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SSRN 2023年

作者： Cai, Chengxin Li, Yinfei Zhou, Yangyang Li, Mingxing Qin, Yao Shao, Weiheng Fang, Wenxiao Chen, Yiqiang Ministry of Education Zhengzhou450001 China Henan Key Laboratory of Grain Photoelectric Detection and Control Henan University of Technology Zhengzhou450001 China College of Information Science and Engineering Henan University of Technology Zhengzhou450001 China China Electronic Produce Reliability and Environmental Testing Research Institute Guangzhou510610 China

Integration of diversified functionalities into a single, planar, and ultra-compact metasurface has demonstrated promising prospects for comprehensive implementations in compact 5G/6G communication systems to improve the capacity and performance. Increasingly emerged multifunctional metasurfaces have successfully revealed integrated wavefront manipulations based on phase, polarization transmission/ reflection and coding apertures, etc. However, multifunctional metasurfaces with more composite channels in terms of multiple operation frequencies, low crosstalk, high-efficient and computable array factors are still in dire demand. In this work, we design and demonstrate a multifunctional metasurface integrated by phase and amplitude simultaneous coding cells at dual frequencies. By changing the polarization of electromagnetic (EM) waves, the wavefronts of the reflected waves can be reshaped at dual frequencies. The coding metasurface exhibits the strong capability to manipulate both the x linearly polarized wave and y linearly polarized wave base on phase and amplitude coding at dual frequencies. Therefore, the designed multifunctional metasurface can achieve distinct functionalities including anomalous reflection, reflection imaging, and vortex wave beam generation. Both theorical analysis and full wave simulation demonstrate the predicted functionalities of the designed devices, which can advance research and applications related to other distinct functionalities of integrated communication system. © 2023, The Authors. All rights reserved.

关键词： Vortex flow

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Ultrathin-shell epitaxial Ag@Au core-shell nanowires for high-performance and chemically-stable electronic, optical, and mechanical devices

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Nano Research 2021年第11期14卷 4294-4303页

作者： Yangzhi Zhu Sanggon Kim Xuezhi Ma Peter Byrley Ning Yu Qiushi Liu Xiaoming Sun Da Xu Sangshan Peng Martin C.Hartel Shiming Zhang Vadim Jucaud Mehmet R.Dokmeci Ali Khademhosseini Ruoxue Yan Department of Chemical and Environmental Engineering Bourns College of EngineeringUniversity of California-RiversideRiversideCA92521USA Terasaki Institute for Biomedical Innovation Los AngelesCA90064USA Department of Electrical and Computer Engineering University of California-RiversideRiversideCA92521USA State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha410082China Department of Bioengineering University of California-Los AngelesLos AngelesCA90095USA Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina Material Science and Engineering Program University of California-RiversideRiversideCA92521USA

Silver nanowires (AgNWs) hold great promise for applications in wearable electronics, flexible solar cells, chemical and biological sensors, photonic/plasmonic circuits, and scanning probe microscopy (SPM) due to their unique plasmonic, mechanical, and electronic properties. However, the lifetime, reliability, and operating conditions of AgNW-based devices are significantly restricted by their poor chemical stability, limiting their commercial potentials. Therefore, it is crucial to create a reliable oxidation barrier on AgNWs that provides long-term chemical stability to various optical, electrical, and mechanical devices while maintaining their high performance. Here we report a room-temperature solution-phase approach to grow an ultra-thin, epitaxial gold coating on AgNWs to effectively shield the Ag surface from environmental oxidation. The Ag@Au core-shell nanowires (Ag@Au NWs) remain stable in air for over six months, under elevated temperature and humidity (80 °C and 100% humidity) for twelve weeks, in physiological buffer solutions for three weeks, and can survive overnight treatment of an oxidative solution (2% H2O2). The Ag@Au core-shell NWs demonstrated comparable performance as pristine AgNWs in various electronic, optical, and mechanical devices, such as transparent mesh electrodes, surface-enhanced Raman spectroscopy (SERS) substrates, plasmonic waveguides, plasmonic nanofocusing probes, and high-aspect-ratio, high-resolution atomic force microscopy (AFM) probes. These Au@Ag core-shell NWs offer a universal solution towards chemically-stable AgNW-based devices without compromising material property or device performance.

