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Characteristics of Multiply π Phase shifted Long period Fiber Gratings

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Chinese Journal of Lasers 2001年第1期 73-77页

作者： zhu songlin zhang xianmin chen kangsheng (Department of Information & Electronic Engineering, Zhejiang University, Hangzhou 310027, China) received march 3, 2000 Revised manuscript received May 12, 2000

The transmission spectra of multiply π phase shifted long period fiber gratings (LPFG’s) are analyzed by a combination of coupled mode theory and the fundamental matrix method. The theoretical simulation shows that the LPFG’s can act as novel bandpass filters with two dominant pass bands when multiple π phase shifts are introduced at particular locations along the grating.

关键词： long period fiber grating coupled mode theory fundamental matrix

SALIRI-based(raltitrexed plus irinotecan)therapy as a second-line treatment for patients with metastatic colorectal cancer(SALLY):A prospective,multicenter,non-interventional,registry study

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Cancer Communications 2024年第8期44卷 910-914页

作者： Shuqui Qin Jin Li Aiping Zhou Yanqiao zhang Xianglin Yuan Liangjun zhu Baoli Qin Shan Zeng Lin Shen Ying Yuan Weibo Wang Jun Liang Xianwen zhang Feng Ye Ping chen HuaizhangWang Zhenyan Yu Lu Yue Yong Fang Jianping Xiong Jianwei Yang Yiye Wan Xianli Yin Wenling Wang Nong Xu XiaohongWang Zemin Xiao Huafang Su YingWang kangsheng Gu Shuiping Tu Zishu Wang Bo Liu Xiaohua Hu Weixian Liu Xiaofeng Li Department of Oncology Nanjing Tianyinshan HospitalNanjingJiangsuP.R.China Department of Medical Oncology Shanghai East HospitalShanghaiP.R.China Department of Medical Oncology Cancer Hospital Chinese Academy of Medical SciencesBeijingP.R.China Department of Gastroenterology Harbin Medical University Cancer HospitalHarbinHeilongjiangP.R.China Department of Medical Oncology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubeiP.R.China Department of Medical Oncology Jiangsu Cancer HospitalNanjingJiangsuP.R.China Department of Gastroenterology Liaoning Cancer Hospital&InstituteShenyangLiaoningP.R.China Department of Oncology Xiangya HospitalCentral South UniversityChangshaHunanP.R.China Department of Medical Oncology Beijing Cancer HospitalBeijingP.R.China Department of Medical Oncology The Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangP.R.China Department of Chemotherapy Shandong Provincial HospitalJinanShandongP.R.China Department of Medical Oncology Peking University International HospitalBeijingP.R.China Department of Medical Oncology Northern Jiangsu People’s HospitalYangzhouJiangsuP.R.China Department of Medical Oncology The First Affiliated Hospital of Xiamen UniversityXiamenFujianP.R.China Department of Medical Oncology General Hospital of NingxiaMedical UniversityYinchuanNingxiaP.R.China Department of Integrated Chinese andWestern Medicine Henan Cancer HospitalZhengzhouHenanP.R.China Department of Medical Oncology Mudanjiang Tumor HospitalMudanjiangHeilongjiangP.R.China Department of Oncology Qingdao Municipal Hospital(Group)QingdaoShandongP.R.China Department of Medical Oncology Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouZhejiangP.R.China Department of Medical Oncology The First Affiliated Hospital of Nanchang UniversityNanchangJiangxiP.R.China Department of Abdominal Oncology Fujian Cancer HospitalFuzhouFujianP.R.China Department of Gastroent

Primary chemotherapy options for colorectal cancer(CRC)involve four key drugs:fluorouracils(5-FU),oxaliplatin,irinotecan and *** first-line regimen consists of 5-FU and leucovorin combined with oxaliplatin(FOLFOX),while the second-line regimen involves 5-FU and leucovorin combined with irinotecan(FOLFIRI)for metastatic CRC(mCRC)in China[1].

