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Recent development of E-field control of interfacial magnetism in multiferroic heterostructures

Nano Research 2023年第4期16卷 5983-6000页

作者： yuxin Cheng Shishun Zhao Ziyao Zhou Ming Liu The Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringState Key Laboratory for Mechanical Behavior of Materialsthe International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologyXi'an Jiaotong UniversityXi'an 710049China

The full E-field control of multiferroic interfacial magnetism is a long-standing challenge for micro-electromechanical systems(MEMS)and has the potential to transform electronics operation mechanisms.When scaling down conventional complementary metal-oxide semiconductor(CMOS)devices,increased heating dissipation becomes a top concern.Combining the highly correlated ferroic orders,notably the strongly coupled interfacial magnetoelectric(ME)interactions,may lead to devices beyond CMOS.These devices use the electric field to regulate magnetization,which opens up the prospect of downsizing,improved performance,and lower power consumption.To broadly survey this tremendous scope within the last five years,this review summarizes advances in voltage control of interfacial magnetism(VCIM)with various material system selection;controlling effects with different gating methods are also explored.Five classic mechanisms are demonstrated:strain,exchange bias,orbital reconstruction,and the electrostatic and electrochemical.The encouraging photovoltaic approach is also discussed.Each method’s capabilities and application scenarios are compared.Analyses of the comprehensive gating results of different magnetic coupling effects such as perpendicular magnetic anisotropy(PMA)and Ruderman-Kittel-Kasuya-Yosida(RKKY)are additionally made.At last,controlling of skyrmions and two-dimensional(2D)material magnetization is summarized,indicating that E-field gating offers a universal approach with few limitations for material selection.These results point to potential for E-field control interfacial magnetism and predict significant future advancements for spintronics.

关键词： multiferroic magnetoelectric coupling strain charge photovoltaic

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Plasma treated M1 MoVNbTeO_(x)-CeO_(2) composite catalyst for improved performance of oxidative dehydrogenation of ethane

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Green Energy & Environment 2023年第3期8卷 904-914页

作者： Shuairen Qian yuxin Chen Binhang Yan Yi cheng Department of Chemical Engineering Tsinghua UniversityBeijing100084China

High activity and productivity of MoVNbTeO_(x) catalyst are challenging tasks in oxidative dehydrogenation of ethane(ODHE)for industrial application.In this work,phase-pure M1 with 30 wt%CeO_(2) composite catalyst was treated by oxygen plasma to further enhance catalyst performance.The results show that the oxygen vacancies generated by the solid-state redox reaction between M1 and CeO_(2) capture active oxygen species in gas and transform V^(4+)to V^(5+)without damage to M1 structure.The space-time yield of ethylene of the plasma-treated catalyst was significantly increased,in which the catalyst shows an enhancement near~100% than that of phase-pure M1 at 400℃ for ODHE process.Plasma treatment for catalysts demonstrates an effective way to convert electrical energy into chemical energy in catalyst materials.Energy conversion is achieved by using the catalyst as a medium.

关键词： Oxidative dehydrogenation of ethane(ODHE) MoVNbTeO_(x) Composite catalyst Oxygen plasma Energy conversion

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Monocular Distance Estimated Based on PTZ Camera

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Computers, Materials & Continua 2024年第5期79卷 3417-3433页

作者： Qirui Zhong Xiaogang cheng yuxin Song Han Wang Bell Honors School Nanjing University of Posts and Telecommunications Nanjing210003China College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing210003China College of Automation and College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing210003China

This paper introduces an intelligent computational approach for extracting salient objects fromimages and estimatingtheir distance information with PTZ (Pan-Tilt-Zoom) cameras. PTZ cameras have found wide applications innumerous public places, serving various purposes such as public securitymanagement, natural disastermonitoring,and crisis alarms, particularly with the rapid development of Artificial Intelligence and global infrastructuralprojects. In this paper, we combine Gauss optical principles with the PTZ camera’s capabilities of horizontal andpitch rotation, as well as optical zoom, to estimate the distance of the object.We present a novel monocular objectdistance estimation model based on the Focal Length-Target Pixel Size (FLTPS) relationship, achieving an accuracyrate of over 95% for objects within a 5 km range. The salient object extraction is achieved through a simplifiedconvolution kernel and the utilization of the object’s RGB features, which offer significantly faster computingspeeds compared to Convolutional Neural Networks (CNNs). Additionally, we introduce the dark channel beforethe fog removal algorithm, resulting in a 20 dB increase in image definition, which significantly benefits distanceestimation. Our system offers the advantages of stability and low device load, making it an asset for public securityaffairs and providing a reference point for future developments in surveillance hardware.

