一、数字控制系统 采样过程 1.定义:数字控制系统是一种以数字计算机为控制器去控制具有连续工作状态的被控对象的闭环控制系统。 2.组成 (1).框图rad数字计算机d保持器m被控

高血压是以体循环动脉血压增高为主要表 现的临床综合征。可分为原发性和继发性两大 类。其中原因不明的称之为原发性高血压,即 高血压病。 目前我国仍然采用1999WHO/ISH的标准。 具体如下:

一、数组操作函数 二、数组构技法综合 三、高维数组 四、“非数”和“空”数组 五、关系操作和逻辑操作

为了充分利用我国含砷铁矿资源,采用精炼渣+不同Ca合金对钢液进行脱砷研究,获得较高的脱砷率,其中Si-CaBa合金综合脱砷效果最佳.在相同操作条件下,通过改变实验条件,对钢液中砷含量随时间变化规律以及对脱砷效果的影响进行研究,并对高砷含量下不同Ca合金加入钢液后Ca的有效利用率进行详细分析

Useful Information Advantage of reading books. The old saying: \To open a book is always helpful.\clearly shows us how good it is to read a book. Reading is a good thing, but we must pay great attention t the choice of books. It's true that we can derive benefits from good books. As a matter of fact, books

Background Knowledge u Time Zones and International date Line rn 1884 scientists divided the world into 24 time zones. The time in the zone containing greenwich is called Greenwich Mean Time Going westwards around the world from Greenwich, we subtract an hour for each

Nuclear power 1 Nuclear power can come from the fission of uranium plutonium or thorium or the fusion of hydrogen into helium. Today it is almost all uranium. The fission of an atom of uranium produces 10 million times the energy produced by the combustion of an atom of carbon from coal. By 1993, there'd been 109 licensed

Background knowledge The English Channel: commonly called the Channel is an arm of the Atlantic Ocean separating the southern coast of England from the northern coast of france, and connecting the Atlantic in the west with the north Sea on the east via the strait of dover

景观设计学是近年来国内刚刚兴起,逐渐形成的一门学科和技术。与其相近的专业词 语有“园艺”,“景观建筑”,“造园”等概念,但景观设计的范畴不仅包括了以上内容,还 涵盖着更为广阔的内容,是一门综合性较高的设计艺术。 在当前资源缺乏,环境问题突出的背景下,人们提出了可持续发展的观点,并在各个 专业领域得到了迅速的扩散和极大的响应

Background knowledge Four steps one has to go through in looking for a job: a. Look for a post in newspapers, on TV, etc. b. Write a formal application to the target company and follow up with a call C. Get an answer from the company d. Be interviewed by the company