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1.
以Access数据库为基础,以招聘求职系统为例进行了网站运行环境及系统分析的介绍,并介绍了人才信息网站所需要的系统模块设计及所需要的后台数据库的设计方法。  相似文献   

2.
该文介绍了盘锦天沐温泉酒店的给排水设计,温泉水的供给是本工程具有的特殊性,也是在设计过程中需注意的地方.  相似文献   

3.
将设计知识和用户知识的提取过程作为获取工业设计知识的方法,并以知识为基础构建数控机床ICAID系统中的知识系统;通过口语分析实验和意象尺度实验,得出工业设计师与工程师的设计思维差异以及构建ICAID系统所需的系统知识,即:关于组织、管理的系统知识与工业设计领域求解问题的系统知识;分析设计师与工程烫师对数控机床造型设计的认知过程,得出自上而下和自下而上2种不同的认知方式,提出对应的意象尺度图与草图器2种知识推理机制;结合设计经验知识与构建ICAID系统所需知识的类型和应用模式,研究ICAID系统的构建方式,提出一个能为用户解决数控机床工业设计领域问题的知识系统模型.  相似文献   

4.
随着嵌入式系统的发展,片上系统(SoC)设计已经成为集成电路设计的发展方向。SoC设计的复杂性对集成电路设计的各个层次,特别是对系统级芯片设计层次带来了新挑战。SystemC是一种完全基于C++的系统级建模语言,它同时支持RTL级、行为级和系统级描述。本文介绍了SystemC的特点和系统设计环境,有利于进行SoC系统级设计,并阐述了一种基于SystemC的系统级设计方法。  相似文献   

5.
阐述了工作流系统的基本概念,介绍了基于XML的流程设计和工作流引擎的设计,使企业可以根据业务流程动态构建企业信息系统.  相似文献   

6.
该设计为上海市和平大厦建筑给排水工程设计,包括大厦给水系统、排水系统、热水系统、消防系统和中水系统的设计.  相似文献   

7.
王恒毅 《甘肃科技》2010,26(18):61-63
在现代工业设计中,许多地方对空调系统的要求越来越高,许多重要房间(电子生产厂房、工厂中的DCS控制室、DCS机柜间等)在全年运行中对温、湿度精度的要求都较高,而现场操作、维护人员相对减少,因此,空调系统的集中精密控制也就体现的更为重要。就此提出了对于空调设计中DDC自动控制系统的设计思路,即可以提高空调系统的有效运转,达到空调系统的设计要求,同时可以节省空调系统的能源消耗。  相似文献   

8.
冯雅男 《工程与建设》2022,(2):343-344,397
妇幼保健院工程属医院类建筑,使用功能繁多,系统复杂,专业性较强,对于给排水及消防设计的要求不同于普通公共建筑.文章以某地妇幼保健院改扩建工程为例,主要针对医院建筑给排水及消防设计不同于公共建筑的部分进行具体分析,并归纳总结,以期为后续相关医院的设计提供参考和借鉴.  相似文献   

9.
本文介绍了基于VHDL数字系统设计方法的重要性,用实验例证阐述了设计同一数字系统的不同设计方法及其特点。对不同的数字系统,根据其组成结构的复杂度如何选用最佳的设计方法,达到最佳的设计目的进行了分析与研究。  相似文献   

10.
进水阀、油路系统、用气系统、供排水系统、监视测量系统是重要的水电站机组辅助设备,只有在水电站机组辅助设备的实际设计工作中重视上述系统和部位的合理化设计,才能够做到对水电站机组辅助设备设计质量的保障。该研究从水电站机组辅助设备中主要的油、水、气系统的设计工作出发,展开了水电站机组辅助设备设计要点的研讨,并且对进水阀和监视测量系统的设计进行了分析,希望对做好水电站机组辅助设备设计工作有所帮助。  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.
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.  相似文献   

18.
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   

19.
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   

20.
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   

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