A computer knowledge e-book that will benefit you for life
The reference material mentioned "Computer Knowledge Jiuzhou Wenxin| Xiao Ping. The content of this e-book contained computer related knowledge, such as the basic indicators of the computer, whether the computer can beat the human brain, the basic functions of the computer, why the computer has memory ability, etc. It might be helpful to understand computer knowledge. However, it did not specifically mention whether this knowledge would be useful for a lifetime. It could only be used as a reference option for computer knowledge e-books. Read more exciting novels for free
Introduction of Basic Computer Knowledge
Basic computer knowledge could be summarized from the following aspects: ** 1. Computer System Constitution ** 1. ** hardware system ** - ** History ** - The first generation of computers (1946 - 1957) was in the era of vacuum tubes; the second generation of computers (1958 - 1964) was in the era of transistors; the third generation of computers (1965 - 1970) was in the era of integrated circuits; and the fourth generation of computers (after 1971) was in the era of large-scale integrated circuits. In 1946, the world's first computer, ENIAC, was born at the University of Pennsylvania. It used 17468 tubes, covered an area of 170 square meters, weighed 30 tons, consumed 174 Kilowatts of electricity, cost more than 400,000 US dollars, and could perform 5000 addition and substitution operations per second. - ** The hardware composition under the Von-Neummann architecture ** - It was composed of five parts: arithmetic unit, controller, memory, input device, and output device. The arithmetic unit and the controller formed the CPU (central processing unit), which was the most important part of the entire computer system. - ** Divided by Scale ** - ** Supercomputer **: It is used in cutting-edge national defense technology and modern scientific computing. The computing speed can reach more than 100 billion times per second. For example, China's "Tianhe-1" is a petascale supercomputer. - ** Large computer **: High computing speed, capable of executing tens of millions of instructions per second, large storage space, commonly used for scientific computing, data processing, or as a network server, such as the iPhone Z13 mainframe. - ** Miniature computer **: Small scale, simple structure, low operating environment requirements, used for industrial automatic control, measuring instruments, data acquisition in medical equipment, etc. - ** Microcomputer **: The CPU uses a microchip chip. It is small and light. It is widely used in business, service industry, factory automatic control, office automaton, and popular information processing. - ** Server **: A high-performance computer that provides various services to the client computer. According to the application function, it can be divided into Web servers, database servers, and other types; according to the appearance, it can be divided into tower servers, blade servers, and rack servers. 2. ** software system **: Together with the hardware system, they form a computer system. The two complement each other, but the reference materials do not describe the details such as the classification of software systems. 3. ** Computer Network **: This is the part about the wonderful world of computers, but the reference materials did not provide a detailed summary of the basic knowledge points related to computer networks. ** 2. Computer hardware related ** 1. **CPU（Central Processing Unit）** - It was composed of a controller and an arithmetic unit, and was the core component of a computer system. The server's CPU included Intel's Xeon, Itanium, and so on. Different CPU had different main frequencies (the CPU's clock frequency, in Hertz). The main frequency affected the CPU's operating frequency during computing. 2. ** Server hardware composition and classification ** - ** Tower Server **: An early server form. Its appearance is similar to that of a stand-up PC. It has a large case space, a strong expansion capability of the main board, and many slots. The internal space is reserved for the redundant expansion of the hard disk and power supply. The design takes noise reduction into consideration. It is rarely used at present. - ** Blade Server **: Multiple card server units can be inserted into a standard-height rack-type case to achieve high utilization and density. It can be managed in a central manner, with high performance, flexible expansion, and configuration on demand. It can be combined into a server cluster to share resources. - ** Rack-mounted servers **: designed according to a unified standard, used with cabinets, easy to manage, high density, and space-saving. The width is 19 inches (48.26cm), and the height is in units of U (1U = 1.75 inches = 44.45mm). There are commonly 1U, 2U, and 3U standards. Currently, most of them are sold. "A Short History of the Future: Legends of the Intelligent Era" was equally exciting. Everyone was welcome to click and read it!
Basic knowledge of computer principles
The following are some basic knowledge of computer principles: 1. ** Numbering System Conversion **: Including conversion between binaries, octals, decimals, and hex. 2. ** Code representation **: The representation of original code, complement code, complement code, and code shift. 3. ** Number representation **: The representation of fixed-point numbers and floating-point numbers, as well as the addition, multiplication, and division of fixed-point numbers and floating-point numbers. 4. ** logical operations **: And (AND), or (OR), not (NOT) and other logical operations. 5. **CPU related ** - ** Structure and Function **: The full name of CPU is Central Processing Unit, which is the core component of a computer. It was mainly composed of a control unit and an arithmetic logic unit (ALU). In terms of functions, it was composed of four parts: a register, a controller, an arithmetic unit, and a clock. - ** Work flow **: The core work process can be divided into three key stages: extraction, decoding, and execution. That is, the instructions are extracted from the main memory of the system, the actual content of the instructions is deciphered, and then the relevant parts execute the instructions. - ** Registers Type and Function **: Registers can temporarily store instructions, data, and addresses. Registers with different functions include the accumulating register.(Store data after operation and calculation), Flag register (Reflects the processor's state and the characteristics of the operation results, controls the execution of instructions), program counter (stores the address of the unit where the next instruction is located), base register (stores the starting position of the memory where the data is stored), index register (stores the relative address of the base register), general register (stores any data), instruction register (stores the instructions that are being executed, used internally by the CPU, and cannot be read or written by the programmer), stack register (the starting position of the storage stack area), etc. 6. ** Controllers and logic gates ** - ** Transcendence **: An electronic switch that can control the flow of electric current through electrical signals. There were three terminal: collector, transmitter, and base. When a small current was applied to the base, it could act as a conductor to allow the current to pass through. Otherwise, it could act as an insulation to prevent the current from flowing between the collector and the transmitter. - ** logic gate **: It is constructed from a single crystal, such as an AND gate, an OR gate, a NOT gate, an Exclusive OR gate, etc. It is the basis for building more complex circuits. Different logic gates have different input and output rules. For example, an AND gate has an output of 1 if both of its input are 1, and an OR gate has an output of 1 if one of its input is 1. 7. ** Arithmetic logic unit (ALU)**: It is a component inside the CPU that is responsible for performing arithmetic and logic operations. It can recognize and perform specific arithmetic operations through the decode. 8. ** Command identification **: The CPU uses opcode to identify and execute different types of commands. "A Short History of the Future: Legends of the Intelligent Era" was equally exciting. Everyone was welcome to click and read it!
