基于金属板材数控渐进技术的汽车座椅成形工艺

金属板材数控渐进成形工艺不需要专用的模具,是一种柔性的成形工艺.在工艺规划中,通过零件的数字模型来调节成形工具的运行轨迹,达到渐进成形零件形状的目的.由于汽车座椅形状复杂,金属板材渐进成形较困难.本文对其数控渐进成形工艺进行了分析,提出由建模、工艺分析、轨迹生成、HrpDSF处理、安装定位、加工润滑、后处理等组成的金属板材数控渐进成形工艺规划方法,成功地应用于汽车座椅的数控渐进成形中.并对汽车座椅数控渐进成形加工中,通常出现的破裂、回弹、起皱等严重影响成形质量的缺陷原因进行分析,采取不同的处理防范措施,取得满意的效果.为今后完善和发展金属板材数控渐进成形技术起到重要作用.     

商务策划学院专业导师制尝试--以2001级商务策划专业为例

本文阐述了重庆工商大学商务策划学院对大学本科学生实施专业导师制的尝试,包括对专业导师制的组织形式、任务、具体做法和实际效果,论述了专业导师制在大学本科教育中的地位和作用,提出了完善大学本科专业导师制的对策建议。     

线性规划模型在氧化铝生产配料工艺中的应用

配料工序是氧化铝生产中的重点和难点之一,其原矿浆和生料浆技术指标的好坏直接关系到拜耳法的溶出效果和烧结熟料的质量和产能,而其中生料浆合格率的控制又是最为复杂的。本文试图将运筹学的高级工具线性规划模型应用于生料浆的调配中,为提高生料浆合格率探索一条可行的途径。     

模具生产联合体加工作业统一调度问题的研究

模具生产联合体是由小规模企业组成的模具设计、制造联盟，由于设备、工装和人员分属于不同的加盟企业，其作业排序过程非常复杂。为此提出一种复合式模具生产联合体的生产排序方法：依据基本优先规则首先完成单一工序作业，然后对多工序作业用改进遗传算法进行工艺优化，求出最优解和次优解，再使用评价函数法选择最佳作业路线。该方法在生产试验中取得了良好的成效．能较好满足模具用户和加盟企业两方面的需要。     

中国大学校园研究现状述评

本文针对目前中国大学校园建设实践中存在的问题，分别考察了高等教育界和建筑与城市规划界对大掌校园的研究现状，提出应该打破高等教育和建筑城市规划之间的学科壁垒，站在跨学科的视角上研究大学校园。     

基于自我认知能力提升的大学生职业生涯规划探析

大学生健康积极的自我认知是职业生涯规划教育顺利开展的重要前提和基本保障,加强和完善大学生自我认知对大学生职业生涯规划教育具有重要意义。如何提升大学生在职业生涯规划中的自我认知能力成为摆在高校教育工作者面前的一个重要课题,对此从增强大学生自我认识、自我评价能力和水平、构建科学的自我认知模式等方面入手,促成大学生进行自我科学认知,积极寻找未来职业发展方向。     

Case‐based approach for supporting strategy decision making

The practice of strategy decision making proves that when the management board is strongly limited in its capacity to take rational actions, specifically in the context of great decision complexity and uncertainty, it is considered good practice to refer to experience through reasoning by analogy. In this paper, we would like to concentrate on supporting strategic decisions in small and medium enterprises (SMEs). The complexity of analogy‐based reasoning has its roots in an attempt to solve new problems based on past cases from a different domain, while we will focus on case‐based approach for a single domain. Additionally, we have chosen case‐based reasoning as a suitable decision‐making paradigm because it is corresponds to managers’ decision‐making behaviour. We present the STRATEGOS case‐based reasoning system for supporting strategic decision making by SMEs management boards and then the system evaluation by the dozens of chief executive officers (CEOs) from SMEs is presented. The results of the survey are promising and show the remarkable correspondence of the proposed solution with expectations and strategic behaviour of CEOs.     

Toward Self‐Motivated,Cognitive, Continually Planning Agents

We present a flexible initial framework for defining self‐motivated, self‐aware agents in simulated worlds, planning continuously so as to maximize long‐term rewards. While such agents employ reasoned exploration of feasible sequences of actions and corresponding states, they also behave opportunistically and recover from failure, thanks to their continual plan updates and quest for rewards. Our framework allows for both specific and general (quantified) knowledge and for epistemic predicates such as knowing‐that and knowing‐whether. Because realistic agents have only partial knowledge of their world, the reasoning of the proposed agents uses a weakened closed‐world assumption; this has consequences for epistemic reasoning, in particular introspection. The planning operators allow for quantitative, gradual change and side effects such as the passage of time, changes in distances and rewards, and language production, using a uniform procedural attachment method. Question answering (involving introspection) and experimental runs are shown for our particular agent ME in a simple world, demonstrating the value of continual deliberate, reward‐driven planning. Though the primary merit of agents definable in our framework is that they combine all of the aforementioned features, they can also be configured as single or multiple goal‐seeking agents and as such perform comparably with some recent experimental agents.     

基于速度修正项的机械臂避障路径规划

针对机械臂运行过程中存在的碰撞问题, 提出一种基于速度修正项的机械臂避障路径规划方法. 利用B 样条曲线进行机械臂关节空间规划, 使机械臂能够在特定时刻运行到指定构型. 在运行过程中, 利用碰撞检测算法实时计算机械臂与障碍物的最小距离, 在碰撞即将发生时引入积分为零的避障速度修正项改变机械臂运行轨迹, 使得机械臂能够在实现障碍回避的同时, 保证其在特定时刻通过指定构型的要求. 仿真实验表明了所提出方法的正确性和有效性.     

一种混合驱动柔索并联仿生眼的轨迹规划

在与眼球运动相关的解剖学和运动学的基础上,设计了一种符合Listing定理的基于混合驱动柔索并联机构的3自由度机器人仿生眼.通过矢量封闭方法建立了逆运动学模型,求解出柔索并联机器人的雅可比矩阵和结构矩阵.利用达朗贝尔定理建立柔索并联机器人的力矩平衡方程组,采用广义逆矩阵的相关理论,以柔索张力矢量的2范数最小为目标进行张力优化.用蒙特卡洛方法计算出仿生眼球可达工作空间.最后,在Simulink环境下进行仿真,规划运动轨迹并得到柔索并联机器人运动特性的仿真结果,证明了本文设计的机构符合Listing定理.结果表明:基于混合驱动柔索并联机构的机器人仿生眼结构合理,数学模型正确.