项目管理在质量改进活动中的应用

该文介绍了如何将产品的质量改进活动项目化。应用项目管理的理论和方法,企业可以提高质量改进活动的效率。取得良好的改善效果。     

上海恒光塑料喷涂合作公司ODS清洗替代项目技术总结

文章总结了恒光塑料喷涂合作公司(原上海钟厂塑料件电镀加工车间)与瑞典合作淘汰ODS清洗剂的整个技术过程.通过中瑞双方专家的卓有成效的合作,在中方专家组和上海环境科学研究院消耗臭氧层物质替代技术研究推广中心研究人员的努力工作下,恒光公司找到了适合自己产品生产工艺的消除ODS物质的清洗工艺和相配套的清洗剂,闯出了一条适合塑料件电镀加工清洗的技术路线.在该行业中有一定的推广示范意义.     

Overlapping block transform: window design, fast algorithm, and animage coding experiment

A window design and fast algorithm for the overlapping block transform (OBT) of size N×L are presented. The presented algorithm for the OBT reduces the calculation complexity to an N×N transform with a fast algorithm and a simple preprocessing including windowing. A signal-independent window optimization strategy is introduced for image coding application. Results for a first-order Markov model and an image coding experiment show, that the coding gains of the optimized OBTs increase and blocking effects decrease with increasing window length L. A comparison with DCT-coding shows that the OBT, which has a slightly increased realization complexity, provides higher coding gain and a significant blocking effect reduction     

Acceleration of maximum likelihood reconstruction, using frequency amplification and attenuation compensation

Algorithms that calculate maximum likelihood (ML) and maximum a posteriori solutions using expectation-maximization have been successfully applied to SPECT and PET. These algorithms are appealing because of their solid theoretical basis and their guaranteed convergence. A major drawback is the slow convergence, which results in-long processing times. The authors present 2 new heuristic acceleration methods for maximum likelihood reconstruction of ECT images. The first method incorporates a frequency-dependent amplification in the calculations, to compensate for the low pass filtering of the backprojection operation. In the second method, an amplification factor is incorporated that suppresses the effect of attenuation on the updating factors. Both methods are compared to the 1-dimensional line search method proposed by Lewitt. All 3 methods accelerate the ML algorithm. On the authors' test images, Lewitt's method produced the strongest acceleration of the three individual methods. However, the combination of the frequency amplification with the line search method results in a new algorithm with still better performance. Under certain conditions, an effective frequency amplification can be already achieved by skipping some of the calculations required for ML.     

Internet Security and Acceleration Server 2000

防火墙的设计是互联网安全性考虑的第一层关卡,有人说连上防火墙也不见得就安全。原因是很多人以为装上防火墙就达到了安全的标准,其实防火墙只是一个网络安全的管理系统,重要的是企业有无一套安全性高的网络结构规     

清洗淘汰项目获联合国专家好评

2003年2月下旬,UNDP(联合国开发计划署)有关项目专家Clinton Norris先生、Ling-yee Ginbey女士和国家环保总局外经办清洗工作组共同考察和评审了清洗行业整体淘汰ODS的第一批淘汰项目。考察人员对淘汰项目运行的结果表示满意,特别是UNDP的专家对参与我国清洗行业第一年度ODS淘汰活动,即2000年度中标项目的现状给予了较高的评价。     

人工蜂群算法求解任务可拆分项目调度问题

针对任务可拆分的资源受限的项目调度问题,提出了一种人工蜂群算法与任务可拆分的串行调度机制相结合的优化方法．人工蜂群算法中每个食物源的位置代表一组项目任务的优先权序列,优先权序列通过调度生成机制转换为可行调度方案,迭代中由三种人工蜂执行不同的操作来实现全局最优解的更新．实算表明,基于优先权的人工蜂群算法可以有效求解任务可拆分项目调度问题,收敛速度较快且精度较高．     

Party Lines, Wikis, and Project Management

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/     

计算与通信重叠的V-Parcel Splitting机制

通信效率的高低直接影响并行系统的性能，计算与通信重叠则可显著降低通信开销，提高系统性能。由内嵌向量处理器的V—PIM构成的并行系统结合了向量和PIM的结构优势．简化了PIM处理器的设计并可较好地解决“存储墙”问题。为了支持在执行向量指令时使计算与通信重叠，提出了基于V—Parcel Splitting的通信机制，可根据向量元素在V-PIM并行系统中的分布情况自动选择降低通信量的通信方式。文章描述了V-Parcel Splitting的处理流程并给出简单的评测结果。     

重叠社区检测及其果蝇视觉进化神经网络

针对社区发现中,部分节点划分难的问题,探讨重叠社区检测的优化模型和求解的视觉进化神经网络.模型通过设计节点隶属度矩阵和节点分割规则,建立以模糊分割阈值为变量,且能评估社区划分效果的改进型模块度函数;算法设计中,以候选解构成的状态矩阵对应函数值矩阵作为输入,依据果蝇视觉系统的信息处理机制,建立以输出作为状态学习率的果蝇视...     

