PQD

Aimed at power quality disturbance ( PQD), several transformation-based analysis methods are introduced. By comparing those methods, a method is brought forward based on the wavelet packet ( WP) energy chart.

针对电能质量扰动问题，通过介绍几种基于变换理论的电能质量扰动检测和分类方法，对比分析各种方法之利弊，提出了基于小波包能量谱的电能质量短期扰动检测与分类新方法。

A new classification method for power quality disturbance ( PQD) based on singular value ( SV) feature vectors of S-transform ( ST) time-frequency matrixes ( TFM) has been proposed.

提出了一种基于S变换时频矩阵奇异值特征向量的电能质量扰动分类方法。

In the present paper, we obtain stability of sums of weighted for pairwise PQD sequences and pairwise NQD sequences.

本文讨论了两两PQD列及两两NQD列两类相关列的加权和的稳定性。

As an example of the application of PQD the design of SE was introduced.

结合热气机样机的开发设计,介绍了产品质量设计方法的具体应用.

Amplitude deviation ( AD) and phase deviation ( PD) are the important compositions of power quality disturbance ( PQD).

幅度变化（AD）与相位变化（PD）是电能质量扰动的重要组成部分。

Objective To observe the mechanism of action panax quinquefolium diolsaponins ( PQDS ) on anti-ventricular remodeling in rats.

目的:观察西洋参叶二醇组皂苷 ( PQDS ) 对抗大鼠心室重构的作用机制.

Online monitoring of Power Quality disturbances ( PQD) is a direct and effective way to obtain PQ information, and it has become a hot research subject in IEC technical fields.

电能质量扰动在线监测是获取电能质量信息的直接有效途径，其方法研究业已成为电工技术领域的热门前沿研究课题。

Investigating the levels of lipid peroxidase ( LPO) and superoxide dismutase ( SOD) in serum, bronchoalveolar lavage fluid ( BALF) and alveolar macrophage ( AM) were determined in 40 chronic bronchitis patients with Pulmonary Qi Deficiency ( PQD) Syndrome and 36 normal subjects.

检测40例慢性支气管炎肺气虚证患者及36名健康人外周血、支气管肺灌洗液（BALF）中超氧化物歧化酶（SOD）、过氧化脂质（LPO）以及肺泡巨噬细胞（AM）内SOD含量。

The proposed algorithm is simple and suitable for programming with low computational load, and case study shows that it locates the PQD sources automatically and accurately.

算例分析表明，该算法不仅可实现配电网络中电能质量扰动源的自动、精确定位，而且具有简洁直观、计算量小、适于计算机编程实现等优点。