浅谈某高速公路沥青路面机械设备的选配

我国的公路事业进入了以建设高速公路、一级公路等高等级公路为主的新时代,目前沥青混凝土路面的施工技术较为成熟,已得到广泛的应用。在沥青混凝土路面的施工中,机械设备的合理选配对建设进度、质量及成本有着重要影响。下面我谈谈邛名高速公路沥青混凝土路面机械设备的选配。     

强盐渍土地区公路布袋灌注桩施工技术

内陆盐渍土在我国西北地区广泛分布,对工程施工制约因素很多,尤其对公路桥梁基础的耐久性影响较大,"布袋桩"施工技术解决了强盐渍土地区桥梁防腐技术难题。本文以青海省察尔汗盐湖强盐渍土地区,连霍高速柳格联络线大柴旦至察尔汗高速公路发展大道,跨青藏铁路互通立交桥梁基础施工为例,阐述了公路大直径布袋桩施工技术在强盐渍土地区的应用及其注意事项。     

影响公路施工相关质量因素及其控制措施

随着社会经济的发展,基础设施建设规模的全面展开,对公路建设的重视度也逐渐增加,提高公路工程的建设质量,探讨加强施工质量控制的方法,切实提高公路工程质量管理水平,值得我们专业人士去关注。高速公路施工过程中影响工程质量的因素有很多,目前主要有三个因素：设计因素、管理因素和施工因素。该文对影响公路施工的质量因素进行了分析并提出控制措施,希望该文能为高速公路路面施工的管理带来一定的启示。     

公路工程施工中关键部位的施工技术探讨

自从改革开放以来,我国经济还有社会建设都迅猛发展起来,高度公路的建设也是这样。高速公路建设的快速发展除了给人们的生产生活带来更多的便利之外,施工的环境也越来越复杂,高速公路施工的技术要求越来越高,公路施工工程关键部位的施工必须重视起来。该文主要就公路工程关键部位的把控、管理以及施工技术3个方面进行简要分析,希望能对如何做好工程施工中关键部位的施工工作有所帮助。     

西北地区水资源问题及其解决途径

西部大开发是一项规模宏大的系统工程，也是西北地区经济发展的历史机遇。水不仅是西北地区经济发展的主要制约因素，而且是西北地区脱贫致富的希望所在。水资源的高效利用、有效保护和合理配置，关系到西北地区经济发展、社会进步、民族团结、边疆稳定的发展大局；关系到国土综合整治、“西部大开发”战略的实施、全面小康社会的建设、生态环境保护与修复等事业的成败。本文分析了西北地区水资源的现状及问题，讨论了西北地区水资源利用中产生的原因，提出了西北地区水资源科学利用的主要对策。     

高速公路机电工程监理的探讨

机电工程在高速公路交通工程建设中占有重要地位,其施工质量直接影响工程项目的建设质量及公路的安全运行。文章简述了高速公路机电工程施工监理的技术方法,提出技术与管理的重点及难点,对保证高速公路机电工程的施工质量具有重要的意义。     

枣庄市水资源评价及开发利用

一、水资源的构成水资源包括地表水资源和地下水资源两部分。他表水资源主要指大气降水形成的地表径流,一地地表径流一般有两部分组成,即境内径流和容水流入。影响地表径流形成的因素很多,可概括为自然因素和人为因素,在对他表水资源进行评价时,应去掉人类活动对地表径流的影响,这样所推算出的地表径流量,即通常所说的地表水资源量。据计算,枣庄市多年来平均地表水资源总量为12．8亿立方米,其中境内径流量11．6亿立方米,入境客水1．2亿立方米。地下水资源来源于大气降水和河道、水库塘坝等的渗透补给,由于地下水埋合条件和运动规…     

关于高速公路特殊路基施工技术的分析

在现代高速公路建设研究中,特殊路基施工是一项发展历史较短的领域,然而我国古代人民很早就已经进行过类似的工程处理,当前盛行的一些特殊路基施工技术可以在古代公路中寻找到其类似手段。我国近现代高速公路特殊路基施工技术的发展主要是在新中国成立之后,最快的发展时期为近30年。本文就石灰土基层施工技术在高速公路工程特殊路基施工中的应用等内容进行了浅要的探讨。     

浅议高速公路建设项目的水土保持

分析了高速公路建设项目水土流失的成因及危害,结合公路项目建设的特点,对新增水土流失防治应根据不同防治分区、地表扰动情况和工程布局、施工特点等,结合高速公路综合防护和道路沿线绿化美化的特殊要求及其防治目标,提出了可行性较强的综合治理措施。     

探讨高速公路路基施工技术与相关质量控制

公路路基施工是高速公路建设最重要的环节,本文主要探讨了高速公路路基施工技术,并深入地研究了其相关质量控制。     

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.