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Preparation of hydrophilic molecularly imprinted polymers for tetracycline antibiotics recognition

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Chinese Chemical Letters 2011年第5期22卷 611-614页

作者： Peng Wang Xiao Fang Fu Jing Li, Jing Luo Xiao ya Zhao Ming jun sun Yin Zhu Shang Cheng Ye Hubei Entry-Exit Inspection and Quarantine Bureau of PRC Wuhan 430022 China

Hydrophilic molecularly imprinted polymers（MIPs） were prepared using tetracycline as template,methacrylic acid as monomer and glycidilmethacrylate as pro-hydrophilic *** with common MIPs,the imprinting effect and adsorption amounts of hydrophilic MIPs for tetracycline（TC） were greatly improved in water ***,the electrochemical sensor fabricated by modifying hydrophilic MIPs on glassy carbon electrode was developed for the determination of TC in foodstuff samples.

关键词： Hydrophilic molecularly imprinted polymers Electrochemical sensor Tetracycline antibiotics Foodstuff samples

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Hemorrhoid sclerotherapy with the complication of abdominal compartment syndrome： report of a case

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Chinese Medical Journal 2011年第12期124卷 1919-1920页

作者： yaNG Peng WANG ya-jun LI Fei sun Jia-bang Department of General Surgery Xuan Wu Hospital CapitalMedical University Beijing 100053 China

The complications of injection sclerotherapy for hemorrhoid are always local. Herein, we report a case in which a female patient with abdominal compartment syndrome developed after receiving a local injection of a scl... 详细信息

关键词： hemorrhoid sclerotherapy complication abdominal compartment syndrome

Single-blockmeasurement for the cryogenic permanent magnet undulator sorting

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Radiation Detection Technology and Methods 2021年第1期5卷 83-89页

作者： Ling-Ling Gong Xiao-Yu Li Yu-Hui Li ya-jun sun Hui-Hua Lu Ke-yun Gong Qing Guo·Shu-Chen sun Zhi-qiang Li Wan Chen Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose The magnet sorting is a standard step in the undulator fabrication *** shortest undulators period used in the High Energy Photon Source(HEPS)is only 12 *** the short period undulator,the sorting may be more important than the long-period ***,the Helmholtz measurement is used as the input for the *** is the averaged orthogonal magnetization of each *** order to investigate whether the Helmholtz coil measurement is enough for the sorting,a careful study has been *** Firstly,a magnetic camera was used to scan the 3D surface field of a ***,its field integral ismeasured by the stretched *** the measurement,the magnetwas placed at different *** results were checked to seewhether they are consistent with expected features supposing a homogeneous magnetized ***,the results measured by the Helmholtz coil and the stretched wire were *** The surface field scan demonstrates that the field over a magnet block is ***,the field integral measurement by the stretched wire also shows big difference when the different magnet sides toward *** comparison between the stretched wire and the Helmholtz coil measurement shows no *** The study presented in this paper reveals that the homogeneity of the magnetization is ***,the Helmholtz coil data are insufficient to the short-period undulators sorting.

关键词： Magnet sorting Undulator Stretched wire Helmholtz coil

Hall sensor angle error and relative position calibrations for cryogenic permanent magnet undulator of high energy photon source test facility(HEPS-TF)

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Radiation Detection Technology and Methods 2017年第2期1卷 65-70页

作者： Ling-Ling Gong Wan Chen Wen Kang Shu-Chen sun Zhi-Qiang Li Lei Zhang Yu-Feng yang Hui-Hua Lu Xiao-Yu Li Shu-Tao Zhao Xiang-Zhen Zhang ya-jun sun Laboratory of Particle Acceleration Physics and Technology Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Science Beijing 100049China China Spallation Neutron Source(CSNS) Institute of High Energy Physics(IHEP)Chinese Academy of Sciences(CAS)Dongguan 523803China Dongguan Institute of Neutron Science(DINS) Dongguan 523808China

