二维不规则形状自动排料算法的研究与实现

针对二维不规则形状自动排料问题,给出了解决自动排料的求解思路,并对自动排料的主要算法作出了研究和改进,以便更好地提高算法效率及可靠性。     

无机氯化物熔盐在乏燃料干法后处理中的应用进展

综述了无机氯化物熔盐在乏燃料后处理中的应用进展,主要介绍了LiCl-KCl熔盐在金属乏燃料中的电解精炼和熔剂萃取、LiCl-Li2O在金属氧化物或混合金属氧化物（MOX）乏燃料中的电化学还原及NaCl-2CsCl在氧化物乏燃料电化学沉积中的应用进展。展望了中国无机氯化物熔盐在干法后处理中的应用前景及发展方向。     

Estimation of Road Friction Coefficient in Different Road Conditions Based on Vehicle Braking Dynamics

The accurate estimation of road friction coefficient in the active safety control system has become increasingly prominent. Most previous studies on road friction estimation have only used vehicle longitudinal or lateral dynamics and often ignored the load transfer, which tends to cause inaccurate of the actual road friction coefficient. A novel method considering load transfer of front and rear axles is proposed to estimate road friction coefficient based on braking dynamic model of two-wheeled vehicle. Sliding mode control technique is used to build the ideal braking torque controller, which control target is to control the actual wheel slip ratio of front and rear wheels tracking the ideal wheel slip ratio. In order to eliminate the chattering problem of the sliding mode controller, integral switching surface is used to design the sliding mode surface. A second order linear extended state observer is designed to observe road friction coefficient based on wheel speed and braking torque of front and rear wheels.The proposed road friction coefficient estimation schemes are evaluated by simulation in ADAMS/Car. The results show that the estimated values can well agree with the actual values in different road conditions. The observer can estimate road friction coefficient exactly in real-time andresist external disturbance. The proposed research provides a novel method to estimate road friction coefficient with strong robustness and more accurate.     

交互式遗传算法的机器代替用户方法

如何让无疲劳的计算机代替易疲劳的用户是交互式遗传算法研究的一个重要内容.本文首先研究了机器代替用户的3个基本内容,即,机器代替用户扮演环境角色,对个体进行评价;机器采样和代替用户的时机是进入偏好稳定阶段;机器寻优结果由样本和代替用户策略决定.其次,给出基于基因意义单元"适应值"估计的个体适应值估计方法.最后,通过比较实验验证了本文方法的有效性.     

Influence Analysis of Machining and Installation Errors on the Radial Stiffness of a Non-Pneumatic Mechanical Elastic Wheel

Machining and installation errors are unavoidable in mechanical structures. However, the effect of errors on radial stiffness of the mechanical elastic wheel(ME-Wheel) is not considered in previous studies. To this end, the interval mathematical model and interval finite element model of the ME-Wheel were both established and compared with bench test results. The intercomparison of the influence of the machining and installation errors on the ME-Wheel radial stiffness revealed good consistency among the interval mathematical analysis, interval finite element simulation,and bench test results. Within the interval range of the ME-Wheel machining and installation errors, parametric analysis of the combined elastic rings was performed at different initial radial rigidity values. The results showed that the initial radial stiffness of the flexible tire body significantly influenced the ME-Wheel radial stiffness, and the inverse relationship between the hinge unit length or suspension hub and the radial stiffness was nonlinear. The radial stiffness of the ME-Wheel is predicted by using the interval algorithm for the first time, and the regularity of the radial stiffness between the error and the load on the ME-Wheel is studied, which will lay the foundation for the exact study of the ME-Wheel dynamic characteristics in the future.     

中国特色社会主义理论与实践 --浅析国有企业的改革

本文从当前国内外的形势出发,分析了构建和谐社会进行国企改革的必要性、紧迫性,阐述了国有企业改革的目标,及国有企业改革的种种举措。最后就国有企业在改革的过程中出现的众所周知的大量工人下岗的社会问题提出了一些看法。     

交互式进化计算的适应值噪声及收敛鲁棒性

噪声是影响进化计算(evolutionary computation,简称EC)算法性能的一个重要因素.对于传统EC中的噪声,已有许多研究成果,但交互式进化计算(interactive evolutionary computation,简称IEC)的噪声研究成果却较少.首先回顾了传统EC中噪声的定义、来源、类型及各种处理噪声的方法;其次,从IEC的理性用户观点出发,研究了IEC的适应值噪声及收敛鲁棒性.其中,空间的映射关系、个体间的占优关系以及IEC的收敛等是研究收敛鲁棒性的两个定理(强条件定理和弱条件定理)的基础.这两个定理表明,理性用户条件下的噪声不会影响算法全局收敛性.在这两个定理的基础上进一步得出了如下结论:有效的适应度尺度变换是弱条件定理的一部分,IEC中\"真\"适应值是用户偏好等.并以不满足弱条件定理,即破坏算法收敛性为依据,给出了IEC中适应值噪声的狭义定义.实验进一步验证了这两个定理.上述结论为进一步研究IEC作了必要的铺垫.