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High-performance ultraviolet-visible photodetector with high sensitivity and fast response speed based on MoS_(2)-on-ZnO photogating heterojunction

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Tungsten 2023年第1期5卷 91-99页

作者： Xing-Lai Zhang Jing Li Bing Leng Liu Yang Yan-Dong Song Si-Yu Feng Li-Zhi Feng Zi-Tong Liu Zheng-Wei Fu Xin Jiang Bao-Dan Liu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesNo.72 Wenhua RoadShenyang 110016China School of Material Science and Engineering Northeastern UniversityNo.11 Wenhua RoadShenyang 110819China Foshan Graduate School of Northeastern University No.2 Zhihui RoadFoshan 528300China Department of Plastic Surgery The First Affiliated Hospital of China Medical UniversityNo.155 North Nanjing StreetShenyang 110001China School of Materials Science and Engineering University of Science and Technology of ChinaNo.72 Wenhua RoadShenyang 110016China

Photogating is an effective strategy to modulate the channel conductance of the device with light-induced gate field or voltage,thereby improving the performance of optoelectronic *** this work,to overcome the long response time and low photoresponse of one-dimensional ZnO,a MoS_(2)-on-ZnO photogating vertical heterojunction photodetector is design and ***,the ZnO nanowire with high carrier mobility can response ultraviolet light and supply a highspeed carrier transport channel,while the MoS_(2) flake as a photogating layer can response with visible light and transfer photogenerated electrons into the ZnO nanowire to adjust its ***,the irradiation of visible light is equivalent to applying a photo-induced gate voltage on the ZnO *** addition,the photogenerated electrons will not transmit through the MoS_(2) with low carrier mobility,so that not only the visible light response of the photodetector can be realized,but also its ultraviolet light response is able to be *** ultraviolet light irradiation,the photoresponsivity of the photodetector can be reached to 273 A W-1and the response speed is less than 24 *** important,based on this unique heterojunction structure,MoS_(2)-on-ZnO photodetector also illustrates an excellent visible light response with a high photoresponsivity(74 A W-1) and fast response speed(<24 ms) due to the photogating *** work not only paves the way to design high-performance photodetectors with high photoresponsivity and fast response speed,but also provide a promising approach to improve the performance of optoelectronic devices using photogating effect.

关键词： MoS_(2) ZnO Two-dimension Photogating Photodetectors

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利塞膦酸钠可溶性微针的制备及预防绝经后骨质疏松症研究

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中国药学杂志 2024年第16期59卷 1522-1531页

作者：梁俊晖苏安宇杨雅雯李亚欣边影彤邓世森袁秋虹王利胜广州中医药大学中药学院广州510006 帝国理工学院生命科学与医学学院伦敦SW72AZ

目的制备利塞膦酸钠可溶性微针,对其进行表征及预防绝经后骨质疏松症药效评价。方法通过响应面法优选微针的制备工艺;采用扫描电镜、皮内溶解试验、穿刺试验、皮肤屏障恢复试验与体外透皮试验对所制得微针的外观、溶解性能、机械性能... 详细信息

目的制备利塞膦酸钠可溶性微针,对其进行表征及预防绝经后骨质疏松症药效评价。方法通过响应面法优选微针的制备工艺;采用扫描电镜、皮内溶解试验、穿刺试验、皮肤屏障恢复试验与体外透皮试验对所制得微针的外观、溶解性能、机械性能、安全性、透皮特性进行表征;采用卵巢切除骨质疏松症模型大鼠进行药效学评价。结果经过优选的微针配方为聚乙烯吡咯烷酮-硫酸软骨素(PVP K30-CS)配比为1∶0.86,溶剂占比55%;所得微针具有良好的性状,并展现出与口服给药相似的Ca^(2+)、P^(3+)和碱性磷酸酶(alkaline phosphatase,ALP)水平调节能力,显著提升模型大鼠骨密度并修复其骨微结构。结论利塞膦酸钠可溶性微针质量稳定、使用方便、药效确切,是干预绝经后骨质疏松症的潜在选项。

关键词：利塞膦酸钠双膦酸盐可溶性微针骨质疏松响应面法

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Endoscopic treatment of scarred polyps with a non-thermal device(Endorotor):A review of the literature

