Ocean-atmosphere interaction and synoptic weather conditions in association with the two contrasting phases of monsoon during BOBMEX-1999

Surface meteorological parameters acquired during the field phase experiment, BOBMEX-99, for the stationary periods (SP I and II) of the ship ORV Sagar Kanya over Bay of Bengal have been analysed. Active and weak monsoon conditions were observed during the first and the second phase of the experiment respectively over India as well as over the stationary ship location. The phase mean sea surface temperature (SST) is found to be the same in both the phases, however large differences have been observed in the phase mean values of wind speed, mean sea level pressure, latent heat and momentum fluxes at air-sea interface. Synoptic scale monsoon disturbances formed only during the period of strong north-south pressure gradient over the Bay region. Events of prominent fall in SST and in the upper 15 m ocean layer mean temperature and salinity values during typical rainfall events are cited. The impact of monsoon disturbances on ocean-atmosphere interface transfer processes has been investigated.     

区域数值天气实时预报系统的研制

主要介绍在自行研制的神箭SJ－100并行计算机机群上建立的实时区域数值天气预报系统。该系统通过国家气象卫星通信网络获取地面、高空气象探测资料和国家气象中心T106数值天气预报产品资料，并引入北半球海温格点场资料和当地地面观测资料；运用美国MM5模式，建立了三重套网格，最高水平分辨率为15km的业务预报模式，并于2001年1月开始投入业务化试用。试验表明：该系统具有较强的短期天气预报能力，尤其是降水预报准确率较高，近地面气温、风、相对湿度等要素预报质量好。所提供的预报产品客观、定时、定量、定点，预报产品丰富，且计算速度快，收到了满意的效果。     

Technique development of PC104 embedded module and its application in the geophysical instrument design

Introduction Electronic technique has been developing to so large scale integrated and high intelligent that the microprocessor has been the core in the electronic equipment or in the process control system design relying on its strong controlling and computing power, convenience to be application designed and to be programmed. Now the mainstream solutions widely used in the geophysical appliance are the single chip microprocessor (MCS), the digital signal processor (DSP), the common compute…     

PC104嵌入式模块技术研究及在地学观测仪器设计中的应用>.

简单讨论了当前地学观测仪器设计中普遍使用的各种微处理器，并详细介绍了嵌入式PC104模块的特点和功能，揭示了该模块在观测仪器设计中具有较好的适用性和优点．通过对PC104模块各应用技术的具体研究，实现了PC104模块在磁通门磁力仪、地震数据采集器、GPS定位导航设备的实际应用设计．      

PC104串行通信的应用

作者在文中详细阐述了PC104工控机串口的结构和工作机理，探讨了UART异步通信适配器的结构组成，并把该串口通信应用于MCA上，使数据采集仪器结构简单、轻便、体积缩小，便于携带和现场采集应用。     

微机群并行实现Marmousi模型叠前深度偏移

波动方程叠前深度偏移等地震资料处理需要相当大规模的计算资源条件。巨型并行机因其计算能力强而备受工业界的青睐。但其价格的昂贵也限制了使用范围。近年来国际上出现的微机群是一种大规模并行计算的廉价实现方案，本文即是讨论利用微机群来实现Marmousi模型叠前深度偏移所涉及的数值实现。为比较起见，我们选择国际上大规模分布式并行计算机代表－IBM SP－2以进行计算性能的比较。     

计算密集型空间信息服务技术实现架构研究

OGC(OpenGISConsortium)组织所提出的空间信息服务框架中包含多种需要消耗大量计算资源的计算密集型服务,如海量空间信息的存储与获取服务、影像处理服务等,但该组织并未对这类服务的具体实现方式及技术作出规定和说明。针对这类计算密集型空间信息服务,文章从技术层面研究了基于PC集群并行计算环境的计算密集型空间信息服务的实现方法及技术架构,为研究开发高性能的空间信息服务进行了探索。     

地震波传播数值模拟

本文概述了地震数值模拟及其理论基础,阐述了地震数值模拟方法及特点．综述了地震数值模拟方法、三维建模和计算机硬件平台等方面的现状和进展．最后。给出了地震波数值模拟在地震勘探方法研究、地震观测系统优化设计、地震数据处理、地震资料解释、开发地震等方面的应用．     

Development of geo-electrical meter based on networking

Further development of earthquake equipments is closely associated with that of computer technology. Because Embedded PC104 module has the equivalent functions of PC,it has been widely used in recent years,and can provide a new and flexible hardware design environment,but its applications in observation instruments of earth-quake precursor are rare. The present paper introduces in detail the realization of a networked geo-electrical meter by applying the low price,high reliability embedded PC104 industrial computer.     

数字化水位仪LN-3A常见故障类型及排除方法

针对在山西区域地震前兆台网得到广泛应用的数字水位仪LN-3A常见的各种故障现象,分析了其产生的原因,提出了具体的解决方法。