How to make the sound isolating box for mining

1. This means that the pressure is too high, so I suggest you rece it.

2. The result upstairs is correct. There is no way to write the formula here. The superscript can't be typed
L = 10lg (10 ^ (L / 10) + 10 ^ (L / 10)) = 10lg (2 * 10 ^ (L / 10)) = L + 10 * LG2 = 60 + 10 * 0.301 = 63
pro, give me a good comment

3. The IDE interface can insert up to four hard disks. That is to say, two IDE cables are connected to two hard disks each. Ha ha, the price is that other IDE devices can't install anything, such as CD-ROM

to put it this way, I'll teach you: you name the IDE interface on the motherboard as 1 and 2 (for example, the blue one is 1, and the black one is 2)
first, you connect a hard disk on the data line of ide1, that is, the main disk (the hard disk with the system), then plug in the power cord and fix it in the chassis with screws (don't tell me you can't do it, so you can just find someone who knows a little bit)
Second, connect the slave disk (that is, your second hard disk) to the socket in the middle of the data line of ide2, install the jumper bar on the two pins nearest to the data line, then connect the socket at one end of the IDE data line to the optical drive, install the jumper bar on the two pins in the middle (the optical drive usually has only three sets of jumpers), connect the power cord and fix the screw

after power on, enter the BIOS, enter the first item, and see if your two hard disks and optical drives are detected. If so, restart the computer - OK, if not, find a knowledgeable friend

I encountered a bad situation: Shenzhou brand computer, add a CD-ROM drive into a al CD-ROM drive. After installation, it can be detected in the BIOS, and it disappears after entering windows. It tired me for two hours - originally that person worshipped me very much, but later I saw from his eyes that he took me as a club, sweat! Finally found that windows ide channel to disable, NND!

4. The best is brand power. High power. The main disk is the system disk to be installed to the first interface
nothing else.

5. Yes, no problem. The mechanical hard disk is the same as SATA2 and 3, no difference. Solid state hard disk is different, with sata3 performance than 2-pass read and write speed is much faster.

6. Hello, yes. Bring two ID cards or temporary ID cards (temporary residence permits to be submitted to the applicant for application not registered in your registered residence) and photos of the certificates. The application forms for the driving license and the statement of loss of driving certificate issued by the vehicle administration office after the issuance of the driving license are completed and submitted to the supplementary certification service. After paying the cost of 10 yuan, please wait for your new driver's license&# 160;

7. Generally, two people who don't buy a hard disk will take it with them

8. I suggest that the speed of the array will be much faster if you buy it, but if you don't, you should buy a
1TB black disk
the black disk has the best performance of SATA
the blue disk is medium
the green disk is the worst

9. How to use brin line channel line? In many cases, the success rate of using brin line index for trading is far better than KDJ, RSI and even moving average. Skillful use of brin line trading will make it possible for us to avoid the trap of using some common technical indicators to lure more or less, because it is almost impossible for a banker to do business on brin channel line

the general application rule of brin line is that when the stock price breaks down the support line, the buying point appears, while the selling point breaks up the resistance line. The average is an important support or resistance to test whether a trend can continue. This law has a good indication in the consolidation or upward trend, but in a downward trend, the breakdown of the lower support line is not a real buying point

first, in the normal range, the technology and method used by brin line is

1. When the stock price crosses the upper limit pressure line, the selling point signal will be displayed

2, when the stock price crosses the lower limit support line, buy the signal

3, when the stock price crosses the middle limit from bottom to top, it is a plus signal< In a strong market, the stock price rises continuously, usually between bolb1 and bolb2. When the stock price rises continuously for a long time, the stock price goes up through bolb1, and then down through bolb1 the next day, and further breaks bolb2, driving the bolb1 curve, There is an obvious turning point from rising to flat, which is a sell signal.

3. In weak market, we should pay attention to the following points:

1. We should not use the stock price crossing the support line as a buy signal, but use the link of the lowest price of a stock crossing the brin band as a signal to pay attention to the stock initially

2. After the primary election signal appears, the general stock price will pull back. If the stock price does not pull back effectively, it will break down the track, and Brin will turn up with the support line. At this time can be initially confirmed as a buy signal

3. The final confirmation of buying signal is to observe whether the trading volume can be mildly enlarged

4. Pay attention to whether the brin band width has been in the state of convergence, which is also an important factor in signal confirmation< 4. Precautions for using brin line

1. The setting of brin line parameters should not be less than 6, and the static Qianlong value is usually 10; Dynamic Qianlong is usually set at 20.

2. When using brin line, we should judge whether it is in normal area or abnormal area. In abnormal area, we can't simply sell by breaking the upper limit and buy by breaking the lower limit.

3. Use the opening to narrow down. It's easy to catch bull stocks in the low position, but in the high position or once the opening shrinks, the stock price will break down, and there will be a large space for decline.

