Central digital currency code law in January 2020
1. Enjin (enj)
in the near future, the game instry is the instry most likely to adopt blockchain on a large scale. Enjin coin is the cryptocurrency of virtual goods created by Enjin. Enjin is the "largest online gaming community platform" with more than 250000 gaming communities and 18.7 million registered gamers
Cardano (ADA)compared with Ethereum, EOS and Tron, Cardano is the third generation of decentralized app (DAPP) and smart contract platform. Cardano's design philosophy has the following points:
scalability: with the growth of users, the transaction processing speed is not affected or even faster, such as P2P protocol
interoperability: in the future, there will be countless devices connected to each other, instead of only connecting and forwarding through routers. All kinds of devices can communicate directly through standard general protocol
Sustainability: like bitcoin, Cardano project will not be controlled and influenced by a certain company or organization, which is a safe, decentralized and sustainable development platform
With the popularity of sto (security token offers), Nash also plays an important role. Nash is a kind of registered security token. In the past, Nash participated in and led the development of many projectsNash exchange is a decentralized exchange. If you hold nex token, you can calculate the dividend here
4. Basic attention token (BAT)
bat mainly solves the problem of advertising:
user information is abused: large companies such as Google and Facebook track and use user information and behavior, and sell without the knowledge of users
the effect of advertising is restrained: middlemen earn most of the fees, a large number of advertisements are blocked by users using software, and advertisements are fake
in the past six to 12 months, the number of publishers using the brand browser (Note: the brand browser supports bat token) has grown rapidly, and almost no blockchain ecosystem has grown so fast
5, chainlink (link)
chainlink mainly solves the problem that each blockchain has and the smart contract cannot obtain external data. In order to introce external data into the blockchain, the concept of Oracle is proposed in smart contract
companies including Google are supporting the development of chainlink. Here is a list of chainlink partners
one of the main problems of chainlink is similar to Ethereum. The development team has reserved 650 million link tokens, while only 350 million are in circulation at present
Ethereum (ETH)Ethereum has long occupied the second place in the top 100 cryptocurrencies. Its ecology is so big that we can't call it altcoin now. To tell you the truth, I'm not optimistic about Ethereum in the long run, but it will flourish in the short run
The people's Bank of China has not issued digital currency for the time being, so there is no legal digital currency in China at present. At present, digital currency has not been recognized in China, let alone legal
at present, all kinds of digital currencies circulating in the market are basically on the edge of the law. China maintains a neutral attitude, but does not like speculation, which is also the basic attitude of the central bank{ RRRRR}
< H2 > development materialsdigital currency is abbreviated as digiccy, which is the abbreviation of "digital currency" in English and the alternative currency in the form of electronic currency. Both digital gold coin and cryptocurrency belong to digiccy
digital currency is different from the virtual currency in the virtual world, because it can be used for real goods and services transactions, not limited to online games. The early digital currency (digital gold currency) is a form of electronic currency named after the weight of gold. Today's digital currency, such as bitcoin, lightcoin and ppcoin, is an electronic currency created, issued and circulated by check sum cryptography. It is characterized by the use of P2P peer-to-peer network technology to issue, manage and circulate currency. In theory, it avoids bureaucratic examination and approval, so that everyone has the right to issue currency
It is not currently available
at present, the Central Bank of China has not issued and approved the digital currency of issuers and investors
However, at the beginning of the year, the central bank held a seminar on digital currency, at which it made it clear that it was necessary to issue digital currency as soon as possible, and the central bank put the issue of digital currency on the agendahowever, so far, the central bank has not issued any digital currency, and Zhou Xiaochuan, the governor of the central bank, said that the time is not ripe to issue digital currency. Moreover, the digital currency issued by the central bank is different from bitcoin, Ruitai, Laite and other digital cryptocurrencies, and the digital currency issued by the central bank is not decentralized
when the central bank issues digital currency, it needs to establish a basic digital currency system. In this system, the central bank is in charge of the digital currency issuing bank, the commercial bank is in charge of the bank, and the public and indivials hold digital wallets. This is not much different from the existing monetary system in essence, but the managed currency is changed from paper money to digital cryptocurrency
in terms of issuing mechanism, there are two modes:
one is the traditional mode of "central bank commercial bank", that is, the central bank issues digital currency from the issuing bank of the central bank to the Bank of the commercial bank. When an indivial withdraws money from the commercial bank, the digital currency is transferred from the commercial bank to the personal digital wallet
another mode is the "central bank public" mode, that is, the central bank can directly issue digital currency from the currency issuing bank to the digital wallet of the public and indivials. In essence, no matter which issuing mode, money is ultimately held by the public, which is the debt of the central bank to the public
The digital currency issued by the central bank is also legal currency, which is no different from RMB! There is no room for BTC to rise! Nothing to look forward to, just wait< br />
according to the market in 2020, the price of the month center generally ranges from 20000 to 150000 nationwide
the key lies in the city and central hardware facilities. There are many factors that affect the standard price of the center. Generally, the standard price of the center varies with the scale, environment and package
the cost of the confinement center is relatively high, ranging from 40000 to more than 100000. The more luxurious the decoration, the higher the price
