SolidWorks二次开发中的零件运动与变化研究

针对软件中模拟零件空间运动与模型特征变化的问题,提出了基于SolidWorks环境的零件运动与变化控制方法,该方法用三类参数方程组表示不同运动,并将各方程组离散化,用程序循环实现指定运动;而零件动态变化则可循环更改特征参数,并通过交替切换并列窗口实现。所提方法同时适用于点动与连续运动,并可引申用于多零件的联动、协作运动和变化与运动同时进行等复杂情况。依据所提方法设计折弯机器人离线示教系统,验证了该方法的有效性与实用性。

Effect of volume changes on complete deformation behavior of rocks

For the purpose of describing the deformation characteristics of rocks,the effect of volume changes on mechanical properties of rocks should be taken into account with relation to the development of constitutive model.Firstly,rocks are divided into three parts,i.e.,voids,a damaged part and an undamaged part in the course of loading.The void ratio was applied to describing the changes of voids or pores during the deformation process.Then,using statistical damage theory,a constitutive model was developed for rocks to describe their strain softening and hardening on the basis of investigating the relationship between the net stress and apparent stress,in which the influence of volume changes on rock behavior was correctly taken into account,such as the initial phase of compaction and the latter stage of dilation.Thirdly,a method of determining model parameters was also presented.Finally,this model was used to compare the theoretical results with those observed from experiments under conventional triaxial loading conditions.

光学符号识别

光学符号识别在电子设备上已经有广大的应用。本文对图像数据的分析,选取图像特征,图像字符识别进行了讨论,最后对模型进行评价和优化。针对问题二,首先利用去掉变化小的特征法,对字符在矩形区域的水平位置与竖直位置的数据做取值预处理,得到字符在矩形区域的水平位置与竖直位置的选取区间,从而确定判断识别字符的位相特征;然后再利用线性回归与正则化,以字符所在矩形区域的宽度与高度的数据,通过矩阵X和Y进行线性回归,得到压缩因子的有效自由度。