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An electromagnetic simulation assisted small signal modeling method for InP double-heterojunction bipolar transistors

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Chinese Physics B 2022年第6期31卷 717-724页

作者： Yanzhe Wang Wuchang ding Yongbo Su Feng yang Jianjun ding Fugui zhou Zhi Jin School of Microelectronics University of Chinese Academy of SciencesBeijing 100049China High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China

We present a convenient and practical electromagnetic(EM)assisted small-signal model extraction method for InP double-heterojunction bipolar transistors(DHBTs).Parasitic parameters of pad and electrode fingers are extracted by means of 3D EM *** simulations with a new excitation scheme are closer to the actual on-wafer measurement *** simulation settings are calibrated by comparing measurement and simulation of OPEN and SHORT structures.A simplerπ-type topology is proposed for the intrinsic model,in which the base-collector resistance Rμ,output resistance Rce are deleted,and a capacitance Cce is introduced to characterize the capacitive parasitic caused by the collector finger and emitter ground *** intrinsic parameters are all extracted by exact equations that are derived from rigorous *** method is characterized by its ease of implementation and the explicit physical meaning of extraction *** validations are performed at four biases for three InGaAs/InP HBT devices with 0.8×7μm,0.8×10μm and 0.8×15μm emitter,and quite good fitting results are obtained in the range of 0.1-50 GHz.

关键词： electromagnetic simulation InP double-heterojunction bipolar transistor parameter extraction small-signal modeling

Synthesis of Z-scheme g-C3N4 nanosheets/Ag3PO4 photocatalysts with enhanced visible-light photocatalytic performance for the degradation of tetracycline and dye

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Chinese Chemical Letters 2020年第1期31卷 71-76页

作者： Meng ding Juanjuan zhou Hongcen yang Ruya Cao Shouwei Zhang Minghui Shao Xijin Xu School of Physics and Technology University of JinanJi'nan 250022China College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China

Graphene-like C3N4/Ag3PO4 photocatalysts are synthesized by calcination and solutions precipitating *** obtained g-C3N4/Ag3PO4 composites display excellent photocatalytic activity for the degradation of methylene orange(MO),rhodamine B(RhB)and tetracycline(TC)under visible light *** solutions containing RhB(10 mg/L)and MO(10 mg/L)can be efficiently degraded within15 min and 30 ***,nearly 80%of TC(50 mg/L)is degraded within 20 *** are much better than those of pure g-C3N4 nanosheets and Ag3PO4,implying that strong interaction and reasonable energy band alignment in the contact interface can effectively transfer the ***,the g-C3N4/Ag3PO4 composites exhibit the improved stability,and only a slight decrease is observed after three recycling ***,the impact of inorganic ions and PH values on the degradation performance is rather *** Z-scheme photocatalytic mechanism of the g-C3N4/Ag3PO4 composites based on the active species trapping experimental is *** work demonstrates the promising applications of the g-C3N4/Ag3PO4 composites in environmental issues.

关键词： g-C3N4/Ag3PO4 Tetracycline Photocatalytic activity Photocurrent Impedance

Coulomb focusing in attosecond angular streaking

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Light(Science & Applications) 2024年第11期13卷 2611-2619页

作者： Xiaokai Li Xiwang Liu Chuncheng Wang Shuai Ben Shengpeng zhou Yizhang yang Xiaohong Song Jing Chen Weifeng yang Dajun ding Institute of Atomic and Molecular Physics and Advanced Light Field and Modern Medical Treatment Science and Technology Innovation Center of Jilin ProvinceJilin UniversityChangchun 130012China School of Physics and Optoelectronic Engineering Hainan UniversityHaikou 570228China Hefei National Laboratory and Hefei National Research Center for Physical Sciences at the Microscale and School of Physical SciencesUniversity of Science and Technology of ChinaHefei 230026China Center for Theoretical Physics Hainan UniversityHaikou 570228China

Angular streaking technique employs a close-to-circularly polarized laser pulse to build a mapping between the instant of maximum ionization and the most probable emission angle in the photoelectron momentum distribution,thereby enabling the probe of laser-induced electron dynamics in atoms and molecules with attosecond temporal ***,through the jointed experimental observations and improved Coulombcorrected strong-field approximation statistical simulations,we identify that electrons emitted at different initial ionization times converge to the most probable emission angle due to the previously-unexpected Coulomb focusing triggered by the nonadiabatic laser-induced electron *** reveal that the Coulomb focusing induces the observed nonintuitive energy-dependent trend in the angular streaking measurements on the nonadiabatic tunneling,and that tunneling dynamics under the classically forbidden barrier can leave fingerprints on the resulting *** findings have significant implications for the decoding of the intricate tunneling dynamics with attosecond angular streaking.

