检索结果-内蒙古大学图书馆

Hot-band absorption of indocyanine green for advanced anti-stokes fluorescence bioimaging

Light(Science & Applications) 2021年第10期10卷 1877-1888页

作者： Jing Zhou Xiaoxiao Fan Di Wu Jie Liu Yuhuang Zhang Zikang Ye Dingwei Xue Mubin He Liang Zhu Zhe Feng Andrey N.Kuzmin Wen Liu Paras N.Prasad Jun Qian State Key Laboratory of Modern Optical Instrumentations Centre for Optical and Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310058China Sir Run-Run Shaw Hospital School of MedicineZhejiang UniversityHangzhou 310016China Key Laboratory of Flexible Electronics(KLOFE)Institute of Advanced Materials(IAM) Nanjing Tech University(Nanjing Tech)Nanjing 211800China Department of Chemistry Zhejiang UniversityHangzhou 310058China Interdisciplinary Institute of Neuroscience and Technology(ZIINT) College of Biomedical Engineering and Instrument ScienceZhejiang UniversityHangzhou 310027China Institute for Lasers Photonicsand BiophotonicsDepartment of ChemistryUniversity at BuffaloState University of New YorkBuffaloNY 14260USA Key Laboratory of Optical Information Detection and Display Technology of Zhejiang Zhejiang Normal UniversityJinhua 321004China

Bright anti-Stokes fluorescence(ASF)in the first near-infrared spectral region(NIR-I,800 nm–900 nm)under the excitation of a 915 nm continuous wave(CW)laser,is observed in Indocyanine Green(ICG),a dye approved by the Food and Drug Administration for clinical *** dependence of fluorescence intensity on excitation light power and temperature,together with fluorescence lifetime measurement,establish this ASF to be originated from absorption from a thermally excited vibrational level(hot-band absorption),as shown in our experiments,which is stronger than the upconversion fluorescence from widely-used rare-earth ion doped *** test the utility of this ASF NIR-I probe for advanced bioimaging,we successively apply it for biothermal sensing,cerebral blood vessel tomography and blood stream ***,in combination with L1057 nanoparticles,which absorb the ASF of ICG and emit beyond 1100 nm,these two probes generate multi-mode images in two fluorescent channels under the excitation of a single 915 nm CW *** channel is used to monitor two overlapping organs,urinary system&blood vessel of a live mouse,while the other shows urinary system *** in intraoperative real-time monitoring,such multi-mode imaging method can be beneficial for visual guiding in anatomy of the urinary system to avoid any accidental injury to the surrounding blood vessels during surgery.

关键词： absorption excitation anatomy

来源：评论

学校读者我要写书评

暂无评论

Short-term photovoltaic power forecasting model based on improved BP neural network method 4

Short-term photovoltaic power forecasting model based on imp...

引用

4th IEEE Conference on Energy Internet and Energy System Integration, EI2 2020

作者： Peng, Yuan Lou, Suhua Yang, Senlin Wu, Yaowu He, Xianglu Zhang, Wangxi Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China State Grid Qinghai Electric Power Company Xining China

ISBN: (纸本)9781728196060

Photovoltaic power generation is an important part of the global energy system and energy internet. Accurate photovoltaic power forecasting is beneficial to the optimization of power grid scheduling and the promotion of clean energy consumption. This paper analyzes the seasonal and daily characteristics of the photovoltaic power, uses self-organizing maps (SOM) to dig out the inherent disciplines and essential properties of data, clustering sequences with similar characteristics. Then the MEA-BP model is established which applies mind evolutionary algorithm (MEA) to improving BP neural network. MEA coordinates the local and global values by introducing the evolution mechanism of convergence and dissimilation to optimize the weight and threshold of BP. Next, neural network error correction model is proposed to fix forecasting error. Based on the data of a 50MW photovoltaic power station, the numerical results show that the model can improve the accuracy of photovoltaic power forecasting effectively. © 2020 IEEE.

