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| 1 | BigDog四足机器人关键技术分析显示文摘对Big Dog四足机器人的核心技术进行分析,适应复杂地形是Big Dog的设计主线。提高横、纵自由度联动能力是Big Dog结构设计主要突破点。机体重心颠簸起伏、机体重心自扰动等不良运动特性是四足机器人控制难度大的主要原因。液压动力系统的构成和优点将被剖析,解决腿类移动装置的驱动问题是液压系统研发的根本目的。支撑腿打滑及俯仰和横滚角度是否过大作为监测机体运动安全状态的参数。惯导和关节编码器可检测机身与肢体的状态,借助压力传感器可还原落足点地形,三者合一可构建虚拟模型。借助虚拟模型可求算机体重心等关键控制处理中间参数,运动控制系统可实施粗略的动作预演及精确的运动学和动力学规划。规划模型与样机模型的偏差作为反馈值实施闭环控制。建立以三维激光扫描仪和双目视觉为主的导航系统,视觉地形还原功能可帮助LS3安全跨越岩石地形,软件系统将各种基本功能整合为有机的整体。机器人的自主性与智能性被讨论,利用Big Dog/LS3与好奇号火星探测器作对比并加以分析。Big Dog目前存在的几个主要问题:液压系统无法瞬时大幅增压、机械传动各种损伤、仿生设计的不彻底性。LS3机器人针对Big Dog的不足,多个改进环节被分析。猎豹、野猫、Petman等机器人被简要分析。阿特拉斯双足机器人借助虚拟模型可实现机械臂碰撞保护功能,遭受外力撞击可迅速恢复平衡状态。 | 丁良宏 | 2015 | 机械工程学报2015，51，7： | 55 |
| 2 | 栓皮栎体胚诱导关键影响因素研究显示文摘Immature zygotic embryos of Quercus variabilis were as explants to induce somatic embryogenesis. Several factors influencing somatic embryogenesis have been assayed. Somatic embryos can be induced in MS and WPM basal medium, but there was more quantity, big size and high induction rate in MS medium. Induction rate was not significant cultured in light and dark condition. Zygotic embryos, collected in middle of July, gave higher rate of somatic embryogenesis than those collected on the earlier or later date. By adding 6-BA in medium individually, somatic embryogenesis appeared directly on the zygotic embryos without detectable callus. Secondary embryogenesis appeared in medium with 2,4-D individual or combined with 6-BA or TDZ. High induction frequency of 90% was achieved in MS medium supplemented with 0.5 mg·L -1 6-BA and 2,4-D, whereas the rate in hormone-free medium was only 16.7%. The genotypes of mother trees had an great impact on the inducing rate. Zygotic embryo surgery treatments were not favorable to embryogenesis. It was best to inoculate with entire zygotic embryos. The hypocotyl was a crucial part on somatic embryogenesis for Q. variabilis. | 张存旭 姚增玉 赵忠 | 2005 | 林业科学2005，41，2： | 20 |
| 3 | 非API标准Big Omega特殊螺纹接头连接性能数值分析显示文摘以德国非API标准的Big Omega特殊螺纹接头作为研究对象,应用有限元软件ANSYS建立计算力学模型,模拟套管柱接头行为,通过改变螺纹参数(高度、锥度等),计算得出各扣牙相应的最大法向接触应力与最大接头Mises应力。分析螺纹参数变化对扣牙所受应力的影响规律,从而得到Big Omega接头螺纹参数的改变对套管接头连接性能的影响规律,进而为套管柱接头特殊螺纹扣型的选择提供依据,为套管柱设计提供更为有效的参考。 | 许志倩 闫相祯 杨秀娟 | 2009 | 石油矿场机械2009，38，6： | 18 |
| 4 | 基于开源软件的网络监测系统显示文摘计算机网络的发展,要求网络管理具有相当的高效性。网络监测是网络管理的重要内容,本文首先介绍了基于SNMP的网络监测基础,然后从开源软件出发,介绍Big Brother、MRTG的应用,最后着重介绍了基于CACTI和RRDTOOL的网络监测,认为它是一个较为理想的网络监测系统方案。 | 余卫华 | 2007 | 微计算机信息2007，23，04X： | 15 |
| 5 | 孤立性心房颤动患者血浆高敏C反应蛋白与大内皮素-1浓度变化及相互的关系显示文摘目的:探讨不同类型的孤立性心房颤动(房颤)患者血浆高敏C反应蛋白(hs-CRP)与大内皮素-1(big ET-1)的水平差异以及二者之间的关系。方法:入选我院128例纽约心脏协会心功能分级Ⅰ~Ⅱ级、左心室射血分数〉50%的孤立性房颤患者,其中阵发性房颤患者(阵发性房颤组)83例,持续性房颤患者(持续性房颤组)45例,同时选择年龄、性别及病情与之相匹配的阵发性事上性心动过速患者82例作为对照组,测定血浆hs—CRP及higET-1浓度并进行统计学分析。结果:①两组房颤患者血浆hs—CRP及hig ET-1浓度均高于对照组,差异有统计学意义(P〈0.05)。②持续性房颤组血浆hs—CRP浓度高于阵发性房颤组,差异有统计学意义(P〈0.05);持续性房颤组血浆higET-1浓度较阵发性房颤组有升高趋势,但差异无统计学意义(P〉0.05)。③在阵发性房颤组,血浆hs—CRP浓度与hig ET~1浓度呈正相关(s=0.563,P〈0.05);在持续性房颤组,血浆hs—CRP浓度与hig ET-1浓度有相关性(P〈0.05),但相关性较弱,r值〈0.1。结论:孤立性房颤患者血浆hs—CRP及hig ET-1浓度增加,且持续性房颤患者升高明显;阵发性孤立性房颤患者的血浆hs-CRP浓度big ET-1浓度呈正相关。 | 郑黎晖 姚焰 吴灵敏 陈刚 张奎俊 张澍 | 2015 | 中国循环杂志2015，30，3： | 15 |
| 6 | 基于动态LDA的科研文献主题演化分析显示文摘准确把握科研领域内文献主题的演化情况,有助于更好的进行科学研究。针对文献语料具有的单一主题时间性强、多个主题间关联性大等特点,本文在标准LDA模型基础上,将语料按照时序关系进行分片,建立动态LDA模型,以此来研究各个主题的强度和内容随时间的变化情况。同时选择目前热门的'Big Data'技术作为实验对象,从Web of Science数据库中抽取引文信息建立训练数据集,利用变分贝叶斯推断法对模型进行了求解,并对结果进行了可视化展示,实验表明,该方法简单有效,可以为把握科研发展趋势提供有效决策支持。 | 曾利 李自力 谭跃进 | 2014 | 软件2014，35，5： | 14 |
