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基于正则匹配和词云统计的主变压器缺陷内容分析 被引量:1
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作者 刘丽 张云云 +1 位作者 黄道友 张征凯 《现代工业经济和信息化》 2019年第2期118-120,共3页
以安徽省变压器相关数据为基础,编写正则表达式匹配出部体、部件的发生部位以及缺陷性质的严重程度,利用词云分析和词频统计对缺陷部体、部件发生部位及缺陷性质等进行分析。
关键词 主变压器 缺陷内容 正则匹配 云统计
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采用点云分区统计的成捆棒材端面定位方法
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作者 张付祥 孙和盛 +1 位作者 黄永建 黄风山 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2024年第5期711-720,共10页
针对成捆棒材端面贴标过程中出现的端面中心位姿测量难度大、效率低等问题,提出一种基于点云分区统计的成捆棒材端面定位方法.首先对端面点云进行预处理操作;然后使用改进的聚类分割算法对端面点云进行分割,并以分区统计为依据提出完整... 针对成捆棒材端面贴标过程中出现的端面中心位姿测量难度大、效率低等问题,提出一种基于点云分区统计的成捆棒材端面定位方法.首先对端面点云进行预处理操作;然后使用改进的聚类分割算法对端面点云进行分割,并以分区统计为依据提出完整单根棒材端面中心定位方法和残缺单根棒材端面中心定位方法,实现端面中心定位;最后以端面法向量表征端面中心姿态重建端面中心位姿.采集200组不同姿态的单根棒材端面点云进行实验的结果表明,单根棒材端面定位时间不超过0.5 s,位置误差小于3 mm,姿态误差小于2°;所提方法是高效的,可准确地定位棒材端面中心. 展开更多
关键词 分割 成捆棒材 分区统计 端面中心定位
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一个统计低云方案及其在大气环流模式中应用初探 被引量:8
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作者 戴福山 宇如聪 +1 位作者 张学洪 俞永强 《气象学报》 CAS CSCD 北大核心 2004年第4期385-394,共10页
文中利用湍流耗散特征时间尺度和湍流垂直扩散系数对湍流二阶距进行参数化 ,将一个统计云方案与一阶湍流闭合方案进行耦合。基于数值试验 ,在不同的相对湿度、温度垂直梯度、以及湍流耗散特征时间尺度条件下 ,对该方案云量模拟能力的分... 文中利用湍流耗散特征时间尺度和湍流垂直扩散系数对湍流二阶距进行参数化 ,将一个统计云方案与一阶湍流闭合方案进行耦合。基于数值试验 ,在不同的相对湿度、温度垂直梯度、以及湍流耗散特征时间尺度条件下 ,对该方案云量模拟能力的分析 ,发现该统计云方案对其采用的参数及湍流耗散特征时间尺度敏感。基于该数值模拟分析 ,修改了该统计云方案 ,并结合其他边界层积云参数化方案 ,给出了一个基于统计的低云参数化方案。将其初步应用于NCARCCM 3后发现 :该方案可以显著增强CCM 3对副热带低云的模拟能力 ,可以合理地模拟出大洋东部大陆西岸冷海域低云量大值中心 ,显示出该方案对于改进大气环流模式低云参数化具有潜在的应用前景。 展开更多
关键词 大气环流模式 湍流 统计方案 参数化
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统计云服务平台的构建与统计服务能力提升策略 被引量:1
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作者 赵广凤 吴继英 黎小兰 《统计与决策》 CSSCI 北大核心 2017年第20期39-43,共5页
云计算为现代社会生产、经济活动带来了一种全新的思维方式,是促进现代化服务型统计建设的重要举措。文章在分析统计服务能力内涵的基础上,利用云计算的技术优势,构建统计云服务平台,探讨了如何提升统计信息服务、统计咨询服务和统计监... 云计算为现代社会生产、经济活动带来了一种全新的思维方式,是促进现代化服务型统计建设的重要举措。文章在分析统计服务能力内涵的基础上,利用云计算的技术优势,构建统计云服务平台,探讨了如何提升统计信息服务、统计咨询服务和统计监督服务能力。 展开更多
关键词 计算 统计服务能力 统计服务平台
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图书馆统计云服务的技术与应用 被引量:8
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作者 陈放 王晓平 《大学图书馆学报》 CSSCI 北大核心 2010年第3期116-120,115,共6页
通过分析"全国高校图书馆事实数据库"系统为全国图书馆提供的"统计云服务"的成功案例,结合我国图书馆统计工作的实际需求,从理念到实践、从技术到管理阐述了统计云服务的可行性和风险的规避问题;阐述了运用数理统... 通过分析"全国高校图书馆事实数据库"系统为全国图书馆提供的"统计云服务"的成功案例,结合我国图书馆统计工作的实际需求,从理念到实践、从技术到管理阐述了统计云服务的可行性和风险的规避问题;阐述了运用数理统计方法和现代技术,通过云服务方式解决图书馆事实统计的实际问题;阐述了"统计云服务"系统构架的设计、数据标准化、统计参数和条件选择、统计结果的获取和存储方式等技术解决方案;提出了如何解决"统计云服务"在应用与管理方面的问题。 展开更多
关键词 统计服务 事实数据库 系统构架 数据标准化 解决方案
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基于点云处理的小型工业零件高度精密测量 被引量:9
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作者 张潇丹 单彦虎 储成群 《电子测量技术》 北大核心 2022年第11期134-139,共6页
针对很多小型工业零件存在微米级测量的需求,提出了一种点云多次滤波与平面拟合相结合的测量方法。以上下平面平行的规则直三棱柱体工件作为测量对象,使用3D线激光传感器获取工件的点云模型并传输到计算机中进行处理,将点云数据首先通... 针对很多小型工业零件存在微米级测量的需求,提出了一种点云多次滤波与平面拟合相结合的测量方法。以上下平面平行的规则直三棱柱体工件作为测量对象,使用3D线激光传感器获取工件的点云模型并传输到计算机中进行处理,将点云数据首先通过统计滤波剔除噪声和离群值;其次利用体素滤波降采样精简点云数量;然后采用直通滤波分离出工件点云的上下表面;再分别对上下表面的点云通过随机抽样一致性(RANSAC)算法拟合出平面方程;最后计算上下平面之间的间距即为被测工件的高度信息。将该方法测得的高度与激光三角法原理测得的高度数据进行对比,结果表明,该方法测量精度提高了72.33%;同时对于不同的点云密度,利用所提出的方法进行测量,测得当降采样中体素立方体的边长为15 cm时(点云数量精简了98.3%时)测量的误差最小,最小能达到5.1μm。该方法大大提高了工件的测量精度,可以广泛应用于工业测量中。 展开更多
关键词 激光三角法 云统计滤波 体素滤波 直通滤波 平面拟合 工件测量
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地方统计的大数据战略 被引量:1
