基于网络的采购系统的设计与实现

网络采购从根本上改变了企业采购模式和采购流程.通过与企业内部各部门、供应商之间的应用集成,企业提高了采购效率,降低了采购成本.着重分析了网络采购的基本流程,建立了网络采购的模型,介绍了采购管理系统的体系结构、功能设计以及系统实现的关键技术,主要介绍了事件驱动控制及分级权限控制技术.系统具有良好的柔性和可扩充性.目前该系统已在企业中试用.     

协同电子商务中网络采购系统的设计与实现

建立了在协同电子商务环境下新的网络采购模型,介绍了协同采购管理系统的体系结构、功能设计以及系统的实现.系统具有良好的柔性和可扩充性.该系统已在企业中试用.在一定的程度上提高了采购效率,降低了采购成本.     

核电项目自主采购成套设备的质量控制方法

核电项目常规岛部分设备通常采用成套包采购.成套包采购是指由设备供货商负责全套设计和供货的设备包,如除盐水制备系统设备包、海水淡化系统设备包、电解海水制氯系统设备包等.本文从业主自主采购成套设备的设计和供货质量控制角度出发,结合自身项目实际案例进行分析,总结出核电项目自主采购成套设备的质量控制方法,以为后续项目自主采购成...     

基于系统动力学的工程材料经济采购量预测

采购管理是整个建筑项目管理的重要组成部分,降低工程材料采购成本直接决定企业利润的高低.为了有效预测工程材料经济采购量的大小,提出了一种新的计算方法,即运用系统动力学模型,并通过实例计算,获得最佳采购量.结果表明:与静态的数学方法相比,系统动力学模型对各采购量的预测结果较为准确,且更能全面的反应整个材料采购的整体动态情况,为正确的决策提供更先进的方法和依据,具有一定的参考意义.     

基于J2EE的医药集中采购系统设计与实施

应当前医药市场的业务需求以及政府集中采购的进一步推广,通过对J2EE规范体系架构的分析和讨论,设计实现了一个基于J2EE的政府医药集中采购系统.提出了一个以J2EE为基础结合MVC设计模型构建电子采购平台的思路,并以一个实例阐述了电子集中采购系统的具体设计与实现方法.     

基于数量折扣的合作采购协调机制分析

针对成本参数和需求参数均不相同的异质买主的一般EOQ订货模型,讨论了供应商最佳数量折扣方案设计下买主间合作采购协调问题.研究结果表明,供应商设计数量折扣方案能否达到渠道协调与买主的采购模式有关.相对于固定价格策略,数量折扣策略能够节约系统成本,令买卖双方分享节约收益.在满足较低订货批量和较低供应商生产准备和订货处理成本的前提下,供应商针对买主合作采购设计的最佳数量折扣方案能进一步协调渠道、节省系统成本,合作采购模式相对独立采购模式占优.     

论建设方对建筑弱电系统技术服务的采购管理策略

随着楼宇、校园、小区等对数字化的要求不断增大,人们时智能化的依赖性也不断增加,弱电系统已经成为建筑中不可或缺的重要部分.而在我们国家,建设方弱电系统技术服务的采购存在着一系列的问题,如:目的不够清晰、成本不够效益、价格质量不相称等等.因此,本文从三个方面来探讨建设方对建筑弱电系统技术服务的采购管理策略.即:合理确定弱电系统技术服务的范围和方式,正确把握弱电系统服务商跟承包商之间的关系,合理确定采购价格.     

基于工作流的物流采购系统的建模设计

讨论了物流管理学科的发展、应用、类型和核心体系,对工作流技术进行简单介绍,采用工作流技术对企业物流管理中的采购环节进行了基于Petri网的模型设计.解决了物流采购系统中存在的团队协作中遇到的问题,使得系统操作更加简便有序.     

谈工程机械设备的采购管理

工程机械设备是工程施工的物质基础,其质量优劣十分关键,同时采购价格也关系着工程施工成本,因此,加强采购管理十分必要.工程机械设备采购需要遵循公开透明、民主决策、防范风险、优质高效的管理原则,强调合规、注重效益,为主营业务发展提供保障支持.施工企业工程机械设备的采购是企业的重大决策行为之一,同时也是一个企业重要的大额支付,而一个系统科学的采购决策流程,对采购工作的顺利进行及开展很有帮助.本论述通过对采购环节的需求定位、商家选定、采购方式确定、采购合同签订、安装验收、售后服务等七个方面对施工企业购置机械设备的重要过程和关键环节进行了总结,对从业者有一定的借鉴意义.     

基于J2EE的电子采购系统的集成设计

本文描述了业务流程再造（BPR）在整合新旧电子采购系统中的应用及J2EE实现过程,探讨了基于J2EE的BPR在电子采购系统中应用的科学性与可行性.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

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

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.