关键词： Public security location information PTZ camera image processing

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Thermal sensation and percentage of dissatisfied in thermal environments with positive and negative vertical air temperature differences

Energy and Built Environment

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Energy and Built Environment 2023年第6期4卷 629-638页

作者： yuxin Wu Sheng Zhang Hong Liu Yong cheng School of Civil Engineering and Architecture Zhejiang Sci-Tech UniversityHangzhouZhejiang 310018China Joint International Research Laboratory of Green Buildings and Built Environments(Ministry of Education) Chongqing UniversityChongqing 400045China School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Civil Engineering Chongqing UniversityChongqing 400045China

Considering the percentage of dissatisfied due to local thermal sensation(PD LTSV),a vertical air temperature difference(ΔT_(d))threshold of about 3°C was recommended in standards.However,some novel air distribution methods might create large positive(which means the head warmer than the feet,vice versa)or negativeΔT_(d),with no suitable proved criteria to be used.In this study,sixteen subjects were seated in a climatic box placed in a climate chamber to evaluate thermal sensation and percentage of dissatisfied with negative and positiveΔT_(d) in different whole-body thermal conditions.Air temperatures were controlled independently at the upper and lower body parts,with 13 different air temperature sets combined with 22°C,25°C,28°C,and 31°C(i.e.-9°C≤ΔT_(d)≤9°C).Results showed that subjects were more thermally sensitive at the upper body and with positiveΔT_(d) than at the lower body or with negativeΔT_(d).The 80%acceptableΔT_(d) range is about-8 to 7°C in overall neutral(TSV=0),-7°C to 6°C in slightly cool(TSV=-0.5)conditions,which is wider than-3 to 3°C in slightly warm conditions(TSV=+0.5).By considering the factors of both TSV andΔT_(d),a new overall percentage of dissatisfied index(OPD P)was proposed.Case studies show that the new OPD P index is more precise and suitable for the evaluations of different air distributions to predict overall percentage of dissatisfied in thermal environments with vertical air temperature difference.

关键词： Vertical air temperature difference Thermal sensation Thermal comfort Percentage of dissatisfied Air distribution

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Induced Dopaminergic Neurons for Parkinson's Disease Therapy: Targeting the Striatum or Midbrain/Substantia Nigra Pars Compacta?

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Neuroscience Bulletin 2022年第7期38卷 820-824页

作者： Huadong Xu Xu cheng Qian Song yuxin Yang Changhe Wang Xinjiang Kang Key Laboratory of Medical Electrophysiology Ministry of Education of ChinaThe Institute of Cardiovascular ResearchSouthwest Medical UniversityLuzhou 646000China Neuroscience Research Center Institute of Mitochondrial Biology and MedicineKey Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXi'an 710049China Department of Neurology The First Affliated Hospital of Xi'an Jiaotong UniversityXian 710061China College of Life Science Liaocheng UniversityLiaocheng 252059China

Parkinson's disease(PD)is a common neurodegenerative disease among the elderly,characterized by the specific loss of dopaminergic(DAergic)neurons in the substantia nigra pars compacta(SNpc)and defects in dopamine(DA)r... 详细信息

关键词： Dopamine Therapy dopamine

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Recent advances in surface endothelialization of the magnesium alloy stent materials

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Journal of Magnesium and Alloys 2023年第1期11卷 48-77页

作者： Changjiang Pan Xuhui Liu Qingxiang Hong Jie Chen yuxin Cheng Qiuyang Zhang Lingjie Meng Juan Dai Zhongmei Yang Lingren Wang Faculty of Mechanical and Material Engineering Jiangsu Provincial Engineering Research Center for Biomaterials and Advanced Medical DevicesHuaiyin Institute of TechnologyHuai’an 223003China The Affiliated Huai’an Hospital of Xuzhou Medical University Huai’an 223003China

