“微机原理及接口技术”课程多媒体课件的设计

在教学领域,多媒体技术越来越显示出其优越性。应用和推广多媒体技术,改进了教师的教学方法和教学手段,对于提高教学质量具有重要作用。本文基于现代教学的需要,利用DreamweaverMX、Photoshop、Flash等多媒体和网页设计软件制作了“微机原理及接口技术”教学课件,并对制作过程中遇到的问题及其解决方法进行了探讨。     

随机2-维纳维-斯托克斯-伯格斯方程的不变测度的存在性

在具有光滑边界的有界区域D(∈) R2上,讨论了不可压缩流体的随机2-维纳维-斯托克斯-伯格斯方程du=(△u+1/2▽u2+(u·▽)u)dt+dW(t),其中w关于时间是白噪声的,关于空间变量是尽可能一般的高斯型时-空随机向量场;利用Krylov-Bogoliubov判别定理证明了上述方程的不变测度的存在性.     

一种新的快速特征选择和数据分类方法

针对数据分类问题提出一种新型高效的特征选择和规则提取方法.首先通过减少初始区间数量改进Chi-Merge离散化方法,再采用改进的Chi-Merge离散化连续型特征变量;特征离散化后,统计样本数据在每个特征子集划分下的频数表,并根据频数表计算数据不一致率,再利用顺序前向最优搜索的方法,快速确定特征数量由小到大的每一个最优特征子集;根据特征子集对应的数据不一致率差异最小化原则,完成特征个数最小化的最优特征子集筛选;根据最优特征子集的数据频数表,可直接提取数据分类规则.实验表明,快速提取的规则可获得较好的分类效果.基于该特征选择方法,提出一种面向分布式同构数据的快速分类模型,不但具有良好的分类效果,还支持对样本数据内容的隐私保护.     

牦牛奶酪中产细菌素乳酸菌菌株的筛选

本研究用分离自西藏、新疆、云南地区牦牛奶酪的39 株乳酸菌作为供试菌株,制备细菌素粗提液,用琼脂井法分析粗提液对9 株致病菌（蜡样芽孢杆菌、金黄色葡萄球菌、埃希氏大肠杆菌O157∶H7、单增李斯特菌、费氏柠檬酸杆菌、鼠伤寒沙门氏菌、阴沟肠杆菌、产气荚膜梭菌、宋内志贺菌）和2 株非致病菌（无害李斯特菌、嗜热链球菌）指示菌株的抑菌作用。测定结果表明有30 株菌的细菌素粗提液对指示菌株有抑菌作用,筛选出Y13、X29和X30这3 株抑菌谱较宽的细菌素产生菌。     

短圆柱滚子轴承内圈滚道宽度的测量

短圆柱滚子轴承内圈滚道宽度的测量一般采用样板测量,本文着重介绍使用仪器测量短圆柱滚子轴承内圈滚道宽度的原理。通过一系列结构连接,先用标准件对表,最后由仪表显示出被测轴承内圈滚道宽度尺寸。     

Four-factor justice and daily job satisfaction: A multilevel investigation.

This study examined the differential effects of 4 types of organizational justice on daily job satisfaction at between- and within-individual levels. Specifically, the authors predicted that interpersonal justice and informational justice would exhibit meaningful daily variations and would have direct impacts on individuals’ job satisfaction on a daily basis. They further theorized that distributive justice and procedural justice at a between-person level would moderate the within-person relationships. The authors used hierarchical linear modeling to test their hypotheses with a sample of 231 full-time employees in Hong Kong over the course of 25 working days. The results showed that both daily interpersonal and informational justice were positively related to daily job satisfaction. As hypothesized, between-individual distributive justice moderated the relationship between daily interpersonal justice and daily job satisfaction, and between-individual procedural justice moderated the relationship between daily informational justice and daily job satisfaction. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Dielectric and piezoelectric properties of （Li, Ce） modified NaBi5Ti5O18 composite ceramics

Nominal (Li0.5Ce0.5)x(Na0.5Bi0.5)(1-x)Na0.5Bi4.5Ti5O18 composite ceramics were fabricated using conventional solid-state reaction method. The coexistence of bismuth layer-structured phase and perovskite phase was determined in these ceramics using XRD technique. At room temperature, the x=0.11 sample showed the largest piezoelectric constant, d33, of about 26.5 pC/N and the largest electromechanical coupling factor, kt, of about 30%. Even after annealing at 500 ℃, the value of d33 was still about 19 pC/N, in x=0.08-0.11 samples. Moreover, these composite ceramics showed low temperature coefficients of dielectric constant and high electrical resistivity in the temperature region of 450-550 ℃. These results indicated that (Li, Ce) modified NaBi5Ti5O18 composite ceramics were promising piezoelectric materials for high-temperature applications.     

掺混肥料养分检测符合性判定的影响因素

掺混肥料的养分检测结果常常重现性不佳,导致在检测工作中难以快速对结果进行准确有效的符合性判定。论述了掺混肥料养分检测过程中的各个影响因素,并建议优化目前方法中关于制样方式、沉淀转移、数据处理等步骤,以确保符合性判定的公正性。     

绝对值编码器在超行程测量中的应用

以KU咬BLER 5860绝对值编码器为例,介绍了绝对值编码器在行程测量中的应用,着重讲述了在超过编码器测量范围时的处理方法。     

油液污染度自动检测仪的内部流场模拟分析

介绍了介质恒压堵塞型油液污染度自动检测仪的内部机械结构组成和油液污染度检测的具体流程。利用FLU?ENT流体分析软件对油液污染度检测仪的取样缸接头和滤膜之间的管路系统、测试缸接口处的压力进行仿真,并对得到的结果进行分析。结果表明:该油路系统中的压力损失较小,在合理的范围内,对油液污染度检测影响较小,证明了设计的合理性。