"Oh no! He's got a bow and arrows, withdraw!"

"It's important to run for your life!"

"This little ghost is too strong, hurry up, the wind is tight,!"

"Huh......" Qin Xiuke didn't care that these mountain bandits turned their backs to him, he still had one arrow at a time, ten arrows with one bow, and ten mountain bandits fell forever.

In just a few moments, there were only two or three hundred mountain bandits, and under Qin Xiu's several rounds of shooting, seventy or eighty people actually died!

The other mountain bandits saw that this was completely a murderous maniac, how could they dare to fight hard, dare to catch this person alive, and it was important to run away in a hurry.

"Wow, run! This guy is crazy. ”

"This is a great demon king, brothers, the escape system is coming!"

"What's so scary about the system?"

"The system is not terrible, the critical system is pirated. ”

"It's piracy! Run away......

The word system was created from the transliteration of the English system, which corresponds to the connotation of foreign languages. System refers to the orderly arrangement and arrangement of scattered things to form a holistic whole.

In the theory of digital signal processing, people call the entity that can process and transform digital signals as a system. Since the system that processes digital signals processes the signals at a specified time or time sequence, such a system is regarded as discrete-time, and can also be described in four ways: time-based languages, tables, formulas, and waveforms.

In the abstract, both systems and signals can be thought of as sequences. However, the system is the mechanism that processes the signal, which is different from the signal. People study systems and design systems, use systems to process signals, and serve humans, and systems need other methods to further describe them. Other methods for describing a system include symbols, unit impulse responses, difference equations, and graphs.

Chinese scholar Qian Xuesen believes that a system is an organic whole with specific functions formed by the combination of several components that interact with each other and depend on each other, and this organic whole is a component of the larger system to which it is subordinate.

Generally refers to a group of related individuals who work according to pre-programmed rules and can do the work that individual elements cannot do alone. Systems are divided into two categories: natural systems and man-made systems. A collection of interrelated individuals is called a system.

Chinese scholar Qian Xuesen believes that a system is an organic whole with specific functions formed by the combination of several components that interact with each other and depend on each other, and this organic whole is a component of the larger system to which it is subordinate. The word system in English comes from the ancient Greek word systεmα, which means a whole made up of parts. The definition of a system should encompass the characteristics that are common to all systems. Berta Langfi, the founder of general systems theory, defines "a system as a complex of elements that interact with each other" [2]. This definition emphasizes the interaction between elements and the integration of elements by the system. It can be formulated as follows: Definition 1. If the object set S satisfies the following two conditions

(1) There are at least two different elements in S

(2) The elements in S are related to each other in a certain way

then S is called a system, and the elements of S are the components of the system.

This definition points out three characteristics of the system: one is pluralism, and the system is the unity of diversity and difference. Second, there is no isolated element component in the system, and all elements or components are interdependent, interactive, and mutually restrictive. 3. Wholeness, the system is a composite and unified whole composed of all elements. This definition describes the basic characteristics of a system in general, distinguishing it from a non-system, but it has limitations in defining a complex system. In addition, there is no such thing as a "non-system" in the strict sense of the real world, and there is no such thing as a pluralistic set that constitutes a whole without connection. For some groups where the connections between elements are so weak that they can be ignored, we consider them to be non-systems of the second type.

Here are some conceptual descriptions of systems by thinkers and futurists (from Wikipedia):

1. A system is a dynamic and complex whole, interacting structural and functional units.

2. The system is composed of different elements of energy, matter, and information flow.

3. Systems tend to be made up of entities that seek equilibrium and exhibit oscillating, chaotic, or exponential behavior.

4. An overall system is a temporarily interacting part of any interdependent set or group.

The author believes that the fourth concept description is more reasonable. The 'part' is made up of the system itself and other parts, which in turn are parts or "sub-wholes" that make up other systems. It not only summarizes the general characteristics of the system, but also introduces the concept of space-time and dynamics, that is to say, any system is not eternal, but temporary and dynamic.

Systems are ubiquitous in the universe, from elementary particles to extragalactic galaxies, from human society to human thinking, from the inorganic world to the organic world, from natural science to social science. According to the macro level, it can be roughly divided into natural system, artificial system, and composite system.

Natural Systems:

Individuals in a system exist or evolve according to the laws of nature, producing or forming the natural phenomena and characteristics of a group.

Natural systems include ecological balance systems, living organism systems, celestial systems, material microstructure systems, and social systems.

Manual system:

Individuals within the system operate according to artificial, pre-programmed rules or planned directions to achieve or accomplish functions, performance, and results that cannot be achieved by individual individuals in the system.

Artificial systems include stereo imaging systems, production systems, transportation systems, power systems, computer systems, education systems, medical systems, enterprise management systems, and so on.

Composite system:

A composite system is a combination of natural and artificial systems.

Composite systems include navigation systems, traffic management systems, and man-machine systems, among others.

In the process of creating cybernetics, Wiener regarded the communication and control of animals and machines as a system.

In order to clarify the object of study, the matter or space is artificially separated from the rest of the matter or space, and the demarcated object of study is called the system.

In thermal, a certain mass of gas is usually taken as the object of study, and this object of study is called a system

In fluid mechanics, the collection of numerous fluid particles is called a system

The human body is composed of eight systems: locomotor system, nervous system, endocrine system, circulatory system, respiratory system, digestive system, urinary system, and reproductive system

Chinese Dictionary

1. Self-contained organization: a whole composed of similar things according to a certain order and internal connections.

Use case:

Qin Mu's "We Need Biographical Literature": "Someone once drew the branches of a tree to describe the system of biological evolution, which was called a 'biological tree'. ”