A Methodology for Determining Engineering Curriculum Contents

As the life span of engineering subjects decreases the importance of valid determination of engineering curriculum contents increases. A methodology for determining and updating contents of an engineering curriculum has been developed and implemented by a curriculum design research team from the Technion—Israel Institute of Technology. According to this methodology, the decision-making process of the Curriculum Committee members is based on data collected systematically from relevant work sites, relating to cognitive, affective and instrumental skills and knowledge items, required at present and for the foreseen future, from graduates of the educational program. The theoretical foundations of the approach are rooted in the Facet Theory which provides a framework for defining a universe of observations and arrive at an empirical structure for reality based decision making processes. The establishment of a definitional system, by means of a mapping sentence, is devised and a corresponding questionnaire for systematic determination of occupational field demands required from engineering graduates, is designed. The sampling issue of the questionnaire-run is discussed and illustrated through experimental data, representing reality-based situations. The purpose is to arrive eventually, through verified data analysis methods, at a hierarchy of skills and knowledge items, to distinctive occupational field demands, to a professional content portrayal and to a structure of professional field requirements.     

Process Capability Improvement for Multistage Processes

While the quality control procedures for multistage has been considerably studied, multistage process capability analysis has not been explored much at all. Fostering on the recent development of the multistage process variation transmission model, a multistage process capability analysis algorithm is developed to prioritize process improvement efforts. The application of algorithm is demonstrated with two 2-stage industrial process examples and a 4-stage process example for its expandability.     

Process Capability Optimization

This paper presents a multiple objective approach to process capability optimization. It identifies the key input and output variables, provides examples and analysis. The techniques explored are:

1. Finding the mean shift that optimizes various output performance objectives, such as minimizing the fraction nonconforming or maximizing Cpk, and
2. Finding a mean shift and variation change that optimizes profitability.

     

多元质量特性的过程能力指数

多元质量特性过程能力指数是一个尚未得到很好解决的问题。本文利用主成分分析,给出了计算多元质量特性过程能力指数的一种新方法,实证分析表明这种方法是可行的。     

优化Flame工作流程

优化工作流程是指在图像数据处理工作中，通过一定的方式，在一个项目或日常的编剪、合成工作中，采用一定的管理方法和技术手段使各个厂家的工具软件能够相互配合，减少不必要的数据流量，增强对版本的控制，缩短项目的制作周期。     

非量测数码相机成像性能测定方法研究

非量测相机广泛应用于摄影测量领域,因此必须对其成像性能进行测定。本文分析了影响调制传递函数的因素,设计了利用影像的灰度曲线测定非量测相机成像性能的方法,经过与调制传递函数曲线的对比实验,表明了该方法具有简单、便于操作、稳定可靠的特点。     

脱硫除雾器冲洗喷嘴性能优化试验研究

冲洗喷嘴是除雾器冲洗系统中最重要的执行部件,随着脱硫工艺的发展,工程实践对冲洗喷嘴的冲洗性能提出了更高的要求。经过大量试验,系统地研究了冲洗喷嘴的冲洗流量、扩散角、冲洗水量和均匀度的变化规律,为冲洗喷嘴的设计和改进提供了参考依据。     

基于工序成本的多元过程能力指数分析

单一的多元过程能力指数在反映企业制造多元质量特性产品能力时存在缺陷,无法反映由于各工序成本的差异而造成的工序能力重要性的差别.基于此,从企业工序质量控制和工序成本关系的角度来分析,构建了基于工序成本修正的多元过程能力指数,反映企业的成本控制能力和产品竞争能力.最后,通过修正得到的多元过程能力指数,一方面优选企业的质量改进或控制方案,另一方面判定企业在同类产品制造中的实际质量控制能力和过程成本损失差异.     