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作者 刘智龙 《统计与咨询》 2013年第4期13-15,共3页
基于大数据时代背景,本文探讨了地方统计数据的特点,地方统计部门实施大数据战略的目的和特点,从技术角度研究了地方统计部门为运行大数据而构建的云框架实例,从统计科研角度,就创新大数据处理技术和其他信息技术手段在采集和处理数据... 基于大数据时代背景,本文探讨了地方统计数据的特点,地方统计部门实施大数据战略的目的和特点,从技术角度研究了地方统计部门为运行大数据而构建的云框架实例,从统计科研角度,就创新大数据处理技术和其他信息技术手段在采集和处理数据中的优秀表现作了简要叙述,从统计大数据人才培养角度,论述了统计人才梯队建设的一些想法。最终,结合了地方统计发展的一些特点,提出地方统计的大数据战略部署和运作方法。 展开更多
关键词 地方统计 大数据战略 统计
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基于产业园区的统计服务体系研究
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作者 黄国宁 《科技视界》 2015年第35期289-289,301,共2页
统计服务体系是产业园区进行宏观决策的基础数据,是指导和调整产业园区运行的重要依据。园区升级必须依赖于统计工作的升级,园区能力建设需要统计服务建设的优化与升级,为切实推进产业园区的统计服务体系建设,本文提出了建设基于业务管... 统计服务体系是产业园区进行宏观决策的基础数据,是指导和调整产业园区运行的重要依据。园区升级必须依赖于统计工作的升级,园区能力建设需要统计服务建设的优化与升级,为切实推进产业园区的统计服务体系建设,本文提出了建设基于业务管理、能力建设和机制建设的三条主线的园区统计服务体系,并以信息化的统计服务云平台为产业园区提供统计服务升级,通过引进上述升级服务注入到柳州市阳和工业新区,证实了产业园区服务机构管理升级的实效性。 展开更多
关键词 产业园区 统计服务体系 PDCA管理 服务统计平台
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融合现代信息技术推动基层统计数智化研究
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作者 吴桐 《IT经理世界》 2024年第5期143-145,共3页
在数字技术高速发展的今天,传统基层统计工作正面临一场深刻的“数智化”变革。本文旨在探讨如何有效融合现代信息技术,以数字化改革为核心动力,加速推动统计现代化改革进程。文章详细分析了智慧统计的概念、关键技术如大数据分析、云... 在数字技术高速发展的今天,传统基层统计工作正面临一场深刻的“数智化”变革。本文旨在探讨如何有效融合现代信息技术,以数字化改革为核心动力,加速推动统计现代化改革进程。文章详细分析了智慧统计的概念、关键技术如大数据分析、云计算和人工智能等,并讨论了这些技术如何帮助提高统计数据处理效率、准确性和实时性。同时,文章还提出了一系列策略和措施,以实现基层统计工作的智慧化转型,为决策者提供高质量的数据支持,从而促进社会经济的健康和可持续发展。 展开更多
关键词 现代信息技术 基层统计 数智化 统计
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基于数据挖掘的互联网行业岗位类型分析 被引量:3
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作者 詹翠芬 周燕 《计算机产品与流通》 2018年第7期136-138,共3页
本文通过抓取web招聘广告,利用Python进行文本分词并构建关键词向量空间模型来完成数据预处理部分,通过K-means聚类完成岗位类型划分。在此基础上,对各岗位类型进行相关性分析,并利用Python词云进行技能关键词统计。
关键词 文本挖掘 聚类分析 云统计
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云计算关键技术在统计中的应用研究
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作者 孙庆波 王晓燕 +1 位作者 赵慧 李晓娜 《大陆桥视野》 2016年第4期209-209,210,共2页
在政府统计工作中,如何充分利用云计算的各种技术,以提高统计数据处理的效率,具有重要的实践指导意义。本文基于云计算的理论和技术以及政府统计数据的特点,分析云计算在政府统计工作中的研究现状以及具体应用,探索政府统计部门建... 在政府统计工作中,如何充分利用云计算的各种技术,以提高统计数据处理的效率,具有重要的实践指导意义。本文基于云计算的理论和技术以及政府统计数据的特点,分析云计算在政府统计工作中的研究现状以及具体应用,探索政府统计部门建设云计算中心的困难与问题,最后展望统计云的发展。 展开更多
关键词 虚拟化技术 计算 统计
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Modeling and analysis of cloud computing system survivability based on Bio-PEPA 被引量:1
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作者 Zhao Guosheng Ren Mengqi +1 位作者 Wang Jian Liao Yiwei 《Journal of Southeast University(English Edition)》 EI CAS 2018年第1期21-27,共7页
For the cloud computing system,combined wth the memory function and incomplete matching of the biological immune system,a formal modeling and analysis method of the cloud computing system survivability is proposed by ... For the cloud computing system,combined wth the memory function and incomplete matching of the biological immune system,a formal modeling and analysis method of the cloud computing system survivability is proposed by analyzing the survival situation of critical cloud services.First,on the basis of the SAIR(susceptible,active,infected,recovered)model,the SEIRS(susceptible,exposed,infected,recovered,susceptible)model and the vulnerability diffusion model of the distributed virtual system,the evolution state of the virus is divided into six types,and then the diffusion rules of the virus in the service domain of the cloud computing system and the propagation