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Philosophical definition of time: Time is an integral part of concrete things, the existence and manifestation of movement, the object of understanding that people decompose and abstract from concrete things, the unity of opposites composed of absolute abstract things and relative abstract things, meta-ontology and meta-entity, and an ordinary individual member that exists in the world collective and cannot be felt but can be known.

Time is an integral part of concrete things, and it is a general rule of concrete things. The concrete things that people can see with their eyes and touch with their hands are all concrete things in a certain period of time, and they all have specific rules of time. The concrete things without time rules simply do not exist.

A person has a life span, and a tree has a life span. The earth, the sun and the Milky Way known to mankind are all concrete things that exist in a certain period of time. After a certain period of time, people are not the same specific person, trees are not the same specific tree, and the earth, sun and galaxy are not the same specific earth, sun and galaxy.

Time is the existence and manifestation of movement.

there are two concrete forms of existence and expression of movement: behavior and existence. Behavior is a relatively obvious movement, and existence is a relatively static movement.

all behaviors, phenomena and things have specific time rules for their occurrence, development and ending, and time is the manifestation of their occurrence, development and ending.

behaviors, phenomena and things can only happen in a certain period of time, and can only be shown to people in a relatively short period of time. At a fixed point in time, even the arrows shot with a bow are fixed. Only in a period of time can the arrows be displaced, and the movement of the arrows can only be shown when they move from one place to another.

unlike the behaviors, phenomena and events of concrete things, the existence and relative static motion of objects can only be shown to people in a fairly long period of time. The natural oxidation of metals, the natural growth of plants and the normal development of animals are all relatively static movements, and they are the existence and manifestations of concrete things. A relatively long period of time is the existence and manifestations of oxidation, growth and development.

Time is the cognitive object that people decompose and abstract from concrete things.

Movement is an integral part of concrete things, the existence and manifestation of concrete things, and the cognitive object that people decompose and abstract from concrete things. Time is an integral part of movement, a manifestation of behavior and existence, and a cognitive object that people decompose and abstract from behavior and existence. Therefore, it can be said very accurately that time is the cognitive object that people decompose and abstract concrete things many times, and decompose and abstract them from concrete things.

Time is the unity of opposites composed of absolute abstract things and relative abstract things, meta-ontology and meta-entity.

Absolute abstract things or meta-ontologies are the general rules, laws, properties and essence shared by every concrete thing and every relative abstract thing, and they are the cognitive objects that people decompose and abstract from every concrete thing and relative abstract thing.

relatively abstract things or meta-entities are the special provisions, laws, performance and essence of individual concrete things or individual kinds of concrete things, and they are the cognitive objects that people decompose and abstract from different individuals and different kinds of concrete things.

Everything can be divided into two parts, and time is no exception. Time is the unity of opposites composed of concrete time and general time.

what is the specific time? Concrete time is a time with a specific quantity, a time period with a specific length, a concrete existence and manifestation of general time, and a relatively abstract thing or meta-entity existing in concrete things.

what is ordinary time? General time is a time with no specific quantity, a time period with no beginning and no end, unlimited length, the essence and content of specific time, and an absolute abstract thing or meta-ontology existing in concrete things and relatively abstract things.

time is a unity of concrete time and general time, concrete time is a relatively abstract thing or meta-entity existing in concrete things, and general time is an absolute abstract thing or meta-ontology existing in concrete things, so time is also a unity of relatively abstract things and absolute abstract things, meta-entities and meta-ontologies.

Time is an ordinary individual family member who can't be felt but can be known in the world.

the world is a unity of individual concrete things. Individual concrete things are ordinary individual family members who exist in the world collective and can be felt by human sensory organs.

concrete things are the cognitive objects containing many regulations, the sum of various regulations and the unity of diversity. By comparing different specific things, people can find that each specific thing has its own special provisions and universal provisions, and then decompose and abstract the special and universal provisions of specific things from individual specific things and name them, thus forming and producing various abstract things that cannot be felt but can be known by people.

