江苏省公路集装箱运输燃油效率评价

采用非期望产出的松弛测度(SBM-Undesirable)模型,选取柴油量和汽油量作为投入指标,公路集装箱运输量作为期望产出指标,碳排放量作为非期望产出指标,构建公路集装箱运输燃油效率评价模型.在此基础上,对2003—2014年间江苏省公路集装箱运输燃油效率进行评价.研究结果表明,燃油效率高低顺序依次为苏南、苏北和苏中地区.研究时段综合燃油效率总体偏低,呈现波动下降态势,从2003年的0.643 5波动变化到2014年的0.611 6.纯技术效率与综合效率的变化特征大致相同,均呈现下降态势,而规模效率呈现波动上涨趋势,总体上,规模效率纯技术效率综合效率.纯技术效率、规模效率与综合效率的相关系数分别为0.962和0.841,表明综合效率偏低的主要因素是纯技术效率较低.最后,从技术层面与政策层面提出江苏省公路集装箱运输燃油效率改善途径,以期为公路运输能源管理提供参考依据.     

沥青路面常见病害原因及处理措施分析

随着我国公路运输负荷的逐渐增大,我国大量采用沥青路面的公路面临病害严重等问题,对当前公路的修复工作,尤其是对沥青路面的修复与病害防治对于保证当前公路运输能力与效率有着重要意义。本文主要对沥青路面常见病害原因及处理措施探讨分析,以供大家交流。     

公路运输的内部结构浅析

公路运输是我国交通运输领域的重要组成部分,我国的公路运输产业也在近10年内得到了飞速的发展。公路运输具有方便、灵活性强、运量大及中短距离运输的特点,伴随着近些年来物流产业的快速发展,公路运输产业也在不断壮大之中,成为了除了铁路运输之外最为重要的运输方式。要发展好公路运输,就要解决好公路运输的内部结构配置问题,这就需要我们首先了解公路运输的内部结构。     

基于DEA的我国公路运输行业上市公司业绩评价研究

运用数据包络分析（DEA）模型评价公路运输类上市公司绩效以我国公路运输行业17家具有代表性的上市公司为研究对象，通过设立多输入和多输出的指标进行综合评价，找出相对有效的行业标杆，同时分析行业整体和单个公司的资源配置效率，并提出了优化资源配置和提高上市公司绩效的途径．     

公路运输在市场经济理念下经济管理问题的探讨

近年来,随着我国社会经济的快速发展和城市化建设进程的不断加快,公路运输事业也有了很大的进步,对国民经济的发展起到了巨大的推动作用。随着社会主义市场经济体制改革的不断深化,在新的市场经济理念影响下,公路运输实践中的经济管理问题成为当前对公路运输事业发展问题研究的重要课题。该文将对公路运输与经济管理之间的关系、公路运输经济管理的必要性以及当前存在的主要问题进行研究,并在此基础上提出一些建设性建议,以期为我国公路运输事业的发展做出一点贡献。     

2013年—2017年危化品罐式车辆公路运输事故时空分布

为了有效地预防和控制危化品罐式车辆公路运输事故,明确事故发生的原因,运用统计学方法整理了我国2013年—2017年所发生的危化品罐式车辆公路运输事故,从时空角度研究事故发生的基本规律与特点.结果表明:2014年发生的危化品罐式车辆公路运输事故最多,达545起,之后逐年递减;3月—8月的危化品罐式车辆公路运输事故数都在170~200起,12月份达到了235起;在时段分布上,4：00—16：00是危化品罐式车辆公路运输事故的多发期,最高达258起;华东地区、华南地区是危化品罐式车辆公路运输事故的主要发生地;在高等级公路发生的危化品罐式车辆公路运输事故约占总事故起数的81.5%.     

市场经济体制下的公路运输经济管理办法

公路运输是城市当中比较常见的一种运输方式,公路运输工作的稳定运行能够对我国经济发展进步起到积极的促进作用。因此,在城市化发展进程不断加快的当下,相关管理人员越来越重视公路运输的经济管理工作。基于市场经济体制的发展背景下,相关部门对公路运输经济管理工作不断提出新的要求。而该文就结合公路运输与经济发展之间的联系性,研究有效实施公路运输经济管理工作的方法。     

浅谈市场经济条件下的公路运输经济管理

随着我国国民经济的迅猛发展,公路运输的作用亦日益引起人们的关注及重视。为使公路运输更有效地挥其作为实现市场经济发展的基石作用,我国制定了一系列的行政法律规范,保证公路运输行业的可持续性发展。在市场经济的大环境下,公路运输行业应首先适应经济发展的趋势,对行业进行必要的改革,实现对自身行业的经济管理,建立完善,科学,有序的公路运输行业规范,为社会的不断向前发展做出贡献。     

公路运输对企业营收管理的重要性分析

随着我国经济的飞速发展,公路运输行业的发展已成为国民经济发展的重要组成部分。本文主要分析了公路运输在企业营收管理中的重要性,阐述了企业在公路运输营收管理中存在的主要问题,并对如何加强企业营收管理提出了几点意见与建议。     

基于市场经济的公路运输管理探析

公路管理部门如何顺应市场经济发展的相关需求，加快公路运输经济管理的优化与完善，已经成为当前我国公路运输管理中的重点问题。本文分析了加强公路运输经济管理的必要性和公路运输与经济发展的关系，提出了市场经济体制下加强公路运输管理的一些措施。     

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.