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动态上下文知识的获取与共享 被引量:4
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作者 於志勇 周兴社 +3 位作者 王海鹏 倪红波 於志文 王柱 《计算机科学》 CSCD 北大核心 2009年第9期218-223,共6页
上下文感知系统需要获取和共享多种上下文知识,不仅包含环境参数的具体取值,也包含对环境状态描述时所用的词汇,也就是概念。上下文知识具有与生俱来的动态性,在设计时难以预知系统可能涉及的上下文信息。而大多数已有的系统缺乏完善的... 上下文感知系统需要获取和共享多种上下文知识,不仅包含环境参数的具体取值,也包含对环境状态描述时所用的词汇,也就是概念。上下文知识具有与生俱来的动态性,在设计时难以预知系统可能涉及的上下文信息。而大多数已有的系统缺乏完善的动态上下文知识维护机制,因此不支持上下文感知应用的运行时的扩展。提出一个基于本体的层次化上下文模型,以及基于此模型的动态上下文知识获取与共享框架(DCASI)。框架中按需分散获取机制让各类上下文知识出自最有资格定义它的实体,使得上下文知识充足而又不冗余;双库集中共享机制按共享的不同作用维护两个知识库,有效支持了新上下文知识的定义和发现。原型系统验证了本框架的有效性。 展开更多
关键词 上下文感知 动态上下文知识 上下文模型 上下文框架
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一种面向普适计算的自适应软件平台的设计与实现 被引量:1
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作者 史殿习 丁博 +1 位作者 李骁 王怀民 《计算机工程与科学》 CSCD 北大核心 2010年第12期94-97,101,共5页
普适计算的适应性特征带来了有必要在软件平台层面解决的一系列共性问题,包括如何定义所支持的自适应软件体系结构、如何为上层应用的自适应提供必要的公共服务、如何使平台自身可以适应多维资源受限环境等。针对这些挑战,提出了对普适... 普适计算的适应性特征带来了有必要在软件平台层面解决的一系列共性问题,包括如何定义所支持的自适应软件体系结构、如何为上层应用的自适应提供必要的公共服务、如何使平台自身可以适应多维资源受限环境等。针对这些挑战,提出了对普适计算设备/资源进行适应性抽象的自主单元的概念,在此基础上给出了面向普适计算的自适应软件平台UbiStar的系统架构及其核心机制的设计与实现,并对UbiStar平台对适应性软件所提供的支持机制进行了概括,最后对相关工作进行了分析与比较。 展开更多
关键词 普适计算 适应性 自主单元 上下文框架
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融合丰富语言知识的汉语统计句法分析 被引量:2
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作者 熊德意 刘群 林守勋 《中文信息学报》 CSCD 北大核心 2005年第3期61-66,共6页
知识获取一直以来是自然语言处理中的瓶颈,基于树库的统计句法分析也不例外。树库中潜在隐含的语言知识是非常丰富的,但它们并不是可以直接得到,往往需要特定的策略才能将它们融合到模型中。我们的汉语统计句法分析模型从3个方面融合潜... 知识获取一直以来是自然语言处理中的瓶颈,基于树库的统计句法分析也不例外。树库中潜在隐含的语言知识是非常丰富的,但它们并不是可以直接得到,往往需要特定的策略才能将它们融合到模型中。我们的汉语统计句法分析模型从3个方面融合潜在的丰富语言知识:1)重新标注树库中的非递归名词短语和非递归动词短语;2 )设计新的中心词映射表;3)引进上下文配置框架以更具体地描述二元依存结构。由于融合了以上三种潜在语言知识,模型的F1值提高了2 37% ,完全匹配正确率提高了5 36 %。 展开更多
关键词 人工智能 自然语言处理 统计句法分析 非递归短语 中心词映射表 上下文配置框架
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Progression of Femmephobia in the LGBTQ+ Community
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作者 James Stair 《Journalism and Mass Communication》 2017年第8期465-471,共7页
All around, men are raised not to be a "sissy", "gay", or a "faggot". Gay men are, then sculpted by a masculinity framework that, from their early years, will not fully accept them. In an attempt to be accepted,... All around, men are raised not to be a "sissy", "gay", or a "faggot". Gay men are, then sculpted by a masculinity framework that, from their early years, will not fully accept them. In an attempt to be accepted, gay men often try to make up for their homosexuality through the performance of masculinity centered on suppression of the feminine. Femmephobia, in this context, is the suppression or rejection of feminine features. In the LGBTQ+ community, femmephobia is driven by the media and masculinity factors that are manifested in standards of attractiveness, but can also be broken down by media outlets that combat these ideas. Media has shaped gay men's perception of body image, standards of beauty, and have led to the progression of femmephobia within the community as a mode of restoring their masculinity that would not accept them. The introduction of alternative ideas of masculinity and gender perception are necessary for creating an inclusive form of masculinity that would promote a greater acceptance of all, and reduce femmephobia in society. Challenges against this masculinity are at work through various routes especially through the media. These venues are creating spaces where male femininity can be further explored and redefined. 展开更多
