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Research on Pressure Tactile Sensing Technology Based on Fiber Bragg Grating Array

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Photonic Sensors 2015年第3期5卷 263-272页

作者： Jinxue song Qi JIANG Yuanyang HUANG Yibin LI yuxi JIA Xuewen RONG Rui song Hongbin LIU School of Control Science and Engineering Shandong University Jinan 250061 China School of Materials Science and Engineering Shandong University Jinan 250061 China Department of lnformaties King's College London London WC2R 2LS UK

A pressure tactile sensor based on the fiber Bragg grating （FBG） array is introduced in this paper, and the numerical simulation of its elastic body was implemented by finite element software （ANSYS）. On the basis of simulation, fiber Bragg grating strings were implanted in flexible silicone to realize the sensor fabrication process, and a testing system was built. A series of calibration tests were done via the high precision universal press machine. The tactile sensor array perceived external pressure, which is demodulated by the fiber grating demodulation instrument, and three-dimension pictures were programmed to display visually the position and size. At the same time, a dynamic contact experiment of the sensor was conducted for simulating robot encountering other objects in the unknown environment. The experimental results show that the sensor has good linearity, repeatability, and has the good effect of dynamic response, and its pressure sensitivity was 0.03 nm/N In addition, the sensor also has advantages of anti-electromagnetic interference, good flexibility, simple structure, low cost and so on, which is expected to be used in the wearable artificial skin in the future.

关键词： Array tactile sensation fiber Bragg grating finite element analysis

Spectral filtering effect on multi-pulsing induced by chirped fiber Bragg grating in dispersion-managed mode-locked Yb-doped fiber lasers

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High Power Laser Science and Engineering 2021年第3期9卷 94-100页

作者： Dongyu Yan Bowen Liu Defeng Zou Jie Guo yuxi Chu Youjian song Minglie Hu Ultrafast Laser Laboratory School of Precision Instrument and Optoelectronics EngineeringKey Laboratory of Optoelectronic Information Technology(Ministry of Education)Tianjin UniversityTianjin 300072China

We numerically and experimentally investigate the multi-pulsing mechanism in a dispersion-managed mode-locked Ybdoped fiber ***-pulsing occurs primarily owing to the inherent filtering effect of the chirped fiber Bragg *** spectral filtering effect restricts the spectral broadening induced by self-phase modulation and causes extra loss,leading to a decreased pump power threshold for the multi-pulsing *** simulations show that multi-pulsing emerges at a lower pump power when the spectral filter bandwidth becomes *** the experiment,the spectral width increases as the net cavity dispersion approaches *** with wider spectral widths experience more loss from the spectral filtering effect,leading to a decreased pump power threshold for ***,the net cavity dispersion also has an impact on the multi-pulsing *** on this conclusion,we devise a strategy to obtain single-pulsing operation with the shortest pulse width and the highest pulse energy.

关键词： fiber optics oscillators nonlinear fiber optics ultrafast lasers

A Theoretical Investigation on Photo-Electronic Property of Rac-Catena-Poly [nickel （Ⅱ）-di- μ-tryptophanato ]

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光学应用（中英文版） 2013年第4期2卷 56-62页

作者： Ran Zhang Ruojing song yuxi Sun Qingli Hao Institute of material Chemistry Binzhou University Binzhou 256600 P. R. China Key Laboratory of Photoinduced Functional Materials Mianyang Normal University Mianyang 621000 P.R. China Key Laboratory of Life-Organic Analysis Qufu Normal University Qufu 273165 P. R. China Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials Nanjing University of Science and

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小分子糖-罗望子多糖复合凝胶特性研究

中国食品学报 2024年第4期24卷 69-79页

作者：王枫艾连中赖凤羲张汇谢凡宋子波上海理工大学健康科学与工程学院、上海食品微生物工程技术研究中心上海200093 云南猫哆哩集团食品有限责任公司云南玉溪653100

探究不同小分子糖(蔗糖、果糖和葡萄糖)含量对罗望子多糖(TSP)复合凝胶特性的影响。分析小分子糖-TSP复合凝胶的流变特性、持水性、质构特性,并通过低场核磁共振技术分析其水分分布情况。结果表明:质量分数45%~60%的蔗糖和果糖及质量分... 详细信息

