共查询到18条相似文献,搜索用时 140 毫秒
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文章介绍了信息隐藏技术的概念、分类,阐述了信息隐藏技术的基本原理和主要特性,并对信息隐藏技术的主要研究领域数字水印和隐写术进行了比较研究。 相似文献
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目前,大多数孤立点检测算法仅仅考虑了数据集本身,而没有考虑数据集所蕴涵的语义知识。本文我们通过分析隐藏在Web日志中的语义知识来进行孤立点检测,提出了一种基于语义的孤立点挖掘方法。该方法基于Web日志中记录的各个项满足的数值关系来分析其中隐含的语义信息,并根据这些语义信息的重要性给出一个综合衡量其相关性的指标。实验结果表明,该方法是可行的、有效的。 相似文献
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电子政务网络信息安全探析 总被引:3,自引:1,他引:2
在阐述电子政务的概念、意义及总体框架基础上,分析了电子政务在网络信息安全上面临的挑战。对电子政务网络信息安全采用的密码技术、信息隐藏技术、内网和外网隔离技术、防火墙安全技术、数据库安全技术等进行了深入探讨。 相似文献
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目前。我国的上市公司在年报中披露环境信息的现象并不多。环境信息披露少而且不规范。一般是围绕获得ISO14000认证、环境标志认证进行宣传。而具体的环境信息、资源利用效率等状况则难以为公众所知。随着绿色消费的兴起。上市公司有隐藏环境污染信息、虚报环保信息的倾向。因此。建立上市公司的环境信息披露制度。加强信息披露管理。具有重要的现实意义。 相似文献
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This paper studies consumers’ incentives to hide their purchase histories when the seller’s prices depend on previous behavior. Through distinct channels, hiding both hinders and facilitates trade. Indeed, the social optimum involves hiding to some extent, yet not fully. Two opposing effects determine whether a consumer hides too much or too little: the first-period social gains are only partially internalized, and there is a private (socially irrelevant) second-period gain due to price differences. If the discount factor is large, the second effect dominates and there is socially excessive hiding. This result is reversed if the discount factor is small. 相似文献
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本文针对计算机绘图中截面交线法这种图形处理方法,在分析计算及消隐理论的基础上提出改进措施,使之不仅具有运算速度快、占用内存少的特点,而且克服了计算机绘图中常见的消隐不彻底的问题,较好地反映了三维立体曲面的图形。并且从不同方位进行动态观察曲面形体的尝试成为可能。 相似文献
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Contrary to the conventional belief that entry barriers are very low or non-existent in the small open economy of Singapore, our study reveals that the practice of strategic entry deterrence is surprisingly important to the firms involved. Over half of the respondents indicated that attempts to deter entry were comparable in importance to other strategic marketing and production decisions. Strategies of advertising, filling all product niches, dominating distribution channels and hiding profits are often used to blockade entry. 相似文献
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科索沃和阿富汗:美国争夺石油利益的战略通道 总被引:3,自引:2,他引:1
舒先林 《石油化工技术经济》2005,21(2):15-21
在新旧世纪之交的短短3年内,美国以避免“人道主义危机”和“反恐”为由先后发动了科索沃战争和阿富汗战争。今天看来,尽管这两场战争有着不同的理由和不尽一致的战略意图,但都隐藏着一个共同的战略目标:依靠军事力量在世界“石油供应心脏地带”及其油气连接通道地带进行油气地缘政治(oil-gas geopolitics)扩张,维护和控制美国主导的中亚通往西欧的石油运输通道和通向印度洋的石油供应通道,阻隔通向中国和俄罗斯实施的石油连接战略要道,以实现美国新的“大中东”石油霸权战略。 相似文献
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《Telecommunications Policy》2023,47(5):102463
This paper explores two strategies that the Facebook Oversight Board has available to build its own legitimacy. It argues that the Board's members perform as apolitical decision-makers. With that goal, the Board has portrayed international human rights law as a set of exogenous and universal principles that human rights experts can translate and implement on social media. The paper suggests that, instead of hiding its power behind alleged translations of higher principles, the Board could try to build its legitimacy by promoting the wider involvement of civil society. The Board could wield its power to strengthen civil society's participation in Facebook's drafting of content moderation rules. The Board could then present itself as a legitimate body not because it applies international law but because it encourages the participation of more actors and defers to their judgment. Despite the many limitations of this proposal, it would include more actors in the governance of online speech instead of shielding experts from participatory politics. 相似文献
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缀做衫作为福建惠安女的一种特定服饰,它由清末时期的接袖衫传承和发展而来,形成衣身短小,上紧下松的款式风格和多分割、多拼接的结构特征。本文主要从结构领域入手,运用实物标本与文献资料相结合的研究方法,对江南大学民间服饰传习馆所藏的一款缀做衫进行结构复原工作,根据复原结构图,来研究缀做衫的结构机能性。研究表明,缀做衫的结构设计手法满足"服装机能性"的实用、好用和美三个层面,即前后中破缝与节省面料的"经济实用性",袖子和衣长的"劳作便利性"、紧胸和宽下摆的"卫生舒适性",表现视觉形式美感的分割和拼接,以及"压胸突腹"审美取向等诠释的民俗文化寓意。 相似文献