天文观测数据开放共享政策与策略分析研究   总被引：1，自引：0，他引：1  

万望辉  崔辰州  乔翠兰  赵永恒  郝晋新  薛艳杰 《天文研究与技术》2015,(3)

当代天文学已经进入数据密集型和数据驱动的时代。随着我国天文学研究的不断发展,国内自产的天文观测数据呈现爆炸式增长的趋势。将天文观测数据资源集成并推动数据资源与应用服务的共建共享,建立健全符合科学发展规律的数据资源开放共享政策与制度,使天文科技资源得到高效有序的管理和使用,对国内天文学研究和科普教育的发展至关重要。在充分调研各国政府、部门和国际组织有关政策的基础上,剖析了国外科学数据"完全与公开"的共享原则,介绍了我国科学数据共享有关的管理规定和当前状况,重点论述国际各大天文望远镜项目和天文数据中心天文观测数据资源开放共享的有关政策。对国内天文观测数据资源和开放共享的现状以及存在的问题进行了分析和总结。对我国天文观测数据资源共享工作发展和政策制定提出了具体建议。  相似文献   

Apex determination and detection of stellar clumps in the open cluster M 67     

《New Astronomy》2014

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基于熵的瓶颈运输问题的动态规划解     

岳中亮  由雷 《广东海洋大学学报》2006,26(6):46-49

建立了关于时间（路程）的瓶颈运输问题的动态规划模型，并利用熵作为工具．解决了物品运输过程中所用时间长短的界问题，进而给出易于处理的瓶颈运输问题的动态规划模型。最后给出一个实例说明该方法的实用性和有效性。  相似文献   

Using a hybrid genetic algorithm–simulated annealing algorithm for fuzzy programming of reservoir operation     

Yu‐Chen Chiu  Li‐Chiu Chang  Fi‐John Chang 《水文研究》2007,21(23):3162-3172

We present a novel approach for optimizing reservoir operation through fuzzy programming and a hybrid evolution algorithm, i.e. genetic algorithm (GA) with simulated annealing (SA). In the analysis, objectives and constraints of reservoir operation are transformed by fuzzy programming for searching the optimal degree of satisfaction. In the hybrid search procedure, the GA provides a global search and the SA algorithm provides local search. This approach was investigated to search the optimizing operation scheme of Shihmen Reservoir in Taiwan. Monthly inflow data for three years reflecting different hydrological conditions and a consecutive 10‐year period were used. Comparisons were made with the existing M‐5 reservoir operation rules. The results demonstrate that: (1) fuzzy programming could effectively formulate the reservoir operation scheme into degree of satisfaction α among the users and constraints; (2) the hybrid GA‐SA performed much better than the current M‐5 operating rules. Analysis also found the hybrid GA‐SA conducts parallel analyses that increase the probability of finding an optimal solution while reducing computation time for reservoir operation. Copyright © 2007 John Wiley & Sons, Ltd.  相似文献   

Optimal control algorithm and neural network for dynamic groundwater management     

Hone‐Jay Chu  Liang‐Cheng Chang 《水文研究》2009,23(19):2765-2773

Researchers have found that obtaining optimal solutions for groundwater resource‐planning problems, while simultaneously considering time‐varying pumping rates, is a challenging task. This study integrates an artificial neural network (ANN) and constrained differential dynamic programming (CDDP) as simulation‐optimization model, called ANN‐CDDP. Optimal solutions for a groundwater resource‐planning problem are determined while simultaneously considering time‐varying pumping rates. A trained ANN is used as the transition function to predict ground water table under variable pumping conditions. The results show that the ANN‐CDDP reduces computational time by as much as 94·5% when compared to the time required by the conventional model. The proposed optimization model saves a considerable amount of computational time for solving large‐scale problems. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   

Simulation of small-amplitude frequency-dispersive transient waves by means of the mild-slope equation     

Giorgio Bellotti  Claudia Cecioni  Paolo De Girolamo 《Coastal Engineering》2008

A numerical model based on the mild-slope equation is applied to reproduce the propagation of small-amplitude transient waves. The model makes use of the Fourier Transform to convert the time-dependent hyperbolic equation into a set of elliptic equations in the frequency domain. The results of two available experimental studies on tsunamis generated by landslides are used to validate the model, which appears to be able of carefully reproducing the effects of the frequency dispersion. An example application of tsunamis propagating around the Stromboli island is also presented to show the applicability of the present approach to real life scenarios. It is finally discussed how this model could be applied as support to a tsunami early warning system.  相似文献   

Depth–energy and depth–force relationships in open channel flows: Analytical findings     

A. Valiani  V. Caleffi 《Advances in water resources》2008

In the present work the depth–specific energy relationship and the depth–total force relationship in open channel flows of wide rectangular cross-section are analytically inverted.  相似文献   

基于LINUX及QT/Embedded的点对点视频会议系统的实现     

曾繁冲  卿粼波  罗代升  李金平 《成都信息工程学院学报》2008,23(2):200-203

介绍了目前广泛应用于嵌入式系统的QT类库实现视频会议系统的功能,主要包括了视频音频采集编码模块、网络控制传输模块、视频音频显示播放模块。最终在ARM-S3C2410平台上实现。  相似文献   

A model for analyzing the transshipment competition relationship between the port of Hong Kong and the port of Kaohsiung     

Chien Chang Chou 《中国海洋大学学报(英文版)》2009,8(4):377-384

The transshipment is an important issue in the current marine transportation. This paper constructed a mathematical programming model to elaborate the transshipment port selection for the shipping company. This model is tested by the data collected from the ports of Hong Kong and Kaohsiung. The results show that this model can be used to explain the transshipment competition relationship between the ports of Hong Kong and Kaohsiung well. A sensitivity analysis was also executed. The sensitivity analysis results showed that both the port of Hong Kong and Kaohsiung should decrease the charges of port and increase the efficiency of loading and discharging. Based on the sensitivity analysis results, some interesting conclusions and helpful suggestions were obtained for the managers of the ports of Hong Kong and Kaohsiung to improve their port management.  相似文献   

DSP并行引导方法在氢钟自动调谐系统中的应用     

安艳  刘铁新 《中国科学院上海天文台年刊》2006,(1):92-99

介绍了TMS320VC5402外挂程序存储器的在线编程技术,给出创建系统引导表的具体步骤并在此基础上重点讨论了16位并行引导装载方法,并在以DSP为核心的氢钟自动调谐系统中得以仿真实现。  相似文献