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[期刊论文] 作者：Weihua Zhang,Chenggang Zhao,
来源：固体力学学报（英文版） 年份：2004
This paper aims at establishing an anisotropic stress expression for unsaturated pendular-state granular soils.Using the second-order fabric tensor,we formulate...
[期刊论文] 作者：Zhang Chenggang,Yang Weiguo,,
来源：China Population Today 年份：2004
With increasingly freed labor markets, China's level of occupational gender segmentation is changing under the impacts of market mechanism and female human capi...
Correlations between the ages of Alnus host species and the genetic diversity of associated endosymb
[期刊论文] 作者：Dai yumei,Zhang Chenggang,Xion,
来源：中国科学C辑（英文版） 年份：2004
Nodule samples were collected from four alder species: Alnus nepalensis, A. sibirica, A. tinctoria and A. mandshurica growing in different environments on Gaoli...
[期刊论文] 作者：He Fuchu,Zhang Chenggang,Li Yo,
来源：黑龙江科技学院学报 年份：2004
The aim of this study is to discover the molecular mechanism of the 22-week gestated human fetal liver( HFL ) which rarely displays both hematopoietic and hepat...
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