rules between service domains are analyzee.Finally,on the basis of Bio-PEPA(biological-performance evaluation process algebra),the formalized modeling of the survivability evolution of critical cloud services is made,and the SLIRAS(susceptible,latent,infected,recovered,antidotal,susceptible)model is obtained.Based on the stochastic simulation and the ODEs(ordinary differential equations)simulation of the Bio-PEPA model,the sensitivity parameters of the model are analyzed from three aspects,namely,the virus propagation speed of inter-domain,recovery ability and memory ability.The results showthat the proposed model has high approximate fitting degree to the actual cloud computing system,and it can well reflect the survivable change of the system. 展开更多
关键词 cloud computing system Bio-I>EPA(biologicalperformance evaluation process algebra) SURVIVABILITY stochastic simulation
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SATVPC:Secure-agent-based trustworthy virtual private cloud model in open computing environments 被引量:2
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作者 徐小龙 涂群 +2 位作者 BESSIS Nik 杨庚 王新珩 《Journal of Central South University》 SCIE EI CAS 2014年第8期3186-3196,共11页
Private clouds and public clouds are turning mutually into the open integrated cloud computing environment,which can aggregate and utilize WAN and LAN networks computing,storage,information and other hardware and soft... Private clouds and public clouds are turning mutually into the open integrated cloud computing environment,which can aggregate and utilize WAN and LAN networks computing,storage,information and other hardware and software resources sufficiently,but also bring a series of security,reliability and credibility problems.To solve these problems,a novel secure-agent-based trustworthy virtual private cloud model named SATVPC was proposed for the integrated and open cloud computing environment.Through the introduction of secure-agent technology,SATVPC provides an independent,safe and trustworthy computing virtual private platform for multi-tenant systems.In order to meet the needs of the credibility of SATVPC and mandate the trust relationship between each task execution agent and task executor node suitable for their security policies,a new dynamic composite credibility evaluation mechanism was presented,including the credit index computing algorithm and the credibility differentiation strategy.The experimental system shows that SATVPC and the credibility evaluation mechanism can ensure the security of open computing environments with feasibility.Experimental results and performance analysis also show that the credit indexes computing algorithm can evaluate the credibilities of task execution agents and task executor nodes quantitatively,correctly and operationally. 展开更多
关键词 cloud computing trustworthy computing VIRTUALIZATION agent
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THE STATISTICAL CHARACTERISTICS OF IMPACT OF THE WESTWARD-GOING TROPICAL CYCLONES ON RAINFALL IN YUNNAN PLATEAU
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作者 郭荣芬 肖子牛 +1 位作者 李英 石文静 《Journal of Tropical Meteorology》 SCIE 2012年第1期81-88,共8页
