关于最优化数学教学过程的控制

数学教学过程的最优化是指教师选择、设计的教学方法能保证在规定的时间内,使数学教学任务的解决达到可能范围的最大效果。针对目前在教学目标和教学内容确定之后,教学方法就成了提高质量的关键因素。本文通过教学内容控制、量度控制、事态控制、变量控制来最优化数学教学过程的控制。     

供应链管理中的联合库存控制

如何设置和维持一个合理的库存水平，以平衡存货不足带来的短缺风险和损失，以及库存过多所增加仓储成本和资金成本成为一个企业必须回答的问题。通过比较各种库存控制模型，结合实际工作中所碰到的库存控制问题，吸收并应用供应链管理下多级库存、联合库存等控制方法。提出库存控制的最优化目标不仅是供应链环节中某一个或几个节点企业的库存最优化，而是整个供应链环节有机、协调地一体化库存的最优化。     

控制系统的最优控制问题

最优控制理论研究的对象是控制系统，中心问题是给定一个控制系统，怎样选择控制规律，使系统在某种意义上是最优的．文章提出了最优化问题并对最优化的性能指标给出了统一的、严格的数学方法，为工程人员设计带来极大方便．     

结构被动控制的体系优化研究

本文研究结构被动控制的体系优化问题，在探讨其系统化模式、最优化求解和分层结构化分析的基础上，通过算例阐明结构被动控制体系优化的理论意义和应用价值。     

论最优化体育教学过程的设计

体育教学是以学生为对象，由多因素组成的有秩序、有计划组成的可控制的教学动态系统。在这系统中，任何环节的运用或某一知识技能的撑都是在一定时间里一定阶段按一定的秩序表现出来的。根据体育教学的客观规律，可把整个体育教学过程划分为：储存阶段、传输阶段、使用阶段和反馈阶段，并对这四个阶段进行最优化体系的设计和调控，使每一阶段都达到最优化，这样，体育教学过程才可达到最优化，从而取得最佳的教学效果。     

基于四元数算法的舰船姿态角最优控制

为实现舰船姿态角控制效果的最优化，将四元数算法和最优控制理论有机的结合，构造哈密顿函数，得出了适用于舰船姿态角控制的数学模型。仿真结果表明该方法具有良好的控制效果。     

如何有效的控制工程投资

要完整有效地控制工程造价,并及时纠正工程建设中不能发生的偏差,取得投资效益的最优化,就必须对工程造价的三个阶段实施全过程控制:①项目决策阶段的投资控制;②项目设计阶段的投资控制;③项目实施阶段的工程投资控制。     

简述工程项目成本控制

加强工程项目成本控制已成为工程施工企业管理者的共识。施工企业的最终目标是经济效益最优化。以项目管理的实际,从人员队伍选择和内部管理层面提出了具体措施。     

浅谈合理控制城市轨道交通工程造价

对城市轨道交通项目工程造价的构成及投资影响因素进行了分析,指出控制轨道交通工程造价的关键点在于合理控制建筑工程费、安装工程和设备购置费、车辆购置费3项主要的费用;并提出了设计方案的技术经济比选和实行限额设计控制轨道交通工程造价的有效措施,以达到设计方案最优化、投资控制合理化的目的。     

一种基于CARMA模型的直接预测控制算法

预测控制一般都建立在输出预测模型基础上，以一个最优化性能指标来求解未来的控制量，使得求解过程变得复杂。介绍一种基于CARMA模型的直接预测控制算法，并对其控制量进行了反馈校正和滚动优化，从而使得求解过程变得简便、快捷。     

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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