扩频通信系统中弱信号检测研究

介绍了一种用于扩频通信系统微弱信号检测的新方法。该方法利用了正弦函数的特殊性质，在信号未知的情况下，通过多次自相关运算成功的检测出埋没于强大噪声中的微弱正弦信号。具有理论推导简单、物理意义明确、计算量小等特点。还给出了具体信号的仿真结果。     

Models for a sinusoidal angular modulation index meter

Models are considered for a multichannel sinusoidal angular modulation index meter for a continuous radio signal, which employs amplitude detection for the spectral components. An analysis is presented of the errors in measuring the index. Areas of possible application are indicated. __________ Translated from Izmeritel’naya Tekhnika, No. 3, pp. 22–25, March, 2006.     

一种基于改进的DSE-CMA算法的盲多用户检测

提出了一种基于改进抖动符号误差恒模算法（Modified Dithered Sign—Error Constant Modulus Algorithm,MDSE—CMA）的盲多用户检测算法。抖动符号误差恒模算法（Dithered Sign—Error Constant Modulus Algorithm,DSE—CMA）稳态性能好，但其过量的均方误差使得收敛速度较慢。MDSE—CMA算法通过引入符合正弦概率密度分布的抖动信号来减少均方误差。基于该算法的多用户检测方法与DSE—CMA算法相比，收敛速度加快。仿真证明，提出的方法在码分多址（Code Division Multiple Aceess，CDMA）异步多径信道下可有效地抑制多址干扰和克服多径衰落。     

仿真转台电液伺服系统的线性优化

本文运用正弦型伺服系统优化理论对正弦型伺服系统进行了线性优化,建立了优化模型,编制了优化程序.对实际系统进行了仿真研究和分析,且通过实例说明该方法是简单实用的.     

Do Behavioral Disturbances in Persons With Alzheimer's Disease Predict Caregiver Depression Over Time?

Random effects models were used to examine the association between behavioral disturbances in persons with Alzheimer's disease (N = 90) and caregiver depressive symptoms at 2-month intervals over an 18-month period. There was substantial variability in trajectories of change in caregiver depressive symptoms over time but no systematic increase in distress despite increased severity of dementia symptoms. Total behavioral disturbances were associated with higher levels of caregiver depressive symptoms: this effect was primarily attributable to aggressive behaviors. No consistent departure from linearity was evident in the relationship between behavior and depression over time. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Tranquilizers and experimental psychopathology: A comment.

A bibliography is presented in discussing that "Thorazine can be used in conjunction with the experimental method to control certain secondary manifestations of emotional and mental disturbance so that basic psychopathology is more clearly revealed in psychological test scores." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

General overview of steady-state (small signal) stability in bulk electricity systems : A North American perspective

The most recent North American concepts of stability are discussed. Conditions in which problems of small disturbance stability have been encountered or have been noted to occur in North America, are then reviewed. Comments are made on small disturbance stability engendered by continuously acting, high gain, excitation systems, and this is followed by a review of analytical approaches considered pertinent to the study of this type of stability. The paper concludes with some specific examples of analysis applied to the Ontario Hydro bulk power system.     

Psychiatric versus psychological opinion regarding personality disturbances.

Results of a survey "designed to determine, at least to some extent, the degree of diversity and disunity of opinion between" psychiatrists and psychologists are presented. An objective questionnaire, consisting of 100 "declarative statements covering the nature, cause, and treatment of disturbances to the mental life and behavior of individuals, with chief emphasis on characteristics usually identified as psychotic and neurotic" which were representative of current opinion, was used. 75 psychiatrists (32 working in mental hospitals in Pennsylvania and New Jersey and 43 practicing psychiatrists in 21 states and the District of Columbia) and 60 psychologists (in 23 states and the District of Columbia) were the Ss. "Only 19 statements of opinion, out of the 100 explored in this study, reveal statistically significant differences of opinion between psychiatrists and psychologists." Psychiatrists show a higher degree of acceptance on 14 items, psychologists a higher degree of acceptance on the other 5. The specific items on which differences were indicated are presented. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

矩形管道内高分子减阻液的减阻特性

在设计较高稳定度矩形管道流动系统和可控人工扰动设备基础上,通过有效地率定管道断面尺寸,对高聚物(PAM)减阻液的减阻特性,特别是反应点和极限减阻线进行实验研究,为以“聚合物层流”存在为基础的减阻机理假说,提供矩形管道内的实验证据及实验基础.     

原位测试在施工对土体扰动研究中的应用

介绍了土体受施工扰动的原位测试方法包括：静力触探法、十字板剪切法和TDR,基于每种方法的基本原理,分析了土体受扰动的检测指标,论述了每种方法的优点、不足之处以及改进措施,从而促进施工对土体扰动的研究。