Using data available from the Retrieval System Based on Yearbooks of Tropical Cyclones over the Western North Pacific,NCEP/NCAR reanalysis daily data and observed precipitation data for 1959 to 2007 in Yunnan,a provin... Using data available from the Retrieval System Based on Yearbooks of Tropical Cyclones over the Western North Pacific,NCEP/NCAR reanalysis daily data and observed precipitation data for 1959 to 2007 in Yunnan,a province located in a low-latitude plateau,this work analyzes the climatic characteristics and the corresponding large-scale circulation patterns related to the western North Pacific westward moving TCs(WMTCs).Its impacts on the rainfall in the Yunnan Plateau are studied.Results show that WMTCs happen almost every year,mainly from July to September.It shows a downward trend in decadal variation.Nearly the entire Yunnan area is affected by them but the eastern part experiences the most severe influences.Most of the WMTCs migrate from the South China Sea,primarily make landfall in Hainan and Guangdong and enter the Northern Bay.The tracks of these typhoons can be classified into five categories,in which the most significant impact results from those making landfall in Guangdong.All categories of the tropical cyclones can induce province-wide heavy rainfall in Yunnan.Super typhoons bring about the heaviest and most extensive rainfall over the low-latitude plateau while the associated circulation pattern is marked with a dominant 500 hPa meridional circulation at middle latitudes,an active monsoon depression and Intertropical Convection Zone(ITCZ) at low latitudes and a westward-located South Asia High at 100 hPa,which is favorable for tropical cyclones to travel westward.WMTCs tend to go westward into the interior part of China if the subtropical high extends its westernmost ridge point to the northeast of Yunnan,or expands its periphery anti-cyclonic circulation to the Tibetan Plateau,or merges with the Qinghai-Tibetan high. 展开更多
关键词 westward moving TCs precipitation in Yunnan statistical characteristics circulation background
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THE INTERANNUAL AND DECADAL VARIABILITY OF PRECIPITATION FOR YUNNAN PROVINCE IN RAINY SEASON AND ITS RELATIONSHIP WITH TROPICAL UPPER LAYER TEAT CONTENT
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作者 郑春怡 黄菲 普贵明 《Journal of Tropical Meteorology》 SCIE 2003年第2期164-172,共9页
Based on the monthly precipitation data of 126 observation stations from 1961 to 2000 in Yunnan Province, the interannual and decadal variability of precipitation in rainy seasons are studied by using wavelet analysis... Based on the monthly precipitation data of 126 observation stations from 1961 to 2000 in Yunnan Province, the interannual and decadal variability of precipitation in rainy seasons are studied by using wavelet analysis. It is shown that there is a 2-6 year oscillation at the interannual time scales and a quasi-30 year oscillation at the decadal time scales. These periodic oscillations relate to the distribution of tropical heat content. When the precipitation is much more (less) than normal, the upper seawater is colder (warmer) in almost all the tropical Indian Ocean, and warmer (colder) in the western Pacific as well as colder (warmer) in the eastern Pacific. The key areas of the anomaly heat content distribution that have significant correlation to the Yunnan precipitation in rainy season are in the southern hemispheric Indian Ocean with a dipole pattern in the winter as well as in the deep basin of the South China Sea (SCS) before the Yunnan rainy season begins. Therefore, the anomalous distributions of the heat content in the southern Indian Ocean and the SCS In winter are good indicators for predicting drought or flood in Yunnan Province in the following rainy season. 展开更多