关键词： epitaxial growth core-shell nanowire plasmonic waveguides atomic force microscopy(AFM)probe transparent electrode wearable electronics

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A safe and high-precision detection method for hydrogen leakage analysis of underground gas storage based on stimulated Raman spectroscopy of micro-nanofiber

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Fuel 2025年 400卷

作者： Zou, Xianjian Jiang, Shoulin Luo, Zixue Wang, Tongtao Chen, Feifan Ju, Jian Lin, Shaoqun Jin, Wei Yin, Jianhua Yang, Chunhe State Key Laboratory of Geo-mechanics and Geotechnical Engineering Safety Institute of Rock and Soil Mechanics Chinese Academy of Sciences Hubei Wuhan430071 China Department of Electrical and Electronic Engineering The Hong Kong Polytechnic University Hong Kong China State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Hubei Wuhan430074 China Photonics Research Center The Hong Kong Polytechnic University Shenzhen Research Institute Guangdong Shenzhen518057 China ElePhoton Technology Co. Ltd Dongguan China Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hong Kong Hubei Key Laboratory of Geo-Environmental Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan430071 China

Real-time monitoring technology for hydrogen leakage and diffusion is crucial for ensuring safety in large-scale geological hydrogen storage. Addressing challenges such as the easy diffusion and penetration of small molecular gases like hydrogen and the complexities of high-precision detection, a hydrogen leakage detection method is selected based on the stimulated Raman spectroscopy of micro-nanofibers for use in underground salt cavern hydrogen storage. A multi-point laser hydrogen sensing system was developed capable of high-precision real-time monitoring and analysis of minute hydrogen leaks. The system's hydrogen noise equivalent detection limit stands at approximately 122 ppm, with sensor sensitivity surpassing 200 ppm, enabling detection even at hydrogen concentrations as low as 0.1 %. The probe exhibits robust vibration resistance. Through both indoor and outdoor engineering application simulation tests, hydrogen leakage monitoring simulation for underground hydrogen storage was completed. These tests confirmed the feasibility and reliability of the system and validated an intrinsically safe hydrogen measurement scheme using optical fiber sensing integration. Furthermore, the system can measure hydrogen across its full concentration range with outstanding recovery and rapid second responses speed. It exhibits no zero drift and is selective, responding solely to hydrogen and not to other common interfering gases such as carbon monoxide. This selectivity helps reduce false alarms. With an expected service life exceeding 30 years for the photoelectric host, the system ensures the long-term safety and efficiency of underground hydrogen storage operations. © 2025 Elsevier Ltd

关键词： Leak detection

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High-Efficiency Capture of Ammonia Using Hierarchically Porous Zr-Mof Nanoarchitectures Under Ambient Conditions: Thermodynamics, Kinetics, and Mechanisms

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SSRN 2022年

作者： Wang, Xinbo Liu, Zhilu Li, Ganggang Jiang, Guoxia Zhao, Yue Li, Li Li, Kai Liang, Guojie Gao, Song Xi, Hailing Li, Song Zou, Ruqiang State Key Laboratory of NBC Protection for Civilian Research Institute of Chemical Defense Beijing100191 China State Key Laboratory of Coal Combustion School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan430074 China National Engineering Laboratory for VOCs pollution Control Material & Technology Research Center for Environmental Material and Pollution Control Technology University of Chinese Academy of Sciences Beijing101408 China Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials School of Materials Science and Engineering Institute of Clean Energy Peking University Beijing100871 China

Zirconium-based metal–organic frameworks (Zr-MOFs) have emerged as a promising candidate for efficiently eliminating toxic chemicals under ambient conditions. Herein, we demonstrate the remarkable ammonia capture capabilities of the hierarchically porous MOF-808 xerogel (G808) macrostructure and its amino-functionalized analogue (G808-NH2), which were constructed through a sol–gel-based strategy combined with convenient ambient pressure drying. Static isotherm measurements and dynamic breakthrough tests using engineered Zr-MOF xerogel granules were conducted to illuminate the thermodynamic and kinetic characteristics for ammonia sorption. The G808 and G808-NH2 xerogels manifest substantially higher ammonia uptake, intensified interfacial interactions, and enhanced irreversible retention toward ammonia compared with the state-of-the-art activated carbon-based materials, particularly at the low-concentration region. Moreover, these hierarchical Zr-MOF nanoarchitectures exhibit extraordinary ammonia removal performance as well as excellent environmental robustness under simulated respirator canister/protection filter circumstances, with the breakthrough capacities of G808-NH2 being individually more than two and one orders of magnitude greater than those for the pristine and metal-amine impregnated carbons. The kinetic ammonia adsorption behaviors can be well delineated by the pseudo-first-order Wheeler-Jonas model. An in-depth discussion on the ammonia sorption regime, detailing five binding patterns besides reversible physisorption with a special focus on the impacts of polar amino groups and humidity, was proposed based on multiple characterizations and Grand Canonical Monte Carlo simulation. © 2022, The Authors. All rights reserved.

