基于单片机的红外线电子锁控系统研制

介绍了一种基于单片机的红外电子密码锁系统，使用红外光调制方式，利用单片机技术进行智能解码，实现了通过遥控便可使电子密码锁的密码存储与更改，并在错误密码时实现报警等功能。该电子密码锁抗干扰能力强，信息传输可靠，灵活度高，制作成本低，具有推广价值。     

一种基于光电传感的路径识别智能车

介绍了一种基于红外激光管的快速路径识别智能车系统。系统采用Freescale 16位单片机MC9S12DG128做为核心控制器,并用光电传感器采集道路信息以使智能车行驶于既定道路上。通过计算讨论了舵机转臂长度的取值范围,解决了系统的滞后问题;还以偏距计时与当前速度相结合的方式制定出控制策略,使智能车系统能快速平稳地寻迹行驶。     

基于手机APP的蓝牙通信智能车设计

设计了基于手机APP的蓝牙通信智能车的软硬件,系统采用蓝牙遥控代替智能车的遥控手柄。在硬件方面,该系统以STC89C52RC单片机为核心,稳压电源模块、电机驱动模块、循迹模块、避障模块、蓝牙模块等共同组成下位机。在软件方面,完成上位机手机APP软件程序、下位机单片机程序的编写。通过大量测试,结果表明该智能车系统稳定,能完成反射式红外光循迹,超声波避障以及蓝牙无线遥控,反应灵敏,达到预期目标。     

一种水上行走机器人红外遥控器的设计与实现

讨论了一种水上行走机器人红外遥控器的设计与实现问题,该遥控器可用于遥控WaterDancerⅡ-a型水上行走机器人.基于对功能和性能的考虑,该遥控器采用以红外光为载体、发射控制编码信号、由机器人接收信号并解码的遥控模式.该遥控装置采用集中控制模式,以MSP430超低功耗单片机为主控制器,并使用红外发射管、红外接收头、显示数码管、按键等器件.控制软件采用C语言编制,主要完成遥控信号的编码与调制等功能.该遥控器实现了水上行走机器人的前进、后退、转弯、调速以及自主/手动运行模式切换等遥控功能.实验表明该遥控器实现了设计目标,且性能良好.     

基于MC9S128的摄像头导航智能车的设计与实现

介绍了一种基于摄像头导航的智能车系统设计方法.该系统根据全国大学生飞思卡尔杯智能汽车大赛的设计要求,使用飞思卡尔16位单片机MC9S 128为核心控制单元,设计了传感器、电源、电机驱动、车速检测等硬件电路;利用PID和模糊控制相结合的方式,使智能车能够自动采集、分析引导线信息,控制舵机转向,实现智能车的自动寻迹.     

基于HOLTEK单片机的智能车

为了体现Holtek MCU HT46R单片机在创新性上的应用,我们通过设计智能车来实现.该作品主要功能是实现当按下开关,智能车沿直线行走,当遇到地面边缘或障碍物时,智能车能自动转弯继续前进,达到防跌落和碰撞的功能.本作品的创新之处是体现Holtek MCU HT46R单片机在趣味性上的应用.在此作品上的改进可以作为清洁机器人.     

基于电磁传感器的智能车设计与实现

设计了基于电磁传感器的自动循迹智能车。使用32位单片机MCF52259作为核心控制单元,设计了电源模块电路、停车检测电路、电机驱动电路及信号采集电路,采用PID控制算法使得智能车自动采集路径信息,控制电机加减速、舵机转向,实现了智能车的自动循迹行驶功能。     

红外报警系统设计

基于红外线隐蔽性和保密性高、可昼夜使用，且抗干扰能力强的特点，设计了一种红外报警系统。该系统包括子报警系统和父报警系统2部分，选用被动式红外传感器、单片机及 Microsoft Visual Studio 2008等硬软件工具，实现了系统全部功能，并进行了调试和检验。该系统通过热释电红外传感器检测信号，放大处理后作为输出量传递给单片机，单片机控制发声、报警、闪灯、无线传输、串口通信。最终在电脑上报警系统软件实现了接收信号与报警功能，从而达到了异地双报警的目的。     

基于MPC82G516单片机智能小车教学实验设计实例

以MPC82G516单片机为核心,通过红外传感器、超声波传感器、L298模块和LM2576模块设计了智能小车控制系统,提出了简单高效的巡线和追逐策略.实验测试结果表明,该系统可以准确实现小车寻迹,并能实现两车交替超车领跑功能.整个系统的电路结构简单,可靠性高,可以作为单片机教学平台,便于进行功能扩展.     

基于MC9S12XS128单片机的路径图像识别智能小车

本智能车的设计是以Freescale公司的MC9S12XS128单片机作为系统的控制核心,使用OV7620数字摄像头采集道路信息,单片机分析图像信息后确定行驶路径,再通过舵机来掌控小车的行驶方向。软件控制方面,使用PD算法控制舵机,位置式PID算法控制电机,实现对智能车运动方向和运动速度的闭环控制。整个系统涉及车模机械结构调整、传感器电路设计及信号处理、控制算法和策略优化等多个方面。实验结果表明,设计方案确实可行。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the