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Visualization of Interaction of Laser Pulse-Gastric Tumor by COMSOL Based on Finite Element Analysis

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Visualization of Interaction of Laser Pulse-Gastric Tumor by...

Selective oxidation of methanol to dimethoxymethane over V_2O_5/Ti O_2–Al_2O_3 catalysts

作者： Xianlin Song Ao Teng Jianshuang Wei Hao Chen Yang Zhao Jianheng Chen Fangwei Liu Qianxiang Wan Guoning Huang Lingfang Song Aojie Zhao Bo Li Zihao Li Qiming He Jinhong Zhang School of Information Engineering Nanchang University Institute for Advanced Study Nanchang University Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology moe key laboratory of Biomedical Photonics of Ministry of Education Department of Biomedical EngineeringHuazhong University of Science and Technology School of Software Nanchang University Nanchang Normal University

Photoacoustic imaging is an emerging technology based on the photoacoustic effect that has developed rapidly in recent years. It combines the high contrast of optical imaging and the high penetration and high resolution of acoustic imaging. As a non-destructive biological tissue imaging technology, photoacoustic imaging has important application value in the field of biomedicine. With its high efficiency bioimaging capabilities and excellent biosafety performance, it has been favored by researchers. The visualization of photoacoustic imaging has great research significance in the early diagnosis of some diseases, especially tumors. In photoacoustic imaging, light transmission and thermal effects are important processes. This article is based on COMSOL software and uses finite element analysis to construct a physical model for simulation. Through laser pulses into the stomach tissue containing tumor, the physical process of light transmission and biological heat transfer was studied, and a photothermal model composed of two physical fields was built, and finally a series of visualization graphics were obtained. This work has certain theoretical guiding significance for further promoting the application of photoacoustic imaging in the field of biomedicine.

关键词： Photoacoustic Imaging Finite Element Analysis Gastric Tumor Biological Heat Transfer

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Science Bulletin 2015年第11期60卷 1009-1018,I0007页

作者：王拓孟亚利曾亮巩金龙 key laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin University Collaborative Innovation Center of Chemical Science and Engineering

This paper describes the effect of the prepara- tion method of binary oxide supports （TiO2-Al2O3） on catalytic performance of V2O5/TiO2-Al2O3 catalysts for methanol selective oxidation to dimethoxymethane （DMM）. The TiO2-A1203 supports are synthesized by a number of methods including mechanical mixing, ball milling, precipitation, co-precipitation, and sol-gel method, which is followed by incipient wetness impregnation to produce V2O5/TiO2-Al2O3 catalysts. Among these samples, the V2O5/TiO2-Al2O3 catalyst prepared by the sol-gel method has the best catalytic performance with a maximum methanol conversion of 48.9 % and a high DMM selectivity of 89.9 % at 393 K, showing superior performance than V2O5/TiO2 and V2O5/Al2O3. The excellent catalytic performance of V2O5/TiO2-Al2O3 is attributed to the effective interaction between the active component and the mixed support. Such interaction changes the chemical states of supported active V components, produces an increased amount of V^4＋ species, and facilitates the electron transfer between support and active component. Additionally, the incorporation of titanium cation into the alumina structure could also help produce an appropriate amount of acidic sites, which increases the DMM selectivity. The coordinated environment of the dispersed vanadia on TiO2-Al2O3 mixed support improves the catalytic efficiency on methanol oxidation to DMM.

关键词： Methanol selective oxidation Dimethoxymethane V2O5/TiO2-Al2O3 Binary oxide support

A 2.16 eV bandgap polymer donor gives 16%power conversion efficiency

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Science Bulletin 2020年第3期65卷 179-181页

作者： Tan Wang Jianqiang Qin Zuo Xiao Xianyi Meng Chuantian Zuo Bin Yang Hairen Tan Junliang Yang Shangfeng Yang Kuan Sun Suyuan Xie Liming Ding Department of Chemistry Xiamen UniversityXiamen 361005China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China moe key laboratory of Low-grade Energy Utilization Technologies and Systems School of Energy and Power EngineeringChongqing UniversityChongqing 400044China CSIRO Manufacturing Bag 10Clayton SouthVictoria 3169Australia College of Materials Science and Engineering Hunan UniversityChangsha 410082China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210093China School of Physics and Electronics Central South UniversityChangsha 410083China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

Nowadays,wide-bandgap(WBG)copolymers attract great attention in the field of organic photovoltaics[1].They are ideal electron-donating partners for low-bandgap small molecule acceptors[2-12].With good energy levels matching,the blend of WBG copolymer donor and small molecule acceptor can harvest most of the sunlight and deliver high power conversion efficiencies(PCEs)in solar *** higher than 16%have been achieved[13-15].WBG copolymers especially those with ultra-wide bandgaps(i.e.,optical bandgap(Eg opt)>2.07 eV,absorption onsethighly efficient ultra-WBG copolymers is *** this work,we use fluorine-and alkoxyl-substituted benzene(FAB)as the building block to construct ultra-WBG copolymer donors.

