电力系统概率仿真算法的适用性研究

文章讨论了在电力系统概率安全经济评估中,基于蒙特卡罗抽样的非序贯仿真和序贯仿真的算法实现及相应的风险评估指标,分析了两种算法得到风险指标的差异及影响因素、风险指标的收敛性及准确性以及序贯仿真的应用范围.针对概率安全经济分析中的不同模块,提出适用的概率仿真算法,并提出在后续研究中尚待解决的关键问题.     

乳制品安全风险预警模型改进及实现

为增强食品安全监管工作的针对性和有效性,防控和消除安全隐患,对现有乳制品安全风险监测预警模型进行改进,并通过在乳制品安全监测平台中加入改进后的预警模块完成乳制品安全风险预警平台的搭建。该平台可以实时分析乳制品企业上报数据并及时发现和处理潜在的风险,从而大大提高了乳制品安全监管水平。     

铁路信号产品接口风险分析方法研究

铁路信号产品通常由多个安全相关子系统构成,各个安全相关子系统又由安全相关子模块构成,系统内外均存在非安全相关子系统,因此,安全系统与外围系统,系统内部各模块之间构成了信息交互网络,接口风险分析方法就是用于研究、分析各内外接口之间存在哪些影响安全的风险,并给出如何防护这些风险的安全防护措施。本文将以安全级铁路信号产品模型为例,研究如何做接口风险分析,并对接口分类讨论,分别给出适用于各类接口的安全防护措施。     

数据库技术在计算机审计中的应用

针对现存的应用系统中面临的风险和安全信息漏洞进行分析,利用数据库在安全审计的优点,设计一套适用于应用系统的安全审计平台的模型。同时根据审计实际情况部署审计模块,达到对审计信息有效管理和系统风险及时发现等功能。     

基于Autofac对乳制品安全风险预警系统的扩展设计

根据乳制品安全风险预警系统的需求,在现有程序的基础上实现程序对新增模块的动态兼容和扩展性,降低耦合性。当前解决一般设计模式中的强耦合性,往往会采用IoC框架来进行解耦,其中.net中的Autofac是IoC框架中综合性能最优的一款。讨论了如何利用Autofac对MVC3多项目应用程序的组织优化,使当前乳制品安全风险预警系统能够兼顾程序适应性,健壮性和高效性的同时最大程度的优化程序间各项目的关系。     

基于无线监控网络的智能输液系统设计

介绍一种非接触式红外温度传感器检测管路内药液温度的方法和智能输液装置的动力、加热和安全监控模块的系统组成,详细分析了红外温度传感器在输液过程的监测作用和高精度反馈控制原理;介绍了ZigBee模块与输液装置监控系统的接口电路,分析了利用ZigBee技术实现输液中心无线传感器网络的组网原理;解决了安装布线、治疗过程无人值守、护士多点监管等难题,实现了中心监控、移动监测,安全警示与应急处置相结合的综合管理功能,提升了医护人员的工作效率,大大降低了治疗安全风险.     

化学化工实验室无线安全监测系统故障诊断方法研究

针对化学化工实验室的安全问题设计了一种无线安全监测系统,通过无线通信模块传输现场检测数据和经压缩后的图片,实现了实验室安全远程无线监测与监视的功能. 由于监测系统中的无线通信模块能耗较高,长期运行容易发生故障,其故障检测方式也较为复杂. 为了在线检测无线通信模块的故障和识别其类型,以确保无线安全监测系统的可靠性,研究了无线通信模块的电流特性,建立了基于模糊神经网络的故障诊断模型,可实现对无线通信模块在不同状态下的故障进行诊断. 实验结果表明,与BP神经网相比,采用模糊神经网络的无线通信模块故障诊断方法训练耗时短、收敛快、训练误差和验证误差小、诊断正确率高,能够在线检测无线通信模块的多种类型故障,明显提高了无线安全监测系统的可靠性,具有较好的实际应用价值.      

基于安全协议的智能灌溉系统设计

针对现有智能灌溉系统中数据交互的安全问题,设计了一种基于安全协议的智能灌溉系统.智能灌溉系统以此安全协议为核心,并设计身份认证模块、签名模块、签名验证模块,实现了安全协议.最后对智能灌溉系统进行实验与仿真,实验结果表明基于安全协议的智能灌溉系统运行效率高,在智能灌溉装置计算能力和传输能力较弱的情况下具有良好的适用性和安全性.     

资产证券化风险预警系统的构建

为了对资产证券化风险进行有效控制,需要建立一个灵敏、有效的实时风险预警系统,及时察觉风险隐患。证券化风险预警系统主要由3个模块构成:风险识别分析模块、风险预警处理模块、风险对策模块。3个模块的科学运作,能够有效识别和度量证券化风险,减少风险损失。     

电力系统概率仿真算法的适用性研究

文章讨论了在电力系统概率安全经济评估中,基于蒙特卡罗抽样的非序贯仿真和序贯仿真的算法实现及相应的风险评估指标,分析了两种算法得到风险指标的差异及影响因素、风险指标的收敛性及准确性以及序贯仿真的应用范围。针对概率安全经济分析中的不同模块,提出适用的概率仿真算法,并提出在后续研究中尚待解决的关键问题。     

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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