关键词 femmephobia FEMINISM LGBTQ+ MASCULINITY media MEN MSM
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A Pragmatic Analysis of Discourse Connectives in the Framework of Relevance Theory
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作者 ZHOU Da-jun REN Miao-miao MING Rui-long 《Sino-US English Teaching》 2018年第1期28-31,共4页
Discourse connectives can be dealt with in relevance-theoretic terms, as indicators of types of relevance. These connectives can be used to constrain the interpretation of an utterance. They are analyzed in a broad cl... Discourse connectives can be dealt with in relevance-theoretic terms, as indicators of types of relevance. These connectives can be used to constrain the interpretation of an utterance. They are analyzed in a broad classification outlined in discourse connectives which introduce contextual implications, which are concerned with strengthening and which introduce denials. A relevance based approach to discourse is a more adequate framework than a coherence based one for the analysis of discourse connectives. 展开更多
关键词 PRAGMATICS discourse connective relevance theory
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TransJ: An Abstract Independent-Framework for Weaving Crosscutting Concern into Distributed Transactions
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作者 Anas M. R. AlSobeh Stephen W. Clyde 《Computer Technology and Application》 2016年第4期173-195,共23页
Implementing crosscutting concerns for transactions is difficult, even using aspect-oriented programming languages such as AspectJ. Many of these challenges arise because the context of a transaction-related crosscutt... Implementing crosscutting concerns for transactions is difficult, even using aspect-oriented programming languages such as AspectJ. Many of these challenges arise because the context of a transaction-related crosscutting concern consists of loosely-coupled abstractions like dynamically-generated identifiers, timestamps, and tentative value sets of distributed resources. Current aspect-oriented programming languages do not provide joinpoints and pointcuts for weaving advice into high-level abstractions or contexts, like transaction contexts. To address these problems, we propose an extension to AspectJ framework, called TransJ, that allows developers to define pointcuts in terms of transaction abstractions and that automatically keeps track of context information for transactions. This paper describes TransJ as an abstract independent framework for weaving crosscutting concerns into high-level runtime abstractions, with which developers can implement transaction-related crosscutting concerns in modular, cohesive and loosely coupled transaction-aware aspects. Finally, this paper presents eight different ways in which TransJ can improve the reuse with preserving the performance of applications requiring transactions. Informally, these hypotheses are that TransJ yields (1) better encapsulation and separation of concern; (2) looser coupling and less scattering; (3) higher cohesion and less tangling; (4) reduces complexity; (5) improves obliviousness; (6) preserves efficiency; (7) improves extensibility; and (8) hastens the productivity. A brief discussion of experiment to test the hypotheses is provided, but the details of the experiment are left for another paper. 展开更多
关键词 AOP ASPECTJ TRANSACTION joinpoint model context crosscutting concern encapsulation high-level abstractions MODULARITY reuse.
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