关键词： ORGANIC SOLAR-CELLS COPOLYMERS

efficiency of Removing Sulfur Dioxide in the Air by Non-Thermal Plasma Along with the Application of the Magnetic Field

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Plasma Science and Technology 2005年第5期7卷 3073-3077页

作者：柳晶晶王小华袁兴成荣命哲 State key Lab of Electrical Insulation and Power Equipment Xi'an Jiaotong University

The non-thermal plasma created by high voltage pulsed power supply can be used to remove sulfur dioxide in the air, but how to increase the removing efficiency is not clear. It is novel to apply the magnetic field in removing SO2 as discussed in this paper. The mechanisms of removing sulfur dioxide by non-thermal plasma along with the application of the magnetic field are analyzed, and the related factors affecting the removal efficiency, such as the magnitude of pulsed voltage, the polarity of the pulse, the layout of the discharge electrode, especially the magnetic field are experimentally investigated. It can be concluded that the purification efficiency is improved significantly by applying the magnetic field.

关键词： non-thermal plasma magnetic field removal efficiency

Study of BESⅢ trigger efficiencies with the 2018 J/ψ data

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Chinese Physics C 2021年第2期45卷 52-59页

作者：麦迪娜 M.N.Achasov P.Adlarson S.Ahmed M.Albrecht R.Aliberti A.Amoroso 安美儒安琪白旭红白羽 O.Bakina R.Baldini Ferroli I.Balossino 班勇 K.Begzsuren N.Berger M.Bertani D.Bettoni F.Bianchi J.Bloms A.Bortone I.Boyko R.A.Briere 蔡浩蔡啸 A.Calcaterra 曹国富曹宁 S.A.Cetin 常劲帆常万玲 G.Chelkov 陈端友陈刚陈和生陈玛丽陈申见陈旭荣陈元柏陈卓俊成伟帅 G.Cibinetto F.Cossio 崔小非代洪亮戴鑫琛 A.Dbeyssi R.E.de Boer D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇董超董静董燎原董明义董翔杜书先范玉兰方建房双世方易 R.Farinelli L.Fava F.Feldbauer G.Felici 封常青 J.H.Feng M.Fritsch 傅成栋高雅高扬高原宁高勇贵 I.Garzia 葛潘婷耿聪 E.M.Gersabeck A Gilman K.Goetzen L.Gong 龚文煊 W.Gradl M.Greco 谷立民顾旻皓顾珊顾运厅关春懿郭爱强郭立波郭如盼 Y.P.Guo A.Guskov 韩婷婷韩文颖郝喜庆 F.A.Harris H Hüsken 何康林 F.H.Heinsius C.H.Heinz T.Held 衡月昆 C.Herold M.Himmelreich T.Holtmann 侯颖锐侯治龙胡海明 J.F.Hu 胡涛胡誉黄光顺黄麟钦黄性涛黄燕萍黄震 T.Hussain W. Ikegami Andersson W.Imoehl M.Irshad S.Jaeger S.Janchiv 纪全姬清平季晓斌季筱璐姜侯兵江晓山焦健斌焦铮金山金毅 T.Johansson N.Kalantar-Nayestanaki 康晓珅 R.Kappert M.Kavatsyuk 柯百谦 I.K.Keshk A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.G.Kurth W.Kühn J.J.Lane J.S.Lange P.Larin A.Lavania L.Lavezzi 雷祚弘 H.Leithoff M.Lellmann T.Lenz 李翠李春花李澄李德民李飞李刚李慧李贺李海波李惠静李井文 J.Q.Li 李静舒李科李龙科李蕾李培荣栗帅迎李卫东李卫国李旭红李晓玲李紫源梁昊梁浩梁浩梁勇飞梁羽铁廖龙洲 J.Libby 林创新刘北江刘春秀 Institute of high Energy Physics G.I.Budker Institute of Nuclear Physics SB RAS (BINP) Also at the Novosibirsk State University Zhejiang University Helmholtz Institute Mainz Bochum Ruhr-University Johannes Gutenberg University of Mainz Xinyang Normal University Lanzhou University Sun Yat-Sen University University of Turin University of Eastern Piedmont INFN University of Muenster Wilhelm-Klemm-Str.9 State key laboratory of Particle Detection and Electronics Joint Institute for Nuclear Research INFN Laboratori Nazionali di Frascati INFN Sezione di Ferrara Peking University State key laboratory of Nuclear Physics and Technology Peking University Institute of Physics and Technology University of Science and Technology of China Carnegie Mellon University Zhengzhou University University of Jinan University of Hawaii the Moscow Institute of Physics and Technology Central China Normal University Nanjing Normal University Institute of Modern Physics Hunan University School of Physics and Electronics Hunan University Nanjing University Liaoning Normal University the Novosibirsk State University Tsinghua University Uppsala University University of Ferrara University of Oxford University of South China GSI Helmholtzcentre for Heavy Ion Research GmbH Beihang University Guangxi University Indiana University Liaoning University Shandong Normal University Fudan University key laboratory of Nuclear Physics and Ion-beam Application (moe) and Institute of Modern Physics Shandong University Henan Normal University University of Minnesota Ankara University Istanbul Bilgi University Uludag University Near East University Goethe University Frankfurt Southeast University Wuhan University Italy University of Eastern Piedmont Huangshan College University of Muenster University of Manchester Shanxi Normal University Justus-Liebig-Universitaet Giessen Ⅱ.Physikalisches Institut Istanbul Arel University Indian Institute of Technology Madras Qufu Normal University key laboratory of Nuclear Physics and Ion-beam Application (moe) and Instit