关键词： Ammonia

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Belief reliability Modeling and Analysis for the Three-Grid Ion Thruster

Belief Reliability Modeling and Analysis for the Three-Grid ...

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International Conference on System reliability and science (ICSRS)

作者： Shi-Shun Chen Xiao-Yang Li Bo-Yuan Li Jing Li School of Reliability and Systems Engineering Beihang University Beijing China Science and Technology on Reliability and Environmental Engineering Laboratory Beihang University Beijing China National Key Laboratory of Vacuum and Cryogenic Technology on Physics Lanzhou Institute of Physics Lanzhou China

ISBN: (纸本)9781665400503

The ion thruster is one of the most widely used electric propulsion thrusters, and its failure can directly affect the success of deep-space exploration missions. Therefore, the ion thruster is always required with extremely high reliability. However, few researchers thoroughly analyze the influence of internal and external parameters on reliability, which makes it difficult to provide guidance for reliability improvement. In this paper, based on reliability science principles, a reliability model considering performance degradation and multi-source uncertainties is established for three-grid ion thrusters. Firstly, the electron back streaming limit (EBL) is determined as the key performance parameter based on functional principles and the performance margin model is constructed. Then, the degradation model considering sputter erosion is established through simulation and response surface methodology (RSM). Furtherly, we analyze the sources of uncertainties and quantify uncertainties with probability distributions. Finally, the reliability model is established. A case study of a xenon ion thruster is conducted to perform reliability and sensitivity analysis. The results show that the proposed model can quantify reliability by given internal and external parameters and provide guidance for the designers to meet high reliability requirements.

关键词： Degradation Uncertainty Attitude control Sensitivity analysis Xenon Apertures Ions

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Development of reference material for the detection of rat ingredient in meat by quantitative real-time PCR

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Food Bioscience 2023年第3期53卷 3148-3153页

作者： Chao Ji Yihan He Xiangfu Xu Jinxin Liu Wei Liu Xingyu Wang Liangjuan Zhao Wenjie Zheng Xiaonan Lu Laboratory for Quality Control and Traceability of Food and Agricultural Products Tianjin Normal UniversityTianjin300387China Department of Food Science and Agricultural Chemistry Faculty of Agricultural and Environmental SciencesMcGill UniversitySainte-Anne-de-BellevueQuebecH9X 3V9Canada The Industry Product Inspection Center of Tianjin Customs Tianjin 300387China The Animal Plant&Foodstuff Inspection Center of Tianjin CustomsTianjin 300387China State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan National Engineering Research Center for Applied Technology of Agricultural BiodiversityCollege of Plant ProtectionYunnan Agricultural UniversityKunmingYunnan650201China Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of EducationSouthwest Landscape Architecture Engineering Research Center of National Forestry and Grassland AdministrationSouthwest Forestry UniversityKunmingYunnan650224China

A reference material(RM)for the determination of rat ingredient in meat was developed in the current *** muscle tissues of thorax and leg of rat with fascia removed were used as the fundamental material,followed by freezing,slicing,drying,and grinding to obtain the meat *** was selected as the representative meat matrix and the developed RM was 1%w/w rat meat in cod *** reliability of the raw material to develop RM was firstly confirmed by quantitative real-time *** RM was homogeneous and showed good stability during both long-term storage at 4℃and short-term simulated transportation condition in the range of-20℃-45℃.Characterization of this RM was conducted in eight collaborative *** characterized CT value of RM was 20.14 with an uncertainty of 1.26(k=2,where k is the coverage factor).This RM can be used for method validation and quality control to determine rat ingredient in meat products.

