版画技法的拓展研究--PS版与其它版种结合的研究

PS版与其它版种在不同程度上的综合，给版画的表现技法开辟了新的天地，由于PS版是一种感光平版，使它与木版、纸版等版材结合后，可呈现即有平印又有凸印和凹印的特点，给版画的创作版材的利用与开发带来极大的空间。     

关于一个滚动问题的讨论

通过对圆筒在斜面上滚动问题的分析,得到要判断物体的滚动状态及摩擦力的性质,物体与支承面接触点速度的分析是关键的结论,并总结出求解的一般方法。     

粗糙度对微细通道内流动特性影响的实验研究

对几何特性相似而粗糙度不同的3种不锈钢矩形微槽内水、乙醇和正己烷的流动特性进行了实验研究.研究发现,在层流区随着雷诺数(Re)的增大,摩擦阻力常数fRe也缓慢增大,与传统理论的fRe是常数不同,且相对粗糙度越大,fRe值也越大.对于相对粗糙度较小(k/D_h<3%)的两种微槽转捩Re均在1 685～1 760之间,与传统理论相比,转捩并未提前.但相对粗糙度为3.15%的微槽的转捩Re数为1 500,与传统理论相比,转捩已提前.层流区摩擦阻力系数均高于传统理论预测值,相对粗糙度较小(k/D_h<3%)的两个微槽的摩擦阻力系数在Re<1 600的层流区域基本相同。但在Re=200～2 800的测量范围内,相对粗糙度大于3%的微槽的摩擦阻力系数均比相对粗糙度小于3%的微槽的要大.过渡区域的摩擦阻力系数均比传统预测值高30%～40%.工质极性对摩擦阻力的影响很小.     

论科学技术领域里的两次革命对书法艺术发展之影响

在中国书法艺术的发展进程中,科学技术领域里的两次重大革命对其产生了积极而深远的影响,一是印刷术的发明使用,再就是微型计算机的普及与运用。新的楷书艺术研究成果促进了印刷术的发明,印刷术的发明使用又极大地刺激了楷书艺术与草书艺术的向前发展、推动了书学理论研究的走向深入;微型计算机的普及运用,使书法艺术从实用的羁绊中彻底解脱出来,使书法学科完全独立于民族艺术之林,成为更纯粹的民族艺术形式之一。     

Optimal Circular Block Designs for Neighbouring Competition Effects

Competition or interference occurs when the responses to treatments in experimental units are affected by the treatments in neighbouring units. This may contribute to variability in experimental results and lead to substantial losses in efficiency. The study of a competing situation needs designs in which the competing units appear in a predetermined pattern. This paper deals with optimality aspects of circular block designs for studying the competition among treatments applied to neighbouring experimental units. The model considered is a four-way classified model consisting of direct effect of the treatment applied to a particular plot, the effect of those treatments applied to the immediate left and right neighbouring units and the block effect. Conditions have been obtained for the block design to be universally optimal for estimating direct and neighbour effects. Some classes of balanced and strongly balanced complete block designs have been identified to be universally optimal for the estimation of direct, left and right neighbour effects and a list of universally optimal designs for v<20 and r<100 has been prepared.     

Localizing Combinatorial Properties for Partitions on Block Graphs

We extend the study on partition properties from the set partition to the graph partition, especially for the class of connected block graphs which includes trees. We introduce seventeen partition properties and determine their inter-relations. The notions of k-consistency and k-sortability were studied in the set partition to localize the properties, i.e., a global property can be verified through checking local conditions. We carry on these studies for partitions on connected block graphs. In particular, we completely determine the consistency for all the seventeen properties.     

拥有汉字菜单的批文件的设计及应用

对于一个需要运行多种系统软件和应用软件的微机系统，配备一个拥有汉字菜单及分支调用功能的批文件，能给用户操作带来很大方便．本文介绍这种批文件的设计方法和应用示例．     

偏心夹紧机构非圆形轮廓曲线的设计及受力分析

本文从偏心轮轮廓曲线上每一点都满足自锁条件来推导轮廓曲线的方程式．曲线的形状分为两种，第一种为精确的曲线形状；第二种作为初步的近似为对数螺旋线形状，现根据这种曲线对偏心轮进行受力分析，进而计算夹紧力的大小．在讨论自锁条件及偏心轮受力分析时，都考虑了转轴处的摩擦力，并引进摩擦圆的概念．     

非奇块H矩阵的充分条件

引入了一类块对角占优矩阵的概念,在原有点H矩阵判定的基础上,应用分块技术,通过构造性证明对块对角占优矩阵进行了讨论,给出了非奇块H矩阵的一个简捷实用判据,推广了相应文献的结果,进一步补充和完善块对角占优矩阵的理论。     

Conditional simulation from highly structured Gaussian systems, with application to blocking-MCMC for the Bayesian analysis of very large linear models

This paper examines strategies for simulating exactly from large Gaussian linear models conditional on some Gaussian observations. Local computation strategies based on the conditional independence structure of the model are developed in order to reduce costs associated with storage and computation. Application of these algorithms to simulation from nested hierarchical linear models is considered, and the construction of efficient MCMC schemes for Bayesian inference in high-dimensional linear models is outlined.