Mining with FPGA card
Publish: 2021-04-16 04:45:07
1. FPGA is free, it seems that mining costs a lot of electricity, Taobao seems to sell information program before
2. The purpose of mining is to package the transaction block. If the package is successful, you will open a new package and get a 25 bitcoin reward, as well as the handling charge for the future transactions added to the package
then other miners will start to package the transaction generated by your new package until the next package comes out first
in the future, the mining capacity of bitcoin will be small or even zero. You still have transaction fees. The system will always need miners, and mining machines will still exist.
then other miners will start to package the transaction generated by your new package until the next package comes out first
in the future, the mining capacity of bitcoin will be small or even zero. You still have transaction fees. The system will always need miners, and mining machines will still exist.
3. The first is the level of FPGA. Now the mining cards of foreigners all use low-cost FPGA, such as Spartan series. If you want performance, you need to use high-performance FPGAs, such as vertex series and Stratix series. The computing density and speed are tens of times higher
the second is positioning. The advantage of FPGA is fixed-point and logic, not complex floating-point operation.
the second is positioning. The advantage of FPGA is fixed-point and logic, not complex floating-point operation.
4. Wall hanging, but if we don't go, we can grab the hard wheat and sell it.
5. Unknown_Error
6. Protodyakonov' S theory
seems to be protodyakonov; The abbreviation of s mountain rock pressure theory is
for reference only
seems to be protodyakonov; The abbreviation of s mountain rock pressure theory is
for reference only
7.
DE0 card and thdb-ada sub card, these are Youjing's board cards, there should be its own demo program and manual, the attachment gives you official information, as well as demo program, just need to change to be able to run on DE0
8. No, after hybridization, the new species in the field has reproctive isolation and cannot proce offspring. It's not a new species...
9. If you want to support the PCI interface, you need to consider the interfaces of various devices.
either FPGA or ASIC is expensive and difficult to upgrade.
FPGA is a very reasonable choice.
but not all of them, only FPGA is commonly used
either FPGA or ASIC is expensive and difficult to upgrade.
FPGA is a very reasonable choice.
but not all of them, only FPGA is commonly used
10. The calculation of surrounding rock loosening pressure includes two theories:
1. Stress transfer theory (shallow buried): rock column theory (without considering friction on both sides), stress transfer theory considering friction, namely the model shown in the figure above and Terzaghi theory. Among them, the first two are not considered C, Terzaghi theory is considered, but only the rock column above the vertical is considered, and there is no lateral
2. Natural equilibrium arch theory (deep buried): proctor's earth pressure theory
according to the theory in our textbook, f = tan φ* N=tan φ[ 0.5rH^2tan(45- φ/ 2) ]
G = R (2b1h)
q = g-2f
q = q / 2B1
in Terzaghi's theory, it is assumed that the rock mass is loose, but has a certain cohesion. This theory is applicable to the calculation of general soil pressure. Because there are always some primary and secondary structural planes in the rock mass, and e to the influence of excavation chamber construction, the surrounding rock can not be a complete and continuous whole, so it is better to use Terzaghi theory to calculate the surrounding rock pressure (loose surrounding rock pressure)
Karl Terzaghi (1883-1963), also translated as Terzaghi, is an Austrian American geographer and the founder of modern soil mechanics. Born on October 2, 1883 in Prague (then Austria). In 1904 and 1912, he received his bachelor's degree and doctor's degree from Graz University of technology
in the early days, Terzaghi was engaged in a wide range of engineering geology and geotechnical engineering practice, and was exposed to a large number of soil mechanics problems. Later, he transferred to the teaching post, engaged in the teaching and research of soil mechanics, and started to establish modern soil mechanics. He has taught at MIT, HVI and Imperial College London. Finally, he taught at Harvard University for a long time
Terzaghi was successively elected as the chairman of the 1st International Conference on soil mechanics and foundation engineering from 1936 to the 4th International Conference on soil mechanics and foundation engineering from 1957. In 1923, Terzaghi published the theory of seepage consolidation, which was the first time to study the consolidation process of soil scientifically. At the same time, he put forward a basic principle of soil mechanics, that is, the principle of effective stress. In 1925, he published the world's first local mechanical monograph soil mechanics based on soil physics, which is recognized as a sign of entering the era of modern soil mechanics. Later published "theoretical soil mechanics" and "practical soil mechanics" comprehensively summarized and developed the principle and application experience of soil mechanics, which is still an important reference in engineering
Terzaghi integrates teaching, research and practice, and attaches great importance to the significance of engineering practice to the development of soil mechanics. Earth rock dam engineering is one of his important research fields. Many of his nearly 300 works are related to water conservancy projects. His last article introces the treatment of the soft soil foundation of the misson dam
e to his outstanding academic and engineering achievements, he has received 9 honorary doctorates and various awards. He is the only outstanding scholar who has won the Norman award, the highest award of American Society of civil engineers, four times. In recognition of his merits, the American Society of civil engineers also established the Terzaghi award and lecture.
