论地幔波震级：—CDSN应用系列论文四

收集了1977—1990年间用 CMT 方法测定的地震矩 M_0和 NEIC 测报的面波震级 M_s 及1900—1976年间一些巨大地震的 M_0、M_s数据,得到 M_s与 lgM_0之间线性—非线性—M_s 最终达到饱和的图象。利用合理的地震运动学模型所相应的地震定标律可以深刻揭示该图象的物理本质。矩震级M_W 与特大地震的 M_s 趋势相一致,表征高于拐角频率时远场位移谱与地震矩 M_0之间的定量关系。本文基于面波的激发和传播理论,提出了测定地幔波震级 M_m 的新方案,并用 CDSN-LPZ 信道中的面波资料测定了1987—1990年间全球 M_s6.6以上浅源大地震的 M_m;同时对 Okal 和 Talandier(1989)的测定结果作了校正。结果表明,这样测定的地幔波震级与中小地震的 M_s 趋势相一致,表征低于拐角频率时远场位移谱与地震矩 M_0之间的定量关系。     

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。