Magnesium and its alloy have good mechanical properties and biodegradability,and have become the hotspot of the next-generation biodegradable vascular stent materials.However,their rapid degradation in vivo and poor biocompatibility are still the bottlenecks of clinical applications for the cardiovascular stents.In particular,how to induce the repair and regeneration of the vascular endothelial with normal physiological functions on the surface of the magnesium alloy stent materials represents the key to its clinical application in the field of cardiovascular stents.It has been believed that it is an ideal way to completely solve the postoperative complications through constructing the multifunctional anti-corrosive bioactive coating on the magnesium alloy surface to induce the formation of vascular endothelium with normal physiological functions.However,how to construct a corrosion-resistant multifunctional bioactive coating with the good endothelial regeneration abilities on the magnesium alloy surface still faces a great challenge.This paper mainly focused on highlighting and summarizing the recent advances in the surface endothelialization of the magnesium alloy materials for the vascular stent,including the bio-inert coating,in-situ immobilization of bioactive molecules on the surface,polymer coating loaded with bioactive factors,novel multifunctional polymer coating,bioactive micropatterns,bioactive layer with glycocalyx-like structure,NO-releasing coating and bioactive sol-gel coating.The advantages and disadvantages of these strategies were discussed and analyzed.Finally,in the senses of future development and clinical application,this paper analyzed and summarized the development direction and prospect of surface endothelialization of the magnesium alloy vascular stents.It is anticipated that this review can give the new cues to the surface endothelialization of the cardiovascular magnesium alloy stents and promote future advancements in this field.

关键词： Magnesium alloy Stent Endothelialization Surface coating Surface modification

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Ion elemental-optimized layered double hydroxide nanoparticles promote chondrogenic differentiation and intervertebral disc regeneration of mesenchymal stem cells through focal adhesion signaling pathway

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Bioactive Materials 2023年第4期22卷 75-90页

作者： Zhaojie Wang Huiyi Yang Xu Xu Hongxing Hu yuxin Bai Jian Hai Liming cheng Rongrong Zhu Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education Department of OrthopedicsTongji Hospital Affiliated to Tongji UniversitySchool of Life Science and TechnologyTongji UniversityShanghai200065China Frontier Science Center for Stem Cell Research Tongji UniversityShanghai200065China

Chronic low back pain and dyskinesia caused by intervertebral disc degeneration(IDD)are seriously aggravated and become more prevalent with age.Current clinical treatments do not restore the biological structure and inherent function of the disc.The emergence of tissue engineering and regenerative medicine has provided new insights into the treatment of IDD.We synthesized biocompatible layered double hydroxide(LDH)nanoparticles and optimized their ion elemental compositions to promote chondrogenic differentiation of human umbilical cord mesenchymal stem cells(hUC-MSCs).The chondrogenic differentiation of LDH-treated MSCs was validated using Alcian blue staining,qPCR,and immunofluorescence analyses.LDH-pretreated hUC-MSCs were differentiated prior to transplantation into the degenerative site of a needle puncture IDD rat model.Repair and regeneration evaluated using X-ray,magnetic resonance imaging,and tissue immunostaining 4-12 weeks after transplantation showed recovery of the disc space height and integrated tissue structure.Transcriptome sequencing revealed significant regulatory roles of the extracellular matrix(ECM)and integrin receptors of focal adhesion signaling pathway in enhancing chondrogenic differentiation and thus prompting tissue regeneration.The construction of ion-specific LDH nanomaterials for in situ intervertebral disc regeneration through the focal adhesion signaling pathway provides theoretical basis for clinical transformation in IDD treatment.

关键词： Mesenchymal stem cells Layered double hydroxide Chondrogenic differentiation Intervertebral disc degeneration Focal adhesion signaling pathway

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Multi-scale simulation of diffusion behavior of deterrent in propellant

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Chinese Journal of Chemical Engineering 2023年第2期54卷 29-35页

作者： Pan Huang Zekai Zhang yuxin Chen Changwei Liu Yong Zhang cheng Lian Yajun Ding Honglai Liu State Key Laboratory of Chemical Engineering Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China School of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai 200237China School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China

Concentration distribution of the deterrent in single-base propellant during the process of firing plays an important role in the ballistic properties of gun propellant in weapons. However, the diffusion coefficient calculated by molecular dynamics(MD) simulation is 6 orders of magnitude larger than the experimental values. Meanwhile, few simple and comprehensive theoretical models can explain the phenomenon and accurately predict the concentration distribution of the propellant. Herein, an onion model combining with MD simulation and finite element method of diffusion in propellants is introduced to bridge the gap between the experiments and simulations, and correctly predict the concentration distribution of deterrent. Furthermore, a new time scale is found to characterize the diffusion process. Finally, the time-and position-depended concentration distributions of dibutyl phthalate in nitrocellulose are measured by Raman spectroscopy to verify the correctness of the onion model. This work not only provides guidance for the design of the deterrent, but could be also extended to the diffusion of small molecules in polymer with different crystallinity.

