Falling price of virtual currency

4. Dascoin is one of the typical representatives of anonymous currency blockchain projects. Not only that, dascoin can also use instant payment to achieve second arrival. How is it realized
dascoin was born on January 18, 2014, with a higher degree of anonymity than tecoin
dascoin has three transfer methods: one is ordinary transfer like bitcoin; Second, real-time trading. The transaction can be confirmed without the miner's packing confirmation, which can be realized in seconds; Third, anonymous trading. From the blockchain, we can't see who made the transfer with whom
how does dascoin conct anonymous transactions? In addition to ordinary nodes, there is another node called "master node" in Dasey coin. The master node can provide a series of services, such as anonymous transaction and instant payment. Traders who want to conct anonymous transactions initiate anonymous applications, and the master node mixes currency. Generally, three transactions are mixed together. For example, a table of people put all their money on the table, mix them together, and then take back the money of the corresponding face value, so that they don't know whose money you have. This is called mixed currency. After mixing money, the network does not know who transferred money to whom
its total amount is 9 billion, and all the new economic coins are issued at the beginning of the release, so each new block does not generate new new economic coin awards, and the block awards are only transaction fees, which is not enough incentive for the latecomers.

5. According to my experience, either at least two of the controllers have money in their hands and trade with each other, or the money is subscription money, which is issued in unlimited quantity, and the controllers issue it to themselves secretly

6. The cleverness of bitcoin design is that the groups and organizations with greater energy and computing power have more responsibility to maintain the security of the whole network, which is in their interests. The greater the ability, the greater the responsibility, which is reflected incisively and vividly in the bitcoin network, is an equilibrium point in the dynamic asymmetric game.

7. Let's first summarize the basic characteristics of the current computer multimedia information technology from the perspective of its practical influence on history

first of all, the highly integrated information is the most important and basic feature of this new technology. This needs to be explained from several different levels

the amount of information increases geometrically. Traditional books take paper as the medium, and its physical characteristics make people's collection of books subject to great restrictions. The so-called "huge" is a very vivid description, and some large libraries in the world are always bothered by the expansion of their collections. Therefore, the amount of information received by people through traditional books has practical constraints. The development of computer information technology has fundamentally solved this problem. At present, the most common 3.5-inch floppy disk with a storage capacity of 1.44 megabytes can store hundreds of thousands of Chinese characters' information, while a 650 megabyte CD-ROM can store tens of millions or even hundreds of millions of Chinese characters' information. If we input all the documents in the history of our country into the computer, the amount of storage required is also limited. At present, the computer instry is still developing higher quality and larger capacity storage media. Therefore, the amount of information that people can get by relying on this new technology with geometric growth is unmatched by traditional books

the forms of information carriers are diversified. With the development of multimedia technology, the so-called information media is far beyond the scope of words. In the field of computer, the so-called media has two meanings. One is the entity that stores information, such as disk, that is, the physical storage; The other is the carrier of all kinds of information, such as numbers, words, sound, graphics, images and so on. Media in multimedia technology refers to the latter

the integration of various information carriers. Information carriers such as picture, text, audio and video have always existed, but they are not easy to use because of the restriction of traditional technology. The revolutionary significance of computer multimedia information technology lies in that it not only makes it convenient for people to transmit the information such as picture, text, sound and image, but also integrates them. The so-called multimedia technology, to be exact, is the organic combination of digital, text, sound, graphics, images and animation and other media, and combined with advanced computer, communication and radio and television technology to form an integrated environment and interactive system that can organize, store, manipulate and control multimedia information. Through this kind of multimedia technology, the information people can get will not be one-way, not only two-dimensional, but also three-dimensional, and can completely imitate the real life, which provides the possibility for people to use computers to easily reproce historical scenes. Human history is vivid and colorful. The traditional interaction based on text and text is far away from the natural interaction of human beings. It has an insurmountable obstacle to the reappearance of historical scenes. Computer multimedia information technology helps people overcome this difficulty< Secondly, information transmission is interactive. This is the direct embodiment of the computer as an intelligent tool. In professional terms, the so-called interactivity means that all parties involved, whether the sender or the receiver, can edit, control and transmit information through various media. Specifically speaking, in the field of history, it has the following two objective functions:

greatly improve people's interest in reading historical works. In human perception system, visual information accounts for more than 60%, auditory information accounts for about 20%, and touch, smell, taste, facial expression, gesture and so on account for the rest. The emergence of multimedia technology, especially the integration of graphics, audio-visual and other information, will greatly improve the interest of historical works, enhance people's interest in reading, and make the transmission of historical knowledge achieve unprecedented results. But the use of computer as an intelligent tool is not only reflected in this, more importantly, it can make the reader directly participate in the dialogue, that is, to realize the so-called "man-machine dialogue". The reader can control, select and edit the information transmitted by the computer, so that the reader will no longer simply and completely passively accept the information, It is the initiative in the process of knowledge acceptance, which is the central idea of constructivism, the mainstream theory of computer application ecation since the 1990s. Constructivism emphasizes the ecatee as the center. It not only requires the ecatee to change from the passive receiver of external stimulation and the object of knowledge infusion into the subject of information processing and the active constructor of knowledge meaning, but also requires the teacher to change from the imparter and the instigator of knowledge into the helper and promoter of the ecatee's active meaning construction. Constructivism holds that learning environment includes four attributes or four elements: situation, negotiation, conversation and meaning construction. Computer information technology is the center of promoting these elements. The multimedia technology of picture, text, sound and image can create an immersive situation for learners; The voice function of multimedia is the main tool for negotiation and conversation between learners and information transmitters; Through "man-machine dialogue", the information receiver controls the learning process, thus completing the meaning construction of the learning process, that is, consciously and actively accepting knowledge

