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Intelligent Assessment of Active and ReactivePower Flow with Satisfying Accuracy forN-k_(1)-k_(2) Cascading Outages

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Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 986-999页

作者： Yusheng xue Yun Liu NARI Group Corporation(State Grid Electric Power Research Institute) NanjingChina School of Electrical Engineering Shandong UniversityJinanChina

Addressed to the N-k_(1)-k_(2) cascading outages,it is computationally burdensome for the reliable calculation of active and reactive power *** paper builds a comprehensive framework with three algorithms,including the distribution factor(DF),the Newton-Raphson(NR),and the first iteration of NR algorithm(termed as 1J).Classifiers are designed to determine whether the NR algorithm should be employed for *** features are extracted upon the analytical error of *** reactive power is partially considered in the 1J but neglected in the DF algorithm,the deviation between the solutions is taken as one crucial *** support vector machine(SVM)is then utilized for classifier *** the deep integration of the causal inference and the statistical paradigm,this framework calculates active and reactive power flows rapidly,reliably,and *** effectiveness and robustness are fully validated in three typical IEEE systems.

关键词： Active power flow algorithm coordination causal algorithm integration of research paradigms N-k_(1)-k_(2)cascading outage reactive power flow

Quantitative Assessment for Commutation Security Based on Extinction Angle Trajectory

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Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 328-337页

作者： Qi Tao Yusheng xue the School of Electrical Engineering Zhejiang UniversityHangzhou 310000China NARI Group Corporation(State Grid Electric Power Research Institute) Nanjing 211106China

In order to reduce the risk of commutation failure(CF)in the AC/DC hybrid power system,the quantitative analysis on CF is required for on-line assessment and optimal *** paper presents an accurate and reliable method to quantify the commutation security based on the trajectory due to the complexity of the high-voltage direct current(HVDC)***,the characteristics of the extinction angle trajectory are analyzed under both commutation success and failure *** commutation security margin index(CSMI)is then proposed for the HVDC ***,a search strategy for parameter limits is put forward based on the sensitivity analysis of CSMI to accelerate the search speed with a guaranteed accuracy level.A modified IEEE 39-bus power system and an actual large-scale power system with 46 generators and 821 buses are utilized to verify the validity and robustness of the proposed index and strategy.

关键词： AC/DC hybrid power system commutation failure(CF) commutation security margin high-voltage direct current(HVDC) security limit

Individualized treatment guided by endoscopic ultrasound-guided fine-needle aspiration for adrenocortical oncocytoma:A case report

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World Journal of Clinical Oncology 2025年第2期16卷 158-164页

作者： Han Chen xue Jing Department of Gastroenterology The Affiliated Hospital of Qingdao UniversityQingdao 266000Shandong ProvinceChina

BACKGROUND Adrenocortical oncocytoma is a rare,mostly benign,nonfunctional tumor that is typically detected *** diagnosis is challenging because of the absence of distinctive imaging characteristics,necessitating pathological *** SUMMARY We present a case report of a 35-year-old woman with an adrenal mass located on the left side,where endoscopic ultrasound-guided fine-needle aspiration(EUSFNA)was performed after comprehensive diagnostic *** results are consistent with those of previously documented cases regarding tumor demographics and anatomical *** the limited number of reports on this condition,long-term follow-up is crucial to enhance our understanding of its *** For patients with adrenocortical oncocytoma,EUS-FNA can enables collection of preoperative tissue specimens leading to suitable treatment strategies.

关键词： Adrenocortical oncocytoma Non-functioning tumor Endoscopic ultrasound guided fine-needle aspiration Diagnosis Case report

Quantum Memory via Wigner Crystals of Polar Molecules

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Chinese Physics Letters 2011年第12期28卷 32-35页

作者： xue Peng Department of Physics Southeast UniversityNanjing 211189

Collective excitations of rotational and spin states of an ensemble of polar molecules as a candidate for a high-fidelity quantum memory are *** dipolar crystals are formed in the high-density limit of cold clouds of polar molecules under one-dimensional trapping *** lifetime of quantum memory is calculated by identifying the dominant decoherence mechanisms,and we estimate their effects on gate operations,when a molecular ensemble qubit is transferred to a superconducting microwave cavity.

关键词： ensemble quantum operations

Quantum Computing via Singlet-Triplet Spin Qubits in Nanowire Double Quantum Dots

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Chinese Physics Letters 2011年第7期28卷 31-34页

作者： xue Peng Department of Physics Southeast UniversityNanjing 211189

We propose a new structure for quantum computing via spin qubits with high *** spin qubit corresponds to two electrons in a nanowire double quantum dot,with the singlet and one of the triplets as the logical qubit *** entangling gate is effected by virtual charge dipole *** include noise to show the feasibility of this scheme under current experimental conditions.

