Petroleum Pollution of Water Environment in Urban of Yanping Lake and Its Control;

This article analyses the three development stages of clothing industries in Pinghu, then construes some economic phenomena in the development of Pinghu's clothing industries with economics theories, finally summarizes the enlightenment from the experience of Pinghu's clothing industry development and conclusion of blocking development of open and clusters economy.

The study area, Pinghu of Zhejiang Province, lies in the Yangtze River delta plain.

The generators as commutators of transvections in the special linear group over shewfields;

Let A and B be two transvections,with a P∈GL_n(F),satisfing P~(-1)AP=T_(12)(1),P~(-1)BP can be denoted with five simple forms if A and B are not commutative.

A matrix Ain GL_n(F)is called a transvection if A is similar to T_(12)(1) whose elements on(1,2)-position and principal diagonal are all 1 and 0 else.

The origin of carbonate cements and the influence on reservoir quality of Pinghu Formation in Xihu Sag,East China Sea;

The distribution and exploration implications of coal beds of Pinghu Formation,Paleologene in Xihu Sag;

Sedimentary Environment of Pinghu Formation in Sudi Division,Xihu Ssg, the East China Sea;