Abstract:对双对称矩阵，给出了一系列的特征值估计，利用其特殊的性质，通过降阶大大减少了计算工作量。

Abstract:在模糊拓扑空间中探讨了ｍ－紧与一些“好的推广”的紧之间的关系，并研究了ｍ－紧与分离公理之间的联系。

Abstract:We discuss the Rota's problem on the remaindes estimates of generalized Taylor's formula of delta operator with order n ,and obtain two estimates of remainder in the case of simple real roots.

Abstract:By the use of a singular function,the differential equation of vibration of a uniform circular shaft with several disks is found.By means of a symbol of operation,the analytical expressions of the frequency equation and the modal function are derived.Furt

Abstract:By solving the nonlinear dynamic differential equations in perfect elastic collision process between a ball and a bar rotating about a fixed axis,this paper deals with the transformation of the kinetic energy and the potential energy of compressive deform

Abstract:在１，８－二氮双环〔５．４．０〕－７－十一烯存在下，２，４－二叔丁基－６－甲氧基苯膦和硒反应得到一个新的磷－硒环状化合物，研究了该化合物的热反应。它与酰胺反应以较好的产率给出相应的硒代酰胺。

Abstract:The thermal decomposition of asparamide has been studied by DTA,TG method.The overall mechanism finished by two steps,the first at about 390 K,the second at about 519 K.The W.L(%) was 17.58 % and 38.60 %respectively.The products of different stages have b

Abstract:介绍了活塞环全数控加工ＣＡＤ系统的设计思想，系统以弹性力学和数学方法为基础，能根据活塞环参数与计算模型自动生成活塞环全数控机床数控加工所需的精确的接口数据，并能显示活塞环的外形曲线、压力分布图、数控机床伺服电机性能图及其它工艺文件，系统操作简便，实用性强，应用面宽。

Abstract:A mechanical chopper Q-switched CO 2 pulse laser unit with output of high pulse repetition rate,high pick power,short pulse length,moderate average power and good lean quality has been developed to meet the special demands for matarials processing.

Abstract:利用容栅位移传感器和单片机系统解决了液压万能材料试验机数据的自动是显示与自动绘图问题，结果表明：该系统具有测试工作效率高，测试数据准确可靠，数据不丢失，能精确绘图等特点。

Abstract:主要介绍了采用现代ＰＬＣ的大中型柴油发电机的励磁控制系统，介绍了其励磁控制部分的原理结构，控制算法（ＦＵＺＺＹ－ＰＩＤ）的原理，介绍了ＦＵＺＺＹ－ＰＩＤ双模控制算法在励磁控制系统中的应用及其仿真结果。

Abstract:It is important to modernize management of grain storage to automatic measuring and intelligent information processing.This paper introduces the basic constructor of expert system for integrated test of grain depot,presents multsensor management of the sy

Abstract:提出了用单ＣＣⅡ－实现二阶电流模式滤波器的新电路，仅用少量元件，即能实现二阶低通、带通滤波函数。电路用Ｐｓｐｉｃｅ程序进行了仿真。该电路具有电路简单、集成方便，无源灵敏度低等优点。

Abstract:This system realizes the collection,transmission and data processing of earthquake wave signal by means of delta modulation,frequency-shifting keying,frequency-division multiplexing technologies.Its circuit has the advantages of simplicity of architecture

Abstract:在Ｖｏｌｔｅｒｒａ级数和非线性转移函数理论的基础上，介绍了一种递推算法，可以在任意精度内由两个非线性代数方程（由决定方程产生）求得非线性振荡器的近似正弦波的同值与频率。该法既保留了谐波平衡分析法、描述函数法和平均法的许多期望的特性，而且以技巧上与经典的Ｋｒｙｌｏｖ，Ｂｏｇｏｌｉｕｂｏｖ及Ｍｉｔｒｏｐｉｓｋｙ等方法有类似之处，但比它们简便。与常规方法不同之处还在于本法对系统的非线性度和振荡的幅值无严

Abstract:提出用Ｕδ标幺值系统来构造汽轮发电机基本参数数学模型，从而用汽轮发电机基本参数数学模型进行参数辨识时转子侧电流、电压的基值选择与待辨识参数ｘａｄ，ｘａｑ无关，并减少了两个待辨识参数ｘａｄ，ｘａｑ，这有利于改善算法的收敛性，提高收敛速度，利用此基本参数数学模型成功地对一台２００ＭＷ汽轮发电机进行了参数辨识。

Abstract:The design of circuit for eight-channel data acquisition is introduced in this paper.It resolves some common questions in data acquisition such as time division choosing channel,automatic triggering,programmable gain amplifying,programmable filtering etc.

Abstract:引进子结构技术，将塑性区的截面离散建立在砼多轴弹塑性硬化松驰本构模型基础上，采用屈服面理论，提出了分段截面离散的屈服面模型法，计算分析表明，理论分析与实验结果吻合良好，可用于研究压、双弯、扭柱的空间非线性分析。

Abstract:The stress variation and ultimate stress of UPS in 19 UPC frames under vertical or horizontal cyclic loadings has been discussed.The principal factors affecting ultimate stress of UPS such as types of loading,transverse steel ratio of existing hoops,compo

Abstract:This paper presents an analysis method more universal and accurate for reinforced concrete(RC) crossed beam on elastic foundation by means of finite element method(FEM).Analysis problem of non-orthogonal foundation beam of reinforced concrete is resolved.

Abstract:Among the research of building and related technologies,energy conservation is a very important issue nowadays.In China,building energy research has been focused on the study of building envelopes and materials,rather than HVAC system.Building energy simu

Abstract:采用铁屑／炭反应器－混凝沉淀工艺处理某电镀厂规模为４ｍ＾３／ｈ的电镀混合废水，研究了反应器机理和工艺条件，废水经处理后，总Ｃｒ及Ｃｒ＾６＋去除率达９９％以上，其他重金属去除率达９５％以上，处理水水质达到《污水综合排放标准》９ＧＢ８９７８－９６）中的一级标准，无二次污染。该工艺与传统的化学法相比，具有工艺简单、占地少、投资及处理费用低、泥渣量少、操作方便的优点。