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Self-Driven Photo-Polarized Water Molecule-Triggered Graphene-Based Photodetector

Research 2024年第2期2023卷 273-283页

作者： Shisheng Lin Chang Liu Xin Chen Yi Zhang Hongtao Lin xutao yu yujiao Bo Yanghua Lu College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027P.R.China Hangzhou Gelanfeng Technology Co.Ltd Hangzhou 310051P.R.China State Key Laboratory of Modern Optical Instrumentation Zhejang UniversityHangzhou 310027P.R.China Key Laboratory of Wide Bandgap Semiconductor Materials and Devices HCSemitek CorporationYiwu 322009P.R.China Smart Materials for Architecture Research Lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100P.R.China

Flowing water can be used as an energy source for generators,providing a major part of the energy for daily ***,water is rarely used for information or electronic ***,we present the feasibility of a polarized liquid-triggered photodetector in which polarized water is sandwiched between graphene and a *** to the polarization and depolarization processes of water molecules driven by photogenerated carriers,a photo-sensitive current can be repeatedly produced,resulting in a high-performance *** response wavelength of the photodetector can be fine-tuned as a result of the free choice of semiconductors as there is no requirement of lattice match between graphene and the *** zero voltage bias,the responsivity and specific detectivity of Gr/NaCl(0.5 M)W/N-GaN reach values of 130.7 mA/W and 2.3×10^(9)Jones under 350 nm illumination,***,using a polar liquid photodetector can successfully read the photoplethysmography signals to produce accurate oxygen blood saturation and heart *** with the commercial pulse oximetry sensor,the average errors of oxygen saturation and heart rate in the designed photoplethysmography sensor are~1.9%and~2.1%,*** study reveals that water can be used as a high-performance photodetector in informative industries.

关键词： polarization polarized saturation

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碳纤维对纳米偏高岭土再生混凝土抗折强度及微观结构影响试验研究

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复合材料科学与工程 2024年第1期 60-65页

作者：阎杰罗岩于旭涛王丽君谢军舒新前河北建筑工程学院土木工程学院张家口075000 中国矿业大学(北京)化学与环境工程学院北京100083

为了充分利用再生混凝土资源,采用碳纤维对纳米偏高岭土再生混凝土抗折强度进行改性,以不同碳纤维和纳米偏高岭土掺量作为变量制备再生混凝土,结合压汞法及扫描电镜研究再生混凝土孔隙结构及微观形貌特征,分析碳纤维对纳米偏高岭土再生... 详细信息

为了充分利用再生混凝土资源,采用碳纤维对纳米偏高岭土再生混凝土抗折强度进行改性,以不同碳纤维和纳米偏高岭土掺量作为变量制备再生混凝土,结合压汞法及扫描电镜研究再生混凝土孔隙结构及微观形貌特征,分析碳纤维对纳米偏高岭土再生混凝土的改性机理。结果表明:碳纤维对再生混凝土抗折强度增强效果显著,在不同纳米偏高岭土掺量下,碳纤维适配掺量有所不同,当纳米偏高岭土掺量为7%、10%、12%时,碳纤维最佳掺量分别为0.1%、0.15%、0.2%,当纳米偏高岭土掺量为10%,碳纤维掺量为0.15%时,抗折强度达到最大值,较普通再生混凝土强度增幅为59.1%;碳纤维的掺入细化了再生混凝土内部的孔隙结构,使有害孔和多害孔的比例降低,少害孔的比例增加;碳纤维在再生混凝土内部起到承载及阻裂作用,纳米偏高岭土的填充效应以及火山灰活性增强了界面过渡区的粘接强度,使碳纤维更能发挥其作用,进而促进再生混凝土强度的提高。

关键词：碳纤维纳米偏高岭土再生混凝土抗折强度微观结构复合材料

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Journal of Electronics(China) 2008年第5期25卷 685-688页

作者： Zhang Zaichen yu xutao Bi Guangguo （National Mobile Communications Research Lab Southeast University Nanjing 210096 China

In this letter,we propose a hybrid analog/digital detection algorithm,the Correlated In-terference Cancellation(CIC) algorithm,for Impulse Radio Ultra-WideBand(IR-UWB) *** CIC algorithm correlates received signal with its delayed versions in the analog domain and samples the correlation output at the symbol *** symbol rate samples are processed in the digital domain to perform interference ***,CIC works for high data rate systems with heavy In-terSymbol Interference(ISI).Simulation results show that CIC achieves good performance in typical UWB channels.

