探索联调联试科学方法为高铁开通运营奠定可靠基础

高速铁路的联调联试是高速铁路顺利开通和运营重要技术支撑,是一项既复杂又庞大的系统工程,针对兰新高铁石板墩南(不含)至浩门(不含)段联调联试科学方法及关键环节进行具体分析和研究。     

探索兰州枢纽联调联试工作的科学组织

以徐兰高速铁路宝兰段引入兰州西高速场为例,分析高速铁路枢纽地区联调联试存在的主要困难及安全风险,通过优化试验组织、制定安全卡控措施等方法,探索高速铁路枢纽地区联调联试的科学组织方法。     

观测网络故障诊断与远程维护系统2014年度报告

该报告总结了2014年度观测网络故障诊断与远程维护系统的技术研究和系统研制进展情况,在2013年度技术研究和试验测试的基础上,该年度重点进行了系统的优化设计、系统内的集成测试以及参与大系统的陆上集成联试。观测网络故障诊断与远程维护系统由光学故障诊断分系统、电学故障诊断分系统和岸站故障诊断管理软件三个部分组成。2014年度的主要工作和取得的技术进展包括:(1)完成详细设计报告评审:2014年7月,在成都组织召开了课题详细设计报告评审会,7名业内专家参会,一致认为该详细设计可作为本课题系统设计实现的依据。(2)修改完善系统内部和外部接口设计:主要是岸站故障诊断管理软件与电学故障诊断分系统之间的数据接口(系统内部接口)、岸站故障诊断管理软件与岸基运行控制管理系统(清华大学承研,系统外部接口)。(3)修改完善室内检测大纲,完成系统联调测试:在2013年拟制的室内检测大纲基础上,重点针对岸站故障诊断管理软件的功能进行了细化与调整,并进行了多次室内测试。(4)制定陆上集成联试大纲,初步完成与其他系统的集成调试。按照总体单位的安排,于10月10日进场,在江苏南通中天科技海缆厂房,进行了系统自检测试以及与岸基运行控制系统、主次接驳盒和各类传感器的联调测试。     

仓库智能防控软件系统总体设计

针对复杂环境下仓库智能防控系统中央控制、联调联试的需求,研究了软件系统总体框架设计问题.利用数据流和面向对象的方法,分析了软件系统功能需求,对系统的功能结构和网络构成进行了设计,并提出了相应的软件优化建议.     

仓库智能防控软件系统总体设计

针对复杂环境下仓库智能防控系统中央控制、联调联试的需求,研究了软件系统总体框架设计问题.利用数据流和面向对象的方法,分析了软件系统功能需求,对系统的功能结构和网络构成进行了设计,并提出了相应的软件优化建议.     

电力规约通用测试系统的研究与实现

目前应用的电力系统通信规约种类繁多,但这些规约在测试方法上有一定的相同点。设计了电力规约通用测试系统,给出了开环测试和闭环测试的系统架构,对其中创新性的基于远程调用模块的测试用例管理系统进行了重点介绍,并用该测试系统对正在场内联调的新疆750 kV伊犁变某条线路进行了IEC61850规约一致性测试。     

软件系统测试中的场景建模技术应用

软件系统测试现状 作为现代信息系统的核心,软件的作用日益突出.为了令软件产品功能更完善、架构更健壮、性能更可靠,系统测试工作贯穿于软件生命周期的每个阶段.软件研发过程中,工程人员需要开展各种不同类型的测试,包括单元测试、部件测试、配置项测试、系统联试和系统测试等. 系统联试是由软件研制单位组织的系统连通性验证试验,重点关注系统主要功能的正确性,而受软件研制人员自身思维定势所限,测试粒度、完备性都不够理想.     

智能变电站测试初探

阐述了智能变电站与常规变电站的差异,重点介绍了智能变电站测试的主要内容,并从出厂集成联调测试、站级系统联调测试展开,讨论了测试的具体内容和要求。     

基于LabVIEW的电器虚拟测试技术

将虚拟测试技术引入电器动态测试装置,分析其系统组成,通过调用动态链接库,实现了LabVIEW与数据采集卡的数据交换,通过交互式图形方式进行人机交流,并将数据库技术应用于虚拟测试系统中,从而拓展了虚拟测试系统的功能.     

基于内容中心网络的高速铁路通信系统架构研究

针对基于TCP/IP架构的铁路通信系统GSM-R对高速移动通信支持不足的问题,提出了一种面向内容中心网络的新型高速铁路通信系统架构.同时,结合GSM-R系统因越区切换而导致通信服务质量下降的问题,进一步研究了基于内容中心网络GSM-R系统的传输干扰时间和最大端到端传输时延.仿真结果表明,基于内容中心网络的GSM-R系统,其传输干扰时间和最大端到端传输时延具有优秀的性能表现,可充分应对未来高速铁路移动通信的需求.     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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