基于尺度赋权方差的有偏总体EWMA均值控制图

基于尺度赋权方差法给出总体分布有偏并假定总体分布未知情况下休哈特均值控制图的控制限.基于此研究结果,将其推广到EWMA均值控制图,给出总体分布有偏并假定总体分布未知情况下EWMA均值控制图的控制界限,并以质量特性值服从对数正态分布为例,给出EWMA均值控制图的控制效果的模拟分析.     

微粒的运动随机性对其光散射频谱的影响

本文针对提高粒度仪的精度问题 ,从理论上较系统地研究了真实情况下被测微粒的动态随机性 (高斯光敏区内微粒速度分布、跟随性、位置分布、空间取向等动态随机性 )对Mie散射光谱的破坏作用 ,从而指出这种作用是目前影响粒度仪精度提高的主要原因。     

Synthesis and metal complexation of dihydroxyphosphino‐functionalized crosslinked styrene/maleic anhydride copolymers

Crosslinked styrene (St)/maleic anhydride (MA) copolymers were synthesized, hydrolyzed with dicarboxylic acid, and converted to bear dihydroxyphosphino functionalities. The St–MA copolymers were prepared by azobisisobutyronitrile‐initiated polymerization in toluene at 90 °C in the presence of 2, 10, or 20% divinylbenzene crosslinker. The MA moiety was hydrolyzed into dicarboxylic acid to improve the hydrophilicity of the copolymers. The phenyl ring of St was phosphorylated with phosphorus trichloride in the presence of aluminum chloride and then hydrolyzed and oxidized with nitric acid at room temperature. The structures of the hydrolyzed and dihydroxyphosphino‐functionalized copolymers were confirmed by Fourier transform infrared spectroscopy and elemental analysis. The complexation behavior of these functionalized copolymers toward metal ions in 25 ppm aqueous solutions was observed over time periods of up to 7 h. The adsorption toward Pb(+2) was highest, followed by those of Cu(+2), Cr(+3), and Ni(+2). On the dihydroxyphosphino‐functionalized St–MA (20% divinylbenzene) copolymer, the adsorption of Pb(+2) showed a linear relationship with the concentrations and fit the Langmuir isotherm. The kinetics of Pb(+2) adsorption on this dihydroxyphosphino‐functionalized copolymer also fit the rate equation of the moving boundary model, t = [1 ? 3(1 ? X)^2/3 + 2(1 ? X)], where X is the fractional conversion. The metal‐ion adsorption kinetics of this copolymer appeared to be particle diffusion control, in which the moving boundary advanced from the surface toward the center. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 92–101, 2004     

The Application Model of Moving Objects in Cargo Delivery System

Consider a database that represents and manages the information about moving objects and their locations such as the material delivery system, the communication is vital and constant among the database (delivery center), the moving objects (the material on road) and database application users (the owner of the material). We need to establish the new model for moving objects such as location model, indexing, dynamic attributes, spatial and temporal query, etc. in database management system (DBM…     

Existence and uniqueness of solutions of elastic string with moving ends

A mathematical model for the small vibration of an elastic string is considered. The model takes into account the change of tension due to the movement of the end points of the string. Under the assumptions that the speed of the moving ends be less than the characteristic speed of the equation, the existence and the uniqueness of local weak solution and global strong solution are proved. Copyright © 2004 John Wiley & Sons, Ltd.     

一种适于高速充电的新型化学电源电极的研究

本文提出一种适于高速充电的新型化学电源电极，该电极体系在充电时，反应界面能迅速推移，使活性物质能迅速沉积在三维载体电极上，特别适用于强电流高速充电。充电时活性物质以固态沉积在电极表面，而放电时活性物质又溶解为液态。电极体系在充放电循环过程中活性物质是以固（态）－液（态）循环形式进行循环，因而可以保持新鲜的电极表面，防止固体电极表现活性物质的相变、脱落、变形等弊端，有利于延长电极的寿命，该电极体系可     

双盘靶等离子体运动和X光辐射

通过双盘靶实验我们观察到了等离子体的运动，运动速度小于３．５×１０７ｃｍ／ｓ；同时观测到了等离子体的会聚发射，Ｘ光的波段约在４００～７００ｅＶ之间，峰值能量在５００～６００ｅＶ之间。     

多功能图象实时监视器

介绍了多功能图象实时监视器的硬件结构,软件设计及技术性能;本监视器在遥感飞行、地面回放、实时传输和新一代成象光谱仪器中均得到了成功的应用.     

基于自回归移动平均模型的图像模糊消除并行稳定机制研究

为了克服图像模糊消除算法不稳定与解模糊等难题,保证复原图像的细节信息清晰完整; 并提高算法的运行效率,获取实时性,本文提出了神经网络融合自回归移动平均模型的图像模糊消除并行稳定机制。引入神经网络,基于突触权重系数,构造激活函数;再嵌入人工蜂群算法（ABC- Artificial Bees Colony）,并以神经网络的均方误差函数设计适应度方程,由ABC算法训练神经网络,利用优化后的神经网络来获取自回归移动平均模型的参数;再将自回归移动平均优化模型引入模糊图像,以同时识别模糊函数与模糊图像;并对模糊函数进行相关定义,以消除算法不稳定性与解模糊问题;再对模糊图像进行反卷积,消除模糊。借助仿真实验来测试本文机制的相关性能,结果表明：与其他模糊消除算法相比,该机制的运行速度更快,时耗最短;且本文机制更稳定,模糊消除效果更好,复原图像的细节信息清晰可见。     

基于α-β-γ滤波的迫击炮定位

针对迫击炮的侦察定位问题,介绍了一种基于α-β-γ滤波的定位方法。该方法首先根据外弹道学确定弹丸飞行的质心运动方程,然后利用常增益的α-β-γ滤波跟踪求解弹丸的运动参数,最后通过龙格-库塔( Runge-Kutta)方法求解质心运动方程,并外推求得炮位位置。仿真结果表明,该方法在保证较高迫击炮定位精度的同时实时性能较传统方法大幅提升,有显著的工程意义。