关键词： drugs chemotherapy FOLFIRI

The Encoder/Decoder based on Parallel FBGs in Optical CDMA System

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The Encoder/Decoder based on Parallel FBGs in Optical CDMA S...

Topological and Shape Optimization of Flexure Hinges for Designing Compliant Mechanisms Using the Level Set Method

2001 International Conferences on Info-tech and Info-net

作者： Ding Meiling Ran Jia zhang xianmin chen kangsheng Department of Information Science ＆ Electronic Engineering Zhejiang University

ISBN: (纸本)0780370104;9780780370104

＜正＞Put forward the encoder/decoder based on parallel fiber Bragg gratings（FBGs） in optical code division multiple access（OCDMA） system,and their principles are analyzed by transfer function *** these devices,we design a direct sequence（DS） version of OCDMA *** simulation result is given,as well as the power efficiency of the system,maximum data bit rate and bit error rate（BER） are investigated.

关键词： Optical fiber communication Optical code division multiple access Encoder and decoder Fiber Bragg gratings

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Chinese Journal of Mechanical Engineering 2019年第1期32卷 42-53页

作者： Benliang zhu xianmin zhang Min Liu Qi chen Hai Li Guangdong Provincial Key Laboratory of Precision Equipment and Manufacturing Technology South China University of Technology East China Jiaotong University

A flexure hinge is a major component in designing compliant mechanisms that o ers unique possibilities in a wide range of application fields in which high positioning accuracy is required. Although various flexure hinges with di erent configurations have been successively proposed, they are often designed based on designers' experiences and inspirations. This study presents a systematic method for topological optimization of flexure hinges by using the level set method. Optimization formulations are developed by considering the functional requirements and geometrical constraints of flexure hinges. The functional requirements are first constructed by maximizing the compliance in the desired direction while minimizing the compliances in the other directions. The weighting sum method is used to construct an objective function in which a self-adjust method is used to set the weighting factors. A constraint on the symmetry of the obtained configuration is developed. Several numerical examples are presented to demonstrate the validity of the proposed method. The obtained results reveal that the design of a flexure hinge starting from the topology level can yield more choices for compliant mechanism design and obtain better designs that achieve higher performance.

关键词： Topology optimization Compliant mechanisms Flexure hinges Level set method

偏振模色散补偿控制中偏振度技术的性能(英文)

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光子学报 2005年第8期34卷 1213-1216页

作者：刘汉奎章献民陈抗生浙江大学信息与电子工程学系

基于主偏振态理论,导出了光信号偏振度的解析表达式.并对40Gb/s光传输系统中的信号偏振度受各种因素的影响进行了数值模拟,包括啁啾、脉冲形状、脉冲宽度、自发辐射噪声以及消光比等.结果表明,偏振度技术能有效地监测和控制40Gb/s系统... 详细信息

基于主偏振态理论,导出了光信号偏振度的解析表达式.并对40Gb/s光传输系统中的信号偏振度受各种因素的影响进行了数值模拟,包括啁啾、脉冲形状、脉冲宽度、自发辐射噪声以及消光比等.结果表明,偏振度技术能有效地监测和控制40Gb/s系统中小于37.5ps的偏振模色散.而且发现就最大化偏振度技术对差分群延时的容许范围而言,脉冲的1/e强度半宽取0.45个位宽(11.25ps)是最优的.

关键词：光纤通信偏振模色散补偿差分群延时偏振度

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双波长光纤光栅的矩阵分析

光子学报 2000年第1期29卷 87-90页

作者：鲍吉龙章献民陈抗生周文浙江大学信息与电子工程系杭州310027

本文在分析双波长光栅特征的基础上，结合耦合模理论和矩阵分析方法，提出了分析双波长光栅的一种数学模型，并在此基础上，采用矩阵分析方法对双波光栅进行了理论分析，得到的结果与实验结果基本吻合．

