Ethereum title
many new users believe that the sole purpose of mining is to generate ether in a way that does not require a central issuer (see our guide "what is ether?"). It's true. The token of Ethereum is proced in the process of mining, with a mining rate of 5 Ethereum coins per piece. But mining is at least as important. Usually, banks are responsible for keeping accurate records of transactions. They make sure that money is not created out of thin air and that users don't cheat and spend money many times. However, blockchain introces a new way to keep records, the whole network instead of intermediary, to verify transactions and add them to the public ledger
Ethereum mining
although "no trust" or "trust minimization" monetary system is the goal, there are still people who need to ensure the security of financial records and ensure that no one cheats. Mining is one of the innovations that makes decentralized records possible. Miners have reached a consensus on the history of transactions in terms of preventing fraud (especially double spending on ether) - an interesting issue that hasn't been addressed before the decentralized currency works on the blockchain. While Ethereum is looking at other ways to reach a consensus on the effectiveness of the deal, mining currently keeps the platform together
how mining works
today, the mining process of Ethereum is almost the same as that of bitcoin. For each transaction, the miner can use the computer to guess the answer repeatedly and quickly until one of them wins. More specifically, the miner will run the unique header metadata (including time stamp and software version) of the block through the hash function (which will return a fixed length, unordered string of numbers and letters, which appears to be random), changing only the 'nonce value', which will affect the hash value of the result
if the miner finds a hash that matches the current target, the miner will be granted ether and broadcast the block across the network for each node to verify and add to their own ledger . If miner B finds the hash, miner a stops working on the current block and repeats the process for the next block. It's hard for miners to cheat in this game. There is no way to fake the work and come up with the right answer to the puzzle. That's why solving puzzles is called "proof of work."
on the other hand, others have little time to verify whether the hash value is correct, which is exactly what each node does. About every 12-15 seconds, a miner finds a stone. If the miner starts to solve the puzzle faster or slower than this, the algorithm will automatically re adjust the difficulty of the problem so that the miner can rebound to about 12 seconds of solution time
miners earn these ethers randomly, and their profitability depends on their luck and the computing power they put in. The specific workload verification algorithm used by Ethereum is called "ethash", which aims to require more memory, making it difficult to mine with expensive ASIC. Special mining chips are now the only profitable way to mine bitcoin
in a sense, ethash may have achieved this goal successfully, because dedicated ASIC is not available for Ethereum (at least not yet). In addition, as Ethereum aims to shift from proof of work mining to "proof of equity" (which we will discuss below), buying ASIC may not be a wise choice because it may not prove useful for a long time< However, Ethereum may never need miners. Developers plan to abandon proof of work, the algorithm currently used by the network to determine which transactions are valid and protect them from tampering to support proof of equity, which is guaranteed by token owners. If and when the algorithm is launched, proof of equity can become a means to achieve distributed consensus, and the consensus uses less resources.
"the times 03 / Jan / 2009 Chancellor on brink of second low for banks (on January 3, 2009, the chancellor of the exchequer was on the verge of implementing the second round of bank emergency assistance)."
at that time, the British Chancellor of the exchequer, darling, was forced to consider a second attempt to relieve the banking crisis, which was the headline of the front page article of the times that day
the time stamp service and existence proof of blockchain, the time generated by the first blockchain and the events that happened at that time are permanently preserved
BTCC, a bitcoin company, launched a service "Millennium chain" in 2015, namely blockchain lettering service, which is based on the above principles. Users can use this service to engrave text on the blockchain and save it permanently
bitcoin, Ruitai coin, Laite coin, dogcoin, Ethereum and other digital currencies will use blockchain technology.
1. Since 1974, Zhao Dayu, a famous football player, failed to apply for the provincial professional football team several times because of his short stature. His repeated failures made him feel confused and frustrated
at this time, Zhao Dayu's father is even more unhappy. Which parents don't want their children to go out and cast their children? However, he deeply understands that it is terrible for a person to lose opportunities, but what is more terrible is to lose faith. What his son needs at this moment is encouragement and support
therefore, he tried to restrain his feelings. In order not to let his son lose confidence and give up his efforts, he told his son the story of "lying on the staff and tasting the gall", and encouraged his son to bite his teeth, not to admit defeat easily, and to be a man of backbone
he also introced the story of Hu Denghui, a football player, to his son. Although he was small, because he played very well, he still entered the national team. He also took his son to see a Guangdong Star, and asked him to introce the unique skills of small men playing big men. He tried every means to make his son establish such a belief: "as long as you are better than others, someone will come."
