Pithy formula of virtual currency
on November 1, 2008, the hermit named "Nakamoto Tsung" watched the sky at night. Seeing that the time was ripe, he announced his new idea of issuing an electronic currency called "bitcoin" on a secret cryptography forum
then, in 2009, bitcoin was born
for a while, there were rumors all over the world:
"what is bitcoin?"
"what's the magic power of bitcoin?"
"can it compare with traditional currency?"
it's just a hermit's "masterpiece left behind". Why did it make such a big stir in the world<
it turns out that this bitcoin has risked the world's great injustice, escaped the high-ranking government control, and set up a "small autonomy" on its own:
bitcoin no longer needs to be issued by a specific institution, but is generated through a set of "institutions" designed by Nakamoto Tsung, which is based on a specific algorithm and through a large number of calculations. Regardless of the world, as long as you have a computer, access system, and operate the "organ", you can become a "coin digger"
a thousand waves were aroused for a while, and an undercurrent was set off in the river and Lake: men, women, old and young were yearning to invest in the "money digging fever"<
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but since ancient times, unique martial arts skills have come out, and most of the onlookers will see through them, but fengmaolingjiao is the one who really understands the mystery
in the same way, this "coin digger" who creates miracles is not something ordinary people can do at will. Even if everyone has a computer and computing tools, it depends on talent and hard work to generate a new bitcoin
if every "digger" wants to dig bitcoin, he has to go into many "mechanisms" of Nakamoto Tsung and use computers to solve a complex mathematical problem through huge calculation. This is far from enough. Whether we can understand the secret is not only related to the ability of the "coin digger", because the "mechanism" will automatically adjust the difficulty of the questions, so that the whole system will get a qualified answer every 10 minutes, while the vast army of "coin diggers" are crazy computing. Who can understand the secret depends on the nature
it's like buying lottery tickets. Everyone is crazy to generate various combinations of numbers with computing tools in hand. Whoever can guess the same string as the big prize will be the winner
in the end, the lucky person who was lucky enough to get a specific solution successfully created a bitcoin, and the reward for him was a total of 50 bitcoins
at this time, someone will ask, is bitcoin hard to get out of the endless mining
this is the true wisdom of Nakamoto's seclusion
like all kinds of gold, silver, iron and copper veins, bitcoin will be g out one day. A total of 21 million mathematical problems have been designed in the "mechanism" and 21 million corresponding qualified answers have been matched. In other words, the upper limit of bitcoin mining is controlled at 21 million
Where is the mystery
we know that the reason why the government calls the wind and the rain is precisely because it has the power to issue currency. Increasing and recing issuance are "fierce moves" to regulate the economy
and Nakamoto's restriction on the total amount of bitcoin has cut off the way for bitcoin market to be regulated, which is obviously the opposite
which is better? There are two schools in the world:
"supporters" think that eliminating intervention is a sign of social progress
the "losers" feel that fixed aggregate may lead to deflation, which in turn will lead to a series of market weakness and "bone breaking" of the overall economy
the merits and demerits will be left to future generations
since there is a reward for digging coins and the total amount is limited, isn't the mine going to be g through in just a few days
How could the "mechanism" that he had painstakingly researched be easily manipulated by the world<
Nakamoto has two rules under the "agency" neutrality:
first, the more bitcoin, the less reward
- when the total amount reaches 10.5 million hours (50% of 21 million), the reward will be halved to 25. When the total amount reached 15.75 million (5.25 million new output, or 50% of 1050), the bounty was further halved to 12.5. And so on
secondly, the more the total number of "coin diggers", the lower the efficiency
in this way, bitcoin will be proced more slowly in the later stage. According to the plan, from the birth of bitcoin in 2009, mining will last more than 100 years, and it will not reach the upper limit until 2140
today, the total amount of bitcoin mined out in the world is just over 16 million
all of the above are just a set of "mechanisms" carefully arranged by master Nakamoto. There is another set of "mechanisms" with such precision
bitcoin is a rare thing in the world, so how to trade it? How to manage
after living in seclusion for many years, Nakamoto studied cryptography, a unique security process for bitcoin circulation
the transaction behind bitcoin is very complicated. Bitcoin can generate bitcoin addresses randomly, and each address has a corresponding private key, which is equivalent to the bank card number and the corresponding password. Only when you have both can you manage your money
