2) system impedance
系统阻抗
1.
For the important characteristic of the source system impedance applied in the power system, a novel method of on-line measurement for the source system impedance is proposed, which utilized the dynamic process of spontaneous short-circuit of the rectifier current transition.
针对电网的系统阻抗参数在电力系统应用中的重要作用,提出一种在线实时电网系统阻抗测量方法。
2.
It considers that the economic and feasible measures that decrease the voltage fluctuation of the bus bar are to reduce the system impedance and reasonably distribute impacting load users.
通过对新余钢铁公司四总降6kV母线电压波动原因进行分析,指出减小系统阻抗及合理分配冲击性负荷用户是降低母线电压波动过大较经济、可行的措施,同时对大容量快速开关的技术特点作了较详细介绍。
3.
Introducing the principle of adaptive instantaneous trip current protection,the discrimination method of short circuit fault type,the real time and on-line calculation method of system impedance,the calculation method of jump-value of current and the protection area of adaptive instantaneous trip current protection respectively.
介绍了自适应电流速断保护的原理,短路故障类型的识别方法,系统阻抗的在线实时计算方法,电流突变量的提取方法及自适应电流速断保护的保护范围。
3) resistance coefficient
阻抗系数
1.
A pipe hydraulic resistance coefficient model for natural gas pipeline network is established based on positive and negative analytic approach.
采用正反分析法建立了天然气管网管段阻抗系数优化反演的数学模型。
4) R-C relation
阻容关系
5) resistance relationship
抗性关系
1.
Using the method of matching design, the resistance to Plasmopara viticola and Sphaceloma ampelinum, as well as resistance relationship were studied with 8 varieties (strain) of Vitis vinifera and a hybrid of V.
利用配对设计方法,田间自然鉴定及室内离体叶圆片接种鉴定,系统地研究了8个欧亚种葡萄品种(系)及1个欧山杂种对葡萄霜霉病及黑痘病的抗性,同时对其中的7个欧亚种葡萄品种对两病的抗性关系进行了研究。
6) the antagonism relationship
拮抗关系
1.
This paper discusses antagonism chemical elements in the organism,cooperation and their reasons on the basis of listing typicol examples,and also summarizes the importance of the antagonism relationship among the chemical elements in the environmental evaluation.
通过实例 ,讨论了生物体内化学元素的拮抗、协同关系及其产生的原因 ,并概述了元素之间拮抗关系在环境评价工作中的重要性 。
补充资料：星接阻抗和三角接阻抗的变换
星接阻抗和三角接阻抗的变换
transformation between starc-onnected and delta-connected impedances
x ing]一e乙日kongl介e sonJ一00}Iez日伙ongde匕一。一〕huon星接阻抗和三角接阻抗的变换(t ransfor-mation betweenstar一eonneeted and delta-eonneeted imPedanees)接成星形的三个阻抗和接成三角形的三个阻抗互相替代的等效变换。它们之间的关系可用一组变换公式表示。按这组公式，用星接阻抗替换三角接阻抗或者反过来，不会影响稳态下电路其他部分的正弦电压和电流，常用于对称三相电路的分析和计算。 图1为三个阻抗21、Z:、23接成星形(又称丫形)。图2为三个阻抗Z小22。、Zal接成三角形(又称△形)。它们之间的变换公式如下:人23土图1星接阻抗图2三角接阻抗(1)将星形连接变换成三角形连接212一Z:+22+2 122及3一22+za十警(1)、|冬|矛231一23+21+2321(2)将三角形连接变换成星形连接z、-二一典乒兴-) 艺‘2士乙“3十乙31…_2 oqZI，}Z。一下万~一二-二二-汁 乙‘2士乙23十乙3‘1_Z。IZoq}艺q一二二一~二，二二--，-二二-~J 乙12十乙23十艺32夕(2) 当三个星接阻抗相等，即21一Z:一23一z丫、三个三角接阻抗相等即212一223一231一Z△时，变换公式是 Z二一32丫，Z丫一Z△/3
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条