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基于OPNET的网络建模仿真分析 预览
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作者 韩立园 于林韬 +1 位作者 丛妍 孙铭镭 《长春理工大学学报:自然科学版》 2019年第1期119-122,127共5页
随着网络规模的不断扩大,如何扩建网络成为网络规划设计的难题。网络仿真技术成为网络规划设计可靠的定量依据,能够验证实际方案或比较多个不同的设计方案。先对OPNET仿真软件及网络模型结构进行介绍,并搭建出原网络模型和两种方式扩展... 随着网络规模的不断扩大,如何扩建网络成为网络规划设计的难题。网络仿真技术成为网络规划设计可靠的定量依据,能够验证实际方案或比较多个不同的设计方案。先对OPNET仿真软件及网络模型结构进行介绍,并搭建出原网络模型和两种方式扩展后的网络模型。对网络进行仿真,获得扩展前后的网络延时、排队延迟、吞吐量和利用率网络性能的参数曲线,并对仿真结果进行了分析,选出最佳扩展的设计方案。 展开更多
关键词 网络仿真 OPNET 网络模型 网络性能
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基于OpenBR的身份识别系统应用 预览
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作者 孙语瞳 于林韬 武博宇 《长春理工大学学报:自然科学版》 2017年第5期49-53,76共6页
OpenBR——开源生物识别系统,是一个可以提供快速高效开发环境的系统.正是因为它是一个用于研究新方法、改进现有算法、对接商业系统、测试识别性能并且可以自动部署生物系统的框架才使得应用此方法实现面部识别成为可能.对利用OpenBR... OpenBR——开源生物识别系统,是一个可以提供快速高效开发环境的系统.正是因为它是一个用于研究新方法、改进现有算法、对接商业系统、测试识别性能并且可以自动部署生物系统的框架才使得应用此方法实现面部识别成为可能.对利用OpenBR提供的生物识别算法设计工具,经过正脸检测、规范化、特征描述、特征提取、特征对比匹配等一系列步骤对图片数据进行处理,最后将得到的匹配分数经过决策算法成为通过人脸识别实现身份识别的依据进行了研究.通过实验结果得出设计的决策算法可以得到90%以上识别率.可以应用于考勤、驾驶员身份识别等领域. 展开更多
关键词 人脸识别 决策设计
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China-ASEAN e-commerce collaboration expands
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作者 Yu Lintao 《北京周报:英文版》 2016年第39期42-43,共2页
LSSVM模型下的LCVR相位延迟特性标定方法 预览 被引量:2
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作者 胡冬梅 刘泉 +1 位作者 于林韬 朱一峰 《红外与激光工程》 EI CSCD 北大核心 2016年第5期257-261,共5页
为了标定液晶相位可变延迟器(Liquid Crystal Variable Retarder,LCVR)的相位延迟特性,在25℃、405 nm波长下,利用搭建的测量装置采集了141组实验样本,其中71组样本为训练集,70组样本为预测集,利用最小二乘支持向量机(Least Squares ... 为了标定液晶相位可变延迟器(Liquid Crystal Variable Retarder,LCVR)的相位延迟特性,在25℃、405 nm波长下,利用搭建的测量装置采集了141组实验样本,其中71组样本为训练集,70组样本为预测集,利用最小二乘支持向量机(Least Squares Support Vector Machines,LSSVM)和支持向量机(Support Vector Machines,SVM)算法建立LCVR相位延迟量和驱动电压相关数学模型。实验表明,GASVR、PSOSVR、LSSVM方法下最大波长偏差△λ分别为0.013 6λ、0.013 7λ和0.004 5λ,均方误差提高两倍,通过比较,说明该模型能快速准确地预测LCVR工作范围内全部波长、全部电压值下的相位延迟。该方法可作为LCVR相位延迟特性标定的有效手段。 展开更多
关键词 液晶相位延迟器 最小二乘支持向量机 相位延迟 标定
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Study on phase retardation characteristic of LCVR using dispersion analysis and SVM
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作者 HU Dongmei LIU Quan +2 位作者 NIU Guocheng ZHU Yifeng YU Lintao 《仪器仪表学报:英文版》 2015年第2期11-17,共7页