关键词： Error correction

来源：评论

学校读者我要写书评

暂无评论

Coordinated generation and transmission expansion planning with high proportion of renewable energy 4

Coordinated generation and transmission expansion planning w...

引用

4th IEEE Conference on Energy Internet and Energy System Integration, EI2 2020

作者： Ma, Longfei Wu, Yaowu Lou, Suhua Liang, Shuhao Liu, Mei Gao, Yuan Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China State Grid Economic and Technical Research Institute Beijing China

ISBN: (纸本)9781728196060

In the context of a high proportion of renewable energy connected to the power system, in order to promote the consumption of renewable energy, generation planning and transmission expansion should be coordinated. Considering the generation characteristics of wind power / photovoltaic and concentrating solar power (CSP) and their influence on the power balance of the system, the coordinated generation and transmission expansion planning model is established with the minimum sum of the investment and construction cost, operation cost and penalty cost of the power system as the optimization objective. Combined with genetic algorithm and gradient algorithm, a hybrid genetic gradient algorithm (HGG) is proposed to solve the model. The effectiveness and practicability of the proposed model are verified by an example in a certain region of China. © 2020 IEEE.

关键词： Wind power

来源：评论

学校读者我要写书评

暂无评论

LVRT During-fault-stage Equilibrium Point is Unnecessary for Renewable Grid-tied Systems

LVRT During-fault-stage Equilibrium Point is Unnecessary for...

引用

Power System and Green Energy Conference (PSGEC)

作者： Yayao Zhang Min Cheng Meng Zhan Jiawei Yu Yihua Zhu Mingkang Wu State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China Yunnan Power Grid China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid China National Energy Power Grid Technology R&D Centre Electric Power Research Institute China Southern Power Grid China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Electric Power Research Institute China Southern Power Grid China

ISBN: (数字)9798350365573

ISBN: (纸本)9798350365580

Transient synchronous stability of renewable grid- tied systems is of paramount importance. Most of previous studies focused on the grid-tied converter in the low voltage ride through (LVRT) during-fault stage and performed stability analysis based on the belief that if the system has (or has no) a stable equilibrium point in the during-fault stage, the system will be stable (or unstable). Therefore, it has been broadly accepted that the existence and/or stability of equilibrium point in the during-fault stage is necessary. However, the whole LVRT contains four different stages and the during-fault stage is only one among them. The transient synchronous stability of whole system should be determined by the initial state in the late post-fault stage and the attraction basin of its equilibrium point. The late post-fault stage is essential for stability and all four stages are important. Clearly treating the during-fault stage as the whole LVRT stages makes the nonlinear switched dynamics problem be greatly simplified and, certainly, is incomplete. In order to clarify this point, this paper analyzes the influence of existence (or nonexistence) of equilibrium point in the during-fault stage on the transient synchronous stability of permanent magnet synchronous generator grid-tied system. We can find that the existence of an equilibrium point in the during-fault stage is only a sufficient condition, rather than a necessary condition. The theoretical analysis is also verified in the hardware-in-the-loop experiment Therefore, a large number of previous studies and results on the transient synchronous stability of renewable grid-tied systems are incomplete and questionable.

关键词： Sufficient conditions Stability criteria Switches Voltage Power system stability Synchronous generators Permanent magnets Nonlinear dynamical systems Transient analysis Magnetic switching

来源：评论

学校读者我要写书评

暂无评论

Radial and axial temperature distribution of nano-second pulsed spark discharge 1

Radial and axial temperature distribution of nano-second pul...

引用

1st IEEE China International Youth Conference on Electrical engineering, CIYCEE 2020

作者： Luo, Tianshu Chen, Zhe Luo, Haiyun Yang, Yong Huazhong University of Science and Technology School of Electrical and Electronic Engineering State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China Tsinghua University Department of Electrical Engineering Beijing100084 China

ISBN: (纸本)9781728196596

In order to study the radial and axial temperature distribution of nano-second pulse spark discharge, this paper uses SOS pulse power supply to discharge the stainless steel needle electrode, uses spectrometer and ICCD high-speed camera to diagnose the spectrum of plasma, and conducts comparative analysis with the software. It is found that when the absolute value of radial displacement increases, the vibration temperature decreases gradually. When the absolute value of axial displacement increases, the rotation temperature decreases gradually and the temperature near the anode is higher. These results indicate the plasma temperature at different positions and provide diagnostic basis for the application of spark discharge plasma. © 2020 IEEE.