关键词： Impulse Radio Ultra-WideBand (IR-UWB) Correlated Interference Cancellation (CIC) Receiver

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Joint Link Allocation and Rate Assignment Algorithm for Multi-Channel Wireless Networks

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China Communications 2012年第9期9卷 96-106页

作者： yu xutao Fang Xin Zhang Zaichen State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 P. R. China College of Communication Engineering Hangzhou Dianzi University Hangzhou 310018 P. R. China State Key Laboratory of Mobile Communications Southeast University Nanjing 210096 P. R. China

This paper presents a link allocation and rate assignment algorithm for multi-channel wireless networks. The objective is to reduce network con-flicts and guarantee the fairness among links. We first design a new network model. With this net-work model, the multi-channel wireless network is divided into several subnets according to the num-ber of channels. Based on this, we present a link allocation algorithm with time complexity O（l^2）to al-locate all links to subnets. This link allocation algo-rithm adopts conflict matrix to minimize the network contention factor. After all links are allocated to subnets, the rate assignment algorithm to maximize a fairness utility in each subnet is presented. The rate assignment algorithm adopts a near-optirml al-gorithm based on dual decomposition and realizes in a distributed way. Simulation results demonstrate that, compared with IEEE 802.11b and slotted see-ded channel hopping algorithm, our algorithm de-creases network conflicts and improves the net-work throughput significantly.

关键词： multi-channel networks link allocation rate assignment conflict matrix fairness utilityfunction

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Interfacial Built-In Electric Field-Driven Direct Current Generator Based on Dynamic Silicon Homojunction

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Research 2020年第1期2020卷 935-943页

作者： Yanghua Lu Qiuyue Gao xutao yu Haonan Zheng Runjiang Shen Zhenzhen Hao Yanfei Yan Panpan Zhang yu Wen Guiting Yang Shisheng Lin College of Microelectronics College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China Wuxi Branch of Jiangsu Province Special Equipment Safety Supervision and Inspection Institute Wuxi 214071China State Key Laboratory of Space Power Technology Shanghai Institute of Space Power SourcesShanghai 200245China State Key Laboratory of Modern Optical Instrumentation Zhejiang UniversityHangzhou 310027China

Searching for light and miniaturized functional device structures for sustainable energy gathering from the environment is the focus of energy society with the development of the internet of *** proposal of a dynamic heterojunction-based direct current generator builds up new platforms for developing in situ ***,the requirement of different semiconductors in dynamic heterojunction is too complex to wide applications,generating energy loss for crystal structure ***,dynamic homojunction generators are explored,with the same semiconductor and majority carrier *** experiments reveal that the majority of carrier directional separation originates from the breaking symmetry between carrier distribution,leading to the rebounding effect of carriers by the interfacial electric ***,NN Si homojunction with different Fermi levels can also output the electricity with higher current density than PP/PN homojunction,attributing to higher carrier *** current density is as high as 214.0 A/m^(2),and internal impedance is as low as 3.6 kΩ,matching well with the impedance of electron ***,the N-i-N structure is explored,whose output voltage can be further improved to 1.3V in the case of the N-Si/Al2O3/N-Si structure,attributing to the enhanced interfacial *** approach provides a simple and feasible way of converting low-frequency disordered mechanical motion into electricity.

关键词： interfacial dynamic gathering

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Polarized Water Driven Dynamic PN Junction-Based Direct-Current Generator

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Research 2021年第1期2021卷 469-478页

作者： Yanghua Lu Yanfei Yan xutao yu Xu Zhou Sirui Feng Chi Xu Haonan Zheng Zunshan Yang Linjun Li Kaihui Liu Shisheng Lin College of Microelectronics College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics Collaborative Innovation Center of Quantum MatterSchool of PhysicsPeking UniversityBeijing 100871China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006China State Key Laboratory of Modern Optical Instrumentation Zhejiang UniversityHangzhou 310027China

There is a rising prospective in harvesting energy from the environment,as in situ energy is required for the distributed sensors in the interconnected information society,among which the water flow energy is the most potential candidate as a clean and abundant mechanical ***,for microscale and unordered movement of water,achieving a sustainable direct-current generating device with high output to drive the load element is still challenging,which requires for further ***,we propose a dynamic PN water junction generator with moving water sandwiched between two semiconductors,which outputs a sustainable direct-current voltage of 0.3 V and a current of 0.64μ*** mechanism can be attributed to the dynamic polarization process of water as moving dielectric medium in the dynamic PN water junction,under the Fermi level difference of two *** further demonstrate an encapsulated portable power-generating device with simple structure and continuous direct-current voltage output of 0.11 V,which exhibits its promising potential application in the field of wearable devices and the IoTs.

