上海市规划和国土资源信息化工作的主要情况和发展思路

本文介绍了上海市规划和国土资源信息化工作的主要特点,取得的主要成效,在深入分析当前规划和国土资源信息化面临的主要问题的基础上,明确提出了今后信息化工作的发展思路,包括信息化建设的主要目标和具体措施。     

河北省40年防震减灾工作回顾与展望--纪念邢台地震40周年

40年来,河北的防震减灾工作在中国地震局和省委、省政府的领导下,全省地震工作者和各有关部门,为建立、推进和发展我省的防震减灾事业做出了不懈的努力和探索,特别是“九五”、“十五”以来,我省认真贯彻落实党和国家关于防震减灾的各项方针、政策,在加强领导、建立健全防震减灾工作体系,加大投入、夯实监测预报基础,加强综合防御、依法推进防震减灾工作,发挥政府职能作用、切实做好地震应急准备等方面,取得了一些进步与成绩。认真、全面、科学地对河北省40年来的防震减灾工作进行回顾总结,对于我们发扬成绩、开创未来,具有重要的意义。     

西秦岭关家沟组物源分析

西南秦岭摩天岭地区关家沟组的时代、沉积环境及构造背景一直是争论的焦点。对关家沟组粉砂岩、板岩进行了常量、微量及稀土元素地球化学分析表明关家沟组物源主要来自活动大陆边缘的岛弧环境。以本区地层斜层理产状及砾石优选方位为依据,对关家沟组岩层古水流方向综合分析,推测其古水流方向为230°~356°,以北西向为主;砾石的优选方位在228°~338°之间,以北北西向为主;砾石分布特征由南向北颗粒由大逐渐变小、磨圆度由差至较好、优选方位由杂乱到较好的变化趋势。结合前人成果,关家沟组应属于碧口弧前盆地系统内,推测关家沟组内的沉积物主要来自南东向的岛弧。     

Experimental Study of Wave Pressure on a Breakwater Pier

Test studies on the wave pressure on a breakwater pier show that the influence of transmissivewave pressure on the outside wall of the breakwater pier is considerable,when the width of the pier is notvery large.The variations of transmissive wave pressure on the breakwater pier with different widths arecompared and the relationship is obtained between relative transmitting distance b/L and wave pressurereduction factor K,which may be used in the design of similar breakwater piers.     

四川山地地震勘探及主要技术应用

四川的地震勘探以山地地震勘探为其主要特点。四十年来，基本基本形成了四大技术系列，即：山地地震采集技术系列；高陆复杂构造资料处理技术系列；碳酸夺储层横向预测技术系列；人机联作综合解释技术系列。针对山区资料特点，采用叠后深度偏移技术、山区静校正技术、去炕席干扰技术、高分辨率处理技术等，使构造成果精度大幅度提高。在新的处理解释技术推广区，地震解释的构造目的层深度与实钻结果的相对误差小于３％，其中７６％左     

Experimental Study on the Armor Grate Plate of Sloping Breakwater Under the Action of Irregular Waves

The irregular wave experiment on the stability of the Grate Plate was carried out in the lightof the wind wave spectrum recently advanced by Prof.Wen Shengchang.The stability formulas of GP un-der the action of irregular waves were procured.Comparisons between the formulas obtained and those ofGP under regular waves advanced by the first author in 1993 showed a coincident result.     

Study on shear wave splitting in the after- shock region of the Yao′an earthquake in 2000

Introduction Rock microcracks in the crust play very important roles in all kinds of geophysical phe-nomenon variation (Aki et al, 1970; Crampin et al, 1980). The medium anisotropy of the upper crust has been studied extensively, mostly based on analysis on shear wave splitting from local earthquakes. Commonly, explanation for the upper crust anisotropy is the assumed ″extensive di-latancy anisotropy″ (Crampin, 1978) or its modified version ″anisotropic poroelasticity″ (Crampin and Zatse…     

Long-period ground motion characteristic of the 1999 Jiji (Chi-Chi),Taiwan,main-shock and aftershocks

Introduction The study of attenuation relations for long-period ground motion is to meet the requirement of economy development. During the earthquakes such as the June 16, 1964 Niigata, Japan, M=7.5 earthquake, the March 24, 1977 Romania M=7.3 earthquake, the March 29, 1970 Gediz, Turkey, M=7.1 earthquake, the May 26, 1983 M=7.7 earthquake in the middle Japanese Sea, the September 19, 1985 Mexico M=8.1 earthquake, the September 16, 1994 M=7.3 earthquake in Tai- wan Strait, and the No…     

前兆台网遥控供电仪的设计

介绍了前兆台网遥控供电仪的设计思路和设计技术，就该遥控仪可实现的功能进行了描述，给出了遥控仪的技术指标和应用图例。该遥控仪可以满足遥测台站供电控制的需要。     

Study on shallow structural features Changbaishan Tianchi volcanic region

A seismic survey by 10 shallow profiles and 6 ultra-shallow profiles was performed in Changbaishan Tianchi volcanic region in 2002. The result shows that there are three （in some areas as many as seven） stable interfaces in the survey region, but no reflection phases are found in depths greater than 500 m. The number of interfaces in the southwestern part is obviously greater than in the northwestern part of Tianchi volcano, which suggests that the faults in the southwest have a stronger controlling power over the flow direction of volcano-spewed lava as compared with those in the northwest. Six shallow faults exist in the survey region. The shallow faults are nearly vertical graben-like faults and are mostly distributed on the southwest of Tianchi crater, indicating that volcanic activities in the southwest are stronger than in the northwest. On this ground, it could be further deduced that the NE-trending major fault of Tianchi volcano （ the Liudaogou-Tianchi-Zengfengshan fault） is more active than the NW-trending Baishanzhen-Tianchi-Jince fault.