but is the complexity of this address comparable to that of ordinary bank cards
how confidential is the bitcoin address
each address is made up of a string of letters and numbers about 33 bits long, always starting with 1 or 3
how many such random addresses are there? The answer is: probably more than the sand on earth
it's not easy to break such a complex "secret protection system"
in this way, with the second "organ" blessing of Nakamoto Tsung, bitcoin circulation has more security than ordinary currency
it's no wonder that with the advent of bitcoin, the currency world is shaking, and a new fight is in the dark
bitcoin, like countless secret lone Rangers, grows savagely under the authority of the government. According to the legend, bitcoin is free (decentralized, tax-free, regulatory free), strong (relying on P2P network, external can not be closed), omnipresent (cross-border, borderless), and anonymous
you can understand, "freedom", "coming and going without name" and "omnipresent", which means that bitcoin can not only be tracked and supervised by the government, but also grow wildly in the world. It's a great way for hackers to blackmail
moreover, since last year, bitcoin has been rising wildly, and hackers all over the Internet know this information well
there is no doubt that bitcoin is a safe and profitable way to blackmail
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or like this< But all the martial arts in the world are strong. Bitcoin also has weaknesses
there are three pithy formulas:
first, bitcoin network is not broken, and trading platform is fragile
Second, the "black market" trading, speculation rampant, price roller coaster day by day
thirdly, it is difficult for ordinary people to understand the secrets of nature because of their profound martial arts
in particular, the third point is that although the Kung Fu is good, the threshold is too high, which is lamentable
then, if you look at China today, where is bitcoin going
to be fair, in the eyes of the mother of the central bank, it is not too much to say that bitcoin is a barbaric growth: in the past year, with the devaluation of RMB, bitcoin has once again become the target of investors' speculation, and its value has increased by 120%
smart passers-by have already seen through everything
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coupled with the emerging bitcoin virus, it seems that it is time for bitcoin to be subject to a wave of regulation.
1、 The silver quality distinguishes the false. After cleaning, the real silver coins are white, and the hardness of the silver coins is low. The two pieces of silver coins are overlapped and rubbed with each other, and there is a feeling of oil lubrication. There is no sound of metal bumping (except for foreign silver coins or uneven silver coins). The color of fake silver coin, iron and steel, copper and lead, aluminum and tin, or metal powder cement is dark and ll
(2) distinguish the false by listening. The soft and clear voice is the real silver coin, the sharp voice is made of steel, the hoarse voice is made of copper tin alloy, the ll voice is made of silver and copper, and the silent voice is made of metal powder and cement Third, the identification of Baojiang. There is a layer of silver oxide on the surface of the handed down silver coins, which is commonly known as the slurry. The slurry mainly includes light black, light gray, light orange and millet shell color. Wipe with shoe polish and wax fire barbecue out of the slurry is heavy black, one can see (4) rust color discrimination. Silver coins will rust if they are not stored properly after they are out of circulation. Handed down Silver Round rust layer is very thin, dark green. Generally speaking, the rust layer of the unearthed silver coins is thick, and the rust layer is raised locally. Two silver round rust together, knock open, the surface has uneven distribution of white bright spots, meet the light and see glittering, commonly known as "Pan silver"
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extended data
keep silver coins
try not to touch the surface directly with your hands, because sweat stains on your hands will pollute the surface of silver coins. It's better to seal the silver coins with sealed plastic, so that it's more convenient to watch the silver coins, and it won't let the st in the air pollute the surface of silver coins. Try not to collide with each other, because they are easy to leave traces
if the silver coin is soiled, it should be slightly cleaned in warm soapy water, then washed with clean water, then gently dried with a soft cloth, and finally placed in a dry and ventilated place; Try not to wash with very light alkaline water or brush. Alkaline will easily corrode the surface of silver coins
it is necessary to place color changing silica gel in the place where silver coins are stored, which mainly plays the role of absorbing moisture; When dry, the silica gel is blue and will turn red after absorbing moisture. It's better to put it in a safe with anti-corrosion and moisture resistance
reference materials
network silver coin
Network yuan Datou
on the left side of the leader's watermark ticket, you can see it from the perspective of light; The red and blue fibers are reflected on the face of the bill, as thin as the hair in the middle of the note.