Using a dedicated data sample taken in 2018 on the J/ψ peak, we perform a detailed study of the trigger efficiencies of the BESⅢ detector. The efficiencies are determined from three representative physics processes,namely Bhabha scattering, dimuon production and generic hadronic events with charged particles. The combined efficiency of all active triggers approaches 100% in most cases, with uncertainties small enough not to affect most physics analyses.

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31.38 Gb/s GaN-based LED array visible light communication system enhanced with V-pit and sidewall quantum well structure

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Opto-Electronic Science 2023年第5期2卷 12-24页

作者： Zengyi Xu Wenqing Niu Yu Liu Xianhao Lin Jifan Cai Jianyang Shi Xiaolan Wang Guangxu Wang Jianli Zhang Fengyi Jiang Zhixue He Shaohua Yu Chao Shen Junwen Zhang Nan Chi key laboratory for the Information Science of Electromagnetic Waves(moe) Department of Communication Science and EngineeringFudan UniversityShanghai 200433China National Institute of LED on Silicon Substrate Nanchang UniversityNanchang 330096China Shanghai Engineering Research Center of Low-Earth-Orbit Satellite Communication and Applications and Shanghai Collaborative Innovation Center of Low-Earth-Orbit Satellite Communication TechnologyShanghai 200433China Peng Cheng laboratory Shenzhen 518055China

Although the 5G wireless network has made significant advances,it is not enough to accommodate the rapidly rising requirement for broader bandwidth in post-5G and 6G *** a result,emerging technologies in higher frequencies including visible light communication(VLC),are becoming a hot *** particular,LED-based VLC is foreseen as a key enabler for achieving data rates at the Tb/s level in indoor scenarios using multi-color LED arrays with wavelength division multiplexing(WDM)*** paper proposes an optimized multi-color LED array chip for high-speed VLC *** long-wavelength GaN-based LED units are remarkably enhanced by V-pit structure in their efficiency,especially in the“yellow gap”region,and it achieves significant improvement in data rate compared with earlier *** work investigates the V-pit structure and tries to provide insight by introducing a new equivalent circuit model,which provides an explanation of the simulation and experiment *** the final test using a laboratory communication system,the data rates of eight channels from short to long wavelength are 3.91 Gb/s,3.77 Gb/s,3.67 Gb/s,4.40 Gb/s,3.78 Gb/s,3.18 Gb/s,4.31 Gb/s,and 4.35 Gb/s(31.38 Gb/s in total),with advanced digital signal processing(DSP)techniques including digital equalization technique and bit-power loading discrete multitone(DMT)modulation format.

关键词： GaN-based LED LED array VLC V-pit sidewall quantum well high-frequency response

Scattering exceptional point in the visible

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Light(Science & Applications) 2023年第10期12卷 2228-2235页

作者： Tao He Zhanyi Zhang Jingyuan Zhu Yuzhi Shi Zhipeng Li Heng Wei Zeyong Wei Yong Li Zhanshan Wang Cheng-Wei Qiu Xinbin Cheng moe key laboratory of Advanced Micro-Structured Materials Shanghai 200092China Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 200092China Shanghai Frontiers Science Center of Digital Optics Shanghai 200092China Shanghai Professional Technical Service Platform for Full-Spectrum and high-Performance Optical Thin Film Devices and Applications Shanghai 200092China Department of Electronic Science and Technology Tongji UniversityShanghai 201804China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Institute of Acoustics School of Physics Science and EngineeringTongji UniversityShanghai 200092China

Exceptional point (EP) is a special degeneracy of non-Hermitian systems. One-dimensional transmission systems operating at EPs are widely studied and applied to chiral conversion and sensing. Lately, two-dimensional systems at EPs have been exploited for their exotic scattering features, yet so far been limited to only the non-visible waveband. Here, we report a universal paradigm for achieving a high-efficiency EP in the visible by leveraging interlayer loss to accurately control the interplay between the lossy structure and scattering lightwaves. A bilayer framework is demonstrated to reflect back the incident light from the left side ( | r_(−1) | >0.999) and absorb the incident light from the right side ( | r_(+1) | < 10^(–4)). As a proof of concept, a bilayer metasurface is demonstrated to reflect and absorb the incident light with experimental efficiencies of 88% and 85%, respectively, at 532 nm. Our results open the way for a new class of nanoscale devices and power up new opportunities for EP physics.