| 7 | Parameter Optimization of Interval Type-2 Fuzzy Neural Networks Based on PSO and BBBC Methods显示文摘Interval type-2 fuzzy neural networks(IT2FNNs)can be seen as the hybridization of interval type-2 fuzzy systems(IT2FSs) and neural networks(NNs). Thus, they naturally inherit the merits of both IT2 FSs and NNs. Although IT2 FNNs have more advantages in processing uncertain, incomplete, or imprecise information compared to their type-1 counterparts, a large number of parameters need to be tuned in the IT2 FNNs,which increases the difficulties of their design. In this paper,big bang-big crunch(BBBC) optimization and particle swarm optimization(PSO) are applied in the parameter optimization for Takagi-Sugeno-Kang(TSK) type IT2 FNNs. The employment of the BBBC and PSO strategies can eliminate the need of backpropagation computation. The computing problem is converted to a simple feed-forward IT2 FNNs learning. The adoption of the BBBC or the PSO will not only simplify the design of the IT2 FNNs, but will also increase identification accuracy when compared with present methods. The proposed optimization based strategies are tested with three types of interval type-2 fuzzy membership functions(IT2FMFs) and deployed on three typical identification models. Simulation results certify the effectiveness of the proposed parameter optimization methods for the IT2 FNNs. | Jiajun Wang Tufan Kumbasar | 2019 | IEEE/CAA Journal of Automatica Sinica2019，6，1： | 14 |
| 8 | A view on big data and its relation to Informetrics显示文摘Purpose:Big data offer a huge challenge.Their very existence leads to the contradiction that the more data we have the less accessible they become,as the particular piece of information one is searching for may be buried among terabytes of other data.In this contribution we discuss the origin of big data and point to three challenges when big data arise:Data storage,data processing and generating insights.Design/methodology/approach:Computer-related challenges can be expressed by the CAP theorem which states that it is only possible to simultaneously provide any two of the three following properties in distributed applications:Consistency(C),availability(A)and partition tolerance(P).As an aside we mention Amdahl’s law and its application for scientific collaboration.We further discuss data mining in large databases and knowledge representation for handling the results of data mining exercises.We further offer a short informetric study of the field of big data,and point to the ethical dimension of the big data phenomenon.Findings:There still are serious problems to overcome before the field of big data can deliver on its promises.Implications and limitations:This contribution offers a personal view,focusing on the information science aspects,but much more can be said about software aspects.Originality/value:We express the hope that the information scientists,including librarians,will be able to play their full role within the knowledge discovery,data mining and big data communities,leading to exciting developments,the reduction of scientific bottlenecks and really innovative applications. | Ronald ROUSSEAU | 2012 | Chinese Journal of Library and Information Science2012，，3： | 13 |
| 9 | Big data drives the development of Earth science显示文摘Big data is now a popular topic,becoming increasingly well known around the world,and yet the concept of big data and its implications are still novel.To discuss big data,it is appropriate to first talk about what is really meant by this term,and so to begin the first article in the inaugural issue of Big Earth Data,let us look at how data has become big data and why that is important. | Huadong Guo | 2017 | Big Earth Data2017，1，1： | 11 |
| 10 | 基于电信运营商的大数据解决方案分析显示文摘移动互联网时代,云计算、物联网、智能终端等新技术新应用涌现,移动互联网的迅猛发展给电信运营商带来了流量收益的同时,也带来了新的机遇和技术挑战。本文主要分析了大数据技术体系及其行业实践,大数据解决方案及典型产品的优缺点,并提出了一种适合电信运营商的大数据平台架构。 | 冯明丽 陈志彬 | 2013 | 通信与信息技术2013，，5： | 11 |