关键词： Food authentication Food fraud Reference material Characterization

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A Dual-head Prompt Gamma Imaging System for Online Monitoring in Proton Therapy

A Dual-head Prompt Gamma Imaging System for Online Monitorin...

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IEEE Symposium on Nuclear science (NSS/MIC)

作者： Hongyang Zhang Bo Zhao Peng Fan Shi Wang Wenzhuo Lu Zhaoxia Wu Tianyu Ma Yaqiang Liu Department of Engineering Physics Ministry of Education Tsinghua University Key Laboratory of Particle & Radiation Imaging (Tsinghua University) Beijing China Department of Engineering Physics Tsinghua University Beijing China Beijing Institute of Spacecraft Environment Engineering China Academy of Space Technology and Science and Technology on Reliability and Environmental Engineering Laboratory Beijing Institute of Spacecraft Environment Engineering Beijing China

Proton therapy is one of the most advanced radiotherapy technologies. However, due to range uncertainty, real-time monitoring of proton dose deposition is of great importance in proton therapy.A dual-head prompt gamma imaging system has been proposed in previous work. The system design provides high spatial resolution and ensures enough detection efficiency for high signal-to-noise imaging during pencil beam scanning. In this work, the dual-head imaging system is assembled and calibrated. Detectability of range shift and range deviation accuracy are evaluated under 60 and 100 MeV proton beam. Detection efficiency (at the center of the FOV) and spatial resolution of the dual-head system are given by point source *** shift of 1 mm is able to be distinguished by the vertical detector by locating the most distal edge position (MDEP) of prompt gamma profile. Proton range deviation and range deviation accuracy of the vertical detector are both less than 1 mm at typical count level of a single spot in pencil beam scanning. Detection efficiency of the dual-head imaging system is 0.62% (FOV center) and ≤3 mm spatial resolution is achieved in the whole *** dual-head prompt gamma imaging system shows excellent performance in detection efficiency and spatial resolution. Proton range shift detectability of the system is preliminarily verified. The system should be tested under clinical proton beam setup in future work.

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A Systematic Review of Multi-Sensor Information Fusion for Equipment Fault Diagnosis

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IEEE Transactions on Instrumentation and Measurement 2025年

作者： Lin, Tantao Ren, Zhijun Zhu, Linbo Zhu, Yongsheng Feng, Ke Ding, Weiping Yan, Ke Beer, Michael Xi'an Jiaotong University Key Laboratory of Education Ministry for Modern Design & Rotor-Bearing System Xi'an710049 China Xi'an Jiaotong University Frontier Institute of Science and Technology Xi'an710049 China Xi'an Jiaotong University School of School of Chemical Engineering and Technology Xi'an710049 China Xi'an Jiaotong University School of Mechanical Engineering Xi'an710049 China Nantong University School of Artificial Intelligence and Computer Science Nantong226019 China City University of Macau Faculty of Data Science Macau999078 China Leibniz University Institute for Risk and Reliability Hannover30167 Germany University of Liverpool Department of Civil and Environmental Engineering LiverpoolL69 3BX United Kingdom Tongji University International Joint Research Center for Resilient Infrastructure International Joint Research Center for Engineering Reliability and Stochastic Mechanics Shanghai200092 China

In contrast to fault diagnosis relying solely on a single sensor, the method of multi-sensor information fusion for fault diagnosis (MSIFFD) broadens the spectrum of available information sources. It is renowned for its high accuracy and reliability, traits that have attracted growing attention within the research community and led to the generation of a substantial body of publications. However, there is currently a lack of a comprehensive and systematic review in this domain. Thereby, this review aims to thoroughly explore all research achievements in the field of MSIFFD. At the outset, an analysis is undertaken to delineate the fusion level of multi-sensor information, with a specific focus on its location and types of inputs and outputs within the information flow. Subsequently, an examination of the six primary fundamental operations for amalgamating multi-sensor information is undertaken to clarify the motivations and processes involved in information fusion across various operations. Following this, factors influencing fusion diagnostics and strategies aimed at improving their performance are examined to explore approaches for enhancing fusion accuracy. The subsequent sections delve into the analysis of sensor types and application scenarios, providing a reference guide for practical applications. Finally, this review outlines potential future challenges in the field of MSIFFD and provides a range of recommendations and possible solutions for consideration. © 1963-2012 IEEE.