Abstract things are the components of concrete things, the provisions, performance and essence of concrete things, the decomposition body formed and produced by the decomposition of concrete things by people's thinking and the gradual abstraction, and the ordinary individual family members existing in the large group of concrete things.

Time is an abstract thing expressed by common nouns. Like other abstract things expressed by common nouns, it is an object of cognition that cannot be felt by human sensory organs. People's eyes can't see abstract people, mountains and fruits, and people's hands can't touch abstract tools, water without temperature and stones without hardness. Time, stones, fruits, tools and water are abstract things that can't be felt but can be known, and they are all equal individual family members in the concrete things.

The world is a unity of concrete things, and individual concrete things are ordinary individual members of the world collective. Abstract things are components of concrete things and ordinary individual members of concrete things. Therefore, every concrete thing and every abstract thing is a component of the world, and the world exists in every concrete thing and every abstract thing, and every concrete thing and every abstract thing is an ordinary individual member with its own rules in the world.

Time is a description of the relative speed of motion between objects.

The physical quantity that measures the interval between two moments is called "time". It represents the continuity and sequence of the material movement process. The period of any kind of periodic movement can be used as the time standard, such as the water leakage in ancient China, and the twelve earthly branches (Zi, Ugly, Yin, Mao ...) all use the periodic timing method. Time is a basic physical quantity in physics. A period of time is represented by a line segment on the time axis. In order to explain the time with specific figures, it is artificial to choose a certain moment as the starting point of timing. The starting point of timing is not necessarily the moment when the object begins to move. In physics, the time that the sun passes through the meridian of the observer twice in a row is called a solar day, that is, a day and night. Because the solar days are slightly different, the average of all solar days in a year is taken as the standard of time, which is called an average solar day, or 1 day for short. One day is divided into 24 hours, one hour is divided into 6 minutes, and one minute is divided into 6 seconds, so it is stipulated that one-hundredth of 86,4 days is one second as the time standard. But the seconds specified in this way are not accurate. In 1967, at the 13th International Metrology Conference, it was stipulated that the radiation period between two ultra-fine structure energy levels of ground cesium 133 atom was 919263177 times as one standard second. It is internationally stipulated that the moment of : : Universal Time on January 1, 1958 is taken as the starting point of atomic time. Time often corresponds to displacement or average speed, such as "displacement in five seconds" or "average speed in the first two seconds".

Definition

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In fact, a more comprehensive definition of time can be understood as follows:

Time is the same as the spatial dimension. In the human model of the universe, "time" must be involved to describe the universe.

As we know, the basic logic of the universe model is:

If event B occurs in area A of the space-time coordinate system, event D will inevitably occur in area C of the space-time coordinate system. Obviously, in such a model established by human logic, time is only a dimension used to describe the position of a vector. In our usual understanding, the same is true. But why can humans move around at will in the other three spatial dimensions, but only move forward in the time dimension?

it's just a human brain conflict.

human logic needs four dimensions to explain the universe, but the way for human beings to obtain information can only determine three dimensions. (The human eye can't see through time) Under such conflicts, on the one hand, human beings are explaining four dimensions, on the other hand, they can only determine three dimensions, so that human beings can only feel the passage of the fourth dimension (time) and the changes of the other three dimensions in the fourth dimension. This is the reason why we feel about time now.

however, in fact, in our eyes, the time we "see" in our thinking is not certain. That's because the world is relative, and time is no exception. Ever since Einstein, our great scientist, explored the law of transcending time, human beings began to explore time. I believe everyone has heard of the "theory of light speed and time"-when the speed of human movement is infinitely close to the speed of light, the surrounding time will slow down. There is even a situation that "only one day in the mountains has been in the world for thousands of years". But even so, human beings still face another problem of time-relative time. In the above example, "the world has been a thousand years" is just time for us ordinary people. And the person who is moving at the speed of light still faces "only one day in the mountains" relative to his own time. The so-called "one day in the mountains, a thousand years in the world" is just relative to those of us who exercise at normal speed. Time beyond one's own essence will still be bound by another essential time relative to one's own. Therefore, human beings' exploration of time will never end. Because there will always be relative time in this world, and time will always exist. Beyond the essential time, we will enter a new time rule.

