Perceptual learning of dot pattern

Dot pattern is a type of pattern defined by specific spatial relationship among some dots. As a compensation for concrete and meaningful visual stimuli, meaningless dot pattern can be used as stimuli in learning tasks. We performed an experiment for exploring the perceptual learning process of dot pattern against random-dot background. Participants were required to learn two types of dot patterns (9-dot and 11-dot). They were assigned to two groups: participants in Group 1 learned 9-dot pattern first and 11-dot pattern later, while those in Group 2 learned 11-dot pattern first and 9-dot pattern later. The results showed that participants could acquire the spatial relationship of dot pattern through perceptual learning in relatively short learning time. In comparison with 9-dot pattern, learning time of 11-dot pattern was slightly longer and its accuracy rate lower, but there was significant positive transfer effect from 11-dot pattern learning to 9-dot learning.     

高Tc超导材料Bi_2Sr_2CuO_6和Bi_2Sr_2CaCu_2O_8的晶格振动对称性分析

本文运用群论方法,对高T_c Bi 系超导体中的Bi_2Sr_2CuO_(?)和Bi_2Sr_2CaCu_2O_8的晶格振动模进行了系统的对称性分类.给出了其布里渊区中(?)点,X 点和△线振动模式的对称分解和对称化基.     

一个Markov转移概率函数的确定

利用柯尔莫哥洛夫向前方程计算了电话呼唤次数的随机过程的转移概率函数。     

目标电磁散射特征信号的统计复现

本文讨论了目标电磁散射特征信号的统计复现问题，提出了一种目标特征信号统计复现的新方法，该方法不但可用于目标雷达散射截面（ＲＣＳ）的统计复现，而且适用于目标其他电磁散射特征（如目标角闪烁等），因而可较好地解决目标特征信号统计复现等一类工程问题。     

The Experimental and Theoretical Research of “Local Resonance“ in Ultrasonic Honing System

In 1982, Professor Fang Guoliang found the “Non full resonance“ phenomenon in a tool system while he use the thin-long tool ultrasonically machining deep-small hole. He called it as “local resonance“. Also this “Non full resonance“ phenomenon was discovered in the ultrasonic drilling and the ultrasonic honing system later. To its mechanism, professor Fang thought that the coupling of long-thin tool bar and driving system is weak, so the tool bar can vibrate independently, but the quantitative relation betwe...     

HP3562A动态信号分析仪的计算机控制

本文在分别简要介绍ＨＰ－ＩＢ接口、ＨＰ３５６２Ａ和ＨＰ９０００／３２０及其控制之后，较详细地讨论了ＨＰ－ＩＢ接口总线控制ＨＰ３５６２Ａ和进行数据传输的四种有效方法，并给出了程序实例。本文所述的方法同样适用于对其它ＨＰ－ＩＢ（ＧＰ＿ＩＢ）仪器的控制。     

时分数字同频双工电台及其组网通信系统的设计与实现

本文介绍在波道间隔为25kHz的VHF/UHF移动信道上时分数字同频双工电台及其组网通信系统的设计与实现。文中讨论了系统实现的关键技术,给出了系统硬件和软件的实现方案,分析了系统在高斯白噪声下的误码性能和组网性能。理论和实验表明,系统设计方案是可行的。     

径向电磁轴承的灰色系统控制与数值仿真

应用灰色系统去余控制理论，以径向电磁轴承为对象，提出该轴承的灰色系统控制方法，以实现对转子的稳定控制，并进行了数值仿真。建立了径向电磁轴承转子系统的动力学模型与传递函数，按照灰色系统理论设计了控制系统，由数值仿真结果表明，该转子系统能实现稳定良好的控制效果。     

On Vector Quasi-Variational Inequality Problems in H-Space

The purpose to this paper is to study the existence problem of solutions to the vector quasi-variational inequality for vector-valued functions in H-space.     

思维逻辑转换与翻译

翻译和思维逻辑有极其紧密的联系。逻辑活动贯穿于翻译过程的始终。在翻译过程中,译者需要在原语和译 语间进行思维逻辑的转换。从三个层面上阐述了逻辑转换在翻译中的作用:逻辑对确定词义的作用、逻辑对确定译语 句子表达的作用和逻辑对从篇章结构角度检验译文的正误的作用。