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World Journal of Gastroenterology 2024年第12期30卷 1706-1713页

作者： Mariam Zaghloul Hameed Rehman Stefano Sansone Konstantinos Argyriou Adolfo Parra-Blanco Department of Hepatology Gastroenterology and Infectious DiseasesKafrelsheikh UniversitKafr-Elshikh 33516Egypt Department of Gastroenterology Service Nottingham City Hospital CampusNottingham University Hospitals NHS TrustNottingham NG51PBUnited Kingdom Department of Gastroenterology University Hospital of LarissaLarissa 41334Greece NIHR Nottingham Biomedical Research Centre Nottingham University Hospitals NHS Trust and University of NottinghamNottingham NG72UHUnited Kingdom

Endoscopic resection(ER)of colorectal polyps has become a daily practice in most endoscopic units providing a colorectal cancer screening program and requires the availability of local experts and high-end endoscopic *** procedures have evolved over the past few years from endoscopic mucosal resection(EMR)to more advanced techniques,such as endoscopic submucosal dissection and endo-scopic full-thickness *** resection and disease eradication are the ultimate goals of ER-based techniques,and novel devices have been developed to achieve these *** EndoRotor®Endoscopic Powered Resection System(Interscope Medical,Inc.,Northbridge,Massachusetts,United States)is one such *** EndoRotor is a powered resection tool for the removal of alimentary tract mucosa,including post-EMR persistent lesions with scarring,and has both CE Mark and FDA *** review covers available published evidence documenting the usefulness of EndoRotor for the management of recurrent colorectal polyps.

关键词： EndoRotor Scarred polyps Recurrent polyps Colorectal cancer Colorectal polyps

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基于自产热和外传热的锂离子电池热学模型参数辨识方法

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电工技术学报 2024年第1期39卷 278-288页

作者：孙丙香宋东林阮海军张维戈郑凯元北京交通大学国家能源主动配电网技术研发中心北京100044 伦敦帝国理工学院戴森设计工程学院伦敦SW72AZ

锂离子电池热学模型参数(热容和热阻)的准确辨识对电池热电耦合建模及状态参数估计至关重要。然而传统测量方法成本高且测试周期长,如何利用充放电工况结合产热和传热机理研究快速热参数辨识方法具有重要意义。以8A×h软包锂离子电池为... 详细信息

锂离子电池热学模型参数(热容和热阻)的准确辨识对电池热电耦合建模及状态参数估计至关重要。然而传统测量方法成本高且测试周期长,如何利用充放电工况结合产热和传热机理研究快速热参数辨识方法具有重要意义。以8A×h软包锂离子电池为研究对象,建立分布式热路模型;设计双向脉冲工况实验,采用自适应粒子群算法(APSO)进行辨识;同时采用其他工况进行验证,实验和仿真温度误差小于0.1℃。另外,将热容和热阻转换为比热容和导热系数,并与其他文献中同类电池的参数进行比对,量级接近。研究结果表明,该方法可以有效解决层叠式软包锂离子电池热学模型参数辨识难的问题,且简便易行、成本低。

关键词：层叠式软包锂离子电池分布式热路模型热容和热阻自产热和外传热

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Highly efficient visible-light photocatalytic degradation and antibacterial activity by GaN:ZnO solid solution nanoparticles

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Journal of Materials Science & Technology 2021年第35期94卷 67-76页

作者： Bing Leng Xinglai Zhang Shanshan Chen Jing Li Ziqing Sun Zongyi Ma Wenjin Yang Bingchun Zhang Ke Yang Shu Guo Department of Plastic Surgery The First Affiliated Hospital of China Medical UniversityNo.155 North Nanjing StreetShenyang 1W001China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesNo.72 Wenhua RoadShenyang 110016China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChines Academy of Sciences.No.72 Wenhua RoadShenyang 110016China

The development of high-efficiency photocatalysts is the primary goal in the field of photocatalytic antibacterial *** this work,the Ga N:Zn O solid solution nanoparticles(NPs)photocatalyst with strong visible absorption and large specific surface area was synthesized via the sol-gel and nitridation reaction ***,we systematically investigated the removal efficiency of the organic pollutant and antibacterial activity on *** and ***,methylene blue solution could be completely degraded after 100 min of visible light illumination using 2 mg/m L Ga N:Zn O ***,~94%of the *** were inactivated within 120 min,whereas 100%antibacterial activity against *** was achieved after 90 min of visible light illumination mediated by Ga N:Zn O *** further explore the potential mechanism of visible light photocatalytic antibacterial activity enhanced by Ga N:Zn O NPs *** current work not only provides a new and efficient photocatalytic antibacterial nanomaterial but also demonstrates its promising applications in environmental and biological fields.

