问题 问答题 简答题

在站场PID调节中,比例常数、积分常数、微分常数、时间常数(周期)间的关系是什么?

答案

参考答案:

在场站PID调节中,比例常数、积分常数、微分常数、时间常数(周期)间的关系是:

(1)比例常数控制调节曲线上升的陡峭程度,值越大坡度越大;

(2)积分常数控制曲线的波动程度,积分常数越大其波动越小;

(3)微分常数越大,控制点实时变化时,输出的响应越大;

(4)时间常数(时期)控制了PID调时的速度,同时反作用于积分常数、微分常数。

解答题
单项选择题

Starting with his review of Skinner’s Verbal Behavior, Noam Chomsky had led the psycholinguists who argue that man has developed an innate (天生的) capacity for dealing with the linguistic universals common to all languages. Experience and learning then provide only information about the (1) instances of those universal aspects of language which are needed to communicate with other people within a particular language (2) .

This linguistic approach (3) the view that language is built upon learned associations between words. What is learned is not strings of words per se (本身), but (4) rules that enable a speaker to (5) an infinite variety of novel sentences. (6) single words are learned as concepts: they do not stand in a one-to-one (7) with the particular thing signified, but (8) all members of a general class.

This view of the innate aspect of language learning is at first not readily (9) into existing psychological frameworks and (10) a challenge that has stimulated much thought and new research directions. Chomsky argues that a precondition for language development is the existence of certain principles "intrinsic (原有的) to the mind" that provide invariant structures (11) perceiving, learning and thinking. Language (12) all of these processes; thus its study (13) our theories of knowledge in general.

Basic to this model of language is the notion that a child’s learning of language is a kind of theory (14) . It’s thought to be accomplished (15) explicit instruction, (16) of intelligence level, at an early age when he is not capable of other complex (17) or motor achievements, and with relatively little reliable data to go on. (18) , the child constructs a theory of an ideal language which has broad (19) power. Chomsky argues that all children could not develop the same basic theory (20) it not for the innate existence of properties of mental organization which limit the possible properties of languages.

8()

A.symbolize

B.embody

C.depict

D.represent