探究不同小分子糖(蔗糖、果糖和葡萄糖)含量对罗望子多糖(TSP)复合凝胶特性的影响。分析小分子糖-TSP复合凝胶的流变特性、持水性、质构特性,并通过低场核磁共振技术分析其水分分布情况。结果表明:质量分数45%~60%的蔗糖和果糖及质量分数40%~55%的葡萄糖能使1%(m/V)的TSP溶液形成凝胶;当蔗糖和果糖的质量分数为55%,葡萄糖质量分数为50%时,蔗糖-TSP复合凝胶的G′、持水性、硬度、内聚性和咀嚼性分别为108.39 Pa,98.20%,65.55 g,0.87和52.55 g,果糖-TSP复合凝胶的G′、持水性、硬度和咀嚼性分别为147.36 Pa,98.57%,62.29 g和44.84 g,葡萄糖-TSP复合凝胶的G′、持水性、硬度、内聚性分别为117.46 Pa,98.56%,61.86 g和48.05 g,都达到最大值,此时凝胶性质最稳定,最有嚼劲。低场核磁结果表明,当蔗糖和果糖质量分数为55%,葡萄糖质量分数为50%时,小分子糖-TSP复合凝胶半结合水含量为99.8%~100%,可能是小分子糖中的羟基与水分子形成较多的氢键,半结合水大幅度增加,TSP链之间交联增多,使得凝胶更加坚固。研究结果可为TSP在食品工业中的应用提供理论依据。

关键词：小分子糖罗望子多糖凝胶流变特性质构特性水分分布

Space Elastic Modal Modeling and Control of A New Generation Solid Bundled Rocket

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Aerospace China 2022年第2期23卷 9-15页

作者： Hong Gang XIN Gaobo LIU yuxi XUE Yu song Pan YANG Xinru Shanghai Academy of Spaceflight Technology Shanghai 201109 Shanghai Institute of Aerospace Systems Engineering Shanghai 201109

In this paper,based upon the characteristics of elastic modal combination of large solid bundled launch vehicles,the finite element theory is used to describe the complex elastic vibration of a solid bundled launch vehicle,and a new three-channel unified elastic vibration equation was *** elastic vibration equation can reflect the coupling between channels and between boosters and core *** issues need consideration in the theoretical derivation,an engineering application was proposed,and the elastic vibration model was *** results of the theoretical derivation and simulation show that the elastic vibration equation of a solid bundled launch vehicle established in the paper is correct and can meet the needs for the engineering application.

关键词： solid bundled rocket finite element elastic vibration coupling

免疫治疗、贝伐珠单抗联合化疗一线治疗晚期驱动基因野生型非鳞非小细胞肺癌的疗效和安全性比较:网状Meta分析

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中国循证医学杂志 2023年第11期23卷 1275-1283页

作者：宋杨朱宇熹重庆医科大学附属第一医院肿瘤科重庆400016 重庆医科大学附属第一医院金山医院肿瘤科重庆401122

目的对免疫治疗与贝伐珠单抗联合化疗、贝伐珠单抗联合化疗、免疫治疗联合化疗、贝伐珠单抗联合免疫治疗、贝伐珠单抗和化疗一线治疗晚期驱动基因野生型非鳞状非小细胞肺癌的疗效及安全性进行网状Meta分析。方法计算机检索PubMed、Emb... 详细信息

目的对免疫治疗与贝伐珠单抗联合化疗、贝伐珠单抗联合化疗、免疫治疗联合化疗、贝伐珠单抗联合免疫治疗、贝伐珠单抗和化疗一线治疗晚期驱动基因野生型非鳞状非小细胞肺癌的疗效及安全性进行网状Meta分析。方法计算机检索PubMed、Embase、Cochrane Library、Web of Science数据库,搜集与研究目的相关的Ⅱ/Ⅲ期随机对照试验(RCT),检索时限均为2010年1月至2022年12月1日。由2名研究者独立筛选文献、提取资料并评价纳入研究的偏倚风险后,采用R 3.6.1软件进行网状Meta分析。结果最终纳入11个RCT,包括5 329例患者和6种治疗组合。Meta分析结果显示,对于无进展生存期(PFS),BIC优于CT[HR=0.34,95%CI(0.18,0.69)],但对于总体生存期(OS),BIC较其余组未显示出明显优势。最佳概率排序结果显示BIC组在OS、PFS、ORR方面最优的概率最大。在所有程序性死亡配体中1(PD-L1)表达亚组中,BIC、BC、IC、CT、BI和B组间的OS无显著差异。IC相较于CT,OS[HR=0.68,95%CI(0.52,0.92)]、PFS[HR=0.58,95%CI(0.45,0.75)]和客观缓解率[HR=0.47,95%CI(0.33,0.66)]都可以得到明显改善。结论在驱动基因阴性晚期非鳞状NSCLC一线治疗中,免疫治疗、贝伐珠单抗疗联合化疗可能会短期改善疗效,但并不改变长期生存时间。免疫治疗联合化疗相较于单纯化疗,可明显改善患者生存期及预后。受纳入研究数量和质量的限制,上述结论尚待更多高质量研究予以验证。

