基于51型单片机汽车信号灯控制系统的设计

文章论述了基于51型单片机汽车信号灯控制系统的一种设计思路。系统利用AT89C51单片机来实现的汽车信号灯控制,具有手动和自动两种模式,该系统具有通用性好,可靠性高,线路简单,成本低廉,使用方便的优点,通过软件升级很容易实现功能扩展。     

基于单片机的智能防雨帘控制系统

介绍了一种具备湿度感应自动升降功能的智能防雨帘控制系统,主要由数据采集模块、红外遥控模块、控制器和电机驱动器等组成,实现了通过采集下雨天湿度信号控制窗帘自动升降的目的。文章主要介绍了这种控制系统的总体设计,特别是手动、遥控以及自动控制系统的工作原理以及设计方法。     

智能LED照明控制系统设计与分析

该系统以16位高速MSP430F169单片机作为控制核心,可以选择以键盘手动控制和根据外界光照强度自动控制两种方式调节流经LED的电流,即可改变其亮度。键盘手动控制方式步进为1mA,可以实现电流增减;自动控制方式以光敏电阻作为光传感器,将外界光强度变化转化为阻值变化,进而实现智能调节LED亮度的功能。     

专利技术开发

<正> 1 用途 安装在阳台栏杆或窗台上自动收晒衣物,对无人看管的家庭提供收晒衣物的方便。2 功能 (1)遇天气不好可将要晒的衣物晾在衣杆上,待天气好转,可自动由阳台转向阳台外进行晾晒;晒出的衣物突然遇到雨、雪、雾、露,可自动由阳台外转向阳台内。 (2)架可多用,不晾衣时,可将衣架转向屋内,挂干衣,不用时可收拢,不占空间。     

智能温控电风扇电路设计

本文介绍了以STC12C5410AD单片机为核心控制器件,采用DS18B20温度传感器、LCD1602等主要元件设计的智能温控电风扇系统,实现当前温度和风速的显示及风速的控制等功能,并具有自动调速和手动调速两种模式,且在不改变硬件电路前提下,仅增加一个蓝牙接受模块,通过软件编程就可以实现手机遥控等功能.     

智能电风扇设计

电风扇在夏季是一种重要的降温工具。传统的风扇只能通过人为控制挡位来调节风速。基于此，本文设计了一款智能电风扇。该风扇除了能够手动调速，还具有自动模式和蓝牙模式。在自动模式下能判断风扇周围是否有人，从而自动控制风扇的启停，能根据环境温度的高低，自动调整风速。在蓝牙模式下，能用手机APP遥控风扇相关功能。     

多功能机械手控制系统设计

本文设计了基于PLC的多功能机械手控制系统，该系统可实现手动/自动工作方式，其中自动工作方式时还可实现回原点、单周期和连续3种工作模式控制。     

基于单片机的智能窗户控制系统的设计

本文介绍了一种单片机智能窗户控制系统。该系统采用Freescale AW60单片机,通过检测雨水和温度等外界环境,实现窗户自动开启和关闭,也可以通过手机进行远程控制。     

海上油气生产平台手动报警站回路实时监控系统

海上油气平台火气监测报警及控制系统目前多采用模块化设计理念;为提高产能,保障人员、设备和生产装置的安全,目前海上油气田勘探工程应用的手动报警站多采用模拟量电流信号输入,达到电流设定值后触发生产关停和火灾报警.本文介绍了海上油气勘探平台火气监测报警及控制系统功能、火灾报警器分类及主要工作原理;中控人员可以实时对手动报警站进行监控,并通过技术手段对回路进行故障预判,及时发现问题,避免发生生产关停事件.     

家用摄像机的使用与保养

1 正确使用调焦功能 与照相机一样,要保证拍摄物体的清晰度就必须有调焦机构,摄像机上调焦机构有自动和手动两种。将自动/手动调焦钮置于自动(Auto)位置时,摄像机上寻像器中心位置的物体总是自动达到最佳拍摄距离。有时为了对寻像器中心位置以外物体进行调焦,就应将自动/手动调焦钮置于手动(Manual)位置,否则就不能达到拍摄要求。在摄像时,应随时根据摄像需要来掌握和使用调焦功能,如拍摄的对象移动性大,就应运用手动调焦,或有时所摄录的物体反光太强烈,自动对焦功能可能全失常,也应使用手动调焦功能。     

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.     

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。     

浅谈大体积混凝土裂缝的控制

大体积混凝土的裂缝问题是实际工程中长期困扰工程技术人员的问题,其控制技术的研究是混凝土结构研究的热点问题,具有重大的学术价值和潜伏的工程背景。     

Supply Chain Strategies in the UK Fashion Industry—The Rhetoric of Partnership and Realities of Power

This paper focuses on the fashion industry, one characterised by issues such as dramatic shifts in the scale and power of major retail buyers in the market, the advent of retailer own brands, and the nature of sourcing and supply chain decisions, issues that are increasingly global in nature. The aim of this research is to explore the nature of relationships between UK high street multiple fashion retailers and their contracted suppliers, many of whom are entrepreneurial firms by most definitions of the term. Four core themes emerge from the literature and provide a framework for the research, namely, power, process, partnership, and people. The research approach was qualitative, and conducted over a period of twelve months. The paper ends with an agenda for future research.