关键词： Electrodes

来源：评论

学校读者我要写书评

暂无评论

Dynamic Parameter Identification Method of Synchronous Machine with Arbitrary Rotor Position Based on three-Phase Connected DC-Decay Tests

Dynamic Parameter Identification Method of Synchronous Machi...

引用

IEEE International Conference on Power and Power and Renewable Energy (ICPRE)

作者： Haoyu Kang Shuxin Tan Yiming Ma Yanming Gao Lin Luo Jianjun Liu Jin Wang Libing Zhou State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology Wuhan China Southern Power Grid Peak Shaving Frequency Modulation Power Generation Co. Ltd. Engineering Construction Guangzhou China CSG PGC Energy Storage Research Insitute Guangzhou China Dongfang Electric Machinery Co. Ltd Dongfang Electric Corporation Deyang China

ISBN: (数字)9798350377460

ISBN: (纸本)9798350377477

The three-phase short-circuit test is a common method for measuring transient parameters of large synchronous machines. The experimental process is complex and carries certain risks. Traditional stationary test methods can enhance the safety of parameter identification experiments; however, the required rotor pre-positioning for these experiments is difficult to implement in large synchronous machines. To address these issues, this paper proposes a synchronous machine parameter identification method based on a three-phase connection of the DC decay test at arbitrary rotor positions, grounded on the principle of signal input experiments. This method equivalently transforms the DC decay test of the three-phase connection at arbitrary positions into independent rotor d- and q-axis pre-positioned DC decay tests. Using the simulated annealing particle swarm optimization algorithm to fit the current response signal, the machine's dynamic parameters are calculated. The validity and accuracy of the proposed parameter identification method were verified through experiments on a 172 MV A synchronous machine. This method requires low testing equipment, involves fewer tests, and has simple data processing, making it safe and reliable.

关键词： Parameter estimation Heuristic algorithms Welding Rotors Transforms Simulated annealing Safety Synchronous machines Transient analysis Testing

来源：评论

学校读者我要写书评

暂无评论

Numerical Analysis of Vanadium Redox Flow Batteries Considering Electrode Deformation Under Various Flow Fields

SSRN

引用

SSRN 2022年

作者： Fang, Jiakun Xiong, Binyu Li, Yang Ding, Yuming Zhao, Jiyun Wei, Zhongbao Ai, Xiaomeng School of Automation Wuhan University of Technology Wuhan430070 China Beijing Institute of Technology National Engineering Laboratory for Electric Vehicles Beijing100081 China Department of Mechanical Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

The porous electrode of vanadium redox flow batteries (VRBs) is subject to deformation due to mechanical stress during stack assembling. The forces compress the electrode fiber into the flow channel and thus alter the electrode porosity ratio. Due to the complex mechanisms, the effects of resulting electrode morphological changes on VRB performance were usually ignored in existing studies. This paper proposes a three-dimensional VRB model considering the uneven electrode deformation to investigate the cell performance under different electrode compression ratios with three flow-field designs. Compression ratio (CR) and the intrusive part of the electrode are obtained under various mechanical stress in the experiment. The proposed electrochemical model is established based on the conservation laws and analyzed using the COMSOL platform. The concentration overpotential, pressure drop, and distribution uniformity, are selected for analysis. Simulation results reveal that the pressure drop and the concentration overpotential are sensitive to the CR but less affected by the concentration uniformity. The minimum overpotential can be reached when the CR is around 40%-50%, depending on flow field designs, while a higher CR can cause a drastically increased pressure drop. It is also found that the interdigitated flow field with a CR of 45% is considered optimal. © 2022, The Authors. All rights reserved.

