NT+IIS+ASP+数据库构筑动态WEB信息系统

利用WindowsNT4.0及其所带的Internet Information Server和Active Service Page，结合SQLServer数据库，构筑动态Web信息系统已经是一项比较成熟的互连网技术。以宁夏地震局动态Web信息系统的建设为例，对上述技术方案中的一些基本概念、关键技术五一节等问题做了详细的阐述。     

The Relationship between Dst,IMF-Bz and Collision Parameters for O+ + N2 → NO+ + N Reactive Scattering in the Ionosphere

Geomagnetism and Aeronomy - The kinetic theory is particularly suitable and convenient to calculate the collision parameters in the ionospheric medium. In this study, the mean free path (λ)...     

反演=偏移+层析成象

广义的地震反演等于同时进行偏移和反射波层析成象。与医学成象法一样,当源与接收器位于研究区周围时衍射层析成象和反演效果最佳。理论研究已表明,用表面地震反射资料反演可求出速度挠动波数谱上的高垂直波数部分,但低垂直波数部分必须分步骤地得出(如速度分析或反射层析成象法)。作者提出了一种非线性迭代反演法。该法不断地修正非常数背景速度,得出了可分别用偏移和层析成象法分辨的全部波数谱。背景速度必须含有反射面以便能提供穿过大地的上行和下行射线路径,从而提供低波数信息。把地表源与隐伏镜像检波器之间看作为下行传播路径;地震检波器与镜像源之间看作上行传播路径。源和接收器的覆盖区效果上与医学成象一样,虽然虚源与虚检波器的深度必须在求反射面深度的反演过程中确定。理论例子证明理论预计是正确的,并且表明即使没有反射面的先验信息也可同时得出反射面位置和层速度。但是通常要求一个初始模型具有好的低波数谱,以保证反演解的整体收敛。     

碳酸盐+碳酸岩=碳酸盐岩?

<正>碳酸盐、碳酸岩、碳酸盐岩,这三个名字看上去很相近,它们都是些什么"石头"?三者之间有什么联系,又有什么区别呢?根据矿物和岩石的命名经验,名称的最后一个字,通常是给对象属性的一个定性。比如碳酸盐的最后一个字是盐,这说明它是一种盐类,而碳酸岩和碳酸盐岩就分别是两类岩石了。碳酸盐先说盐类。盐类在化学和地质学中都很常见,在地质学中,盐类一般指矿物。什么是矿物呢?矿物就是自然界形成的具有一定结构和一定化学组成的物质,是自然形成     

Injection and acceleration of H+ and He2+ at Earth’s bow shock

We have performed a number of one-dimensional hybrid simulations (particle ions, massless electron fluid) of quasi-parallel collisionless shocks in order to investigate the injection and subsequent acceleration of part of the solar wind ions at the Earth’s bow shock. The shocks propagate into a medium containing magnetic fluctuations, which are initially superimposed on the background field, as well as generated or enhanced by the electromagnetic ion/ion beam instability between the solar wind and backstreaming ions. In order to study the mass (M) and charge (Q) dependence of the acceleration process He²⁺ is included self-consistently. The upstream differential intensity spectra of H⁺ and He²⁺ can be well represented by exponentials in energy. The e-folding energy E_c is a function of time: E_c increases with time. Furthermore the e-folding energy (normalized to the shock ramming energy E_p) increases with increasing Alfvén Mach number of the shock and with increasing fluctuation level of the initially superimposed turbulence. When backstreaming ions leave the shock after their first encounter they exhibit already a spectrum which extends to more than ten times the shock ramming energy and which is ordered in energy per charge. From the injection spectrum it is concluded that leakage of heated downstream particles does not contribute to ion injection. Acceleration models that permit thermal particles to scatter like the non-thermal population do not describe the correct physics.     

基于HTML5+CSS3+jQuery Mobile的台站智能管理系统开发与实现

随着黑龙江省地震局省内运维任务越来越重,出现了运维管理模式无法优化资源配置,运维流程比较随意,设备缺乏数字化管理,运维人员有限等问题。为了解决实际工作问题,结合地震设备运维管理系统软件在黑龙江省区域运维中的应用,采用HTML5+CSS3+jQuery Mobile软件技术开发了一套基于移动端的设备管理系统,使用户可以同时用移动端与PC端,通过Web浏览器操作服务器,实现了区域运维中心对地震监测设备的统一数字化管理,提高了管理效率。