THE IMPROVEMENT OF THE GENERAL EXPRESSION FOR THE STRESS FUNCTION φ OF THE TWO-DIMENSIONAL PROBLEM

In this paper,it is pointed that the general expression for the stress functionφ_0 of theplane problem in polar coordinates is incomplete.The problems of the curved bar with anarbitrary distributive load at the boundries can’t be solved by this stress function.For thisreason,we suggest two new stress functions and put them into the general expression.Then,the problems of the curved bar applied with an arbitrary distributive load at r=a,bboundaries can be solved.This is a new stress function including geometric boundaryconstants.     

A mathematical theory of materials with elastic range and the definition of back stress tensor

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气相色谱-甲基化-α-D-甘露糖苷内标法测定变异黄芪中的苦马豆素

建立以甲基化-α-D-甘露糖苷为内标物,用气相色谱测定变异黄芪中苦马豆素的方 法。植物样品经甲醇超声提取、氯仿去除杂质后,将碱性正丁醇萃取物用硅烷化试剂进行 衍生化,通过AT.SE-54毛细管柱分离,氢火焰离子化检测器检测,测得变异黄芪干草粉中 苦马豆素含量为115.7 mg/kg,加标回收率为82.6%~94.0%,相对标准偏差为2.8%。该方 法能用于疯草样品中苦马豆素的含量检测。     

The improvement of the general expression for the stress function Φ of the two-dimensional problem

In this paper, it is pointed that the general expression for the stress function of the plane problem in polar coordinates is incomplete. The problems of the curved bar with an arbitrary distributive load at the boundries can’t he solved by this stress function. For this reason, we suggest two new stress functions and put them into the general expression. Then, the problems of the curved bar applied with an arbitrary distributive load at r=a,b boundaries can be solved. This is a new stress function including geometric boundary constants.     

A DIVIDED REGION VARIATIONAL PRINCIPLE OF A -Ω METHOD FOR 3-D EDDY CURRENT PROBLEMS

I.IntroductionTheanalysisoftheeddycurrentfieldisanimportantprobleJllintheelectromagneticinductionheatingandtheelcctronlagneticdesignoftheelectricmotorandthetransforlllcr.Chartetal.lllandSinlkinctal.c1tlrstsolvedtheeddycurrentproblemusingamagneticvectorpotentialAandanglcctricscillilrpotential(p(calledA,(Pnlcthod).Tllcn*Browlll3117rol,oscdT-Qmethodwhich"scsa1llilgllcticscalarpotentialandanelectricvectorpotelltial.I-orthet'initeelenlclltallalysis,Chillly1btisstudiedsystematicallythet'ullctiol…     

例说中考物理试题中的伪情境

: 通过对几个中考试题的分析, 说明有的试题设定的物理情境与客观事实或常理不符, 我们称为物理试 题伪情境. 本文强调物理试题表述的物理情境应生动、 直观, 有助于学生理解, 更应该让题目表述的情境符合客观事 实, 力求避免命制的物理试题出现伪情境.     

适度超前 服务市场 融合管理 助力国际化——东软专利管理工作经验谈

1991年,东软集团股份有限公司创立于东北大学,是中国领先的IT解决方案与服务供应商,公司主营业务包括行业解决方案、产品工程解决方案、软件产品与平台及服务等。目前,公司拥有员工18000余名,在中国建立了8个区域总部、16个软件开发与技术支持中心、5个软件研发基地，     

交流电路中白炽电灯是否闪烁的实验研究

用数码相机对准通白炽电灯的灯丝拍摄灯丝的发光情况,和用CBL系统测量出白炽电灯发光强度随时间变化的实验均说明,灯丝在交流电路中的亮度是基本稳定的,没有出现通常所说的明暗闪烁现象．     

工程坐标系的建立方法

根据工程测量中长度投影变形超过2．5cm／km时应建立地方工程控制网的要求，通过选择适当的坐标系统，有效地消除或减弱投影变形，以满足工程的实际需要。     

含孔von kármán板中的高次谐波散射现象

基于vonKarman板大挠度弯曲理论,利用谐波平衡法及小参数振动法,研究了含孔vonKarman板的非线性波散射问题．通过分析发现：由于弯曲应力与中面力的非线性耦合,vonKarman板中会出现高次谐波散射现象．