发展中国家企业的技术获取型FDI研究

南方(发展中国家)企业要在全球市场具有竞争力,技术优势是其获得强大市场地位的最有效的手段,而在北方(发达国家)进行技术获取型FDI将有助于南方企业更迅速有效地获取最新技术。通过构建南方企业在北方技术获取型FDI的数理模型,探讨了南方企业技术获取型FDI的可行性条件;并选择深圳华为公司进行相关实证分析,从微观上为企业对外直接投资行为提供了决策指导。     

基于动态系统的机器人模仿学习方法研究

针对当前机器人模仿学习过程中,运动模仿存在无法收敛到目标点以及泛化能力差的问题,引入一种基于动态系统（dynamical system,DS）的模仿学习方法。该方法通过高斯混合模型（gaussian mixture model,GMM）将示教运动数据建模为一非线性动态系统;将DS全局稳定的充分条件作为约束,以保证DS所生成的所有轨迹收敛到目标点;将动态系统模型的参数学习问题转化为求解一个约束优化问题,从而得到模型参数。以7bot机械臂为实验对象,进行仿真实验和机器人实验,实验结果表明:该方法学习的DS模型从不同起点生成的所有轨迹都收敛到目标点,轨迹平滑,泛化能力好。     

基于真实感图像生成原理的机织物外观模拟

总结了目前机织物CAD系统在机织物外观模拟方面存在的问题,提出了利用真实感图像生成的方法模拟机织物外观的新思路,并在充分考虑光照对模拟机织物外观效果的基础上给出了利用计算机模拟机织物真实感外观的原理、过程和结果。     

Integration of imitation learning using GAIL and reinforcement learning using task-achievement rewards via probabilistic graphical model

The integration of reinforcement learning (RL) and imitation learning (IL) is an important problem that has long been studied in the field of intelligent robotics. RL optimizes policies to maximize the cumulative reward, whereas IL attempts to extract general knowledge about the trajectories demonstrated by experts, i.e, demonstrators. Because each has its own drawbacks, many methods combining them and compensating for each set of drawbacks have been explored thus far. However, many of these methods are heuristic and do not have a solid theoretical basis. This paper presents a new theory for integrating RL and IL by extending the probabilistic graphical model (PGM) framework for RL, control as inference. We develop a new PGM for RL with multiple types of rewards, called probabilistic graphical model for Markov decision processes with multiple optimality emissions (pMDP-MO). Furthermore, we demonstrate that the integrated learning method of RL and IL can be formulated as a probabilistic inference of policies on pMDP-MO by considering the discriminator in generative adversarial imitation learning (GAIL) as an additional optimality emission. We adapt the GAIL and task-achievement reward to our proposed framework, achieving significantly better performance than policies trained with baseline methods.     

基于VB6．0和UG6.0的盘形凸轮机构CAD系统设计

利用面向用户的可视化软件Visual Basic 6．0和UG 6．0进行盘形凸轮机构CAD系统设计。输入原始参数后,得到该参数下的凸轮廓线、机构运动分析及运动仿真,大大缩短解析法设计凸轮廓线时数据处理时间,为高速高精度凸轮机构的设计、制造和检测提供了有利条件。使凸轮机构的设计直观化、实时化。通过实例验证,该软件界面友好,方便直观,既可用于工程实际,又可满足教学需要。     

基于VB6.0的盘形凸轮机构CAD系统设计

利用面向用户的可视化软件Visual Basic 6.0进行盘形凸轮机构CAD系统设计。输入原始参数得到该参数下的凸轮廓线及有关数据,缩短了解析法设计凸轮廓线时数据处理时间,提高设计工作效率,使凸轮机构的设计直观化、实时化。通过实例验证,该软件界面友好,方便直观,既可用于工程实际,又可满足教学需要。     

Understanding action beyond imitation: Reversed compatibility effects of action observation in imitation and joint action.

A robust finding in imitation literature is that people perform their actions more readily if they are congruent with the behavior of another person. These action congruency effects are typically explained by the idea that the observation of someone else acting automatically activates our motor system in a directly matching way. In the present study action congruency effects were investigated between an imitation task and a complementary action task. Subjects imitated or complemented a virtual actor's grasp on a manipulandum. In both tasks, a color-cue could be presented forcing subjects to ignore the task rule and execute a predefined grasp. Reaction times revealed a reversal of congruency effects in the complementary action task, suggesting that subjects were able to circumvent the automatic tendency to copy actions or postures of another person. In 2 additional control experiments, congruency effects were replicated, and a Simon effect was identified to underlie faster responses in the imitation task. These results make a case against current theoretical views on imitation and direct matching in favor of more flexible models of perception-action coupling. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

凸轮曲线逆向测绘研究

常用的凸轮零件在试制和维修时会涉及到凸轮曲线生产和凸轮零件的仿制问题,文中主要介绍了一种基于逆向理论的凸轮运动曲线测绘方法,并设计研制了一套用于测绘及设计凸轮曲线的系统。系统利用仿形法进行数据采集,然后对数据进行处理,从而获取生产凸轮原始点云参数,最后进行曲线拟合和精度补偿以实现凸轮曲线。测绘方法在凸轮设计和维修仿制方面具有重要意义。     

无氰铜-锌-锡合金电镀工艺的研究

介绍了一种新型的无氰铜-锌-锡合金电镀工艺。确定了该工艺的最佳配方为:Sn2+1.5~2.0g/L,Cu2+6.5~8.5g/L,Zn2+3.8~5.0g/L,DS6008A400~600g/L,DS6008B200~300g/(kA·h),25~35℃,pH值6~7,0.4~0.8A/dm2。同时对镀液性能和镀层性能进行了测试。     

砂壁状建筑涂料性能特征和仿外墙面砖施工技术

从涂膜装饰效果、应用范围、施工方法、生产成本等方面介绍砂壁状建筑涂料的性能特征;从涂料性能的改善与提高、新品种涂料的开发、涂料应用范围的扩展和施工方法的发展等方面介绍砂壁状建筑涂料近年来的发展。仿外墙面砖施工技术是该类涂料施工方法的重要进展。使用这种施工方法得到的涂膜装饰效果极好,该方法工艺简单、易于操作实施,有推广应用价值。