关键词： Deformation

来源：评论

学校读者我要写书评

暂无评论

Modeling and HIL Test of a D-PMSG Connected to Power System with Damping Control for Real Time Studies

Modeling and HIL Test of a D-PMSG Connected to Power System ...

引用

IEEE Asia Power and Energy engineering Conference (APEEC)

作者： Jue Hou Zhou Liu Shaorong Wang Zhe Chen The State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China Aalborg University Aalborg Denmark

Since increasing renewable sources are integrated to power system, dynamic behavior of power system turns complicated. This paper proposes a detailed direct-driven wind permanent magnet synchronous generator (D-PMSG) connected to power system simulation structure that combines Real Time Digital Simulator (RTDS) and an additional control device in LabVIEW using discretization to implement the control hardware-in-the-loop (CHIL) simulation. Feasibility demonstration of RTDS model using large-and-small time step are demonstrated in real time simulation. Control effect optimization of damping method is conducted based on case studies in CHIL testing.

关键词： Damping Computational modeling Power system dynamics Transfer functions Wind power generation Real-time systems Mathematical model

来源：评论

学校读者我要写书评

暂无评论

Estimation of magnetic island width by the fluctuations of electron cyclotron emission radiometer on J-TEXT

引用

Plasma Science and technology 2019年第1期21卷 24-28页

作者： Bowen RUAN Zhoujun YANG Xiaoming PAN Hao ZHOU Fengqi CHANG Jing ZHOU International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology

The width of a magnetic island is an important parameter for the quantitative analysis of magnetohydrodynamic-related physics. An electron cyclotron emission radiometer(ECE) is a powerful tool that can be used to obtain this width, which can usually be determined from the flat temperature distribution at the O-point phase or the maxima temperature perturbation. An improved method to estimate the width of a magnetic island is proposed in this paper, and it is independent of calibration. With this method and the existing 24-channel ECE system, the width of a rotation magnetic island can be estimated. Additionally, by filtering the fluctuation ECE signal, the evolution of the magnetic island can be obtained. The results of this method are consistent with those of the integrated magnetic probe signals, which represent the relative change of the magnetic island.

关键词： magnetic island width ECE relative temperature perturbation J-TEXT tokamak

来源：评论

学校读者我要写书评

暂无评论

Distribution Dynamic Operating Security Space Characterization for Aggregation and Congestion Capacity Evaluation of Virtual Power Plant

引用

IEEE Transactions on Smart Grid 2025年

作者： Song, Meng Xu, Zekai Gao, Ciwei Yan, Mingyu Hu, Qinran Southeast University School of Electrical Engineering Nanjing210096 China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China

Virtual power plant(VPP) can manage distributed energy resources (DERs) to serve the grid, which should satisfy the power flow constraints. However, the distribution system operator(DSO) monopolies system parameters and VPP cannot directly access them. To solve the coordination problem between distribution operation security and VPP management, the distribution dynamic operating security space (DOSS) is proposed to constrain the DER output power for VPP aggregation and congestion capacity evaluation. First, a hybrid fuzzy modeling method based on the distribution system security region is employed to characterize DOSS, and less information exchange between VPP and DSO is required. Data privacy is well respected, and the computational complexity is also reduced. Second, the enhanced opposite direction searching algorithm and the generalized credibility-based piecewise membership crisp method are applied to achieve DOSS's type-reduction and defuzzification for VPP aggregation. This clarifies distribution security risks on VPP through DOSS’s credibility levels. Finally, VPP congestion capacity is proposed to quantify security constraint impacts on the VPP aggregation capacity, which can help coordinate the VPP economic and DSO secure operations. Case studies demonstrate that the proposed methodology can effectively embed the distribution operation security constraints into VPP aggregation and show higher applicability and lower conservativeness than existing approaches. © 2010-2012 IEEE.

关键词： Sensitive data

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：