粘合的产生与破坏机性

随着胶接技术的发展,各国科学家相继提出了论述界面粘合作用的多种理论。其中以机械闩锁或镶嵌理论提出最早,但作为一种科学理论现已放弃。以后西方科学家提出了吸附理论,苏联科学家提出了扩散理论和静电理论。近二十年来,在理论研究和应用方面,对吸附理论的发展作了不少工作,提出了表面能理论和论述界面粘合破坏的弱界面层理论。本文除对机械理论、静电理论和扩散理论作简要的评述外,主要以吸附理论为基础,较深入地讨论产生界面粘合的条件、过程、     

信息技术时代企业动态能力理论发展分析

动态能力理论经过20余年的发展,硕果颇丰。而近十年来,我国战略管理领域对于动态能力理论的研究也逐渐白热化,学者们立足于中国国情,对动态能力理论提出更多的挑战。本文对动态能力理论发展进行梳理回顾,试图给出未来的研究重点,以期为后续的理论以及实证研究奠定坚实的理论基础。     

推进我国三网融合势在必行

介绍了当前对三网融合的不同理解与观点,阐述了网络(信息)产业发展涉及到的生命周期理论、网络经济理论、内生交易费用理论和制度变迁理论等经济学理论,介绍了政府规制理论和可进入市场理论,给出了三网融合的一个解释,并分析了融合前后行业间与产业链各环节间的关系变化,最后指出了三网融合的必要性和紧迫性.     

混合型多值CMOS电路的代数理论

该文在传输函数理论和电流型CMOS电路代数理论的基础上,提出了混合型多值CMOS电路的代数理论,并应用该理论设计了译码器和编码器。设计结果表明基于该代数理论的设计优于传统设计。     

粗糙集的理论及应用研究

粗糙集理论是一种新的软计算方法,能效处理和分析不完备息。文章讲述了粗糙集理论的基本知识和相关算法,分析了粗糙集理论的相关应用,分析了粗糙集理论方法研究中的问题,并对粗糙集理论的发展进行了展望。     

模糊控制理论在工业控制工程中的应用实践探索

模糊控制理论是以模糊数学理论为理论基础,以传感器技术和计算机技术和自动控制理论作为技术基础的一种新型的自动控制理论和方法.这是控制理论发展到高峰期的产物,属于智能控制的范畴,也是人工智能的一大进步.这样的理论如果应用于工业,可从不同方面促进工业的发展.为了更好的促进工业的发展,必须促进模糊控制理论在工业工程的合理应用,本文就针对模糊控制理论在工业控制中的应用实践进行探究.     

信息科学中本体构建方法的比较研究

本体理论作为科学界的基本理论在信息科学领域发展二十几年,文中首先描述了在信息科学中本体理论的基本概念,接着概括了本体理论最常用的六种构建方法及其特点,然后比较分析了本体理论的几种构建方法,最后给出了七点结论。     

随机集理论及其在信息融合中的应用

多源信息融合经过近20年的发展已经取得了丰富的理论成果和应用成果,但是其理论框架尚未建立。近几年由Mahler提出的有限集合统计学(FISST)理论随机集理论的特例,从概率论角度统一表述了信息融合技术的主要方面。该文对近十几年随机集信息融合技术的发展加以回顾,主要包括随机集理论的产生背景、基本的思想和理论框架,以及当前的应用领域。最后指出了随机集理论将来可能的发展方向。     

《线性系统》书评

线性系统理论是现代控制理论、网络理论、通信理论,以及一般系统理论的基础,属于基础工程学科。在各个科学技术领域中,采用线性系统的基本概念、方法和理论的实例很多。因此,许多高等院校都把“线性系统理论”列为公共基础课。《线性系统》一书的原作(“Linear System”)是美国供大学高年级学生和一年级研究生     

复杂电子信息系统仿真理论方法体系探讨

复杂电子信息系统仿真所涉及的相关知识尚处于不断创新发展之中,有关的理论方法尚未形成体系.为此,在多年研究基础上,提出了复杂电子信息系统仿真的理论方法框架,包括基础理论、学科理论、方法论、工程方法等,并对各种理论方法的综合应用进行了讨论.     

