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结构简单的D波段矢量毫米波信号产生的方法

光学学报 2021年第4期41卷 51-57页

作者：刘翠微余建军复旦大学信息科学与工程学院电磁波信息科学教育部重点实验室上海200433 复旦大学上海先进通信与数据科学研究院上海200433

提出一种新的基于单个强度调制器的D波段矢量毫米波产生方法。研究基于强度调制器,通过预编码技术,产生了八倍频D波段矢量毫米波信号,信号经过一定距离的无线传输之后输入接收端,最后对信号进行解调和误码分析。该方法具有一定的中心载... 详细信息

提出一种新的基于单个强度调制器的D波段矢量毫米波产生方法。研究基于强度调制器,通过预编码技术,产生了八倍频D波段矢量毫米波信号,信号经过一定距离的无线传输之后输入接收端,最后对信号进行解调和误码分析。该方法具有一定的中心载波抑制功能,在无光学滤波器下成功传输了信号,降低了光载无线系统的链路成本。实验验证了152 GHz 4 GBaud正交相移编码(QPSK)信号的产生和传输,经过1 m的无线传输后,接收到的QPSK信号的误码率低于软判决前向纠错门限阈值(1.0×10^(-2))。

关键词：光通信 D波段光载无线八倍频预编码强度调制器

Field Transmission of 100G and Beyond:Multiple Baud Rates and Mixed Line Rates Using Nyquist-WDM Technology

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ZTE Communications 2012年第3期10卷 28-38页

作者： Zhensheng Jia jianjun yu Hung-Chang Chien Ze Dong Di Huo ZTE USA MorristownNJ 07960USA

In this paper, we describe successful joint experiments with Deutsche Telecom on long-haul transmission of 100G and beyond over standard single mode fiber （SSMF） and with in-line EDFA-only amplification. The transmission link consists of 8 nodes and 950 km installed SSMF in DT＇ s optical infrastructure. Laboratory SSMF was added for extended optical reach. The first field experiment involved transmission of 8 x 216.8 Gbit/s Nyquist-WDM signals over 1750 km with 21.6 dB average loss per span. Each channel, modulated by a 54.2 Gbaud PDM-CSRZ-QPSK signal, is on a 50 GHz grid, which produces a net spectral efficiency （SE） of 4 bit/s/Hz. We also describe mixed-data-rate transmission coexisting with 1T, 400G, and 100G channels. The 400G channel uses four independent subcarriers modulated by 28 Gbaud PDM-QPSK signals. This yields a net SE of 4 bit/s/Hz, and 13 optically generated subcarriers from a single optical source are used in the 1T channel with 25 Gbaud PDM-QPSK modulation. The 100G signal uses real-time coherent PDM-QPSK transponder with 15% overhead of soft-decision forward-error correction （SD-FEC）. The digital post filter and 1 -bit maximum-likelihood sequence estimation （MLSE） are introduced at the receiver DSP to suppress noise, linear crosstalk, and filtering effects. Our results show that future 400G and 1T channels that use Nyquist WDM can transmit over long-haul distances with higher SE and using the same QPSK format.

关键词： coherent detection field trial coherent optical OFDM Nyquist WDM MLSE

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相变传热微通道技术的研究进展

机械工程学报 2010年第24期46卷 101-106页

作者：王辉汤勇余建军清华大学精密仪器与机械学系北京100084 华南理工大学机械与汽车工程学院广州510640 华南理工大学工商管理学院广州510640

快速增加的系统发热已经成为当代先进微电子芯片系统研发和应用中的一项重大技术挑战。近年来,微通道相变传热试验和理论分析都证实了其具有高热流密度的传热特性,预示这一技术未来在电子通信、航空航天等产业领域的先进微系统散热/冷... 详细信息

快速增加的系统发热已经成为当代先进微电子芯片系统研发和应用中的一项重大技术挑战。近年来,微通道相变传热试验和理论分析都证实了其具有高热流密度的传热特性,预示这一技术未来在电子通信、航空航天等产业领域的先进微系统散热/冷却应用上的巨大前景。对相变传热微通道研究领域的三个主要方面(微通道内微热流体动力学过程及传热机理、微通道结构与传热特性的影响关系、微通道结构(器件)的制造技术等)的最新研究进展进行了回顾与综述,探讨相关的理论基础和研究方法,并对这一研究领域的发展趋势做了分析和展望。

关键词：微通道散热设计制造

AFAP1-AS1: a rising star among oncogenic long non-coding RNAs

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Science China(Life Sciences) 2021年第10期64卷 1602-1611页

