邹平县测量标志普查工作的主要做法及经验

测量标志是测绘工作的重要成果，是测绘工作与其他经济建设工作必不可少而且需要长期使用的基础设施，是国家的宝贵财富。测量标志在国民经济建设，国防建设和科学研究中发挥着重要作用。为全面摸清全县行政辖区内测量标志的保存现状，为测量标志保护工作提供基础资料。2007年，邹平县国土资源局对辖区内的测量标志进行了全面普查。     

The Loess/Paleosol record and the nature of the younger Dryas climate in central China

The use of latest Pleistocene-Holocene paleosols in defining Chinese climatic sequences is plagued by poor chronological controls caused primarily by the use of radiocarbon dates derived from bulk soil carbon. Dating of a post-glacial aeolian/paleosol sequence in the Pigeon Mountain basin of north-central China, using culturally deposited charcoal, support a wide array of other data suggesting the Younger Dryas was a period of cooler dryer conditions marked by wide-spread aeolian deposition. Periods of soil formation and higher lake levels bracket this climatic event. Climatic variability immediately before, during and immediately after the Younger Dryas interval is associated with rapid technological elaboration and innovation in the production and use of chipped stone tools, and perhaps, ground stone. © 1998 John Wiley & Sons, Inc.     

Mechanical and biodeterioration behaviours of a clayey soil strengthened with combined carrageenan and casein

Acta Geotechnica - In the last decade, biopolymers have been used as organic soil binders in ground improvement and earthen construction material modification. Although biopolymer-treated soils...     

a-Si:H/c-Si 异质结太阳电池 J-V 曲线的 S-Shape 现象

通过异质结界面分析与 AMPS 模拟计算研究了 a-Si:H/c-Si 异质结太阳电池在低温工作、a-Si:H 层低掺杂、高价带补偿以及高界面态时光态 J-V 曲线出现 S-Shape 现象的物理过程,总结了 S-Shape 现象的物理原因.分析结果表明,当空穴输运受到界面势垒的限制时,空穴在 c-Si 界面附近聚集,能带重新分配,c-Si 耗尽区的电场减小,更多的电子从 c-Si 准中性区反转至 c-Si 界面及耗尽区与空穴复合,复合速率显著增大,光电流的损失显著增大,光态 J-V<     

船舶磁防护与电场防护耦合性分析

根据船舶电磁场综合防护需求,对磁场防护和电场防护的耦合性进行了研究,总结了 11 种电磁场产生来源,分析了不同电磁场源产生的磁场和电场的耦合关系。 基于磁场和电场耦合性分析数学模型, 仿真分析了磁场和电场耦合特性,指出了需结合多种控制措施实现船舶磁场和电场的综合防护。