跳频对GSM网络容量的贡献

本首先提出了射频跳频技术是提高网络容量的关键技术。在此基础上，以跳频为着眼点，分析并量化计算了跳频对干扰的改善度，同时根据跳频对容量的影响，给出现有技术条件下GSM网容量的极限。     

无线局域网技术及应用

无线局域网技术是目前发展迅速的技术，相对于有线局域网有许多优点。随着无线网络产品性能的提高和价格的不断下降，无线局域网技术有着广泛的应用前景。据此对无线局域网的基本概念、特点及其技术作了简单的介绍，提出了无线局域网面向应用的几种解决方案，并对发展前景作了预测。     

《无线电频率划分规定》学习心得

主要介绍学习新的《无线电频率划分规定》的目的，《无线电频率划分规定》的特点，作了哪些重要修改和划分表的主要内容及如何贯彻执行《无线电频率划分规定》。     

The mirror effect and mixture signal detection theory.

The mirror effect for word frequency refers to the finding that low-frequency words have higher hit rates and lower false alarm rates than high-frequency words. This result is typically interpreted in terms of conventional signal detection theory (SDT), in which case it indicates that the order of the underlying old item distributions mirrors the order of the new item distributions. However, when viewed in terms of a mixture version of SDT, the order of hits and false alarms does not necessarily imply the same order in the underlying distributions because of possible effects of mixing. A reversal in underlying distributions did not appear for fits of mixture SDT models to data from 4 experiments. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

OFDM-MIMO系统及其频率同步分析

多媒体业务对无线通信的带宽与品质提出了更高的要求，OFDM和MIMO由于满足了这一需求被越来越多的无线通信标准采用所为底层的调制和传输技术。频率同步问题是OFDM—MIMO物理层设计中正确解调的前提和基础，本文介绍了OFDM—MIMO的原理、特点和频率同步问题的研究现状。     

三维有限元法分析频率对接地电阻的影响

提出了用涡流场的A-V有限元分析方法计算接地系统接地电阻的方法,分析了入地电流频率的变化对接地电阻的影响。计算结果表明,频率对接地体自身电阻的影响较大,但对散流电阻的影响很小。     

The time course of spoken word learning and recognition: Studies with artificial lexicons.

The time course of spoken word recognition depends largely on the frequencies of a word and its competitors, or neighbors (similar-sounding words). However, variability in natural lexicons makes systematic analysis of frequency and neighbor similarity difficult. Artificial lexicons were used to achieve precise control over word frequency and phonological similarity. Eye tracking provided time course measures of lexical activation and competition (during spoken instructions to perform visually guided tasks) both during and after word learning, as a function of word frequency, neighbor type, and neighbor frequency. Apparent shifts from holistic to incremental competitor effects were observed in adults and neural network simulations, suggesting such shifts reflect general properties of learning rather than changes in the nature of lexical representations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

液晶电控效应的实验研究

详细阐述了液晶的电光效应,介绍了利用分光光度计测量液晶透射比的方法。通过改变加在液晶盒上的电压大小及其频率高低,详细测量了液晶的透射比。通过做图分析了液晶的电控双折射效应,得出液晶的透射比随所加电压的大小和频率的高低而变化,以及液晶的阈值电压随频率的增高而减小的规律,这对液晶器件的设计与研究均具有一定的参考价值。     

变频调速技术在污水处理厂的应用

概述污水处理厂的一般工艺，简单介绍了风机、水泵等的节能特点，介绍了变频调速装置在污水处理厂各处理工段的应用。     

数字频率合成技术在地球站中的应用

数字分频式微波频率合成器,具有结构简单,造价低,良好的低相嗓特性等优点,因而被通信卫星地球站所广泛采用。论述了数字分频式频率合成技术在工星通信地球站中的应用,提出了采用高度集成锁相环器件:PE3336设计一种低相噪特性的微波数字频率源的工程实例,并将之用于某通信卫星转发器地球站设备中。