基于STC单片机的智能化病房温控系统设计与实现

该文以搭建具有模块化、智能化、精确化性质的病房温控系统为目标,对部分三甲医院现有温控系统展开了具体研究,对其现有问题展开了分析,提出和设计了一种基于STC单片机的智能化病房温控系统;该系统以PC端系统作为上位机端,单片机硬件系统作为下位机端,STC89C51作为单片机主控板块,温湿度测量使用DHT11传感器,室内CO2浓度采用T6713-5K传感器测量,并通过接口将数据传输至单片机,温湿度及CO2浓度等信息通过LCD1602显示屏展示,同时通过PID算法参数调整,实现室温调节,另外上位机端设置蜂鸣器对超出温湿度及CO2浓度阈值的进行预警;经实验测试该系统实现了病房温湿度的有效控制及病房环境数据的可视化;经实际应用满足了部分医院病房温湿度智能化控制要求,使温湿度维持在20℃-25℃和40%RH-55%RH之间     

高校图书馆温湿度光照度无线监控系统设计

针对高校图书馆中环境参数监测范围较广、系统需运行较长时间等要求,采用微处理器,通过选择合理的监测节点,设计并搭建基于ZigBee+GPRS技术的监测平台进行环境监测.系统设备层采集环境数据,控制层根据设定程序对调节层中的空调、灯具、遮阳板等设备进行自调节;远程客户端可通过以太网进行数据查询和控制.通过研究实验数据,借助SPSS软件的描述性分析、探索性分析以及聚类分析对监测数据进行统计分析,得出监测数据的可靠性及验证了平台能长期实时监测环境数据的功能.并通过实验室模拟控制实验,验证了系统能很好地进行自控制调节,系统的硬件和软件程序可靠,操作方便,数据科学,具有推广应用价值.     

一种基于物联网校园智能用电监测系统的设计与应用

基于物联网技术、低功耗无线通信技术、大数据云平台,设计一种基于MQTT(消息队列遥测传输)协议的校园智能用电监控系统.系统包括智能用电管理终端、后台系统服务器、Web端管理平台、APP管理平台.实现校园用电监测,通过Web端或者手机APP端进行监控与控制,提高电源能耗控制.     

自动变速器电磁阀液压测试的数据采集系统设计

为了模拟电磁阀实际工作时的压力等环境,在硬件电路的基础上设计了一个自动变速器电磁阀液压测试的数据采集系统.该系统能够利用压力传感器对压力调节电磁阀的输出端压力进行实时采集,通过外接电源对其输出端压力进行控制,并通过串口通信在上位机上进行波形显示与数据保存,最后,结合卡尔曼滤波算法对系统进行分析,得出设计的系统具有稳定性和可控性的优点.     

基于ARM的无线数据传输病房监护系统

本文设计了一款基于ARM的无线数据传输病房监护系统,该系统采用了多种生物医学传感器相结合的原理,可以对病人的体温、心率(脉搏)、呼吸频率等人体生理参数进行实时检测,还可利用烟雾传感器对病人在病房内是否吸烟或者病房发生火灾进行实时监测,并将监测到的数据通过无线射频模块发送到监控中心,医护人员通过查看监控中心里的数据,便可实时监测病人的身体情况并能及时了解追踪患者的病情。     

电石炉电极参数实时监测系统设计

在电石生产过程中,电石炉内温度的调节是通过控制电极的工作长度实现的。电极工作长度的实时监测对电石生产具有重要意义。采用基于LabVIEW编程实现的监测系统对液压缸压力、电极升降位移和压放量进行测量,间接实现了电极工作长度的自动检测。监测系统人机交互界面友好,操作方便。现场试运行表明,系统性能稳定、可靠性高。该系统对于降低能耗、提高产品质量和保证生产安全具有一定的现实意义。     

AVR32的便携式无线医疗点滴监控系统

为了解决医疗点滴安全性监控问题,设计了一种基于AVR32 UC3A系列单片机的嵌入式便携无线医疗点滴监控系统.以无线通信方式实现主控制端对各病房终端的远程在线监控,动态掌握点滴状态.系统主要由手持式控制端、终端监控装置和nRF24L01无线收发模块组成.文中详细介绍了系统的设计原理及软硬件组成结构.     

基于UCC28019的高功率因数电源设计

本设计给出了以TI公司的PFC控制芯片UCC28019为核心的功率因数校正的基本原理和实现方法。系统主要由取样电路、功率因数校正以及控制和显示电路几个模块组成。该设计的特点在于首先通过监测电路对电路进行监测,然后根据监测结果,运用控制电路来调节PFC控制芯片UCC28019的电压误差放大器大小,从而稳定输出设定电压,通过调节电流误差放大器的输入来提高电源功率因数。     

基于力位协同控制的航天器多路射频频谱监测系统设计

目前设计的航天器多路射频频谱监测系统采样间隔时间过长,导致监测结果与实际结果相差较大;为了解决上述问题,基于力位协同控制设计了一种新的航天器多路射频频谱监测系统,设计该监测系统的硬件和软件;在频谱分析仪的使用界面上,具有大量的射频信号控制命令,其中包含部分接口命令,通过该接口命令监测和控制频谱分析仪;单片机自带控制器,可协助系统的控制单元控制频谱;控制单元内的驱动接口电路其核心为76JG632芯片,主要对单片机内的各种接口进行供电;通过多路射频信号频谱切换、多路射频信号频谱显示、射频信号频谱监测实现软件流程;实验结果表明,所设计系统扫频和随机扫频采样的时间间隔分别为30 s和50 s,保证监测结果与实际结果吻合.     

