Figure 3 PC computer miner with triangle sharp corner coin
You can't dig in a day. It takes 2000 years
the global unified computing difficulty of bitcoin is 2621404453 (expected to change in two days). It takes more than 2000 years for a 2.5GHz CPU to work out a bitcoin
in order to make the graphics card fully loaded for a long time, the power consumption will be quite high, and the electricity bill will be higher and higher. Many professional mines at home and abroad are operated in areas with extremely low electricity charges, such as hydropower stations, while more users can only mine at home or in ordinary mines, so the electricity charges are not cheap. Even in a certain residential area in Yunnan, there was a case of crazy mining, which led to a large area trip of the residential area, and the transformer was burned
extended data:
bitcoin network generates new bitcoin through "mining". In essence, the so-called "mining" is to use computers to solve a complex mathematical problem to ensure the consistency of bitcoin network distributed accounting system
bitcoin network will automatically adjust the difficulty of mathematical problems, so that the whole network can get a qualified answer about every 10 minutes. Then bitcoin network will generate a certain amount of bitcoin as block reward to reward the person who gets the answer
when bitcoin was born in 2009, block rewards were 50 bitcoins. Ten minutes after its birth, the first 50 bitcoins were generated, and the total amount of money at this time is 50. Then bitcoin grew at a rate of about 50 every 10 minutes. When the total amount reaches 10.5 million (50% of 21 million), the block reward will be halved to 25
when the total amount reaches 15.75 million (5.25 million new output, i.e. 50% of 1050), the block reward will be further halved to 12.5. The monetary system used to have no more than 10.5 million in four years, after which the total number will be permanently limited to about 21 million
First of all, if the home computer is used to calculate bitcoin, even if the configuration is high, it will take several days to dozens of days. It may come out with a string of effective bitcoin (that is, bitcoin), and then it can be traded through the market of circulating bitcoin
special bit code operation requires a lot of graphics resources, so there are so-called mining machines, as shown in the figure below
this is a miner, which is specially used for mining. Such a miner may not be able to dig a bitcoin a day; The price of a mining machine is at least about 20000 RMB, and mining is a very power consuming project. All the graphics cards are running with full load, and the electricity charge will be very high
so don't blindly follow this kind of thing, it's not something that ordinary people can dig up with their home computers
2, planetarium to science and Technology Museum bus:
option 1: [transfer once] (click to check the picture)
first take 632 (no.5-qinghe Xiaoying Bridge West) and get on at zoo station, then get off at Mingguang bridge north station; Finally, transfer to 387 (Beijing West Station - east entrance of Huizhong Road), get on at mingguangqiao north station, and get off at China Science and Technology Museum Station; The whole journey is about 9.5 km
option 2: [transfer once] (click to look up the picture)
first take 362 (Xierqi station Ximen of urban rail) to get on at zoo station and get off at Ximen Station; Finally, transfer to 387 (Beijing West Station - east entrance of Huizhong Road), get on at Ximen South Station, and get off at China Science and Technology Museum Station; It's about 8.5km
option 3: [transfer once] (click to look up the picture)
first take 347 (Badachu Xinjiekou gap) and get on at zoo station, then get off at yutaoyuan station; Finally, transfer to 387 (Beijing West Railway Station East of Huizhong Road), get on at suojiafen station and get off at China Science and Technology Museum Station; The whole journey is about 8.1 km
option 4: [transfer once] (click to check the picture)
first take 27 (West Diaoyutai outside Andingmen) to get on at the zoo station and get off at yutaoyuan station; Finally, transfer to 387 (Beijing West Railway Station East of Huizhong Road), get on at suojiafen station and get off at China Science and Technology Museum Station; The whole journey is about 8.1 km
option 5: [transfer once] (click to check the picture)
first take 360 (Xiangshan Ximen) to get on at the zoo station and get off at Ximen Station; Finally, transfer to 387 (Beijing West Station - east entrance of Huizhong Road), get on at Ximen South Station, and get off at China Science and Technology Museum Station; The whole journey is about 8.6 km
option 6: [transfer once] (click to check the picture)
first take 634 (Xiangshan Park East Gate Ximen) to get on at the zoo station and get off at Ximen Station; Finally, transfer to 387 (Beijing West Station - east entrance of Huizhong Road), get on at Ximen South Station, and get off at China Science and Technology Museum Station; The whole journey is about 8.6 km.
The definition of acute triangle is that all three angles are less than 90 degrees. The specific drawing steps of acute triangle are as follows:
1. Draw a square as a reference and draw a straight line in the square
The middle vertical line of obtuse angle, right angle and acute angle triangle is shown in the figure below:
take the middle point of the triangle's side, and make the vertical line of that side through that middle point, that line is the middle vertical line
The inverse theorem of the vertical line: to the point where the distance between two ends of a line segment is equal, it is on the vertical bisector of the line segment It is proved that any point P, PA = Pb on the line Mn is known, and Mn is the vertical bisector of abextended data
1. How to determine the vertical line:
1. Use definition: the line passing through the midpoint of a line segment and perpendicular to the line segment is the vertical bisector of the line segment
The vertical bisector of a line segment can be regarded as a set of points with equal distance to the two ends of the line segment The middle vertical line divides a line segment into two equal lines from the middle, and is perpendicular to the line segment (90) ° Angle) Second, the nature of the vertical bisector:1
The distance from any point on the vertical bisector to the two ends of the line segment is equalvertical bisector, referred to as "vertical line", is a very important part of junior high school geometry. Definition of vertical bisector: a line passing through the middle point of a line segment and perpendicular to the middle line is called the vertical bisector of the line segment
specific steps:
make a vertical line on BC side through point a, which is the height of BC side
make a vertical line on AC side through point B, which is the height of AC side
make a vertical line on edge AB through point C, which is the height of edge ab
right angle: right angle side
obtuse angle: make a vertical line from a vertex of the triangle to its opposite side. The line segment between the perpendicular feet of the vertex is the height of the triangle, but there are two opposite sides that need to be extended
acute angle refers to greater than 0 ° And less than 90 °( An acute angle is a bad angle. The sum of two acute angles is not necessarily greater than the right angle, but must be less than the horizontal angle. The acute angle must be the first quadrant angle, and the first quadrant angle is not necessarily the acute angle
the values of trigonometric function of acute angle are all positive
when the angle is 0 °~ ninety ° The results show that the sine value increases (or decreases) with the increase (or decrease) of the angle, and the cosine value decreases (or increases) with the increase (or decrease) of the angle; The tangent value increases (or decreases) with the increase (or decrease) of the angle, and the cotangent value decreases (or increases) with the increase (or decrease) of the angle; The secant value increases (or decreases) with the increase (or decrease) of the angle, and the cosecant value decreases (or increases) with the increase (or decrease) of the angle
when the angle is 0 ° ≤A≤90 ° 0 ≤ Sina ≤ 1, 1 ≥ Cosa ≥ 0; When the angle is 0 °& lt; A0, cotA> 0
As shown in the figure, △ ABC is an isosceles right angle. B90 ° A and C45 °
Bo is perpendicular to AC and D is at any position on AO
then the triangle △ BCD is an acute triangle