地震应急基础数据库建设

地震应急数据库建设是地震应急工作的核心环节和主要工作内容,中国的地震应急数据库无论从数据内容上,还是数据库建设涉及面都超过以往任何时候地震系统的数据库建设工作,是近期地震系统面临的主要任务之一。从地震应急基础数据库建设的意义、数据库定义、基本数据内容、数据库的作用、建库方法与原则等多方面对目前正在开展的地震应急基础数据库建设进行了阐述,是对前一阶段地震应急数据库建设工作的一个阶段性总结。     

新时期广佛都市圈工业空间拓展的基础条件探析

回顾广佛都市圈工业发展的历史轨迹,采用工业发展区位商从宏观和中观的角度对其工业类型、工业企业规模和工业行业等分析工业空间拓展基础条件,由此把握圈域内的工业体系结构与空间布局的现状特点,提出了新发展背景下工业空间拓展的新路向.     

珠海市暴雨天气的气候特征及影响形势分析

利用1962—2010年珠海市降雨资料和NCEP/NCAR再分析资料,应用小波分析、相关分析等统计方法,对珠海市暴雨天气气候特征及其影响系统进行分析。结果表明,珠海市白天发生暴雨的次数比夜间多,但夜间暴雨的雨量比白天大;大部分暴雨都出现在汛期,汛期暴雨具有次数多、雨量大的特点;暴雨占全年总降雨的比率越来越大,近阶段容易出现旱涝急转的气象灾害。普查分析得出,影响珠海市暴雨的天气形势可分为热带气旋型、锋面低槽型、低空急流型、高空槽和切变线型、辐合带北抬型、副高边缘和东风波型等。     

东川稀矿山式铁铜矿控矿条件新认识

落因背斜两翼地层构造、地层岩相、含矿的差异性,证明背斜轴部存在生长断层。凡有长断层出现,因民组、落雪组岩相剧变,伴随碱性火山喷发-喷溢活动形成细碧岩、基性熔岩、角砾岩之处成为成矿必要条件。     

云南富宁安那金矿控矿因素分析

安那金矿赋存于中泥盆统坡折落组硅质岩夹薄层状灰岩中。东西向安那不对称褶皱构造是主要控岩控矿构造,次级北东向断裂和层间断裂是矿区的储（容）矿构造;矿区的金矿化与基性岩浆活动关系密切。     

城市测绘与城市GIS存在的问题与对策

测绘人才、基础信息、资金投入等是当前城市测绘与城市GIS存在的较为突出的问题 ,要促进城市测绘与城市GIS的发展 ,必须制定相应的策略解决此类问题     

关于建立基础测绘公益性服务机制的探讨

为更好地发挥基础测绘的公益性服务功能 ,特别是为领导决策机关和宏观管理、行政管理服务 ,需要建立基础测绘公益性服务机制 ,并完善基础地理信息数据的提供和使用政策     

Evolution of the General Solution of the Restricted Problem Covering Symmetric and Escape Solutions

The work presented in paper I (Papadakis, K.E., Goudas, C.L.: Astrophys. Space Sci. (2006)) is expanded here to cover the evolution of the approximate general solution of the restricted problem covering symmetric and escape solutions for values of μ in the interval [0, 0.5]. The work is purely numerical, although the available rich theoretical background permits the assertions that most of the theoretical issues related to the numerical treatment of the problem are known. The prime objective of this work is to apply the ‘Last Geometric Theorem of Poincaré’ (Birkhoff, G.D.: Trans. Amer. Math. Soc. 14, 14 (1913); Poincaré, H.: Rend. Cir. Mat. Palermo 33, 375 (1912)) and compute dense sets of axisymmetric periodic family curves covering the initial conditions space of bounded motions for a discrete set of values of the basic parameter μ spread along the entire interval of permissible values. The results obtained for each value of μ, tested for completeness, constitute an approximation of the general solution of the problem related to symmetric motions. The approximate general solution of the same problem related to asymmetric solutions, also computable by application of the same theorem (Poincaré-Birkhoff) is left for a future paper. A secondary objective is identification-computation of the compact space of escape motions of the problem also for selected values of the mass parameter μ. We first present the approximate general solution for the integrable case μ = 0 and then the approximate solution for the nonintegrable case μ = 10⁻³. We then proceed to presenting the approximate general solutions for the cases μ = 0.1, 0.2, 0.3, 0.4, and 0.5, in all cases building them in four phases, namely, presenting for each value of μ, first all family curves of symmetric periodic solutions that re-enter after 1 oscillation, then adding to it successively, the family curves that re-enter after 2 to 10 oscillations, after 11 to 30 oscillations, after 31 to 50 oscillations and, finally, after 51 to 100 oscillations. We identify in these solutions, considered as functions of the mass parameter μ, and at μ = 0 two failures of continuity, namely: 1. Integrals of motion, exempting the energy one, cease to exist for any infinitesimal positive value of μ. 2. Appearance of a split into two separate sub-domains in the originally (for μ = 0) unique space of bounded motions. The computed approximations of the general solution for all values of μ appear to fulfill the ‘completeness’ criterion inside properly selected sub-domains of the domain of bounded motions in the (x, C) plane, which means that these sub-domains are filled countably densely by periodic family curves, which form a laminar flow-line pattern. The family curves in this pattern may, or may not, be intersected by a ‘basic’ family curve segment of order from 1 up to 3. The isolated points generating asymptotic solutions resemble ‘sink’ points toward which dense sets of periodic family curves spiral. The points in the compact domain in the (x, C) plane resting outside the domain of bounded motions (μ = 0), including the gap between the two large sub-domains (μ > 0) created by the aforementioned split, generate escape motions. The gap between the two large sub-domains of bounded motions grows wider for growing μ. Also, a number of compact gaps that generate escape motions exist within the body of the two sub-domains of bounded motions. The approximate general solutions computed include symmetric, heteroclinic, asymptotic, collision and escape solutions, thus constituting one component of the full approximate general solution of the problem, the second and final component being that of asymmetric solutions.     

用VB在AutoCAD中绘制地形图程序开发

介绍了在Visual Basic Language(VB)程序设计语言基础上启动AutoCAD绘制地形图的方法,编写了使用VB通过全站仪导出数据在AutoCAD中绘图的绘图程序。     

新疆地震应急基础数据管理信息系统的研究与应用

介绍新疆地震应急基础数据管理信息系统的研究意义与设计思路,以及系统的各模块的主要功能,并对系统的技术特点进行了总结,最后将该信息系统应用在新疆应急基础数据更新工作中。