一种网络学习资源的检索模型研究

首先介绍了四种网络学习模式,并探讨了这四种模式中的最流行的网络学习模式-个别化的网络学习模式的资源特征.然后对个别化的网络学习模式,构建了一种基于语义的检索模型,并对模型中各组成部分的主要作用和模型的检索过程进行了阐述.最后通过实验的验证,证明了模型的合理性和有效性.     

Trust Management Mechanism for Internet of Things

Trust management has been proven to be a useful technology for providing security service and as a consequence has been used in many applications such as P2P, Grid, ad hoc network and so on. However, few researches about trust mechanism for Internet of Things （IoT） could be found in the literature, though we argue that considerable necessity is held for applying trust mechanism to IoT. In this paper, we establish a formal trust management control mechanism based on architecture modeling of IoT. We decompose the IoT into three layers, which are sensor layer, core layer and application layer, from aspects of network composition of loT. Each layer is controlled by trust management for special purpose： self-organized, affective routing and multi-service respectively. And the final decision-making is performed by service requester according to the collected trust information as well as requester＇ policy. Finally, we use a formal semantics-based and fuzzy set theory to realize all above trust mechanism, the result of which provides a general framework for the development of trust models of IoT.     

A Survey to View Update Problem

Extensible markup language(XML) has become the de facto standard for representing and interchanging data in web-based applications.And XML view,a virtual window for specified users,has been widely applied.In practical systems,users encounter the so-called view update problem when they need update source data through the view.For a long time,the view update problem is an open question in database community.With the development of various data models,the corresponding view update problem has been widely researched.In this paper,we introduce the conception of view update problem.We survey and compare previous approaches.Especially,we emphasize the role of semantics.Focusing on the problem in XML context,we give a discussion and propose a framework,which collects the semantic information at view definition time.Some related techniques for implementing this framework are further introduced.     

基于多层次语义特征的建筑立面点云提取方法

建筑立面信息是指建筑物与外部空间接触面的空间分布及属性信息,如何从点云数据中提取建筑立面信息是点云数据处理中的热点和难点.为解决传统格网密度算法在建筑立面点云提取时评价标准单一、适应性不强的问题,综合分析建筑区各类典型地物点云的高程分布、投影密度、法向量分布等局部及整体空间特征,构建由点云单点语义、格网语义及区域语义组...     

Colony: An Artificial Life Model for Active Autonomous Objects

Appropriate aids on top of the primitive object-oriented model will help promote better understanding of the semantics of applications and allow us to focus better on the various aspects of given problems. This study focuses on the exploration of a design model and the corresponding programming framework for the modelling and implementation of applications involving active autonomous objects based on the object technology. The proposed design model is an artificial life model based on the colony phenomenon in nature. This model can naturally be mapped onto an object-oriented implementation. The colony model favours a predicate-based object communication/coordination pattern as opposed to the navigational message-passing paradigm seen in programming languages such as C+ +. The proposed model is particularly appealing to us, for it presents a unifying conceptual design model and programming framework for a wide class of applications including neural networks, genetic algorithms and fuzzy expert systems. The ideas presented are illustrated through a genetic algorithm problem.     

复杂产品的层次语义模型研究

针对复杂产品的设计建模提出了一个层次语义模型。在现有三维CAD系统的基础上，从用户需求、产品设计、零件建模、部件装配各个阶段入手，将其中蕴含的行业知识加以分类、提取、抽象，形成设计语义、建模语义和装配语义，使虚拟样机在建立过程中能够利用并且包含更多的行业知识。对该语义模型的三个层次进行了详细讨论，并结合曲柄压力机的产品实例给出了具体实现。     

文化转译视域下鄂伦春族萨满神话的文化IP设计研究

目的 基于文化转译理念对萨满神话进行视觉元素重构,并形成创新型文化产业IP,进一步实现非物质文化遗产保护和地域性特色文化产业宣传。方法 以黑龙江省鄂伦春族萨满神话中的萨满面具为研究对象,通过文化转译下语义学和语形学的研究来深入挖掘萨满神话的精神内核及萨满面具的物质文化资源。提取核心文化并有效组织内在文化逻辑结构,依此形成创新型视觉元素表达库。并运用语义学中的视觉修辞方法进行符号转译,通过视觉元素重构形成新型文化IP。结论 将语言学中的文化转译理念引入设计学,能够更加精准地提取文化内核,并能有序的转译为视觉语言,从而促进龙江鄂伦春族萨满文化的视觉观感与文化保护,以及助力龙江萨满文化的创造性转化与创新型发展。     

基于关联与回溯的产品变异设计过程重用方法

为实现在复杂度和数量上急剧增长的产品过程模型和关联知识的重用,提出一种产品变异设计过程的重用方法.对设计系统的模块进行精细化和抽象化,建立具有规范化数据接口的产品结构变异设计的信息模型,用状态空间的带权有序检索树存储变异设计过程;将变异设计语义添加至可移植结构,当发生分割、合并和变换的变异设计行为时,对其抛弃、保持或复制等处理,实现变异设计语义随变异设计行为的继承与变迁;再通过检索变异设计语义不断获得待变异结构,将离散的设计过程关联;深度优先搜索获得把初始状态变换为目标状态的操作序列,执行可行解集,回溯变异设计过程并实现重用.以ACIS为几何造型内核开发自主原型系统,实现涡轮风扇发动机的压气机的转子叶片变异设计过程的重用.结果表明,该方法将设计重用对象由静态的孤立设计结果拓展到动态的连续设计过程,对于准确、快速地实现产品的结构变异设计具有重要意义.     

基于抽象机模式的Java虚拟机设计

Java虚拟机（JVM）作为Java程序与操作系统之间的桥梁，解决了Java程序在异构操作系统上运行的问题．但现有JVM功能模块之间的强耦合性，给JVM结构和指令集的扩展带来了困难．本文基于抽象机模式设计的JVM．通过将JVM的静态特性和动态特性定义为分离组件来分散关注点，以及抽象机模式与JVM固有特性的结合实现的JVM具有松散的耦合度．可扩展的结构和指令集．以及易分配的指令语义．     

Connectionism,Learning and Meaning

There is an apparent anomaly in the notion that connectionism, which is fundamentally a new technology, has considerable philosophical significance. Nonetheless, connectionism has been widely viewed as having implications for symbol grounding, notions of structured representation and compositionality, as well as the issue of nativism. In this paper, we consider each of these issues in detail and find that the current state of connectionism does not warrant the magnitude of many of the philosophical conclusions drawn from it. We argue that connectionist models are no more 'grounded' than their classical counterparts. In addition, since connectionist representations typically are ascribed content through semantic interpretation based on correlation, connectionism is prone to a number of well known philosophical problems facing any kind of correlational semantics. However, we suggest that philosophy may be ill advised to ignore the development of connectionism, particularly if connectionist systems prove to be able to learn to handle structured representations.