石油燃气定购系统

本文介绍了一种实用的石油燃气定购系统,并对系统的组成、工作原理、硬件电路设计和程序流程图作了说明．     

FFT-DMAC: a tone based DMAC protocol

This paper presents the flip-flop tone(FFT)DMAC protocol,a tone based MAC protocol using di- rectional antennas to solve the deafness problem,hidden terminal and exposed terminal problems simulta- neously.It uses two pairs of flip-flop tones .The first pair of tone is to send omni-directionally to reach every neighboring node to announce the start and the end of communication,and therefore to alleviate the deafness problem.The second pair of tone is to send directionally towards the sender.It is used to sol...     

浅谈语料库应用的几个方面

This paper demonstrates respectlly the importances of abiding by the courtesy principles of English on telephone,writing and negotiation and presents the methods to make diction tactful and tone mild during business English communication.If we use the principles skillfully,it can help both sides to establish business relations on the basis of equality and mutual benefit.     

基于单片机平台下语音识别技术的应用方式

语音识别技术被广泛应用到各个领域，而利用单片机来实现语音识别成为一种经济快捷的应用方案。该文从介绍语音识别的基本原理出发，论述了利用单片机实现语音识别技术的硬件基础及软件基础，并且通过一个典型的应用实例来说明其应用方法及技巧。     

音乐错觉研究进展

概述了音乐错觉研究的历史,归纳和总结了国外学者在音乐错觉研究中已取得的研究成果。将音乐错觉研究成果归纳为2大类：第一类为双通道音乐错觉,包括八度错觉和音节错觉;第二类为半八度错觉,并介绍了半八度错觉与语言的关系的研究。指出当前音乐错觉研究所处的状态以及今后研究的方向。     

An Accurate Characterization of CRT Monitor (II) Proposal for an Extension to CIE Method and Its Verification

According to the ICC specification that is widely used for storing colorimetric characteristics of imaging devices for the current color management systems (CMSs), CRT monitor characteristics can be described by the tone reproduction curves (TRCs) of the red, green and blue channels and a transformation matrix from linearized RGB values to tristimulus values. This idea is based on CIE Technical Report 122#x2013;1996: #x201C;The Relationship between Digital and Colorimetric Data for Computer-Controlled CRT Displays,#x201D; which resulted from the research by Berns et al. This method produces very accurate results under normal conditions. However, users often change the settings of contrast or brightness knobs to a different position from the factory default adjustments. For some of these cases, the characterization method described in the CIE 122 does not produce accurate results. In this paper, we propose an extension to the CIE method for such cases. We investigated the effect of user controls on CRT monitor characteristics at various settings, and verified that our method produced accurate results under any conditions.     

灰阶编码掩模制作微光学元件

提出一种基于改变灰阶编码掩模的单元形状和位置的掩模设计新方法,并根据成像过程中的非线性因素,用这种方法对掩模图形进行了预畸变校正,根据部分相干光成像理论和抗蚀剂曝光显影模型,模拟计算了这种灰阶编码掩模产生的空间光强分布和光刻胶上的浮雕结构,采用电子束曝光系统制作了这种掩模,并在光刻胶上获得具有连续面形的微透镜的阵列。     

击剑运动在高校高水平运动队中开展的现状分析

高校击剑运动的开展还处于初级阶段，整体形势不客乐观，探讨解决对策：应建立后备人才体系、在中学中普及击剑运动，完善竞赛体制，提高教练员训练水平，通过多种渠道筹集经费，以促进高校击剑运动的可持续发展。     

萍乡城关地区普通话语音训练策略之声调部分

本文是萍乡(城关)方言语音研究系列论文之一,通过研究萍乡城关话与普通话在声调调值方面存在的明显差异,为萍乡城关地区人们学习普通话提供有效的训练策略。