Mining machine dgx2
Publish: 2021-04-25 08:15:50
1. Binary coded decimal number is called BCD code for short. In this method, the combination of 4-bit binary code is used to represent the 10 number symbols of decimal number: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. There are 16 combinations of 4-bit binary numbers. In principle, 10 of them can be selected as codes, representing the 10 decimal symbols of 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. The most commonly used BCD code is called 8421BCD code. 8.4.2.1 is the bit value of 4-bit binary respectively. Click here to give the corresponding relation table of decimal number and 8421BCD code< Conversion between BCD code and decimal number
conversion between BCD code and decimal number is intuitive, and mutual conversion is also very simple. Convert decimal number 75.4 to BCD code, for example:
75.4 = (0111 (0101.0100) BCD if convert BCD code 1000 0101.0101 to decimal number, for example: (1000 0101.0101) BCD = 85.5
note: the number represented by the same 8-bit binary code, When we think that it represents a binary number and that it represents a binary coded decimal number, the value is not the same
for example: 00011000, when it is regarded as a binary number, its value is 24; But as a 2-bit BCD code, its value is 18< Another example is 00011100. If we regard it as a binary number, its value is 28, but it can't be regarded as BCD code, because in 8421BCD code, it is an illegal code.
2. BCD code format
there are two formats of BCD code in computer, that is, separate BCD code and combine BCD code
the so-called separated BCD code is to use the lower four bits of a byte to represent one bit of a decimal number. For example, the storage format of number 82 is:
\_ 1 0 0 0 _ _ _ _ 0 0 1 0 where_ Represents an unrelated value
combined BCD code is to store two decimal numbers in a byte. For example 82, the storage format is 1000 010
3. Addition and subtraction operation of BCD code
because the code represents each decimal number with a group of 4-bit binary numbers, if the BCD code is directly sent to the computer for operation,
the computer always treats the number as a binary number, So the results can go wrong. Example: using BCD code to find 38 + 49
the solution is to use & quot; Add 6 correction, which is called BCD adjustment. That is to say, the result of binary addition is modified to that of BCD code addition. When two two bit BCD numbers are added, the result of binary addition is modified by correction rules. Correction rules:
(1) if the result of the addition of any two corresponding BCD numbers has no carry to the higher bit, if the result is less than or equal to 9, then the BCD number does not need to be corrected; If the result is greater than 9 and less than 16, the bit is corrected by adding 6
(2) if the result of the addition of any two corresponding BCD numbers has a carry to the higher bit (that is, the result is greater than or equal to 16), the bit is corrected by adding 6.
(3) when the result of the lower correction makes the high bit greater than 9, the high bit is corrected by adding 6
an example is given to verify the correctness of the above rules
using BCD code to find 35 + 21, BCD code to find 25 + 37, BCD code to find 38 + 49, BCD code to find 42 + 95; Borrow one for sixteen; And & quot; Borrow one for ten; The difference between the two results will be 6 more than the correct result; Minus 6 correction method & quot; When two BCD codes are added and subtracted, the binary addition and subtraction instructions are used first, and then the BCD adjustment instructions are used to adjust the results, and the correct decimal operation results can be obtained. In fact, there are not only adjustment instructions for combining BCD numbers, but also adjustment instructions for separating BCD numbers. In addition, the addition and subtraction operation of BCD code can also be transformed into binary number by the program before operation, then the binary number can be processed by the computer, and then the binary number result can be converted into BCD code by the program after operation.
conversion between BCD code and decimal number is intuitive, and mutual conversion is also very simple. Convert decimal number 75.4 to BCD code, for example:
75.4 = (0111 (0101.0100) BCD if convert BCD code 1000 0101.0101 to decimal number, for example: (1000 0101.0101) BCD = 85.5
note: the number represented by the same 8-bit binary code, When we think that it represents a binary number and that it represents a binary coded decimal number, the value is not the same
for example: 00011000, when it is regarded as a binary number, its value is 24; But as a 2-bit BCD code, its value is 18< Another example is 00011100. If we regard it as a binary number, its value is 28, but it can't be regarded as BCD code, because in 8421BCD code, it is an illegal code.
