Genetic Correlational Analyses of Ethanol Reward and Aversion Phenotypes in Short-Term Selected Mouse Lines Bred for Ethanol Drinking or Ethanol-Induced Conditioned Taste Aversion.

Short-term selective breeding created mouse lines divergent for ethanol drinking (high drinking short-term selected line [STDRHI], low drinking [STDRLO]) or ethanol-induced conditioned taste aversion (CTA; high [HTA], low [LTA]). Compared with STDRLO, STDRHI mice consumed more saccharin and less quinine, exhibited greater ethanol-induced conditioned place preference (CPP), and showed reduced ethanol stimulation and sensitization under some conditions; a line difference in ethanol-induced CTA was not consistently found. Compared with LTA, HTA mice consumed less ethanol but were similar in saccharin consumption, sensitivity to ethanol-induced CPP, and ethanol-induced locomotor stimulation and sensitization. These data suggest that ethanol drinking is genetically associated with several reward-and aversion-related traits. The interpretation of ethanol-induced CTA as more genetically distinct must be tempered by the inability to test the CTA lines beyond Selection Generation 2. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The Effects of Hippocampal Lesions on Response, Direction, and Place Learning in Rats.

Rats with hippocampal or sham lesions were trained to find food on a T maze located at 2 positions. Response rats were required to make a right or left turn. Direction rats were required to go in a consistent direction (east or west). Place rats were required to go to a consistent location, relative to room cues. One place group had distinguishable start points at the 2 maze positions, whereas another place group had start points facing the same side of the room. Controls took longer to solve a place problem than the response and direction problems when the start points were not distinguishable. Rats with hippocampal lesions were not different than controls on the response problem but were impaired on the direction and place problems. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

变系数三阶线性微分方程的一个新的可解类型

通过自变量变换，将一类变系数三阶线性微分方程化为三阶常系数线性微分方程，从而得到变系数三阶线性微分方程的一个新的可解类型，推广了著名的三阶Eulcr方程。     

一种新型数据仓库体系的实现

针对当前流行数据仓库体系DB-DW存在的不足，引入ODS，构建起DB-ODS-DW数据仓库三层体系结构；并在分析当前通用数据仓库逻辑建模方法不足的基础上，提出将第三范式(Third Normal Form，3NF)和星型模式(Star-Schema)两种建模方法相结合来设计和实现DB-ODS-DW体系。     

基于Petri网的交互式双机容错模型

传统的服务器容错模型大多采用复制和冗余机制，给系统造成大量垃圾．本文分析了数据库的体系结构，给出一个具有三层交互式的Petri网容错模型．实现了客错机制和容错策略的分离，体现了系统的动态特性．     

基于知识管理的第三代OA的应用研究

提出将OA系统转移到知识管理平台的重要性和必要性。通过阐述知识管理平台的优点及第三代OA的系统架构，详细说明了如何设计以知识管理为核心的第三代OA系统，以及如何从目前应用较为广泛的第二代OA系统平滑地过渡到第三代OA系统。     

抛物型直纹三次曲面的设计方法

讨论已恬抛物线及平行于该抛物线所在平面的两条异面直线为异线成的直纹三次曲面，并给出了直母线的布线方法。     

煤粒瓦斯扩散及扩散系数测定方法的研究

基于理论分析建立了第三类边界条件下的煤粒瓦斯扩散方程，并给出了解析解。对解析解的分析表明，第一类边界条件下及煤粒内部浓度均匀一致条件下的扩散是第三类边界条件下的特例或近似过程。煤粒瓦斯扩散过程能否近似简化成第一类边界条件下和内部浓度均匀一致条件下的扩散过程，取决于煤粒内部扩散系数和表面扩散传质采数的相对大小，文中介绍了这两个系数的测试方法，并给出了测试实例。     

三次谐波检测无刷直流电机转子位置的研究

论述了一种用三次谐波检测转子位置的新方法。与传统的反电动势法检测转子位置相比较，三次谐波法实现简单，可检测速度范围更宽，不需要深度滤波。文中抛弃了将三次谐波直接输入DSPA／D口的传统做法，而是将反映三次谐波相位信息的方波输入DSP的I／O口，利用DSP强大的数据处理功能，提出了用软件实现数字锁相功能和对换相时刻的准确估计，去除了传统的硬件积分方法；提出用模拟相电压代替传统的端电压作为辅助检测信号；从而简化了硬件电路，提高了转子位置估计的精度和可靠性。实际试验表明，这种方法能够准确而快速的估计转子位置，动静态特性良好，整个系统结构紧凑，可靠性高。     

校园局域网中二、三层交换技术的应用

文章以长沙通信学院校园局域网为例，介绍校园网用户是如何通过网络交换设备实现相互通信的工作过程。