China and the advanced level of the world in terms of computing power and algorithm. The core of computing power is the chip. Therefore, it is necessary to increase R & D investment in the field of computing power to narrow or even catch up with the gap with the developed countries in the world
unit of force
1 KH / S = 1000 hashes per second
1 MH / S = 1000000 hashes per second
1 GH / S = 1000000000 hashes per second
1 th / S = 100000000000 hashes per second
1 pH / S = 100000000000 hashes per second
1 eh / S = 100000000000 hashes per second
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The difference between algorithm and program is as follows:
(1) the two definitions are different. Algorithm is the description of solving steps of specific problems, it is a finite sequence of instructions. The program is a series of statements and instructions to achieve the desired purpose
to say that some popular algorithms are the ideas and proceres for solving a problem, and they are the specific and easy to write code for solving these problems. The algorithm has no language boundaries. He's just an idea. In order to implement the same algorithm, programs written in different languages will be different
(2) the writing rules of the two are different. The program must be written in the specified programming language, and the algorithm is very arbitrary. Algorithm is a series of clear instructions to solve the problem, that is to say, it can obtain the required output in a limited time for a certain standard input. Algorithms often contain repeated steps and some logical judgments
simple algorithm example: find 1 * 2 * 3 * 4 * 5
Step 1: find 1 * 2 first and get result 2
Step 2: multiply the proct 2 from step 1 by 3 to get the result 6
Step 3: multiply the proct 6 from step 2 by 4 to get the result of 24
Step 4: multiply the proct 24 from step 3 by 5 to get the final result of 120
The relationship betweenalgorithm and program:
algorithm and program are both finite sequences of instructions, but program is algorithm, and algorithm is not necessarily program. Program = data structure + algorithm. The main purpose of the algorithm is to provide people with the workflow and steps to read and understand. Data structure and algorithm can only be executed by computer system through the realization of program. It can be understood that data structures and algorithms form executable programs
extended data
elements of the algorithm:
I. operation and operation of data objects: the basic operations that a computer can perform are described in the form of instructions. The set of all instructions that a computer system can execute becomes the instruction system of the computer system. The basic operations and operations of a computer are as follows:
1, arithmetic operations: addition, subtraction, multiplication and division
Logic operation: or, and, not and so on3. Relational operation: greater than, less than, equal to, not equal to, etc
Data transmission: input, output, assignment and other operations Second, the control structure of an algorithm: the function structure of an algorithm depends not only on the selected operation, but also on the execution order of each operationsc config "服务名" start=delayed-auto
I don't know when many people began to pay attention to virtual currency, and bitcoin is a kind of virtual currency. Tesla's suspension of using bitcoin for payment will rece the value of bitcoin, and for ordinary people, we should also pay attention to the risks of bitcoin. Next, I'll explain to you{ RRR} 3. We must pay attention to the risk of investment
now there are many ordinary people who only want to get better profits, but ignore the risk. The price of bitcoin has indeed risen a lot. For many people, it is possible to make money, but also many people lose money. Moreover, we should pay attention to the risk of bitcoin. On the one hand, it is a virtual currency, on the other hand, it is not protected, So if there is a loss, it is difficult to recover, so for ordinary people, we must pay attention to the risk of investment
in a word, with the development of society, our life is getting better and better, and many people want to get higher income, so they begin to pay attention to virtual currency. The value of bitcoin has indeed increased a lot, but we should also see its risk. Because it is virtual currency and it is not protected, once there is a loss, it may be bankrupt, Therefore, I think that Tesla's suspension of using bitcoin to pay also reces the value of bitcoin, which will lead to price rection and also cause many people to suffer losses< br />
Second, you should have a good service attitude and good quality, especially at the start-up stage. You should try your best to meet the needs of customers. If necessary, you can make some sacrifices to work extra shifts without extra costs, so as to win back customers and reputation
1 Baby details page description practice
novice online store sellers usually imitate their peers when they just open a store to do baby details page description. At this time, you can go to several peers with high sales volume, break down their detail pages by moles, and then compare them to see which moles are jointly owned. You can put these moles in your own detail pages
why is it suggested to imitate when doing the details page at the beginning? Just imagine, no matter how powerful the master is, he only knows more about the categories he is engaged in. For other categories, the real masters are those with high sales. Their pages are often recognized by consumers. All you need to do is to imitate their page and give a more powerful promotion than the peers
(2) price advantage of procts generally speaking, online store proct page and price should be done well at the same time. For the same proct, maybe it's only a few yuan. In the case of the same exposure, the sales volume of one proct may be several times that of the other. Therefore, we must pay attention to the price. Generally speaking, there are three factors that need to be considered in price positioning: cost, customers and competitors. First of all, we need to consider the cost, then we need to see what price we want to enter the market, and then we can draw up our own price with reference to the price of our competitors
therefore, before proct positioning, we need to look at the market, which price of sales is good, the profit is considerable, and the competitors are relatively few. At this time, we measure and compare each other from the material, brand awareness, sales and other aspects. Give yourself a strong promotion price
(3) do a good job in the basic sales volume
for the buyers of online stores, the sales volume of a store is very important, which is often the decisive factor to decide whether the buyers place an order. The transformation gap between 0 sales volume and 1000 sales volume is often hundreds of times. Therefore, sales volume is very important for transformation. In many cases, the seller to solve the problem of sales, a lot of ways is to brush or loss sales. Pay attention not to be caught by Taobao, to control the relationship between traffic and conversion, as well as the account number of the person who swipes. As for loss making sales, we really need to consider it clearly and see if we can afford it
(4) traffic promotion
normally, the drainage methods of online stores in the early stage are mainly natural search traffic and through train. And outside the station, more like network know, SEO, video promotion, QQ group promotion, classified information promotion and so on
(5) test price
after the optimization of baby details page, price promotion and traffic promotion, it is not difficult for online stores to issue orders. If you want to increase the sales volume, you should test the price yourself, do market analysis, compare the price of your peers, and then decide whether you want to raise or lower the price. Test each price for 3 days, and then look at the data feedback to find a price with larger sales volume
(6) do a good job in the marketing of old users when online stores are in operation, the maintenance of old users is necessary for those treasures that consumers often need to buy. Methods can let them pay attention to your micro Taobao, wechat, microblog, QQ group, and then share some valuable content and provide some promotional activities