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Energy Engineering 2025年第2期122卷 651-666页

作者： Dianlang Wang qi yin Haifeng Wang Jing Chen Hong Miao Yihan Chen Substation Management Office Qujing Bureau of CSG EHV Power Transmission CompanyQujing655000China College of Electrical Engineering SichuanUniversityChengdu610065China

As the penetration rate of distributed energy increases,the transient power angle stability problem of the virtual synchronous generator(VSG)has gradually become *** view of the situation that the grid impedance ratio(R/X)is high and affects the transient power angle stability of VSG,this paper proposes a VSG transient power angle stability control strategy based on the combination of frequency difference feedback and virtual *** improve the transient power angle stability of the VSG,a virtual impedance is adopted in the voltage loop to adjust the impedance ratio R/X;and the PI control feedback of the VSG frequency difference is introduced in the reactive powervoltage link of theVSGto enhance the damping ***-orderVSGdynamic nonlinearmodel considering the reactive power-voltage loop is established and the influence of different proportional integral(PI)control parameters on the system balance stability is ***,the impact of the impedance ratio R/X on the transient power angle stability is presented using the equal area *** the simulations,during the voltage dips with the reduction of R/X from 1.6 to 0.8,Δδ_(1)is reduced from 0.194 rad to 0.072 rad,Δf_(1)is reduced from 0.170 to 0.093 Hz,which shows better transient power angle *** results verify that compared with traditional VSG,the proposedmethod can effectively improve the transient power angle stability of the system.

关键词： Transient synchronous stability virtual synchronous generator impedance ratio

Advancing the diagnosis of major depressive disorder:Integrating neuroimaging and machine learning

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World Journal of Psychiatry 2025年第3期15卷 23-31页

作者： Shi-qi yin ying-Huan Li School of Pharmaceutical Sciences Capital Medical UniversityBeijing 100069China

Major depressive disorder(MDD),a psychiatric disorder characterized by functional brain deficits,poses considerable diagnostic and treatment challenges,especially in adolescents owing to varying clinical *** hold substantial clinical potential in the field of mental health,enabling objective assessments of physiological and pathological states,facilitating early diagnosis,and enhancing clinical decision-making and patient *** breakthroughs combine neuroimaging with machine learning(ML)to distinguish brain activity patterns between MDD patients and healthy controls,paving the way for diagnostic support and personalized ***,the accuracy of the results depends on the selection of neuroimaging features and *** privacy protection,ML model accuracy,and fostering trust are essential steps prior to clinical *** research should prioritize the establishment of comprehensive legal frameworks and regulatory mechanisms for using ML in MDD diagnosis while safeguarding patient privacy and *** doing so,we can advance accuracy and personalized care for MDD.

关键词： Major depressive disorder Biomarkers Neuroimaging Machine learning Personalized treatment Resting-state functional magnetic resonance imaging Functional connectivity Model accuracy Major depressive disorder diagnosis

A novel arterial coupler with non-return snap-fit connection approach optimized arterial end-to-end anastomotic technique:An experimental study

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Chinese Journal of Traumatology 2025年第1期28卷 13-21页

作者： Hong-Bo Guo Mo-Fei Wang Ren-qi yin Kang-Kang Zhi Department of Vascular and Endovascular Surgery Changzheng HospitalNaval Medical UniversityShanghai200003China School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghai200093China

Purpose:Hand-sewn anastomosis as the gold standard of vascular anastomosis cannot fully meet the requirements of vascular anastomosis in speed and *** vascular couplers have been developed to ameliorate this *** of them are mainly used for venous anastomosis rather than arterial *** it is generally acknowledged that in almost all operations involving vascular reconstruction,it is the arteries that need to be anastomosed faster and more accurately and not the veins.A dedicated device is needed for creating arterial anastomosis in an easy,timesaving,less damaging but reliable ***,we plan to develop a novel arterial coupler device and test pre-clinical safety and ***:In this cohort study,the rationality of this novel arterial coupler was preliminarily tested by finite element analysis before it was *** factors restrict the use of vascular couplers in arterial anastomosis,such as arterial eversion,fixation,*** manufactured arterial couplers underwent in vitro and in vivo *** vitro,isolated arteries of beagles were anastomosed with the assistance of an arterial coupler,and the anastomosed arteries were evaluated through anti-traction *** animal experiments,the bilateral femoral arteries of 5 beagles served as a control *** dissection,the femoral artery on one side was randomly selected to be anastomosed with a quick arterial coupler(QAC)(QAC group),and the femoral artery on the other side was anastomosed by the same person using an end-to-end suture technique with a 6-0 Prolene suture(suture group).The bilateral femoral arteries of 5 beagles were used for coupler-assisted anastomosis and hand-sewn anastomosis in vivo,*** rate,blood loss,anastomotic time,clamp time,total operation time,and patency rate were *** patency of anastomosed arteries was assessed using vascular Doppler ultrasound,electromagnetic flowmeter,and pathologica

