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Wearable ultrasensitive and rapid human physiological monitoring based on microfiber Sagnac interferometer

Science China(Information Sciences) 2024年第3期67卷 281-290页

作者： Xin WANG Hongyou ZHOU Meihua CheN yongcheng he Zhishen ZHANG Jiulin GAN Zhongmin YANG State Key Laboratory Luminescent Materials and Devices Institute of Optical Communication MaterialsSpecial Glass Fiber and Device Engineering Technology Research and Development Center of Guangdong ProvinceGuangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSouth China University of Technology Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan University

High-sensitive and fast-responding flexible strain sensors are essential for the smart wearable devices that precisely and dynamically perceive the weak deformations induced by human physiological signals. here, a flexible strain sensor via polydimethylsiloxane(PDMS)-encapsulated microfiber Sagnac interferometer was designed and prepared for monitoring the human pulse signals and sound vibrations. The sensor achieved a record-breaking sensitivity(gauge factor, GF = 9977) and an extremely low detection limit(0.00025%) due to the strong polarization-dependent coupling effect in the microfiber coupler and the polarization-mixing effect in the Sagnac loop. The relative intensity demodulation method also enabled a fast response time of 10 μs. The wearable pulse measurements were implemented by attaching this flexible strain sensor directly to human skin at various locations and the waveform details were accurately captured. Taking advantage of the ultra-high sensitivity and fast response performance of the prepared sensor, the real-time dynamic acquisition of the underwater weak signal, such as the hydro-acoustic waves with a wide range of 20 Hz–16.86 k Hz, has been demonstrated. These initial results pave the way for a new and innovative category of underwater wearable devices with rapid detection of human physiological signals and weak environmental vibrations.

关键词： flexible strain sensor microfiber Sagnac interferometer underwater detection

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Multiplexing technology based on SQUID for readout of superconducting transition-edge sensor arrays

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Chinese Physics B 2022年第10期31卷 220-230页

作者： Xinyu Wu Qing Yu yongcheng he Jianshe Liu Wei Chen School of Integrated Circuits Tsinghua UniversityBeijing 100084China

Multiplexing technologies based on superconducting quantum interference devices(SQUIDs) are crucial to cryogenic readout of superconducting transition-edge sensor(TES) arrays. Demands for large-scale TES arrays promote the development of multiplexing technologies towards large multiplexing factors and low readout noise. The development of multiplexing technologies also facilitates new applications of TES arrays in a wide range of frequencies. here we summarize different types of SQUID-based multiplexing technologies including time-division multiplexing, code-division multiplexing, frequency-division multiplexing and microwave SQUID multiplexing. The advances and parameter constraints of each multiplexing technology are also discussed.

关键词： superconducting transition-edge sensor arrays superconducting quantum interference devices multiplexing technology cryogenic readout

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煤矿资源储量动态管理技术体系构建

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陕西煤炭 2024年第6期43卷 144-147,156页

作者：朱占荣任永贤马祖飞贺永成陕西省一八五煤田地质有限公司陕西榆林719000 榆林市自然资源和规划局陕西榆林719000

强化煤矿资源动态管理是提高回采率的重要措施,也是监督矿产资源合理利用的重要依据。为阐明煤矿资源储量管理存在的问题,构建煤矿资源储量动态管理技术体系,系统梳理了煤矿资源储量动态管理相关的标准及文件,整理和分类了煤矿资源储量... 详细信息

强化煤矿资源动态管理是提高回采率的重要措施,也是监督矿产资源合理利用的重要依据。为阐明煤矿资源储量管理存在的问题,构建煤矿资源储量动态管理技术体系,系统梳理了煤矿资源储量动态管理相关的标准及文件,整理和分类了煤矿资源储量相关的主要技术指标。结合日常地测技术服务及煤矿资源储量报告评审工作,指出了煤矿在资源储量动态管理中存在的主要问题,构建了煤矿资源储量动态管理技术体系的初步模型,为实现煤矿资源的高效利用与安全生产的有机融合提供了借鉴。

关键词：资源储量动态管理技术体系煤矿回采率资源储量年报

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Switchable photothermal conversion efficiency for reprogrammable actuation

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npj Flexible Electronics 2023年第1期7卷 70-78页

作者： yongcheng he Haojun Liu Jiajia Luo Nuo Li Lihua Li Puxian Xiong Jiulin Gan Zhongmin Yang State Key Laboratory Luminescent Materials and Devices Institute of Optical Communication MaterialsSpecial Glass Fiber and Device Engineering Technology Research and Development Center of Guangdong ProvinceGuangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSouth China University of Technology510641 GuangzhouChina Future Institute of Technology School of Information and Optoelectronic Science and EngineeringSouth China Normal University510515 GuangzhouChina

