Calculation force t and M

1. First add a read lock to the database to be backed up, then use flush tables to write the data in memory back to the database on the hard disk, and finally the database file to the target directory.

2. Through the expression, I find that M moves to the negative direction first, and then returns to the origin after a period of time and advances to the positive direction.
we can find out when m reaches the farthest point in the negative direction (that is, when the velocity is 0) by deriving the formula.
the solution is t = 2,
so when t = 3, M is on the way back to the origin.
at this time, the distance is divided into two parts, that is, before t = 2 and between 2 and 3 seconds.
take t = 2 into the formula to get s = - 14, and take t = 3 into the formula to get s = - 7.
so the total distance is 14 + (14-7) + 2 = 23

3. M / T mode in Unicom 3G is to charge multimedia content and text content according to different standards. M is the first letter of media, which is the pricing unit of multimedia content. T is the first letter of text, which is the pricing unit of text content. Text content includes browsing and downloading of text-based content.

4.

Flow t and G, m, conversion: 1024MB = 1GB, 1TB = 1024gb, the specific analysis is as follows:

conversion: 1B (byte) = 8bit

1KB (kilobyte) = 1024b

1MB (megabyte for short) = 1024KB

1GB (gigabyte, also known as "Gigabyte") = 1024MB

1TB (terabyte) = 1024gb

Therefore, 1024MB = 1GB, 1TB = 1024gb

extended data:

mobile traffic refers to the traffic data generated by mobile Internet. When using mobile phone to open software or operate Internet, it will exchange data with the server, and mobile traffic refers to the size of the data

in our actual Internet application, we often see words such as 128kbps (KBGS), 103kb / s and so on when we download software. Because the unit of line bandwidth provided by ISP is bits, while the general download software displays bytes (1 byte = 8 bits), we can get the actual value through conversion

reference source: Network GB

5. T, section T (Terabyte), computer storage components (Terabyte), computer storage components and TBB is also used by TBB. 1TB=1024GB=1024GB=1024 times 1024*1024MB, 1024*1024MB..

1KB / >1KB=1024B
1MB=1024KB / >1MB=1024KB=1024KB / >1MB=1024KB=1024KB / >1GB=1024KB / >1GB=1024KB / >1GB=1024GB />1EB=1024PB
1ZB=1024EB
1YB=1024ZB

6. M and t is a new billing mode for 3G services of China Unicom, which is no longer limited to traffic billing. Where m stands for multimedia resources, such as videos and music, and t stands for text resources. The advantage of this billing method is that it clearly indicates the actual price, such as how much m or t a resource is

reference: the Internet knows

7. Hello, the flow conversion relation is 1t = 1024g 1g = 1024MB 1MB = 1024KB 1KB = 1024b

8. The whole meaning is to generate a new node and insert it into the data link (it should be a closed chain, that is, head to tail connection)

L is the initial node in the whole chain. When there is only one node, the next of the node points to itself. Also as the last node
the new node P will be inserted into the data link as the last node< br />
RLinkList p= (RLinkList) malloc ( sizeof(RLNode) );// Generate data node space
p - & gt; data=t; // Save the data of the node. T is the input data and also the data in the node
p - & gt; next=L-> next; // L stands for the last node (should be the prefix of last), l's next refers to the heading, and P will be the last node
L - & gt; next=p; // P will be the next node of L, that is, the new last node
L = L - & gt; next; // Set the last node to P, which is actually L = P;

9. M / T is a special pricing unit for China Unicom's 3G business, which can only be consumed on Unicom's "Wo" official website
m is the value unit of multimedia content. Unicom 3G users charge m for watching videos and playing songs through the official website, 1m = 1 yuan
t is the value unit of text content. Unicom 3G users charge t for browsing news and reading novels through the official website, 1t = 0.2 yuan
Unicom 3G packages give a certain amount of m value and t value every month.

10. T series CNC system is used in CNC lathe. Generally, there are two servo axes, which can be interpolated at the same time
M series CNC system is used for CNC milling machine or machining center. Generally, there are three servo axes, which can be interpolated at the same time.