序

Consideration of the structural characteristics of autotransformer, the principles and characteristics of zero-sequence differential protection are analyzed by taking PST1200 as an example, debugging method of zero-sequence differential protection is summed up briefly, the method can well verify the logical function correctness of zero-sequence differential protection, and it has been verified in practical application.

结合自耦变压器的结构特点，以南自PST1200变压器保护装置为例分析了零序差动的原理构成及特点，简要总结了零差保护的调试方法，能够较快且准确的校验零差保护逻辑功能的正确性，并已在实际工作中得到了很好的验证

In this paper the reason of rapid increase of single phase short circuit current in 500 kV substation is analyzed. Through the calculation it is proved that neutral grounding by small reactance is an effective measure to reduce the single phase short circuit current, and the calculation method of the zero\|sequence reactance after autotransformer neutral grounding by small reactance being applied is expounded.

文中研究了500kV变电站单相短路电流急剧增长的原因，计算了变压器中性点经小电抗接地对限制单相短路电流的作用，论证了经小电抗接地是限制单相短路电流的有效措施之一，并阐述了500kV自耦变压器中性点经小电抗接地后，其等值零序电抗的计算方法，可供工程参考。

Four positive clones were obtained by the selection of autotrophic phenotype and β-galactosidase assay.

利用营养缺陷型和β—半乳糖苷酶活性筛选到4个阳性克隆，测序结果表明它们具有相同的序列。

Put forward using axial symmetry model to calculate zero-sequence impedance of power transformer. The results comparing with the testing value are correct.

提出使用准三维轴对称物理模型计算变压器的零序阻抗，并用实际模型和实验数据验证了计算结果，其结果是合理的。

The problem then becomes constructing such an ordering, and it turns out that every set can be well-ordered if and only if the axiom of choice is true.

问题就变成构造这样一个排序，而它使得所有集合可以是良序的，当且仅当选择公理为真。

Every strictly decreasing sequence of elements of the set must terminate after only finitely many steps (assuming the axiom of dependent choice).

注意这个第三点：对于一个良序集，任何严格递减序列都必然是有限的，无论这个集合的基数有多大。

In Section 4, we establish the dependence axioms of poset matroids, which is one of our main results in this thesis.

第4节建立了偏序集拟阵的相关性公理，这是本文的主要结论之一。

In Section 6, we set up the closure axioms of poset matroids. which is one of our main results in this thesis.

在第6节，我们建立了偏序集拟阵的闭包公理，这是本文主要定理之一。

Azole resistance was found in the candida albicans isolate from the renal transplant recipients, and there is no connection between incidence of resistance and isolate locus.

通过PCR扩增该基因上游启动子调控序列，转化质粒扩增后测序未找到耐药/敏感菌株在调控序列上的任何点突变。

Ravel also sequenced the genome of a Bacillus subtilis strain that was found in one of the letters.

瑞福对于在其中一封信中发现的枯草芽孢杆菌也进行了测序。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新