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关键词： 随机抽取   小范围   均衡   唯一标识符  

摘要： 文中针对小范围候选数随机抽取应用中存在的候选数被抽取的不均衡问题,基于对小范围候选数抽取特点及随机抽取方法的研究和分析,在处理小范围候选数随机抽取均衡性问题中采取建立唯一标识符的方法,提出了一种基于唯一标识符的小范围均衡抽取的方法。通过设计并实现的均衡测试系统分别对直接随机抽取方法和基于唯一标识符的均衡随机抽取方法下得到的抽取结果数据的分析,得出基于唯一标识符的小范围随机抽取方法较直接随机抽取提高了小范围候选数随机抽取问题中抽取的均衡性。

关键词： 数字信息   参考文献   标注   杂志   医史   中华   object   管理系统  

摘要： 数字对象惟一标识符（digital object identifier，DOI）是对包括互联网信息在内的数字信息进行标识的一种工具。数字信息标注DOI如同出版物的条形码，是一个永久和惟一的标识号。DOI是一个可供全球期刊快速链接的管理系统，整个系统由国际DOI基金会（IDF）进行全球分布式管理。随着DOI的普及，可以借助其进行相关的科研评价，分析高被引频次作者、单他和论文等相关信息，了解各个领域学术研究的热点、影响和趋势，以及研究者在某一研究领域的影响力及最新研究成果。

关键词： 标识符   DOI   文献   Object   国际标准   规范化管理   数字对象   有效工具  

摘要： DOI，即数字对象唯一标识，为英文Digital Object Identification的缩写。根据国际标准ISO26324里的解释，它的意思是“一个对象的数字标识符”。这个标识符具有唯一性、永久性的特点。DOI是规范化管理、组织、共享、利用数字资源的有效工具。随着信息技术和互联网的发展，DOI目前已在国际出版界得到广泛推广应用。

关键词： 数字信息   标注   object   出版物   国际标准   条形码   互联网  

摘要： 数字对象唯一标识符（digital object identifier,DOI）是对包括互联网信息在内的数字信息进行标识的一种工具。在传统的出版物中,书刊、磁带、光盘都有国际标准编号（ISBN、ISSN、ISCN）及其条形码,作为出版物的唯一标识。这些标识使出版物得到有效的管理,便于读者查找和利用。而网上的文档一旦变更了网址便无从追索。数字信息标注DOI如同出版物的条形码,是一个永久和唯一的标识号。

关键词： Private authentication   information theoretic security   action dependent privacy   hidden source  

摘要： The problem of secret-key based authentication under a privacy constraint on the source sequence is considered. The identifier measurements during authentication are assumed to be controllable via a cost-constrained "action" sequence. Single-letter characterizations of the optimal trade-off among the secret-key rate, storage rate, privacy-leakage rate, and action cost are given for the four problems where noisy or noiseless measurements of the source are enrolled to generate or embed secret keys. The results are relevant for several user-authentication scenarios, including physical and biometric authentications with multiple measurements. Our results include, as special cases, new results for secret-key generation and embedding with action-dependent side information without any privacy constraint on the enrolled source sequence.

关键词： Electroactive polymers   ionic polymer-metal composites   identification   actuator   multiple models adaptive control  

摘要： Ionic polymer-metal composites are classified as a smart materials group, whose properties can be designed depending on the needs that arise. Ionic polymer-metal composites belong to the class of wet electroactive polymers. They are promising candidates actuator for various potential applications mainly due to their flexible, low voltage requirements, compact design, and lack of moving parts. However, being a widely used material in industry, ionic polymer-metal composite requires complex control methods due to its strongly nonlinear nature. An important prerequisite for an intelligent controller is the ability to adapt rapidly to any unknown operating environment. This article presents a novel approach to tuning multiple models of an online identifier by integral mapping. Through the extension of the estimation law of additional mapping between parameters and measurable signals, we significantly improve transient responses without increasing feedback gain. The authors measured the moisture content of ionic polymer-metal composite and consider in the experiment relationship between drying and varying of curvature output. The effectiveness of the proposed multiple models adaptive control strategy was verified in various experiments. The results of the study illustrated in the experiments show that adding new mapping improves not only the transients of controlled plant, but also increases the performance indexes of adaptive system.

关键词： ORCID   persistent identifiers   research infrastructure   open source   Crossref   digital object identifiers  

摘要： Research information is useful only if it can be shared-with other researchers, with research organizations (institutions, laboratories, funders and others), and with the wider community. In our digital age, that means sharing information between data systems. Persistent identifiers (PIDs) provide unique keys for people, places and things, which enables accurate mapping of information between these systems and supports the research process by facilitating search, discovery, recognition and collaboration. This article reviews the main PIDs used in research-digital object identifiers for publications, ORCID iDs for researchers, and a proposed new identifier for research organizations-as well as demonstrating how they are being used, and how, in combination, they can increase trust in research and the research infrastructure.

关键词： Automated vocal identification   autonomous audio recording   joint species distribution modelling   species classification   species identification   vocal communities  

摘要： Automated audio recording offers a powerful tool for acoustic monitoring schemes of bird, bat, frog and other vocal organisms, but the lack of automated species identification methods has made it difficult to fully utilise such data. We developed Animal Sound Identifier (ASI), a MATLAB software that performs probabilistic classification of species occurrences from field recordings. Unlike most previous approaches, ASI locates training data directly from the field recordings and thus avoids the need of pre-defined reference libraries. We apply ASI to a case study on Amazonian birds, in which we classify the vocalisations of 14 species in 194504 one-minute audio segments using in total two weeks of expert time to construct, parameterise, and validate the classification models. We compare the classification performance of ASI (with training templates extracted automatically from field data) to that of monitoR (with training templates extracted manually from the Xeno-Canto database), the results showing ASI to have substantially higher recall and precision rates.

关键词： ID   Locator separation   identifier resolution   mapping system  

摘要： Overloading of IP address semantics appeals for a new network architecture based on Identifier (ID)/Locator separation. The challenge of Identifier (ID)/Locator separation is how to solve the scalability and efficiency challenges of identity-to-location resolution. By analyzing the requirements of the Identifier (ID)/Locator separation protocol, this paper proposes a hierarchical mapping architecture on active-degree (HMAA). This HMAA was divided into three levels: active local level, neutral transfer level, and inert global level. Each mapping item is dynamically allocated to different levels to ensure minimizing delay according to its activity characteristics. The top layer CHORD is constructed by the Markov Decision Process, which can keep consistency between the physical topology and the logical topology. The simulation results on delay time show that HMAA can satisfy the scalability and efficiency requirements of an Identifier (ID)/Locator separation network.

标准号: DB12/T 819.3-2018