基于小波多分辨率分析的多通道遥感图像数据融合方法及实现

对同一目标的多波谱遥感图像进行融合、是富集有用信息、提高图像空间分辨率和解释水平的有效手段，本文提出了基于小波多分辨率分析的多通道遥感图像数据融合的原理、方法及实现过程，实例分析其结果良好。     

Data dimensionality reduction with application to simplifying RBF network structure and improving classification performance

For high dimensional data, if no preprocessing is carried out before inputting patterns to classifiers, the computation required may be too heavy. For example, the number of hidden units of a radial basis function (RBF) neural network can be too large. This is not suitable for some practical applications due to speed and memory constraints. In many cases, some attributes are not relevant to concepts in the data at all. In this paper, we propose a novel separability-correlation measure (SCM) to rank the importance of attributes. According to the attribute ranking results, different attribute subsets are used as inputs to a classifier, such as an RBF neural network. Those attributes that increase the validation error are deemed irrelevant and are deleted. The complexity of the classifier can thus be reduced and its classification performance improved. Computer simulations show that our method for attribute importance ranking leads to smaller attribute subsets with higher accuracies compared with the existing SUD and Relief-F methods. We also propose a modified method for efficient construction of an RBF classifier. In this method we allow for large overlaps between clusters corresponding to the same class label. Our approach significantly reduces the structural complexity of the RBF network and improves the classification performance.     

Low cost pre-stored video transmission across networks

This paper proposes a simple, practical and low-cost dynamic segmentation and bandwidth allocation scheme, called middle point, to transmit pre-stored video from source to playback destination across networks. The proposed scheme is based on two concepts, playback tunnel and bandwidth tunnel, to determine the segmentation boundary and transmission bandwidth with the objective of reducing transmission cost while guaranteeing the playback buffer neither underflows nor overflows. The performance of the proposed scheme is evaluated by a set of real-life MPEG video traces and also compared with the well-known optimal smoothing scheme. The obtained results show that the proposed scheme can be easily implemented with low complexity and low transmission cost.     

参数激励系统的主共振分岔控制

设计了非线性参数控制器来改变参数激励系统的稳态响应,消除了系统主共振时的鞍结分岔和减小了系统稳态响应的幅值.从而消除了系统特有的跳跃和滞后现象.首先由多尺度法得到系统的近似频响方程,再由奇异性理论来分析分岔特性,从而实现非线性控制的目标.由数值模拟来确定了非线性参数控制器的有效性和可行性.     

MCAI课件开发中的关键技术

以应用Authorware开发《CAD的建模技术》MCAI课件为例，论述了MCAI课件的设计与制作过程的关键技术。     

论情势变更原则适用的有关问题

本通过对情势变更原则的概述，从基于公平与诚信对合同当事人之间的权利和义务进行调整，以消除因情势变更所造成的不公平后果，维护当事人的合法权益的实践出发，阐明了情势变更原则适用合同纠纷的条件和程序，以及该原则与不可抗力、商业风险、显失公平等法律规则的区别。     

一种基于密钥分发中心的移动IP认证方案

移动IP认证涉及到多个实体,共享密钥的安全分发是认证过程的关键。文章提出采用密钥分发中心为认证中心,实现移动IP各实体间的交互认证、会话密钥安全共享。对协议的安全性分析表明其符合移动IP的安全需求。     

嵌入式Internet应用研究

当前,嵌入式系统的研究开发得到了迅速的发展,多种多样的嵌入式应用系统已经开发出来,随着Internet技术的发展,嵌入式系统的Internet应用需求越来越多。嵌入式系统的Internet应用扩展了Internet的应用范围,从而形成了新的技术领域——嵌入式Internet,嵌入式Internet也将成为下一代Internet的标志。     

一种基于名字的可移动即插即用网络

计算机网络给用户带来了很大的方便，但是，在目前仍然存在着配置复杂，不能够有效满足用户移动计算的需求等问题，虽然IPv6为解决上述问题提供了一定的机制，但是仍然存在一些问题，本文在IPv6基础上结合DNS和移动计算技术，提出了一种基于名字的可移动即插即用网络技术，并就其中可能出现的三种安全性问题提出了相应的解决方案，它具有主机的即插即用，可移动性和更安全等特点，原理性实验表明这种技术是可行的。     

NAS和SAN的融合方案与研究

NAS系统和SANs是网络存储技术发展的两个主要方向．NAS和SAN的融合可以解决SAN和NAS之间存储共享问题，提高效率，是存储需求的趋势．本文对NAS和SAN的关系以及它们融合涉及的技术进行了论述，然后给出了它们融合的方案及特点．