1) waveform symmetry
波形对称
1.
Differential protection based on waveform symmetry is furtherly studied and analyzed through a mal-operation incident when the unloaded power transformer is connected to the power system.
通过变压器空载合闸时差动保护误动事故的分析,对波形对称原理识别励磁涌流的能力作了进一步的分析和研究。
2.
In consideration of the frequent mal-operation of transformer differential protection based on the principle of waveform symmetry, this paper analyzes the internal relationship of the waveform symmetry principle and the secondary harmonic restraint principle based on the generating mechanism of the magnetic inrush current of the three-phase transformer.
针对近期基于波形对称原理的变压器差动保护频繁误动的现状,从三相变压器励磁涌流的产生机理入手,分析了波形对称原理与2次谐波制动原理的内在联系,结合目前流行的2种相位补偿方式,指出了传统采用相间差动的保护方案误动的根本原因。
3.
In connection with analyzing operation of two differential protections for transformer, The criterias for exciting current of differential protection were compared,and further explanation for the principle of waveform symmetry.
结合两起主变差动保护动作情况 ,对变压器差动保护鉴别励磁涌流的判据进行比较 ,并对波形对称原理的应用进行了探
2) symmetry degree of waveform
波形对称度
4) wave asymmetry
波形不对称性
1.
The breaking wave characteristics on different slopes with various bottom friction coefficients are analyzed,and the critical slopes influenced by bottom friction coefficients and the effects of wave asymmetry on breaker indices are analyzed in detail.
重点分析了规则波破碎时海底坡度、底摩阻系数及波形不对称性对破碎指标的影响。
2.
The most representative methods of wave breaking indices are proposed by Goda and Nelson, but both of them can not reflect the influence of the bottom friction factors and the wave asymmetry on the breaking indices.
已有的研究中最具代表性的是合田良实和澳大利亚Nelson所提出的方法,但合田公式与Nelson公式均未反映底摩阻系数及波形不对称性对破碎指标的影响。
5) symmetric laser pulse
中心对称波形
6) wave symmetry improvement
波形对称度改造
补充资料：对称与非对称
反映客观事物在结构、功能、时空上的特殊联系的范畴。对称指事物以一定的中介进行某种变化时出现的不变性，非对称指事物以一定的中介进行某种变化时出现的可变性。在自然界中普遍存在，形式多样。对称有空间对称(包括形象对称和结构对称)、时间对称、概念对称等。
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