Ethereum CSDN

1.

1、 Different definitions:

1. virtual currency:

virtual currency refers to non real currency

digital currency:

digital currency is an alternative currency in the form of electronic currency. Both digital gold coin and cryptocurrency belong to digiccy

3. Cryptocurrency:

cryptocurrency is a kind of transaction medium that uses cryptography principles to ensure transaction security and control the creation of transaction units

4. Token (token):

a kind of article whose shape and size are similar to currency, but the scope of use is limited and has no currency effect, and its token is the homonym of token in English

Second, the characteristics are different:

1; It can also be said that virtual currency is personalized currency. In another way, it can also be called information currency

2. Digital currency:

is an unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of specific virtual communities

Cryptocurrency:

cryptocurrency is based on the decentralized consensus mechanism, which is opposite to the banking and financial system relying on the centralized regulatory system

4. Token (token):

usually needs to be exchanged for money, used in shops, playgrounds, mass transportation and other places, as a voucher to use services and exchange goods

extended data

at present, digital currency is more like an investment proct, because it lacks a strong guarantee agency to maintain its price stability, and its role as a value measure has not yet appeared, so it can not be used as a means of payment. As an investment proct, digital currency cannot develop without trading platform, operating company and investment company

digital currency is a double-edged sword. On the one hand, the blockchain technology it relies on has been decentralized and can be used in other fields except digital currency, which is one of the reasons why bitcoin is popular; On the other hand, if digital currency is widely used by the public as a kind of currency, it will have a huge impact on the effectiveness of monetary policy, financial infrastructure, financial market and financial stability

2. Lyb currency, which was just launched on April 9, is a new currency developed by American alphabet company. If you want to invest in digital currency, it must be a good one for new research and development, with large growth space and high profits,

3. Where is the way out for 2021 programmers
log in

lvxiaoxiang
pay attention to
faceschool original
December 27, 2018 16:12:45
85 praise

lvxiaoxiang

four years old

pay attention to
it has been four days since the end of postgraate entrance examination, After a few days of natural and unrestrained time, I still want to share with you some of the process of my postgraate entrance examination. In the past half a year, many people thought that I spent most of my time on the postgraate entrance examination. In fact, I did some other interesting things. For example, in the postgraate entrance examination process, I went to participate in the computer design competition, also honored to win the national first prize, still a little proud. Now let's get down to business. Let me talk about the experience of participating in the competition As for the experience of the postgraate entrance examination, I would like to share with you after the results of the preliminary examination)

as a senior who participated in the two competitions, I want to tell you that this competition is still very routine, and once you master the routine, it is good to win the prize

about the judges and evaluation criteria of the competition: it is worth noting that the evaluation criteria of the judges of the school competition, the city competition and the national competition are slightly different, so naturally the results are also very different, but the evaluation of the school competition and the national competition are similar, and the standards of the city competition are slightly different. In fact, the author thinks that there are two main points in game planning: innovation and algorithm. In particular, the city competition pays more attention to the compilation of algorithm, while the national competition pays more attention to innovation. What's more, it's worth noting that many of the judges of the National Games are professors of the older generation, so we have to figure out how to convince the judges of the older generation that your project is very practical and important

suggestions on topic selection: I believe there are still many students who still don't know what to do or where to start, so I want to tell you that the judges of the national championship are aging, and most of them like to see some relatively new technologies and topics. So we can combine the hot technology on the market with our daily life to determine the goal of our software. For example, this year's competition software of the author is an attendance system that applies living face recognition technology and geographic information positioning to class roll call. It also uses NLP natural language processing and emotion recognition of network AI to make a comment system, which mainly solves the problems of absenteeism rate, late rate and substitute rate in our daily learning; A friend of the author also won the first prize for a system with the characteristics of blockchain, bill market and Finance University. So I still suggest that you use some new technology now, and make a useful system with a problem in your life. Remember to be new. If the topic is not new, the teacher will easily ask why I want to use your software instead of the more mature software on the market

about how to learn and choose novel technology: the author here can provide you with some relatively novel technology websites for you to consider, and there are many ready-made APIs for you to consider. 1. Internet AI, website: http://ai..com/ 2. Tencent AI, website: https://ai.qq.com/ 3. Ethereum, website: https://ethfans.org/ 4. Turing robot, website: http://biz.turingos.cn/home 5. Tencent big data platform, website: https://data.qq.com/ 6. Knowledge workshop, website: http://kw.fudan.e.cn/ . Readers recommend that you consider the knowledge workshop. After all, knowledge mapping is a hot topic, which can be well applied to practical projects, and it can be done in a dazzling way. Few people who participate in the competition use knowledge mapping, which is a relatively new technology

