区域综合地图集总体设计思路探析

区域综合地图集的编制已成为一个国家或地区综合制图水平的体现,其设计与制作仍然是最本质的内容。本文首先分析了在数字制图环境下,区域综合地图集的编制现状及特点,接着重点从可持续发展观、区域特色等5个方面阐述了区域综合地图集的总体设计思路,以此为区域综合地图集的编制总结理论与实践经验。     

松辽盆地北部嫩江组一段油页岩测井识别

利用松辽盆地北部地区的测井资料,总结出松辽盆地北部地区嫩江组一段（K₂n¹）油页岩测井响应特征.并优选参数,以深度700 m为界,建立了油页岩测井识别图版.图版精度在72.4%以上,为松辽盆地北部地区油页岩勘探开发提供了依据.     

梅山龙宫景观资源及其照明设计

本文通过对梅山龙宫地下河洞穴系统空间、水体、次生化学沉积物的调查,揭示了该洞穴“险、幽、秀、奇”的景观资源特征。针对游览洞穴开发应遵循的原则,提出了洞穴的照明设计应遵循“自然、艺术、协调、安全、特色”基本原则,并论述了洞穴照明设计理念,即景区设计理念在于使洞穴空间得到艺术性体现,景点设计在于对景点形态进行艺术造型。此外,该文还论述了运用照明技法在梅山龙宫中的应用。      

太原基准地震台高清监控系统建设

为落实安全生产工作要求,太原基准地震台急需建设一套高清视频监控系统。文章着重介绍了高清监控系统的建设思路、设计方案、系统功能,该系统可为进一步增强台站安全技防能力、解决当前地震台站安全防范问题提供技术支持,也为同类台站提供安防建设思路。     

网络地图的设计原则

本文从网络地图的特点与功能入手,分析国内外主要地图学网站上的网络地图,结合笔者所进行过的纸质地图与电子地图设计研究及网络地图的设计,总结网络地图的设计特点,提出网络地图的设计原则。认为网络地图不同于一般的电子地图,网络地图的设计应有自己的特点。目前国内外主要地图学网站上的网络地图在地图设计上存在着这样或那样的问题,因此影响了网络地图的信息传输效果,不能发挥其应有的作用。笔者对此进行了分析,结合分析结果,提出了网络地图在界面设计、色彩设计、符号设计、分层设计等方面的设计原则。     

黄土场地地铁车站振动台试验方案设计与研究

为得到可靠的试验数据,对黄土场地典型断面地铁车站大型振动台试验方案进行设计与研究.根据试验目的和特点,提出黄土场地与地铁车站动力相互作用模型体系相似设计原则,并基于Bockingham的π定理对模型结构进行相似设计;通过室内试验研究模型材料配合比、力学特性及模型制作技术;采用有限元-无限元耦合数值建模方法,分析黄土场地...     

Wavelet-based generation of spatially correlated accelerograms

For the seismic analysis of complex or nonlinear extended structures, it is useful to generate a set of properly correlated earthquake accelerograms that are consistent with a specified seismic hazard. A new simulation approach is presented in this paper for the generation of ensembles of spatially correlated accelerograms such that the simulated motions are consistent with (i) a parent accelerogram in the sense of temporal variations in frequency content, (ii) a design spectrum in the mean sense, and (iii) with a given instantaneous coherency structure. The formulation is based on the extension of stochastic decomposition technique to wavelet domain via the method of spectral factorization. A complex variant of the modified Littlewood-Paley wavelet function is proposed for the wavelet-based representation of earthquake accelerograms, such that this explicitly brings out the phase information of the signal, besides being able to decompose it into component time-histories having energy in non-overlapping frequency bands. The proposed approach is illustrated by generating ensembles of accelerograms at four stations.     

Design pressure distributions on the hull of the FLOW wave energy converter

This paper presents a procedure to calculate the design pressure distributions on the hull of a wave energy converter (WEC). Design pressures are the maximum pressure values that the device is expected to experience during its operational life time. The procedure is applied to the prototype under development by Martifer Energy (FLOW—Future Life in Ocean Waves).A boundary integral method is used to solve the hydrodynamic problem. The hydrodynamic pressures are combined with the hydrostatic ones and the internal pressures of the large ballast tanks. The first step consists of validating the numerical results of motions by comparison with measured experimental data obtained with a scaled model of the WEC. The numerical model is tuned by adjusting the damping of the device rotational motions and the equivalent damping and stiffness of the power take-off system. The pressure distributions are calculated for all irregular sea states representative of the Portuguese Pilot Zone where the prototype will be installed and a long term distribution method is used to calculate the expected maximum pressures on the hull corresponding to the 100-year return period.     

航海通告编发模式的研究与进展

通过回顾改革开放以来航海通告发布工作的发展历程,重点是应用“航海通告数字化综合编辑出版系统”的情况,对航海通告编发技术的改进和发展进行全景分析,并对今后航海通告的发展提出设想。