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A slippery hydrogel coating with durable oil-repellent property and self-regeneration capacity

science China(Technological sciences) 2022年第8期65卷 1819-1827页

作者： XU Ting GAO ZhongShuai LI FangChao MIAO Gan JIA YuYu MIAO Xiao ZHU XiaoTao LU JingWei WANG Bo SONG YuanMing REN GuiNa LI XiangMing School of Environmental and Material Engineering Yantai UniversityYantai 264405China Shandong Key Laboratory of Optical Communication Science and Technology School of Physics Science and Information TechnologyLiaocheng UniversityLiaocheng 252000China

Traditional lubricant impregnated surfaces usually required fluorinated lubricants to achieve slippery oil repellency, but the lubricants infused were expensive and toxic and also suffered from limited stability because of their migrating, evaporating, and leaking during use. Herein, to address this issue, we fabricated a durably fluorine-free slippery oil-repellent hydrogel coating using water as the lubricant. Due to its enhanced water-binding affinity, water could wet the hydrogel completely and form a hydrated-water layer on the surface. The hydrated water layer could act as a lubricant to repel foreign oils, which allowed the hydrogel to display slippery oil-repellency in air, exhibit superoleophobicity underwater, and resist oil fouling upon oil *** hydrogel kept its oil-repellent properties after mechanical tests as well as thermal and freezing treatments,demonstrating its durability. Thanks to its moisture absorption, the water lubricant layer could self-regenerate upon the lubricated water layer depletion through exposure to a humid environment. Exploiting it is water-attracting and oil repellency, the hydrogel coating was demonstrated as a versatile platform for oil/water separation, polymer/water separation, drag-reduction, and antifogging.

关键词： slippery oil repellency self-regeneration moisture absorbing oil/water separation

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Modeling the dynamic alignment of business and information systems via the lens of human-centered architecture evolution

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Journal of systems engineering and Electronics 2021年第4期32卷 881-888页

作者： ZHANG Mengmeng YI Shuanghui CHEN Honghui LUO Aimin LIU Junxian ZHANG Xiaoxue Science and Technology on Information Systems Engineering Laboratory National University of Defense TechnologyChangsha 410072China National Key Laboratory for Complex System Simulation Military Academy of SciencesBeijing 100080China

The complexity of business and information systems(IS)alignment is a growing concern for researchers and practitioners *** extant research on alignment architecture fails to consider the human viewpoint,which makes it difficult to embrace emergent *** paper contributes to the extant literature in the following ***,we combine an enterprise architecture(EA)framework with a human viewpoint to address alignment issues in the architecture design phase;second,we describe a dynamic alignment model by developing a humancentered meta-model that explains first-and second-order changes and their effects on alignment *** paper provides better support for the theoretical research and the practical application of dynamic alignment.

关键词： business and information systems(IS)alignment human viewpoint enterprise architecture(EA) meta-model dynamic alignment

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Design of fog transmission lens with large continuous zoom range

Design of fog transmission lens with large continuous zoom r...

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2024 Conference on Spectral technology and Applications, CSTA 2024

作者： Huang, Muwang Zhang, Jiazhan Chen, Enguo College of Optical Science and Engineering Zhejiang University China Foctek Photonics Inc. Fujian Fuzhou China National & Local United Engineering Laboratory of Flat Panel Display Technology College of Physics and Information Engineering Fuzhou University China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fujian Fuzhou China

ISBN: (纸本)9781510683082

In order to meet the needs of large-scale and long-distance monitoring, a 50 mm～750 mm fog transmission zoom lens is presented in this paper. The lens adopts a mechanical compensation zoom structure, and an ultra-low dispersion lens is used to correct the issue of large secondary spectrum at the telephoto end. The image quality of the lens is optimized by adjusting the initial structure and using the optimization operand. After optimization, the entire system consists of 18 spherical lenses with a total length of less than 360 mm. Design results show that MTF is close to the diffraction limit (MTF>0.2) under the condition of 130 lp/mm, and the RMS spot radius is less than 5 μm under the condition of the central field of view. The field curvature is less than 0.1 mm, and the distortion is less than 1%. The movement curve of the zoom group and the compensation group is drawn, and the curve is smooth without breakpoints. The system meets the actual application requirements of large-scale and long-distance fog monitoring scenarios, and has certain reference significance for the design of a large zoom optical system. © 2024 SPIE.