Time theory, essence and factors

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What is time? There are many hypotheses about this problem. In any case, we should use scientific methods to explain time.

1. the principle of equal space-time area; The length in motion system 1 or observation system 1' is the inherent length and time is the inherent time. If the length and time are multiplied, the two space-time coordinate systems are equal.

2. Space-time deflection principle; If the motion system moves relative to the observation system, the relative speed is U or U' at a certain moment, and the motion system and the related system deflect along the relative motion. The deflection angle θ is the time-space deflection angle, and the size of the time-space deflection angle is related to the relative speed, that is, sin θ = U/C. This is the time factor.

The essence of time

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Time is the process of the displacement of the inherent matter in the universe. < p Therefore, it is material.

The length of time refers to man-made progress measurement, so it is conscious.

Interpretation

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① The property of material existence that can be measured by clocks. The occurrence, development and termination of a certain process not only reflect the continuity of the process but also the sequence. The continuity of the process is represented by time interval, and the sequence is represented by date and time.

② the basic form of the existence of moving matter. Time is the continuity, interval and sequence of material movement, and space is the extensiveness and extensibility of material. Time is characterized by one dimension, that is, irreversibility, and space is characterized by three dimensions. Time and space are inseparable from the movement of matter, and there is no time and space without matter and material movement, and there is no matter without time and space. Matter is eternal and absolute, so is space-time as the basic form of matter existence, but the specific manifestations and characteristics of space-time are diverse, changeable and relative.

◎ Note: Academically speaking, time is neither one-dimensional nor irreversible. Time is two-dimensional, just like the plane of a complex number. Time is divided into real axis and imaginary axis. Time is meaningful on the real axis, that is, real time, that is, what we call time: past, present and future. The point on the imaginary axis is just a form of time and a possible situation, which is meaningless to us. Because the existence of virtual time cannot affect us at all. But if one day we can travel in time as Hawking said, we will pass through the imaginary time axis. At that time, it is not difficult for us to understand the imaginary time, and it will have more influence on us.

Explain in more detail

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The time attribute of an object can only exist if and only if the object is in contact with the external body. The time attribute between objects exists because of the synchronization between objects. Every object will affect the time attribute of the object associated with it. They synchronized it.

just like a black hole, time stops because it is separated from the outside world. Although there are foreign objects entering it, they are all synchronized with the black hole because of their strong gravity. Therefore, the time attribute of a black hole is only influenced by itself.

what time is it now? "or" how long is it before the new year? " I'm afraid even primary school students think it's a simple question. But if you reverse the word order and ask, "What is time?" I'm afraid most people will feel at a loss. That's true. "Time" is the most important, common and used concept for us: "Seize the time", "wasting time means wasting life" and "time is money" ...

People regard time as an object that exists independently of anything else and passes away endlessly and evenly; In middle school students' mathematics and physics textbooks, time is expressed as a straight line with a starting point, a unit, a direction and a beginning and an end. This is Newton's "absolute time" which accords with people's common sense, and it is also a scientific time concept that was generally accepted until the beginning of this century.

Truth is relative, and it always develops with the progress of science. Since the 2th century, new achievements and discoveries in physics and astronomy have challenged the basic concept of "absolute time". Albert Einstein's special theory of relativity points out that time cannot exist independently without the observer of the universe and its events, and time is an aspect of the relationship between the universe and its observers. Generally, different observers in relatively uniform motion will always measure different times for the same event. For example, a clock moving at a uniform speed relative to the observer always goes slower than a clock at rest relative to the observer. The greater the relative speed of the clock, the closer it is to the speed of light, and the more obvious the effect. In addition, a direct inference of Albert Einstein's general theory of relativity is that clocks at different heights on the earth's surface travel at different speeds due to the gravitational field. The higher the altitude, the faster the clock speed, with a difference of about 1.9×1-16 seconds/meter (altitude), that is, for every 1 meters, the clock becomes faster by one billionth of a second. These predictions made by Albert Einstein's theory of relativity have been made by the laboratory.