MEMS加速度传感器的原理及分析

主要介绍了五种目前常见的基于MEMS技术的加速度传感器,从物理结构的角度对这几种传感器的测量原理进行了分析,不但着重介绍了已经较为成熟且形成产业化的硅微电容式、压阻式、热电耦式加速度传感器,而且对目前较为前沿的光波导式加速度传感器也进行了一些分析和介绍。     

Reducing Switching Activity of Subtraction via Variable Truncation of the Most-Significant Bits

Reducing switching activity of Arithmetic and Logic Unit (ALU) is important for design of low-power processors. Due to two's complement data notation and fixed bit-width, existing ALUs perform many redundant signal transitions during subtraction, dissipating power. This paper proposes a new scheme that adaptively adjusts the ALU bit-width to input data variation. Unlike related techniques, the scheme masks the number of the Most Significant Bits whose values remain unchanged, thus preserving unnecessary signal variations in corresponding hardware. The scheme is simple in implementation yet efficient in performance. According to simulations, it can reduce the total number of signal transitions per subtraction as much as half and save up to 30% of energy/operation without sacrificing the quality of results.     

Overlapping modal and geometric symmetries for computing jet-engineinlet scattering

By examining the scattering from a cylindrical inlet terminated by a fan-like structure possessing discrete angular symmetry, it is found that only very limited intermodal coupling is possible. This fact is exploited in a hybrid finite element/modal scheme to develop a very efficient solution where only one slice of the geometry need be modeled. It is shown that a phase boundary condition at the interior walls of the mesh is sufficient for the complete solution of the problem. The implementation of the phase boundary condition is detailed for the full three-dimensional case, including special considerations for enforcing the boundary conditions along the axis. A simple example is shown for the sliced, hybrid finite element/modal scheme to validate the method     

基于FPGA的视频字符叠加的设计与实现

设计了一种基于FPGA的视频字符叠加系统,利用视频解编码芯片和FPGA对视频数据进行采集和处理,生成所需的带字符的视频.介绍了系统的硬件构成、YUV数字视频信号、PC控制、视频字符叠加的原理和具体的程序设计思想,并对其中的难点进行了详细分析.本设计可以在视频的任意位置叠加字符和图像,内容变动时容易修改.     

MEMS技术应用于加速度传感器高频继电器

松下电工控制机器事业本部推出了采用MEMS技术的三款产品,分别是超小型MEMS高频继电器、面向车载用途的单轴加速度传感器、适用于小型数字设备的三轴加速度传感器。     

并行加速机的研究与实现

本文介绍了一种并行加速计算机的新概念、结构及应用。使用并行加速机可使现有的计算机系统在性能上更新换代，且方法简单，经济有效。     

电迁移加速测试模型参数分析及其趋势研究

对电迁移加速测试模型Black方程中参数的内在物理含义进行了研究,指出参数数值本身代表着电迁移的不同失效机理;对其在不同技术节点的数据进行了系统总结,给出了加速参数随着技术发展的变化趋势与合理范围,可以利用加速参数对工艺中的问题提供改进方向,为判断测试结果,测试条件和测试结构是否合理提供了参考基准;讨论了威布尔分布在电迁移测试中应用的可行性与优点,威布尔分布的形状参数为判断测试结果是否合理提供了更直接、有用的参考信息.     

大容量关口局替换的工程割接与实现

以关口局割接中遇到的问题为线索,说明了割接方案,提出了割接话务流量模型,并以此为依据给出了过桥中继负荷的计算方法,较好地解决了实际中遇到的问题。     

Activity,regulation, and intracellular localization of RGS proteins

RGS proteins attenuate the activities of heterotrimeric G proteins largely by promoting the hydrolysis of the activating nucleotide GTP. This review discusses the interactions of RGS proteins and G proteins and how those interactions are regulated by a variety of factors including auxiliary proteins and other cellular constituents, posttranslational modifications, and intracellular localization patterns. In addition, we discuss progress that has been made toward understanding the roles that RGS proteins play in vivo, and how they may serve to govern responses to G protein-coupled receptors upon acute and prolonged activation by agonists.     

用于光谱重叠峰和太赫兹波时域曲线的高斯拟合算法

为了拟合光谱重叠峰及太赫兹时域曲线,设计了一种动态增加高斯函数的高斯拟合算法.首先,利用去噪光谱数据的一阶导数粗略搜寻各高斯峰的位置,再根据高斯峰位置初始化多高斯函数.然后,将光谱数据与多高斯函数的均方差作为损失函数,用梯度下降法找到损失函数最小时的多高斯函数.最后,针对没有明显峰尖的光 谱重叠峰和存在负值的太赫兹时域...