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1.
在企业电子商务交易平台中,XML已经成为公共数据交换方面事实上的标准。通过对企业电子交易平台中的产品数据管理系统的分析和设计,阐述了XML技术在数据表现,数据交换和数据存储三方面的具体应用。  相似文献   

2.
设计和实现一种针对多用户界面应用系统的专用CASE平台,提出在这种CASE平台中具有新意且实用的代码自动生成方法.在论述作为代码自动生成机制的EFSM的定义基础上,通过实例介绍了在这种CASE平台中基于设计模型提取资源、建立EFSM模型,直到生成代码的全过程,进而验证了多用户界面应用系统平台上基于EFSM的代码自动生成机制的可行性。  相似文献   

3.
在线声誉机制是网购平台重要组成部分,现有研究表明:在线声誉机制对促进平台可持续性成长,建立诚信交易环境,提升网上市场效率等均有显著作用,但在线声誉机制依然面临恶意评价、共谋攻击、评价报复与互惠、身份变更、品格改变、声誉信息收集、声誉度量与使用等方面的挑战。对在线声誉机制的进一步研究可从以下方面进行:基于各类平台、商业模式、社会信用基础等不同情境下的研究;与其它在线交易机制的相互作用以及买家诚信约束问题的研究。  相似文献   

4.
随着计算机互联网技术的不断成熟与完善,云计算开始作为一种全新的应用计算方式进入社会经济生活领域,为网络计算领域带来了新的发展活力。随着互联网应用程序的发展,云计算模式的应用领域不断扩展,已经成为社会经济领域发展的整体趋势。将云计算模式应用于农产品交易服务平台是我国农村信息化建设的必然趋势,也是解决现阶段我国农村经济发展问题的有效手段。该文从云计算模式的优越性入手,分析农产品交易服务平台中云计算的重要作用,并就如何进一步提升云计算在农产品交易服务平台中的应用进行探讨。  相似文献   

5.
诚信原则是指在当事人从事民事活动中,应进行民事行为信息的充分披露,以谋求各方利益较量均衡所应遵循的准则。从用的层面解析人性善恶,并整合出6大类21种交易模式。唯恶大善制恶大善、小恶制小恶、小恶制恶大善三种交易模式符合诚信交易,成为诚信交易模式。而诚信交易模式又要通过其内在机制运作(监督和竞争)、外在诚信建构和制度违反惩罚三个方面加以实现。  相似文献   

6.
作业评价作为课程评价的一个重要方面,反映了学生在学习过程中的发展情况.文章在分析过程性评价和多元化评价理念的基础上,设计了基于Web的作业评价系统,将作业展示在学习平台中,采取目标与过程并重的价值取向,对学习效果、过程及与学习密切相关的非智力因素进行多元化的全面评价,将评价指标划分成若干个维度,通过同学互评、自我评价、...  相似文献   

7.
信用机制的博弈论及其应用   总被引:6,自引:0,他引:6  
以博弈论为基本理论依据 ,以诚信轴为分析工具 ,研究市场经济条件下企业交易行为中的信用机制与策略选择 ,包括完全无约束、社会成本约束及惩罚机制约束三种状态 ;并根据信用等级评估方法 ,分析该机制在交易活动中的应用 ,展示其应用价值 ;最后建议采取相应的奖惩规范措施来维护诚信交易行为 .  相似文献   

8.
诚信原则是指在当事人从事民事活动中,应进行民事行为信息的充分披露,以谋求各方利益较量均衡所应遵循的准则。从用的层面解析人性善恶,并整合出6大类21种交易模式。唯恶大善制恶大善、小恶制小恶、小恶制恶大善三种交易模式符合诚信交易,成为诚信交易模式。而诚信交易模式又要通过其内在机制运作(监督和竞争)、外在诚信建构和制度违反惩罚三个方面加以实现。  相似文献   

9.
王娜  封蕾  张为苗 《甘肃科技》2022,(15):55-57+105
国务院在出台的完善科技成果评价机制的指导意见中,提出通过第三方评价,规范科技成果诚信管理,而构建科研诚信体系服务管理平台是其中任务之一。本研究在分析研究国家政策和行业形势、专家学者针对科研诚信体系建设的基础上,提出了建设我省科研诚信体系服务管理平台,并详细从关键技术、系统架构、平台建设以及保障措施方面,提出了具体的建设方案。  相似文献   

10.
对学生E-learning学习过程进行评价既可以实时监控学生学习效果,又可以对教学产生正反馈。采用数据挖掘的方法从E-learning学习平台中实时抽取出学生在线学习行为数据,提出了基于FCM的E-learning学习过程评价方法,构建了形成性评价系统模型。实验结果表明,该评价方法具有较高准确性。  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
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.  相似文献   

13.
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。  相似文献   

14.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

15.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

16.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

17.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

18.
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the  相似文献   

19.
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with  相似文献   

20.
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