the safety line in the middle is to the left, and the micro characters are printed on the top; The light changes to the lower left side of the number, the rotation angle and the color change.
the right side of the carved head is vivid; The two sides of the banknote should be divided equally.
the two sides of the banknote should be distinguished from each other; On the front of the microfilm, you can see it in many places.
the upper right side of the hidden face, if you want to see the face turned to the slope; Gravure Engraving front and back, the main scene line illiterate point
1 yuan, 10 angles, 1 angle and 10 minutes. In the city of China, the common use of "Yuan", "Yuan", "the above," and "a," is "a lot", "a", "hair". There are many sayings in the area of the East. P >
Hong Kong, the general government organization interest story "port yuan", the people who say "the mosquito", and the last work "sentence", can be called. Europe, government named Europe. Mikuni, government name mimoto. In Japan, the general use "circle" is the traditional character of the Chinese character, "Yang," and "Hong Kong" P >
. The main purpose of the European Union is the European Union. Europe is a country official country in Europe. On January 1, 1999, the original use of the original yuan in Europe was completed. In the near future, Europe and Yuan were in the form of trade, and they were used for financial and foreign trade. In the past three years, the empress and the European generals were all in the form of cloth and hardness. The United States of America: the countries of the province, the law country, the Himeji, the Mori mori, the land of the earth, the land of the earth, the land of the earth, the cargo, the great, the west, and the grapevine P >
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2; Fen, Jiao, yuan
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4. The relationship between ecation and them, one yuan = ten jiao (two five jiao / five two jiao / ten one jiao)
5. Life specific ecation. If the student has one yuan, how much is left for the notebook? So it is
6. The conversion of RMB should be in mathematics class. To increase students' interest, for example, when you ask students in class, I have brought 15 dimes in my life, lost one on the road, and used five to buy soda. How many do I have? Let's see who works it out first
are you a teacher or a parent. It's quite good. Hope to help you
If I feel lucky and miserable, I will be rewarded, ha ha
RMB 2 million is read as RMB 2 million
200.000000, because there is a decimal point to separate the integer part and the decimal part of the number
The integral part ofis 200, and the decimal part is 0,
so 200 million = 200
then RMB 2 million is actually RMB 2 million
therefore, RMB 2 million is read as RMB 2 million
extended materials
in Europe and Islamic countries, the decimal system of Cuban Babylon has been dominant for a long time, and some classic scientific works adopt the decimal system, so the concept of decimal system has not been developed. Alkasi in Central Asia in the 15th century 1429) was the first person outside China to use decimals
It was not until the 16th century that European mathematicians began to consider decimals, especially Steven (1548-1620), a Dutchman, who clearly expressed his idea in his book on decimal system (1583) For example, 5.714 is recorded as 5 7 ① 1 ② 4 ③ or 5,7 & # 39; 1' 39; 4' 39; 39; The first person who expressed the decimal as the common form in the world today was the German mathematician Kravis (1537-1612). In his astrolabe (1593), he began to use the decimal point as the dividing line between the integral part and the decimal partAnalysis: according to the meaning of the title, find out that one coin can make up several different currency values, two coins can make up several different currency values, and three coins can make up several different currency values, so we can get the answer
answer:
(1) the different values of a coin are: 1 jiao, 5 jiao and 1 yuan, totally 3 kinds
(2) the two coins can be divided into three kinds: 6 cents, 1 yuan and 1 jiao, 1 yuan and 5 jiao (3) the different values of the three coins are: 1 yuan and 6 jiao, one kind in total; The total number of coins that can be formed is: 3 + 3 + 1 = 7 (kinds)A: seven different currency values can be formed with three coins, one dime, five dimes and one yuan
comments: the key to solving this problem is to write down the different currency values when finding out that one, two and three coins can form several different currency values, so as to avoid repetition and omission
C(n,m)=C(n,n-m N ≥ m)
other permutation and combination formulas take M elements from n elements, and the number of circular permutations of M elements = a (n, m) / M = n/ m(n-m)!. N elements are divided into k classes, the number of each class is N1, N2,... NK, the total permutation number of these n elements is n/ n1 × n2 ×...× nk!). The number of k elements in each class is infinite, and the combination number of M elements is C (M + k-1, m)