| 11 | Foundation Study on Wireless Big Data: Concept, Mining, Learning and Practices显示文摘Facing the development of future 5 G, the emerging technologies such as Internet of things, big data, cloud computing, and artificial intelligence is enhancing an explosive growth in data traffic. Radical changes in communication theory and implement technologies, the wireless communications and wireless networks have entered a new era. Among them, wireless big data(WBD) has tremendous value, and artificial intelligence(AI) gives unthinkable possibilities. However, in the big data development and artificial intelligence application groups, the lack of a sound theoretical foundation and mathematical methods is regarded as a real challenge that needs to be solved. From the basic problem of wireless communication, the interrelationship of demand, environment and ability, this paper intends to investigate the concept and data model of WBD, the wireless data mining, the wireless knowledge and wireless knowledge learning(WKL), and typical practices examples, to facilitate and open up more opportunities of WBD research and developments. Such research is beneficial for creating new theoretical foundation and emerging technologies of future wireless communications. | Jinkang Zhu Chen Gong Sihai Zhang Ming Zhao Wuyang Zhou | 2018 | China Communications2018，15，12： | 9 |
| 12 | 面向Big Data的数据处理技术概述显示文摘无所不在的移动设备、RFID、无线传感器每分每秒都在产生数据,数以亿计用户的互联网服务时时刻刻在产生巨量的交互。Big Data作为一个专有名词成为热点,归功于近年来互联网、云计算、移动和物联网的迅猛发展。针对现阶段业务需求和竞争压力对Big Data处理的实时性、有效性的高要求,本文在介绍面向Big Data处理方面的主要问题和难点的基础上,将现有的各种方法概括为两类并分别进行了阐述和分析,最后指出了该领域可能的发展方向。 | 夏海元 | 2012 | 数字技术与应用2012，30，3： | 9 |
| 13 | 基于MATLAB的音乐旋律二维可视化方法显示文摘音频可视化是信息可视化的重要分支,音乐是最具大众性和普遍性的音频信息,乐谱描述音乐的特点是专业性强,形式抽象。为了有利于音乐的展示,提出将音乐进行二维图形映射的可视化处理方法。旋律是音乐的基本要素,主要包含音高、时值和响度等特征,将音乐的旋律进行数据化,绘制二维图形,可以增强人们对音乐的感觉和认知。音频数据受到采样频率和分割帧的影响,会产生大量的过程性数据。MATLAB提供音频处理函数和大规模数据的分布式并行处理功能,可以完成音乐旋律二维可视化的实时处理。利用傅里叶变换提取音乐旋律的基本特征,形成音高、时值和响度等音乐特征向量矩阵,编制程序完成旋律二维可视化图形的自动绘制。 | 张岩 吕梦儒 | 2018 | 沈阳师范大学学报(自然科学版)2018，36，4： | 9 |
| 14 | 大数据及其商业价值显示文摘随着互联网行业的快速发展,大数据(Big Data)被认为将会是IT产业中最热门、最具发展性的领域。本文主要分析了大数据的特点、蕴涵的商业价值和面临的问题,为电子商务、电信运营商等行业的数据应用发展提供了新的视角。 | 陈勇 | 2013 | 通信与信息技术2013，，1： | 8 |
| 15 | Efficient visualization techniques for high resolution remotely sensed data in a network environment显示文摘There are three major research hotspots in efficient visualization techniques of high resolution remotely sensed data in network environment: the data organiza-tion and access in disk storage,the image data stitching and fitting methods,and the network transfers and access. In this paper a new method of 'Big File' organi-zation for improving the storage access efficiency of high resolution remote data is presented; a 'virtual data source' concept is introduced to solve the stitching problem of remotely sensed data from different sources with different resolutions; a remotely sensed data access engine design based on ATL technique is discussed to process the network transfers and access of remotely sensed data. All these techniques have been adopted in a prototype of digital China named 'ChinaStar'. | WENG JingNong1,WU Lun2,HUANG Jian1,XIA YuBin3 & CAI Heng1 1 College of Software,Beihang University,Beijing 100083,China 2 Institute of Geographical Information System and Remote Sensing,Peking University,Beijing 100871,China 3 College of Computer,Beihang University,Beijing 100083,China | 2008 | Science China(Technological Sciences)2008，51，S1： | 8 |
| 16 | 原型建筑之进化——浅析BIG的设计理念与实践方式显示文摘本文试从'建筑进化论'与'原型进化'两个概念分析丹麦设计事务所BIG的思想哲学与设计方式。'建筑进化论'解释了BIG事务所在营造微城市模型、整合城市资源、回应城市需求过程中不断演化的具体思想。'原型进化'则介绍了BIG围绕模型与概念库而展开的设计模式。 | 陈曦 | 2011 | 世界建筑2011，，2： | 8 |