关键词： Multi-scale simulation Diffusion Deterrent Propellant Onion model Molecular dynamics simulation

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An advanced ash fusion study on the melting behaviour of coal,oil shale and blends under gasification conditions using picture analysis and graphing method

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Chinese Journal of Chemical Engineering 2021年第4期34卷 393-407页

作者： Yang Meng Peng Jiang yuxin Yan yuxin Pan Xinyun Wu Haitao Zhao Nusrat Sharmin Edward Lester Tao Wu cheng Heng Pang Department of Chemical and Environmental Engineering The University of Nottingham Ningbo ChinaNingbo 315100China Ningbo New Materials Institute The University of NottinghamNingbo 315042China Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridge 02139USA Department of Chemical and Environmental Engineering The University of NottinghamNottingham NG72RDUK Key Laboratory for Carbonaceous Wastes Processing and Process Intensification Research of Zhejiang Province The University of Nottingham Ningbo ChinaNingbo 315100China

This study investigates the potential of solid fuel blending as an effective approach to manipulate ash melting behaviour to alleviate ashrelated problems during gasification,thus improving design,operability and safety.The ash fusion characteristics of Qinghai bituminous coal together with Fushun,Xinghua and Laoheishan oil shales(and their respective blends)were quantified using a novel picture analysis and graphing method,which incorporates conventional ash fusion study,dilatometry and sintering strength test,in a CO/CO_(2)atmosphere.This imagebased characterisation method was used to monitor and quantify the complete melting behaviour of ash samples from room temperature to 1520℃.The impacts of blending on compositional changes during heating were determined experimentally via Xray diffraction and validated computationally using FactSage.Results showed that the melting point of Qinghai coal ash to be the lowest at 1116℃,but would increase up to 1208℃,1161℃and 1160℃with the addition of 30%50%of Laoheishan,Fushun,and Xinghua oil shales,respectively.The formation of highmelting anorthite and mullite structures inhibits the formation of lowmelting hercynite.However,the sintering point of Qinghai coal ash was seen to decrease from 1005℃to 855℃,834℃,and 819℃in the same blends due to the formation of lowmelting aluminosilicate.Results also showed that blending directly influences the sintering strength during the various stages of melting.The key finding from this study is that it is possible to mitigate against the severe ash slagging and fouling issue arising from high calcium and iron coals by cogasification with a high silicaalumina oil shale.Moreover,blending coals with oil shales can also modify the ash melting behaviour of fuels to create the optimal ash chemistry that meets the design specification of the gasifier,without adversely affecting thermal performance.

关键词： Oil shale Coal Image-based ash fusion test Co-gasification Mineral transformation

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Fully conversing and highly selective oxidation of benzene to phenol based on MOFs-derived CuO@CN photocatalyst

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Chinese Chemical Letters 2023年第4期34卷 345-348页

作者： Longjiang Sun Dongxu Wang yuxin Li Baogang Wu Qi Li cheng Wang Shuao Wang Baojiang Jiang Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China School of Pharmacy Jiamusi UniversityJiamusi 154007China State Key Laboratory of Radiation Medicine and Protection School for Radiological and interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow UniversitySuzhou 215123China Guangdong Laboratory of Chemitry and Fine Chemical Industry Jieyang Center Guangdong University of TechnologyJieyang 510006China

Developing highly efficient photocatalysts for selective oxidation of benzene to phenol is of great significance. However, it is still challenging to simultaneously achieve high conversion rate and selectivity.Herein, we demonstrate 99.9% of benzene photoconversion and 99.1% of phenol selectivity under the illumination of AM 1.5 for 12 h. For this purpose, an advanced CuO@CN photocatalyst has been fabricated by loading tubular carbon nitride(CN) with CuO nanoparticles thermally polymerized from Cu-based metal-organic frameworks(MOFs). The sluggish photocharge carrier recombination rate and the excellent stability indicate that the as-prepared nanocomposite is an ideal photocatalyst for benzene oxidation application. This work paves a new avenue for designing novel photocatalyst based on MOFs and carbon nitride materials.

关键词： Photocatalysis MOF CuO@CN Selectivity oxidation Highlyconversion rate

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