about team division: This is a very important point. Because the general project team has three people, so in my opinion, the best match is a front-end, a back-end, a dedicated document writing Document writing is really troublesome)

front end: if you participate in the design of the web site, the author's suggestion is that you should at least use a simple version of the mobile terminal, because in the first year of the competition, the author was asked: now is the era of mobile Internet, your idea of this project is OK, but it's too troublesome to use. So the next year, the author made a mobile terminal (small program), and the judges didn't say that we were inconvenient to use. For the proction of mobile terminal, the author's suggestion is to make a small program, because the small program is really easy to learn, and the code is very similar to HTML, CSS and JavaScript. It's very simple. The key is that its advantage is that it is suitable for both Android and IOS App learning website: https://developers.weixin.qq.com/miniprogram/dev/index.html

back end: I suggest you still use the framework to write code, because it's really convenient to use the framework. Many predecessors have written a lot of very useful interfaces in advance, such as the storage of pictures, videos, etc., if you use the native code to write, If you don't use the cache, it will run very slowly, but if you use the framework, there won't be such a problem, because the predecessors have designed excellent ready-made interfaces for you to use, and you can learn from the source code they wrote when you have time. The most important thing is that the enterprise recruits people who can use the framework. Of course, I'm not saying that the original is not good. The original is an internal skill, and we should pay attention to it. However, there may be some problems in the learning of framework at the beginning, but I believe you can solve this problem very well! Here I recommend you to learn several frameworks: ThinkPHP, Django, springboot. The first two are relatively easy to learn, which are PHP and python frameworks, while the latter one is relatively difficult, which is Java. For those who want to learn crawler, they can learn Django, because it is very similar to the crawler framework scrapy, which is easy to master at the same time. It is said that Django and scrapy are developed by the same development team, so they are very similar. Of course, I just heard that I don't know what the actual situation is, hahaha

documents: the preparation of documents is really cumbersome, because there are many documents, so it's better to have a special person to write documents, especially to be able to build UML diagrams, mind maps and so on. When writing a document, you must pay attention to the time node. If you miss the time node, it's a pity

about programming language learning: I believe many students can't find a better programming language or framework learning website at present. Here I recommend several websites that I think are better: 1. MOOCS website, website: https://www.imooc.com/ 2. Laboratory building, website: https://www.shiyanlou.com/ 3. MOOC of China, website: https://www.icourse163.org/ 4. CSDN, website: https://www.csdn.net/ 5. GitHub, website: https://github.com/ . Now, we need to buy money in the Mogao class network and the experimental building. We need to buy money now. It's more expensive. You can go to salty fish and turn around to find a screen lesson. A treasure has been forced by some treasure official account. Of course, if you really can't find it, you can ask me some frames of learning videos in the background of public numbers. I still have some video stock of courses. The disadvantage of Chinese MOOCS lies in its timeliness. It can't be seen after the learning time of the course. It may be to protect teachers' rights and interests of knowledge labor. CSDN is very important. For beginners, CSDN should be able to cover all your problems. GitHub, as we all know, is mainly used to search for ready-made projects to learn other people's ideas of building software, or to search for some useful plug-ins, such as IP agent pool and fake user agent, which are commonly used in crawlers.

4.

Artificial intelligence is a branch of computer science, not a single discipline, image recognition, natural language processing, robotics, language recognition, expert system and so on, each research is full of challenges. Interested in artificial intelligence, but unable to determine the specific direction, how to understand the status and research areas of artificial intelligence

the author recommends four undergraate general books. For most people, the reading difficulty is not high, the formula and theory are few, the content is interesting, and they can read on; The information is fresh and complete. It's better to have some reading value and deep thinking. The book list is not long. It's only for the introction of popular science

1, super intelligence

2, our last invention: artificial intelligence and the end of human era

3, intelligent era

4, artificial intelligence: the grasp of national artificial intelligence strategic action

< P >

5. If it's lost, it's better to post the lost advertisement

6. Obviously, it's a hoax, a hoax of pyramid selling under the guise of blockchain. Don't charge money to be a member!! Don't charge money to be a member!! Don't charge money to be a member!! The reason is to be a platinum member of 299. It's literally one year, but actually only one month. Why? Because there is no contribution value in the second month, the income will drop to 10%, that is, the income of only 30e drill every day. According to the current one dime of an e drill, it costs 3 yuan a day and 90 yuan a month (converted into RMB in the future, it will be lower and lower, even collapse). The prices of the goods on the mall are all very high, and the things that cost more than 10 yuan on Taobao are marked with more than 100 yuan, The premium is ten times. In short, you are a member and you are mining every day. After a month and a half, you can change something worth more than ten yuan. Listen to me and decide whether you want to be a member or not. Then I'll tell you about their current routine. Why did they say that there was no contribution value in the second month, and the income would drop to 10%? Because they are going to launch Diamond members, so they use contribution value to abolish Platinum members, and contribution value is only obtained by pulling the head, which means that if you don't help him pull the head, you charge 299 for nothing, which is naked MLM!! What's more, the current situation of their exchange mall is that all the goods in it are out of stock. Even if you have more e-diamonds, you can't exchange things

7. When we pay attention to it, we must compare it in many aspects. First of all, we should choose it according to the demand, and also pay attention to the team strength and effect. The baker chain blockchain we know is well evaluated in the instry, has a good reputation, and has done well in all aspects. You can consult first

8.