作者： Fang Xiong Kunjie Zhu Su Deng Hongbin Huang Liting Yang Zhaojian Gong Lei Shi Yi He Yanyan Tang Qianjin Liao jianjun yu Xiaoling Li Yong Li Guiyuan Li Zhaoyang Zeng Wei Xiong Shanshan Zhang Can Guo Science and Technology on Information System Engineering Laboratory National University of Defense TechnologyChangsha 410000China Department of Periodontology Center of StomatologyXiangya HospitalCentral South UniversityChangsha 410078China NHC Key Laboratory of Carcinogenesis and Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education of China Cancer Research InstituteCentral South UniversityChangsha 410078China Hunan Key Laboratory of Cancer Metabolism Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of MedicineCentral South UniversityChangsha 410013China Department of Oral and Maxillofacial Surgery The Second Xiangya HospitalCentral South UniversityChangsha 410011China Department of Medicine Dan L Duncan Comprehensive Cancer CenterBaylor College of MedicineHoustonTexasUSA

Long non-coding RNAs(lncRNAs)have become a hotspot in biomedical *** interest reflects their extensive involvement in the regulation of the expression of other genes,and their influence on the occurrence and development of a variety of human *** filament associated protein 1-Antisense RNA 1(AFAP1-AS1)is a recently discovered oncogenic *** is highly expressed in a variety of solid tumors,and regulates the expression of downstream genes and signaling pathways through adsorption and competing microRNAs,or by the direct binding to other ***,AFAP1-AS1 promotes proliferation,chemotherapy resistance,and resistance to apoptosis,maintains stemness,and enhances invasion and migration of tumor *** paper summarizes the research concerning AFAP1-AS1 in malignant tumors,including the clinical application prospects of AFAP1-AS1 as a potential molecular marker and therapeutic target of malignant *** also discuss the limitations in the knowledge of AFAP1-AS1 and directions of further ***1-AS1 is expected to provide an example for studies of other lncRNA molecules.

关键词： AFAP1-AS1 metastasis proliferation anti-cancer drug PD-1 immunotherapy

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基于主题模型的结构化Web服务发现机制

北京航空航天大学学报 2008年第6期34卷 734-738页

作者：陈江锋于建军北京航空航天大学软件开发环境国家重点实验室北京100191 中国科学院计算机网络信息中心北京100190

提出了基于主题模型(topic model)的结构化Web服务发现机制.利用LDA(Latent Dirichlet Allocation)生成概率模型,将Web服务(Web service)建模为结构化文本文档.一个文档视作主题的概率分布,主题又由关键词的概率分布组成,从而提供基于... 详细信息

提出了基于主题模型(topic model)的结构化Web服务发现机制.利用LDA(Latent Dirichlet Allocation)生成概率模型,将Web服务(Web service)建模为结构化文本文档.一个文档视作主题的概率分布,主题又由关键词的概率分布组成,从而提供基于主题的Web服务检索.同时,利用Web服务的结构化特性,将Web服务描述文档表示为有向无环图,利用n阶谱核测量Web服务文档的相似度,实现Web服务结构化信息的发现.通过实验分析对比,基于主题模型的结构化Web服务发现机制有效提高了Web服务发现的效率和精确率.

关键词：主题模型 Web服务 n阶谱核服务发现

SAR-PPO(Segmented Adaptive Reward): Robotic Arm Open Door Motion Control With Reinforcement Learning Based on Segmented Adaptive Reward

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SAR-PPO(Segmented Adaptive Reward): Robotic Arm Open Door Mo...

实现125.52 Gbit/s PDM-QPSK信号在光载无线系统中的实时传输

第43届中国控制会议

作者： jianjun yu Xinyue Feng Daoxiong Gong yunai Gong the Beijing Key Laboratory of Computational Intelligence and Intelligent Systems Beijing University of Technology

Door opening, as one of the common actions in daily life, has become an important direction for robotic arm applications. Different door handles open in different ways, to enable the robotic arm to complete the corresponding door-opening operation according to the handle category, the Proximal Policy Optimization algorithm is used to open the door. Opening the door contains a multi-segment process such as approaching the handle, operating the handle and pushing the door open. The sparse reward that focuses only on the result of opening the door will lead to the extension of the training time of the robotic arm,or even fail to converge. To address this problem, this paper proposes a segmented adaptive reward. First, consider the segment task of opening the door, design the segmented reward, formulate segmented training rules, and gradually guide the robotic arm to improve the overall training effect. At the same time, the reward adds an adaptive weight adjustment mechanism, which adaptively adjusts the weights according to the current stage of attention to different tasks, and then matches the segmented training to accelerate the training speed. In a simulation environment, the experimental results show that the door opening success rate of our algorithm is 61.04% higher than that of the original PPO algorithm, and it can achieve the round handle opening task that cannot be solved by the original algorithm.