关键词： GaN:ZnO solid solution Photocatalysis Antibacterial Photocatalytic degradation Photocatalysts

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聚光太阳能SCO_(2)热发电系统性能分析与优化设计

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太阳能学报 2024年第7期45卷 590-598页

作者：范刚宋健宫啸宇傅子隽张嘉耕戴义平西安交通大学能源与动力工程学院西安710048 帝国理工学院清洁能源过程实验室伦敦SW72AZ

针对聚光太阳能超临界二氧化碳(SCO_(2))热发电系统展开研究,构建系统热力学性能分析模型,分析集热侧、动力循环侧的性能,揭示系统集热-蓄热-热功转化之间的相互匹配特性规律,综合分析比较不同集热器、储热工质、动力循环组成的聚光太阳... 详细信息

针对聚光太阳能超临界二氧化碳(SCO_(2))热发电系统展开研究,构建系统热力学性能分析模型,分析集热侧、动力循环侧的性能,揭示系统集热-蓄热-热功转化之间的相互匹配特性规律,综合分析比较不同集热器、储热工质、动力循环组成的聚光太阳能SCO_(2)热发电系统的全年发电量和年均光-电转化效率,并对系统参数进行优化设计。结果表明:与线性菲涅尔式、槽形抛物面式聚光方式相比,塔式聚光方式的集热量受季节影响小,单位面积上全年集热量最高,全年集热效率约43%;增大高温储罐工质温度或降低低温储热罐工质温度能增大系统年发电量与年均光-电转化效率;采用塔式集热、NaCl-KCl-MgCl_(2)高温熔融盐、再压缩式超临界CO_(2)循环的聚光太阳能热发电系统具有最佳热力学性能。

关键词：太阳能热发电超临界CO_(2)循环热力学性能优化设计

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Enhancing air traffic operational efficiency by reducing network scale

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Aerospace Traffic and Safety 2024年第1期1卷 10-19页

作者： Tianyu Zhao Jose Escribano-Macias Mingwei Zhang Shenghao Fu Yuxiang Feng Mireille Elhajj Arnab Majumdar Panagiotis Angeloudis Washington Yotto Ochieng Centre for Transport Engineering and Modelling Imperial College LondonLondon SW72AZUnited Kingdom State Key Laboratory of Air Traffic Management System Nanjing 210007China Astra-Terra Limited LondonUnited Kingdom

The growing demand for air travel has led to the saturation of air traffic *** methods of adding routes to alleviate congestion and reduce delays may not achieve the desired effect and even degrade system *** this paper,we explore the application of Braess’s Paradox in the reduction of air traffic *** counterintuitive phenomenon shows that adding new connections to a network can actually increase the overall network *** study uses Hidden Markov methods and the Viterbi algorithm to match air traffic flow with routes,a machine learning approach and a mathematical method to construct cost functions for flight time and traffic volume,and finally uses genetic algorithm and the A*algorithm to detect Braess’s Paradox *** uses ADS-B data from the busy month of July 2019 for a case study of the air traffic network over the UK *** results show that Braess’s Paradox is also applicable to multi-flight level air route *** such network edges can improve system *** one day’s case,the total flight time of the day’s traffic volume decreased from 11509.24 minutes to 10459.97 *** equates to an average savings of 4.99 minutes of flight time per flight,which is significant in controlling delay performance.

