The principle of a solid-state hard drive is a computer storage device that mainly uses memory as a permanent memory. The solid state here is mainly compared to the magnetic disk that drives the head rotation to achieve read and write operations. MAND or other solid state Store the different records 0 and 1 of the potential level or the scent state
If you want the computer to work, you must first compile the program, and then send it to the memory through the input device to save it, and the program is stored. The following is the execution of the program instructions. The execution of the conditional instructions can be divided into the following four basic operations:
(1) Fetch instruction: fetch the instruction to be executed from an address in the memory and send it to the instruction register of the CPU section. live.
(2) Analyze the instruction: send the instruction stored in the instruction register to the instruction decoder, and decode the micro-operation corresponding to the instruction.
(3) Execution instruction: The fundamental instruction is decoded, and the corresponding control signal is sent to each component to complete various operations specified by the instruction.
(4) Prepare for the execution of the next instruction, that is, take out the address of the next instruction.
Today’s society is a fast-growing society, with advanced technology and information circulation, communication between people is getting closer, and life is getting more and more convenient. Big data is the product of this high-tech era. Big data is not there, but the useful value content mining and cost-effectiveness are more important. Large-scale data is the key to winning the competition
The value of big data is reflected in the following aspects:
1. Companies that provide products or services to a large number of consumers can use big data for precision marketing
2. Small and beautiful mid- to long-tail companies can use big data to transform services
3. Traditional enterprises that must transform under the pressure of the Internet need to keep pace with the times and make full use of the value of big data.
Data is the result of facts or observations. It is a logical induction of objective things. It is an unprocessed raw material used to represent various observations.
Reasons:
(1) Simple technical implementation
(2) Simplify the operation rules. The sum of two binary values
(3) Suitable for logic operations
(4)Easy to transform
(5) The binary representation of data has strong anti-interference ability
So people want to participate in the operation of the sign bit, and only keep the addition, thus Simplified computer operations, invented the original code, inverted code
The original code and the inverted outer code are all signed. The method of expressing numbers in binary has a sign bit and a numerical value. Let’s look at the original code. .
Original code
The original code is the absolute value of the sign bit plus the true value. The first bit is used to indicate the value of the rest of the sign.
Positive number The one’s complement is the one of its own negative number, and the one’s complement is based on the original code, and the sign bit is not the inverse of the rest of the numbers.
The way to express the complement code is:
The complement of a positive number is itself
The complement of a negative number is based on the original code, and the symbol The bit remains the same, the rest of the bits are reversed, and finally +1 (that is, +1 on the basis of the reverse horse)
In the computer system, the value is always represented by the complement code (stored)
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