Reprogrammable soft matter brings flexibility to soft robots so that they can display various motions,which is flourishing in soft ***,the reprogramming of photoresponsive materials used in soft robots is time-consuming using existing *** this study,we promote a strategy for rapid reprogramming via switchable photothermal conversion efficiency(PCE).The liquid crystalline elastomers doped with semiconductor bismuth compounds(Bi-LCE)used in this work exhibited large photothermal actuation with over 35%shrinkage in 5 s at high PCE state,which demonstrated little deformation at low PCE ***,the material was capable of being reprogrammed up to 10 times,with only 20 min required for one PCE reversible *** on this switchable PCE effect,the same Bi-LCE film displayed various shape changes through different programmable ***,a reprogrammable hollow tube made of PCE reprogrammable materials could tune the diameter,cross-section configuration,and surface morphology,which was crucial for microfluidics *** materials provide endless possibilities for reusability and sustainability in robotics.

关键词： programming consuming bismuth

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Design and implementation of feedback logic of FOFB for hePS

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Radiation Detection Technology and Methods 2023年第3期7卷 372-381页

作者： Daoyuan Wang Dapeng Jin Peng Zhu Zhexin Xie Lei Zeng Yuliang Zhang yongcheng he Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Chinese Academy of SciencesDongguan 523803GuangdongChina University of Chinese Academy of Sciences Beijing 100049China

Purpose As a fourth-generation light source,High Energy Photon Source(hePS)has much more stringent requirements to the beam orbit stability in both horizontal and vertical directions than the previous sources due to the much smaller beam *** A Fast Orbit FeedBack(FOFB)system,with the closed-loop bandwidth around 500 Hz,is needed to meet the critical *** latency of the FOFB system is the key to achieve these *** Proper design and implementation of the feedback logic to have low latency is illustrated in the *** accuracy is kept in the whole operation except for the last-minute data translation into 32-bit floating point number.

关键词： hePS Fast orbit feedback system FPGA Latency Pipeline

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基于Miller金字塔原理的模拟教学法对内科住院医师及实习医生的影响

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中国继续医学教育 2024年第16期16卷 102-106页

作者：刘晓刚彭曦桐郭玉军何永成李秀琴深圳恒生医院肾内科广东深圳518102 深圳恒生医院科教科广东深圳518102 深圳恒生医院心内科广东深圳518102

目的探讨在内科住院医师及实习医生中采用基于Miller金字塔原理的模拟教学法的应用效果。方法选取2021年1月-2023年7月深圳恒生医院内科的住院医师及实习医生共56名作为研究对象,采用随机信封法分为A组(28名)与B组(28名),A组给予常规教... 详细信息

目的探讨在内科住院医师及实习医生中采用基于Miller金字塔原理的模拟教学法的应用效果。方法选取2021年1月-2023年7月深圳恒生医院内科的住院医师及实习医生共56名作为研究对象,采用随机信封法分为A组(28名)与B组(28名),A组给予常规教学法,B组在A组的基础上给予基于Miller金字塔原理的模拟教学法,比较2组考核成绩(理论考试、实践考试)、岗位胜任能力及教学满意度。结果教学后,A组出科理论考试成绩为(81.37±3.15)分,实操考试成绩为(80.63±3.96)分,B组出科理论考试成绩为(91.43±3.81)分、实操考试成绩为(90.49±4.32)分,2组差异有统计学意义(P<0.05);B组岗位胜任能力各维度(临床基本能力、医生职业素质、掌握运用医学知识、医患沟通能力、团队合作能力、基本公共卫生合作能力、信息与管理能力、学术研究能力)评分较A组均更高,差异有统计学意义(P<0.05);2组教学满意度比较,B组教学满意度(92.86%)高于A组(71.43%),差异有统计学意义(P<0.05)。结论对内科住院医师及实习医生采用基于Miller金字塔原理的模拟教学法,能够从理论与实操层面提升医师专业能力与岗位胜任能力,因此其对该教学模式满意程度较高。

关键词： Miller金字塔原理内科住院医师实习医生考核成绩岗位胜任能力教学满意度

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The machine protection system for CSNS

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Radiation Detection Technology and Methods 2021年第2期5卷 273-279页

作者： Kang Mingtao Zhang Yuliang Jin Dapeng he yongcheng Zhan Mingchuan Zhu Peng Wu Xuan Guo Fengqin Wang Lin Institute of High Energy Physics CASBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China University of Chinese Academy of Sciences Beijing 100049China

Background The China Spallation Neutron Source(CSNS)accelerator consists of an 80 MeV H-LINAC,a 1.6 GeV rapid cycling synchrotron(RCS)and two beam transport *** uncontrolled beam may permanently damage the components or lead to very high residual radiation dose along the beam *** the equipment protection must be deliberately designed and *** The machine protection system(MPS)protects components from being damaged by the *** response time requirement for the CSNS MPS is less than 20 ms,so the PLC(programmable logic controller)was adopted to implement the interlock *** The MPS was implemented as a two-tier architecture system,and developed through utilizing PLC and Experimental Physics and Industrial Control System(EPICS)software *** application logic was taken into careful consideration during the implementation *** embedded CPU module can function as an IOC accessing PLC I/O modules through the sequence CPU,with an embedded Linux operation *** The interlock logic and heartbeat functions were tested with all functions *** consumption has been measured thoroughly since the important requirement,which is around 15 ms to stop the *** MPS was completed in Sep.2017 and then put into *** has been operating smoothly for more than 3 *** has played an important role in every stage of CSNS’s commissioning and operation and achieved high reliability during the user’s experiment *** accelerator recently runs stably with low equipment failure.