Purpose A new in-vacuum three-dimensional Hall probe magnetic measurement system is under fabrication for characterizing the magnetic performance of the Cryogenic Permanent Magnet Undulator(CPMU).In order to fit the small gap(5 mm)of magnetic structure and vacuum environment,a small three-dimensional Hall probe has been *** angular and positional misalignment errors of the Hall sensors play an important role in the measurement accuracy of the *** order to minimize the misalignment errors,a method of calibrating angle error and relative assembly displacements of a three-dimensional Hall probe is carried *** The angle error of Hall sensors will be calibrated by a standard dipole magnet and a five-dimensional Hall *** standard dipole magnet will generate a single direction and uniform magnetic *** the fivedimensional Hall bench is used to rotate the Hall probe which is put in the center of *** on the relationship between angle and magnetic field strength,the angle error of each Hall sensor will be *** relative position between the sensitive areas of the Hall sensors will be calibrated by a two-dimensional magnetic field undulator *** on Maxwell’s equations,through the calculation of measurement magnetic field strength,the relative assembly displacements of the three Hall sensors can be *** The details of the calibration methods and the data processing of angle error and relative assembly displacements of a three-dimensional Hall probe are *** three-dimensional magnetic fields of a cryogenic permanent magnet undulator can be received accurately by correcting these angle errors and position errors of Hall *** This paper illustrates the relative position and angle calibration procedures and the data processing of a three-dimensional Hall *** the design of a smaller Hall probe is in *** calibration of the angle errors and position errors will be carried out

关键词： Magnetic measurement system Cryogenic permanent magnet undulator Three-dimensional Hall probe Calibration of Hall probe

Influence of cryogenic permanent magnet undulator motion error on magnetic field error and radiation intensity loss

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Radiation Detection Technology and Methods 2018年第1期2卷 200-206页

作者： Shu-Chen sun Wei-Fan Sheng Hui-Hua Lu Xiao-Yu Li Shu-Tao Zhao Ling-Ling Gong Wan Chen Zhi-Qiang Li Lei Zhang Yu-Feng yang Xiang-Zhen Zhang ya-jun sun Laboratory of Particle Acceleration Physics&Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Science Beijing 100049China

A cryogenic permanent magnet undulator prototype designed for Chinese High Energy Photon Source Test Facility(HEPSTF)at Institute of High Energy Physics is constructed and now *** precision of girders is a significant parameter to guarantee gap error so as to avoid phase error and radiation intensity *** order to study and minimize girder parallelism errors,RADIA and SPECTRA are used to calculate qualified motion *** Modules and single motor closed-loop feedback are designed to compensate the *** field is finally tuned to reach *** of the study and analysis will be presented in this paper.

关键词： Motion precision test Cryogenic permanent magnet undulator Phase error Radiation intensity

Magnetic field strength and temperature-dependent calibration system of Hall probe for the HEPS-TF cryogenic permanent magnet undulator

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Radiation Detection Technology and Methods 2018年第1期2卷 128-135页

作者： Ling-Ling Gong Wan Chen Wen Kang Lei Zhang Xiang-Zhen Zhang Shu-Chen sun Fu-San Chen Lei Wu ya-jun sun Zhi-Qiang Li Yu-Feng yang Hui-Hua Lu Xiao-Yu Li Shu-Tao Zhao Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China China Spallation Neutron Source(CSNS) Institute of High Energy Physics(IHEP)Chinese Academy of Sciences(CAS)Dongguan 523803China Dongguan Institute of Neutron Science(DINS) Dongguan 523808China

Purpose High energy photon source test facility(HEPS-TF)has manufactured a three-dimensional Hall probe to measure the cryogenic permanent magnet undulator(CPMU).Since the operating environment of the CPMU is the subcooled liquid nitrogen(85K),the temperature of the Hall probe will have a decrease of several degrees while carrying out the local magnetic *** established a magnetic field strength and temperature-dependent calibration system to calibrate the Hall *** The magnetic field strength of the Hall probe was calibrated by a standard dipole electromagnet and a nuclear magnetic resonance Tesla meter(NMR).The temperature of Hall probe was controlled by a control system which can modulate temperature from 0℃ to 30℃.Results A new homemade Hall probe has finished the temperature-dependent(0℃ to 30℃),magnetic field strength(-1.2 to 1.2 T)and angle error calibration at this new calibration *** temperature correction error is less than 0.045%.The calibration error of magnetic field strength is less than 1.5 *** RMS calibration error of Hall sensors angle matrix is less than *** The magnetic field strength and temperature-dependent calibration system including a standard dipole electromagnet,a temperature regulation system,an NMR and a five-dimensional Hall bench was *** detailed magnetic field strength and temperature-dependent calibration system is introduced and the results of the calibrations are presented.

