Mother currency of digital currency

1. SEC, the next generation of e-commerce blockchain protocol based on social trust, is the first blockchain system in the world to promote the socialization of e-commerce. In essence, SEC establishes the trust foundation of e-commerce indivials through distributed bookkeeping transaction relationship and trust endorsement, and takes it as the basis of consensus. SEC main chain can be used in commodity trading, second-hand commodity trading, virtual commodity trading, commodity equity, commodity crowdfunding and other fields. Under the strong wind of social e-commerce instry, SEC team will focus on the field of social e-commerce based on its own supply chain and user data
after the transfer of user terminals from PC to mobile phone, the e-commerce form has reached a new turning point, and is rapidly moving towards mobility, fragmentation and socialization. In three years, social e-commerce has occupied 14% of the market share of the whole e-commerce, with an annual growth rate of more than 100%. Once the share exceeds 20%, the replacement of traditional e-commerce will accelerate, just as traditional e-commerce will squeeze offline retail
based on WeChat's user volume and user time in China, the Chinese mainland market has been leading the global market in terms of innovation and market size. The main modes of social e-commerce include online Red e-commerce, content e-commerce and wechat circle of friends e-commerce. In essence, the three business models are based on personal brand and circle of acquaintances to establish trust relationship, and then attract users through content display
Social e-commerce has subverted the trust mechanism of traditional e-commerce in form, but there is no new trust solution mechanism to adapt to the P2P business model of social e-commerce, which restricts the growth of social e-commerce and model innovation in a higher dimension.

2. For many people, the concept of digital currency is a mystery. But there is no doubt that digital currency is different from virtual currency

virtual currency is the electronization of illegal currency, and its original issuer is not the central bank. This kind of virtual currency is mainly limited to circulation in a specific virtual environment. Digital currency can be used for real goods and services transactions, but only the digital currency issued by the state is legal digital currency

in 2013, the central bank, together with five ministries and commissions, issued the notice on preventing the risk of bitcoin, which clearly defined non legal digital currencies such as bitcoin as virtual commodities, not in the form of currency and legal currency< At the same time, digital currency is different from electronic payment. In the actual use experience, digital money and electronic payment may feel similar, but they are still quite different in essence. Before digital currency, the financial instry has been highly informationized. Such as Internet banking, WeChat, Alipay and so on pay the popularization of electronic technology, physical cash accounts for only a very small part of the total circulation of money. In spite of this, because the money used in the transaction comes from the bank account, it actually corresponds to the banknotes.

3. It's not necessary to say that this thing is deceitful. If it is issued by the state, there must be government and full-time personnel with certificates.

4. The mother currency is the total number of virtual coins issued by the system at the beginning. Please accept it

5.

f=N μ N is the positive pressure, that is, the pressure acting on the contact surface, μ It is the dynamic friction coefficient, which refers to the influence factors of the roughness of the contact surface on the friction. Or use the balance f = f; It's only used when it's stationary or moving in a straight line at a constant speed, but it's the most used in junior high school

the so-called friction is the force that hinders the relative motion of the object, and the direction of friction is opposite to the motion direction or relative motion direction of the object. The conditions of friction are as follows:

(1) two objects must contact each other

(2) there was extrusion between two objects

(3) there is a tendency of motion or relative motion between two objects

If an object is stationary on a horizontal plane, it will not be affected by friction if it is not pushed or pulled. If thrust or pull is received, it belongs to the category of static friction. The size of friction is equal to that of pull or thrust, and has nothing to do with the gravity or pressure of the object. Only the maximum static friction is related to the pressure or gravity on the object

if the object is not pushed by 10N force, the object will be subjected to static friction, which is equal to the thrust. Just push with 15N force, and the friction force on the object is the maximum static friction force. If the thrust force is increased later, the friction force will not change. Theoretically, the sliding friction of objects is less than the maximum static friction, but it is generally considered that they are equal

The friction force is f = 15-10 = 5N

extended data:

methods to increase beneficial friction

(1) increase the roughness of contact surface

(2) increase the pressure

(3) change rolling friction into sliding friction

(1) replace sliding friction with rolling friction

(2) make the contact surface separate [form a layer of air cushion or magnetic suspension on the contact surface of the object]

(3) decrease the pressure

(4) rece the roughness of the contact surface

In engineering technology, people often rece friction by applying lubricating oil. The science of this problem is called tribology, which is a branch of mechanical manufacturing

If two objects, which are in contact with each other and squeeze each other, but relatively still, only have a relative sliding trend under the action of external force, but do not have relative sliding, then the force between their contact surfaces hindering relative sliding is called "static friction". When the static friction increases to the maximum, the object will move

size: the static friction varies according to the external force, but there is a maximum value, which is called the maximum static friction. The maximum static friction is slightly greater than the sliding friction

direction: tangent to the contact surface, opposite to the direction of relative motion trend

On the basis of a large number of experiments, G. amunton and C. - A. de Coulomb proposed the following law of friction in 1699 and 1781:

① the friction between two objects in contact does not exceed a certain maximum value, which has nothing to do with the size of the contact area

(2) the maximum value of friction is proportional to the normal pressure n between two objects

(3) the direction of friction is opposite to the sliding direction of the object, and its magnitude is directly proportional to the normal pressure n between the two objects

the above conclusion is only a rough empirical rule, but because it was found in the early days of mechanical science, it was called the law of friction, also known as Coulomb's law

6. Tiktok: first, you can record the mode and then save it to the local. Then you'd better download the mobile phone editing and edit it, then click the middle and the lower plus sign to send the local video.
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anonymous user 1 hours ago.

7. So far, no country has issued digital currency, but swindlers have issued hundreds of worthless digital currencies. They can also trade on the exchange opened by swindlers, buy RMB and lose money. They can make a lot of money by buying the currency issued by these swindlers. They repeatedly emphasize how much money they can make a year and what is the rate of return, but they never mention how these profit returns come from? There are many leeks who are blinded by profits!

8. In the future, the digital currency will replace the current paper currency, and the central bank's digital currency will soon come out. Your mother is more receptive and insightful than you