基于网络节点输出速率调节的非线性拥塞控制及稳定性鲁棒性分析

该文针对计算机高速互联网中最大服务交通流即能控交通流的拥塞调节问题,提出了一种基于网络节点输出速率调节的非线性拥塞控制机制并对其进行了稳定性和鲁棒性分析。克服了传统的基于输入端控制需要信源端和传输通道多重支持的约束。在单个节点的业务流模型基础上,将信源输入视为系统的扰动,通过调节输出速率来控制节点队列稳定。运用OPNET仿真软件对其进行了不同输入和工作条件下的仿真,结果显示,在所设计的非线性模糊PID队列控制机制下,队列稳定性好且具有较好的鲁棒性和抗干扰性。     

Evidence-based recommendations for building better bras for women treated for breast cancer

Participating in exercise is beneficial for women who have been treated for breast cancer. However, not being able to find a comfortable exercise bra can be a barrier to exercise participation. This study aimed to systematically investigate what breast support women treated for breast cancer want when they exercise in order to provide evidence-based recommendations to improve exercise bra designs for these women. Based on 432 responses from a national online survey, frequency and relationship data were analysed (binary logistic regression) to understand exercise bra issues pertinent to this population. These issues included being able to control for asymmetrical cup sizes, managing heightened skin sensitivity, managing fluid (size) fluctuations, managing a prosthesis and restoring body image by restoring shape. This study provides evidence-based recommendations to inform an exercise bra design that will meet the unique needs of women treated for breast cancer. Rigorous, evidence-based evaluations of exercise bras for women treated for breast cancer may contribute to their well-being and quality of life through enhanced designs.     

一种SIP穿越NAT的解决方案

NAT使得SIP端到端的应用变得非常困难,文章分析了几种SIP穿越NAT方法及其不足,提出了一种基于STUN和TURN方法的穿越方案.其基本思想是根据NAT的不同采用不同的方式实现SIP信令的穿越,而媒体流的穿越则通过对所有可用媒体地址进行连接检查来实现.方案不改动现有NAT,在应用层上实现了对所有NAT的有效穿越,避免单独使用其它方法带来的缺陷.     

Grammar engineering for multiple front-ends for Python

In this paper, we describe our experience in grammar engineering to construct multiple parsers and front ends for the Python language. We present a metrics-based study of the evolution of the Python grammars through the multiple versions of the language in an effort to distinguish and measure grammar evolution and to provide a basis of comparison with related research in grammar engineering. To conduct this research, we have built a toolkit, pygrat , which builds on tools developed in other research. We use pygrat to build a system that automates much of the process needed to translate the Python grammars from EBNF to a formalism acceptable to the bison parser generator. We exploit the suite of Python test cases, used by the Python developers, to validate our parser generation. Finally, we describe our use of the menhir parser generator to facilitate the parser and front-end construction, eliminating some of the transformations and providing practical support for grammar modularisation.     

Regional Process Modeling for Design for Environment

This research is an effort towards providing higher level Design for Environment (DFE) tools for a broad industrial region. Issues ranging from the levels immediately above existing design tools, to the envisioned highest level for a broad geographical region are discussed. A tool for the regional planning of the DFE activities is proposed, considering a model construction based on material flows across the industry. The Multi-Lifecycle approach is supported by organizing the input/output flows for industries, potentially utilizing waste material, side products and recycling. Capitalizing on the conceptual integration of the design and process activities, an Abstract Design Environment is used for the design of the basically process oriented material flow tool. Within the context, the relations among design, process and flow-modeling concepts are discussed.     

Louvers design for LED displays for sunny days

The use of louvers attached to variable information display needs to be optimized taking into account different intrinsic and extrinsic parameters. The analysis of the performance of the display–louvers system takes into account the location, orientation, and daily and seasonal variations. The observation of the system is divided depending on the distance of observation. The far distance vision performance use the background luminance. The medium distance performance needs the use of the Contrast Sensitivity Function of the eye.     

学以致用 创新发展

<正>ADI公司2007大学生创新设计竞赛颁奖典礼暨媒体见面会侧记高性能模拟集成电路制造商ADI公司于2007年11月6日在北京工业大学(BJUT)举办"2007年度ADI大学生创新设计人赛"     

为奥运喝彩为中国加油美齐九款液晶齐降价

全球瞩目焦点2008北京奥运会已经开幕,美齐和所有中国人一起,为此次盛会的成功开幕欢欣鼓舞.与此同时,为了与广大消费者共享奥运激情,美齐(JEAN)宣布,在奥运期间举办"为奥运喝彩"的降价促销活动,一举将旗下的JT178R、JT198R、JT198F、JT209RP、JT229RP、JT229OP等九款显示器进行全面调价,价格下调幅度更达200元到300元.美齐期望能通过此次活动,与广大消费者进一步分享奥运带来的喜悦,共同祝福北京奥运会圆满成功!……     

Design for All in multimedia guides for museums

The Design for All principles define the characteristics which a device should possess in order for it be utilised by every type of user, independent of his or her sensory disabilities or technological competency. These principles are realised in the current work as an integrative tool with which to facilitate universal access to museums via multimedia and portable guides, making access available to all. Based on these principles, this article describes the main findings of the design and use of the MGA (Multimedia Guides for All) approach proposed in this paper. This approach involves a series of recommendations for the selection, application, preparation of content, and maintenance of this type of computerized device, in order to achieve these principles. Firstly, a comparative analysis of the principal types of electronic guides available in museums which incorporate accessibility criteria is provided. Subsequently, a real case study case is presented which conforms to the MGA approach. The MGA approach can be applied to other domains, which should be explored in further research. The conclusions in this article have been drawn from two R&D projects financed by the Spanish Ministry of Industry, Science and Technology supported by the EC FEDER R&D Program.