搜索筛选:
搜索耗时4.0914秒,为你在为你在102,285,761篇论文里面共找到 7 篇相符的论文内容
类      型:
[期刊论文] 作者:Zhaoyin WANG,Shimin TIAN,Yujun, 来源:国际泥沙研究:英文版 年份:2007
River regulation and river training have been performed for various purposes and negative effects have been shown in numerous cases. In some cases the negative...
[期刊论文] 作者:Tian Yujun,Li Xiubin,Ma Guoxia, 来源:中国人口.资源与环境:英文版 年份:2011
Nowadays the rising of opportunity cost of farm labor comes to the forefront of attention in China. In order to understand its impact on agricultural land-use s...
[期刊论文] 作者:Fang Tian,Yujun Wang,Hardev S., 来源:林业研究:英文版 年份:2020
Ginkgo biloba L. is a precious relic tree species with important economic value. Seeds, as a vital reproductive organ of plants, can be used to distinguish cult...
[期刊论文] 作者:CHEN Yuqi,LI Xiubin,TIAN Yujun, 来源:地理学报:英文版 年份:2009
从农场的本利的数据基于数据生产并且中国农业年鉴,这篇论文划分了紧张栽培了陆地使用进劳动紧张和大写的紧张,然后在 bo 分析了他们的时间、空间的变化...
[期刊论文] 作者:Zhaoyin WANG,Shimin TIAN,Yujun YI,Guoan YU, 来源:城市道桥与防洪 年份:2007
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥...
[期刊论文] 作者:Fang Tian,Yujun Wang,Hardev S. Sandhu,Johan Gielis,Peijian Shi, 来源:林业研究(英文版) 年份:2020
Ginkgo biloba L. is a precious relic tree species with important economic value. Seeds, as a vital repro-ductive organ of plants, can be used to distinguish cul...
[期刊论文] 作者:Zuyuan Xu,Haiqing Zhang,Xiangjun Tian,JIA Ji,Wei Li,Yan Li,Wei Tian,Yujun Han,Lili Wang,Zizhang Zhang, 来源:黑龙江科技信息 年份:2003
鸡西矿业集团公司张辰煤矿西三采区3...
相关搜索: