Intel80C196MC在交流变频空调中的应用

Intel80C196MC是Intel公司专门为三相交流电机变频调速开发的CPU。具有被称作WFC的波形发生器，可以直接驱动逆变器的6个开关器件。本文提出使用80C196MC16位单片机作为变频空调室外控制电路的CPU，驱动智能功率模块IPM，以实现对空调压缩机的控制，提高了压缩机的工作性能并达到节能效果，同时给出了部分主要电路原理图。     

三相变频移相程控电源信号电路的设计

介绍了一种作为同步发电机励磁电源的三相变频移相程控电源，着重说明了电源的中心环节信号合成电路的工作原理和８０９８单片机的作用。     

古代汉语词类活用说思辨

“词类活用”是古代汉语中客观存在的常见现象,也是古代汉语研究中的一个重要语法理论。文章对这一理论重新进行了修正和规范,指出应多方位考察词类活用现象。     

DPLL implementation in carrier acquistion and tracking for burst DS-CDMA receivers

This paper presents the architectures, algorithms, and implementation considerations of the digital phase locked loop (DPLL) used for burst-mode packet DS-CDMA receivers. As we know, carrier offset is a rather challenging problem in CDMA system. According to different applications, different DPLL forms should be adopted to correct different maximum carrier offset in CDMA systems. One classical DPLL and two novel DPLL forms are discussed in the paper. The acquisition range of carrier offset can be widened by using the two novel DPLL forms without any performance degradation such as longer acquisition time or larger variance of the phase error. The maximum acquisition range is 1/(4T), whereT is the symbol period. The design can be implemented by FPGA directly. Project (No. 60002003) supported by the National Natural Science Foundation of China     

国际大赛中男女皮艇运动员划桨节奏的比较研究

采用现场摄影法,比较世界杯赛中男女皮艇运动员的桨频和划桨节奏。结果显示：男桨手左右两侧的桨频比较和女桨手左右两侧的桨频比较均无差异;大赛中实际应用时两侧计算桨频无差异。动作节奏上．男桨手左右两侧和女桨手右侧无差异;只有女桨手左侧与前三者有差异,可能是女子两侧专项素质发展及技术完善的同步性不如男子。男桨手提高桨频可能靠减少回桨时间而女桨手靠减少拉桨时间获得;高桨频时男桨手容易保持水中效果而女桨手容易丢失效果。     

光声谱学及其应用

从热力学角度介绍了光声效应的产生机制，并设计出简单的实验装置，从实验上验证了理论的正确性，对光声谱学作了简单介绍．     

加强高校领导干部经常性思想政治教育探析

切实加强高校领导干部经常性的思想政治教育,是巩固保持共产党员先进性教育成果的需要;是由他们在高等教育事业中的地位作用和少数领导干部思想政治素质不过硬的现状决定的。必须切实加强对高校领导干部进行以马克思主义基本理论、马克思主义世界观、宪法和“宗旨”、廉政勤政为主要内容的思想政治教育。     

The Influence of Device Access and Gender on Children’s Reading Frequency

We explore the role that devices currently play in children’s book reading, finding that while children have relatively high access to devices with eReading capability, these devices are underutilised for reading purposes. While ownership of devices was negatively associated with reading frequency for both genders, its negative impact was more significant for girls than boys. We also found that when boys and girls identified themselves as daily readers, and where they had access to devices, they did not use them frequently for book reading, suggesting that paper book reading is still preferable for frequent book readers of both genders.     

主题词组合新颖性与论文学术影响力的关系研究

[目的/意义] 研究学术论文内容的组合新颖性与其学术影响力的关系,为研究论文的学术影响力提供新的研究视角。[方法/过程] 采用文本挖掘方法对论文题目、摘要和关键词中的主题词进行提取,通过构建领域主题词共现网络,为每篇论文设计了新颖组合率、中等组合率和常规组合率3个指标,将领域论文划分为不同的新颖性/常规性类型,然后对不同类型论文中高被引论文所占的比例进行统计分析。[结果/结论] 同时具有主题词组合高新颖性和高常规性特点的论文成为高被引论文的几率显著高于其他类型的论文,因此建议研究者在科学研究中应注重新颖知识与常规知识的适当组合。