江西省修河流域防洪调度系统

修水流域的防洪调度是以柘林水库的洪水调度为中心，兼顾考虑下游地区的防洪任务。因此，防洪凋度的关键是在考虑柘林水库上游来水预报及下游区间洪水预报(主要是潦河)的条件下，制定柘林水库的防洪调度方案。防洪调度涉及众多因素，是非常复杂的决策过程，调度的各个阶段均需要调度人员的积极参与，所以，合理采用人机交互是解决这类问题的有效手段。根据修河流域防洪特点和要求，开发完成的本防洪调度系统包括调度方案生成、调度方案分析和调度方案实施三类功能模块。     

中小流域防洪决策支持系统设计研究：以我国东南沿海 …

以我国东南沿海甬江流域为例,探讨了将地理信息系统应用于中小流域洪水预警和防洪减灾系统的途径和方法。研究设计了中小流域防洪决策支持系统的结构,初步实现了流域水情自动监测、洪水预警、灾情评估和洪水调度等多种功能,该系统有力的提高了中小流域防洪决策水平,并为中小流域防洪减灾决策支持系统的建立提供了经验和模式。     

中小流域防洪决策支持系统设计研究--以我国东南沿海甬江流域为例

以我国东南沿海甬江流域为例 ,探讨了将地理信息系统应用于中小流域洪水预警和防洪减灾系统的途径和方法 .研究设计了中小流域防洪决策支持系统的结构 ,初步实现了流域水情自动监测、洪水预警、灾情评估和洪水调度等多种功能 .该系统有力的提高了中小流域防洪决策水平 ,并为中小流域防洪减灾决策支持系统的建立提供了经验和模式 .     

水情自动测报系统在水库管理中的作用

洋河水库是国家大型水库,担负着秦皇岛市工农业供水及下游的防洪抗旱的重任。洋河流域降水时间集中,河身短,汛期易形成洪水,防汛调度工作十分重要。本文简要介绍了洋河水库水情自动测报系统的功能、特点和运行情况,通过水情自动测报系统在防洪调度工作中的运用,阐明了水情自动洲报系统的实时性、综合性等特点,进一步表明了自动化管理在水利工程中的重要作用。     

水情自动测报系统在水库管理中的作用

洋河水库是国家大型水库,担负着秦皇岛市工农业供水及下游的防洪抗旱的重任。洋河流域降水时间集中,河身短,汛期易形成洪水,防汛调度工作十分重要。本文简要介绍了洋河水库水情自动测报系统的功能、特点和运行情况,通过水情自动测报系统在防洪调度工作中的运用,阐明了水情自动洲报系统的实时性、综合性等特点,进一步表明了自动化管理在水利工程中的重要作用。     

水库防洪风险预警与生态调度的研究及应用

水库防洪调度具有不确定性和实时性,何时何量下泄洪水不仅关系到防洪安全,而且对生态保护也是巨大挑战.为此提出水库防洪调度风险预警指标,在不同洪水级别下,确定合理的生态流量及生态保护策略;在分析水库防洪操作规线的基础上,将洪水实时入流情况与水库目前水位相结合,同时考虑未来洪水情势,对洪水进行监测.通过对现状洪水指标和未来6小时内洪水情势进行分析,在汛期不同阶段,确定防洪与生态调度之间的重要性顺序.以黄河上游龙羊峡水库、刘家峡水库联合防洪调度为研究对象,通过防洪预警的研究及应用,确定水库防洪调度风险程度指导多目标水库防洪、生态调度,为保障黄河安澜提供决策支持,对于支撑黄河流域生态保护和高质量发展具有重要意义.     

不同暴雨条件下扇形和羽形流域的洪水规律

为了探讨降雨过程时空分布不均匀性对河道径流的影响,以沂河、沭河流域为例,利用瞬时单位线法和马斯京根法计算重现期为10、 20、 50 a的3 d特征暴雨和2019年台风“利奇马”暴雨在2个流域中的洪水流量,得出各防洪控制站在不同暴雨条件下的洪水规律。结果表明：扇形流域内洪水汇流较集中,容易发生洪灾;羽形流域内各支流洪水交错汇入干流,近水先去,远水后去,洪水较缓和,沂河的防汛压力大于沭河的防汛压力;在相同降雨量条件下,沂沭河流域内临沂站在从北向南的降雨过程中更易形成大洪峰,斜午站、石拉渊站和重沟站在从南向北的降雨过程中更易形成大洪峰;莒县站位于沭河上游,控制流域包含多个支流和3个水库,流域形状为属于羽形流域的沭河流域中的扇形流域,具有洪水汇流集中的特点,沭河莒县站的防汛压力大于沭河其他防洪控制站的防汛压力,而且当沭河流域出现大范围同步降雨过程时,莒县站更易形成大洪峰。     

防汛工作中存在的问题研究

防汛抗灾是一项非常复杂的社会系统工程,不断提高对暴雨的预测、预警、和预防能力直接决定了防汛抗灾工作的效果。因此,必须制定切实可行的防汛抗灾工作预案,动员全社会的力量,加强水利设施和设备的建设和储备,对病险水库及中小河流进行综合整治,不断提高流域综合防洪能力。本文提出了充分认识新时期加强防汛工作的重要性和紧迫性的要求,并对防汛工作中存在的问题进行了研究。     

浅析依干其水库防御洪水灾害的措施

以依干其水库为例,简述水库地理位置、地质、社会经济概况,根据工程设计及成果、水库存在的问题,提出水库的防洪方案及流域的措施保障,发挥水库作用和效应,为叶尔羌河流域水资源统一调度和配置提供科学依据,为防御洪水灾害提供措施和保障。     

飞来峡水库入库洪水计算模型探讨

在分析北江流域暴雨洪水特性的基础上,针对飞来峡水库流域洪水的特点和复杂性,采用水文学和水力学相结合的方法,构建了飞来峡水库入库洪水计算的耦合模型,整个模型由区间洪水计算的流域水文模型和河网水力学数学模型组成,模型的计算结果表明,洪水模拟与实测过程拟合较好,精度较高.其成果可作为飞来峡水库入库洪水分析和水库动库调洪计算的基础,为水库防洪调度的设计提供依据.在流域洪水模拟的过程中,采用了移用邻近参证流域资料进行水文参数率定和降雨径流模拟,取得了满意的结果,对无资料区间的洪水计算进行了有益的尝试.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.