可控元件──磁粉离合器的性能与应用

本文介绍了磁粉离合器作为控制元件的优良性能，介绍了磁粉离合器在恒张力、无级调速、位置伺服、缓冲起动等领域中的应用，指出了其主要结构、参数对控制性能的影响，论述了其良好的应用前景。     

数据包络分析中有效单元的进一步分析

本文从多目标Ｐａｒｅｔｏ有效解入手，分析了ＤＥＡ模型最优解与有效单元间的关系，定义了一个能衡量单元有效程度的指标，并在此基础上对单元问题的相对有效程度作了进一步探讨，最后给出了一个计算实例。     

信号参数的逆估计

在输入信号线性独立反模拟滤波器有限集的基础上获得了维纳滤波器的权重函数；提出了多项反函数情况下估计数字滤波器的有效结果。     

LiCr0.10Mn1.90O4粒径分布对倍率放电性能的影响

以不同粒径LiCr0.10Mn1.90O4为活性物制备电极，与对电极锂片装配成模拟电池后进行电化学性能研究。结果表明，随着LiCr0.10Mn1.90O4O粒径的增大，锂离子传输困难与JahnTeller畸变导致其倍率充放电性能逐渐下降。兼顾到活性物的填充性能，选择粒径大约10μm的活性物较为适宜。     

Pollen carryover and neighbourhood inRanunculus bulbosus

The pattern of gene flow has a major influence on the spatial scale of evolutionary processes. In plant populations pollen carryover will influence the pattern of gene flow. InRanunculus bulbosus L. pollen carryover was found to occur over a maximum of 5 flowers, with seed set per flower decreasing in a curvilinear fashion with increasing visit number in a sequence of visits by a bee after pollen pick-up from a donor plant. The effect of pollen carryover is to increase both neighbourhood area and neighbourhood size by two-fold.     

分布式电源中最佳蓄电池容量的机会约束规划

为解决分布式电源中最佳蓄电池容量的计算问题，提出了电池容量优化机会约束规划的教学模型。在分析决定电池容量的关键因素和分布式电源中风能、太阳能以及用户负载随机特性的概率模型基础上，将电池容量的最优化问题归结为机会约束规划问题，得到了优化计算的教学模型，并应用遗传算法，结合随机模拟技术求解，得到了最佳电池容量。实例计算表明该方法是有效的。     

粒子通过管道的尺寸效应

研究粒子和管道的特征长度,分析粒子穿过管道的过程,以探讨粒子与管道相互作用的尺度效应.在此过程中,采用粒子覆盖管道截面和粒子填充管道空间的方法,推导出截面覆盖度和管道体积填充度的关系式,计算球形粒子通过圆形管道的相关参数.研究结果表明:当管口直径D略小于粒子直径d的2倍时,截面覆盖度最小为25%;当管口直径大于粒子直径的2倍后,覆盖度有大有小,但总的趋势是,随着粒子的直径减小,覆盖度增加;D/d的数量级为102时,覆盖度为86.5%,但当D/d的数量级为105时,覆盖度仍小于90%;在D/d→∞时,覆盖度趋向于1;体积填充度与面积覆盖度具有相似的变化趋势;管口的倒角效应随着D/d的变化而变化,D/d越小,管口的倒角效应越明显.     

颗粒在水轮机转轮内的运动轨迹研究

根据颗粒在流场中的受力公式,推导出了低Re下颗粒在水轮机各通流部件上绝对运动的运动轨迹通解方程及高Re下的轨迹计算方程.在采用相对坐标的基础上,推导出了颗粒在水轮机转轮内的运动轨迹方程.还计算了不同颗粒在水轮机转轮内的运动轨迹.     

Simulation of sub-micron particle formation and growth during combustion processes

Sub-micron particle formation and growth during combustion processes is very complex because of its strong uncertainty and randomness. A model to simulate the sub-micron particle formation and growth during the combustion process is developed based on the gas kinetic theory and is expressed by the vapor concentration changes and particle loading changes, which reflects effect characteristics of different mechanism (nucleation, condensation and coagulation) in particle formation processes. The developed characteristic time is used to token the three mechanisms. It is thought that environmental temperature and pressure, vapor temperature and critical pressure are important factors influencing the sub-micron particle formation and growth. The sub-micron particle formation processes under different conditions are studied and the effect characteristics of these mechanisms are analyzed, which show that the nucleation, condensation,and coagulation occur simultaneously during the sub-micron particle formation and growth process. Nucleation contributes to the sub-micron particle formation, while condensation and coagulation is helpful to the growth of the particle size.     

水热合成莫来石超细粉粒子稳定性的研究

研究了水热合成莫来石超细粉粒子的稳定性;考察了乙醇溶剂置换、三乙醇胺改性及真空干燥方法对莫来石超细粉粒子在干燥、储存过程中的团聚的影响.得出改性剂三乙醇胺能有效地抑制莫来石超细粉粒子在干燥、储存过程中的团聚,提高粒子的稳定性.采用乙醇进行溶剂置换,也可以抑制莫来石超细粉粒子在干燥过程中的团聚,并改善其储存稳定性.真空干燥方法可以减轻莫来石超细粉粒子在干燥过程中的团聚.