激光扫描共焦荧光显微镜的电子控制系统研究

介绍了激光扫描共焦荧光显微镜的电子控制系统，为了提高激光扫描器的定位精度，在系统中提出采用基于闭环象素时钟发生器的检流计振镜所固有的扫描非线性失真补偿方案，减少输出图象的枕形畸变，实现行扫描空间位置的均匀性。在以细分梯形波电流驱动反应式步进电机情况下，根据实测θｉ曲线，用反插法求得与步进电机运行非均匀性相补偿的相电流波，从而获得在小电流情况下高角度均匀的步进电机细分运行特性。     

变结构变参数设计方法及其在机械CAD中的应用

提出了一种新颖的机械结构设计思想－变结构变参数设计方法，并结合实例，阐述了变结构变参数设计的概念、原则、实施措施和意义。由此对Ｉ－ｄｅａｓ软件包进行了二次开发，编制了发动机曲轴专用ＣＡＤ软件程序，并用某型号发动机曲轴进行了验证。     

一种非调制式热释电红外传感器

基于红外技术理论提出了利用热释电红外传感器(PIS)对目标扫描过程中产生双向热电电流构成非调制式热释电红外传感器的方法,并讨论了利用双并联技术的非调制式热释电传感器。     

大截面金属镍棒的焊接工艺与实践

金属镍在电渣精炼前需用氩弧焊焊接接长,为保证焊接接头具有足够熔深,需要大参数进行焊接.采用直流焊机并联使用解决了焊机电流不足的情况,通过采取垫高镍棒端头,使接缝处于受压状态,以防止裂纹的产生.     

The feature-based posterior crown design in a dental CAD/CAM system

This paper presents a newly developed CAD approach for a quick and accurate design of a dental posterior prosthesis. The approach arises from the basic idea that every human tooth has its own specific features. Based upon the features of the standard posterior tooth, the initial data containing the defined feature points are firstly acquired from the scanned points of the standard tooth. The standard prosthetic profile is thereby formulated using the bicubic Nurbs surface fitting technique. This profile has the two functions of possessing the same features with the patient’s missing posterior tooth, and the adjustability with the feature points and the defined B-spline profile feature curves. For the purpose of the adjustment of the established model, the global and occlusal feature curves are proposed considering the individual patient’s original information. According to these curves, the corresponding standard prosthetic profile is locally adjusted to meet the fit of the global size and occlusal surface. Finally, a close and continuous profile of a posterior crown is generated. Using this design, a posterior prosthesis is successfully manufactured in the computer-aided machining process.     

A 4-MB on-chip L2 cache for a 90-nm 1.6-GHz 64-bit microprocessor

A 4-MB L2 data cache was implemented for a 64-bit 1.6-GHz SPARC(r) RISC microprocessor. Static sense amplifiers were used in the SRAM arrays and for global data repeaters, resulting in robust and flexible timing operation. Elimination of the global clock grid over the SRAM array saves power, enabled by combining the clock information with array select signals. Redundancy was implemented flexibly, with shift circuits outside the main data array for area efficiency. The chip integrates 315 million transistors and uses an 8-metal-layer 90-nm CMOS process.     

一种基于数字电视系统的数据传输技术研究

数字电视是较为成熟和先进的信息传输技术，详细介绍一种通过数字电视系统传输数据的方法。     

Coordinating Agents in Shop Floor Environments From a Dynamic Systems Perspective

In this paper, we address agent coordination from a dynamic systems perspective and propose a dynamic coordination model, which is inspired by biological metabolic systems. A new coordination mechanism through dynamic local adjustment (CDLA) is presented, and coordination is achieved when every agent utilizes explicitly the global system dynamics and performs iteratively a dynamic local adjustment procedure. The CDLA mechanism is investigated in an example multiagent shop floor system. The results show that the example manufacturing process is well-coordinated and the coordination approach is practically applicable and effective     

堆载预压法加固软基土体稳定性的有限元分析

堆载预压过程中,进行相应的稳定分析对于控制加载速率、确定加载高度是必须进行的一项工作,采用有限单元法对此进行了探讨,详细阐述了有限元理论分析边坡稳定的几种重要因素,并考虑分步堆载的特点,模拟堆载过程,具有一定的工程实际意义。     

常减压蒸馏装置阻垢剂进料管腐蚀与防护

通过对常减压蒸馏装置阻垢剂进料管的材质、性能、工作条件及腐蚀形貌、腐蚀产物的全面分析,找出了使进料管发生大面积腐蚀的腐蚀介质为环烷酸.并提出了减缓阻垢剂进料管环烷酸腐蚀的措施,主要包括选用更耐蚀的316或316 L材质以及改进三通结构等.