基于单片机的教室照明节能控制系统

从节能的角度出发，针对学校照明用电浪费严重的问题，利用照度检测和红外探测相结合的主动与被动的探测方式，开发教室照明节能自动控制系统，实现教室元人或者光照充足时自动关灯、有人到来且光照不足时自动开灯的功能，达到节能的目的。     

一种远程红外智能照明控制系统的设计

为了实现高校教室内人员数量和照明状态智能控制与远程监视,根据高校教室照明要求和使用特点,利用红外传感器技术和远程通信技术,完成了高校教室远程红外智能照明控制系统的设计.实际测试表明,该系统人员出入识别和人员数量计算准确,状态信息远程反馈及时,照明配置合理,满足高校教室远程智能照明控制的要求,降低了运行维护成本,具有一定的实用价值.     

基于物联网高校能耗智能化监控系统

利用物联网物物相连的特点,设计了廊道、教室的智能化照明,水电能源的智能化管理以及监控系统,解决了高校水电能源的浪费问题。     

基于AT89S51单片机节能灯的设计

教室节能灯智能控制系统以AT89S51单片机作为控制装置的智能部件,采用热释电红外人体传感器检测人体的存在,采用光敏电阻构成的电路检测环境光的强度.根据教室合理开灯的条件,系统通过对人体的存在信号和环境光信号的识别和智能判断,完成对教室照明回路的智能控制,避免了教室用电的大量浪费.     

智能网络化教室管理系统的设计与开发

教室作为高校在校生每天接受知识的重要场所,具有教育教学中不可替代的作用。然而,随着办学规模的扩大,且教室在日常使用和管理中存在的供暖和照明浪费、管理人员疲劳等问题,如何高效的对教室进行管理成为亟待解决的问题。针对这一情况,设计并开发了一种基于ZigBee物联网技术的智能网络化教室管理系统,系统由管理中心计算机、校园网、协调器、终端设备和传感器模块等组成,可以实现教室的分时分温,按需照明,安全门禁等控制功能。系统具有无需布线、低功耗、自动组网等特点,实现了教室节能和安全管理等功能,提高了管理效率,能够满足高校教室管理智能化,节能化的要求。     

基于单片机的教室节能控制系统设计研究

目前,高校教室照明系统存在严重电能资源浪费现象,在这种背景下对高校教室现有的能源资源调配管理系统进行技术升级改造研究就显得非常重要。本文设计了一套基于单片机和CAN总线的高校教学楼教室节能控制系统,通过传感器将教室内部的光照强度、人员数量等信号数据采集到单片机系统中,由单片机实现教室灯光等资源的合理调配节能经济控制管理,从而达到节电节能经济运行的技术升级改造目的。     

小型公众室内空间照明控制系统设计

在公众场合,照明用电往往存在大量浪费,本文设计一款使用单片机控制公众室内空间的自动化系统,采用人体热释电红外传感器对进出人员自动进行信息采集,用单片机收集信号并进行计数,根据人数对室内的照明进行控制,同在数码管上显示出来人数;便于管理员的管理。     

节能公路隧道系统及模型

设计的太阳能智能供电系统、触发式LED照明以及红外测速LCD显示系统,可解决传统隧道照明系统存在的能源浪费大、环境污染高、安全程度低等问题。提高了能源利用效率和车辆进入隧道的安全性。     

教室灯光智能开关控制系统的研究

本文针对目前高校教室"全亮灯""白昼灯"等电能浪费现象,设计了一款教室灯光无线智能开关控制系统。该系统由信息采集系统和灯光控制系统两部分构成,信息采集系统中的热释红外检测模块完成人体存在信息的采集、光敏传感器模块完成光强信息的采集;nRF24L01无线发送、接收模块完成信息数据的传送;灯光控制系统中的继电器、振动传感器模块完成对教室灯光的智能化控制。系统具有自动和手动两种工作模式,能够实现自动熄灭灯光的功能。研究表明:该系统能够大大地提高教室的节能效果和管理的智能化程度。     

基于AT89S51和RE200B的教室照明节能控制系统设计

为了实现对教室照明系统的智能控制和节约用电,设计了基于单片机和热释电红外传感器的教室照明节能控制系统.该系统以AT89S51单片机作为主控芯片,利用人体的恒温特性,采用热释电红外传感器RE200B探测人体的存在,用光敏电阻检测当前环境的光照强度,对教室照明灯实行分区控制的策略,从而实现了对教室照明系统的智能和节能控制.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has