用单片机实现声级计智能

<正> 一、概述声级计又称噪声计,是用来测量声音的声压级或声级的一种仪器。声级计可以用来测量机械噪声、车辆噪声、环境噪声以及其它各种噪声。声级计按其用途可分为普通声级计,脉冲声级计,积分声级计等。按其测量精度可以分为四种类型:O型声级计(精度±0.4dB),Ⅰ型精密声级计(±0.7dB),Ⅱ型和Ⅲ型     

环境噪声可视化中的声线追踪法

针对环境噪声声场建立及其可视化,研究了基于预测模型的声线追踪过程.首先提出线声源有约束二次离散算法,通过考虑声源周围障碍物群对线声源离散过程的影响,使离散结果能够较好地等效线声源能量的连续分布特性;其次给出了直达声线、绕射声线和反射声线追踪过程,提出针对反射路径树的二次剪枝算法来实现大范围多次反射求解,并给出剪枝判据.通过在噪声地图系统中的应用可以看出,该方法能较好地降低声源离散误差,并能在复杂城市环境下准确地对3类声线路径进行追踪.     

基于宽带专线网络状态自动监测与报警系统的设计

采用计算机网络编程技术,设计并实现对专线网络状态的实时自动监测与报警系统,主要包括专线网络实时自动监测、多种报警等功能,并就每种功能进行了多种实现方法的探讨。所生成的业务系统能完成对宽带专线业务网络的自动监测与报警功能,从而可以减少宽带专线网络的故障时间,有效地提高了气象信息的传输率,减轻值班人员的劳动强度,同时细化了宽带网运行质量的检查与考核.     

荆江航道能见度实时监测与报警功能设计与实现

介绍了以荆州区域自动气象站网为实验和开发平台,采用数据库、网络及计算机编程技术,完成了荆江航道能见度实时观测数据的自动监测与报警功能设计与实现,包括系统结构及功能、航道能见度的实时自动监测、报警阀值在线判定、多种报警等功能.     

煤矿安全监控系统联网和应用

通过联网方式把多个矿井、不同厂家的煤矿安全监控系统的数据集中到一个独立的数据中心,实现在线实时监测、实时报警、数据查询、打印.并在此基础上,进一步改进或增加应用,在中心可以实现设备安装的实时统计、标校记录的统计,对于高值记录进行智能化分析,自动甄别出真正瓦斯超限、标校或干扰故障数据.结果表明,联网及应用提高了集团公司级别的监控信息化管理,实现了监测信息电子化和自动化,成为日常重要的管理手段.     

VB在环境监测系统中的应用

针对密闭环境中的人员安全问题,研究了监测及控制环境内部气体浓度的方法;并基于VB和Access,实现了PC监控界面软件的设计.该软件采用基于ADO的Access访问方法和VB中二维曲线的绘制方法,实现了用户管理和气体浓度记录管理以及密闭环 境内气体的实时监测显示;并通过VB与Excel的连接方法,实现了数据报表的保存和输出.测试结果表明,该上位机软件实现了模拟环境系统的实时监测功能,且运行稳定,可以应用于实际的环境系统中.     

基于动脉张力法和STM32L的24h动态血压计设计

本文介绍了一种基于高灵敏度压力传感器和STM32L芯片的低功耗、高性能的24h连续动态血压监测系统,阐述了系统的工作原理、流程及其软硬件设计.系统通过压力传感器对腕部脉搏波进行实时监测,利用动脉张力法预估血压值,实现了24h连续动态血压监测的效果.该系统具有自动进入低功耗状态、5 min自动唤醒、按键中断唤醒、血压异常报警等功能,克服了传统血压计无法进行24h连续动态血压监测、受偶然因素影响大、实时性差等缺点.     

红外线通道在线监测与管理系统

提出一种基于DSP的红外线通道在线监测与管理系统.该系统能够有效地监测红外轴温探测网,对通信信号进行失真及噪声分析;通过电话网络实时远距离传输故障信息;利用大容量FLASH移动存储器记录故障信息与信号波形;具有自检、自动获取探测站站名、自动校时等功能.实际测试结果表明,该系统满足了技术指标要求.     

基于单片机的工业园区废气监测系统设计与实现

本文针对排放的工业废气进行连续自动的检测,设计了一种工业废气远程监测系统.该系统以单片机为主控,设计了气体传感器检测电路、废气温湿度数据采集电路、光照强度采集电路等,可实现对工业园区的废气的连续自动检测.把测量的结果通过网络发送到服务器上位机中,在系统中还可以实现对多个检测点的在线监测.实际测试结果表明,该系统可有效地监测到有害气体,达到实时预警的目的.     

基于公共电话网络的分布式环境监测系统

采用计算机远程通信与控制技术，利用覆盖极为广泛的公用电话通信网，将独立、分数的环境检测点相连接，构筑城市（区域)环境实时监测网络，实现水、大气、污染源等自动连续监测．完成环境指数的实时采集．实现城市（区域）环境指敦的全天候、24小时监控，及时记录和掌握城市（区域）环境状况，预防和及时发现污染事故。该文介绍了系统关键技术和系统结构设计、功能划分及软硬件实现。     

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。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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。     

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

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     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.