Shantui acquires SHANKUANG machinery
25000 mining troops in Sichuan: a flood cost hundreds of millions, most afraid of power failure and loneliness
these computing power are scattered along the Da River, a tributary of the Minjiang River. They inlge in the night of Dalate Banner in Ordos, and sleep soundly in a small city in Yili Kazakh Autonomous Prefecture of Xinjiang
today, bitcoin's total network computing power has reached about 30 billion hash collisions per second, equivalent to about 600 tianhe-2 supercomputers, and it is still growing at a high speed. " Wu Jihan, the founder of bitcontinent, wrote in the beauty of computing power
he preached a set of infinitely beautiful "computational aesthetics", but behind the aesthetics is the cruel computational world and interests. Mining is moving towards instrialization step by step and becoming a game of capital
at this time, decentralized mining machines and pools began to appear. They called themselves revolutionaries and wanted to change the extremely monopolized bitcoin world
"cloud computing power mining" is one of them
their way of playing is to establish a number of distributed mines and provide computing power leasing services with tens of thousands of real mining machines
"the current computing power is too concentrated, and some decentralized play methods are difficult to change the current pattern and ecology." Li Ke said
but the essence of blockchain is decentralization. The miners still have the belief that eventually the mining instry will be broken by the decentralized mining pool
this may be the only belief that keeps them going
how long will it take
"5-10 years, slowly nibbling at the giant's territory." Li Ke said
but will giants wait for the revolution? Will they fight back
the battle of computing power and the spark of revolution have just been ignited
source; Sina Technology
Alibaba cloud declares that it will never provide "mining platform" and virtual currency
on January 17, according to recent media reports, Alibaba has launched the virtual currency mining platform "P2P node", pointing out that Alibaba is recruiting mining machines. In this regard, Alibaba cloud refuted the rumor late at night on January 16, saying that the business had nothing to do with "mining platform" and "virtual currency" . Alibaba cloud stressed that it will never issue any virtual currency such as bitcoin or provide any so-called "mining platform". For false reports, legal responsibility will be investigated in accordance with the law
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we have noticed that recently there are media reports that Alibaba launched P2P nodes of mining platform. After verification, the service is actually a CDN (content distribution network) service based on P2P technology of Alibaba cloud, and has nothing to do with "mining platform" and "virtual currency"
P2P (peer-to-peer network) node is a common user sharing bandwidth acceleration service in CDN instry. Users can share the idle uplink network bandwidth through personal computers, routers and other devices, and become a micro CDN distribution service node, which enables other customers to get a nearby accelerated experience when downloading, live broadcasting, games and other scenes
for the resources that users are authorized to share, Alibaba cloud CDN gives rewards in the form of points, which can be used to replace gifts in points shopping malls, without monetary function and speculation value
we once again declare that Alibaba cloud will never issue any virtual currency such as bitcoin, nor will it provide any so-called "mining platform"
we will investigate the legal responsibility for the false reports
Alibaba cloud computing Co., Ltd.
January 16, 2018
this year's retest score line is about 300. For those with relatively high enrollment ratio (and Dagong doesn't give adjustment to other majors), the re examination score is 200 points, including English listening, speaking and professional courses. Professional courses include: theoretical mechanics, structural mechanics, elastic mechanics, plastic mechanics, partial differential equations, dynamics, tensor analysis, but they all test some simple basic questions, and some are questions ring the interview. These are the main professional courses required by mechanics of large engineering. It is suggested to study them carefully
about 30-40% of them are exempt from the test
the computational mechanics and engineering mechanics of Dagong are first-class in China, so we should work hard to see you report in Dagong next year.
good luck`
I. ceramic and composite filter media technology
diatomite is the most effective medium for solid-liquid separation recognized in the world. Diatomite is densely covered with 0.0003mm (0.3 μ m) micropores. This proct uses the physical structure of diatomite and adopts the highest grade diatomite, The 0.01mm particle size of ultra-fine diatomite is extruded and sintered at high temperature to form a diatom ceramic with a thickness of about 10 mm. The ceramic with a thickness of 10 mm is equivalent to a 0.3 micron filter screen composed of 1000 layers of ultra-fine diatomite. After the 1000 layers of physical filtration, more than 99% of harmful substances and bacteria with a volume greater than 0.3 micron in the incoming water are isolated in the outer layer of the ceramic, The mineral and trace elements with volume less than 0.3 μ m are allowed to pass through the water, so as to achieve the purpose of purifying water quality. The ceramic filter core made of diatomite can be used repeatedly, without secondary pollution and large water output. The filter element needs to be replaced regularly
the composite filter material can remove the resial chlorine in water, increase the content of minerals in water, and make the water quality more concive to human health. It has been widely used in the field of water purification< Second, ceramic and nano KDF technology
the water purification technology mainly consists of ceramic filter element and nano KDF filter material (NMC) in the membrane. The effluent flow is greater than that of the water purifier with hollow fiber technology. The ceramic filter element can be repeatedly cleaned and used. After a certain service life, the filter element needs to be changed regularly. Among them, nano KDF filter material (NMC) has been widely used in the field of water purification because it has no bacteria breeding in the process of using activated carbon and KDF is easy to harden and resistance increases after long-term use
Third, powdered coconut shell activated carbon,
with special high adsorption composite materials, it is made by foreign advanced high-temperature sintering process. During the sintering process, a solid molecular sieve cage structure is formed inside the filter element, and the pore size is fine and tortuous, which greatly prolongs the contact time between water and activated carbon. Once the impurities in water are adsorbed, they will not be desorbed. This process replaces the existing spiral extrusion molding process for the proction of compressed carbon, and avoids the rection of adsorption function of activated carbon surface e to binder wrapping
the filter element integrates adsorption and interception functions. The iodine adsorption value of the selected activated carbon powder is more than or equal to 1200mg / g. e to its super large specific surface area and extremely rich nanoscale microporous structure, the imported high-quality powdered carbon not only has super adsorption capacity, but also has extremely strong instantaneous adsorption capacity compared with the granular carbon and compressed carbon filter cores commonly used in the market, For the adsorption of resial chlorine, organic matter, pesticides, heavy metals in water, the effect of taste and color removal is particularly significant, so as to thoroughly purify the water quality and improve the taste< 4. Hollow fiber technology
the water purification technology based on hollow fiber membrane can filter out most pollutants in water, and the filter element needs to be replaced regularly< 5. Activated carbon technology
the activated carbon is the main water purification material of the leading water purifier, but the pure activated carbon technology is easy to breed bacteria. Therefore, the service life of the water purifier of general brands is strictly stipulated. Once the service life is reached, all the water purifiers should be discarded or replaced with new filter elements in time.
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