响应面法优化CoFe2O4高温改性海泡石制备条件研究

采用高温对天然海泡石原矿进行改性,制备具有可高温催化氧化再生CoFe2O4/高温改性海泡石吸附剂.利用SAS软件中的二水平设计和响应面分析法对制备CoFe2O4/高温改性海泡石的影响因素进行了优化.采用PIackett-Burman(PB)设计对影响CoFe2O4/高温改性海泡石再生率相关因素的效应进行了评价并筛选出显著因素:n(Co(NO3)3):n(Fe(NO3)3)、m(金属氧化物):m(海泡石)及煅烧温度,其它因素对CoFe2O4/高温改性海泡石再生率的影响不显著.根据Box-Behnken设计及响应面分析确定了重要影响因素的最佳条件.结果表明,CoFe2O4/高温改性海泡石的最适制备工艺为:n(Co(NO3)3):n(Fe(NO3)3)=1:2.0,m(金属氧化物):m(海泡石)=0.50:10,煅烧温度610℃.在该条件下CoFe2O4/高温改性海泡石的再生率达79.93%.与模型预测值十分吻合.     

串联工业机器人系统可靠度的一种两级优化分配及其算法

提出一种两优化原则,整体可靠度分配给子系统采用“花费”最小原则,子系统可靠度分配给单元采用考虑“权重”的优化原则,并且采用两种优化算法,即用能简化求解过程的目标协调法,二维混合协调法和ＡＧＲＥＥ法对可靠度优化分配进行求解,从而使系统全局可靠度优化分配的效果更好。     

基于精锻件的机器人控制系统研究

开发了具有开放式结构的用于精锻工艺的机器人控制系统．系统采用DSP为核心,位置伺服控制方式,PC＋DSP模式构建硬件平台,采用模块化和多线程技术设计软件程序,具有良好的实时性,满足运行速度要求,调试结果表明,此系统重复定位精度达到2mm,满足设计要求．     

多肢体自位移动机器人研究进展

阐述了自位机构原理、多肢体机器人运动动力性能和自位机器人系统样机研究过程中取得的主要进展,研制成的机器人自位机构可望应用于在易倾覆的复杂地形上行走的自主移动机器人中,以完成诸如外星考察、地震救灾等作业任务。     

包装印刷中印刷机的适性分析

在分析了高质量彩色包装印刷及其色彩管理过程中印刷机的稳定性和可靠性之重要的基础上,介绍如何通过数学的定量计算及控制图表方法来分析和了解印刷机在校准阶段和实际生产中的适性.     

面向多品种小批量生产的工序能力指数计算

在概述一般的工序能力指数计算方法的基础上，提出应用成组技术把工艺过程相似、结构相同而公差要求不同的零件归类，通过数据变换转化为服从同一分布的数据，由此计算工序能力指数，旨在解决多品种小批量生产方式下计算工序能力指数中数据不足和工序能力指数繁杂的问题。     

Optimizing the Hot Isostatic Pressing Process

A genetic algorithm (GA) is used to optimize the hot isostatic pressing (HIPing) process for beryllium powder. The GA evaluates a HIPing model with different processing schedules in an effort to minimize temperature, pressure, processing time, ramp rates, grain growth, and distance to target relative density. It is shown that this is a constrained, multiobjective, noisy, optimization problem to which the GA is able to evolve a large number of viable solutions. However, for the GA to work in such a large multidimensional search space, it is suggested that the constraints be treated as objectives and then penalize the Pareto ranking for each constraint violated. This approach is necessary because a large-dimensional objective space naturally results in most members being Pareto rank 1.     

A Test Methodology for Determining Space Readiness of Xilinx SRAM-Based FPGA Devices and Designs

Using reconfigurable static random access memory (SRAM)-based field-programmable gate arrays (FPGAs) for space-based computation has been a very active area of research for the past decade. Because these commercially available devices are only radiation tolerant in terms of total ionizing dose and single-event latchup, these devices must be qualified for other types of single-event effects to be used in spacecraft. Furthermore, mission requirements often dictate the need to do radiation experiments on the FPGA user circuit. Because both the circuit and the circuit's state are stored in memory that is susceptible to single-event upsets, both could be altered by the harsh space radiation environment. Both the circuit and the circuit's state can be protected by triple-modular redundancy (TMR), but applying TMR to FPGA user designs is often an error-prone process. Faulty application of TMR could cause the FPGA user circuit to output incorrect data. This paper will describe both device-level static testing and user circuit dynamic testing, including a three-tiered methodology for testing FPGA user designs for space readiness.