关键词： Optical design

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Highly Sensitive Ammonia Gas Sensors at Room Temperature Based on the Catalytic Mechanism of N,C Coordinated Ni Single-Atom Active Center

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Nano-Micro Letters 2024年第12期16卷 515-531页

作者： Wenjing Quan Jia Shi Min Zeng Wen Lv Xiyu Chen Chao Fan Yongwei Zhang Zhou Liu Xiaolu Huang Jianhua Yang Nantao Hu Tao Wang Zhi Yang National Key Laboratory of Advanced Micro and Nano Manufacture Technology Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Department of Micro/Nano Electronics School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Shanghai Key Laboratory of Intelligent Sensing and Detection Technology School of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237People’s Republic of China

Significant challenges are posed by the limitations of gas sensing mechanisms for trace-level detection of ammonia(NH3).In this study,we propose to exploit single-atom catalytic activation and targeted adsorption properties to achieve highly sensitive and selective NH3 gas ***,Ni singleatom active sites based on N,C coordination(Ni-N-C)were interfacially confined on the surface of two-dimensional(2D)MXene nanosheets(Ni-N-C/Ti_(3)C_(2)Tx),and a fully flexible gas sensor(MNPE-Ni-N-C/Ti_(3)C_(2)Tx)was *** sensor demonstrates a remarkable response value to 5 ppm NH3(27.3%),excellent selectivity for NH3,and a low theoretical detection limit of 12.1 *** analysis by density functional calculation reveals that the Ni single-atom center with N,C coordination exhibits specific targeted adsorption properties for ***,its catalytic activation effect effectively reduces the Gibbs free energy of the sensing elemental reaction,while its electronic structure promotes the spill-over effect of reactive oxygen species at the gas-solid *** sensor has a dual-channel sensing mechanism of both chemical and electronic sensitization,which facilitates efficient electron transfer to the 2D MXene conductive network,resulting in the formation of the NH3 gas molecule sensing ***,the passivation of MXene edge defects by a conjugated hydrogen bond network enhances the long-term stability of MXene-based electrodes under high humidity *** work achieves highly sensitive room-temperature NH3 gas detection based on the catalytic mechanism of Ni single-atom active center with N,C coordination,which provides a novel gas sensing mechanism for room-temperature trace gas detection research.

关键词： Gas sensor Single atom Catalytic activation Targeted adsorption End-sealing passivation

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PREDICTION OF SENSOR DATA ACCURACY IN THERMAL EXPERIMENTAL BENCHES USING GRU-GCN NEURAL NETWORK MODEL 31

PREDICTION OF SENSOR DATA ACCURACY IN THERMAL EXPERIMENTAL B...

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2024 31st International Conference on Nuclear engineering, ICONE 2024

作者： Linjun, Yang Tong, Li Yongchao, Liu Bo, Wang Jiangkuan, Li Jiming, Wen Sichao, Tan Ruifeng, Tian Heilongjiang Provincial Key Laboratory of Nuclear Power System and Equipment College of Nuclear Science and Technology Harbin Engineering University Harbin150001 China Key Laboratory of Nuclear Safety and Advanced Nuclear Energy Technology School of Nuclear Science and Technology Harbin Engineering University Harbin150001 China

ISBN: (纸本)9780791888261

As a large-scale facility with multi-system coupling, the operation safety of nuclear power plant is of great importance to the environment and human society. Accurate monitoring of the overall operation status of nuclear power plants (NPP) is not only the key to ensure its safe operation, but also an important means to improve energy efficiency and reduce potential risks. In order to solve the problem of simultaneous prediction of multiple operating parameters of nuclear power plant, this study proposes a deep learning model combining Graph Convolution Network (GCN) and Gated Cycle Unit (GRU), which have the advantages of processing complex network data and time series data respectively. In order to verify the validity of the proposed model, a series of experiments are carried out on the thermal test-bed simulating the operation characteristics of nuclear power plants. The experimental results show that compared with the existing methods, GRU-GCN model has significantly improved the prediction accuracy. This result not only shows the potential of the deep learning model combining GCN and GRU in processing complex system data, but also provides a new idea for the safety monitoring and operation management of nuclear power plants in the future. © 2024 by ASME.

