最小费用流问题的多重最优解

本文提出了可调圈的概念，并力图对最小费用流问题的多重最优解进行一些探讨。     

矿井网络风量调节计算与分析

本文分析探讨了矿井风量调节过程中，风路风阻变化对网络风流的影响，并据按需供风网孔内是否可设调节措施两种情况，分别提出及说明了调阻风路调阻值的简易计算方法。图２，参２。     

基于CAN总线技术的电力传动系统

本文依托一种智能分布式系统，就如何基于CAN总线技术来实现电力传动系统中各节点的模拟输入输出信号的通信进行了设计，在交、直流电机中进行了开环与闭环实验，成功地进行了稳速和调压调速。     

污染气体红外光谱鉴别器的优化设计

针对污染气体红外光谱特征分布的复杂性，结合几种线性分类器的特点，通过对每个环节的深入分析，设计出一种混合多叉树状光谱鉴别器。实验结果表明：此光谱鉴别器不仅结构简洁，设计合理，具有很高的分类能力和判别准确率，而且具有较好的灵活性和稳定性，完全满足快速识别的需要，是一种高效的光谱鉴别器。     

On <Emphasis Type="Italic">n</Emphasis> × <Emphasis Type="Italic">m</Emphasis>-valued Łukasiewicz-Moisil algebras

n×m-valued Łukasiewicz algebras with negation were introduced and investigated in [20, 22, 23]. These algebras constitute a non trivial generalization of n-valued Łukasiewicz-Moisil algebras and in what follows, we shall call them n×m-valued Łukasiewicz-Moisil algebras (or LM _n×m -algebras). In this paper, the study of this new class of algebras is continued. More precisely, a topological duality for these algebras is described and a characterization of LM _n×m -congruences in terms of special subsets of the associated space is shown. Besides, it is determined which of these subsets correspond to principal congruences. In addition, it is proved that the variety of LM _n×m -algebras is a discriminator variety and as a consequence, certain properties of the congruences are obtained. Finally, the number of congruences of a finite LM _n×m -algebra is computed.      

A New Self-assembly Metal CMG Discriminator by Multi-exposure LiGA Like Process and Sacrificial Layer Process

The counter-meshing gears （CMG） discriminator is a mechanically coded lock, which is used to prevent the occurrence of High Consequence Events. This paper advanced a new kind of self-assembly metal CMG discriminator based on multi-exposure LiGA like process and sacrificial layer process. The new CMG discriminator has the following characters except low cost： 1） it has only discrimination teeth sections; 2） the thickness of each gear layer exceeds one hundred micrometers; 3） it is axially driven by a separate dectronic magnetic micromotor directly; 4） its CMG is made of metal and is batch fabricated in the assembled state; 5） it is prevented from rotating in the opposite direction by pawl/ratchet wheel mechanism; 6） it has simpler structure. This device has better strength and reliability in abnormal environment compared to the existing surface micro machining （SMM） discriminator.     

自然数八度周期律暨丢番图四定理

在发现自然数八度周期律的基础上,明确而系统地制定了丢番图四定理,从而准确、彻底、全面地解决了数论中任意正整数究竟能够分解成几个平方数之和的这一古老问题。     

Photoreversibility and Biocompatibility of Polydimethylsiloxane‐Coumarin as Adjustable Intraocular Lens Material

Polydimethylsiloxane (PDMS) constitutes an interesting material for a variety of biomedical applications, especially as intraocular lenses (IOLs), for its excellent transparency. In this work, a photoreversible PDMS‐coumarin network, whose shape and properties can be adjusted postoperatively in a noninvasive manner, is developed. The synthesis of PDMS‐coumarin is achieved by amidation of a coumarin acid chloride derivative with amine‐functionalized PDMSs. Under exposure of λ > 300 nm, these polymers can be cured by dimerization of coumarin. The cured polymers can be uncrosslinked via photocleavage of cyclobutane dimers upon illumination at λ < 290 nm. The diffusion of linear PDMSs in a crosslinked network and the controlled shape modification are studied, which demonstrate that these polymers are good candidates for adjustable IOL application. IOL disks prepared from these materials show high hydrophobicity and good transparency. In vitro cytotoxicity, lens epithelial cell adhesion assays, and rabbit host reaction against implanted disks demonstrate the biocompatibility of the polymer.

     

程控双频调相信号发生器的研制及应用

本文论述了基于单片机的双频调相信号发生器的原理、硬件实现以及在物理实验中的应用,给出了实验测量两谐振动在同方向和在相互垂直方向的振动合成的图形数据。