in the confinement center, the baby care service is provided. When the puerpera need the care service, the baby can be taken care of by the nurse, so that they can spare time to recover their body and get a good rest
selection method
the number of confinement centers is large, but most mothers don't know much about them, so it's very important to know about them. From an expert's point of view, the services and facilities of confinement centers are definitely more professional than looking for a sister-in-law, but the cost is higher, In fact, many mothers with good family conditions want to choose the confinement center, but they are afraid that it is not worth the money
for the instry of confinement center, experts put forward several good suggestions for mothers to refer to. Choosing the way of confinement should be considered according to their own situation:
first, the family's economic conditions are not good. If the family can take care of themselves and their baby, they can choose to take care of their family. At most, they can hire a nanny and buy more books, Let family members and nannies learn some maternal nutrition meal practices and baby care knowledge. It is not recommended to buy the monthly meal, which has been exposed by most media
Second, the family's economic conditions are general, so it is not recommended that the family take care of them. After all, the quality of confinement is very important to their recovery and their baby. Parents' concept of confinement is somewhat traditional, which is not consistent with young people's opinions, and it is easy to cause conflicts. After multiple interviews, they need to reserve their sister-in-law in advance, but it is more difficult to find a good one, because most of them are from rural areas, Lack of professional knowledge of baby care Third, the family conditions are good, and you can choose to sit in the confinement center. There are more than ten confinement centers in Shanghai, with different positioning. Most of them are invested by indivials, and the service is good and bad, so it is not easy to choose a suitable confinement centerjiandiao.com
50 famous sayings about dreams
life needs dreams, otherwise, what's the difference between them and salted fish? The following sentences about dreams are very worth reading. I wish your dreams come true in 2020
1, ordinary and simple dream, we use the only belief to support the dream—— Anonymous
2. Under the starry sky, sitting on a merry go round, I didn't give up. The dream of my life, I'm still pursuing, flying to the starry sky with my own wings. Rely on their own words, write down dazzle rotten. Realize your dream on your own. I used to have a fragmented world. In exchange, I have a sunny world now
3. Now, the sun is shining. Maybe that dream is not broken. It still exists. It's just metamorphosis. After nearly seven years of waiting, a new dream once again occupies all of my life
4. Now everything is to weave wings for future dreams, so that dreams can fly high in reality—— Anonymous
5. A person who has lost his dream is like a lonely meteor, who doesn't know where to go. For the sake of my dream, I am willing to give up my life and regard art as life like Van Gogh. In order to dream, he suffered a lot and suffered countless setbacks. Graally, the spark of dream is weak
6. Sleep can only dream, only work hard can realize the dream
50 famous sayings about dreams; Keep dreaming, but don't inlge in it. Let the dream dance a hearty dance in reality< The drawback of dreamers is that they are afraid of fate—— A person can be very poor, difficult and humble
To calculate the helical gear parameters, you need to know the basic parameters:
normal molus M_ n. Number of teeth Z, normal pressure angle α_ n. Helix angle β
generally, the crown height coefficient h * is 1, and the root height coefficient C * is 0.25. If there is displacement, it is necessary to calculate the displacement: x
the following is the basic parameter
end face molus: M_ t=m_ n/cos β
Calculation formula of pressure angle at the end face: Tan α_ t)=tan ( α_ t)/cos( β)diameter of dividing circle: D = m_ n × z/cos( β)
addenm circle diameter: no displacement: Da = D + 2 × m_ n × H * with displacement: Da = D + 2 × m_ n × H * + x)
root circle diameter: no displacement: DF = D-2 × m_ n ×( H * + C *) with displacement: DF = D-2 × m_ n ×( H * + C * - x)
diameter of base circle: DB = D × cos α_ t)
in addition, there are more important dimensions, such as normal pitch, end pitch, etc., which can be obtained by referring to relevant manuals
Extended data:
judgment of helix rotation direction: first, we make the gear axis vertical, if the right height of helix is right rotation; On the contrary, the height on the left side of the helix is left-handed
end face and normal surface parameters:
end face: the plane perpendicular to the gear axis, and the parameters on the end face are generally added with subscript t
normal plane: the plane perpendicular to the helix, and the parameters on the normal plane are generally subscript n
(1) pitch and molus: = t= π
(2) pressure angle: generally, the parameters in normal plane are standard parameters
The correct meshing condition: the helix angle must be equal in size and opposite in direction. The normal molus m is equal to the normal pressure angleB. geometric dimension calculation: in calculation, the calculation formula of spur gear can be directly applied to the end face of helical gear because a pair of helical gear transmission is equivalent to a pair of spur gear transmission on the end plane
there are many kinds of gear transmission, among which the efficiency of helical gear is very high, for example, the efficiency of spur gear transmission is lower than that of helical gear transmission
Like spur gear mechanism, helical gear can be used to improve the load capacity of transmission by recing the center distance a, which can be used for high-speed operation. Helical gear recer is a new type of recer. The helical gear recer is small in volume, light in weight and good in economy Advantages:(1) good meshing performance: the meshing process between helical cylindrical gears is an excessive process, and the force on the teeth is graally from small to large, and then from large to small; Helical gear is suitable for high speed and heavy load
(2) large coincidence degree: the increase of coincidence degree can improve the bearing capacity of gear. So the life of the gear is prolonged. The coincidence degree mainly depends on the meshing time, while the long meshing time and large contact area of helical gear rece the stress. The transmission is stable and the economy is increased
(3) compact structure: the less the minimum number of teeth, the more compact the structure