关键词： Information fusion

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MF-MOS: A Motion-Focused Model for Moving Object Segmentation

MF-MOS: A Motion-Focused Model for Moving Object Segmentatio...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Jintao Cheng Kang Zeng Zhuoxu Huang Xiaoyu Tang Jin Wu Chengxi Zhang Xieyuanli Chen Rui Fan School of Electronic and Information Engineering South China Normal University Foshan China Department of Computer Science Aberystwyth University Aberystwyth U.K. Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong China School of Internet of Things Engineering Jiangnan University Wuxi China College of Intelligence Science and Technology National University of Defense Technology Changsha China College of Electronics & Information Engineering Shanghai Research Institute for Intelligent Autonomous Systems the State Key Laboratory of Intelligent Autonomous Systems and Frontiers Science Center for Intelligent Autonomous Systems Tongji University Shanghai China

ISBN: (数字)9798350384574

ISBN: (纸本)9798350384581

Moving object segmentation (MOS) provides a reliable solution for detecting traffic participants and thus is of great interest in the autonomous driving field. Dynamic capture is always critical in the MOS problem. Previous methods capture motion features from the range images directly. Differently, we argue that the residual maps provide greater potential for motion information, while range images contain rich semantic guidance. Based on this intuition, we propose MF-MOS, a novel motion-focused model with a dual-branch structure for LiDAR moving object segmentation. Novelly, we decouple the spatial-temporal information by capturing the motion from residual maps and generating semantic features from range images, which are used as movable object guidance for the motion branch. Our straightforward yet distinctive solution can make the most use of both range images and residual maps, thus greatly improving the performance of the LiDAR-based MOS task. Remarkably, our MF-MOS achieved a leading IoU of 76.7% on the MOS leaderboard of the SemanticKITTI dataset upon submission, demonstrating the current state-of-the-art performance. The implementation of our MF-MOS has been released at https://***/SCNU-RISLAB/MF-MOS.

关键词： Laser radar Semantics Dynamics Object segmentation Data augmentation Data models reliability

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Covalent "Bridge-Crosslinking" Strategy Constructs Facilitated Transport Mixed Matrix Membranes for Highly-Efficient Co2 Separation

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SSRN 2023年

作者： Li, Boyu Liu, Jiaxiang He, Xuanting Wang, Rong Tao, Wenquan Li, Zhuo State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Defense Innovation Institute Academy of Military Sciences Beijing100071 China

Facilitated transport mixed matrix membranes (FTMMMs) separation technology has shown advantages in improving CO2 recycling efficiency and reducing the environmental impacts associated with carbon emission. The design of FTMMMs is highly dependent on the selection of a compatible combination of polymer and filler. Herein, a novel grafted nanoparticles (GNPs) filler UiO-66-NM@PEG with multiple groups prone to hydrogen bond was designed to alleviate the phase separation and performance degradation caused by filler/polymer poor compatibility. In the GNPs configuration, by employing the coexistence strategy of coupling reaction and covalent bonds, maleic anhydride (MAH) was coupled with the amino group on UiO-66-NH2 without clogging or cracking, and the generated carboxyl groups can be cross-linked with the hydroxyl groups on the poly (ethylene glycol) (PEG) by covalent bonds. The UiO-66-NM@PEGdemonstrated excellent interface compatibility between the filler and matrix phase of UiO-66-NM@PEG/PVDF, which was further convinced by molecular modelling. The resultant UiO-66-NM@PEG/PVDF achieved a simultaneous enhancement of gas permeability (537.6 Barrer) and ideal CO2/N2 selectivity (47.8), which surpassed Robenson upper bound. Moreover, the UiO-66-NM@PEG/PVDF has a lasting sustainability over 960 hours (40 days), and a valid anti-acid/alkali corrosion resistance in harsh environments. More importantly, UiO-66-NM@PEG can also be well mixed with other mixture matrices such as PDMS and PEBAX to promote permeability/ideal selectivity up to (724.1 Barrer/21.1) and (307.4 Barrer/31.4). We thus concluded that this rational-design GNPs approach provides a general toolbox for controllable engineering in GNPs whereby enhanced favorable filler/matrix compatibility in FTMMMs with optimized CO2/N2 separation properties. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

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