共查询到20条相似文献,搜索用时 108 毫秒
1.
传统的电子商务应用系统不适应企业业务不断扩展,流程不断变化,存付数据分布处理的要求,这里在应用系统多层架构的基础上,结合分布式组件技术,提出了基于组件的B2C分布式电子商务应用系统框架,给出了系统的逻辑架构,物理架构和设计方法,该系统框架具有较好的可扩展性,可重用性,开放性和兼容性。 相似文献
2.
3.
研究面向SOA技术在网络设备管理系统中的应用,并给出一个基于SSH的J2EE开发框架,探讨此框架的设计策略及其兼容性能,实现业务代码的分离以及程序逻辑组件间的解耦,提高了系统的可维护性、可移植性和可重用性.通过此框架设计开发了网络设备管理系统,系统具有权限控制、弱电间设备管理、IP管理、VLAN管理、网络接口用户管理等功能.实际应用表明,系统运行良好,大大提高了高校中网络设备的管理效率,并为类似应用系统的构建与开发提供了可以参考的解决方案. 相似文献
4.
为进一步改善宁夏气象数据服务水平、规范CIMISS用户数据接口,提升CIMISS基础数据库检索效率,采用VC++和CIMISS API技术设计实现了宁夏气象数据查询系统;系统为授权用户提供从CIMISS基础库中的数据查询、图形展示、导出等功能;系统已经投入到业务使用中,应用结果表明系统对开展气候分析、天气预报、气象资料科研提供有力支撑。 相似文献
5.
《重庆工商大学学报(自然科学版)》2015,(3)
为进一步改善宁夏气象数据服务水平、规范CIMISS用户数据接口,提升CIMISS基础数据库检索效率,采用VC++和CIMISS API技术设计实现了宁夏气象数据查询系统;系统为授权用户提供从CIMISS基础库中的数据查询、图形展示、导出等功能;系统已经投入到业务使用中,应用结果表明系统对开展气候分析、天气预报、气象资料科研提供有力支撑。 相似文献
6.
7.
8.
9.
公共气象服务效益评估业务系统的设计 总被引:1,自引:0,他引:1
随着经济的快速发展,气象服务的需求也变的多样化。为了使公众更好地及时获得准确且符合工作与生活需要的气象信息,提高气象服务水平和效益,本文对照我国气象部门的层次结构,设立了多级别的分组用户权限管理框架,通过理论分析和相应的数学模型推算,为用户设计了一个低成本,高效率,功能丰富,层次严谨,面向整个气象系统的公众气象服务调查效益评估业务系统。 相似文献
10.
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.
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.
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.
Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
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.
Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
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.
Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
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