线阵CCD驱动电路的研究

本论文设计了高速线阵CCD的驱动电路，并采用相关双取样的方法消除噪声。经过实验得到了预期的驱动脉冲信号，并给出了实验注意事项和制作的电路板图。     

“面向功能的复合法”的系统分析与设计方法

分析了原有的系统分析与设计方法的优缺点,提出了一种系统分析与设计的新方法-“面向功能的复合法”。     

Simulation of wind gust structure in the atmospheric boundary layer with Lattice Boltzmann Method

Cold fronts occur in northern East Asia during winter and spring.After cold frontal passage,airflow is downward and accompa-nying strong winds fluctuate significantly;this is termed wind gusts.Analysis of observation data shows that wind gust structure has coherent characteristics.This is important for entrainment of spring dust storms into the upper boundary layer,where they are transported great distances.The Lattice Boltzmann Method(LBM) is a computational fluid technique based on the Boltzmann transport equation.The LBM has been used to study complex motion such as turbulence,because it describes motion at the micro level.In this paper,Large eddy simulation is introduced in the LBM,enabling simulation of turbulent flow in the atmospheric boundary layer.The formation and development of wind gusts are simulated,and a coherent structure with a combination of wave and vortex is obtained.This explains the mechanism of soil erosion and sand entrainment by the coherent structure of wind gusts.     

基于Tamura纹理和广义判别分析的岩屑图像识别算法

自动、快速、客观地对岩屑进行分类是录井过程中一个非常重要的问题.以往在现场主要是靠人工经验的方式对各类岩屑的百分含量进行估测.但该方法受人为因素的影响较大.本文针对这个问题,提出基于Tamura纹理和广义判别分析的岩屑图像识别算法.算法采用Tamura纹理特征对不同岩性的岩屑图像进行纹理提取,然后将提取的Tamura纹理特征带入GDA(Generalized Discriminant Aanalysis)分类器进行岩屑的识别.通过对四川某地气田4口井的现场随钻的实验结果表明本文算法识别算法具有较高的识别率,为快速自动岩屑分类提供了一个有效的方法.     

Project knowledge and its resituation in the design of research projects: Seymour Benzer's behavioral genetics, 1965-1974

The article introduces a framework for analyzing the knowledge that researchers draw upon when designing a research project by distinguishing four types of “project knowledge”: goal knowledge, which concerns possible outcomes, and three forms of implementation knowledge that concern the realization of the project: 1) methodological knowledge that specifies possible experimental and non-experimental strategies to achieve the chosen goal; 2) representational knowledge that suggests ways to represent data, hypotheses, or outcomes; and 3) organizational knowledge that helps to build or navigate the material and social structures that enable a project. In the design of research projects such knowledge will be transferred from other successful projects and these processes will be analyzed in terms of modes of resituating knowledge. The account is developed by analyzing a case from the history of biology. In a reciprocal manner, it enables a better understanding of the historical episode in question: around 1970, several researchers who had made successful careers in the emerging field of molecular biology, working with bacterial model systems, attempted to create a molecular biology of the physiological processes in multicellular organisms. One of them was Seymour Benzer, who designed a research project addressing the physiological processes underlying behavior in Drosophila.     

大衍术——《数书九章》中的一次同余式理论

大衍术是宋代著名数学家秦九韶发明的一次同余式理论。本文分为两部分,第一部分阐明了大衍术与筮法、历法之间的关系,第二部分讨论秦九韶是怎样把非两两互素模数化为两两互素模数的,并概括出一套完整程序。     

关于TOR型和STOR迭代方法的收敛性

本文考虑当系数矩阵为正定对称矩阵，Ｈ阵及Ｌ阵情况下ＴＯＲ型方法的收敛性。此外，还提 出对称ＴＯＲ法－ＳＴＯＲ法并讨论其收敛性。     

基于区域准则的多目标决策方法

分析了代理值置换法（ＳＷＴ）使用中过于加重决策者和计算机负担的缺点，提出了基于所谓区域准则的多目标决策方法。给出了区域准则为常见的目标加权和准则下获取区域准则的两类方法，即改进的Ｚｉｏｎｔｓ－Ｗａｌｅｎｉｕｓ法和基于邻近准则分解和并合的方法。     

HEH[EHP]从硝酸盐介质中萃取钙的动力学研究

采用上升液滴法研完了HEH(EHP)——正辛烷溶液从硝酸盐介质中萃取Ca(Ⅱ)的正向反应速率与机理,考察了不同萃取条件对萃取速率的影响,提出了速率方程,并对萃取机理进行了讨论。