2. BCD code format
there are two formats of BCD code in computer, that is, separate BCD code and combine BCD code
the so-called separated BCD code is to use the lower four bits of a byte to represent one bit of a decimal number. For example, the storage format of number 82 is:
\_ 1 0 0 0 _ _ _ _ 0 0 1 0 where_ Represents an unrelated value
combined BCD code is to store two decimal numbers in a byte. For example 82, the storage format is 1000 010
3. Addition and subtraction operation of BCD code
because the code represents each decimal number with a group of 4-bit binary numbers, if the BCD code is directly sent to the computer for operation,
the computer always treats the number as a binary number, So the results can go wrong. Example: using BCD code to find 38 + 49
the solution is to use & quot; Add 6 correction, which is called BCD adjustment. That is to say, the result of binary addition is modified to that of BCD code addition. When two two bit BCD numbers are added, the result of binary addition is modified by correction rules. Correction rules:
(1) if the result of the addition of any two corresponding BCD numbers has no carry to the higher bit, if the result is less than or equal to 9, then the BCD number does not need to be corrected; If the result is greater than 9 and less than 16, the bit is corrected by adding 6
(2) if the result of the addition of any two corresponding BCD numbers has a carry to the higher bit (that is, the result is greater than or equal to 16), the bit is corrected by adding 6.
(3) when the result of the lower correction makes the high bit greater than 9, the high bit is corrected by adding 6
an example is given to verify the correctness of the above rules
using BCD code to find 35 + 21, BCD code to find 25 + 37, BCD code to find 38 + 49, BCD code to find 42 + 95; Borrow one for sixteen; And & quot; Borrow one for ten; The difference between the two results will be 6 more than the correct result; Minus 6 correction method & quot; When two BCD codes are added and subtracted, the binary addition and subtraction instructions are used first, and then the BCD adjustment instructions are used to adjust the results, and the correct decimal operation results can be obtained. In fact, there are not only adjustment instructions for combining BCD numbers, but also adjustment instructions for separating BCD numbers. In addition, the addition and subtraction operation of BCD code can also be transformed into binary number by the program before operation, then the binary number can be processed by the computer, and then the binary number result can be converted into BCD code by the program after operation.
2. ACDSee is just a tool for image viewing and management. Although it has some image processing functions, these functions are very single. It can't synthesize several photos into one. If you want to synthesize multiple photos into one, just use Photoshop. As long as you learn a little Photoshop, you can do it.
3. 1. One click buying and selling: just input the amount you want to buy or the number of bitcoin you want to sell, you can successfully buy or sell bitcoin, which is simple and fast
2. Limit Trading: an investor can set a buying price lower than the market price or a selling price higher than the market price. When the market price fluctuates to its set price, the transaction is concluded<
3.
market price transaction: the transaction at the current market price can ensure the timely transaction of investors' trading orders to a certain extent, but at the same time, before the market price order is placed, the investors can not predict the transaction price and there is certain uncertainty
4. Planned transaction: after holding a position, you can set planned transaction to stop profit and loss, preset stop profit trigger price and stop profit commission price, stop loss trigger price and stop loss commission price.
2. Limit Trading: an investor can set a buying price lower than the market price or a selling price higher than the market price. When the market price fluctuates to its set price, the transaction is concluded<
3.
market price transaction: the transaction at the current market price can ensure the timely transaction of investors' trading orders to a certain extent, but at the same time, before the market price order is placed, the investors can not predict the transaction price and there is certain uncertainty
4. Planned transaction: after holding a position, you can set planned transaction to stop profit and loss, preset stop profit trigger price and stop profit commission price, stop loss trigger price and stop loss commission price.
4. It can't be converted. Simply by the value of the weekly gift package. 4000-5000 Because Tianqi's flagship needs rare mineral manufacturing mole. So it's a little bit more expensive than the firepower flagship.
