基于模板的位置地图表达运行机制研究

对位置地图表达模板及表达约束条件进行分析研究,初步设计基于模板的位置地图表达框架。在顾及用户背景信息、地图显示载体信息、情境信息的综合作用下,通过对情境信息进行解析和推理,建立不同地图叠加要素与位置地图要素表达模板的映射关系,并对位置地图表达的触发原理、触发判断和运行机制进行分析研究。     

海藻吸附重金属离子的研究

介绍了目前国内外采用藻类做吸附剂吸附分离废水中重金属离子的研究状况，从不同海藻吸附能力的比较、吸附机`理吸附模型、吸附剂预处理和吸附操作方式等方面进行了详细的描述，指出了目前研究中存在的问题和今后的研究方向。     

地理计算及其前沿问题

地理计算是地理信息科学的核心内容之一, 主要研究地理信息科学的方法学问题, 内容 包括建模、算法、计算体系和一般方法学问题。本文介绍了地理计算的五个前沿问题: (1)地学数据 挖掘从地理学问题出发, 对各种数据作地理学的模型处理和结果计算以发现地理知识; (2)空间运 筹在地理学中的应用日益广泛, 它的算法更加简单严密、精度也更高; (3)多自主体系统模拟已经 成为地理学科学研究中除归纳和演绎之外的第三种重要研究方法; (4) 离散空间的定性计算是进 行地理空间计算的必要基础; (5)本体论的发展是地理信息科学乃至整个地理学发展的需要。     

中国海海底沙波对海缆埋设施工的影响分析

基于中国海大陆架区海底沙波的分布、形态和移动特征,分析了沙波对海缆施工的埋设张力和埋设深度的影响。提出了在沙波区进行海缆施工时应注意的事项和需要采取的必要措施,为在中国海海底沙波区进行海缆施工提供参考和借鉴。     

Application of deep learning technique to the sea surface height prediction in the South China Sea

A deep-learning-based method, called ConvLSTMP3, is developed to predict the sea surface heights(SSHs).ConvLSTMP3 is data-driven by treating the SSH prediction problem as the one of extracting the spatial-temporal features of SSHs, in which the spatial features are "learned" by convolutional operations while the temporal features are tracked by long short term memory(LSTM). Trained by a reanalysis dataset of the South China Sea(SCS), ConvLSTMP3 is applied to the SSH prediction in a region of the SCS east off Vietnam coast featured with eddied and offshore currents in summer. Experimental results show that ConvLSTMP3 achieves a good prediction skill with a mean RMSE of 0.057 m and accuracy of 93.4% averaged over a 15-d prediction period. In particular,ConvLSTMP3 shows a better performance in predicting the temporal evolution of mesoscale eddies in the region than a full-dynamics ocean model. Given the much less computation in the prediction required by ConvLSTMP3,our study suggests that the deep learning technique is very useful and effective in the SSH prediction, and could be an alternative way in the operational prediction for ocean environments in the future.     

气候业务系统运行监控平台设计与实现

为满足国家气候中心各业务系统一体化、精细化监控的需求,设计和实现了气候业务系统运行监控平台。该平台多维度展示了各业务系统的资料及产品完整性、数据库状态、关键进程、数据访问、服务器基础资源等方面的监控结果,并具备故障告警、系统管理、数据推送及展示等功能。本文介绍了平台的运行架构、主要功能,并对关键技术进行了详细阐述。业务实践证明,该平台能够帮助业务值班人员及时、快速、全面掌握各业务系统状态,提高了运维效率,有利于推动气候业务一体化、集约化发展。     

淮南刘庄煤矿定向水平井施工技术研究

刘庄煤矿的定向水平井,为首采工作面的沿煤层定向水平瓦斯抽排井,成井总进尺为1116.60m,终孔直径215.9mm。根据淮南矿区13-1煤层开采显现的三带岩移规律和瓦斯抽放效果的具体分析,该抽排井水平段的设计位置在内错风巷30m和13-1煤层顶板之上25m左右,基本上按照13-1煤层的走向延伸。施工后的实际结果为:水平方向,水平段内错上风巷最小19.88m,最大34.98m;垂直方向,水平段距13-1煤顶板最小距离20.79m,最大距离26.8m;与设计目标基本一致,后期瓦斯抽放效果良好。从介绍该井的井身结构和剖面设计入手,着重对该井在施工过程中的钻具组合、钻探施工、下管固井技术和定向技术进行了详细的说明,最后分析了该定向水平井施工技术取得的主要成效。     

北京市地名数据库的维护更新

北京市地名数据库已于2008年9月建成,对地名数据库的维护更新及应用服务被提上议事日程,其中维护更新又是应用服务的前提。建立了地名数据库维护更新机制,形成了地名数据库维护更新作业流程,给出了地名维护更新过程中的一些问题的处理方法,对今后的地名数据库维护更新及应用服务做了展望。     

Intelligent control for modeling of real‐time reservoir operation,part II: artificial neural network with operating rule curves

To bridge the gap between academic research and actual operation, we propose an intelligent control system for reservoir operation. The methodology includes two major processes, the knowledge acquired and implemented, and the inference system. In this study, a genetic algorithm (GA) and a fuzzy rule base (FRB) are used to extract knowledge based on the historical inflow data with a design objective function and on the operating rule curves respectively. The adaptive network‐based fuzzy inference system (ANFIS) is then used to implement the knowledge, to create the fuzzy inference system, and then to estimate the optimal reservoir operation. To investigate its applicability and practicability, the Shihmen reservoir, Taiwan, is used as a case study. For the purpose of comparison, a simulation of the currently used M‐5 operating rule curve is also performed. The results demonstrate that (1) the GA is an efficient way to search the optimal input–output patterns, (2) the FRB can extract the knowledge from the operating rule curves, and (3) the ANFIS models built on different types of knowledge can produce much better performance than the traditional M‐5 curves in real‐time reservoir operation. Moreover, we show that the model can be more intelligent for reservoir operation if more information (or knowledge) is involved. Copyright © 2004 John Wiley & Sons, Ltd.     

基于SOAP的Web 服务互操作性问题分析

介绍了SOAP、Web服务，说明了在通过SOAP进行RPC调用时当前实际存在的Web服务互操作性问题，同时讨论了导致Web serivice互操作性问题的3个因素：HTTP传输问题、XML问题和SOAP间断性问题。