查询词典 geologic time

Main causes and countermeasures for prevention and control of anthropogenic geologic disasters are discussed in the paper.

本文通过大量事例阐述了人为地质灾害产生的主要原因及其防治对策。

Due to the effect of various geologic settings, different gas has different migration characteristics and mainly there are authigenic and self accumulating gas, gas of lateral migration and gas of vertical migration.

由于受多种地质因素的影响，各类天然气呈不同的运移特征，主要表现为自生自储式、侧向运移式和垂向运移式。

Based on the effect of the sanding on the bradenhead, the ground flow pipeline gtv and surface equipment in high pressure and high gas rate well in west Sichuan, and combination with actual engineering geologic characteristic and operation status, the paper analyzed the influencing factor of sanding in the fractured well, and put forward the countermeasures to effectively prevent sanding.

川西坳陷致密砂岩气藏拥有大量的高压高产气井，支撑剂回流出砂问题比较突出。由于气井压力高、产量高、流速快，加砂压裂后常出现支撑剂回流出砂的现象，对井口及地面流程管线闸阀、地面设备造成强烈的冲蚀破坏作用，已经严重影响到气田高压高产气井的正常生产。

The geologic record indicates that a catastrophic quakehits Cascadia only about every 500 years, but the cities of the PacificNorthwest, like Seattle and Vancouver, are far less prepared than SanFrancisco and Los Angeles for a major earthquake, so when the nextpowerful temblor comes around, the region could suffer.

地质记录表明这里每500年才会发生毁灭性的地震。西北太平洋沿岸的城市，如西雅图和温哥华，都不像旧金山和洛杉矶那样对地震准备充足，所以下一次爆发大地震时，这一块地区很可能受灾严重。

The geologic record indicates that a catastrophic quakehits Cascadia only about every 500 years but the cities of the PacificNorthwest like Seattle and Vancouver are far less prepared than SanFrancisco and Los Angeles for a major earthquake so when the nextpowerful temblor comes around the region could suffer.

地质记录表明这里每500年才会发生毁灭性的地震。西北太平洋沿岸的城市，如西雅图和温哥华，都不像旧金山和洛杉矶那样对地震准备充足，所以下一次爆发大地震时，这一块地区很可能受灾严峻。

The geologic record indicates that a catastrophic quakehits Cascadia only about every 500 years, but the cities of the PacificNorthwest, like Seattle and Vancouver, are far less prepared than SanFrancisco and Los Angeles for a major earthquake, so when the nextpowerful temblor comes around, the region could suffer.

地质记录表明这里每500年才会发生毁灭性的地震。西北太平洋沿岸的城市，如西雅图和温e话通聊天室4.7哥华，都不像旧金山和洛杉矶那样对地震准备充足，所以下一次爆发大地震时，这一块地区很可能受灾严重。

Because there exists a high randomness an easier weighted method is used to establish Grid-format data to approximately describe 3-D space topography, 3-D topography is constructed for Grid-format data by using OpenGL technology, and a free transform of the space curved surface is realized, including parallel move, zoom, circumgyrate. Simultaneously, an algorithm of random incision of 3-D space curved surface containing most six sides is provided, in comhination of geologic evolution, element.

由于存在很大的随机性，采用较为简单的加权方法来建立规则网格Grid格式数据体对三维空间地形进行近似描述，利用OpenGL技术构造Grid数据体三维地形，并对构造出的三维空间曲面进行平移、缩放、旋转等自由变换，提供最多6个切面对三维空间曲面进行任意切割的算法，结合地质演化需要，利用双缓存技术实现了地质要素三维曲面动态演化过程。

Cophasal axes on seismic sections play an important role in geologic stratification, fault interpretation, detection of cavities and other anomalous bodies in geophysical prospecting.

地球物理勘探中，地震剖面中的同相轴对地质分层、断层解释、有无形成空洞以及其它异常体的检测中作用重要。

Establish large deformation model of pipes under geologic disasters such as collapse and gulch; simulate and validate these formulas, and make certain of pipe' lapse length, and put forward some defendable suggestions.

基于弹性地基理论和弹性梁挠曲理论建立了埋管在坍塌/冲沟地质灾害作用下的变形微分方程，导出了大变形分析模型；以西气东输工程用管为例，由计算机仿真验证了公式适用性，确定了管道失效长度并提出了预防建议。

According to the analysis result,the condition of the Chengbei Sea ground settlement were summarized:1 The stratum of the study area above 30m is Quaternary Holocene deltaic deposit and neritic facies deposit,and the geologic structure is silty soil,muddy-silty clay,silty clay and silt.

根据分析结果，对埕北海域的地面沉降情况进行了总结：1研究区埋深30m以浅地层为第四纪全新世三角洲沉积和浅海相沉积地层，其结构是粉土、淤泥质粉质粘土、粉质粘土和粉砂。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。