Variability among males in sexually selected attributes.

Greater male than female variability is found in behavioral and morphological traits in animals. A theory that greater male variability is associated with variability in parental investment is described and contrasted with sexual strategies theory, which posits no sex differences in variability. Predictions from the theories were tested through meta-analyses of variance ratios for data sets involving sexually selected characteristics analyses (physical aggression and 5 aspects of mate choice) and 2 unlikely to have resulted from sexual selection (anger and self-esteem). Variation was significantly greater among men than women in 5 of the 6 former data sets and was similar for men and women in the latter 2 data sets, broadly supporting the predictions. A further analysis extends the theory to intellectual abilities. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

时空域三维结构图象噪声及信噪比测试

微光ＣＣＤ电视系统性能测试是微光成象技术的重要组成部分。本文提出了时空域三维结构图象噪声的测试模型，建立了测试和分析系统，对微光ＣＣＤ电视系统信号和噪声进行测试与分析，并且分别给出了时间域噪声和空间域噪声分布情况的三维曲线。     

沈阳市南北运河及沿河公园市民意象调查

运用行为心理学的相关理论以及调研方法对沈阳市环城运河水系绿化及景观的设计实施进行调研,以及通过本次调研结果的分析得出了沈阳市环城运河水系绿化及景观的总体意象.     

水文缆道支架上架设无线电台天线方法简介

本文介绍了根据各水文站的现有设备情况，节约新建通讯塔费用，又增加无线电台天线的高度和稳定性，因地制宜地在水文缆道支架上接通讯操作平台，安装无线电台天线的方法。     

软件无线电技术在军事领域的应用

概要介绍了软件无线电技术产生、发展的背景和现状.描述了软件无线电的工作原理,对软件无线电技术和传统无线电技术的优缺点进行了比较.并对软件无线电技术的先进性、经济性以及未来的发展趋势进行了探讨.     

基于无线电测向的台站定位

无线电定位技术有看广泛的应用前景，基于无线电测向的台站定位，推导出了平面和球面双站定位算法，给出了多站定位算法，并对以上算法进行了实例计算，验证了算法的正确性。平面和球面台站定位算法对于台站定位有很好的实用性，尤其是球面定位算法对于提高定位精度有很大的作用。     

cdma 2000 1xEV-DV中的无线资源管理技术

资源管理策略是系统资源能否被有效利用的重要环节，本文对cdma2000 1x的演进版本1xEV-DV中涉及到的无线资源管理方面的新内容进行了探讨。     

Eye movements in reading: Perceptual and cognitive processes.

This article discusses the variability of eye movement behavior. The variability exists between readers, so that the average fixation duration for sonic readers my be around 200 ms and for other readers it may be closer to 300 ms; the average saccade length for some readers may be 6 letter spaces, while for others it may be closer lo 10 letter spaces; and some readers rarely regress while others regress quite frequently. These eye movement characteristics can also be influenced by text difficulty; more difficult text leads to longer fixation durations, shorter saccades, and more regressions. More important than the between reader variability is the within reader variability that exists with each of these measures. The article also discusses research on eye movement during reading. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

中国最大跨垂比延伸水平井流花11-1-32ERW井钻井工艺

流花 1 1 - 1 - 32大跨度延伸井完钻井深 5 2 94m ,跨度 4 80 1m ,水平段长 90 5m ,跨垂比5 .52 ,是迄今为止国内最大跨垂比延伸水平井。通过对该井工程设计与施工 ,以及所应用的套铣回收套管、旋转导向钻具和套管漂浮技术等进行简要介绍 ,力图对水下井口作业和类似的大位移井作业所需考虑的技术难度、工程准备和施工过程中所采取的技术措施以及遇到的实际问题进行初步总结 ,以期为今后设计和实施类似的大跨垂比延伸水平井提供参考     

Long-Term Memory Deficits in Schizophrenia: Primary or Secondary Dysfunction?

Long-term memory impairment is often found in schizophrenia. The question remains whether this is caused by other cognitive deficits. One hundred eighteen first-episode patients were compared with 45 control participants on several memory tasks. The role of processing speed and central executive functions on memory performance was examined with regression analysis for all participants and for patients separately. Deficits were found in general verbal learning performance and retrieval in episodic memory and semantic memory. Processing speed reduced disease-related variance in all memory variables. Coordination, organization of information, and speed of processing were the best predictors for long-term memory deficits in patients. The amount of explained variance, however, is small, especially in general verbal learning performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)