计算机安全概述

1.计算机系统面临的威胁和攻击一类是对实体的威胁和攻击;另一类是对信息的威胁和攻击。计算机犯罪和计算机病毒则包括了对计算机系统实体和信息两个方面的威胁和攻击。1.1对实体的威胁和攻击主要指对计算机及其外部设备和网络的威胁和攻击,如各种自然灾害与人为的破坏、设备故障、场地和环境因素的影响、电磁场的干扰或电磁泄漏、战争的破坏、各种媒体的被盗和散失等。     

国家利益与国际利益概念之辨析

国家利益和国际利益是一对既有区别又有联系的概念,对它们的准确把握和认识将有助于我们对国际政治的研究.本文从两对概念的含义和特征出发,对它们进行了分析和比较,意在使我们对这对概念有一个清楚的认识,为国际关系研究打好基础.     

东莞市高校金融投资相关专业建设研究

本文通过对东莞市企业和家庭对金融服务业的需求和东莞市金融机构对金融人才需求情况的调查,得出东莞市金融服务业发展前景广阔、但是人才缺乏的结论：通过对东莞市居民和学生对金融服务业工作的意向的调查,表明他们对金融服务专业的学习和求职的意向强烈。因此,我们建议东莞市各高校应该加强金融服务相关专业建设,满足社会和经济发展对金融人才的需求。     

预测竞争性和非竞争性剪接位点对

基于剪接位点竞争机制,剪接位点对分成竞争性剪接位点对和非竞争性剪接位点对.并且竞争性和非竞争性剪接位点对的分类是一个很重要的工作.结合位置权重矩阵、离散量和支持向量机,提出了预测竞争性和非竞争性剪接位点对的新方法.独立检验集中90%以上的剪接位点对能被正确地分类成竞争性和非竞争性剪接位点对.此预测成功率高于其它方法.     

尊重、公平、发展——John G．Nicholls的教育观

综述了Nicholls的理论和实证研究所折射出来的教育哲学和教育观--对人的尊重,对公平的追求,对如何促进人的发展的理解和向往,并分析了其对教学与研究工作的启示和意义.     

万福液对皮肤刺激性和过敏试验

观察万福液对家兔皮肤的刺激性和过敏反应。用万福液对健康大耳白兔多次涂药,观察其对家兔完整皮肤和破损皮肤的刺激性;对大耳白兔多次涂药,观察其过敏反应。万福液对大耳白兔完整皮肤和破损皮肤无刺激性;对大耳白兔皮肤无局部过敏反应和全身过敏反应。万福液对皮肤无刺激性和过敏反应,是一种安全性较好的外用制剂。     

简析成语、名言在《马克思主义哲学》教学中的运用

运用中外通俗易懂的成语和名言警句对《马克思主义哲学》进行深入浅出、触类旁通的趣味教学和实践教学,从理论上提高青年学生对社会、对人生的科学认识,增强其对社会的辨别能力和对人生的驾驭能力。     

氯氟氰聚酯、乙羧氟草醚、苯醚甲·丙环对生物的毒性与安全性评价

参照中华人民共和国国家环保总局颁布的《化学农药安全评价试验准则》的方法,在室内测定了3种农药对蜜蜂、鹌鹑、斑马鱼和家蚕的机型毒性。结果表明:12.5%高效氯氟氰聚酯微乳剂对斑马鱼和家蚕是剧毒级,对蜜蜂和鹌鹑是高毒级;210%乙羧氟草醚乳油对斑马鱼是高毒级,对雌性鹌鹑是中毒级,对雄性鹌鹑是低毒级,对蜜蜂和家蚕是低毒级;330%苯醚甲·丙环乳油对斑马鱼和鹌鹑是中毒级,对蜜蜂和家蚕是低毒级。     

基于RANS法的B系列对转螺旋桨敞水性能数值模拟

应用RANS法研究B系列对转螺旋桨敞水性能,对单桨和对转螺旋桨进行数值计算,研究不同湍流模型对数值结果的影响,分析研究对转螺旋桨桨距比和直径比的参数匹配问题,比较对转螺旋桨和单桨的敞水效率,剖析尾流场的变化情况,突破传统势流理论方法无法计入黏性和微观流动机理难以分析和把握等局限.数值结果表明:RSM模型的数值精度较高,且选取桨距比和直径比合适的对转螺旋桨明显提高其推进效率,对转螺旋桨后桨能吸收前桨轴向速度和尾涡能量,减小切向速度对流体扰动的影响,增大流经桨叶的流体动量,减小前桨尾流外直径,增加螺旋桨的推力,提高对转螺旋桨推进性能,具有工程实用性.     

青海省农牧专业高校毕业生需求分析及对策研究

为了掌握青海省对农牧专业人才的需求和对高校毕业生专业、学历、素质和能力等方面的要求,项目组采用问卷调查的方法,对青海省用人单位的人才需求和对高校毕业生的要求以及订单培养等情况进行了调查和走访。调查结果显示:青海省用人单位对农牧专业人才有着迫切的需求,对青海大学农牧学院往届毕业生的能力素质和工作表现持肯定态度,同时也对在校大学生提出了更高的培养要求。通过调研得出,学校办学要以市场为导向,加强专业改革和学科建设的力度,重视实践教学,加强和改进就业和创业指导,努力提高大学生的综合素质和能力,以满足农牧人才的社会需求。     

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.     

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     

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