物料搬运机械手研制探讨

随着近年来我国经济的快速发展,全球化的趋势越来越高。对企业的生产效率要求越来越高。而在制造加工企业中,物料的搬运与管理是企业生产中的关键一环。采用机械手进行物料搬运可以大大提高企业的搬运效率,帮助相关企业在日常的生产管理中提高自动化程度。机械手一般由三个部分组成,分别是执行机构、驱动机构、控制系统。文章试分析机械手在物料搬运中发挥的作用,探讨物料搬运机械手的研制。     

基于ATmega168的六自由度机械手控制系统的设计

本文介绍了基于AVR系列单片机-ATmega168的控制器的设计，以及机械手整体结构的组成设计。机械系统的设计采用模块化的设计方案，即将功能分解，降低模块之间的耦合性,控制系统分为硬件控制系统和软件控制系统。硬件控制系统主要是由6路伺服电机、金属支架组件以及控制器构成。软件控制系统采用VB编写的上住机软件进行实时控制。     

一种智能可控车载机械手的设计

文章首先对智能可控车载机械手进行了总体方案设计,确定其组成部分。然后设计机械手的机械结构并利用三维软件进行模型绘制,设计控制系统,并编写控制系统软件。经过装配、调试等环节,最终得到一种可以实现上位机无线控制的车载机械手。     

一种图书搬运机器人的设计

图书搬运机器人是实现图书馆信息化与自动化的重要设备.其关键技术是机器人自动识别技术、自动导航技术、机器人移动装置设计及图书存取机械手设计.本文设计的图书搬运机器人可以在无人干预的情况下对图书进行识别、搬运和上下架,这不仅降低了图书馆员的劳动强度,还提高了图书上下架的工作效率.     

基于组态软件机械手监控系统的研究

研究了组态软件在机械手图形监控系统中的应用,通过PLC实现机械手的自动控制系统。基于组态软件设计出图形监控人机界面,实现图形动画连接,机械手的监控。通过组态软件实现机械手的动作过程图形动画演示,使机械手的动作形象化。提供较为直观、清晰、准确的机械手运行状态,充分提高系统的工作效率。     

基于单片机的搬运机器人设计

本设计使用单片机对搬运机器人系统进行控制。通过单片机输出稳定的脉冲信号控制舵机的运动,实现三自由度运动以达到灵活抓取、转移、放松物体的目的。经过实验和调试,信号输出稳定,实现了机器人自行搬运物体的动作。     

上下料机械手的PLC控制系统设计

文章介绍了某小型数控车床的自动上下料机械手的结构、工作原理、气压传动系统、驱动装置和控制系统,根据数控车床和机械手的工作流程,采用S7-226 PLC为控制系统,编制了相应的程序,取得了较好的效果。     

上海CeMAT ASIA 2008德国Messe司与汉诺威大学的自动导引车展厅

自动导引车系统,简称AGV-System,是一种控制系统和由遵循一定轨道运行的无人驾驶电动车组成的搬运系统。其中的控制系统主要是用来控制和协调各个搬运车,使它们可以在需要的时候互不干扰地移动到需要的地点,从而实现高效率搬运作业。控制系统的任务主要是管理各种搬运指令、进行调度优     

基于PLC与步进电机的气动手搬运机械手控制

本文针对气动机械手的结构以及工作原理的介绍，重点分析了气动机械手的控制要求，并在此基础上进行气动机械手控制系统的设计，而且通过相关实验，证明该机械手控制方便、定位精确，可以长期稳定的运行。     

气动在机械手中的应用

文章中所介绍的气动机械手采用三菱FX1S-30MRPLC控制,利用气缸与电磁换向阀模拟了实际生产中的物料转运系统,在分析控制要求的基础上,设计了气动控制系统及PLC控制系统。该机械手的气动回路简单,再加上用PLC控制,结构体积小,成本相对较低,经济适用,操作简单,易学易用。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.     

Introduction of New Technology with a Sound Transition of the Input-Output Structure

We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。