F 讠 l ore pool
Mine pool refers to:
as the computing level of the whole bitcoin network continues to rise exponentially, a single device or a small amount of computing power can not get the block reward provided by the bitcoin network on the bitcoin network
after the computing power of the whole network has been improved to a certain extent, the low probability of getting rewards has prompted some geeks on "bitcoin talk" to develop a method that can combine a small amount of computing power and operate jointly, and the website established in this way is called "mine pool"
extended data:
the existence of the mine pool reces the difficulty of bitcoin and other virtual digital currency mining, reces the mining threshold, and truly realizes the bitcoin mining concept that everyone can participate in
but its disadvantages are also very obvious, because computing power is connected to the mine pool. As a mine pool, it will have huge computing power resources. In the bitcoin world, computing power represents the bookkeeping right, and computing power is everything. If the computing power of a single mine pool reaches more than 50%, it will be easy to launch 51% attacks against virtual digital currencies such as bitcoin, The consequences are very terrible:
the mine pool can make the mine pool with 49% of the remaining computing power have no harvest, instantly quit the competition and go bankrupt. The mine pool's computing power exceeds 50%. If 51% attack is launched, it will easily occupy all the effective computing power of the whole network
After the computing power of the whole network has been improved to a certain extent, the probability of getting rewards is too low, so that some geeks on "bitcoin talk" can develop a method that can combine a small amount of computing power and operate jointly, and use this method to build websites
in this mechanism, no matter how much computing power an indivial miner can use, as long as he participates in mining activities by joining the mine pool, no matter whether he has successfully mined effective data blocks, he can get a small amount of bitcoin reward through his contribution to the mine pool, that is to say, many people cooperate in mining, and the bitcoin reward is shared by many people according to their contribution
as of January 2019, the top five bitcoin pools in global computing power are btc.com, pool, antpool, flush pool, and f2pool. At present, about 70% of global computing power is in the hands of Chinese miners
extended data:
handling charge:
bitcoin miners will charge a small amount of fees for most transactions, the main purpose of which is to prevent people from sending a large number of boring small transactions and wasting network resources. At present, most of the handling charges for each transaction are & T 3647; 0.0001/kb (0.0001btc / KB). In fact, after 0.9.0, the default handling charge will be reced to & 3647; 0.00001/KB(0.00001 btc/KB)
because the amount of data occupied by most transactions is less than 1 kilobyte, generally speaking, the amount of data is less than 3647; 0.00001 (0.00001 BTC / KB) is enough. At the same time, in the future, when the bitcoin block rewards are less, the service charge will become the main source of miners' income, and the service charge of bitcoin will be related to the number of bytes occupied by the transaction
at present, the calculation standard of service charge in bitcoin system is not mandatory, so users can not give any service charge when the transaction is in progress
however, most miners usually give priority to the transaction with higher handling charges when building data blocks, so that they can get higher remuneration when mining is successful. Therefore, the transaction without any handling charges may take a long time to be processed and incorporated into the blockchain
in addition, e to the block capacity limit of 1MB and the recent increase in bitcoin transaction volume, the handling charges have increased significantly, and the waiting time for the transaction to be confirmed has also become much longer
the mining pool is the necessary infrastructure for the exploitation of P2P cryptography virtual currency such as bitcoin (digital currency). It is generally an open team mining server. Its significance is to improve the stability of bitcoin mining and stabilize the miners' salary. At present, the most powerful mining pools in the world are f2pool, antpool, BW pool, BTCC pool and bitfury. Except for bitfury, the rest are from China
with more and more people participating in mining, the computing power of bitcoin network is rising, and it is difficult for a single device or a small amount of computing power to dig bitcoin again. At this time, the mine pool was born
operation principle of bitcoin mine pool
the ore pool is responsible for information packaging, and the access mine is responsible for competing for bookkeeping rights
e to the collection of the computing power of many miners, the computing power of the mine pool accounts for a large proportion, and the probability of digging bitcoin is higher
for example
suppose 1 million people participate in bitcoin mining, and the whole network has 400p computing power, of which 90% of the miners have less than 1p (1000t) computing power. If a 1t miner is put into operation, it will account for 1.400000 of the whole network's computing power. Theoretically, every 400000 10 minutes can dig a block, that is, only 7.6 years can dig a block, and then get 50 bitcoins at a time
then, if I find another 9 miners with 1t dynamometer and reach an agreement, we will have a total of 10 people, and any one of them will be divided equally according to the proportion of each person's computing power, then we are a whole. With a total of 10t computing power, we can dig a block in 0.76 years on average, Then we have five bitcoins mined in 0.76 years. What if we organize 100 people, 1000 people, 10000 people or even 100000 people