关键词： Air traffic network Braess's paradox Genetic algorithm

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地震数据时频分析的W变换及其改进方法

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石油勘探与开发 2024年第4期51卷 774-782页

作者：王仰华饶莹赵振聪英国帝国理工大学资源地球物理学院英国伦敦SW72AZ 中国地质大学(北京) 北京100083 中国石油大学(北京)地球物理学院北京102249

针对常规线性时频分析方法无法同时达到时间域和频率域上的高分辨率和能量聚焦,尤其在低频区域分辨率较差的问题,为提高线性时频分析方法在低频区域的分辨率,提出了W变换方法,在线性变换中引入瞬时频率参数,构建与地震数据瞬时频率相匹... 详细信息

针对常规线性时频分析方法无法同时达到时间域和频率域上的高分辨率和能量聚焦,尤其在低频区域分辨率较差的问题,为提高线性时频分析方法在低频区域的分辨率,提出了W变换方法,在线性变换中引入瞬时频率参数,构建与地震数据瞬时频率相匹配的分析时窗。将W变换方法与典型的非线性时频分析方法——魏格纳-维利分布(WVD)进行了对比。WVD方法展示的是时间-频率域中的能量分布,明确指示子波的时间重心和频率重心,而W变换中由于引入了任意时间位置所对应的瞬时频率作为变换参数,所展示的时间-频率谱因而也具有明确的能量聚焦重心,因此,W变换与WVD方法具有直接对标意义。分析了近年来W变换的3种改进方法的发展状况,详细阐述从常规W变换、谐变时窗W变换、分数阶W变换、直到线性正则W变换的发展和演进。通过W变换在河道砂体识别和溶洞检测方面的3个应用实例,验证W变换可以提高时间-频率谱的分辨率与能量聚焦。

关键词：时频分析匹配追踪魏格纳变换 W变换能量聚焦分辨率

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Theoretical study of superradiant masing with solid-state spins at room temperature

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 38-47页

作者： Qilong Wu Yuan Zhang Hao Wu Shi-Lei Su Kai-Kai Liu Mark Oxborrow Chong-Xin Shan Klaus Mølmer Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China Institute of Quantum Materials and Physics Henan Academy of SciencesZhengzhou 450046China Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Academy of Quantum Information Sciences Beijing 100193China Department of Materials Imperial College LondonLondon SW72AZUK Niels Bohr Institute University of CopenhagenCopenhagen 2100Denmark

Steady-state superradiance and superradiant lasing attract significant attentions in the field of optical lattice clocks,but have not been achieved yet due to the technical challenges and atom loss *** this article,we propose that their counter-part may be observed in the microwave domain with solid-state spins,i.e.,nitrogen-vacancy center spins and pentacene molecular spins,coupled to microwave resonator at room temperature with realistic technical *** validate our proposal,we investigate systematically the system dynamics and steady-state by solving quantum master equations for the multi-level and multi-process dynamics of trillions of *** calculations show that the superradiant Rabi oscillations occur firstly due to transitions among different Dicke states,and the subsequent continuous-wave superradiant masing can achieve a linewidth well below *** work may guide further exploration of transient and steady-state superradiant masing with the mentioned and other solid-state spins *** ultra-narrow linewidth may find applications in deep-space communications,radio astronomy and high-precision metrology.

关键词： solid-state spins superradiance maser

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Analysis of the Innovative Path of History Teaching from an Artistic Perspective

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Journal of Contemporary Educational Research 2024年第5期8卷 218-222页

作者： Jiahui Yuan Shushu Tian Fengshuo Zhang North China University of Water Resources and Electric Power Zhengzhou 450000Henan ProvinceChina University of Perpetual Help System DALTA Manila 1226Philippines Royal College of Art London SW72EUUK

This paper discusses the innovative ways of history teaching in depth from the unique perspective of *** analyzing how artistic elements can effectively enrich teaching means and contents,it reveals the important value of art in history teaching for the improvement of students’comprehensive literacy and further explores the role of art in promoting the modern transformation of history *** the same time,the article also focuses on the challenges faced in practice,such as the lack of artistic qualities among teachers,the difficulties in integrating art and history,and the differences in students’*** cope with these challenges,the article proposes specific implementation strategies,including the integration of diversified art resources,innovative teaching methods and approaches,and the construction of a scientific and reasonable evaluation mechanism,aiming to comprehensively optimize the effectiveness of history teaching and further stimulate students’potential for all-round development.

关键词： History teaching Artistic perspective Comprehensive literacy Modernization and transformation

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