关键词：光纤光栅矩阵分析双波长光栅传感器

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布里渊散射谱相干检测的消偏振衰落技术

光学学报 2005年第9期25卷 1191-1194页

作者：刘迪仁宋牟平章献民陈抗生浙江大学信息与电子工程学系

在布里渊光时域反射计(BOTDR)的相干检测系统中,为减小偏振失配对布里渊谱测量精度的影响,针对后向布里渊散射光偏振态沿光纤随机变化,而同一记录点在重复采样周期内几乎不变的特点,结合偏振分集和扩展的思想,提出了实现简单而有效的时... 详细信息

在布里渊光时域反射计(BOTDR)的相干检测系统中,为减小偏振失配对布里渊谱测量精度的影响,针对后向布里渊散射光偏振态沿光纤随机变化,而同一记录点在重复采样周期内几乎不变的特点,结合偏振分集和扩展的思想,提出了实现简单而有效的时域偏振分集技术。理论分析表明,不管布里渊散射信号光的偏振态如何随机变化,采用该技术有较稳定的信号光功率与本振光被外差接收,接收信号对偏振态随机变化不敏感。系统实际上可基本不改变原系统体系,只对本振光施以无循环反馈的简单偏振控制。在布里渊时域反射计系统中实验对比了采用与不采用该技术的结果,表明前者的接收信号功率幅度约是后者的四分之一,抑制幅度起伏效果明显。

关键词：光电子学光纤传感器布里渊散射相干检测偏振

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模拟退火算法在无端偏振控制器中的应用

光子学报 2005年第6期34卷 820-824页

作者：李伟文章献民陈抗生邹英寅浙江大学信息与电子工程学系浙江杭州310027

构造了由四个相移范围在0～2π的电光晶体波片组成的偏振控制器,利用模拟退火法作为其反馈控制算法.仿真计算表明,该偏振控制器是无端的,在较优的控制参量下,其输出的偏振态是稳定的,光强波动小于1%.对于四波片偏振控制器,模拟退火算法... 详细信息

构造了由四个相移范围在0～2π的电光晶体波片组成的偏振控制器,利用模拟退火法作为其反馈控制算法.仿真计算表明,该偏振控制器是无端的,在较优的控制参量下,其输出的偏振态是稳定的,光强波动小于1%.对于四波片偏振控制器,模拟退火算法的控制参量研究表明,为得到较佳的控制效果,可把内外循环次数各限制为3次,以减少处理器时间;其初温T0应取在0.1附近;温度更改常数p宜取在0.2左右;状态产生常数s对输出的稳定性影响最大,仿真说明设在0.005～0.01间为好.

关键词：光通信无端偏振控制器模拟退火算法控制参量偏振态

基于模拟退火算法的偏振控制器波片相移特性研究

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光学学报 2005年第4期25卷 449-453页

作者：李伟文章献民陈抗生邹英寅浙江大学信息与电子工程系杭州310027

按晶体波片的快轴与水平方向成0°、45°、0°、45°顺序排列构造四波片偏振控制器.固定各波片的快慢轴,利用模拟退火算法进行反馈控制,通过改变各波片的相位得到所需的偏振态.仿真结果说明,利用模拟退火算法进行负反馈控制,其收敛速度... 详细信息

按晶体波片的快轴与水平方向成0°、45°、0°、45°顺序排列构造四波片偏振控制器.固定各波片的快慢轴,利用模拟退火算法进行反馈控制,通过改变各波片的相位得到所需的偏振态.仿真结果说明,利用模拟退火算法进行负反馈控制,其收敛速度较快,收敛后光强波动小于2%;该控制器能在各波片相移范围限制在0～2π情况下实现偏振态的无端控制.为消除可能出现的复位死角,在模拟退火算法基础上加入强制无端复位方法,复位过程稳定.控制过程中该控制器各波片的相移步长可变,但寻优过程中最大步长不超过3.36°,强制复位过程中最大步长不超过18°,因此控制电压的变化平缓.

关键词：光纤通信技术偏振控制器模拟退火算法无端复位波片相移