关键词： angular tunneling thereby

Physical,mechanical and thermal properties of vacuum sintered HUST-1 lunar regolith simulant

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International Journal of Mining Science and Technology 2024年第9期34卷 1243-1257页

作者： Wenbin Han Yan zhou Lixiong Cai Cheng zhou Lieyun ding National Center of Technology Innovation for Digital Construction Huazhong University of Science and TechnologyWuhan 430074China School of Civil and Hydraulic Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan 430070China

Establishing a base on the Moon is one of the new goals of human lunar exploration in recent *** lunar regolith is one of the most potential building materials for lunar *** physical,mechanical and thermal properties of sintered lunar regolith are vital performance indices for the structural design of a lunar base and analysis of many critical mechanical and thermal *** this study,the HUST-1 lunar regolith simulant(HLRS)was sintered at 1030,1040,1050,1060,1070,and 1080℃.The effect of sintering temperature on the compressive strength was investigated,and the exact value of the optimum vacuum sintering temperature was determined between 1040 and 1060℃.Then,the microstructure and material composition of vacuum sintered HLRS at different temperatures were *** was found that the sintering temperature has no significant effect on the mineral composition in the temperature range of 1030-1080℃.Besides,the heat capacity,thermal conductivity,and coefficient of thermal expansion(CTE)of vacuum sintered HLRS at different temperatures were *** heat capacity of sintered samples increases with the increase of test temperature within the temperature range from-75 to 145℃.Besides,the thermal conductivity of the sintered sample is proportional to ***,the two temperatures of 1040 and 1050℃were selected for a more detailed study of mechanical *** results showed that compressive strength of sintered sample is much higher than tensile *** study reveals the effects of sintering temperature on the physical,mechanical and thermal properties of vacuum sintered HLRS,and these material parameters will provide support for the construction of future lunar bases.

关键词： Lunar base Lunar regolith simulant Vacuum sintering Physical properties Mechanical properties Thermal properties

Adjustable robust low-carbon dispatch for interconnected power systems in Northeast Asian countries

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Global Energy Interconnection 2020年第6期3卷 511-520页

作者： Ming Qu Tao ding Qingrun yang Yuanbing zhou Yun Zhang Ya Wen School of Electrical Engineering Xi'an Jiaotong UniversityXi'an710049P.R.China Global Energy Interconnection Development and Cooperation Organization Beijing 100031P.R.China

Interconnected power systems that link several countries and fully utilize their individual resources in a complementary manner are becoming increasingly *** these systems enhanee accommodation of renewable energy,they also represent a move toward low-carbon and low-emissi on power *** this paper,a low-carb on dispatch model is proposed to coo rd i nate the gen erati on output betwee n several coun tries where the carb on emissi on constraint is a *** adjustable robust optimization approach is used to find the optimal solution under the worst-case scenario to address the uncertainties associated with renewable energy resources.A specific constraint is that the area control error for each country should be ***,a reformation using participation factors is presented to simplify the proposed robust dispatch *** results for practical interconnected power systems in northeast Asian countries verify the effectiveness of the proposed model.

关键词： Low-carbon economic dispatch Northeast Asia en ergy in tercon necti on Adjustable robust optimization

Lira-YOLO: a lightweight model for ship detection in radar images

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Journal of Systems Engineering and Electronics 2020年第5期31卷 950-956页

作者： zhou Long WEI Suyuan CUI Zhongma FANG Jiaqi yang Xiaoting ding Wei Beijing Institute of Remote Sensing Equipment Beijing 100854China Xi’an High-tech Research Institute Xi’an 710025China School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

For the detection of marine ship objects in radar images, large-scale networks based on deep learning are difficult to be deployed on existing radar-equipped devices. This paper proposes a lightweight convolutional neural network, LiraNet, which combines the idea of dense connections, residual connections and group convolution, including stem blocks and extractor *** designed stem block uses a series of small convolutions to extract the input image features, and the extractor network adopts the designed two-way dense connection module, which further reduces the network operation complexity. Mounting LiraNet on the object detection framework Darknet, this paper proposes Lira-you only look once(Lira-YOLO), a lightweight model for ship detection in radar images, which can easily be deployed on the mobile devices. Lira-YOLO's prediction module uses a two-layer YOLO prediction layer and adds a residual module for better feature delivery. At the same time, in order to fully verify the performance of the model, mini-RD, a lightweight distance Doppler domain radar images dataset, is constructed. Experiments show that the network complexity of Lira-YOLO is low, being only 2.980 Bflops, and the parameter quantity is smaller, which is only 4.3 MB. The mean average precision(mAP) indicators on the mini-RD and SAR ship detection dataset(SSDD) reach 83.21% and 85.46%, respectively,which is comparable to the tiny-YOLOv3. Lira-YOLO has achieved a good detection accuracy with less memory and computational cost.

