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Adaptive Neural Network Control of Thermoacoustic Instability in Rijke Tube: A Fully Actuated System Approach

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Journal of Systems Science & Complexity 2022年第2期35卷 586-603页

作者： ZHAO Yuzhuo ma Dan ma Hongwei State Key Laboratory of Synthetical Automation for Process Industries and College of Information Science and Engineering Northeastern UniversityShenyang 110819China College of Information Science and Engineering Northeastern UniversityShenyang 110819China

Thermoacoustic instability phenomena often encounter in gas turbine combustors,especially for the premixed combustor design,with many possible detrimental *** a classical experiment,the Rijke tube is the simplest and the most effective illustration to study the thermoacoustic *** paper investigates the active control approach of the thermoacoustic instability in a horizontal Rijke ***’s more,the radial basis function(RBF)neural network is adopted to estimate the complex unknown continuous nonlinear heat release rate in the Rijke ***,based on the proposed second-order fully actuated system model,the authors present an adaptive neural network controller to guarantee the flow velocity fluctuation and pressure fluctuation to converge to a small region of the ***,simulation results demonstrate the feasibility of the design method.

关键词： Adaptive neural network control fully actuated system nonlinear system Rijke tube thermoacoustics instability

ARSENIC REMOVAL BY SULFIDATION SEDIMENTATION IN maGNETIC FIELD

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中国有色金属学会会刊：英文版 1998年第3期8卷 174-177页

作者： ma, Wei ma, Wenji ma, Rongjun Shen, Dianbang South China Univ of Technology Guangzhou China

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关键词： arsenic treatment of waste water sulfide magnetic field

Robust stability analysis for a cruise missile

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Journal of Systems Engineering and Electronics 2008年第4期19卷 785-790页

作者： Shi Yingjing ma Guangfu ma Hongzhong School of Astronautics Harbin Inst. of Technology Harbin 150001 P. R. China Third Research Academy of China Aerospace Science and Industry Corporation Beijing 100074 P. R. China

A global controller design methodology for a flight stage of the cruise missile is proposed. This methodology is based on the method of least squares, To prove robust stability in the full airspace with parameter disturbances, the concepts of convex polytopic models and quadratic stability are introduced, The effect of aerodynamic parameters on system performance is analyzed. The designed controller is applied to track the overloading signal of the cruise segment of the cruise missile, avoiding system disturbance owing to controller switching, Simulation results demonstrate the validity of the proposed method.

关键词： aircraft control robust control least square quadratic stabilization

Coherence evolution in two-qubit system going through amplitude damping channel

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Science China(Physics,Mechanics & Astronomy) 2018年第2期61卷 12-17页

作者： MingJing Zhao Teng ma YuQuan ma School of Science Beijing Information Science and Technology University State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University

In this paper, we analyze the evolution of quantum coherence in a two-qubit system going through the amplitude damping channel. After they have gone through this channel many times, we analyze the systems with respect to the coherence of their output states. When only one subsystem goes through the channel, frozen coherence occurs if and only if this subsystem is incoherent and an auxiliary condition is satisfied for the other subsystem. When two subsystems go through this quantum channel, quantum coherence can be frozen if and only if the two subsystems are both incoherent. We also investigate the evolution of coherence for maximally incoherent-coherent states and derive an equation for the output states after one or two subsystems have gone through the amplitude damping channel.

关键词： quantum coherence amplitude damping channel frozen coherence

Molecular mechanism and research progress of traditional Chinese medicine in the treatment of prostate cancer

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Traditional Medicine Research 2025年第1期10卷 62-72页

作者： Hai-Luo Wang Ruo-Ran Zhang Hao Wang Peng Xu Jing-Kai Wang Bo Chen Hao Xu Deng Pan Yu-Yang ma Kun Pang Department of Urology Xuzhou Central HospitalXuzhou Clinical School of Xuzhou Medical CollegeXuzhou 221009China Graduate School Jiangsu UniversityZhenjiang 212013China Graduate School Bengbu Medical UniversityBengbu 233040China Department of Urology The Peixian People’s HospitalXuzhou 221699China.

