共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
刘源 《数字社区&智能家居》2006,(26)
介绍了一款简易数字温度仪的设计。列出温度传感器DS18B20的基本特性。由于DS18B20具有直接输出数字信号、单总线接口、成本低等优点,将其应用在由单片机AT89C2051为核心的家庭环境监测系统中作为测温探头。给出了相应的硬件接口电路、软件流程及主要程序代码。并针对DS18B20对时序要求十分严格的特点给出了详细的介绍。 相似文献
3.
刘源 《数字社区&智能家居》2006,(9):150-151
介绍了一款简易数字温度仪的设计。列出温度传感器DS18B20的基本特性。由于DS18B20具有直接输出数字信号、单总线接口、成本低等优点,将其应用在由单片机AT89C2051为核心的家庭环境监测系统中作为测温探头。给出了相应的硬件接口电路、软件流程及主要程序代码。并针对DS18B20对时序要求十分严格的特点给出了详细的介绍. 相似文献
4.
多个DS18B20在粮库测温系统中的应用 总被引:4,自引:0,他引:4
介绍了单总线温度传感器DS18B20的性能和特点,利用低功耗、高性能的单片机LPC932构成了粮库测温系统,详细介绍了系统的硬件接口和软件搜索算法. 相似文献
5.
说明了单总线数字式温度传感器DS18B20的性能结构,结合实际应用,用该器件与ARM微处理器构成一个测温系统,并给出了DS18B20的硬件连接及软件编程. 相似文献
6.
温度传感器DS18B20在Proteus中的仿真 总被引:1,自引:0,他引:1
详细介绍单总线温度传感器DS18B20的工作原理、通信协议和使用方法;给出测温程序流程,以及DS18B20在Proteus中硬件仿真的具体实现方法,并对该仿真结果与实验结果进行了比较。 相似文献
7.
DSP和DS18B20的温度测量系统 总被引:3,自引:0,他引:3
本文简要介绍了单总线数字温度传感器DS18B20的特性及工作原理,给出了DS18B20与TMS320LF2407A的接线图并且非常详细介绍了如何用C语言完成比较精确的软件延时程序,从而满足单线总线协议的通信时序,并给出了完整的C语言代码。 相似文献
8.
9.
单总线温度监测网络的设计与实现 总被引:8,自引:1,他引:8
以单总线技术为基础,采用计算机串口、单总线和串口的协议转换芯片DS2480B、单总线数字化温度传感器DS18B20,设计了单总线温度监测网络。分析了DS18B20的结构、ROM命令、功能命令和温度转换精度及其DS2480B的工作原理,给出了通过DS2480实现单总线到计算机串口的接口电路。同时利用DALLAS公司提供的开发工具包TMEXSDK中的动态连接库和API函数,以DELPHI为开发工具,设计了单总线温度监测网络的操作界面。最后指出了本设计存在的问题和改进方法。 相似文献
10.
单总线数字温度传感器在粮情测量系统中的应用 总被引:10,自引:3,他引:7
本文阐述了单总线原理,介绍了单总线数字温度传感器DS18B20的功能特点、内部结构与工作方式.并给出了在粮情测量系统中由DS18B20与AT89C52构成的仓房温度采集网络的硬件原理图及其软件实现。 相似文献
11.
S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
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. 相似文献
12.
European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
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. 相似文献
13.
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。 相似文献
14.
Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
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. 相似文献
15.
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. 相似文献
16.
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 相似文献
17.
David Poole 《Computational Intelligence》1989,5(2):97-110
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. 相似文献
18.
Watts S. Humphrey 《Annals of Software Engineering》2002,14(1-4):39-72
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. 相似文献
19.
基于复小波噪声方差显著修正的SAR图像去噪 总被引:4,自引:1,他引:3
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。 相似文献