共查询到20条相似文献，搜索用时 78 毫秒
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洪源 《河南科技学院学报》2005,33(1):97-98
本文介绍了一种利用单片机AT89C51实现时间显示，多时间段定时报警等功能的智能定时控制系统的设计。具有定时精度高、功耗低、稳定可靠、成本低等特点。 相似文献
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注射泵是一种数字化、智能化的医疗仪器,主要用于临床上实现高精度的输注药液.现在大部分注射泵控制系统的核心器件都采用C51单片机,由于C51单片机的功能和接口有限,为了满足系统复杂的控制要求,需要增加大量的外围电路.但是,外围电路增加的同时也导致了系统体积、功耗、故障率以及成本的增加.提出了一种用新型单片机uPSD3234构建的智能注射泵控制系统,并描述了它的设计思想以及各部分的硬件和软件实现.使用此单片机大大减少了系统外围部件,使整个系统在功耗、可靠性等方面都得到了很大的改善. 相似文献
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针对高校教室照明的特殊性,应用智能控制技术,设计了照明节能控制系统。提出了一个基于AT89C51为控制核心的设计方案。单片机检测背景光强度,若背景光强度较弱启用热释电红外传感器开始探测人体信号。对移动或静止人体红外信号进行探测,实现对教学楼照明智能化控制。 相似文献
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随着电子技术的迅猛发展,用户可以根据需要设计各种不同应用的控制系统。智能灯光控制系统不仅可以满足和实现不同的灯光效果要求,实现照明的高层次智能管理,而且可节约能源,延长灯具寿命,减少用户维护费用。本设计以单片机作为控制核心的现代灯光控制系统;用数码管实现时间的显示设置和闹钟功能;通过电子计算机（PC机）实现远程控制、时钟控制（时间预设、定时关机等方面）及人体感应和串行通信,实现灯光的有效控制。 相似文献
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计算机工程智能控制是一类无需人的干预就能够自主地驱动智能机器实现其目标的过程,是用机器模拟人类智能的一个重要领域。智能控制包括学习控制系统、分级递阶智能控制系统、专家系统、模糊控制系统和神经网络控制系统等。 相似文献
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王燕 《辽宁科技学院学报》2001,3(4):13-14,31
本文论述了串级控制系统的特点 ,串级控制系统的原理 ,以及SLPC智能调节器串级控制功能的实现 ,SLPC智能调节器在锅炉汽包水位控制系统中的应用。 相似文献
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基于51单片机的智能定时控制系统设计 总被引：1，自引：0，他引：1
给出了一种以80C51系列单片机为核心的智能定时控制系统的设计方案,分析了该系统的控制模式、控制电路构成、系统软件设计及其使用情况. 相似文献
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以淋浴房为例,提出并介绍了一种现代智能控制系统的设计方案,以EM78P447单片机为主控核心,对淋浴房的温度、湿度进行实时的检测,通过触摸按键和LCD显示来实现人机操作界面;能够实现电话摘机控制、排风扇的控制、灯光的调节和控制;并提出r淋浴房中的数字收音机系统和收音播放控制,臭氧发生模块的应用和控制,从而引入了智能淋浴房控制系统的新概念. 相似文献
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PLC 控制系统由于可靠性高、运算性能好、扩展性强、抗干扰性高、调试周期短等特点,在电梯智能随动控制系统中被广泛采用;本文利用 FX2N-48MR 实现了电梯的智能控制,整个电梯控制系统对环境的运行要求低,稳定性和可靠性比较高 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献