杭州压力表厂

杭州压力表厂是机械工业部所属生产压力仪表和流量仪表的专业厂家之一,创建于1965年,主要产品有压力仪表类:普通压力表、真空表、压力真空表、氨气压力表、氧气压力表、电接点压力表、船用压力表、轮胎压力表、压力表机芯;压力变送器类:YST-1差动微压压力变送器、YST-2差动压力变送器、YSW-10电涡流压力变送器;流量仪表类:节流装置、CEB差压变送器、CEB差压变送器、CEB-301差压流量变送器、CMBS-302流量计量器、XLY-01流量打印器和LHP-01流量计算器校验仪.     

压力表自动检定装置

利用PC机、PLC为主要硬件,组态王软件为开发平台,组成计算机控制系统,构建压力表自动检定装置。根据检定规程要求,由计算机控制造压系统,任意设置压力点,实现检定过程自动化。装置自动采集标准压力值,自动计算示值误差、回程变差、轻敲位移,与检定规程允许误差计算一览表比较,自动判定压力表的合格与否。实现可视的操作界面、保存检定数据、打印检定证书。     

压力仪表校验系统设计研究

首先介绍了当前行业内压力表校验系统的研究现状,并分析了当前压力仪表检定的发展方向,最后重点对压力仪表校验系统设计,从系统的需求分析出发进行了分析和研究.     

浅谈弹簧式压力表在校验过程中常见的故障及处理方法

在工业生产和日常生活中,压力是一个非常重要的参数.压力表也广泛地被应用于工业控制和测量过程当中.弹簧管式压力表具有结构简单、测量范围广、可靠性高、结果易读、价格便宜等特点,是目前被普遍使用的一种压力仪表.作为一名仪表检验人员能够将检定不合格的压力表重新调校合格,使资源得到有效地利用也是一件值得骄傲的事情.本文就是对弹簧式压力表在校验过程中的常见故障及处理方法进行一些探讨.     

指针式压力表自动检定系统的设计与实现

设计并开发了一种指针式压力表自动检定系统。该系统包括压力表检定／校准管理系统和仪表示值自动判读系统两部分。系统的可视化界面使得操作非常简单,操作人员只需输入量程、精度等必要参数,压力表的指针读数即可自动读出。给出的自动判读方法可用于各种指针式仪表精度的自动检测、判读,其精度取决于图像的分辨率和限定的处理时间。本系统可较大地改善压力表人工检定工作的落后状况,在一定程度上提高了检定工作的自动化水平和检定结果的稳定性。     

北京莱森泰克科技有限公司——系统解决方案专家

<正>解决方案:·变送器/传感器自动化标定系统·变送器/传感器自动化校验系统·通用型自动检定/校验系统(适用于活塞)·疲劳试验机系统·全自动流量计检定/校验系统·压力表检定/校验方案·激波管压力传感器测试系统(适用于动态压力)·正弦压力传感器测试系统代理产品:美国mensor公司压力产品日本横河公司压力产品定制传感器及工装德国伊尔姆真空泵、德国莱宝真空泵     

压力表测量不确定度评定及检定调压速率研究

指针压力表因具有稳定可靠的特点而被广泛应用于工业生产中，为确保其测量结果准确可靠需进行定期检定。该文针对手动检定指针压力表过程中示值误差的测量不确定度进行分析和评定，采用表示指南法，根据检表过程中可能的因素分析各不确定度的来源，计算各个不确定度分量，再得到合成不确定度评定结果；并进行手动操作检定装置检定压力表打压速率实验，探究检定过程中检定点之间的压力变化规律，得出适宜的升、降压速率。研究结果可以反映被测量值的误差波动范围，利于对检测结果的质量进行合理判断，为自动化的压力控制速率提供参考依据。     

基于《互感器校验仪通信协议》的全自动整检装置

按照JJG 169《互感器校验仪检定规程》的要求,一般采用互感器校验仪整体检定装置对互感器校验仪进行检定。目前各电科院、计量院使用的互感器校验仪整体检定装置都是采用电工式设计,采用手动方式对互感器校验仪进行检定。国家电网公司2013年颁布的企业标准Q/GDW 1897《互感器校验仪通信协议》明确了互感器校验仪的通信技术要求,也为对互感器校验仪的全自动检定提供了可能。本文介绍一种基于《互感器校验仪通信协议》的互感器校验仪整体检定装置,该装置采用电子式设计,完全满足《互感器校验仪检定规程》及《互感器校验仪通信协议》的技术要求,实现了对互感器校验仪的全自动检定。     

智能电能表离散型自动化检定的协同应用

为实现智能电能表离散型自动化检定系统的优化运行,提出了一种多系统协同运行方案。首先,在设备物理层面,基于智能电能表的离散型自动化检定特点,根据设备类别将离散型自动化检定系统划分为各子系统,构建离散型自动化检定的设备调度控制模式。其次,结合各子系统的特点以及在设备调度控制模式中的功能,基于优先级设计自动化检定调度系统的自动叫表流程,提出自动导引车(AGV)调度子系统搬运策略,建立机器人(RGV)控制子系统的挂卸表规则。接着采用前馈反馈验证机制,构建了封印贴标控制子系统的调度控制模式。然后,基于系统协同效应理论,采用帕累托多目标优化方法,建立离散型自动化检定系统协同优化调度的概念模型。最后,构建了智能电能表离散型自动化检定协同运行平台方案。实际工程应用验证了该方案的高效性和可行性。     

变电站内指针式仪表自动测试装置研究

目前变电站内包括SF6密度继电器、温控器等在内的指针式仪表仍然未能实现自动化数据读取.本文针对这类指针式仪表提出了一种数据自动监测方案.首先分析了指针式仪表的主要类别,分析了SF6密度继电器、主变温控器、压力表的功能特点、技术参数等.然后针对这类指针式仪表的主要技术参数,提出了数据自动检定装置的设计思路和原理,最后针对...     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。