HS code-based transport cost modeling

List of the table of contents of this article:

• 1, What does the signal system include?
• 2、 What is a signal and system?
• 3, What is the difference between the first signal system and the second signal system?

What does the signal system include?

Composition of the basic system: It is generally composed of signal source (sending device), signal destination (receiving device) and channel (transmission medium), etc., which are called the three elements of communication.

This system includes turn signals, width indicator lights, emergency lights, reversing lights, reversing prompts, parking lights, brake lights, horns, etc.

The railway signal system includes: station interlock, interval occlusion, train operation control, driving dispatch command control, hump transfer control, microcomputer monitoring, crossing signal and other systems.

The high-speed rail signal system is composed of dispatch centralized control system (CTC), column control system (CTCS-3 level), station interlock system (CBI), signal centralized monitoring system (CSM), power supply system, etc.

What is a signal and system?

1. Signal theory includes: signal analysis, signal transmission, signal processing and signal synthesis; system theory includes: system analysis and system synthesis.

2. In the theory of digital signal processing, people call the entity that can process and transform digital signals as a system.

3. A signal is a function of a single or multiple independent variables, and generally contains information about the process and characteristics of a phenomenon, while the system generates other signals in response to a specific signal.

4. Signal and system: basic knowledge of signal and system; time domain analysis of continuous signal and system; transformation domain analysis of signal and system; time domain analysis of discrete signal and system; system function; state variable analysis of signal and system.

5. Signals and Systems mainly deals with the time domain and frequency domain analysis of signals. The main contents include: the basic concepts of signals and systems; time-domain analysis, frequency-domain analysis and complex-frequency domain analysis of continuous signals and systems; time-domain analysis and z-domain analysis of discrete signals and systems; state variable analysis of systems, etc.

6. The signal and system course is an important basic course for electronic information and other majors. It is based on higher mathematics, linear algebra, basics of circuit analysis and other courses. It is also the basis for the follow-up study of communication system principles, digital signal processing and random signal processing and other professional courses. It has the ability to carry forward and start from the future. The function of.

What is the difference between the first signal system and the second signal system?

1. Different conditions: the first signal system Any physical conditional stimulus that can cause a conditional reaction is called the first signal system, which is shared by animals and humans. The second signal system. Any language-mediated conditional stimulus that can cause a conditional response is called a second signal system, which is unique to human beings.

2. The difference between the first signal system and the second signal system is mainly reflected in the transmission mode and technology of the signal. The first signal system refers to a system that uses analog signals for communication. In the first signal system, information such as sound, image or data is converted into continuous analog signals and transmitted and processed through analog circuits.

3. The first signal system is reflection. The second signal system is thinking. From the analysis of traditional psychology theory, it is a feeling generated by seeing the deceleration sign, which belongs to the first signal system. The subsequent perception is "requires to slow down", which belongs to the second signal system. Pavlov School of Physiology Special Terms.