微电子机械系统

本文对国外微电子机械系统的研究现况作了评述，介绍了ＭＥＭＳ的主要技术和它的应用情况，对国外的一些主要研究机构的情况进行了分析，最后就我国ＭＥＭＳ的发展提出了一些建议。     

An approach to integrating shape and biomedical attributes in vascular models

Computational models have been used widely in tissue engineering research and have proven to be powerful tools for bio-mechanical analysis (i.e., blood flow, growth models, drug delivery, etc). This paper focuses on developing higher-fidelity models for vascular structures and blood vessels that integrate computational shape representations with biomedical properties and features. Previous work in computer-aided vascular modeling comes from two communities. For those in biomedical imaging, the goal of past research has been to develop image understanding techniques for the interpretation of x-ray, magnetic resonance imaging (MRI), or other radiological data. These representations are predominantly discrete shape models that are not tied to physiological properties. The other corpus of existing work comes from those interested in developing physiological models for vascular growth and behavior based on bio-medical attributes. These models usually either have a highly simplified shape representation, or lack one entirely. Further, neither of these representations are suitable for the kind of interactive modeling required by tissue engineering applications.This paper aims to bridge these two approaches and develop a set of mathematical tools and algorithms for feature-based representation and computer-aided modeling of vascular trees for use in computer-aided tissue engineering applications. The paper offers a multi-scale representation based on swept volumes and a feature-based representation that can attribute the geometric representation with information about blood flow, pressure, and other biomedical properties. The paper shows how the resulting representation can be used as part of an overall approach for designing and visualizing vascular scaffolds. As a real-world example, we show how this computational model can be used to develop a tissue scaffold for liver tissue engineering. Such scaffolds may prove useful in a number of biomedical applications, including the growth of replacement tissue grafts and in vitro study of the pharmacological affects of new drugs on tissue cultures.     

微波在免疫组织化学中的应用

本文综述微波技术在免疫组织化学中的应用两头及其进展，着重介绍了微波在组织固定、抗原恢复和免疫染色方面的应用，并对微波免疫组织化学的应用前景进行了展望 。     

^239Puα粒子的微剂量谱和径向剂量分布

用大容积（６０ｍｍ×８０ｍｍ）的圆柱型流气式组织等效正比计数器测定了２３９Ｐｕα粒子的微剂量谱和径向剂量分布。α粒子束在无窗的情况下直接穿入正比计数器，由离子穿过而发生能量沉积的机率Ｒｂ为１。测量结果证实：沿α粒子径迹由单次事件沉积的剂量平均比能ｚ１Ｄ（Ｇｙ）与距径迹核径向距离ｂ（μｍ）之间完全符合ｚ１Ｄ＝ａｂ－２的函数关系，同时给出了求出最大径向距离（ｐｅｎｕｍｂｒａ）的方法。     

针对肌肉功能障碍患者的数据库研究与开发

建立标准数据库是临床研究病情变化的重要手段,建立适用于肌肉功能障碍患者的标准数据库模板更具有重要临床意义。本研究针对临床上所采集的具有肌肉功能障碍患者的肌力、肌电数据,通过ODBC连接方式,引入了统一建模语言(UML),使用VC++开发工具,设计和完成了Access数据库,以对获取到的大量的肌力、肌电数据进行管理和使用。数据库有效存储并管理肌力、肌电数据,同时能减少数据占有空间和数据冗余,它更好地满足了医院康复科的需求。     

多孔碳酸钙陶瓷--人造珊瑚的研究

天然珊瑚有三维贯通的多孔网络结构，它的主要成分碳酸钙(CaC03)在人体环境可降解。模拟珊瑚的组成与结构，研制新型的组织工程支架材料有着良好的应用前景。本文探索了多孔碳酸钙陶瓷的制备方法，并通过盐析法制备了一种多孔的碳酸钙陶瓷，有望获得高的孔隙率和孔连通性。     

骨组织工程支架材料

寻找理想的支架材料是目前骨组织工程研究的热点。本文对用于骨组织工程支架材抖的天然生物衍生材料、聚合物类材料、陶瓷材料及其复合材料等的研究现状进行综述，分析了这些材料的优缺点，并对骨组织工程支架材料发展趋势进行了展望。     

An Adaptive and Optimized Switching Observer for Sensorless Control of an Electromagnetic Valve Actuator in Camless Internal Combustion Engines

In this paper, the design and operation of a special electromagnetic actuator as a variable engine valve actuator are presented. Further, this paper describes a feasible approximated velocity switching estimator based on measurements of current and input voltage to achieve sensorless control. The proposed concept allows a reduced‐order observer to be conceived and yields a specific control strategy with an acceptable performance. In general, this approach represents a viable strategy to build reduced‐order observers for estimating the velocity of systems through the measurement of input current and voltage. The robustness of the velocity tracking is explored using a minimum variance approach. The effect of the noise is minimized, and the position can be achieved through an adaptive and optimized structure by combining this particular velocity estimator and an observer based on the electromechanical system. Position control is achieved through an inversion of the model. This approach avoids a more complex structure for the observer and yields an acceptable performance as well as eliminating bulky position‐sensor systems. In addition, a control strategy is presented and discussed. Computer simulations of the sensorless control structure are presented in which the positive effects of the observer with optimized parameter setting are visible in the closed‐loop control.     

多孔碳酸钙陶瓷-人造珊瑚的研究

天然珊瑚有三维贯通的多孔网络结构，它的主要成分碳酸钙(CaCO3)在人体环境可降解。模拟珊瑚的组成与结构，研制新型的组织工程支架材料有着良好的应用前景。本文探索了多孔碳酸钙陶瓷的制备方法，并通过盐析法制备了一种多孔的碳酸钙陶瓷，有望获得高的孔隙率和孔连通性。