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Controllable synthesis of argentum decorated CuO_(x)@CeO_(2) catalyst and its highly efficient performance for soot oxidation

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Journal of Rare Earths 2022年第10期40卷 1546-1553页

作者： Jie Wan Yanjun Liu Yuanyuan Zhou Han Liu Gongde Wu Jianfei Kan Min Li Duan Weng Xiaodong Wu Energy Research Institute Nanjing Institute of TechnologyNanjing 211167China Key Laboratory of Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBejing 100084China School of Civil Engineering Southeast UniversityNanjing 211189China State Key Laboratory of Digital Household Appliances Haier Group Technique R&D CenterQingdao 266100China

In this paper,CuO_(x)@Ag/CeO_(2) catalysts were synthesized by simple wet-chemical method and equal volume impregnation *** obtained catalysts were subjected to soot temperature programmed oxidation(soot-TPO)activity tests and were further characterized by various techniques such as X-ray diffraction(XRD),transmission electron microscopy/high-resolution transmission electron microscopy(TEM/HR-TEM),N_(2) physisorption,X-ray photoelectron spectroscopy(XPS)and H_(2)-temperature programmed reduction(H_(2)-TPR).The results show that CuO_(x)@Ag/CeO_(2) synthesized presents well controlled core-shell structures,with nano-cube like Cu_(2)O as the core and Ag decorated polycrystalline CeO_(2) grafting layers as the *** core-shell structured CuO_(x)@Ag/CeO_(2) can successfully construct a secondary oxygen delivery channel(CuO_(x)→CeO_(2)→Ag)to effectively transfer bulk oxygen of the catalyst to the soot,resulting in its excellent soot oxidation activity compared to CuO_(x)@CeO_(2).The potential benefiting effect by Ag introduction over Cu@Ag/Ce can be concluded as:(ⅰ)pumping lattice oxygen and accelerating gaseous O_(2) dissociation to generate significantly increased active surface oxygen content;(ⅱ)modulating a moderate surface oxygen vacancies concentration to maintain more highly active O_(2) species.

关键词： Soot oxidation CuO_(x) Ag/CeO_(2) Controllable synthesis Active oxygen species Rare earths

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MedX-Net: Hierarchical Transformer with Large Kernel Convolutions for 3D Medical Image Segmentation

MedX-Net: Hierarchical Transformer with Large Kernel Convolu...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Lin Lu Qingzhi Zou Key Laboratory of Computing Power Network and Information Se-curity Ministry of Education Shandong Computer Science Center Qilu University of Technology (Shandong Academy of Sciences) Jinan China Shandong Engineering Research Center of Big Data Applied Technology Faculty of Computer Science and Technology Qilu University of Technology (Shandong Academy of Sciences) Jinan China Shandong Provincial Key Laboratory of Computer Networks Shandong Fundamental Research Center for Computer Science Jinan China

ISBN: (数字)9781665410205

ISBN: (纸本)9781665410212

Due to the exceptional performance of Transform-ers in 2 $D$ medical image segmentation, recent work has also introduced them into 3D medical segmentation tasks. For instance, Swin UNETR and other hierarchical Transformers have reintroduced prior knowledge from several convolutional networks, further enhancing the volume segmentation capabilities of models. The efficacy of these hybrid methodologies is primarily attributed to the substantial quantity of parameters and the nonlocal self-attention mechanism with a large receptive field. We argue that the behavior of these methods' large receptive fields can be simulated by employing fewer parameters through the utilization of depth-wise convolutions with large kernel. Within this manuscript, we introduce a lightweight volume segmentation model called MedX-Net, which uses convolutional network modules to simulate hierarchical Transformers for robust volume segmentation. Firstly, inspired by the hierarchical Transformer module of Swin UNETR, we investigate large-kernel depth-wise convolutions with different sizes to achieve a reduced model parameter count while maintaining a large global receptive field. Secondly, we replace the multilayer perceptron (MLP) in the hierarchical Transformer module with Inverted Bottleneck with Depthwise Convolution Enhancement(DWCE) to improve model performance with fewer activation and normalization layers, further reducing the parameter count. We validate the effectiveness and efficiency of our model for volume segmentation on three public datasets: Synapse, BTCV and ACDC. On the Synapse dataset, compared to Swin UNETR, our model achieves an improvement from 83.48% to 87.21% in Dice score. Compared to the result of 86.57% achieved by nnFormer, our model achieves superior performance while reducing the model parameter count by 64%.

