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Abstract: A general solution of the differential equation for transverse displacement function of orthotropic rectangular thin plates in free vibration is presented in this paper.
中文意思:
文摘:本文建立了正交异性矩形薄板自由振动横向位移函数微分方程的一般解。


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Abstract: A fall accident of three staffs going by cage at an auxiliary shaft of a mine is analyzed, and the preventive countermeasures are put forward.文摘:对某矿副井发生的一起3名乘罐人员坠井事故进行了分析,并提出了预防措施。
Abstract: A fast drag system is designed to simulate the law of speedvariations of a certain power system engine in the process of its start by means of electric power drag and the theory of automatic control and through adopting a new type of electric ma文摘:运用电力拖动与自控理论,采用新型电机及变频技术,设计一种快速拖动系统借以模拟某动力系统发动机启动过程转速变化的规律,使该系统能够达到快速启动,瞬间制动,精确跟随事先设定的电机转速变化曲线的目的。
Abstract: A feasibility of the carrying-out of digital libraries in our country is discussed in this paper on the ground of the building-up of C hina's information inrfrastructures,the development of library's automaization and the construction of digital文摘:从国家信息基础设施建设、图书馆自动化发展现状、进行中的数字图书馆项目情况几个方面加以分析,探讨了我国实施数字图书馆的可行性问题,并针对我国的实际情况,提出了发展数字图书馆必须加快信息基础设施的建设与改造、完善图书馆自动化的标准化等对策.
Abstract: A fuzzy and random method for estimating the three parameters ofWeibull distribution was put forward.The method was tested and verified by the random samples obtained by Monte Carlo method.And the results showed that the estimating values of the文摘:提出了威布尔分布三参数估计的模糊—随机方法,并对蒙特卡罗方法产生的随机样本进行了验证;结果表明,求得的参数估计值十分接近理论值。
Abstract: A general BPM simulator for optical waveguides is presented in this paper.This system includes three tools:the effective refractive index calculation tool, the waveguide mode solution tool,and the beam propagation method simulation tool.This sys文摘:介绍了一个光波导器件计算机辅助分析系统,该系统集成了3个实用工具:光波导有效折射率计算工具,光波导模式求解工具和三维复折射率全矢量有限差分束传播法模拟工具.本系统用于线性波导器件,模拟光在波导中的传播过程,从而可以优化设计波导器件,探索新结构器件.
Abstract: A general solution of the differential equation for transverse displacement function of orthotropic rectangular thin plates in free vibration is presented in this paper.文摘:本文建立了正交异性矩形薄板自由振动横向位移函数微分方程的一般解。
Abstract: A great deal test data is obtained by scientific and systematicsimulation technics examination. The table and database of operating parameter of mould ECM is established.文摘:通过系统、科学的模拟工艺试验,获取了大量试验数据,建立了模具电解加工工艺参数表,并进一步创建了模具电解加工工艺参数数据库。
Abstract: A group of phase shifting algorithms is derived by the method of undeterminedcoefficients (UCM).The unknown coefficients are set in a general algorithm expression,and then solved by adding bonding equations according to error compensation requir文摘:提出了一种以误差补偿为目的的新的相移算法设计方法—待定系数法,该方法首先在算法表达式中引入一系列待定参数,根据对误差补偿的要求提供约束方程,从而解出这些未知参数.待定系数法使得算法设计和误差分析是同时进行的,改变了以往先设计算法再进行误差分析和评价的过程,由待定系数法导出的相移算法对算法设计中所考虑的误差源具有良好的补偿性能.
Abstract: A heuristic scheduling approach based on the characteristics of concurrent activities in product developing process is presented.文摘:针对并行工程产品开发过程中的活动规划问题,提出了一种启发式的规划方法。
Abstract: A high performance liquid chromatography (HPLC) method for determing the 2,4-/2 ,6- isomer ratio in commercial. toluene diisocyanate (TDI) was developed.文摘:建立了测定工业甲苯二异氰酸酯中2,4-和2,6-体异构比的液相色谱法。
Abstract: A improved method using simple instrument to expand Gaussian distribution light field and get large-range homogeneous ideal light field was presented.An optical setup used to expand Gaussian distribution light field was designed to improve the u文摘:提出采用简单器件,将高斯分布光场经再扩展,获得大范围均匀的理想光场的方法;设计了对高斯分布光场再扩展光路,并提高散射光场光能的利用率,取得良好的实验效果。
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