Force, power, calculation
recently, bitcoin's network computing power has entered the era of P computing power (1P = 1024t, 1t = 1024g, 1g = 1024m, 1m = 1024k). In the soaring computing power environment, the arrival of P era means that bitcoin has entered a new stage of arms race. This is the meaning of computing power. I would like to know more about it Please accept)
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What does 1p mean
first of all, 1p computing power is equivalent to about 1.05 million g, which means that if you have 1g computing power of the whole network, you can get almost 1.05 million of bitcoin output of the whole network. According to the output of 3800 bitcoins per day, we can see that the daily income of 1g of computing power has dropped to 0.0036 bitcoins, which is about 2.7 yuan according to the current market price. If the electricity cost and mining machinery hardware cost are included, the profit is almost gone
secondly, 1p's whole network computing power seems amazing, but in fact, in a year's time, you will think it's just a pediatrics, because cointera will launch 2p miner in December, and bitmine will launch 4P miner in March next year. If these companies are not put in biochemical weapons by Syria, it should be expected that bitcoin's whole network computing power will reach more than 10p in a year's time, By then, 1g of computing power will only be able to dig 0.00036 bitcoins a day.
computing power refers to computing power, refers to that in the process of getting bitcoin through "mining", we need to find its corresponding solution M. for any 64 bit hash value, there is no fixed algorithm to find its solution M. we can only rely on computer random hash collisions. How many hash collisions can a mining machine do per second, is the representative of its "computing power". The unit is written as hash / s, which is the so-called proof of work mechanism (POW)
Yunzun group is a pyramid scheme
in 2016, the Bureau of instry, commerce and quality supervision of wusheng County investigated and dealt with the case of Chen engaging in pyramid selling activities through yunzun group
according to the sales performance of off-line staff, Chen obtained corresponding e-money and cash rewards from yunxun company and yunzun group. Chen's behavior has constituted the pyramid selling behavior referred to in Article 7 of the regulations on the prohibition of pyramid selling, and the Bureau of instry, commerce and quality supervision of wusheng County is currently investigating and handling it
According to Article 7 of the regulations of the people's Republic of China on the prohibition of pyramid selling, pyramid selling should meet the following three requirements:1; Capitation fee; Or & quot; Qualification fee & quot; Or pay in disguised form by subscribing for goods (including services) & quot; Capitation fee; Or & quot; Qualification fee & quot; Obtain the qualification to join or introce others to join
2. By introcing others to participate in the development of offline personnel, an organizational system with internal wealth redistribution relationship between the upper and lower levels is established
3. The organizer uses part of the expenses paid by the participants to pay the first participants to maintain the operation; The benefits of participants are determined by their joining order and the number of development personnel
extended data:
in 2016, Mr. Chen of wusheng County, introced by Mr. Jiang, a member of yunxun and Mr. Liu, a member of yunzun alliance, paid a certain fee and registered as a member of yunxun and yunzun Alliance on yunxun's member disk and yunzun alliance platform
then, Chen called some middle-aged and elderly people to publicize the profit model and bonus system of yunxun and yunzun alliance in the form of family gathering, flyer printing, wechat, etc., and took advantage of this to join the development staff, with each two people at a level, developing in a pyramid structure, and the development level reached 20 levels
source of reference: the official website of Guang'an municipal government - "Hongn Chunlei action 2017" typical case
compared with your electricity consumption:
resistance formula: r = ρ L / S = 0.017x100 / 35 = 0.4 Ω
when passing 5kW three-phase load, the current is about 9A
voltage loss, u loss = IR = 9x0.4 = 3.6V
power loss, P = I2R = 9x9x0.4 = 32.4w (I2 is square)
power loss in one day, w = 32.4wx24 = 778w. H = 0.778 degrees
when passing 10kW three-phase load, The current is about 18a
voltage loss u loss = IR = 18x0.4 = 7.2V
power loss P = I2R = 18x18x0.4 = 130W
power loss of one day w = 130wx24 = 3120w. H = 3.12 degrees
when passing 20kW three-phase load, The current is about 36a
voltage loss, u loss = IR = 36x0.4 = 14.4V
power loss, P = I2R = 36x36x0.4 = 518.4w
power loss in one day, w = 518.4wx24 = 12440w. H = 12.44 degrees
the above shows that the line loss increases with the increase of power consumption, and the greater the load is, the greater the loss is. The current and voltage loss increase by one time, and the power loss or energy loss increases by four times
you said that the line loss of 5000 degrees is 400 degrees and that of 10000 degrees is 800 degrees, which is correct when the load is constant, but not when the load changes. Because the current increases or decreases by one time, the power loss is approximately increased or decreased by four times
as a user, the only way to rece the power loss is to rece the length of the line and increase the cross-sectional area.
The number of cables is not the number of cable cores, which needs to be clarified
cables need not be multiplied by the number of cores, wires need to be replaced
Thevv-3 * 6 cable is a cable, so there is no need to multiply the number. RVV-2 × Although 1.5 is not a cable, there is only one wire, so there is no need to multiply the number
the concept difference between wire and cable:
wire is generally used for concting metal wire carrying current. There are solid, twisted or foil woven and other forms. According to the insulation condition, it can be divided into bare wire and insulated wire
a cable is an insulated conctor composed of one or more mutually insulated concting cores placed in a sealed sheath. A protective covering layer can be added outside for transmitting, distributing electric energy or transmitting electric signals
the difference between it and ordinary wires is that the cable size is larger and the structure is more complex. The difference between wire and cable is that the size of wire is generally small and the structure is relatively simple, but sometimes the cable is also included in the generalized wire
extended data
cables and wires can be distinguished according to common codes:
the common codes of cables are listed below for distinguishing:
purpose code - not marked as power cable, K - (control cable), P - (signal cable)
conctor material code - not copper (or Cu), L - (aluminum)
inner sheath code - Q - (lead), L - (aluminum), H - (rubber), V - (PVC sheath), inner sheath is generally not marked
outer sheath code - V - (PVC), Y - (PE power cable)
derived code - D - (no drip), P - (dry insulation)
special proct codes - th - (wet tropical), Ta - (dry tropical), Zr - (flame retardant), NH - (fire resistant), wdz - (low smoke and halogen-free, enterprise standard)
s15-m-50kva is a transformer with capacity of 50KVA and low voltage side voltage of 0.4kV. The outlet current of low voltage side is about 50 / (0.4 * sqrt (3)) = 72.17a, so the selection of transformer can be 75 / 5
hope to be useful to you ~
data corresponding to transformer model: http://www.xzhhdl.com/cpcs.asp
2. Be familiar with power engineering and know how to do it
3. Be very familiar with "quota" and understand the amount of labor, material and money corresponding to dry process
4. I really can't. I learned to use the "budget quota" software in half a day, which is very easy to use.
but this formula holds only when the reference capacity is 100mva,
if you use other reference capacities, you need to re dece the formula, including equipment parameters. Please take the common value
similarly, if you know the per unit value of system impedance, you can also use this formula to calculate the system short-circuit capacity