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1.
在计算机支持协同工作的基础上,结合大系统控制论和智能管理,提出了基于计算机支持协同工作的智能CAD系统(CWICADS)。根据工程设计的特点,描述了CWICADS应具备的功能,并针对这些功能,讨论了实现CWICADS的关键问题,通过将人的智能和机器智能结合,形成了人机和谐的协同工作环境,使整个系统具有柔性和智能,从而高效地进行计算机辅助分析,设计和计算,提高了工程设计的效率和质量,最后给出了一种CWICADS的模型。  相似文献   

2.
面向软件工程的工作流管理系统   总被引:6,自引:0,他引:6  
结合CMM思想和RUP技术,提出了以RUP定义的软件开发流程作为模板,以工作流管理系统作为支持环境的软件开发过程管理的新思路,介绍了工作流管理系统的模型基础,即集成化的多视图模型P_PROCE,它以过程视图为核心,集成了产品,资源,组织和控制评价视图,给出了建模,仿真和执行有机集成的工作流管理系统体系结构,在解释了以过程建模,系统维护和模型转换接口三部分组成的工作流建模系统的基础上,阐述了以个人工作台和工作流引擎为主构成的工作流执行和仿真机制。  相似文献   

3.
抗战期间,在中国共产党的推动和领导下,少数民族发挥自身的特长和优势,为中国人民抗日战争的胜利做出了重大贡献,这主要表现为:第一,进一步扩大了抗日民族统一战线.壮大了全国抗日力量,实现了真正意义上的全民抗战;第二,牵制和消耗了日本侵略军的有生力量,彻底打乱了日本帝国主义灭亡我国的步骤和计划;第三,从人力、物力、财力和精神上有力地支援了全国抗战;第四,修建了抗战国际交通线并维护了该线的畅通;第五,充分发挥自身对外交流的悠久历史传统,赢得了国际社会对我国抗战道义上的同情和支持。同时,中国人民抗日战争也对少数民族产生了积极作用和深远影响。  相似文献   

4.
本文介绍了小波分析的发展历程和基本理论;阐述了连续小波变换,二进小波变换,多分辨分析和Mallat塔式算法等重要概念,分析了小波分析优于其它方法的显著特点及其重要价值,并结合已取得的研究成果,详细讨论了小波分析在电力系统状态监视和故障诊断,谐波分析,抗电磁干扰,继电保护和故障定位,负荷预测,暂态稳定,动态安全分析,神经网络,专家系统,HVDC系统和电能质量评估等各个领域成功应用及发展的情况。  相似文献   

5.
本文对铜纤维砼的基本力学性能进行了试验研究,制作了若干钢纤维砼井盖和钢纤维钢筋检井盖;进行了静力试验和耐冲击试验,做了经济分析。结果表明:钢纤维钢筋砼井盖自重轻,造价低,能满足强度,刚度和抗冲击性的要求,且耐磨性和抗疲劳性良好,用它代替普通的钢筋砼井盖和铸铁井盖,将具有明显的社会效益和经济效益。另外,对钢纤维砼基本力学性能的试验研究,为其在土木工程中的推广应用奠定了基础。  相似文献   

6.
传统的学校管理在规章制度上大做文章,把规章制度细则化、标准化,而且配合量化评分和制裁,使规章制度的本质扭曲,领导变成了教师和学生的监工,依法治校变成了以罚治校,管理变成了检查,教师和学生成了严管的对象,从而使教学本性发生了质的变化,教师疲于应付,学生学不自主,在这种情况下进行课程改革也只能是做表面文章,搞形式主义。  相似文献   

7.
GIS支持的孢粉信息管理系统   总被引:2,自引:0,他引:2  
孢粉信息是研究环境演变的信息,它具有时间属性,性质属性和空间属性,其空间特征为GIS技术在孢粉信息管理方面的应用提供了基础,本文在孢粉基础数据库的基础上,结合GIS与数据库技术,初步建立了孢粉信息管理系统,实现了图形属性数据的双向查询,为相关科研,应用部门和个人管理,获取孢粉信息提供了便利和一个较友好的工作平台,同时也为研究工作者提供了新的思路和方法。  相似文献   

8.
本文论述了内蒙古水资源的概况,分析了内蒙古水资源开发利用的现状,研究了可持续发展的实质和目标,指出了内蒙古必须选择可持续发展的道路,最后提出了珍惜和保护内蒙古水资源,确保它持续利用和社会经济可持续发展的方案和对策。  相似文献   

9.
医院急症病人医疗流程重构的研究   总被引:3,自引:0,他引:3  
研究了业务流程重构BPR的哲理,方法和技术在医院急症病人医疗流程构中的应用用,用“ITHINK”软件作工具,在诊断出目前医疗流程中影响服务质量和经济效益的关键因素的基础上,设计了新的流程,建立了新流程的模型,通过灵敏度分析和蒙特卡罗模拟,确定了明显改善医院服务质量和经济效益的最佳方案,由此,得出结论和企业一样,。服务行业通过实施BPR也可以显著地改善绩效,增强组织的竞争能力。  相似文献   

10.
基于多媒体和网络的大学英语教学模式   总被引:1,自引:0,他引:1  
申娟  张春昊 《太原科技》2006,(10):90-91
基于多媒体和网络的教学模式,极大地促进了大学英语教学的改革,它不仅丰富了教学内容,提高了教学效率,而且促进了整个教学观念的更新。对多媒体和网络技术教育中存在的问题进行了分析,重点阐述了多媒体和网络模式下的英语教学优势,探讨了实施多媒体和网络技术教学的必要性。  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.
王慧 《科技信息》2008,(10):240-240
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.  相似文献   

14.
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.  相似文献   

15.
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   

16.
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   

17.
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   

18.
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   

19.
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   

20.
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   

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