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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
中文意思:
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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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。
Abstract: A large planar microphone array,which consists of 111 microphones,was successfully applied to obtain a two-dimensional mapping of the sound sources on a landing aircraft.The focus of study in this paper is on the landing gear noise source.The sp文摘:应用由111个传声器组成的平面传声器阵列对当前流行的民用客机进场着陆过程中的机体噪声源进行了实验测量,本文对七架窄体客机和七架宽体客机的起落架噪声进行了分析,得到了起落架噪声的频谱特性、指向特性和声级变化.研究发现,起落架噪声的频谱是由宽频随机噪声与一些较为明显的单音噪声源组成,起落架噪声的指向性类似于一个水平放置的偶极子.不同飞机起落架噪声的声级相差较大,这说明可以通过重新结构设计降低起落架噪声。
Abstract: A laser damage facilities,which has mm size spot and operates in TEM00 mode, were achieved.In order to know the reasons of laser damage,the laser energy density was controlled near the damage threshold of the oxide thin films.According to the ex文摘:采用毫米量级大光斑的近单模的激光器,控制入射薄膜表面的激光能量,获得了几种常见单层膜和增透膜的损伤形貌,实验结果表明,薄膜的损伤可区分为熔化型和应力型两种,薄膜表面等离子体对损伤斑点的扩大有重要作用。
Abstract: A liquid level/temperature display alarming system consisting of transmitter, water column display alarming device, temperature sensing elements and temperature display device is introduced.文摘:介绍一种以变送器、液位光柱显示报警仪、热敏元件及温度数显仪组成的液位/温度测量显示报警系统。
Abstract: A locking-based concurrency control scheme fo r object-oriented databases(OODBs) was presented.文摘:讨论面向对象数据库中的1种基于锁定的并发控制模式。
Abstract: A mathematical model describing the effect of flow nonuniformityon the performance of compact heat exchanger is provided,which is based on that one side of heat exchanger is uniformly distributed but the other is of maldistribution.The model may文摘:以一侧流体分配不均匀的换热器模型为基础,建立了物流分配不均匀性对换热器效能影响的数学模型,通过理论分析和计算,为研究换热器内部物流分配不均匀对其效能的影响提供了一种分析方法.该理论模型包括连续模型和离散模型2种形式,前者为研究物流分配不均匀引起换热器效能的下降提供了一种分析计算方法,后者为控制实验研究的精度提供了理论依据.研究结论对换热器的优化设计具有重要意义.
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