| 17 | Real-time intelligent big data processing:technology, platform, and applications显示文摘Human beings keep exploring the physical space using information means. Only recently, with the rapid development of information technologies and the increasing accumulation of data, human beings can learn more about the unknown world with data-driven methods. Given data timeliness, there is a growing awareness of the importance of real-time data. There are two categories of technologies accounting for data processing: batching big data and streaming processing, which have not been integrated well. Thus,we propose an innovative incremental processing technology named after Stream Cube to process both big data and stream data. Also, we implement a real-time intelligent data processing system, which is based on real-time acquisition, real-time processing, real-time analysis, and real-time decision-making. The real-time intelligent data processing technology system is equipped with a batching big data platform, data analysis tools, and machine learning models. Based on our applications and analysis, the real-time intelligent data processing system is a crucial solution to the problems of the national society and economy. | Tongya ZHENG Gang CHEN Xinyu WANG Chun CHEN Xingen WANG Sihui LUO | 2019 | Science China(Information Sciences)2019，62，8： | 8 |
| 18 | Research Progress of the Application of Big Data in China's Urban Planning显示文摘The arrival of the big data era facilitates the reform on related research and its application in the fi eld of urban planning from the mode of thinking to the technical method, which provides a technical foundation and platform for supporting the demands of residents as micro subjects in the process of city development. Beginning with analyzing the changes in urban planning thoughts under the infl uence of big data, this paper then summarizes the major reforms in urban planning research methodology and a city's plan formulation process caused by the application of big data, such as thinking mode, researching method, and planning process, based on which relevant issues like publicity and sharing of data, authenticity of data, and security of data that need to be further discussed and solved are analyzed, with the expectation of promoting the development of urban planning research and application in this new era. | Dang Anrong Xu Jian Tong Biao Li Juan Qian Fang | 2015 | China City Planning Review2015，24，1： | 7 |
| 19 | Efficient Bayesian networks for slope safety evaluation with large quantity monitoring information显示文摘New sensing and wireless technologies generate massive data. This paper proposes an efficient Bayesian network to evaluate the slope safety using large-quantity field monitoring information with underlying physical mechanisms. A Bayesian network for a slope involving correlated material properties and dozens of observational points is constructed. | Xueyou Li Limin Zhang Shuai Zhang | 2018 | Geoscience Frontiers2018，9，6： | 7 |
| 20 | The Application of Big data Mining in Risk Warning for Food Safety显示文摘Comprehensive evaluation and warning is very important and difficult in food safety. This paper mainly focuses on introducing the application of using big data mining in food safety warning field. At first,we introduce the concept of big data miming and three big data methods. At the same time,we discuss the application of the three big data miming methods in food safety areas. Then we compare these big data miming methods,and propose how to apply Back Propagation Neural Network in food safety risk warning. | Yajie WANG Bing YANG Yan LUO Jinlin HE Hong TAN | 2015 | Asian Agricultural Research2015，7，8： | 6 |
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