高分三号卫星总体设计与关键技术

高分三号(GF-3)卫星作为我国首颗自主研制的C频段多极化SAR卫星,突破了多项关键技术。卫星在明确SAR载荷的体制和基本配置的基础上,围绕SAR载荷的需求开展卫星平台适应能力的分析以及载荷与平台之间的匹配性研究,形成了一系列卫星特点和技术创新点,主要技术指标达到或超过国际同类卫星水平。     

旅游影响调适系统研究

旅游发展对目的地产生各种影响,如何调适旅游影响对目的地非常重要。该文从系统论的角度探讨旅游影响调适问题,分析旅游影响的形成机制,认为旅游影响是旅游影响动力因子模块、旅游影响应力因子模块及旅游影响规范因子模块在旅游影响场的作用下形成的。在此基础上探讨旅游影响调适机理及调适流程,指出旅游影响调适是旅游调适主体通过旅游制度创新系统对旅游利益相关者发生作用而进行的。根据调适机理和调适流程,建立旅游影响调适库,认为旅游影响调适的4个分目标(减量、扩容、治理和适应)通过旅游制度创新系统及其派生措施来实现。     

我国贫困山区可持续发展的因素与目标研究--以黔江地区为例

以黔江地区为例,分析了我国贫困山区可持续发展面临的主要问题和具备的有利条件,在此基础上把区域看作一个完整的系统,运用系统论的观点建立了区域可持续发展的目的体系,并采用灰色系统等定量分析技术与定性分析相结合的方法,探讨了区域可持续发展目标的制定方法。     

Environmental impact of drainage of Dianzi Iron Mine on the groundwater system of the Dawu Water Supply Base

Due to growing water extraction for industry and agriculture, the Dawu Water Supply Base, in the east of Zibo, China, has been in a state of serious over-extraction. It will also be affected by the deep drainage of the Dianzi Iron Mine, which will be exploited in 2005. As to the environmental impact on the groundwater system of the Dawu Water Supply Base is concerned, this paper makes a systematic study about the influence of the mine draining on the water-supply environment of the Dawu Water Supply Base by using the numerical model of groundwater system. The result shows that the groundwater level will have an additional drawdown of 1.2–1.8 m/yr by the mine draining alone. The numerical analysis results indicate that the optimal model for determining the best extraction plan is the solution for the contradiction between water supply and water drainage.     

Cross-formational hydrocarbon fluid flows in the Tertiary deltaic system of the Beaufort–Mackenzie Basin

Molecular and isotopic compositions of crude oils in the Beaufort–Mackenzie Basin confirm three genetic end-member oil groups and suggest extensive cross-formational hydrocarbon fluid flows in the Tertiary deltaic system. Inter- and intra-fractional variations in the geochemistry of the Tertiary-reservoired oils indicate that the oil source/maturity signatures were substantially masked by biomarkers that were picked up along migration pathways. Thus, many of the previously recognized “immature non-marine oils” are in fact thermally mature, probably derived from unpenetrated deeper marine source rocks. Although the effective source rock volumes have not been evaluated and their exact stratigraphic levels remain unknown, the relative timing of oil generation versus trap formation, rather than poor source quality, may be the cause of under-filled traps in the offshore area.     

珠一坳陷始新世文昌组沉积期构造转换对源‒汇体系的控制

An obvious structural transformation between the early and the late stages of the middle Eocene rifting in the ZhuⅠ Depression, which has a significant impact on the formation and evolution of the Paleogene source-to-sink system, has recently been found. Based on comprehensive analysis of seismic, drilling and logging data in the study area, we argue that the structural transformation controls the basic elements of source-to-sink system, such as basin landscape, material source supply, transportation direction and sedimentary style, and affects the deep Paleogene reservoir conditions. Under the restriction of structural transformation, there are two typical source-to-sink models: source migration and fault transformation. Hydrocarbon accumulation related to structural transformation is commonly interpreted by two typical source-to sink models: source migration and fault transformation. The main source of the source migration model migrates under the influence of structural transformation, and the sedimentary boundary, accommodation space and depositional style change accordingly, forming a favorable superimposed and contiguous reservoir target;the supply, transportation and accumulation of provenance in the fault transformation model change orderly in time and space, forming the compound of co-existing fan-delta-beach sedimentary system and reservoir conditions have strong zonation. It is of great significance to explore the characteristics of source to sink system and sand-controlling model under the control of structural transformation in order to find high-quality reservoirs in Paleogene. © 2021, Science Press. All right reserved.     

GIS的社会化及公众GIS

GIS(地理信息系统 )的发展继专业化和行业化阶段之后 ,正处于社会化发展阶段。在该阶段 ,GIS的主要作用是为公众提供信息服务。文章在分析了GIS的这种发展趋势的基础上提出了“公众GIS”的概念 ,即 :直接面向公众 ,为公众提供信息服务和辅助公众进行行为决策的地理信息系统。与传统GIS相比 ,公众GIS更具有信息服务业的特点。公众GIS的建设应该突出信息的全面性、现势性和准确性、系统的友好性以及数据的易维护性等原则。公众GIS的关键技术包括数据采集、网络、数据库、多媒体以及系统的友好性设计等技术。公众GIS在建设全国城市公众信息服务网、全国交通旅游信息网以及汽车导航信息系统等方面具有广阔的应用前景。文章对公众GIS的实例———“今日武汉”公众查询系统作了简要介绍。     

基于GIS的山地林道网优化配置系统

应用系统选择永安元沙国有林业采育场的部分林班为示范,建立森林资源空间数据库.以ARC/INFO为开发平台,以山地林道网理论为指导,应用G IS技术、DBMS技术与数学规划集成技术,使用AML语言进行二次开发设计山地林道网优化配置系统,实现计算机辅助林道网配置,提高决策的科学性。     

省级地震数据容灾备份技术初探

对地震数据容灾备份技术进行了研究,探讨了地震数据容灾备份的重要性及设计方案,及开展此项工作的技术和流程。详细介绍了地震数据容灾备份所需的网络备份技术、数据复制技术、灾难检测技术和系统迁移技术。     

海底勘查技术的最新发展

本文将介绍用于探测海底三维地质特征的海底勘查的最新发展。它主要包括海底地形测绘技术，海底形貌观测技术、海底地层声学探测技术等。