Tiesuan Lijia

1. In fact, people will not let such a thing happen, because once someone controls 51% of the computing power of the whole network, the security and non tamperability of the system will be invalid, then the decentralization system of bitcoin will collapse, and the price of bitcoin will plummet or even return to zero, which is bad news for the participants of the whole network. Therefore, we will spontaneously control the distribution of computing power in the whole network, so as not to let one company dominate. Even when many people find that the computing power of a certain mine is too large, they will take the initiative to withdraw from the mine. Now the most powerful mining pool in the whole network accounts for about 25% of the whole network.

2. Computational cat is made by a company in Hangzhou. They don't have a payment license. They do it by docking with a payment company called Leshu who has a payment license from a third party. Therefore, the fund is safe and subject to the supervision of the central bank
for application, you can pay attention to their VW public computing cat. There should be a tutorial in it, and you can also consult their customer service. Someone can help you solve the problem online

3. Unreliable, unreliable, unreliable, don't lose the principal for small profits. Personal opinions are for reference only

4. It's legal and compliant. We've been using it for a long time. There's no problem at all.

5. Calculation of punching force

in blanking process, punching force refers to the general term of
, unloading force, pushing force and pushing force. Punching force is the main basis for selecting
and also the necessary data for die design<

1.
calculation

is the pressure exerted on the sheet by the punch in the blanking process, which changes with the depth of the punch into the material. The blanking force F can be calculated as follows:
F = KLT τ
where f -- blanking force, N
k -- coefficient; Considering the wear of
cutting edge, fluctuation of clearance between punch and die (variation or uneven distribution of values), lubrication, variation of
and thickness tolerance and other factors,
is generally set as 1.3
L -- total length of blanking periphery, mm
T -- material thickness, mm< br /> τ—— Material
, MPa
when
cannot be found τ It can be used
σ B substitute τ， In this case, the approximate calculation method of k = 1 is adopted. That is,
F = Lt σ B
where σ B -- material
, MPa

2. Calculation of unloading force, pushing force and pushing force
after blanking, the force required to scrape the material from the punch is called unloading force; The force required to push the part or scrap from the die is called pushing force; The force required to eject the part from the die is called ejecting force. As shown in Figure 2.7.1. In the actual proction, it is generally calculated as follows:
unloading force F = k unloading f punching
pushing force F = NK pushing f punching
pushing force F = k jacking f punching
where f punching -- blanking force, N
k unloading force coefficient, the value of which is shown in table 2-18
k push -- push force coefficient, whose value is shown in table 2-18
k-jacking force coefficient, the value of which is shown in table 2-18
n -- the quantity of parts or scrap accumulated in the die (n = H / T); H is the height of the straight edge; T is the material thickness<

see the following:
material name, grade, material state shear strength

Electrical
dt1, DT2, DT3 have been
180

D11, D12, D13, 190
d31, D32
d41 ~ d48 560
D310 ~ D340 not

ordinary

not
260 ~ 320

270 ~ 340

310 ~ 380
q225 340 ~ 420

400 ~ 500
high quality carbon

05f annealed 210 ~ 300
08F 220 ~ 310
08F 220 ~ 360
10F 220 ~ 340
15F 250 ~ 370
15F 270 ~ 380
20f 280 ~ 390 20 280-400
25 320-440
30 360-480
35 400-520
45 440-560
50 440-580
55 already
550
65 600

annealed 600

T7-T12 600
t7a-t12a 600
T13 t13a 720
T8A T9A
600-950
material name and grade material state shear strength


10mn2 already annealed 320-460
< B R / > 25crmnsia has been annealed 400-560
25crmnsi

400-600

720

640-960
65si2mnwa

annealed 320-380
2Cr13 320-400

400-480

cold rolled
460-520
2cr18ni9
800-880


softened 430-550
al 1070a (L2),
1050A (L3) annealed 80
1200 (L5) cold work hardened 100

3A21 (
) annealed 70 ~ 100
semi cold work hardened 100 ~ 140

Aluminum

(LF2) annealed 130 ~ 160
semi cold work hardened 160 ~ 200
high strength aluminum

7A04 (LC4) annealed 170
hardened and annealed 120
350


MB1 ~ 240
MB8 annealed 170 ~ 190
cold work hardened 190 ~ 200
pure aluminum T1, T2, T3 soft 160
hard 240

(
) 2A12 (
) annealed 105 ~ 150
hardened and
280 ~ 310
cold work hardened 280 ~ 320

6. Xiaopeng P7 as an intelligent sports car, it has a good home space design. The length of P7 is 4880, the wheelbase is 2998mm, and it is a standard medium and large vehicle. The exquisite design of the rear seats makes the space of a coupe more than enough. Especially for this floor, many models that are not electric platforms will have a disadvantage, that is, the rear floor has a high bulge, so the comfort of passengers in the middle of long-distance travel is relatively general. But I think the Xiaopeng P7 is the second generation of intelligent car off the SEPA electric platform. There is no such problem. It can fully ensure the comfort of the rear seat. What you can still feel in the back is the panoramic glass roof. The car with interstellar view has 375% more field of view than the ordinary skylight. It adopts Low-E glass from Saint Gon, France, also known as low radiation glass. UV transmittance. Sit in the driver's seat, which is the core experience center of Xiaopeng P7's intelligent music cockpit. The driving space of Xiaopeng P7 magnifies the intelligent experience and music experience, creating a comfortable enjoyment of the top space. It is composed of a 14.96 inch touch screen + 10.25 inch HD full LCD intelligent instrument, and P7 LCD instrument and central control large screen. It can realize the connected special-shaped fit screen, double screen interaction, information cross screen display, central control 2400 × 1200 high resolution, is the top level of mass proction vehicles. In terms of intelligence, P7's little p assistant ensures this. Connected with the can of the whole vehicle, it can not only hear, but also understand, and the key can be done. At present, it has been able to recognize more than 1000 voice commands, and is the most comprehensive intelligent voice interaction system. All these have greatly improved my love for Xiaopeng.

7. There are related formulas in the transformer manual, but it is not clear in a word or two
you can type out the parameters of the transformer for you to calculate.

8. It's OK. I've been mining on this platform for a long time, and the reputation of the platform has been very good.