关键词：免疫治疗贝伐珠单抗一线治疗驱动基因阴性晚期非鳞非小细胞肺癌

Cavity-induced ATS effect on a superconducting Xmon qubit

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Chinese Physics B 2018年第8期27卷 248-253页

作者： Xueyi Guo Hui Deng Jianghao Ding Hekang Li Pengtao song Zhan Wang Luhong Su Yanjun Liu Zhongcheng Xiang Jie Li Yirong Jin yuxi Liu Dongning Zheng Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Institute of Microelectronics Tsinghua UniversityBelting 100084China Tsinghua National Laboratory for Information Science and Technology（TNList） Beijing 100084China

We couple a ladder-type three-level superconducting artificial atom to a cavity. Adjusting the artificial atom to make the cavity be resonant with the two upper levels, we then probe the lower two levels of the artificial atom. When driving the cavity to a coherent state, the probe spectrum shows energy level splitting induced by the quantized electromagnetic field in the cavity. This splitting size is related to the coupling strength between the cavity and the artificial atom and, thus, is fixed after the sample is fabricated. This is in contrast to the classical Autler-Townes splitting of a three-level system in which the splitting is proportional to the driving amplitude, which can be continuously changed. Our experiment results show the difference between the classical microwave driving field and the quantum field of the cavity.

关键词： superconducting qubit circuit QED Autler-Townes splitting

Hybrid femtosecond laser system based on a Yb:KGW regenerative amplifier for N_P polarization

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Chinese Optics Letters 2019年第4期17卷 71-74页

作者： Dongyu Yan Bowen Liu yuxi Chu Huanyu song Lu Chai Minglie Hu Chingyue Wang Ultrafast Laser Laboratory Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education School of Precision Instruments and Opto-electronics Engineering Tianjin University

We report a hybrid femtosecond laser system based on a femtosecond Yb-doped fiber laser and a Yb-doped potassium gadolinium tungstate(Yb:KGW) regenerative amplifier. To match the central wavelength of the seed source, a Yb:KGW crystal is used in the regenerative amplifier for N_p polarization. We study and optimize the dynamics of nonlinear amplification to alleviate the gain narrowing effect. With optimization, the system can output 270 fs pulses with 21 μJ pulse energy at a 60 kHz repetition rate.

关键词： hybrid femtosecond femtosecond Yb-doped 60 kHz repetition

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基于网格的无线网络室内协作定位算法

华中科技大学学报（自然科学版） 2015年第5期43卷 114-118页

作者：罗娟贺赞贻张玉玺宋艳超湖南大学信息科学与工程学院湖南长沙410082 白城兵器试验中心吉林白城137001 华中科技大学电子信息与通信学院湖北武汉430074

针对室内定位精度低的问题,通过多种无线网络间的协作定位,提出一种基于网格的无线网络室内协作定位算法.与区域单一定位方式不同,该算法将信号覆盖区域划分为网格的形式,获取多种信号信息,以判断网格的可定位性,并为网格内所有网络分... 详细信息

针对室内定位精度低的问题,通过多种无线网络间的协作定位,提出一种基于网格的无线网络室内协作定位算法.与区域单一定位方式不同,该算法将信号覆盖区域划分为网格的形式,获取多种信号信息,以判断网格的可定位性,并为网格内所有网络分配权值,判定是否可进行多种网络的协作定位,给出最优定位组合方案.只须在离线阶段采集室外网络信号,扩充协作定位指纹库,该算法即可直接扩展到室外定位.仿真结果表明:与单一网络定位算法以及等权分配算法相比,提出的方案不仅有效提高了定位精度,而且提高了网络覆盖区域的可定位率.

关键词：室内定位协作定位异构网络基于位置的服务网格