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1.
基于.NET平台的通用软件框架,设计了一种全新的GUI软件框架,完成了GUI软件框架中的工作流管理模块。  相似文献   

2.
从两方面讨论了Hilbert空间中框架和Riesz基的稳定性:在满足一定条件Bessel序列的扰动下,框架和Riesz基在Hilbert空间中的稳定性;把框架和Riesz基与小波结合起来,在母小波、采样序列的扰动下,小波框架和小波Riesz基在L^2(R)空间中的稳定性.对有关文献的相关结论进行了推广,目的在于可以根据框架的稳定性,设计或者选择一个更优的框架来精确地逼近信号.  相似文献   

3.
产品族设计框架及其关键技术研究   总被引:8,自引:1,他引:8  
分析了典型产品的开发过程,以及产品族设计与单一产品设计的主要区别,提出一种适合于大批量定制生产模式的产品族设计框架,并对其中的顾客需求空间、功能原理空间和结构空间进行了形式化描述.采用聚类分析、结构树、功能技术矩阵和产品功能矩阵等分析方法,对相应的关键技术,如顾客需求的表示与聚类、产品族功能空间的表示及其与顾客需求空间的映射、结构空间的表示及其与功能空间的映射等进行了深入研究.该框架为实现产品族设计中的产品族市场定位、提高零部件可重用性和产品族平台规划提供了系统的分析方法,为企业实施产品族设计提供了理论指导.同时,结合实例对提出的相关方法进行了说明.  相似文献   

4.
Microsoft的.NET框架为分布式应用系统的开发提供了基础支持,本文介绍了.NET框架及其相关技术,并重点讨论了作为分布式应用系统核心的业务逻辑层的设计和实现。  相似文献   

5.
本文在Windows环境下,利用面向对象的分析设计方法,介绍了SGML系统中DTD语法分析器的设计与实现.首先介绍了SGML系统的整个框架,然后详细介绍了DTD语法分析器的分析、设计及各种结构,最后介绍了DTD语法分析器的实现.  相似文献   

6.
基于微软的.NET2.0框架,提出并实现了一个B/S结构的高校实验器材管理信息系统。文章介绍了采用.NET2.0框架的多层体系进行系统的总体构架设计,详细说明了系统的设计思想和实现方法,并重点讨论了Micmsoft SQL Server数据库编程、全新的Web开发技术ASP.NET2.0在系统中的应用。  相似文献   

7.
在构件技术、应用框架、分布式系统等的理论基础上设计了一个基于构件技术的分布式应用框架CDAF,并对此框架及其实现作了详细介绍.  相似文献   

8.
LIMS的技术平台与设计思想   总被引:3,自引:0,他引:3  
简要介绍了LIMS的基本功能,讨论了其实现的技术.分析了LIMS在研究开发性实验室管理等方面的应用特点与发展方向,结合ISO9000质量体系要求,并根据体系所涵盖的管理思想,设计出符合体系要求的管理结构,给出这个系统软件的设计框架.同时,提出了LIMS的发展必须是技术创新与服务意识紧密结合的观点.  相似文献   

9.
提出一种用于测试和验证路由协议的网络模型框架.将框架划分为命令、模型和仿真3个子系统,并采用各种设计模式描述各子系统内类之间的关系,提取出框架的基本模型结构.研究表明,用模式描述设计结构,增强了模块的复用性和可扩展性.  相似文献   

10.
介绍了低值电阻的隔离测试技术,阐述基本方法及理论.在系统组成的框架上,应用单片机、A/D、D/A模块实现硬件电路的设计.简述了A/D、D/A模块的基本结构和与单片机的接口设计.在D/A模块设计中,采用8位精度DAC2级锁存器实现16位的精度.通过台面试验,基本满足设计的测量要求.  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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