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1.
《科技风》2021,(9)
多传感器信息融合技术,是指通过对多传感器系统所获取的大量信息进行分层次、多级别的融合处理,协调拥有多个信号源的复杂应用系统中传感器相互之间的工作,能够得出更加准确、更加完善的结论,也被称为多源数据融合技术。而多传感器信息融合估计,通过利用多个传感器对同一目标进行观测,基于特定的最优融合准则将测量所得数据进行滤波处理,可以得到更精确、更可靠的融合估计结果,其精度要比单一传感器或局部估计精度高,是多传感器信息融合技术的重要组成部分。本文通过一个仿真实例分析比较了集中式融合与分布式融合对导航参数状态估计的效果,说明了状态估计在多源信息融合系统中具有重要的理论与实际应用价值。 相似文献
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基于现有定位方法无法满足RoboCup足球机器人比赛中的定位要求,本文提出了一种基于多传感器信息融合的场景定位方法。以全向视觉与电子罗盘作为传感器,采用基于目标与数据驱动的方式作为其融合控制结构,产生式规则作为其数据融合的方法。实验证明,在现有大场地比赛范围内,该方法可以有效地实现机器人的自定位。 相似文献
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机器人的定位技术是进行机器人环境探索、协调运动研究的前提,从信息融合的思想出发,提出了一种融合多传感器信息的合作定位技术.首先,对两轮机器人的基本运动形式进行建模,并针对超声波传感器建立了机器人之间的相对观测方程.然后,分别对机器人的内、外部传感器进行滤波和第一级融合,得到自身位姿和相对观测信息.最后,利用扩展卡尔曼滤... 相似文献
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进入到新世纪以来,随着我国国民经济实力的不断增强,我国的社会主义市场经济体制也应逐步完善,各行各业都取得了空前的进步和发展,其中数据融合技术作为一类较为先进的技术已经逐渐应到了军事以及民用等众多的领域中,在水声信号处理行业中数据融合技术也已经成为了核心技术之一,但是由于水下的环境是极其复杂的,这就大大降低了单个传感器的可靠性,因此一个重要的趋势就是水下多个传感器的共同使用,这也就要求了在多传感器数据融合技术也必须是较为先进的。本文便对水声信号处理中的多传感器数据融合的机制和方法以及多传感器数据融合技术在水声信号处理领域中的应用情况两个方面的内容进行了详细的分析和探析,从而详细的分析了我国水声信号处理中的多传感器数据融合技术。 相似文献
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本文介绍了基于多传感器信息融合技术的单交叉口信号控制方法。首先利用多传感器系统对交通流量进行采集，然后用加权平均的数据融合算法将交通流量数据进行处理，得到更可靠的数据，最后将这些数据作为确定交通信号控制参数的依据，运用公式算出控制参数。进而实现了对单交叉口信号的控制。相对于传统的基于单一传感器信号控制而言，谈方法具有信息的完整性、统一性、多样性和容错性等优点。 相似文献
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列车定位是列车运行控制的关键技术,本文论述了高速列车定位技术的特点和目前常用的方法,并且分析典型单一列车定位方式的局限性。提出一种以我国自主研发的北斗卫星导航(BEIDOU NAVIGATION SATELLITE SYSTEM,BDS)系统为主的多传感器信息融合的方案,利用随机加权算法实现多信息定位。本文为列车定位技术提供参考。 相似文献
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本文提出了电子电路故障定位的多传感器模糊信息融合方法。通过测试电路中的被诊断元件的工作温度和工作电压两个物理量,得出模糊信息理论中两传感器对各待诊断元件的故障隶属度,再利用模糊信息融合,确定故障元件,并通过单传感器诊断结果与模糊信息融合诊断结果比较,说明多传感器融合的优越性。 相似文献
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传统火灾报警系统基于单一参数进行探测,误报和漏报的问题日益突出。为了预防和减少火灾的发生,利用信息融合技术将多传感器信号数据进行融合,让我们对环境或对象特征有全面而正确的认识。本文从火灾探测的基本原理分析入手,将多传感器信息融合技术的框架引入火灾探测的算法研究中,按照数据融合的三个层次,进行层次化的信息融合,并且采用了模块化的算法识别。 相似文献
11.
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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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 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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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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Leah A. Lievrouw 《The Information Society》1998,14(2):83-96
The main premise of this article is that in information societies generally, and in virtual social contexts particularly, a distinctive style of interaction to facilitate the communication of difference, heterotopic communication , has emerged. It rests on two cultural foundations: an ideological belief in the positive, socially integrating power of communication, and a prevailing ethic of instrumental rationality, subjective individualism, and strategically practiced self-interest. The former is demonstrated by the use of simulation and spectacle as sources of information; exhibitionism/voyeurism as a communicative style; and the awareness of surveillance. The latter is seen in the competitive use of knowledge as a commodity; a surface globalism masking deep parochialism; lateral as well as vertical information inequity; and the use of public versus private as strategies for engagement rather than as spaces. Those who engage in heterotopic communication resort to their 'own devices' both in the sense of personal agendas, strategies, interests, and interpretations, and in the form of the telecommunication tools that help realize them. These personal and technological devices allow individuals with the right educational and technical resources to avoid exposure to disagreement, difference, or other information that does not serve their direct purposes or reflect their particular views of the world; yet they also help convey the appearance of openness, availability, and cooperation. This style of interaction is used strategically in combination with information and communication technologies to gain social or economic advantages, but it may encourage social separatism and parochialism, inhibit the negotiation of disputes, and emphasize competing interests. 相似文献