浅谈机电设施与相关专业的设计衔接

高速公路的建设是一个巨大而复杂的体系.一个优秀的工程,需要一个扎实、详尽的设计作为基础.这就要求设计过程中的各专业间密切配合,通力合作.由于机电设施的特殊性,其实施必须建立在主体工程及房屋建筑等各相关专业提供的界面的基础上,文章从机电设施设计的角度,阐述机电系统对各相关专业的需求.论述什么样的界面,才能保证现场最小的协调、变更量,才能做出优秀的机电工程.     

SQL Server数据库中多媒体信息的抽取与转换

为了解决当今Internet环境中大量多媒体信息的使用问题,本文主要解决在媒体的生命周期中对多媒体内容的管理环节的问题:信息的抽取和不同格式的信息的转换.在.NET 环境下从现有的 SQL Servor 数据库进行多媒体信息的提取,利用在描述数据的结构和内容方面有其固有的优势的 XML 技术来保存信息,并最后通过XSLT样式表来对主要的信息进行抽取,在此基础上,向用户提供更好的多媒体内容服务.     

一枝一叶总关情--《尘埃落定》的比喻特色

作者在将人物生动形象化的同时,将笔触伸入到人物内心世界作深层次的刻镂;从喻体的选择角度,对其民族风情作"一斑"的窥见,有利于傻子视角的确立;其意蕴比显现的形象要深远,能为人们的解读提供更为广阔的空间和多种可能.     

交联聚苯乙烯粒子的中空结构及其分析

以含有油性添加物的苯乙烯-二乙烯基苯悬浮聚合制备交联聚苯乙烯中空粒子.通过对干燥后再溶胀的粒子的热失重分析,借助于粒子中溶胀的异辛烷的释放特性及其释放速率的变化规律,探讨了聚合中单体组成、添加物性质等因素对粒子中空结构形成及其壳层结构的影响.结果显示,易与聚苯乙烯链形成相分离的异辛烷可以产生单中空结构的粒子,并且发现,中空粒子中溶胀物的释放可分为两个具有不同速率特征的阶段,二乙烯基苯的含量会对中空粒子空腔形态与壳壁结构产生进一步的影响.     

不同立地条件下沙棘种群生物量的比较与预估

采用标准株收获法对西北半干旱半湿润地区的沙棘(Hippophae rhamoides L.)灌木生物量进行了测定,结果表明由于不同地区气候和土壤条件的差异导致了沙棘生物量亦存在较大的差异:生物量中树干所占的比率随树龄的增长先增大后减小,枝条所占比率相对保持稳定,叶子所占的比率则随树龄增大而减小;生物量的茎根比随树龄的增长而增大,且与各地区降水量呈正相关;根系的分布一般较浅,大约有65.66%～79.95%的根系生物量分布在0～15 cm的土壤表层,而且在径级为φ＞4 cm和φ=1～2 cm根系上的分配比例占到总量的1/2以上;根系长度在径级φ＜0.5 cm的毛细根上的分配占到根系总长的64.894%～80.09%;根瘤的数量在6～10龄沙棘上分布最多,且主要分布于0～15 cm土层和径级φ＜1.0 cm的细根上.此外,沙棘地上部分生物量可用生长因子或立地因子两种模型进行预估,而且在各立地因子中,区域气候和土壤条件对其生物量的影响最为显著,其次为坡向和坡位,坡度的影响最小.     

试论唐代进士的得官之艰

科举制度是中国古代自隋唐以来的最基本的选官制度,在唐代,它确实为统治阶级选拔了很多的人材,但也埋没了很多人材.本文简单介绍了唐代科考的一个侧面,就是进士及第后的情景,包括及第时的荣耀和吏部复试时的种种弊端,其中主要是后者.企图通过这一细节,让人们了解唐代科举考试的不为很多人知的另外一面,揭示统治阶级和当权者的压抑人才、摧残知识分子的腐朽性.     

益生新政

从执行总裁到总裁(总经理)再到董事长,益生生物的王永胜用了不到三年的时间完成了他在直销行业的亮相与转身。此时的王永胜,已经不再热衷于行业落魄人物的投靠,他希望自己的益生王国能有更大的发展,正是在这种宏图志向的推动下,若楠空降益生生物,开始了又一轮的益生新政。     

清末新政——中国近代化的里程碑

二十世纪初,清政府的新政是在丧权辱国的《辛丑条约》的谈判过程中拉开帷幕的。而经历了洋务救国失败的开明官僚,深切地认识到要救亡图存必须实行新政,进而使近代司法政治制度得以形成,也促进了经济自由思想的发展,对儒学的冲击则促进了新式教育的发展。一、司法体系和近代政治制度的形成清政府原来实行的是专制体制。清末新政中的司法改革措施则是这一转型的起点。古代中国司法权的运作呈现出非理性特征:第一,没有把坐堂问案的司法与主动管理社会的行政区别开来;第二,儒家礼教和上级的个别指令等法外标准优于法律标准;第三,片面强调个案判决的结果正义,     

利用加锤摆精确测量重力加速度的方法

通过对物理摆周期的计算,得出可倒摆为物理摆的特例.对不同密度的加锤摆进行理论分析,得到只要摆锤的几何尺寸相同(回转半径相同),则沿摆杆移动的摆锤一定有两个等周期且与摆锤质量无关的周期不变点,并推导出周期不变点的位置公式.所推导的公式为精确测量重力加速度等物理量提供了理论支撑.用自制仪器所测得的实验结果与理论结果进行比较,周期误差小于0.7%.     

张咏——宋初政治文化重建背景下的新型人格

张咏是宋初第一代新型文人的杰出代表,史学家对他的关注首先集中在以文官掌兵的成功实践上;但就整体而言,张咏为重新建立儒家道德规范而进行的种种努力,以及他自觉捍卫皇权的权威、胸怀天下、以民为本的政治理念等,更能体现新的时代特征.张咏的人格品质还显示着集官僚、文士、学者于一身的基本特点.而所有这些都与他青年时代的学习、生活经历密切相关.     

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.