1. Stress transfer theory (shallow buried): rock column theory (without considering friction on both sides), stress transfer theory considering friction, namely the model shown in the figure above and Terzaghi theory. Among them, the first two are not considered C, Terzaghi theory is considered, but only the rock column above the vertical is considered, and there is no lateral
2. Natural equilibrium arch theory (deep buried): proctor's earth pressure theory
according to the theory in our textbook, f = tan φ* N=tan φ[ 0.5rH^2tan(45- φ/ 2) ]
G = R (2b1h)
q = g-2f
q = q / 2B1
in Terzaghi's theory, it is assumed that the rock mass is loose, but has a certain cohesion. This theory is applicable to the calculation of general soil pressure. Because there are always some primary and secondary structural planes in the rock mass, and e to the influence of excavation chamber construction, the surrounding rock can not be a complete and continuous whole, so it is better to use Terzaghi theory to calculate the surrounding rock pressure (loose surrounding rock pressure)
Karl Terzaghi (1883-1963), also translated as Terzaghi, is an Austrian American geographer and the founder of modern soil mechanics. Born on October 2, 1883 in Prague (then Austria). In 1904 and 1912, he received his bachelor's degree and doctor's degree from Graz University of technology
in the early days, Terzaghi was engaged in a wide range of engineering geology and geotechnical engineering practice, and was exposed to a large number of soil mechanics problems. Later, he transferred to the teaching post, engaged in the teaching and research of soil mechanics, and started to establish modern soil mechanics. He has taught at MIT, HVI and Imperial College London. Finally, he taught at Harvard University for a long time
Terzaghi was successively elected as the chairman of the 1st International Conference on soil mechanics and foundation engineering from 1936 to the 4th International Conference on soil mechanics and foundation engineering from 1957. In 1923, Terzaghi published the theory of seepage consolidation, which was the first time to study the consolidation process of soil scientifically. At the same time, he put forward a basic principle of soil mechanics, that is, the principle of effective stress. In 1925, he published the world's first local mechanical monograph soil mechanics based on soil physics, which is recognized as a sign of entering the era of modern soil mechanics. Later published "theoretical soil mechanics" and "practical soil mechanics" comprehensively summarized and developed the principle and application experience of soil mechanics, which is still an important reference in engineering
Terzaghi integrates teaching, research and practice, and attaches great importance to the significance of engineering practice to the development of soil mechanics. Earth rock dam engineering is one of his important research fields. Many of his nearly 300 works are related to water conservancy projects. His last article introces the treatment of the soft soil foundation of the misson dam
e to his outstanding academic and engineering achievements, he has received 9 honorary doctorates and various awards. He is the only outstanding scholar who has won the Norman award, the highest award of American Society of civil engineers, four times. In recognition of his merits, the American Society of civil engineers also established the Terzaghi award and lecture.
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