关键词 rainy season precipitation in Yunnan Province interannual and decadal variability tropical oceans heat content
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Integrated and Intelligent Manufacturing: Perspectives and Enablers 被引量:32
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作者 Yubao Chen 《Engineering》 SCIE EI 2017年第5期588-595,共8页
With ever-increasing market competition and advances in technology, more and more countries are prioritizing advanced manufacturing technology as their top priority for economic growth. Germany announced the Industry ... With ever-increasing market competition and advances in technology, more and more countries are prioritizing advanced manufacturing technology as their top priority for economic growth. Germany announced the Industry 4.0 strategy in 2013. The US government launched the Advanced Manufacturing Partnership (AMP) in 2011 and the National Network for Manufacturing Innovation (NNMI) in 2014. Most recently, the Manufacturing USA initiative was officially rolled out to further "leverage existing resources... to nurture manufacturing innovation and accelerate commercialization" by fostering close collaboration between industry, academia, and government partners. In 2015, the Chinese government officially published a 10- year plan and roadmap toward manufacturing: Made in China 2025. In all these national initiatives, the core technology development and implementation is in the area of advanced manufacturing systems. A new manufacturing paradigm is emerging, which can be characterized by two unique features: integrated manufacturing and intelligent manufacturing. This trend is in line with the progress of industrial revolutions, in which higher efficiency in production systems is being continuously pursued. To this end, 10 major technologies can be identified for the new manufacturing paradigm. This paper describes the rationales and needs for integrated and intelligent manufacturing (i2M) systems. Related technologies from different fields are also described. In particular, key technological enablers, such as the Intemet of Things and Services (IoTS), cyber-physical systems (CPSs), and cloud computing are discussed. Challenges are addressed with applica- tions that are based on commercially available platforms such as General Electric (GE)'s Predix and PTC's ThingWorx. 展开更多
关键词 Integrated manufacturing Intelligent manufacturing Cloud computing Cyber-physical system Internet of Things Industrial Internet Predictive analytics Manufacturing platform
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Estimation of SO_2 emission factors from copper smelting industry in Yunnan Province,China 被引量:3
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作者 张艳 唐晓龙 +1 位作者 易红宏 马洁云 《Journal of Central South University》 SCIE EI CAS 2013年第3期742-748,共7页