On September 4 last year, the central bank issued a document explicitly calling for a halt to the financing of token Issuance - that is, the ICO ban. This kind of illegal sale and circulation of tokens by financing entities to raise so-called "virtual currency" such as bitcoin and ether coin from investors is prohibited in China

now that more than half a year has passed, what is the situation of these "virtual currencies" boasting "blockchain technology"

the reason why Yang Chao invested in virtual currency is mainly e to the price fluctuations. Bitcoin, for example, emerged in 2009, with less than one cent per bitcoin. In less than ten years, its price once exceeded 120000 yuan. Under such a soaring market, the mentality of being able to get rich overnight attracts a large number of investors

After

95, there are 1000 bitcoins, which is the symbol of Zheng Haosheng in the "coin circle". In one year, he turned the 140000 yuan principal into several hundred million yuan. At present, he still has more than 50 different tokens. But professional investors like Zheng Haosheng are not always winners

ZHENG Haosheng, a virtual currency investor, said that in the past two days, he had a direct loss of 200 bitcoins, worth 10 million, and an indirect loss of about 30 million. How many people earn, how many people lose, more people are in the loss, blindly admission, 80% are in the loss

According to the data, there are about 1600 kinds of virtual currencies in the world. The cumulative daily turnover is more than $10 billion. Among them, bitcoin's daily turnover is about $6 billion. Domestic investors are big buyers of global "virtual currency"

Mao Hongliang, director of the blockchain Research Office of the national Internet financial security technology expert committee, said that taking the largest international platform as an example. It is monitored that from 2018 to now, the exchange transaction volume between digital currency and RMB is about 1.3 billion yuan, accounting for about 13% of the total transaction volume of the whole platform

instry insiders say that the most dangerous thing in the bubble is the "air money" which is not supported by physical projects. P>

2018 January 15th, known as the world's first support for digital encryption currency gaming platform hero chain, on-line "break", from the issue price of 0.6 yuan to 0.05 yuan

IT community and service platform vice president of CSDN Meng Yan introced, this can be more confidently known as air money, accounting for it is hard to say, but under the bubble, this ratio is not small. It may exceed 50%, 60% or even 70%

"air currency" is different from other financing projects, the financing subject of issuing financing does not need to be a real company, a temporary "team" can become the financing subject. After the central bank banned the issuance of token financing, the original domestic token projects have chosen to move their servers and the registered places of financing entities abroad. The token financing project with the "team" as the main financing body does not even need to move the registered place out, and it can continue to raise money as usual

Mao Hongliang, director of the blockchain Research Office of the national Internet financial security technology expert committee, said that many ICO subjects are just a team, and many of them are not registered to the company level, so it is difficult to say that there is a company subject or an enterprise subject

9. Try it again. If you can't do it again, find a professional. It won't cost much

10. Guangxu Yuanbao (Beiyang) coin face: the Pearl circle is full of "Guangxu Yuanbao" in Chinese, the outer ring (made in Beiyang), the lower ring "Kuping seven coins and two cents", one garden star on the left and one star on the right. Qianbei: the center is the picture of Panlong, the outer ring is in English, the Arabic numeral 25 is on the left side, and there is a garden of snacks on the left and right sides. Background: at the end of the Qing Dynasty, there was a dispute between the court and the field over the unit of silver and the currency system was not unified. Beiyang Machinery Bureau changed its name to Beiyang minting Bureau. After casting silver coins which were separated from "two units" earlier, it began to cast "Guangxu Yuanbao" with the face value of Kuping and Kuping in the 25th year of Guangxu. The Arabic numerals on the left side of the back of this kind of coins indicate that the coins are Guangxu x-year version, and there are 25, 26, 29, 33, 34 and so on, The price of coins should be determined according to the quantity of coins handed down from generation to generation and the market demand. When you go to "guquanyuandi" to inquire about the detailed information of the reference price of coins, the price is about 500 yuan, which is different from the price of 25 years' real procts. Address:
http://blog.sina.com.cn/hgaodi