if it is 100000 people, I can dig one block in 100 minutes on average. As a member of the team, my income will tend to be stable
this is the basic principle of the mine pool, that is, everyone forms a team to mine bitcoin, you can refer to the "buy together" in the lottery
of course, the above is only a simple description of the basic principles and properties of the ore pool, and the actual situation will be very complicated
the ore pool is a fully automatic mining platform, that is, the ore machine is connected to the ore pool to provide computing power and obtain profits
the bitcoin reward generated by mining in the mine pool will be distributed according to the proportion of each miner's contribution to computing power
compared with single mining, adding to the ore pool can obtain more stable income
I hope this answer will help youA.f.f.l in the construction drawing means above the finished surface of the ground
the components of architectural construction drawings:
generally include the following parts:
node details and door and window details, Detailed drawing of stairs (depending on the function, there may be multiple stairs and elevators)
as a structural designer, he must carefully and rigorously arrange the architectural drawings. If he doesn't understand, he needs to consult the architecture and other professions involved in the architectural drawings. He should absolutely understand the architectural design concept and intention
extended data:
Construction Drawing Review
construction drawing review refers to the review of construction drawing related to public interest, public safety and mandatory standards of engineering construction by construction drawing review organization (hereinafter referred to as review organization) recognized by construction competent department in accordance with relevant laws and regulations. The construction drawings shall not be used without passing the examination
significance of existence
in order to strengthen the management of the examination of construction drawing design documents of housing construction engineering and municipal infrastructure engineering, the measures are formulated in accordance with the regulations on the quality management of construction engineering and the regulations on the management of survey and design of construction engineering
work content
the data submitted by the construction unit for technical review of construction drawings should include the following main contents:
1. Approval documents and attachments of relevant government departments as the basis of design
2. Qualified geotechnical engineering investigation documents (detailed investigation)
3. Complete set of construction drawings (including calculation sheet and indicating the name and version of calculation software)
4. Other information needed for examination
the technical review of construction drawings should include the following main contents
1. Whether it meets the mandatory provisions of engineering construction standards and other relevant mandatory standards for engineering construction
Whether the foundation and structure design are safe or not Whether it is in the public interest4. Whether the construction drawings meet the design depth requirements
5. Whether it meets the requirements of the approval documents of the relevant government departments as the design basis
the improvement of the level of interior construction drawing and ability training
Interior design is a multi instry and multi professional interdisciplinary subject, which is not only to beautify the environment, but also to improve the quality of people's life. Today, with the rapid development of economy and the increase of investment in fixed assets, interior designers have a broader stage to reflect their self-worth. The increasingly fierce market competition leads to frequent updating of construction technology
the improvement of the quality of the owners has put forward higher requirements for the designers. As an emerging discipline, the Ministry of construction of interior design professional technical specifications, instry standards are not perfect, each company has its own way of expression. In reality, low design cost and short design cycle are common problems in domestic design instry
However, e to the uneven quality of home decoration designers, the idea of paying more attention to effect drawing than construction drawing e to competition, and the imperfection and neglect of proofreading, auditing and approval process have a great impact on the quality of drawings. In the long run, there will be a vicious circle, which is not concive to the development of the instryfacing the vast number of customers (owners), the communication of decoration enterprises is first reflected in the effect of the design scheme, and the advantages and disadvantages of communication also reflect the strength of an enterprise in the design. As the guidance and basis of decoration construction, construction drawing must be accurate. As a designer, the first task is to constantly improve their understanding level and establish the prestige of design
in order to better convert the design scheme into the construction drawing, the designer must consider which material is more economical and which technology is more concive to the construction, grasp various scales to meet the requirements of customers, achieve higher artistic effect with lower engineering cost, and meet the intention of the scheme design
you throw yourself into the suspicious
I want to cross the vast universe,
put on silver clothes to the vast prison,
a few lines, put "since Caesar's imitator, disaster people's
thought that ink mark is shallow Acacia, ha ha
full, full
file
-- fine; Sharp; 5; Angle; Field;