关键词： visible exceptional incident

2D/2D atomic double-layer WS_(2)/Nb_(2)O_(5)shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H_(2)evolution

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Chinese Chemical Letters 2021年第10期32卷 3128-3132页

作者： Bo Lin Hao Chen Yao Zhou Xiao Luo Dan Tian Xiaoqing Yan Ruihuan Duan Jun Di Lixing Kang Aimin Zhou Guidong Yang Yonghui Li Jiadong Zhou Zheng Liu Fucai Liu School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Wuhan Second Ship Design and Research Institute Wuhan 430200China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China XJTU-Oxford International Joint laboratory for Catalysis School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi’an 710049China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Department of Physics and Tianjin key laboratory of Low Dimensional Materials Physics and Preparing Technology School of ScienceTianjin UniversityTianjin 300350China key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China

Low-efficiency charge transfer is a critical factor to limit the photocatalytic H_(2)evolution activity of semiconductor *** interface design is a promising approach to achieve high chargetransfer efficiency for ***,a new 2 D/2 D atomic double-layer WS_(2)/Nb_(2)O_(5)shell/core photocatalyst(DLWS/Nb_(2)O_(5))is *** atom-resolved HAADF-STEM results unravel the presence of an unusual 2 D/2 D shell/core interface in DLWS/Nb_(2)O_(5).Taking advantage of the advanced femtosecond-resolved ultrafast TAS spectra,the average lifetime of charge carriers for DLWS/Nb_(2)O_(5)(180.97 ps)is considerably shortened as compared to that of Nb_(2)O_(5)(230.50 ps),strongly indicating that the 2 D/2 D shell/core interface enables DLWS/Nb_(2)O_(5)to achieve ultrafast charge transfer from Nb_(2)O_(5)to atomic double-layer WS_(2),thus yielding a high photocatalytic H_(2)evolution rate of 237.6 mmol/h,up to10.8 times higher than that of pure Nb_(2)O_(5)*** study will open a new window for the development of high-efficient photocatalytic systems through the interface design.

关键词： 2D/2D shell/core interface Atomic double-layer WS_(2) Nb_(2)O_(5)nanosheet Charge transfer Photocatalytic H_(2)evolution

Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb

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Science China Materials 2022年第5期65卷 1353-1361页

作者： Jiwu Xin Wang Li Sihui Li Yang Tao Tian Xu Yubo Luo Qinghui Jiang Lei Wei Junyou Yang State key laboratory of Materials Processing and Die and Mould Technology Huazhong University of Science and TechnologyWuhan 430074China School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

InSb is a narrow-bandgap semiconductor with a zinc blende structure and has been wildly applied in photodetectors, infrared thermal imaging, and Hall devices. The facts of decent band structure, ultrahigh electron mobility,and nontoxic nature indicate that InSb may be a potential mid-temperature thermoelectric material. The critical challenges of InSb, such as high thermal conductivity and small Seebeck coefficient, have induced its ultrahigh lattice thermal conductivity, and thus low ZT values. In view of this, we have developed a competitive strategy typified by the cost-efficient nanocompositing of z wt% QSe_(2)(Q = Sn, W). Specifically, the Q_(In)^(+) and Se_(Sb)^(+) point defects were introduced in the In Sb system by nanocompositing the vested two-dimensional layered QSe_(2). In addition, the enlarged valence band maximum of intrinsic WSe_(2)acted as ladders can scatter a fair number of hole carriers, resulting in the relatively enhanced Seebeck coefficient of high temperature. Moreover, the disorderly distributed nanosheets/particles, and dislocations acting as obstacles can effectively delay the heat flow diffusion, inducing the strong scattering of thermal phonons. Consequently, an enhanced power factor of ~33.3 μW cm^(-1)K^(-2) and ZT value of~0.82 at 733 K have been achieved in the 3% WSe_(2)sample,companied with the engineering output power density ω_(max)~233 μW cm^(-1) and thermoelectric conversion efficiency η~5.2%. This artificially designed approach indicated by suited nanocompositing can integrate several engineering strategies such as point defects, nanoengineering, and energy filtering into one, providing a reference to optimize the thermoelectric performance of other thermoelectric systems.

关键词： thermoelectric InSb energy barrier WSe_(2)nanosheets output power density