realize nonlinear hypertext reading. Since the wide application of printing technology, human beings have been used to reading text and searching for information from various books. The knowledge and information in the text can only be arranged in a linear structure, that is, the reader must read graally in order, even the general audio-visual works. Therefore, there is an insurmountable limit between the speed and efficiency of reading and retrieval. There is a fundamental difference between the electronic reading materials using computer technology and the traditional way of reading. In e-books, the connection between knowledge is no longer linear, but reticular, which is a kind of hypertext reading. Readers can easily retrieve and organize information by computer, and its efficiency is beyond the reach of any human brain. In the process of reading, readers can easily retrieve, transfer and read the information related to the text, thus forming a network knowledge structure, which fundamentally goes beyond the boundaries of traditional reading methods and promotes the leap of information transmission means< Thirdly, information transmission is very convenient. This is mainly for electronic publishing. As mentioned above, the traditional information transmission is mainly based on paper books, and the circulation and storage of books have certain limitations. The electronic publishing using computer technology is fast, convenient, cheap, and has a huge amount of information, which can fundamentally overcome the problems existing in the information transmission media of paper books. There are two types of electronic publishing: one is CD-ROM, the more common is CD-ROM publications; The second is electronic transmission, that is, the use of computers and computer networks to transmit information electronically. People first edit the electronic documents in a common format on the writing system, and then send them to the readers through the computer network. The readers read the received information through the browser. This is the information transmission of the Internet that people are already familiar with. In developed countries, these two forms of electronic publishing are very popular. However, e to the development of the Internet, electronic publishing is more popular. In China, e to the restriction of system and other factors, the cost of network communication remains high and the expansion is relatively slow. The main body of electronic publishing is CD-ROM. CD-ROM readers can store an amazing amount of multimedia information, such as the huge British online book, which is made into CD-ROM with only three small pieces, and also contains a large number of audio-visual information that the original paper text does not have

these characteristics of the current computer information technology are the starting point for us to consider its impact on history<

II

modern computer information technology has provided many unprecedented and attractive expression methods for historical achievements< In recent years, no matter how people explain it, the existence of "historiography crisis" is an undeniable reality. This has not only become a heavy psychological burden for historians, but also has a direct impact on their academic survival. In addition to the influence of external social factors, there is no denying that most of the traditional historical works are boring, which is an important reason for the formation of historical crisis. If we put aside the advantages and disadvantages of traditional historiography's pursuit of scholarly interest consciously or unconsciously, under the premise that people's pace of life in modern society is accelerating day by day and audio-visual culture is impacted comprehensively, the traditional historiography books, which are good at logical thinking and philosophy, will undoubtedly encounter strong competitors. The introction of computer information technology into historiography is not only to make up for the defects of traditional historiography, but also to transform historiography to adapt to the rapid development of contemporary society< In fact, historiography is a very suitable object to be represented by multimedia technology, because human history is vivid and colorful. There is no need for historians to spend too much effort. Only the existing image data about human history, such as the objects and pictures of various cultural relics, historical art works, historical sites and so on, are quite abundant. After the invention of modern photography, there are more real data such as photography and film. The music scores left by our predecessors can also be used to explore the music of that time and provide us with various very important sound information carriers to understand history. Before the development of computer information technology, it was very difficult for people to and disseminate these image data, and the cost was very expensive. As a result, the traditional historical books were basically explained by words, and their attraction was limited. However, there is almost no cost constraint on the reproction of computer information. Therefore, historians can freely quote image data, and then send them to readers in the form of electronic publishing. In the history after the invention of modern photography, it is possible to directly introce the documentary films of historical scenes into the electronic books. Obviously, this is not just a problem of enhancing the readability of historical works. The full use of image data, the description of historians and the understanding of readers, all have the effect that the traditional historical elaboration method can't achieve

of course, the use of computer information technology in historical achievements is far more than quoting more image data. What's more, historians can borrow this technology, rely on their own research on history, directly quote existing historical materials and combine simulation and other techniques to actively reproce the historical reality. Take a few examples:

Mr. Shen Congwen's "history of Chinese clothing" is an excellent book, which is well-known. Recently, when I read this book, I often have this idea: if this book can be edited by using computer multimedia technology, it will certainly achieve unexpected results. Clothing is an important form of human culture, only with the existing image data, some of the content is difficult to transmit. If we can use three-dimensional animation technology and simulate the historical reality, and let the characters in the book wear the costumes of different nationalities in history, we will be able to let readers understand the meaning of different national cultures in Chinese history. Some objects only rely on static pictures, which is difficult for readers to understand. Using 3D animation technology can be intuitive and simple

8. Yes, in order to welcome the arrival of double 11, all businesses are doing discount activities, and the price will be reced a little ring this period