THE EXPERIMENTAL PRINCIPLES AND APPLICATION OF THE MULTI –FORCE SYSTEM TORSION PLASTOMETER

This paper presents the principles of the experimental study by the torsional plastometer with the multi-force systems (i .e .the case of axial compression under torsion and hydrostatic pressure ).Stress analyses of the pure shear tests and the three –dimensional stress –state tests are made .A simple and accurate testing method is suggested for studying the effect of the intermediate principal stress level on the strength and the stress –strain relationship of the soil .At the end ,the extensive uses of this apparatus are given .     

设定地震影响场的GIS模拟r

简要介绍了R. D. Borcherdt提出的考虑场地条件对地震动影响的方法;并利用该方法和美国旧金山湾区(San Francisco Bay Area)详细的地质及场地分类资料,采用GIS技术对设定地震的影响场进行模拟,编制了模拟软件．本研究是与美国地质调查局(U.S. Geological Survey)合作研究的部分成果．      

对NJS-Ⅱ型计算机组成实验仪的改进

介绍了改进后的NJS－Ⅱ型计算机组成实验仪，从而使用户掌握微程序控制计算机的基本设计方法和调试方法，增强动手能力。     

地下水开采——重要的CO2排放源

运用水文地球化学模拟软件计算了大庆市齐家水源地地下水的CO2分压及地下水被抽出至地表与大气CO2达成平衡后CO2自水中的逸出量,结果表明,地下水p(CO2)=1.28×104 Pa,显著高出大气p(CO2);当地下水到达地表环境后将有11.15 mmol/kg 的CO2释放进入大气.进一步的讨论得知,各种岩性含水层的地下水都可以含有较高的p(CO2).因而,地下水的开采成为了一个不容忽视的CO2人为排放源.这应该引起有关学者的重视.     

Discussion on Induan-Olenekian Boundary in Chaohu, Anhui Province, China

This paper proposes a scheme for the definition of the Lower Triassic Induan-Olenekian boundary (IOB) based on investigation of sections in Chaohu, Anhui Province, China as well as data accumulated from other studies elsewhere. The conodont Neospathodus waageni is suggested as the index fossil of the boundary. According to the FAD of N. waageni, the IOB is at the base of bed 25-2 of the West Pingdingshan Section in Chaohu, 42.19 m above the Permian-Triassic boundary, and it is slightly higher than the base of the Flemingites-Euflemingites Ammonoid Zone at the section.     

夏旱期间人工增雨有利天气形势短期预报概模

利用常规资料,通过对有利于人工增雨作业天气型中的两类优势型(T、R型)进行分析发现:在台风型(T)情况下,有利于人工增雨作业的前一天形势是500 hPa副热带高压呈带状分布,脊线位于30°N以北,西脊点在110°E或以西,中低层在120°E附近存在台风倒槽(或存在低压环流),地面处东南气流中;在弱流场型(R)下,其前一天天气形势是中低层有足够水汽输入条件或存在中尺度低值系统,对应地面存在静止锋或为均压场。以此为依据建立了短期(24 h)预报概模。结果表明:预报概模在实际业务应用中效果尚好。     

Design and Implementation of Space Dust Database

Space debris is very dangerous to the security of on-the-orbit spacecrafts, and it is increasing in number at high speed with the expansion of human space exploration. Space debris has become a serious space pollutant noticed by many astronomers. The increase of space dust sources and the development of research on space dust urgently need space dust data sharing and exchanging. It is necessary for us to establish the Space Dust Database to realize the sharing and canonical management of the data. The Space Dust Database (SDD) management system,based on the 3-layer B/S computer mode, was designed and implemented in this paper. The system‘s features include significantly improved runtime efficiency, good scalability and maintainability. The Space Dust Database can pTovide some scientific bases for the study of the chemical constituents, mineral composition, origin and sources of space dust, but also provide excellent data services and decision-making support for the protection of space and model construction of space dust.     

武汉新一代天气雷达CINRAD／SA的环境技术要素分析

介绍了武汉CINRAD／SA雷达系统建设中确定雷达塔高与频点的技术分析过程，明确提出了雷达站四周的净空保护要求；重点计算和分析了CINRAD／SA雷达在3种实际运行模式(vCPll、VCP21、VCP31)下电磁辐射功率密度的空间分布，并按照国家“电磁辐射防护规定”和“电磁辐射环境影响评价方法和标准’’的要求，估算了武汉CINRAD／SA雷达电磁辐射的最小防护距离。     

应用医疗CT扫描法观察恐龙蛋化石初报

应用医疗ＣＴ扫描法观察恐龙蛋化石，可清晰地分辨出卵形，卵壳，卵蛋白，卵黄及充填的矿物等结构，并可测出各部具体数据，为恐龙蛋化石的研究开辟了一个新的途径。     

中低纬Spread-F的数值模拟

本文导出了中低纬地区电离层F区中的Rayleigh-Taylor不稳定性的线性增长率,并对一些典型情况进行了数值模拟研究.结果表明,Ravleigh-Taylor不稳定性的线性增长率随纬度的增加而降低,在中纬度地区,如果没有合适的东西向水平外电场,纯Rayleiyh-Taylor模难于增长,初始扰动将被稳定化.在这些区域,线性增长率的表达式还表明,外电场导致的E×B模的增长率虽然随纬度的增加而减小,但其减小的速率慢于R-T模增长率的减小.非线性的数值模拟则显示,中纬非线性E×B漂移不能象在赤道地区那样使电子密度减小的区域抬升到F区顶部以上,亦即在中纬地区,F顶部以上通常不出现电离层泡,但在F区较低部分可以演化出较大范围的电子密度增强区,这与中低纬地区Spread-F的某些观测特征一致.这说明Rayleigh-Taylor不稳定性与东向水平外电场一起可以成为导致中纬Spread-F发展的一种机制.