关键词： lightweight radar images ship detection you only look once(YOLO)

Overexpression of vascular endothelial growth factor enhances the neuroprotective effects of bone marrow mesenchymal stem cell transplantation in ischemic stroke

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Neural Regeneration Research 2023年第6期18卷 1286-1292页

作者： Cui Liu Zhi-Xiang yang Si-Qi zhou ding ding Yu-Ting Hu Hong-Ning yang Dong Han Shu-Qun Hu Xue-Mei Zong Institute of Emergency Rescue Medicine Emergency Centerthe Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Emergency Department of Affiliated Lianyungang Hospital of Xuzhou Medical University/The First People’s Hospital of Lianyungang LianyungangLianyungangJiangsu ProvinceChina Laboratory of Emergency Medicine Second Clinical Medical College of Xuzhou Medical UniversityXuzhou Medical UniversityXuzhouJiangsu ProvinceChina Key Laboratory of Brain Diseases Bioinformation Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina

Although bone marrow mesenchymal stem cells(BMSCs)might have therapeutic potency in ischemic stroke,the benefits are *** current study investigated the effects of BMSCs engineered to overexpress vascular endothelial growth factor(VEGF)on behavioral defects in a rat model of transient cerebral ischemia,which was induced by middle cerebral artery ***-BMSCs or control grafts were injected into the left striatum of the infarcted hemisphere 24 hours after *** found that compared with the stroke-only group and the vehicle-and BMSCs-control groups,the VEGF-BMSCs treated animals displayed the largest benefits,as evidenced by attenuated behavioral defects and smaller infarct volume 7 days after ***,VEGF-BMSCs greatly inhibited destruction of the blood-brain barrier,increased the regeneration of blood vessels in the region of ischemic penumbra,and reducedneuronal degeneration surrounding the infarct *** mechanistic studies showed that among all transplant groups,VEGF-BMSCs transplantation induced the highest level of brain-derived neurotrophic *** results suggest that BMSCs transplantation with vascular endothelial growth factor has the potential to treat ischemic stroke with better results than are currently available.

关键词： bone marrow mesenchymal stem cell brain-derived neurotrophic factor CD31 microtubule associated protein 2 middle cerebral artery occlusion stroke transplantation vascular endothelial growth factor

NbTaO_(x)界面修饰用于高效钙钛矿太阳电池

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半导体技术 2025年第1期50卷 17-22页

作者：蒋君杨攻旅杨雨帆王梦辉李绿洲胡宏伟袁宁一丁建宁常州大学材料科学与工程学院江苏常州213164 常州大学江苏省光伏科学与工程协同创新中心江苏常州213164 扬州大学扬州碳中和技术创新研究中心江苏扬州225009 江苏大学机械工程学院江苏镇江212013

界面修饰能够调控钙钛矿太阳电池(PSC)的埋底界面缺陷,为提高PSC的光电转换效率与稳定性,在电子传输层和钙钛矿层之间引入NbTaO_(x)界面修饰层,并研究其对正置结构的PSC光伏性能的影响。将含乙醇铌和乙醇钽的乙醇溶液旋涂在致密的SnO_(2... 详细信息

界面修饰能够调控钙钛矿太阳电池(PSC)的埋底界面缺陷,为提高PSC的光电转换效率与稳定性,在电子传输层和钙钛矿层之间引入NbTaO_(x)界面修饰层,并研究其对正置结构的PSC光伏性能的影响。将含乙醇铌和乙醇钽的乙醇溶液旋涂在致密的SnO_(2)电子传输层表面,待其缓慢水解,经退火即可在SnO_(2)薄膜表面原位生长得到NbTaO_(x)修饰层。结合荧光光谱、水接触角测试和紫外光电子能谱等探究其影响机制。测试结果表明,基于NbTaO_(x)界面修饰层的PSC光电转换效率由19.14%提升至21.51%。NbTaO_(x)不仅可以提升电子传输能力,减少载流子在界面处的复合,且有利于钙钛矿层的沉积,提高钙钛矿薄膜的结晶质量。

关键词：界面修饰电子传输钙钛矿太阳电池(PSC) 高效率稳定性

Focus-sensitive relation disambiguation for implicit discourse relation detection

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Frontiers of Computer Science 2019年第6期13卷 1266-1281页

作者： Yu HONG Siyuan ding yang XU Xiaoxia JIANG Yu WANG Jianmin YAO Qiaoming ZHU Guodong zhou Natural Language Processing Lab School of Computer Science&TechnologySoochow UniversitySuzhou 215006China Science and Technology on Information Systems Engineering Laboratory Nanjing 210007China

We study implicit discourse relation detection,which is one of the most challenging tasks in the field of discourse *** specialize in ambiguous implicit discourse relation,which is an imperceptible linguistic phenomenon and therefore difficult to identify and *** this paper,we first create a novel task named implicit discourse relation disambiguation(IDRD).Second,we propose a focus-sensitive relation disambiguation model that affirms a truly-correct relation when it is triggered by focal sentence *** addition,we specifically develop a topicdriven focus identification method and a relation search system(RSS)to support the relation ***,we improve current relation detection systems by using the disambiguation *** on the penn discourse treebank(PDTB)show promising improvements.

关键词： Implicit discourse relation focus-sensitive implicit relation disambiguation topic-driven focus identification