关键词： Segmented Adaptive Reward Proximal Policy Optimization Algorithm Robotic Arm Motion Control

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光学学报 2022年第15期42卷 19-24页

作者：魏怡王凯辉张宇余建军复旦大学通信科学与工程系电磁波信息科学教育部重点实验室上海200433

光载无线通信(RoF)系统结合了光纤和无线通信的优势,具有大带宽、低损耗、灵活移动等特性,在未来超5G/6G通信网络中有广阔的发展前景。这里实现了传输速率超过100 Gbit/s的偏振复用正交相移键控(PDM-QPSK)信号在基于商用光传送网(OTN)... 详细信息

光载无线通信(RoF)系统结合了光纤和无线通信的优势,具有大带宽、低损耗、灵活移动等特性,在未来超5G/6G通信网络中有广阔的发展前景。这里实现了传输速率超过100 Gbit/s的偏振复用正交相移键控(PDM-QPSK)信号在基于商用光传送网(OTN)实时处理的RoF系统中的有效传输。分别实验演示了频率为22 GHz、传输速率为125.52 Gbit/s的PDM-QPSK信号在20 km+25 km两跨光纤和频率为60 GHz、传输速率为125.52 Gbit/s的PDM-QPSK信号在20 km+25 km两跨光纤和1 cm无线链路中的传输。结果显示启用开销为15%的软判决前向纠错(SD-FEC)编码可以实现无差错传输。另外,提出在实时处理的RoF系统中采用集成的双极化马赫-曾德尔调制器(DP-MZM)进行偏振调制的新方法,RoF系统降低了系统复杂度,在未来移动数据通信网络中有很大的应用价值。

关键词：光通信实时处理光载无线通信双极化马赫-曾德尔调制器偏振复用正交相移键控

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简约风格茶叶包装设计研究

包装工程 2024年第16期45卷 319-322页

作者：郁建军太原学院太原030000

目的探讨简约风格的茶叶包装设计策略,为茶叶包装提供参考,从而达到“少即是多”的设计目的,使茶叶品牌符号得以突出和强化。方法简要概述中国的茶叶包装文化,分析我国茶叶包装设计现状,探究茶叶包装简约设计的意义,并从三个方面对简约... 详细信息

目的探讨简约风格的茶叶包装设计策略,为茶叶包装提供参考,从而达到“少即是多”的设计目的,使茶叶品牌符号得以突出和强化。方法简要概述中国的茶叶包装文化,分析我国茶叶包装设计现状,探究茶叶包装简约设计的意义,并从三个方面对简约风格的茶叶包装设计策略展开论述。结论通过视觉形象简约化、包装结构简约化、包装材料简约化这三个方面的策略,能够实现简约风格的茶叶包装设计,达到“少即是多”的设计目的。

关键词：茶叶包装设计简约设计极简风格品牌形象

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C-Band 53.76 Tbit/s Transmission Based on Bit Allocation Optimization with Raman Amplification

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激光与光电子学进展 2023年第7期60卷 430-434页

作者： Ding Junjie Wang Chen Ju Zhou Zhu Bowen Sang Bohan Liu Bo yu jianjun Key Laboratory for Information Science of Electromagnetic Waves(MoE) Fudan UniversityShanghai 200433China Nanjing University of Information Science and Technology Nanjing 210044JiangsuChina

We experimentally demonstrate an 80-channel wavelength division multiplexing(WDM)transmission system over a 400 km fiber *** amplification results in a non-flat WDM signal ***,bit allocation optimization is used to enable different channels to carry different order quadrature amplitude modulation signals according to their optical signal-noise-ratios.A neural network equalizer based on a convolutional neural network(CNN),long shortterm memory(LSTM)network,and fully connected(FC)layer structure is adopted in Rx digital signal processing,in which CNN is used for characteristic extraction,LSTM is used for equalization and demodulation,and FC layers are used for *** transmission,the bit error rate of all channels is below the 25%soft-decision forward error correction threshold,and the line rate reaches 53.76 Tbit/s.

关键词： wavelength division multiplexing transmission Raman amplification bit allocation optimization neural network equalizer