关键词： wear generating moving

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Comparison of Adaptive Simulation Observation Experiments of the Heavy Rainfall in South China and Sichuan Basin

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Advances in Atmospheric Sciences 2024年第11期41卷 2173-2191页

作者： Linbin HE Weiyi PENG yu ZHANG Shiguang MIAO Siqi CHEN Jiajing LI Duanzhou SHAO xutao ZHANG College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China Chinese Academy of Meteorology Sciences Beijing 100081China Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089China School of Marine Sciences Nanjing University of Information Science and TechnologyNanjing 210044China Dalian Marine Center Ministry of Nature Resources of the People's Republic of ChinaDalian 116001China

This study examines the effectiveness of adaptive observation experiments using the ensemble transformation sensitivity(ETS) method to improve precipitation forecasts during heavy rainfall events in South China and the Sichuan Basin. High-resolution numerical models are employed to simulate adaptive observations. By identifying the sensitive areas of key weather system positions 42 hours before heavy rainfall events, the adaptive observations improve the prediction of jet streams, strong winds, and shear lines, which are essential for accurate heavy rainfall forecasting. This improvement is reflected in both the precipitation structure and location accuracy within the verification region. In South China, targeted observations enhance rainfall predictions by improving water vapor transport. In the Sichuan Basin, adaptive observations refine water vapor transport and adjust vortex dynamics. This research highlights the importance of accurately predicting shear lines and jet streams for forecasting heavy rainfall in these areas. Overall, this study found that adaptive observation enhances the precipitation forecast skills of the structure and location for heavy rainfall in South China and the Sichuan Basin, emphasizing their potential utility in operational numerical weather prediction.

关键词： adaptive observation ensemble transform sensitivity data assimilation rainfall

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Broadband Insulator-Based Dynamic Diode with Ultrafast Hot Carriers Process

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Research 2023年第2期2022卷 297-304页

作者： Runjiang Shen Yanghua Lu xutao yu Qi Ge Huiming Zhong Shisheng Lin Colege of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China Chongqing 2D Material Institute Chongqing 410020China Department Emergency The Seond Aliated Hopital Zhejiang Universy Shoolof Medicin Zhejiang Univery Hangzhou 310009China State Key Laboratory of Modern Optical Instrumentation Zhejiang UniversityHangzhou 310027China Hangzhou Gelanfeng Technology Co.Ltd. Hangzhou 310051China

The excitation,rebound,and transport process of hot carriers(HCs)inside dynamic diode(DD)based on insulators has been rarely explored due to the original stereotyped in which it was thought that the insulators are ***,the carrier dynamics of DD is totally different from the static diode,which may bring a subverting insight of insulators.

关键词： diode insulator Broadband

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Optimal Rate for Constant-Fidelity Entanglement in Quantum Communication Networks

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ZTE Communications 2013年第3期11卷 46-50页

作者： Youxun Cai xutao yu Yang Cao State Key Laboratory of Millimeter Waves Southeast University

In this paper, we propose an entanglement scheme for long-distance, constant-fidelity communication in quantum networks. We discuss the optimal rate of entanglement that allows for constant fidelity in both elementary and muhihop links. We also discuss time complexity and propose the mathematical order of the rate capacity for an entanglement scheme. We propose a recursive entanglement scheme, a simultaneous entanglement scheme, and an adjacent entanglement scheme mathematically analyze these schemes. The rate capacity of the recursive and simultaneous entanglement schemes is Ω（1/e^n）, but the adjacent entanglement scheme performs better, providing a rate of lΩ（1/n）.

关键词： rate capacity constant fidelity entanglement scheme ad hoc quantum networks

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磁浮列车双冗余加速度传感器故障检测研究

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仪器仪表学报 2023年第10期44卷 138-144页

作者：余旭涛吴威牛刚同济大学铁道与城市轨道交通研究院上海201804

磁浮列车双冗余加速度传感器外置于电磁铁之上,运行时受振动、电磁干扰、温湿度变化等因素影响,测量特性不稳定,体现为动态的测量噪声。现阶段工程中常采用测试对比法检测冗余传感器,动态噪声下易出现虚警漏警的问题,检测准确率低,因此... 详细信息

磁浮列车双冗余加速度传感器外置于电磁铁之上,运行时受振动、电磁干扰、温湿度变化等因素影响,测量特性不稳定,体现为动态的测量噪声。现阶段工程中常采用测试对比法检测冗余传感器,动态噪声下易出现虚警漏警的问题,检测准确率低,因此提出了基于自适应多点广义似然比检验的传感器故障检测方法。采用多点判决形式,增强对离群点的鲁棒性,同时引入滑动窗方差估计,递推估计奇偶向量的方差,调整判决函数,实现对动态噪声的自适应。经小比例悬浮试验台验证,相比同类传统方法,算法在静态噪声实验中检测准确率提高15%,在动态噪声实验中检测准确率提高13%,且显著改善了虚警漏警抑制能力,对动态噪声具有良好的鲁棒性。

关键词：双冗余加速度传感器故障检测广义似然比检验

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