The theory and applications of the inners

The notion of the inners of a matrix is fully discussed. The inners applications to control theory, stability theory, communication theory, circuit theory, network theory, digital filters, bioengineering, sparse matrix theory, quantum physics, and some topics in mathematics are enumerated and analyzed. It is shown that the inners concept offers a theoretical as well as computational unification for these applications. In addition, the historical background and motivation is presented for the inners approach. The importance of the inners notion to education, computation, and research in system theory is surveyed and evaluated. Future research problems using this concept are enumerated. Finally, this survey is documented by many past and recent references.     

Simple formula for analysing the centre-fed hemisphericaldielectric resonator antenna

A new single-mode theory is given for the centre-fed hemispherical dielectric resonator antenna. From theory, a simple formula is derived for efficient computation of the impedance matrix, and hence the input impedance of the antenna. The theory is in excellent agreement with the rigorous theory and will be useful for design engineering     

关于现代电磁场理论的探讨

该文简述了经典场论中存在的困难,现代电磁场理论如何在现代数学方法与现代物理概念的基础上建立起自恰的理论体系,克服了经典场论的困难,求得了麦克斯韦方程组的自恰解。并在此基础上探讨把宏观与微观的电动力学衔接起来的可能性。     

Gamma rate theory for causal rate control in source coding and video coding

The rate distortion function in information theory provides performance bounds for lossy source coding. However, it is not clear how to causally encode a Gaussian sequence under rate constraints while achieving R–D optimality. This problem has significant implications in the design of rate control for video communication. To address this problem, we take distortion fluctuation into account and develop a new theory, called gamma rate theory, to quantify the trade-off between rate and distortion fluctuation. The gamma rate theory implies that, to evaluate the performance of causal rate controls in source coding, the traditional R–D metric needs to be replaced by a new GRD metric. The gamma rate theory identifies the trade-off between quality fluctuation and bandwidth, which is not known previously. To validate the gamma rate theory, we design a rate control algorithm for video coding; our experimental results demonstrate the utility of the gamma rate theory in video coding.     

Drifting plasma magneto-ionic theory for oblique incidence

The magneto-ionic theory for drifting plasma for the case of oblique incidence is developed by using matrix analysis. Theqvariable may be evaluated from a determinantal equation. The present theory reduces, in particular cases, to the Booker quartic and to the magneto-ionic theory for drifting plasma developed previously by the author.     

基于散射模型的霓虹现象研究

霓和虹是天空中常见的大气光学现象,采用几何光学理论能够较准确地解释其成因。然而,几何光学理论的物理模型相对简单,不能说明雨滴尺度等因素对霓、虹形成的影响。本文采用散射理论研究了不同尺度水汽粒子的散射相函数以及雨滴粒子集群的角向色散特性,从散射的角度解释了霓和虹的成因,最后对散射理论和几何光学理论做了对比。研究结果为大气光学现象的研究提供了新的思路。     

Economic Approaches for Cognitive Radio Networks: A Survey

Efficient resource allocation is one of the key concerns of implementing cognitive radio networks. Game theory has been extensively used to study the strategic interactions between primary and secondary users for effective resource allocation. The concept of spectrum trading has introduced a new direction for the coexistence of primary and secondary users through economic benefits to primary users. The use of price theory and market theory from economics has played a vital role to facilitate economic models for spectrum trading. So, it is important to understand the feasibility of using economic approaches as well as to realize the technical challenges associated with them for implementation of cognitive radio networks. With this motivation, we present an extensive summary of the related work that use economic approaches such as game theory and/or price theory/market theory to model the behavior of primary and secondary users for spectrum sharing and discuss the associated issues. We also propose some open directions for future research on economic aspects of spectrum sharing in cognitive radio networks.     

认知无线电频谱共享中的博弈论算法

首先介绍了认知无线电技术和博弈论思想,然后按照不同的分类准则,考虑无线网络资源分配的实际情况,描述了两种常用的博弈论类型：非合作型博弈模型和合作型博弈模型。重点研究了两种博弈模型在认知无线电频谱共享技术中的资源分配问题。     

红外诱饵弹中药剂性能分析

从理论上论述了红外诱饵弹中药剂的组成、性能和配比 ,通过理论计算结果分析药剂的组成。为确定红外诱饵干扰点源红外寻的制导导弹的药剂配方提供依据。