饮马河流域生态调度研究

以吉林省饮马河流域为研究对象,开展生态调度研究,构建了该流域的生态调度模型,并开发了基于两时段法的计算软件系统,给出了在维持饮马河流域现有水库及其配套灌区工程实际供水条件下的河道生态调度结果及水库的生态调度线,对流域生态调度成本进行了详细分析。研究结果可以为饮马河流域内水利工程的科学管理和合理调度提供科技支撑。     

嫦娥二号任务地面应用系统实时业务仿真关键技术研究

通过分析探月工程二期嫦娥二号(Chang’E-2,CE-2)任务地面应用系统的结构和功能,提出了实时业务系统的仿真模型。根据实时业务的功能特点进行了关键技术分析及仿真系统设计和实现。最后针对关键技术问题进行了仿真试验及结果分析,提出了解决问题的思路和方法。论文为嫦娥二号任务地面应用系统数据仿真系统的建立提供了基础。     

Using mobile laser scanning data for automated extraction of road markings

A mobile laser scanning (MLS) system allows direct collection of accurate 3D point information in unprecedented detail at highway speeds and at less than traditional survey costs, which serves the fast growing demands of transportation-related road surveying including road surface geometry and road environment. As one type of road feature in traffic management systems, road markings on paved roadways have important functions in providing guidance and information to drivers and pedestrians. This paper presents a stepwise procedure to recognize road markings from MLS point clouds. To improve computational efficiency, we first propose a curb-based method for road surface extraction. This method first partitions the raw MLS data into a set of profiles according to vehicle trajectory data, and then extracts small height jumps caused by curbs in the profiles via slope and elevation-difference thresholds. Next, points belonging to the extracted road surface are interpolated into a geo-referenced intensity image using an extended inverse-distance-weighted (IDW) approach. Finally, we dynamically segment the geo-referenced intensity image into road-marking candidates with multiple thresholds that correspond to different ranges determined by point-density appropriate normality. A morphological closing operation with a linear structuring element is finally used to refine the road-marking candidates by removing noise and improving completeness. This road-marking extraction algorithm is comprehensively discussed in the analysis of parameter sensitivity and overall performance. An experimental study performed on a set of road markings with ground-truth shows that the proposed algorithm provides a promising solution to the road-marking extraction from MLS data.     

3维电子沙盘在水库防洪调度中的运用

利用3维电子沙盘,结合地理信息系统的分析能力,开发奉化亭下水库3维防洪调度仿真系统。本文详细阐述了系统的总体技术方案、总体框架及关键技术,实现了水库3维淹没分析、库容计算等具体功能。     

A set of linked optimization models for an inter-basin water transfer

ABSTRACT

A set of linked optimization models was used to evaluate planning and operation of the proposed Pamba-Achankovil-Vaippar (PAV) water transfer project in India. The shortage of water for irrigation in the Vaippar basin has led to the need for water import. The project consists of three reservoirs. The models were applied at three levels. At Level-1, the projections of water requirement for irrigation in the Vaippar basin at Reservoir-1 were estimated using an LP model. Level-2 was operated at three sub-levels: the first was the determination of the export requirements from the Pamba basin (Reservoir-2) to the Achankovil basin (Reservoir-1); the second was determining the capability of Reservoir-2 to export and sizing of the three reservoirs to meet the above targets was the third sub-level. Integrated reservoir operation and canal irrigation water distribution were done at Level-3. DP models were employed at levels-2 and 3. The linked LP, DP and simulation models were found effective for planning water transfers.     

工程地质勘察钻探施工工作的几点体会

本人通过对多年来的工程地质勘察外业施工工作的总结,在钻孔结构设计,钻进方法选择、钻探技术及操作方法等几个方面,提出个人的几点体会,供读者在工程实践中参考。     

现代奥运会体育场馆建设及赛后利用研究

对现代奥运会场馆类型、作用、建设和赛后运营情况及存在的主要问题进行了分析和研究,总结了奥运会场馆赛后利用的基本模式及成功经验,提出了奥运会场馆建设与运营的趋势及扩大经济效益的策略。     

海上爆炸排淤填石陆上装药机具的研制与施工方法

介绍了海上爆炸排淤填石陆上装药机具的主要结构特点、参数和构造以及陆上装药施工方法。     

天津城市空间资源信息平台建设实践

国土资源管理方式的变革,迫切需要集约化、面向服务的数据支持。本文结合规划和国土资源管理需要,论述天津城市空间资源信息平台的数据整合、数据发布与数据共享。详细介绍了城市空间资源信息平台在规划和国土资源管理、数字城市和城市电子政务中的应用情况,并提出了下一步工作思路。     

PAM-GSP钻井液在陕北石油钻井中的应用

结合试验对陕北石油钻井所用钻井液进行了研究优化，优化后的PAM-GSP钻井液成功地用于钻进施工，取得一定效果。