5. Remove the installation directory after the uninstall
6. AB parallel CD, ∠ BAC = ∠ ACD
because AE bisection ∠ BAC intersects BC with E, CF bisection ∠ ACD intersects ad with F,
so, ∠ BAE = ∠ ACF, so AE parallel CF
and AF parallel CE,
so, quadrilateral aecf is parallelogram
let's see what others say.
because AE bisection ∠ BAC intersects BC with E, CF bisection ∠ ACD intersects ad with F,
so, ∠ BAE = ∠ ACF, so AE parallel CF
and AF parallel CE,
so, quadrilateral aecf is parallelogram
let's see what others say.
7. The second Galaxy attribute wash is to return 100% of the white money spent? The second Galaxy attribute wash is to return 100% of the white money spent? The second Galaxy attribute wash is to return 100% of the white money spent?
8. (*^__^*)
hee hee... I'm also a sophomore in high school. Come on, everyone
this is relatively clear. I don't know what you have learned. You can delete my process according to your learning progress
connect AC
because it is a cube
so B & # 39; B⊥AB,B' B ⊥ BC, because AB and BC hand over to B,
so B & # 39; B ⊥ plane ABCD, and because AC belongs to plane ABCD,
so BB & # 39; ⊥ AC,
because it is a cube, so AC ⊥ BD, and because BD, BB & # 39; It is called B,
so AC ⊥ plane BB & # 39; D.
so AC ⊥ BD & # 39
connect a & # 39; D,
A' B' ⊥ plane a & # 39; D' Da
so D & # 39; A⊥A' B', And because of ad-39; ⊥A' D
and a & # 39; D、A' B' Hand over to a & # 39
so ad & # 39; ⊥ plane a & # 39; DB'
so ad & # 39; ⊥DB',
because of AD & AC intersects a
so DB ′⊥ plane ACD ′
hee hee... I'm also a sophomore in high school. Come on, everyone
this is relatively clear. I don't know what you have learned. You can delete my process according to your learning progress
connect AC
because it is a cube
so B & # 39; B⊥AB,B' B ⊥ BC, because AB and BC hand over to B,
so B & # 39; B ⊥ plane ABCD, and because AC belongs to plane ABCD,
so BB & # 39; ⊥ AC,
because it is a cube, so AC ⊥ BD, and because BD, BB & # 39; It is called B,
so AC ⊥ plane BB & # 39; D.
so AC ⊥ BD & # 39
connect a & # 39; D,
A' B' ⊥ plane a & # 39; D' Da
so D & # 39; A⊥A' B', And because of ad-39; ⊥A' D
and a & # 39; D、A' B' Hand over to a & # 39
so ad & # 39; ⊥ plane a & # 39; DB'
so ad & # 39; ⊥DB',
because of AD & AC intersects a
so DB ′⊥ plane ACD ′
9. ABC is an isosceles triangle with equal base angles. DBC is also an isosceles triangle with equal base angles. Abd and ACD are equal by subtracting the base angles
10. Hello, if this happens, and after you double-click the image, it is not ACDSee that opens the image, it is mostly because the file association has been changed. Re enter ACDSee to modify the file association
modification method:
take ACDSee
Pro3 as an example, open ACDSee
Pro3, click "tools" in the top menu, then click "file association", then select "set file association", and then select "all graph types"
e to the version of ACDSee, there are different ways to set it. If there is no "set file association" item in the "tools" menu, you can also go to "options" in the "tools" menu to have a look. Most of them will have file association settings. I hope it can help you.
modification method:
take ACDSee
Pro3 as an example, open ACDSee
Pro3, click "tools" in the top menu, then click "file association", then select "set file association", and then select "all graph types"
e to the version of ACDSee, there are different ways to set it. If there is no "set file association" item in the "tools" menu, you can also go to "options" in the "tools" menu to have a look. Most of them will have file association settings. I hope it can help you.
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