What does it mean that the Internet bar is mined
mining: that is, bitcoin mining, is a process of using computer hardware to calculate the location of bitcoin and obtain it
ancient mining can be traced back to the selection of stone materials in the stone age. Later, with the rise of the metallurgical instry, mining, mineral processing technology has graally developed. This paper introces the ancient Chinese open-pit mining, underground mining, roadway support, rock fragmentation, roadway ventilation, lighting, drainage, transportation, mineral processing and other aspects< There are many surface outcrops, slope deposits or resial deposits in open-pit mining of various metal veins or orebodies, so open-pit mining has become an important mining method in ancient times. Open pit mining can be divided into excavation method and reclamation method
2. Mining is the synonym of accumulated income for activities in bitcoin
mining is brought out by the recent popularity of bitcoin. As a virtual currency, bitcoin can be exchanged for real currency. One of the ways to get bitcoin on the Internet is to participate in related activities every day. These activities, like mining in online games, need to slowly accumulate wealth in exchange for bitcoin.
is digging for bitcoin& ldquo; Mining & quot; This word is the synonym of bitcoin, and bitcoin is network currency, the total amount is fixed. Generally speaking, every once in a while, bitcoin system will generate a random code, we can use the computer to find this code, once we find this code, it will generate a block, this block is a bitcoin 1. Why do many people choose mining? because the price of bitcoin is very expensive. According to the data on February 21, 2021, the price of a bitcoin has risen to 50000 US dollars, that is 300000 RMB in fact, mining does not need too much cost. Generally speaking, the three main costs are network cost, electricity cost and computer cost. Compared with the possible 300000 yuan, the cost is not much moreover, mining is still a long-term behavior, that is, the cost of computer can be converted into the mining time of each day, so the cost will be much lower, so many people choose to mine, mainly because it is too profitable
. The bitcoin system ensures that bitcoin will not be g out too quickly by adjusting the difficulty coefficient. Every 10 minutes, the whole network is absent from work to jointly calculate a difficult problem, compete for bookkeeping rights and bitcoin rewards. If the computing power of the whole network continues to grow, bitcoin will be g out soon. In order to ensure that bitcoin can be g out in about 10 minutes, Nakamoto designs the difficulty of mining for bitcoin, Every 2016 blocks (about 2 weeks) are dynamically adjusted, so that the difficulty after adjustment makes the expected time for each block to be generated 10 minutes. Now the difficulty coefficient is about 480ph / S (Note: September 2017), which is about 68 billion times that of Genesis block. In other words, with the current computing power, the miners in the whole network need to go through about 300 trillion hash operations to find a qualified answer, Generate a new block
. Compared with point-to-point trading, mining and other purchases on the trading platform are the most popular ways to obtain blockchain assets, that is, floor trading. Floor trading of blockchain assets is similar to stock trading. The platform can help you match up, and you don't need to know who your trading partner is. Your trading partner may be one person or many people, Whether it's buying or selling, the trading platform will record the hanging order price of everyone. The buyer and the seller can obtain the latest transaction price through the real-time order. At the same time, the trading platform will summarize the historical transaction price and volume into a K-line chart, which is convenient for investors to analyze the market trend. For example, the UTOR market is the mainstream trading platform in the world.
Computer Mining: when users "mine" bitcoin, they need to use the computer to search for 64 bit numbers, and then compete with other gold miners by repeatedly solving puzzles to provide the required numbers for the bitcoin network. If the user's computer successfully creates a set of numbers, then they will get 25 bitcoins. In short, it's about looking for bitcoin
e to the decentralized programming adopted by the bitcoin system, only 25 bitcoins can be obtained every 10 minutes, and by 2140, the maximum number of bitcoins in circulation will reach 21 million. In other words, bitcoin system is able to achieve self-sufficiency, resist inflation through coding, and prevent others from destroying these codes
extended data:
the corresponding laws and regulations of computer mining in China:
in China, the regulations on the administration of RMB prohibit the proction and sale of token tickets. Because there is no clear judicial interpretation of the definition of token ticket, if bitcoin is included in the "token ticket", the legal prospect of bitcoin in China will face uncertainty
the notice of the Ministry of culture and the Ministry of Commerce on strengthening the management of virtual currency of online games (Wen Shi Fa [2009] No. 20) on June 4, 2009 stated that the application scope of virtual currency of online games was defined for the first time, and the distinction between the current virtual currency of online games and the virtual props in the game was made; At the same time, the notice said that the "notice" stipulates that enterprises engaged in related services must be approved before they can operate
in China, some Taobao stores also began to accept the use of bitcoin, and the number of businesses will graally increase
in October 2013, the first bitcoin quarterly, one bit, was released
on October 15, 2013, the network accelerator service of the network announced its support for bitcoin
on October 26, 2013, btcmini reported that GBL was hacked
on October 31, 2013, Lei Teng, a famous Internet lawyer, proposed the event of "filing a case to investigate the closure of GBL bitcoin trading platform as soon as possible", analyzed the "value function" and "use function" of bitcoin, and bitcoin should be governed by relevant laws
take chestnuts as an example. Lilac browser is now in the early stage of promotion. You can get a lot of bitcoin dividends every day by using this browser, realizing mining in your spare time.
