公路货物运输动态跟踪系统监控中心应用技术

监控中心是公路货物运输动态跟踪系统的中枢,能够实现车辆监控、货物信息查询、货物动态跟踪等功能。在分析监控中心货运信息数据库、公路电子地图数据库建库的基础上,利用VB6.0和MAPOBJECTS2.0控件开发了单机版监控软件的GIS模块和货运信息管理模块,基于实验数据,模拟了车辆单点定位、车辆监控和货物跟踪功能,为进一步完善系统功能奠定了基础,在陕西省公路快速货物运输系统研究应用中取得良好效果。     

道路危险货物运输管理信息系统框架设计

为了加强道路危险货物运输管理,确保危险货物运输安全,从系统的观点,综合运用智能运输系统(ITS)、全球卫星定位系统(GPS)、地理信息系统(GIS)、全球移动通讯系统(GSM)、通用无线分组业务(GPRS)和计算机网络等多方面知识,根据道路危险货物运输的特点,基于国家ITS体系框架,确定了道路危险货物运输管理信息系统的4大服务主体、6类用户主体,明确了系统的用户需求,构建了系统的逻辑框架和物理框架.为道路危险货物运输管理信息系统的建设作了理论铺垫.     

空间光通信ATP系统粗跟踪平台的混合自适应控制

ATP系统的粗跟踪平台外框架对内框架的耦合作用以及内框架自身的不平衡所引起的加速度干扰是影响空间光通信系统光信号跟踪性能的重要因素。针对方位跟踪通道中的内框架系统结构,提出了应用一种混合自适应控制方法,该方法在设计自适应控制器时采用离散与连续相结合的方法,并将耦合作用和加速度干扰转换为对象的未建模动态进行处理。最终的仿真结果表明,被控对象在具有未建模动态和干扰的情况下,采用混合自适应控制算法能够获得较高的跟踪精度。     

企业的公路货物运输与物流

分析国内企业公路货物运输业的现状,将物流管理引入公路货物运输系统,论述了按照现代物流的运作方式对货物运输系统进行组织以及向多功能化发展的途径。     

基于GIS的数字公路网的设计与实现

介绍了数字公路的概念及特点，结合赣州城乡数字公路网GIS的建立，给出了系统的总体设计框架及技术实现方法，探讨了系统在公路网评价、出行诱导、定位跟踪等方面的应用。     

基于混和Petri网的公路仿真系统模型

公路仿真系统是连续变量动态系统和离散事件动态系统相互作用的混杂系统。通过分析公路仿真系统的混杂特征，在基于Multi—Agent的仿真框架下，提出利用混和Petri网描述系统中离散事件和连续变量相互作用的观点。在传统混和Petri网的基础上，建立了考虑时变特征的推广混和Petri网模型，并建立了基于推广混和Petri网的公路仿真模型体系。将该模型体系应用于驾驶员速度控制过程。应用结果表明，仿真效果良好。     

公路货运现状及发展趋势分析

我国的公路货运历经10多年的发展,公路货物运输行业已成为我国交通货物运输和公路运输系统中一个必不可少的重要组成部分,是实现公路货运的现代化和可持续发展是我国逐步实现交通和运输强国的基础。本文针对公路货运的现状、存在的问题以及今后的发展趋势做出了一些分析。     

基于Multi-Agent的公路仿真系统框架

为了建立公路仿真系统对公路设计的合理性进行评价，研究了公路仿真系统结构问题。公路仿真系统是连续变量动态系统和离散事件动态系统相互作用的混杂系统，通过分析公路仿真系统的特征，建立基于Multi-Agent理论的公路仿真系统框架。将系统划分为3类相互作用的A-gent，即反应Agent、合作Agent和界面Agent，给出了适合公路仿真特点的Agent元定义，建立了各Agent的协商模型，并对其运行机制进行了讨论。该仿真框架的建立，从软件工程的角度解决了仿真过程中混杂性的问题，对于合理设计仿真系统结构具有重要作用。     

柳州市公路货物运输统计调查指标体系研究

文章开展公路货物运输统计调查指标体系研究,旨在对现行的调查指标进行合理必要的改进,藉此建立一套适用型的公路货物运输统计调查指标体系。采用理论与实际相结合的方法,就公路运输统计指标体系的建立问题,进行了系统地分析和研究,针对我国公路货物运输统计调查指标存在调查数据难以满足地区层面决策的需要等问题,结合柳州市的现实情况,提出了一套完整的符合柳州实际的公路货物运输统计调查指标体系。     

消费者行为的动态系统分析

本文以当前流行的消费者行为理论为理论框架，建立了消费者行为动态系统模型，讨论了该系统的动态特性，给出了为渐近跟踪使国民经济系统均衡增长且按劳力平均的消费量Ｃ，所应采取的闭环控制策略，并给出了同时考虑跟踪Ｃ并使消费者福利最大所应采取的随机最优控制策略。     

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.