I recommend a good book that will benefit me for life.
I recommend a good book, Alive, by Yu Hua. This book tells the story of a Chinese farmer who has experienced the ups and downs of life, the joys and sorrows, and shows us the fragility and preciousness of life. This book profoundly reveals the complexity of human nature and how to maintain courage and hope in life. It was not only a novel, but also a touching literary work that deserved to be read by everyone.
Life knowledge, general knowledge
The general knowledge of life included practical general knowledge in all aspects, covering safety, health, medicine, and other fields. In daily life, we can use some simple methods to ensure safety, such as safe electricity, dust in the eyes, and so on. At the same time, knowing some health common sense can also help us better maintain our health, such as the normal heart rate, the range of body temperature, etc. In addition, there were some medical knowledge and emergency safety knowledge, such as not having to hang an expert number when seeking medical treatment, traffic safety knowledge, etc. In short, the encyclopedia of common knowledge of life provided many practical little knowledge that could help us better cope with various situations in daily life.
Life Knowledge
The purpose of life science was to teach people practical common sense and scientific knowledge. Through popular science, people could learn some practical common sense about food preservation, how to deal with dust in the eyes, how to relieve toothache, how to solve nasal obstruction, and so on. In addition, the popular science also included some interesting scientific knowledge about stars twinkling, sunflowers facing the sun, fireflies shining, and so on. In daily life, we should also pay attention to maintaining healthy living habits, such as reasonable diet, scientific exercise, smoking and alcohol restriction, psychological balance, etc., as well as good hygiene habits and living habits. In addition, it was also important to understand some medical knowledge, such as normal heart rate, normal body temperature, etc. In short, the purpose of life science was to improve people's quality of life and health, so that people could better understand and deal with various life problems.
Life Knowledge
Life knowledge science referred to the public's scientific knowledge about health, hygiene, lifestyle, etc., aimed at improving people's scientific literacy and health awareness. The popular science knowledge included general knowledge in various fields, such as why stars twinkled, why sunflowers always bloomed towards the sun, why fireflies shone, and so on. In addition, there were some common sense related to health, such as normal heart rate, normal body temperature, and so on. These popular science tips could help people better understand and understand the world and improve their quality of life.
Life Knowledge
Popular science knowledge can help us better understand some common problems and phenomena in daily life. We can get some general knowledge of life. For example, regarding the problem of food preservation, according to the information in " Common Sense in Popular Science Life," it was recommended to put the food in the refrigerator in time to prevent the growth of bacteria, regardless of whether the food was hot or cold. In addition," 100 Practicable Common Senses of Life " also mentioned some interesting common sense. For example, when dust enters your eyes, you can close your eyes and cough a few times, and the dust will come out on its own. If you eat spicy food, you can put some salt in your mouth and it will not be spicy. In addition, Health Science also mentioned some health habits and lifestyle science knowledge, such as frequent hand washing, frequent bathing, regular oral health checks, etc. In short, life knowledge can help us maintain our health and improve our quality of life.
Life Knowledge
Life science referred to the use of various media to spread scientific knowledge about daily life to the public in an easy to understand manner. Its purpose was to raise the public's awareness of health, safety, and the environment, cultivate scientific literacy, and help people make smarter decisions and behaviors. The popular science knowledge could cover various fields, such as health science, common sense of life, food hygiene, and common sense of natural phenomena. Through the spread of popular science knowledge, people could better understand and deal with various situations and problems in their daily lives.
Life Knowledge
Life science referred to the spread of all kinds of scientific knowledge and common sense related to life in daily life. This knowledge could involve food safety, healthy lifestyle, environmental protection, safety knowledge, and so on. Through popular science activities and publicity, people could learn how to properly preserve food, how to prevent diseases, how to protect the environment, and other practical knowledge, thereby improving the quality of life and health. The popular science activities could be carried out through various channels, such as community propaganda, media reports, school education, etc., with the aim of letting more people understand and apply this knowledge, and promoting the scientific literacy and healthy development of society.
Life Knowledge
Life science referred to the use of various media to spread scientific knowledge about daily life to the public in an easy to understand manner. The purpose of the popular science activities was to let people understand and master the basic common sense of healthy living, improve scientific literacy, and promote the cultivation of a healthy lifestyle. The popular science content included reasonable diet, scientific exercise, smoking and alcohol restriction, psychological balance, and other four health foundations, as well as good hygiene habits, living hygiene habits, and food hygiene habits. In addition, the popular science also involved the publicity and education of cancer prevention and treatment knowledge, as well as emergency safety knowledge. Through popular science activities, people could better understand and deal with health and safety issues in their daily lives.