mass mutation

A novel superimposed phase selector aiming at improving the performance of phase selector in the event of a wide range change of power system operation mode is presented.

针对传统电流突变量和电压突变量选相元件不能同时满足强弱电源系统侧保护要求的缺点,提出一种新的突变量选相原理。

In order to overcome the defects in the conventional superimposed distance protection, for instance, the mal-operation resulting from an external earth fault occurring while the transmission system operates at large power angle, a novel self-adaptive superimposed distance protection scheme is proposed.

针对传统突变量距离保护在两侧系统电势相位差较大时发生外部短路等情况有可能误动的缺点,借助同步相量测量技术提供的信息,研究了一种根据系统实时参数自适应调整保护动作门槛的新算法。

A novel fault phase selector by fault component of compensation voltage based on traveling wave is presented for high-speed protection.

为了配合高速保护,提出了一种新型的基于行波理论的相间补偿电压突变量选相元件,利用测量点的方向行波,根据输电线路的分布参数模型,采用行波传播方程计算正方向线路上补偿点的电压,并用该补偿电压构成相间电压突变量选相元件。

The fault component principle is widely used in power system protective relaying since it has lots of advantages.

突变量理论广泛应用于电力系统微机保护。

This method carries on the comparison between the maximal virtual value of current mutational volume which is chosen in the two sides of transmission line,and the virtual value of differential current mutational volume,to distinguish internal fault from external fault.

该原理是选择线路两侧电流突变量的最大有效值与差动电流突变量的有效值进行比较来区分区内、外故障,无需考虑分布电容的影响因素。

Analysis of Characteristics for Impedance Relay in Sudden Change Variable Grounding Direction

突变量接地方向阻抗继电器性能分析

Protection Research for Transformers of the Large Generator-transformer Unit Based on Break-Variable;

基于突变量的大型机组的升压变压器主保护新原理的研究

Comparison and Determination of Anthocyanidins in Anthurium Mutant

红掌突变体花青素含量的测定与比较

Identification of a Novel β Thalassemia Mutation and Development of a Method for High-throughput Mutation Detection of β-globin Gene;

β地中海贫血的新突变鉴定和高通量突变检测方法研究

Changing Characters of Cultivated Land Area and Its Driving Forces in China;

中国耕地数量变化的突变特征及驱动机制

Long-term trend and change point analysis on runoff and sediment fluxes into the sea from the Yellow River during the period of 1950-2007

1950-2007年黄河入海水沙通量变化趋势及突变特征

"a complete, espunexpected, change "

骤变,突变,突然的改变

In a crash, momentum changes abruptly but not instantaneously.

在撞击过程中，动量的变化是突然的，但非瞬时的。

The sudden change in ψ caused by a measurement is called the reduction of the wave function.

由测量引起的ψ的突变叫做波函数的收缩。

Studies on Production Technology and Quality of Recombinant Staphylokinase Variants;

重组葡激酶突变体生产工艺及质量研究

Analysis and Calculation of Sudden External Short-circuit for Powerformer;

能量变换器外部突然短路的分析与计算

The work-to-family conflict occurred to the coaches in institutes of higher learning and its correlative variables;

高校教练员工作与家庭冲突及其相关变量

POTENTIAL RELATIONSHIPS BETWEEN MORPHOLOGICAL DIFFERENTIATION AND MUTANTS WITH HIGH NUCLEASE P1 PRODUCTION OF Penicillium citrinum

桔青霉形态分化与核酸酶P1产量突变关系研究

Distribution and Quantity Changes of Dentritic Cells in Rat Regenerating Liver

树突状细胞在大鼠再生肝中分布及数量变化

Genetic Analysis of Low Amylose Content Trait in Two Oryza indica Mutants

2个低直链淀粉含量籼稻突变体的遗传分析

Mutation Induction by Gamma Rays in Rice: Quality Assurance of Induction Mutants and Studies on Several Important Mutant Traits;

水稻伽玛射线辐射诱变：突变体质量保证与若干重要突变性状的研究

This change is related to the variety of the number, structure and function of synapses in the cerebellum in rats of different ages.

这一变化和不同年龄大鼠小脑突触的数量,结构和功能的变化有关。

Transition entry function could eliminate the conflicts of DWF_net by judging control variables.

变迁入口函数通过判断控制变量,消解工作流描述模型中的冲突;