关键词： Coupler Vascular anastomosis Arterial anastomosis End-to-end Novel device

Hydrothermal preparation of Nb-doped NaTaO_(3) with enhanced photocatalytic activity for removal of organic dye

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Chinese Journal of Chemical Engineering 2022年第6期35卷 142-149页

作者： Hao Zhou qi yin State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China

The construction of efficient photocatalysts has received much attention in wastewater *** this study,Nb-doped NaTaO_(3) was prepared with different doping ratio by a facile hydrothermal *** prepared catalysts were analyzed by X-ray diffraction,scanning electron microscopy,Brunauer-EmmettTeller(BET)theory,ultraviolet–visible diffuse reflectance *** the synthesized catalysts were employed to degrade a model pollutant,methylene blue(MB),under a 250 W mercury *** characterization tests confirm that Nb was successfully doped into the crystal structure of NaTaO_(3) and the modified NaNb_(x)Ta_(1)·xO_(3)(x is the doping ratio;x=0.25,0.5,0.75)samples were formed,which were in regular cubic shapes just like pure NaTaO_(3).The synthesized NaNb_(x)Ta_(1)·xO_(3)(x=0.25,0.5,0.75)had improved specific surface area and narrowed band gaps compared with pure NaTaO_(3).In photocatalytic degradation experiments,NaNb0.75Ta0.25O_(3) presented the best photocatalytic activity ascribed to the narrow band gap and the high surface area,degradating 95.7%of MB after 180 min of reaction,which was even twice the ability of pure NaTaO_(3).Besides,the effects of possible inorganic anions and cations in wastewater on photocatalytic degradation were *** spin resonance(ESR)tests and capture experiments were also conducted and a possible photocatalytic mechanism was *** work provides a direction for constructing superior NaTaO_(3)-based photocatalysts to be widely utilized in environmental protection.

关键词： Photocatalytic degradation Methylene blue NaTaO_(3)

Insensitizing Controls for the Parabolic Equation with Equivalued Surface Boundary Conditions

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Acta Mathematica Sinica,English Series 2012年第12期28卷 2373-2394页

作者： Zhong qi yin School of Mathematics Sichuan University Department of Mathematics Sichuan Normal University

This paper is devoted to the study of the existence of insensitizing controls for the parabolic equation with equivalued surface boundary conditions. The insensitizing problem consists in finding a control function such that some energy functional of the equation is locally insensitive to a perturbation of the initial data. As usual, this problem can be reduced to a partially null controllability problem for a cascade system of two parabolic equations with equivalued surface boundary conditions. Compared the problems with usual boundary conditions~ in the present case we need to derive a new global Carleman estimate, for which, in particular one needs to construct a new weight function to match the equivalued surface boundary conditions.

关键词： Insensitizing controls parabolic equation equivalued boundary conditions

Influence of natural deposition plane orientation on oedometric consolidation behavior of three typical clays from southeast coast of China

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第11期14卷 767-777页

作者： qi-yin ZHU yin-fu JIN Zhen-yu yin Pierre-Yves HICHER Department of Civil Engineering Shanghai Jiao Tong University LUNAM University Ecole Centrale de NantesGeM UMR CNRS 6183 Nantes France

The parameters obtained from oedometric consolidation tests are commonly used in the development of constitutive modeling and for engineering practice. This paper focuses on the influence of the natural deposition plane orientation on oedometric consolidation behavior of three natural clays from the southeast coast of China. Oedometer tests were conducted on intact specimens prepared by sampling at a series of angles relative to the natural deposition plane. For each specimen, yield stress,compressibility indexes, secondary compression, and permeability coefficients were determined. The influence of the sampling angle on these properties was investigated, revealing that yield stress, compression index, swelling index, creep index, ratio of secondary compression coefficient to compression index(Cae/Cc) and permeability coefficient were all dependent to some extent on the sampling angle. These findings indicate the role of the anisotropy due to the natural deposition on the oedometric consolidation behavior.

