一类特殊的有限群

研究了元的阶除1和一个数m外均为质数的有限群,得出了它们的分类定理.     

基于Windows NT的HRPS-Ⅱ设备的控制系统设计

介绍了华中科技大学开发的HRPS-Ⅱ型选择性激光烧结设备的体系结构，根据选择性激光烧结的工作原理并结合该系统的硬件结构开发了基于NT操作系统下的控制软件．该控制软件是一种分层的结构，各个不同优先级的任务在不同的层面上运行，实时性强的部分运行在硬件中断级别上，对控制软件的关键性技术进行了描述．通过试验运行，该设备成功地加工出了复杂的原型件，证明控制系统开发是成功的．     

磁控式异步电动机软起动器的开发与应用

详细介绍了将传统磁放大器用于异步电机降压起动、实现软起动功能的原理以及实际实现线路，是异步电机减压软起动技术领域的一项创新。     

PDE-Based Medial Axis Extraction and Shape Manipulation of Arbitrary Meshes

Shape skeletonization （i.e., medial axis extraction） is powerful in many visual computing applications, such as pattern recognition, object segmentation, registration, and animation. In this paper, the authors expand the use of diffusion equations combined with distance field information to approximate medial axes of arbitrary 3D differential properties. It offers an alternative solids represented by polygonal meshes based on their but natural way for medial axis extraction for commonly used 3D polygonal models. By solving the PDE along time axis, this system can not only quickly extract diffusion-based medial axes of input meshes, but also allow users to visualize the extraction process at each time step. In addition, the proposed model provides users a set of manipulation toolkits to sculpt extracted medial axes, then use diffusion-based techniques to recover corresponding deformed shapes according to the original input datasets. This skeleton-based shape manipulation offers a fast and easy way for animation and deformation of complicated mesh objects.     

预应力梁板施工中病害分析与对策

针对预应力梁板施工中常遇到的一些病害,对其中产生的原因进行了分析与探讨,并提出了具体的预防措施和处理方法。     

Systemic Intervention in a University Department: Reflections on Arrested Action Research

This paper reflects on my experience as an insider researcher attempting to use critical systems ideas and practices to promote quality improvement in a university engineering department. Reflection is a key part of learning. This paper is intended to contribute to critically, self-reflective learning for the community of systems practitioners. These reflections on my questions about participation, ethics, politics of process, and the choices and actions resulting from them may help others to formulate their own. The complexity of systems practice places substantial demands on the researcher, particularly in the case of insider, practitioner research. Nevertheless, the exploration of critical systems approaches to critique boundaries and structure ‘problems’ in the core aspects of higher education in locally meaningful ways should continue. While demanding, it still can work to promote learning about authentic quality.     

"看不见的手"与科学的繁荣

“看不见的手”在科学中扮演着重要的角色,科学家个人的自利行为可以增进科学共同体的利益。要发挥“看不见的手”的神奇作用,制度的设计与安排不可或缺。唯有科学制度有效地发挥作用,科学家个人的自我目标与科学的制度目标融为一体,私人利益与公共利益和谐一致,科学才会获得真正的成功与繁荣。     

PEAK COVARIANCE STABILITY OF A RANDOM RICCATI EQUATION ARISING FROM KALMAN FILTERING WITH OBSERVATION LOSSES

We consider the stability of a random Riccati equation with a Markovian binary jump coefficient. More specifically, we are concerned with the boundedness of the solution of a random Riccati difference equation arising from Kalman filtering with measurement losses. A sufficient condition for the peak covariance stability is obtained which has a simpler form and is shown to be less conservative in some cases than a very recent result in existing literature. Furthermore, we show that a known sufficient condition is also necessary when the observability index equals one.     

现代工程图学教学方法及教学手段的研究与实践

根据现代工程图学课程特点及学生学习本门课程存在的问题,通过对传统教学和多媒体教学的利弊分析,提出了传统教学与多媒体教学有机结合是现代工程图学课堂教学有效的教学模式的观点,介绍了适应课堂教学的多媒体课件的制作方法.同时,提出了网络教学是远程学习、选修课学习和课外学习有效的教学模式的观点,介绍了网络教学的特点、教学方法及现代工程图学网络教学系统的内容.     

CONSTRUCTIVE KISSING NUMBERS IN HIGH-DIMENSIONAL SPACES

In the present paper, we focus on constructive spherical codes. By employing algebraic geometry codes, we give an explicit construction of spherical code sequences. By making use of the idea involved in the proof of the Gilbert-Varshamov bound in coding theory, we construct a spherical code sequence in exponential time which meets the best-known asymptotic bound by Shamsiev and Wyner.