some collectors ask if your unit is qualified for cultural relics auction? This is a question with little knowledge. As long as your collection is not purchased from a cultural relic store, 98% of domestic auction companies and art management companies can auction and trade for you
the auction qualification of cultural relics is the company designated by the state to trade cultural relics, and the collection in the hands of ordinary people has nothing to do with cultural relics
in 2015, in order to encourage the development of the cultural market, the state banned the obstacles of various qualifications, and any unit registered in the instry and commerce can operate art business<
collection auction transaction reference 3: Crazy chaotic identification
about the current chaotic antique identification, an antique can be shown to eight experts, and each expert has his own point of view, so don't tangle, the collection will be put on the market, and someone will buy it. This is the truth, Many experts cheat people by collecting appraisal certificate fees, and the machine testing is operated by people, cheating them to collect appraisal fees. Many collectors buy a lot of identification certificates for their collections, but in the end, no one wants them. In view of the crazy chaotic identification market, buyers believe in their own eyes to buy the collection. As a collector, as long as the collection can be put into a reliable unit, it is equivalent to more than half of the success<
collection of auction transaction reference 4: auction risk
auction risk, we recommend that you participate carefully, top brand units in recent years, the real payment turnover rate is less than 50%, the overall market is not optimistic
if you have a collection, you should try your best to find the owner of the antique city to sell it, or set up a stall to dispose of it. "Auction" belongs to venture capital, which is not suitable for ordinary people to participate in. Especially, the company that calls you every day is not worth your collection. It's mainly for collecting your map recording fee, identification fee, customs clearance fee, deposit and other traps waiting for you, Domestic regular units, who talks to you, who calls you? For some collectors with low income and financial difficulties, wake up. Millions or tens of millions are not so dreamy
collection auction transaction reference 5: correct judgment
Tibetan friends ask whether a certain company is formal? Is it a liar? Is it reliable
Any unit is registered and operated by law. As for the service quality and charging standards, we have to examine and measure them by ourselves. We must be careful to avoid the harm caused by high charges and non transaction
in particular, companies boasting that they can make a deal are likely to cheat on fees
according to the law, regular units are not allowed to buy and resell antiques. Secondly, indivial units buy antiques in the name of cash, so that collectors can identify them first, and then buy the real ones in cash. In fact, they have no buyers. After cheating collectors to pay the identification fee, once the collection is identified, they deliberately tell you that the thing is fake<
collection auction transaction reference 6: abnormal fortune mentality
because many farmers who are lack of knowledge and family difficulties are lured by the huge valuation, they pay 200000 service fee first for the 20 million value of the collection. They think that as long as I make up 200000, they will get it, so they have mortgage property, sell off proction tools, cattle and sheep, They borrowed it from the West. After giving 200000 yuan to the auction company, they quit their jobs and their fields were in short supply. They were busy booking famous BMW cars, planning to buy villas and waiting for money to change their wives. Blind participation leads to the destruction of families
it's a very simple problem. Many collectors have problems in their analysis. Just imagine that if you entrust four things and at least one transaction can be made, you will be a millionaire immediately. If it's so easy to get rich, simply sell your house and entrust 100 things, and at least two things can be made. It's also cost-effective to get 5 million, right
in this year's auction, only two of Qi Baishi's ten paintings were sold. Is that also a liar? If you want to close an antique auction, you have to participate more
Why didn't poly and Jiade accept things from low-end collectors? Because they were happy when the deal was done and failed, they said that they were cheaters,
they paid for some things, and some things were not easy to deal with, which led to the collectors' depression. The conclusion is that cheating is unreasonable<