关键词： China Spallation Neutron Source Machine protection system Experimental physics and industrial control system Programmable logic controller

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Measurement of the neutron total cross section of^(9)Be at the Back-n white neutron source of CSNS

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Chinese Physics C 2024年第8期48卷 140-152页

作者： Jiangbo Bai Jingyu Tang Liqun Shi Yonghao Chen Han Yi Jie Bao Yu Bao Ping Cao Haolei Chen Zhen Chen Zengqi Cui Ruirui Fan Changqing Feng Keqing Gao Xiaolong Gao MinHao Gu Changcai Han Guozhu he yongcheng he Yang Hong Yiwei Hu Hanxiong Huang Xiru Huang Haoyu Jiang Wei Jiang Zhijie Jiang Hantao Jing Ling Kang Bo Li Chao Li Jiawen Li Qiang Li Xiao Li Yang Li Jie Liu Shubin Liu Ze Long Guangyuan Luan Changjun Ning Mengchen Niu Binbin Qi Jie Ren Xichao Ruan Zhaohui Song Kang Sun Zhijia Sun Zhixin Tan Xinyi Tang Binbin Tian Lijiao Wang Pengcheng Wang Zhaohui Wang Xiaoguang Wu Xuan Wu Likun Xie Xiaoyun Yang Li Yu Tao Yu Yongji Yu Guohui Zhang Linhao Zhang Qiwei Zhang Xianpeng Zhang Yuliang Zhang Zhiyong Zhang Luping Zhou Zhihao Zhou Kejun Zhu Institute of Modern Physics Fudan UniversityShanghai 200433China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China Sate Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

The neutron total cross section data of^(9)Be are essential in the nuclear structure model research of light nuclei and nuclear power *** neutron total cross section of^(9)Be in the 0.3 eV−120 MeV energy region has been measured using time-of-flight and transmission methods with the Neutron Total Cross Sectional Spectrometer(NTOX)based on the multi-cell fast fission chamber at the China Spallation Neutron Source(CSNS)-Back-n white neutron source(Back-n).The fission count-neutron energy distributions of ^(235)U and ^(238)U without samples and with Be samples with three thicknesses were measured in the double-bunch operation mode for a beam power of 100 *** Bayesian method was used to eliminate the influence of the double-bunch problem on neutron measurement in the energy region above 10 *** neutron total cross section of^(9)Be results was consistent with ENDF/B-VIII.0 evaluation library data in the 0.3 eV−20 MeV energy *** the energy ranges of 0.3 eV to 10 keV and 0.01 to 20 MeV,the deviations between our results and the evaluation results of ENDF/B-VIII.0 were within 2.5%and 15%,*** the resonance energy region,the measured resonance energies in our experiment were 0.63,0.82,and 2.8 MeV,*** results showed that the total cross section uncertainties of three Be samples were within 2.2%in the energy region below 1 *** total cross section uncertainty of 30 mm Be from ^(235)U was the smallest and less than 5%in the energy region of 0.3 eV−120 *** results of this experiment can provide technical support for further data analysis and related nuclear data evaluation.

关键词： ^(9)Be neutron total cross section CSNS Back-n time-of-flight method transmission method multi-cell fast fission chamber

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Rigidity of non-renormalizable Newton maps

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Science China Mathematics 2024年第4期67卷 855-872页

作者： Pascale Roesch yongcheng Yin Jinsong Zeng Institut de Mathématiques de Toulouse Universite Paul SabatierToulouse 31062France School of Mathematical Sciences Zhejiang UniversityHangzhou 310027China College of Mathematics and Statistics Shenzhen UniversityShenzhen 518061China

Non-renormalizable Newton maps are *** precisely,we prove that their Julia sets carry no invariant line fields and that a topological conjugacy between them is equivalent to a quasiconformal conjugacy.

关键词： Newton map non-renormalizable rigidity invariant line field

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机构话语视阈中的教师自主发展

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学术界 2007年第2期 81-87页

作者：何永成温州大学外国语学院浙江温州325007

教师自主是当前师资发展研究中的一个热点话题。本文尝试着眼于我国教师的职业发展,并借鉴机构实践层面的分析视阈,来探讨造成教师“沉默”的话语条件以及制约教师自主的机构因素。

关键词：机构话语教师自主教师发展

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