A5112710424- Mass Spectrometry Techniques and Applications
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Chromatography
- Coastal wetland ecosystem dynamics
- Electric Motor Design and Analysis
- Adaptive Control of Nonlinear Systems
- Microfluidic and Capillary Electrophoresis Applications
- Superconducting Materials and Applications
- Space Satellite Systems and Control
- Peatlands and Wetlands Ecology
- Spectroscopy and Laser Applications
- Constructed Wetlands for Wastewater Treatment
- Atomic and Molecular Physics
- Physics of Superconductivity and Magnetism
- Magnetic Properties of Alloys
- Rangeland Management and Livestock Ecology
- Robotic Path Planning Algorithms
- Advanced Vision and Imaging
- X-ray Spectroscopy and Fluorescence Analysis
- Particle accelerators and beam dynamics
- Robotics and Sensor-Based Localization
- Climate change impacts on agriculture
- Magnetic Bearings and Levitation Dynamics
- Magnetic Properties and Applications
- Video Coding and Compression Technologies
Chinese Academy of Sciences
2016-2025
Nanjing Medical University
2025
Institute of Electrical Engineering
2023-2025
University of Chinese Academy of Sciences
2016-2022
Land Consolidation and Rehabilitation Center
2022
Ministry of Natural Resources
2022
Changchun Institute of Optics, Fine Mechanics and Physics
2021-2022
Institute of Geographic Sciences and Natural Resources Research
2021
Northwest Normal University
2021
Institute of Modern Physics
2021
The mass spectrometry analysis of oxygenated volatile organic compounds (OVOCs) remains challenging due to their limited ionization efficiencies. In this study, we surprisingly found that, under vacuum-UV (VUV) excitation, a gaseous mixture CH2Cl2/H2O/analyte in N2 buffer generated large amounts H3O+ and protonated analyte even when the photon energy was lower than neutral species involved. contrast those obtained with VUV photoionization alone, signal intensities organics can be amplified...
Abstract Charge exchange between highly charged ions and neutral atoms molecules has been considered as one of the important mechanisms controlling soft X-ray emissions in many astrophysical objects environments. However, for modeling charge emission, data n- l -resolved state-selective capture cross sections are often obtained by empirical semiclassical theory calculations. With a newly built cold target recoil-ion momentum spectroscopy (COLTRIMS) apparatus, we perform series measurements...
Chlorinated coumarins, which are as cytotoxic highly toxic halobenzoquinones toward CHO-K1 cells, have recently been identified disinfection byproducts in drinking water processes. Therefore, detecting coumarins samples collected at various stages from treatment plants helps assess the formation of chlorinated water. Hence, a simple, rapid, accurate, and sensitive method for quantifying is required. In this study, was developed based on solid-phase extraction coupled with high performance...
A Conduction cooled superconducting magnet (SM) for human magnetic resonance imaging, made of Nb3Sn coils, has been designed. The features a warm bore with diameter 850 mm and central field strength 7 T. size positioning bundle seven epoxy-impregnated coils were determined using both linear nonlinear optimization methods. These methods ensured that the achieved uniformity 10 ppm within 400 spherical volume (DSV). was designed to operate at current 250 in cryogenic system, its temperature...
Abstract Doping has been used to enhance the ionization efficiency of analytes in atmospheric pressure photoionization, which is based on charge exchange. Compounds with excellent efficiencies are usually chosen as dopants. In this paper, we report a new phenomenon observed low-pressure photoionization: Protonation enhancement by dichloromethane (CH 2 Cl ) doping. CH not common dopant due its high energy (11.33 eV). The photoionization source was built using krypton VUV lamp that emits...
This paper presents a real-time path planning approach for controlling the motion of space-based robots. The algorithm can plan three-dimensional trajectories agents in complex environment which includes numerous static and dynamic obstacles, constraints, and/or performance constraints. is extended based on window (DWA). As classic reactive method obstacle avoidance, DWA uses an optimized function to select best command. original optimization consists three weight terms. Changing weights...
In view of the importance workspace to robotic configuration optimization, motion planning and control. This paper presents an improved Monte Carlo method Voxel Algorithm analyse a 9-DOF hyper-redundant manipulator. By considering problem that traditional is not accurate enough when calculating robot, proposed. First, seed generated by method, then expanded based on normal distribution with standard deviation dynamically adjustable. setting precision threshold during extension process,...
Plant residue decomposition can significantly affect the water environment of wetland ecosystems. However, little is known about trajectory and key drivers different initial mass (IMR) that regulate quality. Here, we conducted a study 210 days with an in situ experiment to examine impact change IMR parameters Phragmites australis on quality growing season 2019 Baiyangdian North China. Five were applied, ranging from 0 1000 g 250 increments. The chemical oxygen demand (COD_W), total organic...
Doping has been used to enhance the ionization efficiency of analytes in atmospheric pressure photoionization, which is based on charge exchange. Compounds with excellent efficiencies are usually chosen as dopants. In this paper, we report a new phenomenon observed low-pressure photoionization: Protonation enhancement by dichloromethane (CH2Cl2) doping. CH2Cl2 not common dopant due its high energy (11.33 eV). The photoionization source was built using krypton VUV lamp that emits photons...
摘要: 该文基于盲源分离的思想，针对由单传感器声纳浮标组成的声纳浮标场，在窄带背景下提出了一种新的声纳浮标场多目标定位算法。仿真实验结果表明，在很好地恢复了目标信号波形的同时，该算法能准确地估计出目标的位置。 关键词: 声纳浮标场; 盲分离; 多目标定位
The magnetic suspension system is an important component of the superconducting magnet system, playing a supporting role for key components - and cryogenic shield in strong fields ultra-low temperature environments. new adjustable composed 8 sets three-dimensional rod components, which can not only withstand tensile forces but also adjust coaxiality magnet. In addition, innovatively integrate sensors detecting tension rods, then analyze mechanical strength natural frequency through...
The robotics servicing on-orbit especially for assembly on orbit will play significant role in future space task. This paper presents a small docking mechanism (DM) with applications to telescopes. detail design of DM is introduced and safety, the main components are analyzed by limit finite element method (FEM). In order realize process, visual capturing based object identification technology studied. Finally, experiment performed test results demonstrate that system can successfully docking.