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The reason of unbalanced load voltage for station transformer in 220 kV substation was analyzed,the important influence of null line wirings in three-phase four-wire system on three-phase load voltage balancing was explained,and put forward a kind of simple,visual and practical vector analysis method.

分析一220kV变电站站用变压器负荷电压不平衡的原因，说明了三相四线制中的零线接线准确与否对负荷三相电压平衡性的重要影响，并提出了一种简单、直观的实用矢量图分析方法。

This thesis studied the phase behavior of some mixed fluids, and the effect of phase behavior on the transesterification of glycerol monostearate with methanol and ethenolysis of ethyl oleate in compressed CO2 was studied.

本论文研究了一些混合流体的气液平衡性质，并着重研究了相行为对超临界CO2中硬脂酸甘油单酯与甲醇酯交换反应和油酸乙酯与乙烯烯烃复分解反应性质的影响。

The experimental studies on the phase drift of digital image are reported,and a detecting method of phase drift based on Harr wavelet transform is presented.

本文详细报导了笔者对数字图像的位相漂移现象所做的实验研究，其中提出了位相漂移的 Harr小波变换探测方法。

Solid-phase extraction technique has become increasingly popular in recent years because it is experienced with several major advantages: the fast, simple and direct sample application in very small size without any sample loss; higher preconcentration factor; rapid phase separation; the ability of combination with different detection techniques in the form of on-line or off-line mode; time and cost saving.

而固相萃取与原子光谱检测技术联用在痕量元素的分离富集和形态分析中也发挥着日益重要的作用。

If the fault is either a single or a double phase to ground one according to the sequence component fault phase selection scheme, another SMMG filter is then employed to process three modular current signals so as to distinguish between them.

用EMTP在一个系统模型上进行了大量的仿真研究，其结果验证了该方案的有效性和易用性，该方法判别灵敏，结果可靠，所提出的算法易于实现，在现有的微机保护装置中可以直接采用。

This phase and the next phase of the project involve open-ended design problems.

这个阶段和下一个阶段的project包含没有固定答案的设计问题。

In this paper, the Maslov theory was introduced. By τ-p transform, seismic data is transformed from space to ,〖WTBX〗 and phase ( p s, p r ,τ) space. Then it is combined with Born inversion, and deduce the high-frequency asymptotic solution of migration operator amplitude in phase domain.

引人Maslov理论，利用τ-p变换将数据从空间分别变换到和及( p s ， p r ，τ)空间中，并将其结合到Born反演中，推导出了相空间偏移算子振幅的高频渐近解。

First, we calculate out the zero point in a simple numeral method, then we get the phase according to the fact that the symbol of phase changed is opposite in the positive-slope and the negative-slope of triangle wave. This method has the following characteristics: easy to calculate, simple to realize and high precision.

首先用简单的数值方法较准确的计算出零点时刻；进而根据三角波扫频时正程和逆程相位变化符号相反的特性，巧妙的完成了相位计算，该方法具有计算简单、实现方便、准确度高等特点。

Phase opposite protection: It is a safeguard acting immediately, which protects L1, L2,L3 three phase against wrong connection sequence.

错相保护：防止L1、L2、L3三相交流电源相序接错的一种保护措施。

Phase opposite protection: It is a safeguard acting immediately, which protects L1, L2, and L3 three phase against wrong connection sequence.

错相保护：防止L1、L2、L3三相交流电源相序接错的一种保护措施。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。