To calibrate the phase retardance of a Liquid crystal variable retarder(LCVR),its birefringence dispersion characteristic was analyzed,and the Support vector machines(SVM) algorithm was adopted to establish the predic... To calibrate the phase retardance of a Liquid crystal variable retarder(LCVR),its birefringence dispersion characteristic was analyzed,and the Support vector machines(SVM) algorithm was adopted to establish the prediction model.The obtained SVM decision function was used as a part of LCVR phase retardance,which was generated by the driving voltage.The experimental verification was carried out with a 568 nm laser.The results show that the deviation of the experimental value and the theoretical value is about 0.0061λ.SVM method could be used as an effective method for LCVR phase retardance characteristic calibration. 展开更多
关键词 liquid crystal VARIABLE retarder(LCVR) BIREFRINGENCE DISPERSION support VECTOR machines(SVM) phase r
CATCHING A RIDE
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作者 Yu Lintao 《北京周报:英文版》 2015年第1期18-19,共2页
<正>China’s extensive railway technology experience can benefit the development of its Southeast Asian neighbors Asignificant China-Thailand railway cooperation deal recently signed during the Fifth Summit of t... <正>China’s extensive railway technology experience can benefit the development of its Southeast Asian neighbors Asignificant China-Thailand railway cooperation deal recently signed during the Fifth Summit of the Greater 展开更多
关键词 COOPERATION RAILWAY Thailand SOUTHEAST SIGNED Myanmar elsewhere apparently facilities bringing
rhe Unopposed ntervention
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作者 Yu Lintao 《北京周报:英文版》 2014年第34期22-23,共2页
关键词 对抗 伊拉克 ISIS 东部地区 人道主义 伊斯兰 叙利亚 地中海
SECURING A NEW CONCEPT:China presents a fresh vision of regional security at Asian cooperation summit
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作者 Yu Linta 《北京周报:英文版》 2014年第22期14-17,共4页
关键词 安全平台 亚洲 新鲜 合作 中国 国际组织 领导人 信任
高精度多路激光发射同步控制技术研究
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作者 刘泉 于林韬 杨帆 《半导体光电》 CAS CSCD 北大核心 2014年第6期1098-1100,1105共4页
针对战场复杂的激光威胁源,为检验激光告警机的多目标识别能力,研究了一种多路激光同步控制输出的模拟信号源,并提出了基于FPGA技术与光电闭环反馈校正技术相结合的同步控制方案。经过实验测试,同步控制精度小于0.1μs,证明了系统的可... 针对战场复杂的激光威胁源,为检验激光告警机的多目标识别能力,研究了一种多路激光同步控制输出的模拟信号源,并提出了基于FPGA技术与光电闭环反馈校正技术相结合的同步控制方案。经过实验测试,同步控制精度小于0.1μs,证明了系统的可行性。 展开更多
关键词 多路激光器 FPGA 光电探测 同步控制
Cementing Military Trust
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作者 Yu Lintao 《北京周报:英文版》 2013年第19期18-19,共2页
<正>Dempsey’s visit to China highlights need for cooperation General Martin Dempsey, Chairman of the Joint Chiefs of Staff, visited China in late April days after top U.S.
