Parallel mining machine
Publish: 2021-05-06 10:39:09
1. Today's bitcoin mining uses amd graphics cards, which are not very different from ordinary graphics cards. You can also play 3D games on them for design. The most popular one is the hd7850 1g version, which can well balance the mining speed and price
in other words, there are a lot of "mining machine graphics cards" on Taobao, because these graphics cards use less materials under the same core and basically unchanged hash speed, such as recing video memory to improve the performance price ratio (the size of video memory has little to do with the mining speed), which can shorten the time to recover the cost
in short, the graphics card of mining machine is the core of common high-end graphics card + the workmanship of low-end graphics card, or some cheap medium and high-end public graphics card.
in other words, there are a lot of "mining machine graphics cards" on Taobao, because these graphics cards use less materials under the same core and basically unchanged hash speed, such as recing video memory to improve the performance price ratio (the size of video memory has little to do with the mining speed), which can shorten the time to recover the cost
in short, the graphics card of mining machine is the core of common high-end graphics card + the workmanship of low-end graphics card, or some cheap medium and high-end public graphics card.
2. A device that digs bitcoin or Leyte or other electronic money. Usually a computer motherboard has more than one high-performance graphics card.
3. Just insert it according to the color of the thread
4. The "mining" of bitcoin has entered the middle and late stage, the mining speed has slowed down, and the number of miners has increased
lightcoin is not worth money now, and mining has just begun
by the way, now bitcoin mining has to design its own chip and matching chip algorithm
or directly design the chip matching bitcoin algorithm, Only by assembling "RISC parallel computing array" can we make money
the mining machines sold on Taobao can only dig a few talents a day, and even the electricity bill can't cover it
so don't think about it. If you have the courage, go in and buy two, or forget about it
lightcoin is not worth money now, and mining has just begun
by the way, now bitcoin mining has to design its own chip and matching chip algorithm
or directly design the chip matching bitcoin algorithm, Only by assembling "RISC parallel computing array" can we make money
the mining machines sold on Taobao can only dig a few talents a day, and even the electricity bill can't cover it
so don't think about it. If you have the courage, go in and buy two, or forget about it
5. Provided by upstream information technology (Shanghai) Co., Ltd., Hangzhou Yinhun Technology Development Co., Ltd. The world's first geocentric exploration "sandbox" game
Mining
Mining times: recover a little every two minutes. Every time you dig a grid, you will spend a mining time
reset the mining area back to the original state: the manual refresh device of the mining area is updated every two days
it only takes a few seconds to dig the soil, and it takes a little time to dig. It takes a lot of time, ranging from 20 minutes to 2 hours, to dig all kinds of gems, diamonds and Titans
the detonator can clear the time immediately, but the bigger the detonator is, 5-6 pieces of different kinds of ores can be obtained with each broken purple gold rock
hoe level: will be improved with the map opening event
ore type: ordinary ore (copper, tin, iron, silver, gold), various gems, diamonds, troll statues, and various soul crystals
ore usage: it can be used to forge equipment and open backpacks
detonator: clear the mining time immediately It's mainly used to dig zijinyan. There's no way to dig zijinyan. It can only be blasted with detonators.)
Mining
Mining times: recover a little every two minutes. Every time you dig a grid, you will spend a mining time
reset the mining area back to the original state: the manual refresh device of the mining area is updated every two days
it only takes a few seconds to dig the soil, and it takes a little time to dig. It takes a lot of time, ranging from 20 minutes to 2 hours, to dig all kinds of gems, diamonds and Titans
the detonator can clear the time immediately, but the bigger the detonator is, 5-6 pieces of different kinds of ores can be obtained with each broken purple gold rock
hoe level: will be improved with the map opening event
ore type: ordinary ore (copper, tin, iron, silver, gold), various gems, diamonds, troll statues, and various soul crystals
ore usage: it can be used to forge equipment and open backpacks
detonator: clear the mining time immediately It's mainly used to dig zijinyan. There's no way to dig zijinyan. It can only be blasted with detonators.)