Copper smelting is a significant source of SO2 emission. It is important to quantify SO2 emissions from combustion sources for regulatory and control purposes in relation to air quality. The characteristics of SO2 emi... Copper smelting is a significant source of SO2 emission. It is important to quantify SO2 emissions from combustion sources for regulatory and control purposes in relation to air quality. The characteristics of SO2 emissions from copper smelting industry in Yurman Province, China, were examined. Analysis based on the present situation, material balance and measuring method were used to confirm SO2 emission factors of copper smelting industry. Results show that SO2 emission factors for Isa system, side blown-continuous converting system (SB-CC), blast furnace-continuous converting systems (B-CC) and blast furnace-converter blowing (B-C) are 11.69-18.64, 62.44--101.4, 19.43-37.88 and 45.48-81.03 kg/t(blister copper), respectively. The comprehensive emission factor based on all smelting plants is found to be in the range of 23-39.99 kg-SO2/t(blister copper) for Yunnan Province, China. The results are compared with those for discharge coefficients of industrial pollutants in the First National General Survey of Pollution Sources and the emission factor of the total amount of major pollutants. It is observed that there are some differences among emission factors. 展开更多
关键词 copper smelting industry SO2 emission factors material balance measuring method
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大数据时代网络舆情信息集成机制研究 被引量:9
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作者 刘继 李磊 《电子政务》 CSSCI 2015年第2期39-45,共7页
从大数据对网络舆情研究的影响出发,提出了大数据时代网络舆情信息集成机制的框架。在网络社区基础上构建网络舆情云统计平台,对基于Blink DB的网络舆情大数据挖掘集成进行了分析,深入讨论了对舆情碎片信息集成以获取舆情事件全貌、提... 从大数据对网络舆情研究的影响出发,提出了大数据时代网络舆情信息集成机制的框架。在网络社区基础上构建网络舆情云统计平台,对基于Blink DB的网络舆情大数据挖掘集成进行了分析,深入讨论了对舆情碎片信息集成以获取舆情事件全貌、提高舆情演化分析效率、基于舆情记忆提升网络舆情趋势预判,最后总结舆情信息集成机制的特点。 展开更多
关键词 网络舆情 大数据 信息集成 云统计 网络治理
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Comparison between fully resolved and time-averaged simulations of particle cloud dispersion produced by a violent expiratory event
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作者 Akim Lavrinenko Alexandre Fabregat Jordi Pallares 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2022年第8期29-40,共12页
In this work we compare the DNS results(Fabregat et al.2021,Fabregat et al.2021)for a mild cough already reported in the literarure with those obtained with a compressible URANS equations with a k-ϵturbulence model.In... In this work we compare the DNS results(Fabregat et al.2021,Fabregat et al.2021)for a mild cough already reported in the literarure with those obtained with a compressible URANS equations with a k-ϵturbulence model.In both cases,the dispersed phase has been modelled as spherical Lagrangian particles using the one-way coupling assumption.Overall,the URANS model is capable of reproducing the observed tendency of light particles under 64µm in diameter to rise due to the action of the drag exerted by the buoyant puff generated by the cough.Both DNS and URANS found that particles above 64µm will tend to describe parabolic trajectories under the action of gravitational forces.Grid independence analysis allows to qualify the impact of increasing mesh resolution on the particle cloud statistics as flow evolves.Results suggest that the k-ϵmodel overpredicts the horizontal displacement of the particles smaller than 64µm while the opposite occurs for the particles larger than 64µm. 展开更多
关键词 CFD Covid-19 DNS URANS Lagrangian particle tracking COUGH Aerosol dispersion
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