关键词 军事领域 信任 固井 中国 参谋长 华盛顿 领导人
基于MIMO构架的光OFDM系统研究
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作者 刘泉 于林韬 +1 位作者 孟颖 石磊 《半导体光电》 CAS CSCD 北大核心 2013年第1期119-121,共3页
文章在分析无线正交频分复用(OFDM)技术和单模光纤偏振特性的基础上,研究了一种基于多输入多输出(MIMO)框架的光OFDM系统并搭建了实验平台。系统将两路12Gb/sOFDM信号通过偏振复用为24Gb/s信号,实现了两路信号的解调输出。实验证明... 文章在分析无线正交频分复用(OFDM)技术和单模光纤偏振特性的基础上,研究了一种基于多输入多输出(MIMO)框架的光OFDM系统并搭建了实验平台。系统将两路12Gb/sOFDM信号通过偏振复用为24Gb/s信号,实现了两路信号的解调输出。实验证明,该系统可扩展光纤信道中的频谱划分,增大信道容量,具有较强的对抗光纤色散的能力。 展开更多
关键词 多输入多输出 光正交频分复用 偏振复用 光纤通信
The Disappearing Bookstore
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《北京周报:英文版》 2011年第48期42-43,共2页
Traditional bookstores face challenge "As online bookstores become more and more popular,traditional bookstores are disappearing,and a whole attitude and lifestyle is in danger of disappearing with them,"sa... Traditional bookstores face challenge "As online bookstores become more and more popular,traditional bookstores are disappearing,and a whole attitude and lifestyle is in danger of disappearing with them,"said Xue Yuan,author of the book Hello!The Independent Bookstores. 展开更多
Natural Pearl Shines Worldwide
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《北京周报:英文版》 2011年第28期44-45,共2页
West Lake inscribed on UNESCO’s World Heritage List as cultural landscape The famous ancient Chinese poet Bai Juyi of the Tang Dynasty(618-907) could not imagine a thousand years later the West Lake that fascinated ... West Lake inscribed on UNESCO’s World Heritage List as cultural landscape The famous ancient Chinese poet Bai Juyi of the Tang Dynasty(618-907) could not imagine a thousand years later the West Lake that fascinated him would 展开更多
Fixing Beijing’s Backbone
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《北京周报:英文版》 2011年第13期40-41,共2页
Capital’s central axis will be renovated as part of World Cultural Heritage status application Whenever the layout of Beijing is mentioned,its iconic central axis will immediately come to mind.It is so important tha... Capital’s central axis will be renovated as part of World Cultural Heritage status application Whenever the layout of Beijing is mentioned,its iconic central axis will immediately come to mind.It is so important that the Beijing Government 展开更多
Literary Pens Sparkle
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《北京周报:英文版》 2011年第36期40-41,共2页
The eighth Mao Dun Literature Prize rewards accomplished writers Five novels with realistic themes were crowned as the winners of the eighth Mao Dun Literature Prize on August 20."The conscience of realist autho... The eighth Mao Dun Literature Prize rewards accomplished writers Five novels with realistic themes were crowned as the winners of the eighth Mao Dun Literature Prize on August 20."The conscience of realist authors is palpable in these works," 展开更多
Examining a Treasure Trove
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《北京周报:英文版》 2011年第12期40-42,共3页
The Palace Museum inventories its collection For the first time in history, curators of the Palace Museum have finally inven- toried the museum’s vast collection. After seven years of painstaking work, the museum fi... The Palace Museum inventories its collection For the first time in history, curators of the Palace Museum have finally inven- toried the museum’s vast collection. After seven years of painstaking work, the museum finally released the results of its first comprehensive inventory on January 26, showing that the museum houses 1,807,558 items. 展开更多
Walking With the Honor Guards
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《北京周报:英文版》 2011年第32期40-41,共2页
PLA’s ceremonial detachments take part in Open Day "I am so honored to be a member of this team.My experience here will be a valuable asset during my whole life,"the tanned young soldier told the reporters... PLA’s ceremonial detachments take part in Open Day "I am so honored to be a member of this team.My experience here will be a valuable asset during my whole life,"the tanned young soldier told the reporters on the training ground in the bright sunshine. 展开更多
798 Transforms Modern Art Scene
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《北京周报:英文版》 2011年第45期42-43,共2页
Booming zone in Beijing is morphing from an Eden of creation into a high-end art market 1n 10 years, an abandoned factory complex has developed into one of Beijing’s cultural landmarks, the 798
A NEW HOME FOR ANCIENT TREASURES
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《北京周报:英文版》 2011年第15期40-45,共6页
The National Museum of China reopens to the public After four years of renovation work and an expansion to its floor space,the National Museum of China (NMC) reopened on March 1 this year.The museum has nearly triple... The National Museum of China reopens to the public After four years of renovation work and an expansion to its floor space,the National Museum of China (NMC) reopened on March 1 this year.The museum has nearly tripled in size from about 65,000 square 展开更多
Reading Patterns Changing
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《北京周报:英文版》 2011年第21期40-41,共2页
Modern life is changing the way people read April 23 was the 16th World Book and Copyright Day,also known as the World Book Day.Reading-related problems have once again attracted people’s attention.Today,living a li... Modern life is changing the way people read April 23 was the 16th World Book and Copyright Day,also known as the World Book Day.Reading-related problems have once again attracted people’s attention.Today,living a life with an increasingly rapid pace,most people are 展开更多
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