The work of electronic computer is based on the principle of electronic pulse circuit, and its functional components are composed of electronic circuits, in which the propagation of electric field plays a major role. We know that the electromagnetic field travels very fast, and today's high-performance computers can perform tens of billions of addition operations per second. If a person can complete an operation in one second, it will take more than 100 years for a person to work on an ordinary electronic computer for one hour. In many cases, the speed of operation plays a decisive role. For example, computer-controlled navigation requires "faster computing speed than aircraft"; Meteorological forecast needs to analyze a lot of data, such as manual calculation takes ten days and a half months, which loses the significance of forecast. With the computer, the weather forecast of an area in a few days can be worked out in a few minutes.

2. High enough calculation accuracy

The calculation accuracy of electronic computer is not limited in theory. Ordinary computers can reach 15 significant digits, and any accuracy requirements can be achieved by certain technical means. A famous mathematician in history, Jackson Yee, once spent 15 years to calculate pi, and only ranked 707th. Give it to the computer now, and it will be 65438+ million digits in a few hours.

3. Super memory ability

There are many storage units in the computer for memorizing information. Internal memory ability is an important difference between electronic computers and other computing tools. Because it has the ability of memory information, it doesn't need to fetch data from the outside every time in the operation process. It only needs to input the data into the memory unit in advance, and it can directly fetch data from the storage unit in the operation process, which greatly improves the operation speed. The capacity of computer memory can be made very large, and its memory is particularly strong.

4. Complex logic judgment ability

People are capable of thinking. Thinking ability is essentially a kind of logical judgment ability, which can also be said to be causal analysis ability. With the help of logical operation, the computer can make logical judgments, analyze whether the proposition is established, and make corresponding countermeasures according to whether the proposition is established. For example, there is a "four-color problem" in mathematics, which says that no matter how complicated a map is, only four colors are needed at most, so that adjacent areas can have different colors. 100 For many years, many mathematicians have been trying to prove it or overthrow it, but there has been no result, which has become a famous problem in mathematics. 1976, two American mathematicians used computers for very complicated logical reasoning, and finally verified this famous conjecture.

5. Ability to work automatically according to procedures

Ordinary machines are controlled by people. When a person gives a command to a machine, the machine is completed and becomes an operation. The operation of the computer is also controlled by people, but because the computer has internal storage capacity, instructions can be input into the computer in advance and stored. After the computer starts to work, the instructions can be taken out from the storage unit in turn to control the operation of the computer, so that people can realize the automation of operation without interfering with the work of the computer. This working mode is called program control mode.