6. How to divide the miner? You should look for professional information or professionals.
7. The major of control theory and control engineering belongs to the school of machinery, storage and transportation of University of petroleum< Control science and Engineering: (first class discipline enrollment, annual enrollment of about 40 people) automation specialty of our university was founded in 1959, which is one of the earliest universities in China to create automation specialty. In 1986, he was authorized to confer the master's degree in automation (now control theory and Control Engineering), in 2003, he was authorized to set up the doctoral degree program of "chemical equipment and process control", in 2006, he was authorized to confer the doctor's degree in "control theory and control engineering" and the master's degree in "control science and Engineering". This subject has been engaged in scientific research and Engineering Application Research of proction process modeling and simulation, advanced control and optimization, computer measurement and control technology, power system automation, and has done a lot of pioneering work in petrochemical advanced control and real-time optimization. The research results have been applied in several sets of catalytic cracking, atmospheric and vacuum distillation and ethylene plants in China, and good social and economic benefits have been achieved. Over the past 10 years, it has won many national, provincial and ministerial awards for scientific and technological progress: 1 second prize of national scientific and technological progress, 1 third prize of national scientific and technological progress, 3 first prizes of Sinopec scientific and technological progress, 2 second prizes and 3 third prizes, 1 first prize of technological invention of science and technology award of China Petroleum and Chemical Instry Association, 15 national invention patents, and more than 200 academic research papers, More than 150 master's and doctoral students have been trained
2. This major has a wide range of employment, which is needed in the upstream, middle and downstream of oil. For example, upstream petroleum machinery, exploration equipment, midstream oil proction, gathering and transportation equipment, and downstream refining and chemical equipment all need talents in this field. In previous years, the employment of this major is in the middle of the school, so we can try to study it
3. If you go upstream, go to the site, that is, the well site; Middle reaches to gathering station, oil proction brigade; Downstream to the refinery. Of course, if you can go to the Research Institute, it will be more stable. Where the treatment varies greatly, scientific research is greater than proction; International is bigger than domestic; The central government is larger than the local government
attached: examination outline of control engineering foundation
Course Name: Control Engineering Foundation
applicable major: mechanical and electronic engineering
Bibliography: Control Engineering Foundation Higher Ecation Press, Wang Jiwei
system analysis and control, sun Zengqi, Tsinghua University Press, 1994
examination content requirements
Chapter 1 Introction
master the basic composition of automatic control system, feedback control principle and basic requirements of control system<
basic concept of control system, structure and classification of control system, composition of feedback control system
Chapter 2 mathematical model
be familiar with the establishment of differential equation of electromechanical system, master the concept, modeling method and transformation of mathematical model of control system, and learn the method of block diagram and its equivalent transformation
write motion equation, Laplace transform and inverse transform, Laplace transform to solve differential equation, transfer function, structure diagram representation and equivalent transformation, simplification, impulse response and step response, simple mechanical, circuit and electromechanical system modeling<
Chapter 3 time domain analysis method
be familiar with the dynamic response of typical links, and master the time domain analysis of system stability, system steady-state and dynamic performance index
time response solution, stability criterion, parameter stability region, steady-state performance analysis and static error, dynamic performance index and second-order single output system analysis<
Chapter 4 frequency domain analysis method
master the basic concept of system frequency domain characteristics, skillfully draw the Nissl diagram and Bode diagram of the system, master the frequency domain analysis method, and analyze the system characteristics according to the open-loop performance
frequency characteristic function, image of frequency characteristic function, frequency characteristic diagram of basic unit, Bode diagram of complex frequency characteristic, relationship between closed-loop frequency and open-loop frequency characteristic function, Nyquist stability criterion, stability margin of control system, relationship and analysis of control system performance index, and dynamic performance analysis of closed-loop system based on open-loop frequency characteristic< Chapter 5 control system design and calibration
PID control law, frequency series correction and design, master the principle and concept of parallel correction and compound correction< Chapter 6. Sampled data control system
composition of sampled data control system, sampler and holder, difference equation and Z-transform, discrete transfer function, stability of sampled data system. Discrete PID controller and algorithm implementation.
2. This major has a wide range of employment, which is needed in the upstream, middle and downstream of oil. For example, upstream petroleum machinery, exploration equipment, midstream oil proction, gathering and transportation equipment, and downstream refining and chemical equipment all need talents in this field. In previous years, the employment of this major is in the middle of the school, so we can try to study it
3. If you go upstream, go to the site, that is, the well site; Middle reaches to gathering station, oil proction brigade; Downstream to the refinery. Of course, if you can go to the Research Institute, it will be more stable. Where the treatment varies greatly, scientific research is greater than proction; International is bigger than domestic; The central government is larger than the local government
attached: examination outline of control engineering foundation
Course Name: Control Engineering Foundation
applicable major: mechanical and electronic engineering
Bibliography: Control Engineering Foundation Higher Ecation Press, Wang Jiwei
system analysis and control, sun Zengqi, Tsinghua University Press, 1994
examination content requirements
Chapter 1 Introction
master the basic composition of automatic control system, feedback control principle and basic requirements of control system<
basic concept of control system, structure and classification of control system, composition of feedback control system
Chapter 2 mathematical model
be familiar with the establishment of differential equation of electromechanical system, master the concept, modeling method and transformation of mathematical model of control system, and learn the method of block diagram and its equivalent transformation
write motion equation, Laplace transform and inverse transform, Laplace transform to solve differential equation, transfer function, structure diagram representation and equivalent transformation, simplification, impulse response and step response, simple mechanical, circuit and electromechanical system modeling<
Chapter 3 time domain analysis method
be familiar with the dynamic response of typical links, and master the time domain analysis of system stability, system steady-state and dynamic performance index
time response solution, stability criterion, parameter stability region, steady-state performance analysis and static error, dynamic performance index and second-order single output system analysis<
Chapter 4 frequency domain analysis method
master the basic concept of system frequency domain characteristics, skillfully draw the Nissl diagram and Bode diagram of the system, master the frequency domain analysis method, and analyze the system characteristics according to the open-loop performance
frequency characteristic function, image of frequency characteristic function, frequency characteristic diagram of basic unit, Bode diagram of complex frequency characteristic, relationship between closed-loop frequency and open-loop frequency characteristic function, Nyquist stability criterion, stability margin of control system, relationship and analysis of control system performance index, and dynamic performance analysis of closed-loop system based on open-loop frequency characteristic< Chapter 5 control system design and calibration
PID control law, frequency series correction and design, master the principle and concept of parallel correction and compound correction< Chapter 6. Sampled data control system
composition of sampled data control system, sampler and holder, difference equation and Z-transform, discrete transfer function, stability of sampled data system. Discrete PID controller and algorithm implementation.
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