with the encouragement and support of his father, Zhao Dayu regained his confidence and never gave up his efforts. Hard work, and finally won the initial harvest. In 1975, Zhao Dayu entered the Guangzhou team and participated in the National Youth Championship
although he has always been the best player in the junior team of Newell's old boys, Messi was only 3500px at the age of 12. According to the doctor's examination, he suffered from congenital dwarfism and stopped growing at the age of 11
Messi's dwarfism is not incurable, but the monthly cost of injecting growth hormone is as high as $900. The old man of Newell, the parent team, is not willing to pay for a child whose future is uncertain. He once coveted Messi's river bed, and when he learned of his stubborn disease, he gave up the idea of poaching
"I remember and will never forget the day when I got the diagnosis. It was very cold at that time. We were in the street. Messi didn't have any expression and was very calm. I know he knows better than anyone that there is no ability for him to be treated at home
father Jorge recalled, "as a father, I know that Messi's illness is e to malnutrition. Argentina is rich in the best beef in the world and has the best cheese in the world, but that doesn't belong to us
Macy grew up eating potatoes and carrots and playing football after drinking soup without oil foam. He never complains. No one knows that better than me when he is young. "
In September 2000, he joined the Barcelona youth team at the age of 13 and height of 140cm with his superb skills. In the first game, with his skillful footwork and excellent dribbling ability, he won over thousands of spectators in the standsin the stands, there were thunderous applause and screams! Father was even more excited to tears. However, after the surprise, the father's heart is boundless desolation and despair. The height of 140 cm doomed my son to have nothing to do with football. The more perfect his footwork is, the more regret and pain he brings to his father
4. Lovely buckteeth and skillful football skills may be the impression of many fans on Ronaldinho. Now that Ronaldinho is getting older and his form is declining, people graally forget about the post-80s football superstar
Therefore, it is necessary for the post-80s inspirational network to review the brilliant achievements of Ronaldinho in this article: he won the World Footballer of the year in 2004 and 2005 for two consecutive years; In 2005, he was elected European Footballer of the year and became the best player of the first international professional football association in the same yearRonaldinho's football career is absolutely a classic inspirational model of the post-80s generation: on March 21, 1980, Ronaldinho was born in a family with a strong football tradition in Porto Alegre, a small city in Brazil. Just like the growth process of many Brazilian international players, Ronaldinho's family has an unusual passion for football
my father used to be a football player, my mother was a fan, and my brother was also a football player. Influenced by his family, Ronaldinho began to play football when he was very young. He even played with his dog
Luo said: "as soon as my mother comes to Sunday, she will take her homemade Bento and go to the stadium to enjoy football with us. When I was a child, I always felt like a happy child. " Ronaldinho's happiest life every day is to go to the football field, and from the slum cottage to the stadium is Ronaldinho's most common route
The family was not rich when he was a child. When his father was 8 years old, his mother shouldered the burden of the family life. "Overnight, we didn't know what to do, the pillar of the family was gone, and the future was goneat this time, my brother woke me up and said that I had the responsibility to make the family life better. " Xiao Luo, who grew up overnight, completely changed his temper. He no longer relies on cleverness to show off his footwork. He has a sense of crisis to practice every skill well
At this time, Ronaldinho is looking forward to following his brother Robert Assis's footsteps to achieve success. His brother played in Porto Alegre's Gremio and was selected for the Brazilian national team In 1997, the World Youth Championship held in Egypt became a brilliant stage for Ronaldinho, whose name made the headlines. He showed his skill in that cup and defeated Ghana 2-1 in the finalRonaldinho, who scored seven goals in this cup, was named the best player and became the best shooter of the champion team, which was the first best in his football career. His name was known all over the world for a while, and this success opened a new chapter in Ronaldinho's career
after Ronaldo, Ronaldinho has been hailed as another outstanding Brazilian new star. "The honor made me more confident and opened the door to the world's top football clubs," Ronaldinho recalled
In 1998, Ronaldinho signed his first contract with Gremio. He took the first step towards success, which soon earned him a place in the national teamwhen Ronaldinho entered the Brazil national team and scored the first goal, his celebration was to point his finger to the sky, look up for a long time, as if to tell his father's spirit in heaven: your dream has finally come true. Since then, every time Ronaldinho points to the sky after scoring, it means that he wants to dedicate the goal to his father
