序

The formulation of OYOD transformer s phase sequence adjustment is a combinatorial optimization problem with non-linear and non-differential objective function.

针对OYOD变压器相序调整是一个组合非线性及不能微分目标函数的最优化问题，提出用蚁群算法来求解OYOD变压器的相序调整问题，以提高负载平衡能力，同时提出一种变信息素挥发系数的方法以提高算法解的质量和收敛速度。

To deal with this problem,a solution integrating two PWM rectifiers by parallel connection was presented.

推导正、负序电流与电网正、负序电压及直流功率的关系，并设计出控制系统。

The similarity degree is defined by utilizing similarity relations; the dominated index and the dominating index of each alternative are calculated respectively, the two complete preorders of alternatives are worked out; the two complete preorders are then combined into a final partial order of alternatives.

该方法运用相似关系确定出相似度，建立了最大控制指标和最小被控制指标模型。通过模型的计算，得出方案集的两个全预序排列，然后将这两个全预序排列合并成方案集的最后排序。

Increasing convex order is one of important stochastic orderings. It is very often used in queueing theory, reliability, operations research and economics.

增凸序是一种重要的随机序，它广泛的应用于排队论、可靠性、运筹学和经济学之中。

In this paper, a self-adaptive selecting algorithm proposed is based on a fast and effective measure for evaluating variable ordering, to select the "best" ordering among a group of orderings.

首先将OBDD变量排序问题分解为3个子问题，定义了若干启发信息，给出了上述子问题的启发式解法；然后提出了一个变量排序自适应选择算法，从若干候选变量序中选出&最佳&的变量序。

Methods Firstly, total DNA in the root tuber of P. multiflorum from various habitats was extracted. Secondly, the ITS sequence was amplified by PCR with universal primer of ITS and sequenced after purification.

从来自不同原产地的何首乌中提取总DNA，以核基因组ITS通用引物为引物进行扩增，扩增产物经纯化后，用PCR产物直接测序法进行测序。

It is found that comparing with compact single circuit transmission mode, T-type compact transmission mode of two circuits on the same tower and conventional transmission mode of two circuits on the same tower, the transmission mode of two circuits with same phase sequence in the same tower window need narrower corridror width, and the radio interference and audible noise caused by this transmisison mode is relatively lower, especially, the corona loss is reduced evidently, thus better economic and social effects can be obtianed by applying this transmission mode in a short distance under a centain condition.

从走廊宽度、电磁环境、潜供电流和防雷特性4个方面对750 kV同塔同窗同相序紧凑型输电方式进行了分析，发现与单回紧凑型、同塔双回T型紧凑型及同塔双回常规型输电方式相比，采用同塔同窗同相序紧凑型输电方式所需的走廊较小，无线电干扰和可听噪声相对较低，尤其是电晕损失明显减小，采用这种方式在一定条件下可获得较好的经济效益与社会效益。

In order to be fit for three-phase four-wire system, the method of balancing control using chopper presented in literature [29] is mended. The new standpoint that ip-iq detecting method based on three-phase three-wire system can be directly used in three-phase four-wire system is presented and proved.

分析了零序和负序电流对新型UPFC直流侧电容电压的不同影响，对文献[29]提出的传统UPFC的直流侧各电容电压的均衡控制方法进行了仔细研究，提出了采用B型直流斩波器来控制新型UPFC的直流侧电容电压的新方法。

Firstly, harmonic detection method using ip,iq algorithm, which is based on the instantaneous power theory proposed by H.Akagi, is introduced briefly and is extended to detect positive or negative sequence of arbitrary order harmonic in single-phase system, three-phase three-wire system or three-phase four-wire system.

首先，本文简要介绍了基于瞬时功率理论的谐波电流检测方法——i_p，i_q算法，并将之推广应用于单相系统、三相三线制系统和三相四线制系统中任意次数谐波的正序、负序有功、无功分量的检测，大大拓宽了该优良瞬时谐波检测算法的应用范围。

In this paper the trends in the study on the coherent structure of turbulent shear flows are discussed with a brief review of the achievements in this area during the last thirty years.

本文在简要地回顾了30多年来湍流拟序结构研究的进展之后，评述了目前拟序结构研究的动态。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。