关键词： Nuclear power plants

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Anomalous heat transfer in nonequilibrium quantum systems

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Physical Review Research 2025年第1期7卷 L012044-L012044页

作者： Teng Ma Jing-Ning Zhang Yuan-Sheng Wang Hong-Yi Xie Man-Hong Yung Beijing Academy of Quantum Information Sciences Beijing 100193 China BGI Research Shenzhen 518083 China BGI Research Wuhan 430074 China School of Systems Science Beijing Normal University Beijing 100875 China Department of Physics and Astronomy Center for Quantum Research and Technology University of Oklahoma Norman Oklahoma 73069 USA Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China International Quantum Academy Shenzhen 518048 China Guangdong Provincial Key Laboratory of Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China Shenzhen Key Laboratory of Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China

Anomalous heat transfer (AHT), a process by which heat spontaneously flows from a cold system into a hot one, superficially contradicts the Clausius statement of the second law of thermodynamics. Here we provide a full classification of mechanisms of AHT in nonequilibrium quantum systems from a quantum-information perspective. For initial states in local equilibrium, we find that AHT can arise from three resources: initial correlation, intrasystem interaction, and intrasystem temperature inhomogeneity. In particular, for qubit systems, we prove that initial quantum coherence is necessary for AHT if the intersystem interactions are limited to the two-body type. We explicitly show AHT dominated by each of the mechanisms in a three-qubit system. Our classification scheme may offer a guideline for developing high-efficiency quantum autonomous thermal machines.

关键词： Qubits

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A Comparative Analysis of Joomla, Drupal, Wordpress and ***: Exploring Features, Performance, and Suitability

A Comparative Analysis of Joomla, Drupal, Wordpress and ***:...

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2023 IEEE Asia-Pacific Conference on Computer science and Data engineering, CSDE 2023

作者： Prasad, Ashwin Ashika Sharma, Neeraj Anand Kumar, Anal School of Science and Technology The University of Fiji Department of Computer Science and Mathematics Fiji College of Engineering Science and Technology Fiji National University Department of Computing Sciences and Information System Fiji

ISBN: (纸本)9798350341072

In the dynamic landscape of web development, the judicious choice of platform and structure plays a pivotal role. This comprehensive study conducts a thorough comparison of four prominent web development technologies: ***, Joomla, Drupal, and WordPress. With a primary focus on scrutinizing features, performance, and overall suitability, the research aims to provide valuable insights for developers, businesses, and decision-makers. By objectively evaluating the merits and limitations of each technology, this study seeks to empower stakeholders with essential knowledge, enabling them to make informed decisions at the onset of web development projects. © 2023 IEEE.

关键词： Decision making

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Five-level anti-counterfeiting based on versatile luminescence of tri-doped double perovskites

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Nano Research 2024年第11期17卷 9971-9979页

作者： Xingru Yang Yuhang Sheng Linglong Zhang Lun Yang Fangjian Xing Yunsong Di Cihui Liu Fengrui Hu Xifeng Yang Guofeng Yang Yushen Liu Zhixing Gan Center for Future Optoelectronic Functional Materials School of Computer and Electronic Information/School of Artificial Intelligence Nanjing Normal University Nanjing 210023 China College of Physics Nanjing University of Aeronautics and Astronautics Key Laboratory of Aerospace Information Materials and Physics (NUAA) MIIT Nanjing 211106 China Hubei Key Laboratory of Photoelectric Materials and Devices School of Materials Science and Engineering Hubei Normal University Huangshi 435002 China College of Engineering and Applied Sciences and MOE Key Laboratory of Intelligent Optical Sensing and Manipulation Nanjing University Nanjing 210093 China College of Electronic and Information Engineering Changshu Institute of Technology Suzhou 215500 China School of Science Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology Jiangnan University Wuxi 214122 China Yancheng Polytechnic College Yancheng 224005 China