Ronaldinho's eye-catching performance in international competitions has attracted the attention of many European giants. Different from many famous Brazilian international players who started from low-level or minor league matches in Europe, Ronaldinho has only played for Gremio, Paris Saint Germain, Barcelona and AC Milan
in Gremio, he was already compared with Pele. Maradona said that Ronaldinho is more flexible than Pele, more agile than Zico and more practical than Denilson
for comparison, it is natural that everyone has their own opinions. However, no one can deny Ronaldinho's talent and efforts. Ronaldinho's superb skills have been praised by many of his predecessors. Maradona called Ronaldinho a "football artist"
On July 19, 2003, Ronaldinho joined Barcelona for $28 million. When Laporta accompanied him to the stadium, about 30000 fans cheered their long admired idols in the stands, and all the jerseys printed with Ronaldinho's name sold outafterwards, Ronaldinho enjoyed himself in this top European club, and the Brazilian began to show his fists in this fertile land of football. His arrival also injected new vitality into the sick Barcelona. In the match with Sevilla, Ronaldinho took the ball from the back field to the front 25 meters, which was his debut in La Liga
Ronaldinho scored a hat trick in the 8-0 UEFA Cup victory over Slovakia's puchev. In his first season, Ronaldinho helped Barca not lose in 17 league matches in a row, and finally won the second place in the league and the chance to advance directly to the Champions Leaguesince 2006, e to the long-term nightclub life, the state has dropped sharply, until the 09-10 season finally began to recover, the 11 season performance was brilliant and returned to the Brazilian national team, we look forward to more surprises from Ronaldinho
Didier Drogba is undoubtedly one of the greatest players in the world. This young Ivorian, who was elected "African Footballer of the year" in 2006, never forgets to call for peace with the charm of football, and has made the world look up to him with his unique bravery again and again On December 13, 2013, Drogba represented Galatasaray in the Turkish Football Super League, which coincided with the death of former South African President Mandelain the middle of the match, Drogba suddenly took off his shirt and revealed a T-shirt printed in memory of Mandela, which said: "thank you, Mandela!" His move is a clear violation of FIFA's stipulation that "indivials are not allowed to express their political inclination ring the competition"
Then, the Disciplinary Committee of the Turkish Football Association announced that Drogba would be given a warning. As a result, Drogba has become the only star in the world who bravely salutes and mourns Mandela on the field In response, Drogba said: "for peace, I don't care how severe punishment I am given. I have to use my own way to send off and mourn the old man who has been fighting for the abolition of racial discrimination all his life, so as to express my highest respect for him." This is not the first time Drogba has made a special move. On October 8, 2005, Didier Drogba's Ivory Coast National team beat Sudan 3-1 in the last group match of the world cup preliminaries to get the ticket to enter the world cupas the captain, Drogba is very clear that his motherland is in the civil war caused by the mutiny at this time. Therefore, he specially invited the camera reporter of the Ivorian national TV station to the dressing room and suddenly fell on his knees
in the way of cross-border organization cooperation, social resources are integrated through the interaction between nodes to realize the full sharing of resources, thus forming a dynamic reconfigurable and open multilateral network, and the mutual relationship and interaction formed in this process, which makes public organizations emerge with certain characteristics of network organization system
the use of public network can rece the cost and rece the expensive rental cost of long-distance dedicated digital lines for the use of private network. The public network service provider is responsible for dealing with any problems of switching service and network, and providing better data transmission service at a lower price
extended materials
in the network of public organizations, the government department is at the center of the network, which has the public power given by law, and adjusts the quantity, category and Inter Organizational Relationship of the subject of public service supply through the differentiation of rights and specialties; Through the dynamic transmission of policy, the exchange of information, the transfer of knowledge, the flow of personnel and materials, the decentralized functional organization moles are linked together in a dynamic mode to jointly perform the public service
non profit organizations, non-governmental organizations as the coordinating role, complement the shortcomings and defects of the government and commercial organizations; Private organizations, such as enterprises, become important nodes of public organization network by establishing contractual relationship with public organizations. In the supply of public goods, three different types of organizations achieve the goal of public organization system through the dynamic transmission of energy, materials and information. At the same time, they also make the optimal allocation of social resources