基于开发流程的测试流程管理

通过分析传统测试流程的缺点,根据软件开发流程各个阶段的特点,提出了建立基于开发流程的测试流程,通过对开发流程中各阶段文档和产品的评审和测试,形成详尽的测试文档,为提高软件开发效率和保障软件质量,提供了一套行之有效的管理方案。     

浅谈电子产品装配工艺与工艺控制

电子产品的装配工艺的好坏对于电子产品的质量有着很大的影响,在对电子产品进行装配的时候要对电子产品的工艺流程进行严格的控制和管理,保证电子产品的质量,这样能够使得电子产品的质量以及安全性能得到提升.下面和篇文章主要就是对电子产品的装配工艺进行详细的研究和分析,并且对工艺控制过程进行阐述,从而帮助企业生产出更多质量优异的电子产品.     

探究电子产品生产工艺及过程

新时期,在工业的推动下,电子产品在人们生活中占有较高的比重,已逐渐成为人们生活中不可或缺的用品。电子产品的需求量增加,生产规模也逐步扩大,销售渠道做到了线上线下结合,但是伴随着产品安全性能问题的出现,需要对生产过程高度重视,对于每个生产环节都要强化管理,加快生产进度,提高产品质量。文章着重于研究电子产品生产工艺及过程。     

The impact of process noise on VLSI process improvement

Process improvement is critical to commercial success in VLSI fabrication, especially during ramp-up. This paper investigates one of the factors-process noise-that drives the success of process improvement. Split-lot controlled experiments are vulnerable to confounding by experimental noise, caused by process variability. Fabs with low noise levels have a higher potential for learning (and hence improving their production processes) than high noise fabs. Detailed probe yield data from five semiconductor fabs were examined to estimate process noise levels. A bootstrap simulation was used to estimate the error rates of identical controlled experiments conducted in each fab. Absolute noise levels were high for all but the best fabs, leading to lost learning. The magnitude of lost learning is estimated numerically; it ranges from ten percent to above one hundred percent of the theoretically possible learning in an experiment. In some cases, experiments are little better than coin flipping. Standard statistical methods are either expensive or ineffective for dealing with these high noise levels. Some alternative nonstatistical countermeasures are recommended     

Dataflow process networks

We review a model of computation used in industrial practice in signal processing software environments and experimentally and other contexts. We give this model the name “dataflow process networks,” and study its formal properties as well as its utility as a basis for programming language design. Variants of this model are used in commercial visual programming systems such as SPW from the Alta Group of Cadence (formerly Comdisco Systems), COSSAP from Synopsys (formerly Cadis), the DSP Station from Mentor Graphics, and Hypersignal from Hyperception. They are also used in research software such as Khoros from the University of New Mexico and Ptolemy from the University of California at Berkeley, among many others. Dataflow process networks are shown to be a special case of Kahn process networks, a model of computation where a number of concurrent processes communicate through unidirectional FIFO channels, where writes to the channel are nonblocking, and reads are blocking. In dataflow process networks, each process consists of repeated “firings” of a dataflow “actor.” An actor defines a (often functional) quantum of computation. By dividing processes into actor firings, the considerable overhead of context switching incurred in most implementations of Kahn process networks is avoided. We relate dataflow process networks to other dataflow models, including those used in dataflow machines, such as static dataflow and the tagged-token model. We also relate dataflow process networks to functional languages such as Haskell, and show that modern language concepts such as higher-order functions and polymorphism can be used effectively in dataflow process networks. A number of programming examples using a visual syntax are given     

Sputter-delineated MOST process

A process, based on pyrolytically deposited doped oxide diffusion technology and sputter (Spu)-delineated (del) source and drain windows to obtain short molybdenum gate lengths, for the fabrication of MOSFET is described. Various advantages are also pointed out.     

喷流方式对电镀填孔影响分析

电子产品更轻、更薄的发展趋势,使印制电路板在高密度互连技术上面临挑战。微孔堆叠技术是一种用来实现高密度互连的方法。如今,电镀填孔工艺已得到广泛的应用,主要是通过对流使填孔光剂产生吸附、消耗和扩散,从而填充盲孔。本文着重从底喷的对流的方式来介绍其对盲孔填孔的影响。     

基于改进GPR模型的发酵过程软测量建模

针对生物反应过程中许多关键参量难以在线检测的难题,提出了一种改进的高斯过程回归建模方法。由于传统高斯过程的均值函数不易确定,从而简单预置为零,导致模型对数据的解释性不够完全的缺点。改进的方法是利用一种组合基函数来确定高斯过程回归模型的一个非零均值函数,基函数的选取是通过高斯过程建立多项式回归噪声模型的方式推导而出,最后进行软测量模型的预测输出。基于氨基酸类典型菌种L-赖氨酸反应过程关键生物量参数预测的试验研究表明：与传统的高斯过程回归模型和支持向量机相比,改进的高斯过程回归模型具有更好的预测精度和泛化能力,能很好的跟踪预测值的变化趋势。     

Of time and process

an ordinal view T om B runeau University of Guam
U prugtnutic: view P eter R. M onge E ric M. E isenberg K atherine I. M iller University of Southern California R ichard V. F arace Michigan State University
more than content analysis D avid H. W eaver Indiana University
myopic empirical research J erry L. S alvaggio University of Houston     

底部填充工艺探讨

底部填充工艺是倒装芯片封装过程中的一个必不可少而且很关键的组成部分,底部填充工艺的成败将直接影响到封装的可靠性。本文针对底部填充工艺中需考虑的多个方面,如分配模式、胶水体积计算、硬件选择等,阐述如何改进工艺,增强底部填充的自动生产的能力。     

守护进程浅析

守护进程独立于控制终端并且周期性的执行某种任务或等待处理某些发生的事件.在Linux系统中,大多数服务器都是用守护进程实现的.现介绍了守护进程的编写步骤,并给出了避免守护进程本身的多个副本相互干扰的加锁方法.     

The process engineer's workbench

A workstation-based implementation of a software system aimed at VLSI fabrication process synthesis is described. The system provides a versatile user interface to a number of process design aids, and incremental simulation capability, and an attractive graphical display of simulation results     

The disaster survival process

This publication contains reprint articles for which IEEE does not hold copyright. You may purchase this article from the Ask*IEEE Document Delivery Service at http://www.ieee.org/services/askieee/.     

Analysis of process models

Process modeling tools, such as the integrated definition (IDEF) methodology, allow for a systematic representation of processes in manufacturing, product development, and service applications. Most of the process modeling methodologies are based on informal notation, lack mathematical rigor, and are static and qualitative, and thus can be difficult to use for analysis. In this paper, a new analysis approach for process models based on signed directed graphs (SDGs) and fuzzy sets is presented. A membership function of fuzzy sets quantifies and transforms incomplete and ambiguous information of process variables into an SDG qualitative model. The effectiveness of the approach is illustrated with an industrial example. The architecture of an intelligent system for qualitative/quantitative analysis of process models is presented