二维并行取阈液晶光阀的研制

研制了一种透射式二维并行取阈液晶光阀，它能克服光学神经网络、光学信息处理系统中串行取阈的速度瓶颈，充分发挥光学处理系统空间带宽积大的优点。其分辨率可达４５ｌ／ｍｍ以上，响应时间１０ｍｓ左右，等效串行取阈处理速度达４×１０７ｔｉｍｅ／ｓ。它具有一种新型控制电极，制作简单，以透射方式工作。该器件灵敏度高，能在弱光下工作，使用简单，可以直接插在光路中使用     

硅基底液晶光阀的理论和工艺研究

本文介绍了一种新型空间光调制器——硅基底液晶光阀。阐述了该器件的工作原理和各膜层的制备过程。最后提出了两种薄双面抛光片的方法,它们是实现该器件实用化的关键工艺。     

低温旋转阀脉冲管制冷机实验研究

本文讨论了一种可适用于气体液化的新型脉冲管制冷系统：在该系统中,回热器被间壁式换热器所取代。切换阀置于脉冲管冷端,和脉冲管作为一个整体,起气体膨胀机的作用。我们建立了相应的实验装置以测量整个系统的性能．利用空气作介质,系统进出口温降为６３．６Ｋ,绝热膨胀效率可达４２％。利用氦气作工质,脉冲管冷端最低温度达１６０Ｋ,每１Ｋ有０．７５Ｗ的制冷量。     

反射式液晶光阀用于激光束空间整形可行性研究

从理论和实验两方面对一种反射式液晶光阀（LCOS）的调制特性进行了研究。着重研究了在高功率激光系统中,反射式液晶光阀作为空间整形器件面临的一些应用问题,特别是它的各种调制特性、整形能力以及对于光束质量的影响。研究发现,与透射式液晶光阀相比,反射式液晶光阀有着明显的优势,效率达到42%,远远优于透射式液晶光阀10%的效率,从而能够实现系统的大幅度简化,是一种非常有潜力的空间光调制器件。     

Microfluidic sequential injection analysis system based on polydimethylsiloxane (PDMS) chip with integrated pneumatic-actuated valves

A sequential injection analysis (SIA) system based on polydimethylsiloxane (PDMS) chip with integrated pneumatic-actuated valves was developed. A novel SIA operation mode using multiphase laminar flow effect and pneumatic microvalve control was proposed. The sample and reagent solutions were synchronously loaded and injected in the chip-based sample injection module instead of multi-step sequential injection by a multiposition valve and a reciprocating pump as in conventional SIA system. The sample and reagent injection volumes were reduced to ca. 1.1 nL. The present system has the advantages of simple structure, fast and convenient operation, low sample and reagent consumption, and high degree of integration and automation. The system operation conditions were optimized using fluorescein as model sample. Its feasibility in biological analysis was preliminarily demonstrated in enzyme inhibition assay.     

对TTL与非门电压传输特性测试实验的研究

本文通过对ＴＴＬ与非门电压传输特性的研究，介绍通过三种不同的实验方法，可以取得不同的实验效果。     

相互作用量子点的自旋相关输运

介绍了与磁性电极耦合的量子点的近藤共振、单电子能级自旋劈裂、磁化和线性电导等物理性质．研究结果显示，当磁性电极磁矩取向相同的时候，线性电导在低温下呈现双峰结构．而近藤共振和单电子能级的自旋劈裂都可以通过电极的内部磁化强度来控制，可以用来产生自旋阀效应．     

Parallel Subtraction using LCLV and Lenslet Array in Optical Neural Networks

Basing on the method of wavelength and beam deviation encoding for implementing a bipolar optical neural networks, the subtraction between the positive and negative stimulation of a neuron can be converted to the addition by the normal and in verse states of a liquid crystal light value (LCLV). The summation can be performed by using a lenslet to focus the two light spots which represent the two stimulations. The pre liminary experimental results demonstrate the feasibility of the presental method.     

Theory of the angular magnetoresistance in CPP spin valves

The resistance of CPP spin valve is a continuous function of the angle θ between the magnetizations of both ferromagnets. We use the circuit theory for non-collinear magnetoelectronics to compute the angular magnetoresistance of CPP spin valves taking the spin accumulation in the ferromagnetic layers into account.     

Optimization of asymmetric permeation in heterogeneous composite membranes

Asymmetric permeation in two-phase composite membranes with heterogeneous structures represented by a one-dimensional distribution of composition is treated theoretically on the basis of an irreversible thermodynamic transport equation. It is assumed that the permeability of one of the component phases is a monotone function of the activity of permeant while that of the other phase is constant, and that the permeability of the composite membrane is given by the volume average of the resistance coefficient, which is the inverse of permeability. Under these assumptions, it is shown that the optimal membrane which maximizes the degree of asymmetric permeation reduces to a binary laminate membrane. The condition for constructing the optimal laminate membrane is obtained explicitly. Conversely a condition on a desirable membrane component which realizes an arbitrary degree of asymmetric permeation is presented. These results can be applied to the optimal design of a membrane valve which is a chemical analog of a diode. © 1993 John Wiley & Sons, Inc.