collection auction transaction reference 7: comparative strength
regular units [like the regular poly Gardner, they are offices with an area of nearly 1000 square meters, and the collections are placed in the office and art hall. Buyers can see them as they come] in addition, 95% of the small auction units in the instry rent a small office with an actual use area of 60 square meters, and after signing the entrustment contract for the collections, they can rent a small office with an area of 60 square meters, Stack nearly a thousand pieces of the collection in a damp basement and store them in the dark for half a year. Then wait until a few days after the auction to take out the collection and rent a venue in a hotel or hotel for 5000 or 6000 yuan. If you hurry up for a preview for one or two days, you will be able to complete the auction. This way, you have almost no hope of selling things<
collection auction reference 8: what is a reliable auction
at present, 90% of the auction companies, auction proceres, early collection, collection, frequent phone calls, brainless people to participate, after collecting 1000 pieces, they begin to prepare for the auction. The whole process of the auction is to rent a venue in a hotel for two days and show 1000 pieces of the collection, It's like a preview to see if the hotel guests want anything
in the two-day preview site, if you observe carefully, the people who went to watch the collection, except dozens of clients who wandered back and forth in the preview site, hardly any buyers came to watch, and the two-day preview ended
on the third day, the auction started, and 95% of the people present at the auction venue were collectors' clients, that is, people selling things. In order to cover up the collectors, such auction companies paid 100 yuan to hire some unemployed vagrants, the old, the weak, the sick and the disabled to act as buyers and hold up brands<
I have participated in seven auctions, and I often see some buyers of auction companies snatching milk and bread on the spot at noon
they are in a mess, and they ask secretly after the auction, which belongs to the unemployed low-income insurance households
the common people with a little thought can see the way. Secondly, if a small auction company rents a 100 square meter office without inviting investment, how can the buyers sell things to you? To tell the truth, it's not as good as setting up a stall by yourself<
reliable auction is to observe the actual business mode of the company, and specifically provide real services that can be seen for collectors. Services that can't be seen are fake and unreliable<
collection auction transaction reference 9: look at the service and market
[reference: Xinhua brocade auction]: the auction company is a service instry. If you want to be excellent, you should first provide good service to meet the needs of all kinds of collectors,
First: for high-end collectors, we provide high-end star service
Second: for low-end collectors who are in financial difficulties, we provide medium grade service without transaction and charge any fees, so that collectors can easily participate and art can enter into life<
quotation: the bad phenomenon of China Jiade auction needs to be resisted. To change the atmosphere, we should learn, discuss and study with each other. Collection lovers should improve their own level, further deepen the collection culture, and enter the cultural field, rather than simply collecting. Collection can not only be for economic interests, but for hobbies and inheritance of our country's culture. In a few years, the economic benefits it will bring you are only added value. The confusion of the cultural and museum system also leads to the confusion of the market and the collection<
collection auction transaction reference 10: reasonable valuation
if the collection wants to be sold, it must be properly valued, and the price should be in line with the market situation, so there is a chance to trade anywhere
[quotation: Qing daqianmen group auction]: about collection Valuation: Generally speaking, there is a beautiful daughter in your family who marries an ordinary person. The common people are more casual. If you marry a village head, there will be only one village head in each village. You can have the opportunity to marry a county head, and you can expect to marry a mayor. Do you think it's good to marry a mayor------- For many immature collectors, the ideal of valuing their collections is not to marry their daughter to the governor. To auction a low-end collection for millions or tens of millions is undoubtedly to marry their daughter to the president of the state
poly auction: the market value of the collection is created by the collection itself, and the era of speculation is about to pass