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通过图像边缘融合提高图像的成像质量和识别能力。传统的图像边缘融合方法采用小波包加权滤波方法,当图像出现丰富结构信息或者干扰较强时,融合效果不好。提出一种基于灰度窗口相关系数匹配的图像边缘融合算法。实现图像的边缘融合的基础是进行图像归一化分割,设计边缘特征提取方法,得到的图像边缘进行Hough变换直线检测,提取出直线段,通过超像素网格的形成的方法绘制图像的边缘融合边界寻优路径,得到超像素网格,实现了基于灰度窗口相关系数匹配的图像边缘融合处理。仿真结果表明,该算法的对图像的边缘融合效果较好,度量了区域间的差异和区域内的相似性,提高图像的分割和边缘融合质量。 相似文献
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对缓冲区的溢出类漏洞的线性预测是提高漏洞挖掘效率的重要一环,传统方法采用粒子群扰动聚类方法进行溢出类漏洞的预测和挖掘,存在预测精度不准的问题。提出一中基于模因组融合信息度传递的缓冲区溢出漏洞线性预测方法,实现对安全漏洞的准确检测。采用四叉树算法对混合粒子群多维数据进行数据预处理,采用模因组融合信息度传递,结合高斯变异对其进行扰动以代替随机产生新粒子个体的操作,实现对海量多模态数据的优化聚类和线性预测。实验结果表明,算法能准确跟踪溢出类漏洞的演化轨迹,实现对溢出类漏洞的线性预测,预测精度提高24.3%,漏洞挖掘性能提高,保证了应用信息应用环境安全。 相似文献
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《科技通报》2015,(8)
通过对智能手机动作识别算法改进,提高智能手机的嵌入式集成水平和面向对象能力。传统的智能手机动作识别算法采用静态姿势状态空间模型提取算法,当状态空间出现敏感性变化时,识别效果不好。提出一种基于特征敏感性控制的智能手机动作识别算法。基于特征敏感性控制,按翻转的方向,分向前、向后、向侧手翻三种,三个方向上的姿态特征信息采集特征向量,计算智能手机动作状态的变换矩阵分布强度,通过特征敏感性控制,得到的特征方程对模糊状态动作进行完全跟踪补偿,提高手机动作识别能力。仿真结果表明,该算法能有效实现对智能手机动作的实时跟踪和识别,对手机状态特征的追随性能较好,识别误差收敛于0,性能优越,使得智能手机更具有面向对象性,提高了对手机的控制精度。 相似文献
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《科技通报》2015,(8)
对健美操等运动状态下的标志性动作分析时评价和刻画健美操运动训练和比赛水平的定量性标准。传统的运动动作标志性分析方法采用运动幅度检测方法,对健美操这类运动幅度呈现不规则差异的运动项目来说并不适用。基于图像处理的方法,提出一种基于形体边缘轮廓特征点提取的运动动作标志性分析算法,进行了形体边缘轮廓特征点数据采集系统设计。提取形体边缘轮廓特征点,将空间邻域信息融入到运动形体图像的标志性动作检测中,采用亮点模型衍射的方法实现视觉穿透,搜寻健美操运动员的技术特征,实现对健美操运动动作的标志性分析算法改进。仿真实验结果得出,采用该算法能有效准确地提取健美操的形体边缘轮廓特征点,运动动作标志性检测概率较高,性能稳健,具有优越性。研究成果在健美操形体评价等领域中具有较好的应用价值。 相似文献
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吾尔尼沙·阿不都热依 《科技通报》2014,(6)
从视频像素灰度序列中提取特定人员的状态特征,采用平面阵对特征信息进行融合处理是实现计算机视觉下特定人员定位的重要步骤。传统的人员视觉定位方法采用视频步进跟踪学习方法,在随机状态分布下的复杂环境人员进行准确定位效果不佳,提出一种基于平面圆阵定位算法的特定人员计算机视觉定位方法,提取监控视频的图像,进行视频图像的背景建模,得到高斯差分尺度空间中的背景像素灰度值,实现对特定人员的表情识别的动作判别,以此为数据基础设计平面圆阵人员定位系统,实现对暴恐等特定人员的准确锁定和跟踪识别。仿真实验表明,采用该算法准确实现1500 m远距离暴恐人员特征识别与定位,误差较小,分辨率和准确性较高。 相似文献
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【目的/意义】本文融合文本和图像的多模态信息进行情感识别,引入图片模态信息进行情感语义增强,旨在
解决单一文本模态信息无法准确判定情感极性的问题。【方法/过程】本文以网民在新浪微博发表的微博数据为实
验对象,提出了一种基于DR-Transformer模型的多模态情感识别算法,使用预训练的DenseNet和RoBERTa模型,
分别提取图片模态和文本模态的情感特征;通过引入Modal Embedding机制,达到标识不同模态特征来源的目的;
采用浅层Transformer Encoder对不同模态的情感特征进行融合,利用Self-Attention机制动态调整各模态信息特征
的权重。【结果/结论】在微博数据集上的实验表明：模型情感识别准确率为 79.84%;相较于基于单一文本、图片模
态的情感分类算法,本模型准确率分别提升了 4.74%、19.05%;相较于对不同模态特征向量进行直接拼接的特征融
合方法,本模型准确率提升了 1.12%。充分说明了本模型在情感识别的问题上具有科学性、合理性、有效性。【创
新/局限】利用 Modal Embedding 和 Self-Attention 机制能够有效的融合多模态信息。微博网络舆情数据集还需进
一步扩充。 相似文献
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【目的/意义】社交媒体在改变新闻传播以及人类获取信息方式的同时,也成为了虚假新闻传播的主要渠
道。因此,快速识别社交媒体中的虚假新闻,扼制虚假信息的传播,对净化网络空间、维护公共安全至关重要。【方
法/过程】为了有效识别社交媒体上发布的虚假新闻,本文基于对虚假新闻内容特征的深入剖析,分别设计了文本
词向量、文本情感、图像底层、图像语义特征的表示方法,用以提取社交网络中虚假新闻的图像特征信息和文本特
征信息,构建多模态特征融合的虚假新闻检测模型,并使用MediaEval2015数据集对模型性能进行效果验证。【结果/
结论】通过对比分析不同特征组合方式和不同分类方法的实验结果,发现融合文本特征和图像特征的多模态模型
可以有效提升虚假新闻检测效果。【创新/局限】研究从多模态的角度设计了虚假新闻检测模型,融合了文本与图像
的多种特征。然而采用向量拼接来实现特征融合,不仅无法实现各种特征的充分互补,而且容易造成维度灾难。 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
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《中国科学院院刊(英文版)》2014,(3)
<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence 相似文献