Luminescent materials with multi-emission features are difficult to be replicated, which are highly desirable for advanced anti-counterfeiting. Here, we report the pioneering synthesis of Mn^(2+)/Yb^(3+)/Er^(3+) tri-doped Cs2Ag0.8Na0.2InCl6 double perovskites (MYE-DP), which exhibit photoluminescence (PL) covering from visible to near-infrared (NIR). The PL colors under excitations of 254 and 365 nm are notably different due to the changed relative emission intensities of self-trapped excitons (STEs) and Mn^(2+) d–d transition. Moreover, under the excitation of a NIR laser, the MYE-DP exhibits upconversion (UC) emissions of Mn^(2+) and Er^(3+). After ceasing the excitation, the long-lived trapped electrons can be thermally released to Mn^(2+) and Er^(3+) ions, resulting in both visible and NIR afterglow. Based on multi-modal emissions of the MYE-DP, we demonstrate a five-level anti-counterfeiting strategy, which significantly increases the anti-counterfeiting security. In addition, this work provides valuable insights into the energy transfer between STEs, Mn^(2+), Ln^(3+), and traps, laying a solid foundation for future development of new lead-free perovskites.

关键词： anti-counterfeiting photoluminescence self-trapped excitons upconversion

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Emerging hierarchical mesoporous materials of covalent organic frameworks

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science China Chemistry 2024年第9期67卷 2796-2802页

作者： Lingyan Huang Wenda Li Hongyi Zhang Shanzhe Ke Hao Chen Jianwei Fu Chengbin Jing Jiangong Cheng Shaohua Liu State Key Laboratory of Precision Spectroscopy/Engineering Research Center of Nanophotonics&Advanced Instrument(Ministry of Education) School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450052China State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

Benefiting from abundant exposed active sites,minimized diffusion resistance of guest molecules,facilitated mass transfer process and enhanced storage capacity,covalent organic frameworks(COFs)have gained widespread scientific attention[1–4].Further construction of mesopores regarding pore engineering(pore size,pore geometry,pore volume,and framework compositions)in COFs can improve mass transport,accessibility as well as size-selectivity of the special guest moieties,thus exhibiting potential in catalysis,energy storage and separation and so on[5,6].

关键词： gained catalysis separation

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Iron oxide/CNT-based artificial nacre for electromagnetic interference shielding

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Nano Research 2024年第7期17卷 6560-6566页

作者： Cheng-Xin Yu Yu-Feng Meng Bo Yang Jun Pang Xiang-Sen Meng Zi-Ye Zhao Qing-Yue Wang Li-Bo Mao Zhi-Kun Wu Shu-Hong Yu Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China Key Laboratory of Materials Physics Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China

Biological structural materials,despite consisting of limited kinds of compounds,display multifunctionalities due to their complex hierarchical *** some biomimetic strategies have been applied in artificial materials to enhance their mechanical stability,the simultaneous optimization of other functions along with the mechanical properties via biomimetic designs has not been thoroughly ***,iron oxide/carbon nanotube(CNT)-based artificial nacre with both improved mechanical and electromagnetic interference(EMI)shielding performance is fabricated via the mineralization of Fe_(3)O_(4)onto a CNTincorporated *** micro-and nano-structures of the artificial nacre are similar to those of natural nacre,which in turn improves its mechanical *** alternating electromagnetic wave-reflective CNT layers and the wave-absorptive iron oxide layers can improve the multiple reflections of the waves on the surfaces of the reflection layers,which then allows sufficient interactions between the waves and the absorption ***,compared with the reflection-dependent EMI-shielding of the non-structured material,the artificial nacre exhibits strong absorption-dependent shielding behavior even with a very low content of wave-absorptive *** to the high mechanical stability,the shielding effectiveness of the artificial nacre that deeply cut by a blade is still maintained at approximately 70%−96%depending on the incident wave *** present work provides a new way for designing structural materials with concurrently enhanced mechanical and functional properties,and a path to combine structural design and intrinsic properties of specific materials via a biomimetic strategy.

关键词： artificial nacre electromagnetic interference shielding biomineralization biomimetic material hierarchical structure

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