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高程亚像素级视差信息的提取是空中立体视觉成像的关键,传统的亚像素高程信息提取采用变分法的立体匹配与光流估计方法,产生遮挡、辐射差异和几何畸变,高程立体成像的边界接缝处理不理想。提出一种基于变分原理的高程图像亚像素级匹配方法,采用连续过松弛拟合的边界接缝平滑处理方法进行修正,像素视差函数分为整数级视差函数和亚像素级视差函数,实现航空高程拍摄图像的亚像素级视差分析和三维图像重建。仿真结果表明,采用该方法实现亚像素配准和图像恢复,精度较高,稳定性和鲁棒性较好,在高空探测、空地目标识别等领域具有很好的应用意义。 相似文献
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本文介绍作者所进行的基于像素级图像融合技术的研究。目前,图像融合技术主要分为像素级、特征级和决策级这三种主要方法,而像素级图像融合的方法可以更多地保留原有图像的信息,并对单一像素信息进行处理,精度高、方法简单易行,目前被广泛的应用在各个领域。而基于平移不变小波变换算法先对待融合的多源图像进行空间域的变换,得到图像各层分解后的系数,再对该组系数按一定的融合规则进行融合处理得到一个融合后的系数表示,最后经图像的逆变换获得最终的融合图像。 相似文献
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基于系统观视角,创造性作为判断的对象及客体,是一个由区别技术特征等要素表征的系统。专利创造性判断过程是一个由系统输入、系统输出、转换过程构成的评价系统,其中内部转换过程遵循法律判断的一般规则,表现为法律推理,遵循三段论原理。客体的系统性决定了对其判断方法需要系统性、整体性,因此专利创造性判断方法应是整体评价。基于中国实践数据的实证研究显示,我国专利创造性判断客观化程度比较高,其中技术效果、普通试验能力、创造力等因素会直接影响最终判别结果,对整体性判断有显著影响。因子分析发现我国专利创造性判断主要影响因素可归属创新特质因子及技术起点因子等。 相似文献
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人工智能领域的专利申请是否符合专利保护客体的规定,进而能否获得专利权,是人们十分关心的问题.为了进一步明确相关的审查标准,国家知识产权局于2019年12月31日发布了关于修改《专利审查指南》的公告,对于包含算法或商业规则和方法等智力活动的规则和方法特征的专利申请,如何判断其是否符合专利保护客体、如何进行创造性的判断,进... 相似文献
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本文通过总结司法案例中所体现的思想和借鉴国外的判断规则,提出了在实际专利申请审查过程中处理当事人合理更正时应该遵循的判断思想和判断规则,并对现行专利法和审查指南提出了改进设想。 相似文献
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在不同化工厂检测环境中,空气中的环境变化情况较为复杂,带有颜色特征的污染气体浓度会被迅速稀释,造成转化的像素特征强度衰减。传统算法多是基于采集到的某种像素特征强度进行污染等级的判断,一旦气体被稀释,颜色特征发生退化,检测准确率会降低。提出了一种基于像素支持向量机增量学习算法。通过灰度差分的支持向量机增量学习。建立对不同像素等级信号进行对应增强学习,克服像素衰退的弊端。实验证明,这种算法能够避免由于化工厂内气体大量扩散,造成的像素衰减的缺陷,提高了化工污染程度检测的准确率。 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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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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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
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Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels 总被引：1，自引：0，他引：1
《中国科学院院刊(英文版)》2014,(3):267-268
<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese 相似文献
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WANG Sijia 《中国科学院院刊(英文版)》2014,(2):192-194
<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages. 相似文献