4, Brin line can be used with other indicators, the effect will be better, such as trading volume, KDJ indicators, etc.

b, brin line and stock selection

using brin line stock selection is mainly to observe the size of the opening of brin line indicators

don't rush to buy the stocks with a small opening of the brin line index, because the brin line index only tells us that these stocks will break through at any time, but it doesn't tell us the direction of the breakthrough

the method of judging the up and down direction of the stock price when the brin line receives the narrowest:

① observe whether the stock price is running above or below the medium rail, or there is a sign that the stock price falls below the medium rail or obviously stands firm on the medium rail, and the upward movement of the stock price should be combined with whether the trading volume is significantly enlarged. If so, it should intervene decisively, otherwise, Once it falls below the medium track or runs down the track, it is advisable to decisively sell shares

② observe the stock's stock price in recent months, if there was a small rise before, it is more likely that the stock will rebound and stabilize in the medium rail. If there was a huge rise before, we should be on guard against the possibility that the brin line will narrow only in the middle of the decline, and then there will be a sharp drop<

if the following conditions are met, the possibility of upward breakthrough is greater:

first, the fundamentals of listed companies are better

secondly, it is better to stand on the average of 250 days, 120 days, 60 days, 30 days and 10 days

thirdly, it's better to choose the stock whose stock price is at the bottom

Fourth, the best time to buy is when the stock price breaks through in large volume and the opening of brin line index expands

in today's long fluctuation cycle of stock market, the 20 day moving average represented by brin medium rail can provide stronger practical guidance for the band trend and trading point of strong stocks and hot stocks within 2 to 4 weeks

the specific points are as follows:

1. At this point, if the stock price callback, its back to the low end is often the right amount of low short-term entry point. If there is trading volume, investors can actively absorb

2. For the strong stocks operating between brin's medium track and upper track, it's better to draw back the medium track as a low buying point, and take the medium track as its important stop loss line

3. For a period of time, the price and volume of the interval are better, and the cumulative turnover of the interval's positive line is higher than that of the interval's negative line. The stock price is relatively moderate in the early period

4. The positive line of K line combination is more than the negative line, and the positive line entity is longer than the negative line. If the stock price has arc bottom, double bottom, head and shoulder bottom, compound bottom shape is better

5. If the stock price goes up and down for 3 days, or there are too many stocks rushing out of the upper track, and the trading volume can not be released continuously, investors should pay attention to the short-term high settlement

C. brin line and band operation

1. If the stock price is running above the medium track, the opening of brin line will graally narrow, and the upper track, the middle track and the lower track will graally approach. When the value difference between the upper and lower tracks is close to 10%, it is the best time to buy. If the trading volume is significantly enlarged at this time, the signal of the upward breakthrough of the stock price will be more clear

2. When the stock price has a short-term correction after a period of moderate rise, the stock price is blocked near the upper rail, and then returns to the middle rail of brin line. If it is stable for three consecutive days, the middle rail can consider intervention

3. When a stock keeps going up steadily along the brin line between the upper track and the middle track, it is dominated by holding shares or low absorption, which indicates that the stock is in a strong long trend

4. When a stock always moves down the brin line channel step by step between the middle track and the lower track, it indicates that the stock is in the process of decline, so it is not suitable to buy the stock easily, and wait patiently for the real time to buy, until it sees a sharp drop, and the stock price falls out of brin's lower track or stands firm

D. grasp of brin line and intraday buying and selling points

combined with time sharing, brin line can grasp buying and selling points in intraday. According to the most general rules, the stock price should be reversed when it breaks the upper track, and rebound when it breaks the lower track. The daily parameter is 20 days. As long as it breaks through brin's offline track, it is bound to have a corresponding rebound for three consecutive days, and the accuracy rate of indivial stock application is more than 90%

to grasp the trading point of indivial stocks, we often choose the resonance point of 15 minute brin line and 30 minute brin line. First of all, the shape of brin line should maintain the upward channel, and the best shape is the open track. If the stock price falls down along the upper track, open the 15 minute brin line to find the position of the middle track, and then look at the position of the 30 minute and 60 minute middle track. If there is multiple overlapping of stock positions, then there will be a certain resonance point in this position, which should be the best buying point

it is much better to use brin line to find selling points than MACD. The medium track is the standard. If the vertical line falls through the medium track of the 15 minute line, it basically means that the short-term speculation is completed. Once it falls through the medium track of the 30 minute line, the stock price will be adjusted for a period of time. So the short-term friends should leave as soon as possible after crossing the middle track, and wait for the callback before looking for a low point.

10. Boll index
index description
boll uses the standard deviation of statistical principle to calculate its confidence interval
principle of buying and selling
2 when the volatility becomes smaller and the wave band becomes narrower, the intense price fluctuation may proce
immediately
3 when the high and low points cross the side line of the wave band, they immediately return to the wave band, and there will be a shift back
after band 4 starts to move, it enters another band in this way, which is helpful to find out the target value

it should be used in combination with other indicators.