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Micromorphological-investigation on the Earth's Critical Zone

Soils, the Earth＇s Critical Zone, play a vital and fundamental role in the Earth＇s terrain eco- environment system and human life. Although the concepts of soil/quality and sustainable development have been introduced for decades, we are still failing to understand how well soils function and they need tobe cared and protected. We have been increasingly witnessing and becoming the victim of shrinking forests,     

Inheritance Pattern of Microsatellite Loci and Their Use for Kinship Analysis in the Japanese Scallop Patinopecten yessoensis

The inheritance mode of seven microsatellite markers was investigated in Patinopecten yessoensis larvae from four con-trolled crosses,and the feasibility of using these markers for kinship estimation was also examined. All the seven microsatellite loci were compatible with Mendelian inheritance. Neither sex-linked barriers to transmission nor major barriers to fertilization between gametes from the parents were evident. Two of the seven loci showed the presence of null alleles in two families,suggesting the...     

数据中心集成开发技术:新一代GIS架构技术与开发模式

解决分布式异构多源空间数据共享、不同厂家的功能共享和合作开发是当前GIS开发和应用领域的难题.提出了数据中心集成开发模型框架, 并基于该框架提出了新一代GIS架构技术和开发模式, 介绍了数据中心的核心技术——数据仓库技术、功能仓库技术、搭建与配置技术等, 同时给出了国土数据中心的应用实例, 为基于数据中心大型信息化系统解决方案的实现提供了一种新的模型.      

Cu在TaN(111)表面团聚行为的分子动力学模拟

原子层沉积(ALD) 是下一代超大规模集成电路的首选工艺, 但是Cu籽晶层在阻挡层上的团聚限制了ALD工艺在半导体工业中的应用.目前对Cu在阻挡层TaN表面的团聚机理和行为还缺乏足够的理论认识, 为此利用第一性原理密度泛函理论(DFT) 对不同覆盖度下Cu原子在TaN (111) 表面的吸附能和电荷转移进行了研究, 结果显示, Cu在TaN (111) 表面的吸附强度随着Cu覆盖度的增加而减弱.利用从头算分子动力学模拟了500K温度下Cu单分子层在TaN (111) 表面的吸附动力学行为, 结果表明, 在这一典型的ALD温度下, Cu层在TaN (111) 表面发生团聚, 与实验中的观察结果相符.      

铁矿床中黑柱石富集特例剖析

黑柱石是一种少见的含钙铁硅酸盐矿物。通过富含黑柱石的青海省双庆铁矿区与仅含少量黑柱石的福建省马坑铁矿区矿床地质特征的对比,认为矿床中黑柱石的产生与中基性火成岩的参与有关;黑柱石的解体与硼的参与有关。     

Probability-consistent spectrum and code spectrum

IntroductionInChina,thecombinationofseismicdesigncodewithzoningmapofseismicintensityorgroundmotionparametersisusuallyadoptedtodeterminetheseismicfortificationcriterionforthegeneralindustryandcivilbuildings.Thepresentproceduresareasfollows.Accordingtothepro-jectlocation,thedesignbasicaccelerationofgroundmotionandthedesigncharacteristicperiodofresponsespectrumareobtainedfromthezoningmapofseismicgroundmotionparameters(GeneralAdministrationofQualitySupervision,InspectionandQuarantineofthePeople…     

安徽淮南群四顶山组燧石Sm-Nd年龄测定

在对苏皖北部的上前寒武系进行了矿物学研究基础上,选择安徽北部淮南群四顶山组燧石作为测定对象,系统测试Rb-Sr和Sm-Nd同位素,应用Sm-Nd等时线方法进行了定年。本次研究表明,安徽淮南群四顶山组燧石可能是在海洋环境中形成,主要反映了陆源物质特征,其形成时代约为800Ma。这为苏皖北部地区上前寒武系是位于华北区青白口系和扬子区震旦系之间的一套地层提供了一个新的证据,也进一步印证了淮南生物群属于先伊迪卡拉期的学术观点。     

Two-fluid Dynamics in Clusters of Galaxies

We develop a theoretical formulation for the large-scale dynamics of galaxy clusters involving two spherical ‘isothermal fluids‘ coupled by their mutual gravity and derive asymptotic similarity solutions analytically. One of the fluids roughly approximates the massive dark matter halo, while the other describes the hot gas, the relatively small mass contribution from the galaxies being subsumed in the gas. By properly choosing the self-similar variables, it is possible to consistently transform the set of time-dependent two-fluid equations of spherical symmetry with serf-gravity into a set of coupled nonlinear ordinary differential equations (ODEs). We focus on the analytical analysis and discuss applications of the solutions to galaxy clusters.     

陕西凤县八方山-二里河（铜）铅锌矿床地质特征及成矿模式

在综合分析凤-太矿集区成矿构造特征的基础上，依据以往总结的凤．太矿田铅锌、金矿聚矿构造模式，通过对八方山-二里河铅锌矿床地质特征的分析，总结了找矿标志，初步认为八方山-二里河（铜）铅锌矿床的成矿模式为：“前泥盆纪海底热水喷流沉积一印支-燕山期构造改造型”铅锌矿床。认为成矿物质来源于基底，后期的构造-岩浆改造使基底成矿元素活化，沿同生断裂迁移、改造，最后在泥盆系中形成的扩容性构造部位富集成矿。提出了下一步扩大找矿的方向和建议。