When conducting trade off studies of engineering systems, when it is appropriate to use the utility

It is necessary to ensure that the evaluation has a certain degree of objectivity.

It is necessary to ensure the comparability of the schemes.

Evaluation indicators should be systematic.

Evaluate quasi-rules and utility functions.

In a multi-objective system, different goals are measured by different criteria. If the degree of agreement of an alternative for the overall objective is to be assessed, it is necessary to formalize the above-mentioned criteria, expressed in various units of measurement, into a uniform quantitative scale or measure.

To build a tank farm along the beach, according to the systems engineering method, it is necessary to find out the system connections and key points. The key point of this project is the foundation treatment, which generally adopts the overall static pressure and piling local treatment, and the treatment method should be jointly determined according to the geological survey results and the actual use function, which is the problem of comprehensive consideration of the system.

Generally speaking, it is the analysis and comparison of the content to be demonstrated, in multiple ways and multiple schemes, and the best argumentation results are determined from them. The process of comparing the analytical solutions of multiple channels and schemes is also the process of trade-offs.

Broadly speaking, decision-making is a phenomenon unique to human society.

Secretarial Basics" "First Diagnosis" mock test questions (80 points in total).

1. Fill-in-the-blank questions (1 point for each question, 10 points in total).

1. Decision-making is a phenomenon unique to human society, a link in the two-way cycle of human behavior system, and a conscious activity and its results that individuals or groups carry out and decide to change the environment.

It must be c, it needs to be said.

Modulation is a technology that injects a signal into the carrier wave and modulates the carrier with this signal, so as to convert the original signal into a radio wave signal suitable for transmission, which is often used in radio wave broadcasting and communication, data communication using ** line and other aspects. According to the different modulation signals, it can be divided into digital modulation and analogue modulation, which are not the same modulation, but are different.

Analog communication, the technology is very mature, that is, the analog signal and the carrier are modulated, so that it has certain carrier characteristics, without losing the uniqueness of the analog signal, and the receiving end restores the initial analog signal through a low-pass filter. For digital signals, the sampling amplitude is encoded (0, 1 coding), and then modulated, phase-shifted keying, etc., and the receiving end can be restored, and the signal transmission rate is high. Comparatively, digital communication is superior to analog communication.