关键词： conditions states quantum

Physiological-physical feature fusion for automatic voice spoofing detection

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Frontiers of Computer Science 2023年第2期17卷 157-166页

作者： Junxiao xue Hao ZHOU Research Institute of Artificial Intelligence Zhejiang LabHangzhou 311121China School of Cyber Science and Engineering Zhengzhou UniversityZhengzhou 450002China Henan Key Laboratory of Cyberspace Situation Awareness Zhengzhou 450000China

Biometric speech recognition systems are often subject to various spoofing attacks,the most common of which are speech synthesis and speech conversion *** spoofing attacks can cause the biometric speech recognition system to incorrectly accept these spoofing attacks,which can compromise the security of this *** have made many efforts to address this problem,and the existing studies have used the physical features of speech to identify spoofing ***,recent studies have shown that speech contains a large number of physiological features related to the human *** example,we can determine the speaker's gender,age,mouth shape,and other information by *** by the above researches,we propose a spoofing attack recognition method based on physiological-physical features *** method involves feature extraction,a densely connected convolutional neural network with squeeze and excitation block(SE-DenseNet),and feature fusion *** first extract physiological features in audio from a pretrained convolutional *** we use SE-DenseNet to extract physical *** a dense connection pattern has high parameter efficiency,and squeeze and excitation blocks can enhance the transmission of the ***,we integrate the two features into the classification network to identify the spoofing *** results on the ASVspoof 2019 data set show that our model is effective for voice spoofing *** the logical access scenario,our model improves the tandem decision cost function and equal error rate scores by 5%and 7%,respectively,compared to existing methods.

关键词： spoofing attacks SE-DenseNet physiological feature

Single metal atom decorated photocatalysts:Progress and challenges

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Nano Research 2021年第4期14卷 934-944页

作者： Lei Zeng Can xue School of materials science and engineering Nanyang Technological University50 Nanyang avenueSingapore 639798Singapore

Photocatalysis has attracted intense attention due to its potential to solve the energy resource problem and environmental *** single metal atom decorated photocatalysts as a rising star become more and more popular because of the unique advantages of superior catalytic activities and ultrahigh atom utilization *** key function of single metal atom catalysts in photocatalytic reactions is boosting surface redox reactions by utilizing photogenerated charges,and has been verified by various spectroscopic and microscopic ***,the activities of the single metal atoms highly depend on the binding environment in the host photocatalyst that affect the adsorption and activation of reactants as well as the reaction energy ***,this mini review summarizes recent progress on single metal atom decorated photocatalysts,and discusses the roles of the single metal atom catalysts in different types of host photocatalysts including organic,carbon-based and inorganic *** remaining challenges and future perspectives on the stability and activities of single atom catalysts in photocatalytic processes are elaborated in the *** believe that this mini review will provide valuable overview on synthetic methods of different single atom photocatalysts for researchers towards future development of highly efficient photocatalysts.

关键词： photocatalysis solar fuels hydrogen generation CO_(2)reduction artificial photosynthesis solar energy conversion

Disorder in parity-time symmetric quantum walks

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Chinese Physics B 2022年第1期31卷 69-73页

作者： Peng xue Beijing Computational Science Research Center Beijing 100084China

We experimentally investigate the impact of static disorder and dynamic disorder on the non-unitary dynamics of parity-time(PT)-symmetric quantum *** temporally alternating photon losses in an interferometric network,we realize the passive PT-symmetric quantum dynamics for single *** coin operations allow us to simulate different environmental influences,which result in three different behaviors of quantum walkers:a standard ballistic spread,a diffusive behavior,and a localization,respectively,in a PT-symmetric quantum walk architecture.

关键词： parity-time symmetry quantum walks disorder

Analysis of Mode Interaction in Ultra-low Frequency Oscillation Based on Trajectory Eigenvalue

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Journal of Modern Power Systems and Clean Energy 2020年第6期8卷 1208-1220页

作者： Yusheng xue Zijun Bin State Grid Electric Power Research Institute Nanjing 211106China the School of Electrical Engineering Shandong UniversityJinan 250061China

Complex phenomena such as prolongedly undamped ultra-low frequency oscillation(ULFO)and eigenmode re-excitation are observed in the simulations of hydroelectric power *** are put on nonlinearities and mode interactions,which cannot be analyzed by traditional eigen-analysis *** order to investigate the mechanism of the evolvement of the nonlinear dynamic process in ULFO,this paper proposes a method to analyze the mode interactions ***,a disturbed trajectory is decoupled into a set of time-varying ***,transfer matrices of eigenmodes are extracted along the ***,consecutive sequences of eigenvalues and trajectories of components are formed by a proposed *** on the decoupled components and transfer matrices,the mechanisms of mode interactions and inheritance relationships between eigenmodes are *** causes and developments of the above complex phenomena are revealed by the proposed method in a test two-machine ***,the accuracy of the eigenmode matching technique is verified in the New England system.

关键词： Eigenmode matching hydroelectric power system mode interaction trajectory eigenvalue ultra-low frequency oscillation