智能化农业信息网络与信息服务系统

阐述了重庆智能化农业信息网络的建设方案与实践,以Internet形式建立了智能化农业信息技术重庆示范区的计算机网络,探讨了农业专家系统的设计方法,研究了番茄等5种基于网络的蔬菜栽培专家系统,还研制了网上的土壤信息系统、蔬菜病虫害诊断专家系统和网络在线销售等软件模块,介绍了网络信息服务系统的结构、功能和工作流程。     

基于GIS的土壤信息系统

分析了GIS的功能和技术特点，研制了基于GIS的土壤信息系统。系统采用了Client／Server、Browse/Server相结合的开发模式，采用MapInfo来管理空间数据，SQL Server管理属性数据。系统实现了土壤肥力数据、土壤分类信息等的查询、检索、属性数据统计分析、专题图制作、输出及更新功能。系统的研制为提高农业生产中的科技含量，合理利用各种土壤信息提供了支持。     

基于MapX的渭河流域水环境信息系统的设计

以陕西省渭河流域水环境信息系统为例,对基于GIg的流域环境信息系统的系统目标、系统结构设计、系统内容设计和系统数据库设计进行了分析,并阐述了系统开发中的一些关键技术。系统开发采用客户／服务器结构,并以VB＋Mapx的集成二次开发方式完成系统开发,为渭河流域环境管理部门提供辅助决策支持。     

信息系统安全性评估的研究和评估系统的设计

在研究信息系统安全性保障的基础上,深入研究了信息系统的安全性评估。阐述了信息系统安全性评估的重要性和国内外发展现状,描述了信息系统安全性评估技术。为实现针对信息系统安全性的自动评估,设计了信息系统安全性评估系统。     

云计算技术在高校图书信息系统中的应用研究

中国高校图书馆众多,通常都使用图书信息系统提供信息化服务。这些图书信息系统采用传统的模式设计,存在着资源重复建设、系统扩充能力弱、可配置性差、成本昂贵的缺陷。文章通过研究云计算和图书信息系统的特点,给出了引入云计算技术的新型图书信息系统的设计方案,新系统在图书信息服务能力、资源共享性、可配置和伸缩性方面都有较大的进步,能够整合高校的图书信息,提升信息服务水平。     

基于COMGIS的农业经济发展综合评价信息系统

以福建省基础地理数据和全省67个行政区域5个方面共37个农业经济指标数据为基础,以Visual Basic可视化编程环境和MapObjects组件为开发平台,设计和开发了省级农业经济发展综合评价信息系统.该系统实现了数据更新、图层管理、可视化查询、分类统计、数据空间分析、表格输出、专题地图输出等各种功能.     

基于WebGIS的旅游信息系统的设计

以开封市为例,设计了基于WebGIS的旅游信息系统．该系统采用了WebGIS的基于JSP的实现技术及其地图网络发布工具ARCIMS9．0,及旅游信息系统的多媒体技术和虚拟现实技术等关键技术,使旅游者能够获得图文并茂、声像一体的可交互的动态旅游图．该系统的构建为开封市的旅游管理和旅游业发展提供可靠的信息和依据.     

小区域农业开发信息系统的建立与应用：以嘉荫县落马湖农业开发区为例

本文以小区域为工作单元，以ＰＣＡＲＣ／ＩＮＦＯ为主要支持环境，对农业开发信息系统设计思想，建立过程及初步应用进行了探讨，通过试运行，证明此系统可以满足基层的信息需求。     

公路主枢纽信息系统分析及设计

以连云港国家公路主枢纽信息系统为背景,基于系统工程和软件工程设计思想,运用运输系统规划理论,对公路主枢纽信息系统的业务需求进行了详细的分析,提出了以业务需求为基础的分层分析和设计模式,提出了从物理计算机网络、操作系统、应用系统到具体的运营操作模式的系统结构和运营框架,分析了公路主枢纽的主要业务需求,设计了信息系统的软硬件实现方式,并设计了具体的应用系统。该业务需求分析和系统设计模式可以很方便地推广到其它的公路主枢纽信息系统设计及实现。     

土壤电导监测系统的设计

为实现土壤电导的大范围多点监测,本文设计了土壤电导的监测系统。该系统造价低廉,可作为无线传感器网络的一个节点,应用前景广阔。     

Markedness and its Interpretation in Language Use

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.     

Features of Women's language

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.     

低渗透非均质砂岩油藏启动压力梯度研究

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。     

On Tragic Consciousness In The Works By Ernest Hemingway

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.     

Achieving Unusual States of Matter Under High Pressure

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-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

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     

Call for Papers

<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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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