Various approaches have been used to improve the performance of adapted indigenous stock, including cross-breeding and upgrading through back-crossing with improved breeds, and within-line selection.
已有多种方法被用于提高地方良种的性能，包括杂交育种，以及通过与良种的回交和品系内选育进行的品种改良。
The phase comparison between fault feeder and healthy feeder is one of important criteria in fault line selection for neutral non-effective grounding systems.
小电流接地系统发生单相接地故障时，故障线路与健全线路在特征频段内零序电流的相位差别是接地选线判据的重要依据之一。
In the distribution network with an arc suppressing coil, quick line selection technology is very important.
在有消弧线圈的配电网中，快速选线技术是一项关键技术。
The traditional line selection and cross breeding is one of the most effective ways to cultivate improved varieties.
传统的家系选择和杂交育种是培育优良品种最有效的方法之一。
Then the idea of integral control of automatic resonance and single-phase earth faulted line selection was put forward.
并在此基础上给出了补偿电网中消弧线圈自动调谐与单相接地故障选线一体化的综合控制思路。
The new arc suppression coil control system consists of line selection device and automatic tuning device which communicate by CAN bus.
新型消弧线圈控制系统采用选线装置和调谐装置两套装置共同组成，两套装置通过CAN 总线进行通信。
The protection for earth fault line selection and fault point location by S injecting current in neutral isolated power system is presented.
介绍了基于“S注入法”的小电流接地系统单相接地故障选线定位保护。
According to the researching situation of fault line selection in distribution networks, a novel algorithm of transient line selection is proposed.
针对配电网故障选线的研究现状，提出了一种暂态选线新算法。
It is differ both from the method of "circulate line selection" for seed reproduction and from the method of "pure line breeding" for varieties development.
该方法既区别于单纯生产原种的“株系循环法”，也区别于选育新品种的纯系育种法。
Some existing theories schemes on the fault line selection have been summarized and analyzed systematically in this paper. In the end, a conclusion is given.
本文系统地归纳和分析了现有的各种选线原理和方案，并给出了结论。
A series of TY protections based on the s's signal injection method have been widely applied to fault line selection and fault location in power systems in China.
基于“S注入法”的选线定位保护新原理的TY系列选线定位保护已大量运行于国内电力系统。
This paper gives a general overview of various neutral grounding modes. Some existing theories schemes on the fault line selection have been summarized systematically.
配电网中性点采用小电流接地在世界范围内是一种较流行的接地方式，并在我国配电网中得到了广泛应用。
This method has excellent performance by contrast with decaying DC component based line selection method and wavelet pocket transient energy based line selection method.
与衰减直流选线法和小波包暂态能量法做了对比，突出了本算法的优越性。
Controllable saturated reactor is widely used in dynamic reactive power compensation, induction motor soft-starting and fault line selection of small current grounding system.
可控饱和电抗器在动态无功补偿、电机软启动、小电流接地选线等方面具有广阔的应用前景。
An incorporate device of automatic arc-suppression coil and grounding fault line selection based on modularity structure was developed to improve its reliability and flexibility.
为提高可靠性和使用的灵活性，开发了一种模块化结构的自动消弧线圈及接地选线成套装置，给出了二者的硬件设计和接地故障子程序设计。
The grounding line selector SL-11 has passed field tests of single-phase-grounding line selection in non-solidly grounding system, which is based on current transient traveling wave.
将基于暂态行波的接地选线技术应用于现场，实现了基于电流行波的配电系统故障选线装置SL-11，并在现场对装置进行了多次试验。
The average correlation coefficient is calculated to remove the errors caused by asynchronous sampling and the faulty line selection list is sorted according to the fault probability of line.
通过求取相关系数平均值，避免数据采集不同步引起的计算误差，得到按照发生线路故障可能性大小排列的故障选线序列。
On account of the weak fault current and unstable fault arc, the problems of the single phase to ground fault line selection in the non-solid earthed network have never been thoroughly resolved.
由于故障电流小、电弧不稳定等原因，小电流接地系统单相故障选线问题始终没有得到彻底解决。
Dynamic model experiments better testify the correctness and practicability of line-selection schemes.
动模实验结果验证了选线方案的正确性和实用性。
Dynamic model experiments better testify the correctness and practicability of line-selection schemes.
动模实验结果验证了选线方案的正确性和实用性。
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