关键词： Temperature calibration Cryogenic permanent magnet undulator Three-dimensional Hall probe Nuclear magnetic resonance Tesla meter

Superconducting multipole wiggler with large magnetic gap for HEPS-TF

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Nuclear Science and Techniques 2022年第2期33卷 21-29页

作者： Xian-Jing sun Fu-San Chen Xiang-Chen yang Wan Chen Xiao-Juan Bian Min-Xian Li Rui Ge Miao-Fu Xu yao Gao Jin-Can Wang Hui-Hua Lu Jian-She Cao Zhi-Qiang Li Zhuo Zhang Rui Ye Xiang-Zhen Zhang Shuai Li Bao-Gui Yin Mei yang Ling-Ling Gong Da-Heng Ji Lin Bian Ran Liang ya-jun sun Hong Shi Institute of High Energy Physics Chinese Academy of SciencesBeijing 10049China Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China China Spallation Neutron Source Institute of High Energy PhysicsChinese Academy of SciencesDongguan 523803China

A 16-pole superconducting multipole wiggler with a large gap of 68 mm was designed and fabricated to serve as a multipole wiggler for *** wiggler consists of 16 pairs of NbTi superconducting coils with a period length of 170 mm,and its maximum peak field is 2.6 *** magnet design,magnet poles were ***,the Lorentz force on the coils and electromagnetic force between the upper and lower halves were computed and analyzed along with the stored energy and inductance at different *** enhance the critical current of the magnet coil,all the pole coils selected for the magnet exhibited excellent performance,and appropriate prestress derived from the coil force analysis was applied to the pole coils during magnet *** entire magnet structure was immersed in 4.2-K liquid helium in the cryostat cooled solely by four two-stage cryocoolers,and the performance test of the superconducting wiggler was appropriately *** on the measured results,the first and second field integrals on the axis of the superconducting wiggler were significantly improved at different field levels after the compensation of the corrector ***,the wiggler was successfully installed in the storage ring of BEPCII operation with beams.

关键词： Superconducting multipole wiggler Force analysis Quench protection Magnetic field measurement HEPS-TF Cryostat

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Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong sun Wenwen Guan Cailing Chen Chao Wu Xiaoling Liu Biao Meng Tao Chen Yu Han jun Wang Shibo Xi Yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Single atom catalyst Synergy effect Carbon catalyst Electrocatalysis

Targets capture by distributed active swarms via bio-inspired reinforcement learning

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 210-221页

作者： Kun Xu Yue Li jun sun Shuyuan Du Xinpeng Di Yuguang yang Bo Li Institute of Biomechanics and Medical Engineering Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua University Institute of Nuclear and New Energy Technology Tsinghua University Shanghai Aerospace Control Technology Institute Shanghai Key Laboratory of Aerospace Intelligent Control Technology College of Automation Engineering Nanjing University of Aeronautics and Astronautics

Natural swarms arranged from cells to herds are usually decentralized but display intriguing collective intelligence in coordinating individuals across large scales to efficiently achieve their common goals. Learning from nature may provide new strategies for controlling collective dynamics of synthetic swarms to accomplish specific functions. Here, we present a bioinspired computational framework that steers distributed active swarms to collectively capture and merge targets via reinforcement learning. We exploit collective milling structures of natural herds to cage the targets, and adopt a switching control policy inspired by sperms' chiral dynamics to optimize the trajectories of individuals, through which the active swarms can selforganize to enclose single or multiple distant targets in a dynamical, adaptive and scalable manner. There exists a critical swarm size, beyond which the excessive competition between agents would generate large mechanical forces, leading to capture instability but enabling the transition from short-distance to long-distance merging capture of multiple targets. This work provides physical insights into distributed active swarms and could offer a multilevel, decentralized strategy toward controlling swarm robotics in wide applications such as bio-medical devices, machine immunity, and target clearance.

关键词： swarm intelligence robotics multi-tasks artificial intelligence bionics