关键词： Image segmentation Solid modeling Visualization Three-dimensional displays Current transformers Multilayer perceptrons Convolutional neural networks Kernel Synapses Biomedical imaging

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Electromagnetic Duality Symmetry-Protected Dirac-Like Cones

arXiv

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arXiv 2025年

作者： Yang, Muxuan Yan, Dongyang Gao, Lei Liu, Wei Lai, Yun Xu, Yadong Hang, Zhi Hong Luo, Jie School of Physical Science and Technology Collaborative Innovation Center of Suzhou Nano Science and Technology Jiangsu Key Laboratory of Frontier Material Physics and Devices Soochow University Suzhou215006 China Key Laboratory of Biophotonics Suzhou215104 China College for Advanced Interdisciplinary Studies National University of Defense Technology Hunan Changsha410073 China National Laboratory of Solid State Microstructures School of Physics Collaborative Innovation Center of Advanced Microstructures Jiangsu Physical Science Research Center Nanjing University Nanjing210093 China

Dirac-like cones, featuring conical linear dispersions intersecting with flat bands, typically arise from accidental degeneracy of multiple modes that requires precise tuning of material and structural parameters, inherently limiting their robustness and applications. In this work, by introducing electromagnetic duality symmetry into photonic crystals, we demonstrate the emergence of intrinsically robust deterministic Dirac-like cones. We show that such symmetry (achieved through either self-dual particles or non-self-dual particle clusters with duality-glide symmetry) enforces double degeneracies for band structures of photonic crystals. Furthermore, by harnessing the joint duality-structural symmetry, multiple deterministic Dirac-like cones exhibiting exceptional resilience to lattice size variations can be obtained. Our introduction of an extra symmetry into photonic crystals establishes a profound connection between duality symmetry and Dirac physics, providing a robust platform for advanced photonic band engineering. Copyright © 2025, The Authors. All rights reserved.

关键词： Photonic crystals

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Ferroelastic domain engineering in layered-perovskite Bi_(2)WO_(6) thin films by post-annealing

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Journal of advanced Dielectrics 2024年第2期14卷 71-76页

作者： Jia Yang Minchuan Liang Huayu Yang Hui Ai Tong Zhang Qing Han Ji Ma Houbing Huang Jing Wang Advanced Research Institute of Multidisciplinary Science and School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081P.R.China Analysis&Testing Center Beijing Institute of Technology Beijing 100081P.R.China School of Material Science and Engineering Kunming University of Science and Technology Kunming Yunnan 650093P.R.China

Due to the strong magneto-elastic coupling in ferromagnetic/ferroelectric heterostructures and the potential applications in lowpower magnetoelectric nanodevices,ferroelastic domains and the corresponding dynamic evolution under external stimuli have attracted intense research *** pulsed laser deposition method,we have successfully grown layered-perovskite Bi_(2)WO_(6)thin films on SrTiO_(3)(001)***,for the as-grown thin films with step-flow morphology,the relationship between ferroelastic domain number and size shows a normal distribution,which is similar to the Boltzman distribution for confined gas molecules at *** addition,with post-annealing,the thin films with as-grown island-like morphology can be optimized for layered morphology,and the initial small ferroelastic domains can grow into large *** study provides an effective strategy for ferroelastic domain engineering,which can be applied for the design of multiferroic heterostructures and low-power nanodevices.

关键词： Aurivillius oxides Bi_(2)WO_(6) thin films domain structure Boltzman distribution post-annealing

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Integrated Construction of Stretchable Supercapacitor with Outstanding Deformation Stability and Flame Retardancy

SSRN

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SSRN 2024年

作者： Mu, Hongchun Zhang, Zekai Wang, Wenqiang Lian, Cheng Wang, Gengchao Liu, Honglai Shanghai Engineering Research Center of Hierarchical Nanomaterials Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai200237 China State Key Laboratory of Chemical Engineering Shanghai Engineering Research Center of Hierarchical Nanomaterials Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai200237 China

The fast development of wearable electronics requires urgently stretchable energy storage devices, but conventional stretchable energy-storage devices suffer from poor dynamic deformation stability. The key is to create a new construction strategy of "electrode/electrolyte interface integration". Herein, we have proposed a clever strategy that combines layer-by-layer electrospinning with a self-selected vapor-phase polymerization (VPP) method to assemble the integrated stretchable supercapacitors (ISSCs). Furthermore, the interface stability enhancement mechanism is revealed through experimental and theoretical simulations, showing that the synergistic effect of molecular chain entanglement and mechanical meshing endows excellent anti-deformation stability of ISSCs. As a result, the as-assembled ISSCs deliver excellent dynamic deformation electrochemical stability with 99.5% capacitance retention after 500 stretching cycles at 100% strain and outstanding flame retardancy (limiting oxygen index (LOI) up to 48.1% at a film thickness of only 0.22 mm). The innovative integrated design strategy endows a systematic construction plan for the scalable fabrication of wearable organic energy storage devices. © 2024, The Authors. All rights reserved.