Prostate cancer(PCa)is one of the most common malignant tumors in the male genitourinary system,ranking second in incidence *** Chinese medicine(TCM),as an important component of complementary and alternative medicine,shows unique advantages in cancer *** herbal medicine is usually composed of multiple ingredients and involves multiple signaling pathways,which showed function of inducing apoptosis of cancer cells,arresting the cell cycle,inhibiting invasion and metastasis,reducing drug resistance,and regulating immune *** therapy is also an important treatment of ***,Physical therapy such as acupuncture or Tai Chi and Qigong are gaining increased recognition in the management of PCa,particularly in addressing issues like urinary incontinence and bone metastasis-related *** article reviews the TCM treatment and therapy of PCa,in order to provide new research avenues and treatment options for the treatment of PCa with TCM and improve the quality of life of patients.

关键词： traditional Chinese medicine prostate cancer Chinese herbal medicine physical therapy

Stereoscopic PIV Measurements of the Flow Field in a Turbine Cascade

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Journal of Thermal Science 2017年第1期26卷 89-95页

作者： TIAN Yangtao ma Hongwei ma Rong National Key Laboratory of Science and Technology on Aero-Engines Collaborative Innovation Center of AdvancedAero-Engine School of Energy & Power Engineering Beihang University Beijing I00191 China

This paper presents experimental measurements of the flow field in a Low-speed Turbine Cascade using a stereoscopic particle-image velocimetry(SPIV). During the measurements, a pair of frame-straddling-based CCD cameras were configured at different sides of the laser light sheet, and appropriate tracing particles(DEHS) were employed. The measurements were conducted at the incidence angle of 0 degree and exit Reynolds number of 1.7 × 105 with the tip clearance 1.18% of blade chord. The tip flow features, such as the evolution and breakdown of tip leakage vortex, the horseshoe vortex, turbulence characteristics of tip leakage flow, were studied for the flow field analysis. The results showed that the tip leakage flow/vortex mainly dominate flow fields in the tip region. The tip leakage vortex performs as a concentrated vortex before its breaking down and splitting into small vortices. The highest turbulence intensity mainly occurs in the tip region along with the trajectory of tip leakage vortex, and when the vortex breaks down, the turbulence intensity reduces rapidly. Additionally, the SPIV with this configuration also shows an advantage in investigating the flow structures and mechanism inside the turbine cascade.

关键词： Stereoscopic PIV, turbine cascade, tip leakage vortex, horseshoe vortex

Roll-to-roll printing trench-like metasurface film for radiative cooling

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Light(Science & Applications) 2023年第12期12卷 2538-2539页

作者： Yaoguang ma State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational ResearchCenter for Advanced PhotonicsZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311215China Jiaxing Key Laboratory of Photonic Sensing&Intelligent Imaging Intelligent Optics&Photonics Research CenterJiaxing Research InstituteZhejiang UniversityJiaxing 314000China

A Roll-to-roll technology can enable the fabrication of trench-like photonic meta-structures that are strongly absorptive in the MIR region,providing a controllable optical response for diurnal radiative cooling.

关键词： trench radiative printing

Elasticity meets topology

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National Science Review 2024年第6期11卷 84-85页

作者： Guancong ma Department of Physics Hong Kong Baptist University

We are surrounded by environments and items that are made from solid materials in our daily life. Any physical contact with any items is a mechanical disturbance that produces mechanical *** underlines the crucial role that such vibrations play in our daily interactions,highlighting the need for a deeper understanding and improved manipulation of these fundamental phenomena.

关键词： topology elasticity meets

Local spatial properties based image interpolation scheme using SVMs

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Journal of Systems Engineering and Electronics 2008年第3期19卷 618-623页

作者： ma Liyong Shen Yi ma Jiachen School of Information Science and Engineering Harbin Inst. of Technology Weihai 264209 P. R. China

Image interpolation plays an important role in image process applications. A novel support vector machines （SVMs） based interpolation scheme is proposed with increasing the local spatial properties in the source image as SVMs input patterns. After the proper neighbor pixels region is selected, trained support vectors are obtained by training SVMs with local spatial properties that include the average of the neighbor pixels gray values and the gray value variations between neighbor pixels in the selected region. The support vector regression machines are employed to estimate the gray values of unknown pixels with the neighbor pixels and local spatial properties information. Some interpolation experiments show that the proposed scheme is superior to the linear, cubic, neural network and other SVMs based interpolation approaches.

关键词： image processing interpolation support vector machines local spatial properties support vectorregression.