关键词： Clay Compressibility Consolidation Creep Permeability Natural deposition

Quantum superposition, entanglement, and state teleportation of a microorganism on an electromechanical oscillator

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Science Bulletin 2016年第2期61卷 163-171页

作者： Tongcang Li Zhang-qi yin Department of Physics and Astronomy Purdue University School of Electrical and Computer Engineering Purdue University Birck Nanotechnology Center Purdue University Purdue Quantum Center Purdue University Center for Quantum Information Institute of Interdisciplinary Information Sciences Tsinghua University

Schrodinger＇s thought experiment to prepare a cat in a superposition of both alive and dead states reveals profound consequences of quantum mechanics and has attracted enormous interests. Here we propose a straight- forward method to create quantum superposition states of a living microorganism by putting a small cryopreserved bacterium on top of an electromechanical oscillator. Our proposal is based on recent developments that the center- of-mass oscillation of a 15-pro-diameter aluminum mem- brane has been cooled to its quantum ground state （Teufel et al. in Nature 475：359, 2011）, and entangled with a microwave field （Palomaki et al. in Science 342：710, 2013）. A microorganism with a mass much smaller than the mass of the electromechanical membrane will not signifi- cantly affect the quality factor of the membrane and can be cooled to the quantum ground state together with themembrane. Quantum superposition and teleportation of its center-of-mass motion state can be realized with the help of superconducting microwave circuits. More importantly, the internal states of a microorganism, such as the electron spin of a glycine radical, can be entangled with its center-of- mass motion and teleported to a remote microorganism. Our proposal can be realized with state-of-the-art tech- nologies. The proposed setup is a quantum-limited mag- netic resonance force microscope. Since internal states of an organism contain information, our proposal also pro- vides a scheme for teleporting information or memories between two remote organisms.

关键词： Quantum superposition Quantumentanglement Quantum teleportation Schrodinger'scat Electromechanical Oscillator Cryopreservedmicroorganism

Upper Recollements and Triangle Expansions

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Acta Mathematica Sinica,English Series 2016年第11期32卷 1323-1336页

作者： You qi yin Nan GAO Department of Mathematics Shanghai Jiao Tong University Department of Mathematics Shaoxing University Department of Mathematics Shanghai University

By using the stable t-structure induced by an adjoint pair, we extend several results con- cerning recollements to upper （resp. lower） recollements. These include the fundamental results of Par-shall and Scott on comparisons of recollements, Wiedemann＇s result on the global dimension and Hap- pel＇s result on the finitistic dimension, occurring in a recollement （Db（A＇）, Db（A）, Db（A＂）） of bounded derived categories of Artin algebras. We introduce and describe a triangle expansion of a triangulated category and illustrate it by examples.

关键词： Upper (lower) recollement comparison global dimension finitistic dimension triangle expansion

Efficiently simulating the work distribution of multiple identical bosons with boson sampling

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Frontiers of physics 2024年第3期19卷 197-206页

作者： Wen-qiang Liu Zhang-qi yin Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements(MOE) School of PhysicsBeijing Institute of TechnologyBeijing 100081China

Boson sampling has been theoretically proposed and experimentally demonstrated to show quantum computational ***,it still lacks the deep understanding of the practical applications of boson *** we propose that boson sampling can be used to efficiently simulate the work distribution of multiple identical *** link the work distribution to boson sampling and numerically calculate the transition amplitude matrix between the single-boson eigenstates in a one-dimensional quantum piston system,and then map the matrix to a linear optical network of boson *** work distribution can be efficiently simulated by the output probabilities of boson sampling using the method of the grouped probability *** scheme requires at most a polynomial number of the samples and the optical *** work opens up a new path towards the calculation of complex quantum work distribution using only photons and linear optics.

关键词： quantum simulation quantum work distribution boson sampling linear optic

Tail Display Intensity is Restricted by Food Availability in an Asian Agamid Lizard(Phrynocephalus vlangalii)

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Asian Herpetological Research 2020年第3期11卷 240-248页

作者： Xinxin ZHU Zhongyi YAO yin qi Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041SichuanChina University of Chinese Academy of Sciences Beijing 101409China

To ascertain the function of signals,we have to first uncover the reasons behind signal *** are several potential driving forces,including background noise,predation cost,receiver perception,and energy *** energy limitation hypothesis assumes that individuals trade off signal intensity and energy expenditure according to resource condition,while variation of signal intensity likely associates with food *** hypothesis has been evidenced by a great number of researches on vocal signals,but no studies evaluated the influence of food availability on motion visual signal in *** we used an Asian agamid lizard Phr ynocephalus vlangalii and examined the effect of food availability on tail display *** designed two food restriction treatments as well as a nature control treatment,and quantified individual tail display speed and display duration under different food availability *** with our prediction,our results showed that males significantly reduced their average tail display speed and maximum display speed in both food restriction treatments when compared to nature control ***,our study provides direct evidence that lizards would trade off their display intensity according to the food condition,suggesting tail display is energetically costly and likely provides honest information on individual body condition and resource hold potential.

关键词： animal communication energy limitation lizard signal variation tail display