关键词： Supercapacitor

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Self-confocal NIR-II fluorescence microscopy for multifunctional in vivo imaging

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Journal of Innovative Optical Health sciences 2024年第1期17卷 105-119页

作者： Jing Zhou Tianxiang Wu Runze Chen Liang Zhu Hequn Zhang Yifei Li Liying Chen Jun Qian State Key Laboratory of Modern Optical Instrumentations Centre for Optical and Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310058P.R.China Dr.Li Dak Sum&Yip Yio Chin Center for Stem Cell and Regenerative Medicine Zhejiang UniversityHangzhou 310058P.R.China College of Biomedical Engineering and Instrument Science Interdisciplinary Institute of Neuroscience and Technology(ZIINT)Zhejiang UniversityHangzhou 310027P.R.China

Fluorescence imaging in the second near-infrared window(NIR-II,900–1880 nm)with less scattering background in biological tissues has been combined with the confocal microscopic system for achieving deep in vivo imaging with high spatial ***,the traditional NIR-IIfluorescence confocal microscope with separate excitation focus and detection pinhole makes it possess low confocal e±ciency,as well as di±cultly to *** types of upgraded NIR-IIfluorescence confocal microscopes,sharing the same pinhole by excitation and emission focus,leading to higher confocal e±ciency,are built in this *** type is-ber-pinhole-based confocal microscope applicable to CW laser *** is constructed forfluorescence intensity imaging with large depth,high stabilization and low cost,which could replace multiphotonfluorescence microscopy in some applications(e.g.,cerebrovascular and hepatocellular imaging).The other type is air-pinhole-based confocal microscope applicable to femtosecond(fs)laser *** can be employed not only for NIR-IIfluorescence intensity imaging,but also for multi-channelfluorescence lifetime imaging to recognize different structures with similarfluorescence ***,it can be facilely combined with multiphotonfluorescence microscopy.A single fs pulsed laser is utilized to achieve up-conversion(visible multiphotonfluorescence)and down-conversion(NIR-II one-photonfluorescence)excitation simultaneously,extending imaging spectral channels,and thus facilitates multi-structure and multi-functional observation.

关键词： Self-confocal fiber-pinhole air-pinhole multi-channe fluorescence lifetime imaging multi-color imaging

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Ionic liquid-based supported liquid membranes for enhanced cesium continuous separation via crown-ether facilitated transport

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Journal of Membrane science 2025年 731卷

作者： He, Jintao Hua, Junyuan Ma, Xiaohua Li, Jianxin State Key Laboratory of Advanced Separation Membrane Materials National Center for International Joint Research on Membrane Science and Technology Tiangong University Tianjin300387 China School of Materials Science and Engineering Tiangong University Tianjin300387 China Institute for Nanotechnology and Water Sustainability College of Science Engineering and Technology University of South Africa Science Campus Florida Johannesburg1710 South Africa

The global high-tech industry is experiencing a consistent rise in the demand for cesium. Consequently, it is essential to establish a continuous and energy-efficient method for the recovery of Cs+ from aqueous solutions. In this study, a novel supported ionic liquid membrane (SILM) was engineered by incorporating a crown ether-ionic liquid extraction system into the pores of a crown ether-based porous membrane, which was synthesized from 18-crown-6 ether-based polyimide (CE-PI) through non-solvent induced phase separation (NIPS). The findings indicate that the Cs+ permeation rate in the SILM system containing free crown ether with a concentration of 0.12 mol/L achieved 3.36 μm/s, representing a 24-fold increase compared to that of the SILM system without free crown ether. When the feed phase comprised mixed ions (K+/Cs+/Rb+) at a concentration of 50 ppm each, and 0.5 mol/L HCl was used as a stripping phase, the Cs+ permeation flux of the SILM system reached 0.233 μg m−2 s−1, which is substantially greater than that of the competing ions K+ (0.001 μg m−2 s−1) and Rb+ (0.005 μg m−2 s−1). The corresponding separation factors (SF) for Cs/K and Cs/Rb in the SILM system were determined to be 10.10 and 7.44, respectively. The high performance of the SILM system is attributed to the ion transport channels established by the free crown ether and ionic liquid within the membrane pores. DFT calculations and MD simulations demonstrated that the free crown ethers in the ionic liquid are instrumental in selectively complexing Cs+ owning to their unique chelation interaction (ECs = −288.5 kJ/mol), thereby promoting the transport of Cs+ within the SILM system. © 2025 Elsevier B.V.