Before we learned a simple price situation of enamel steel plate, this time, Xiaobian will take you to have a more in-depth understanding of the proction process of enamel steel plate. We mentioned that enamel steel plate is a kind of composite material, so the proction process is relatively more complex, but its material performance is good, and its appearance is also good-looking, which can be used in many different places. Then come to understand the proction process of this enamel steel plate
I. conditions of enamel steel plate
1. The carbon content is 0.08 ~ 0.12%
2. The surface structure is uniform
3. It is suitable for stretch forming, not easy to crack and wrinkle
4. It is suitable for welding, easy to clean
5. It is not easy to deform and bend ring firing. At present, the commonly used plates and models in China are Baosteel btc1, Maanshan spcc-1dc01, etc
Second, the glaze should have a wide range of firing temperature and resistance to firing, and the coefficient of thermal expansion is appropriate, After firing, it is not easy to proce cracks and deformation5. It has certain explosion-proof performance
the grinding additive and function of glaze formula
1, clay 2, quartz 3, electrolyte (nitrous borax)
the function of clay:
1 as the suspending agent of glaze, plays a suspending role
2, Clay can affect the physical structure and expansion coefficient of enamel ring sintering. Clay can change the covering power, whiteness and luster of enamel. Electrolyte: nitrite: antirust effect. Generally, 0.2-0.5% borax is used as melting aid. The standard thickness of steel plate enamel is 80-120um, The primary glaze is 120 ~ 150um
surface glaze: the surface glaze is divided into base glaze and titanium glaze
the base glaze is mainly used for color matching, the base glaze needs to have good luster and porcelain surface, glue resistance, and it is not easy to proce glue film after Decal
the white glaze needs to have good hiding power and luster, Acid resistance
the thickness of surface glaze is generally 150 ~ 200um
test index and method of glaze slurry:
1 particle size (coarse and fine) 2 specific gravity (solution weight) 3 retention (adhesion)
glaze slurry particle size test
take 50ml glaze slurry and wash it with 200 mesh screen water, After the resial porcelain powder is dried, the following results can be obtained:
standard particle size: down lead: 6-8g surface glaze: 3-5g colored glaze: 2-4G
specific gravity:
take 100ml glaze slurry into a Pycnometer (set bottle weight 50g), The total weight minus the bottle weight can be obtained as follows:
specific gravity requirements: pot cover: down lead 169-170g / 100ml surface glaze: 172-174g / 100ml colored glaze: 172-174g / 100ml
pot body: down lead 166-167g / 100ml surface glaze: 167-169g / 100ml colored glaze: 167-169g / 100ml
adhesion test:
take the plate thickness of 1mm, length and width of 100cm × 10cm stainless steel sheet (set weight as 50g) is placed in the glaze slurry after mixing, and the glaze slurry does not continue to drop until it is lifted vertically (not fast or slow). After weighing and recing the weight of stainless steel sheet, the adhesion amount is
pot cover: downward: 12g / 10 × 10cm white glaze: 14g / 10 × 10cm color glaze: 14g / 10 × 10cm
pot body downward: 7g / 10 × 10cm white glaze: 9g / 10 × 10cm color glaze: 9g / 10 × 10cm
aging of glaze slurry:
the glaze slurry needs to be aged for 36-48 hours before use, which is very important. It can improve the working properties and operating performance of glaze slurry, but if the aging time is prolonged, it will be harmful to the properties of glaze slurry, The surface glaze is generally added (potassium carbonate + magnesium sulfate). Before use, take a small amount of glaze slurry and adjust the thickness. Add the thickness adjusted glaze slurry into the glaze slurry to be adjusted, so as to avoid small bubbles and affect the performance of glaze slurry
In order to improve the unevenness of enameling powder, it is better to adopt natural dripping operation, so as to achieve uniform thickness, rationalization of action, standardization of operation, and save physical strength, so as to rece the defect rate, improve proct quality, rece the amount of glaze slurry, and save cost, Generally follow the principle that the proportion of large procts is slightly lower, the proportion of small procts is slightly higher, and the cover is slightly higher than the pot body2 gesture should be consistent as far as possible, the bottom should be swung 4-5 times, and the two sides should be swung about 2 times, and the force should be subject to the swing of the penlum.
3 when soaking the pot body, it should be 360 degrees to the edge of the pot, not to the bottom, so as to avoid the horizontal bar or too thick bottom, The manufacturing process of enamel steel plate is relatively complex, so we pay attention to the accuracy of hand gestures in the process of firing and enamelling. The accuracy of hand gestures can save the beauty of the finished proct and the amount of raw materials. In addition, in the manufacturing process of enamel steel plate will encounter some more difficult to solve problems, these problems depend on everyone's experience in the actual operation to improve his practice