摘要：Visually impaired people face difficulties in interacting and gaining full advantage of computers. Recently, and with the fast evolution in technology, researchers proposed to give the blinds the ability to take advantage of these advancements. Accordingly, designers and engineers started working on projects that relate input and output devices to the computers in order for the blind individual to have full control of the hi-tech machines. However, investments in these kinds of hardware presented complexity in the design, in addition to the high cost imposed by the devices used. The project’s objective is to design and develop a Multi-Lingual Braille System Output Device for the visually impaired individuals that enable them to access and read texts from a computer. The device acquires both English or Arabic texts and displays them using controlled piezoelectric Braille cells. It also has the ability to produce a sound that matches the displayed characters. The control of the cells is done via Programmable Interface Controller (PIC) microcontroller. The interaction between the device and the computer is done through the Universal Serial Bus (USB). C# is the language used to write the program responsible for controlling this interaction. The continuous development of such devices is essential for the visually impaired to keep up with the technological advancements. The main advantages of this system are its low cost, the added multi-lingual, and the audio features. In addition, many features can be added so as to satisfy the users’ needs, such as adding new languages and Grade 2 Braille System.

摘要：利用模流分析软件Moldflow对注塑制件葡萄筐盖进行翘曲变形分析,基于正交试验对模拟结果数据进行直观分析和方差分析,得出充填压力、保压时间、熔体温度、模具温度对翘曲变形的显著性,并获得试验水平基础上使制件翘曲量最小的最优参数组合以及最优参数组合下的制件翘曲值,并通过试验验证了结论的正确性。

摘要：在研究三维轴类零件与二维图形的关联关系基础上,提出一种基于二维图形信息的平面几何特征封闭结构的创建方法;并结合尺寸标注,提出一种轴类零件的三维结构特征的识别方法。实例与应用表明,所提方法可实现典型轴类零件三维特征的提取与识别,效率高,结果准确。

摘要：分析了五轴联动数控中心加工不锈钢叶轮的技术难点,并运用仿真技术加以解决。提出了仿真方法和仿真流程,并基于VERICUT仿真平台,以某型号叶轮的加工过程为例,实际进行了仿真。仿真结果显示加工刀具、加工参数对叶轮质量有重要影响。分析了仿真出现的问题,通过改变刀具、优化加工方案,最终完成了加工。实践证明,仿真技术有利于提高不锈钢叶轮的加工成功率,改进加工质量。

摘要：结合国内外标准中对于汽车电磁兼容标准的相关要求,对汽车零部件的传导、辐射骚扰的试验装置和试验方法进行了分析,并设计了相应的试验电路,得到了电源线传导骚扰试验和水平极化辐射骚扰试验的测量结果.对于射频场抗扰度的试验则采用电波暗室法、大电流注入法分别进行了测试,对比了两种方法各自的优劣.此外,对于零部件测试的一般原则进行了总结,分析了产生汽车电磁干扰的主要零部件,为汽车电磁兼容的设计提出参考.