关键词： Solvent extraction

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Assessing underlying pulsatile structures with laparoscopic tools using proximal vibroacoustic sensing

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Current Directions in Biomedical Engineering 2024年第1期10卷 37-40页

作者： Kaabachi, Syrine Illanes, Alfredo Esmaeili, Nazila Sühn, Thomas Spiller, Moritz Friebe, Michael Hansen, Christian Boese, Axel INKA-Innovation Laboratory for Image Guided Therapy Otto-von-Guericke University Magdeburg Germany SURAG Medical GmbH Leipzig Germany Computer Aided Medical Procedures and Augmented Reality Technical University of Munich Munich Germany AGH University of Science and Technology Department of Biocybernetics and Biomedical Engineering Krakow Poland CIBE - Center of Innovation Business Development & Entrepreneurship FOM University of Applied Sciences Essen Germany Research Campus STIMULATE Otto von Guericke University Magdeburg Germany

This work presents a novel approach for detecting underlying pulsatile structures with laparoscopic tools by using proximal vibroacoustic sensing. This new method could detect pulsations at a depth of up to 1.5 cm. The outcome of this work indicates the potential of identifying deep-seated pulsatile structures during robot-assisted laparoscopy, where haptic feedback is highly limited, to help surgeons prevent vascular damage that may lead to injuries. © 2024 by Walter de Gruyter Berlin/Boston.

关键词： Laparoscopy

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Enhancing The Quantum Yield and Stability of Cspbbr3 Quantum Dots with Zwitterionic Ligand Post-Treatment

SSRN

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SSRN 2023年

作者： Deng, Changbo Fu, Tingxin Huang, Qiuping Fu, Zhengping Lu, Yalin Department of Materials Science and Engineering University of Science and Technology of China Anhui Hefei230026 China Anhui Laboratory of Advanced Photon Science and Technology Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei230026 China

The poor stability and low photoluminescence quantum yield (PLQY) of halide perovskite quantum dots (QDs) have been major challenges for their future practical application. Ligand engineering has been demonstrated as an effective approach for enhancing both stability and PLQY. Herein, we introduce a zwitterionic ligand, specifically N-tetradecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate (TDPS), to synthesize stable CsPbBr3 QDs by ligand post-treatment. The as-prepared TDPS-QDs exhibited an exceptional PLQY of 86.47% and superior colloidal stability when exposed to UV light, heat, and polar solvents, owing to surface defect passivation and strong affinity to the surfaces. The PL intensity of TDPS-QDs maintains approximately 68% (120 min) and 103% (48 h) of its initial emission intensity under continuous irradiation or heat, respectively, whereas OA-QDs (pristine CsPbBr3 QDs) undergo greater quenching within a shorter period. The findings highlight the potential for TDPS ligand modification to simultaneously improve the QY and stability, thus opening novel avenues for future applications involving CsPbBr3 QDs. © 2023, The Authors. All rights reserved.

关键词： Nanocrystals

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Experimental Investigation on Micro Deep Drawing of Stainless Steel Foils with Different Microstructural Characteristics

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Chinese Journal of Mechanical Engineering 2021年第2期34卷 179-189页

作者： Jingwei Zhao Tao Wang Fanghui Jia Zhou Li Cunlong Zhou Qingxue Huang Zhengyi Jiang College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan 030024China TYUT-UOW Joint Research Center Taiyuan University of TechnologyTaiyuan 030024China TYUT-UOW Joint Research Center University of WollongongWollongongNSW 2522Australia School of Mechanical MaterialsMechatronic and Biomedical EngineeringUniversity of WollongongWollongongNSW 2522Australia Shanxi Provincial Key Laboratory on Metallurgical Device Design and Theory Taiyuan University of Science and TechnologyTaiyuan 030024China

In the present work,austenitic stainless steel(ASS)304 foils with a thickness of 50μm were first annealed at temperatures ranging from 700 to 1100℃for 1 h to obtain different microstructural *** the effects of microstructural characteristics on the formability of ASS 304 foils and the quality of drawn cups using micro deep drawing(MDD)were studied,and the mechanism involved was *** results show that the as-received ASS 304 foil has a poor formability and cannot be used to form a cup using *** wrinkling problem occurs on the drawn cup,and the height profile distribution on the mouth and the symmetry of the drawn cup is quite non-uniform when the annealing temperature is 700℃.At annealing temperatures of 900 and 950℃,the drawn cups are both characterized with very few wrinkles,and the distribution of height profile,symmetry and mouth thickness are uniform on the mouths of the drawn *** wrinkling becomes increasingly significant with a further increase of annealing temperature from 950 to 1100℃.The optimal annealing temperatures obtained in this study are 900 and 950℃for reducing the generation of wrinkling,and therefore improving the quality of drawn *** non-optimized microstructure,the distribution of the compressive stress in the circumferential direction of the drawn foils becomes inhomogeneous,which is thought to be the cause of the occurrence of localized deformation till wrinkling during MDD.

关键词： Microforming Micro deep drawing Stainless steel foils Wrinkling Annealing Microstructure

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