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SSRN 2023年

作者： He, Yu Lu, Zefan Liu, Ke Wang, Lan Xu, Qiudi Fan, Hongliang Liu, Chong Zhang, Tao Research Center for Analytical Instrumentation Institute of Cyber-Systems and Control State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou310023 China Huzhou Institute of Zhejiang University Huzhou313002 China School of Public Health Hangzhou Medical College Hangzhou311399 China Department of Neurobiology Department of Neurosurgery Second Affiliated Hospital School of Medicine Zhejiang University Hangzhou310023 China

Microfluidics-based digital PCR (dPCR) is a potent technique capable of absolute quantification of nucleic acids with ultrahigh sensitivity. However, an indispensable process, nucleic acid extraction (NAE) remains hard to be integrated with dPCR into a monolithic device, because both of them involve complicated processes and exquisite fluid manipulation. An ideal solution to this issue is to integrate the two main microfluidic platforms, channel-based microfluidics (CMF) and digital microfluidics (DMF), which, however, remains very challenging. To address these challenges, we herein develop a photofabricated channel-digital microfluidic chip (pCDMF) with significant advantages including: the fabrication of pCDMF is very convenient due to the flexible material choices of photocuring, without tedious process of hydrophobic coating;a parallel-plate configuration can be easily formed, enabling all basic functions of DMF;various channels and microstructures can be freely designed, allowing for fluidic functions of CMF. It is therefore the first example of full integration of DMF and CMF as a monolithic device, with capabilities to precisely handle both discrete droplets and continuous fluids. Finally, an all-in-one device for sample-to-answer digital PCR has been successfully demonstrated. We also envisioned that the pCDMF may open an alternative route toward the fully integrated lab-on-a-chip for various biological applications. © 2023, The Authors. All rights reserved.

关键词： Digital microfluidics

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Quantum Approximate Optimization Algorithm in Non-Markovian Quantum systems

arXiv

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arXiv 2022年

作者： Yue, Bo Xue, Shibei Pan, Yu Jiang, Min Department of Automation Shanghai Jiao Tong University The Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control College of Control Science and Engineering Zhejiang University Hangzhou310027 China School of Electronics and Information Engineering Soochow University Suzhou215006 China

Although quantum approximate optimization algorithm (QAOA) has demonstrated its quantum supremacy, its performance on Noisy Intermediate-Scale Quantum (NISQ) devices would be influenced by complicated noises, e.g., quantum colored noises. To evaluate the performance of QAOA under these noises, this paper presents a framework for running QAOA on non-Markovian quantum systems which are represented by an augmented system model. In this model, a non-Markovian environment carrying quantum colored noises is modelled as an ancillary system driven by quantum white noises which is directly coupled to the corresponding principal system;i.e., the computational unit for the algorithm. With this model, we mathematically formulate QAOA as piecewise Hamiltonian control of the augmented system, where we also optimize the control depth to fit into the circuit depth of current quantum devices. For efficient simulation of QAOA in non-Markovian quantum systems, a boosted algorithm using quantum trajectory is further presented. Finally, we show that non-Markovianity can be utilized as a quantum resource to achieve a relatively good performance of QAOA, which is characterized by our proposed exploration rate. Copyright © 2022, The Authors. All rights reserved.

关键词： White noise

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Consistent and Asymptotically Efficient Localization from Range-Difference Measurements

arXiv

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arXiv 2023年

作者： Zeng, Guangyang Mu, Biqiang Shi, Ling Chen, Jiming Wu, Junfeng The School of Data Science Chinese University of Hong Kong Shenzhen Shenzhen China The Department of Automation University of Science and Technology of China Hefei China Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing100190 China The Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong The College of Control Science and Engineering The State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou310027 China

We consider signal source localization from range-difference measurements. First, we give some readily-checked conditions on measurement noises and sensor deployment to guarantee the asymptotic identifiability of the model and show the consistency and asymptotic normality of the maximum likelihood (ML) estimator. Then, we devise an estimator that owns the same asymptotic property as the ML one. Specifically, we prove that the negative log-likelihood function converges to a function, which has a unique minimum and positive definite Hessian at the true source's position. Hence, it is promising to execute local iterations, e.g., the Gauss-Newton (GN) algorithm, following a consistent estimate. The main issue involved is obtaining a preliminary consistent estimate. To this aim, we construct a linear least-squares problem via algebraic operation and constraint relaxation and obtain a closed-form solution. We then focus on deriving and eliminating the bias of the linear least-squares estimator, which yields an asymptotically unbiased (thus consistent) estimate. Noting that the bias is a function of the noise variance, we further devise a consistent noise variance estimator that involves 3-order polynomial rooting. Based on the preliminary consistent location estimate, a one-step GN iteration suffices to achieve the same asymptotic property as the ML estimator. Simulation results demonstrate the superiority of our proposed algorithm in the large sample case. Copyright © 2023, The Authors. All rights reserved.

关键词： Iterative methods

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Serrated chip formation in machining of difficult to cut metallic materials: a comprehensive review

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Critical Reviews in Solid state and Materials Sciences 2025年

作者： Zhao, Zejia Liu, Chujun Xu, Bo Wang, Jingwei Yao, Yingxue Yin, Tengfei To, Suet Yang, Yang Institute of Semiconductor Manufacturing Research College of Mechatronics and Control Engineering Shenzhen University Shenzhen China State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Kowloon Hong Kong Department of Materials Science Shenzhen MSU-BIT University Shenzhen China Shenzhen China

Serrated cutting chips are usually observed in the machining of difficult to cut metallic materials such as titanium alloys, steels, and nickel-based alloys. Understanding the formation mechanism and influencing factors to generate serrated chips is meaningful for improving the machinability of the difficult to cut materials since the formation of serrated chips poses high risks on the vibration of cutting tools and further affects the surface quality of the workpiece. To date, extensive studies have been conducted on the investigation of serrated chip formation in the machining of difficult to cut materials, but there is still a lack of a comprehensive review to clarify the formation mechanism and summarize the factors affecting the serrated chip characteristics. In this review, two commonly used mechanisms, i.e., adiabatic shear band (ASB) theory and periodical crack formation (PCF) theory, are summarized and discussed with respect to theoretical analyses and experimental verifications. Serrated chip formation in different difficult to cut alloys was also systematically reviewed, considering materials inherent properties such as high hardness, poor thermal conductivity, or low fracture toughness. Besides, some critical factors, including cutting speeds, feed rates, cutting tools, external energy sources, humidity, and temperature are highlighted to illustrate their effects on the serrated chip formation. In addition, challenges and perspectives about the serrated chip formation in machining of difficult to cut metallic materials are proposed to give instruction to future research. © 2025 Taylor & Francis Group, LLC.

关键词： Titanium alloys

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Dynamic collision avoidance for cooperative fixed-wing UAV swarm based on normalized artificial potential field optimization

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Journal of Central South University 2021年第10期28卷 3159-3172页

作者： LIU Wei-heng ZHENG Xin DENG Zhi-hong State Key Laboratory of Intelligent Control and Decision of Complex Systems School of AutomationBeijing Institute of TechnologyBeijing 100081China China Aerospace Science and Industrial Corporation Beijing 100048China

Cooperative path planning is an important area in fixed-wing UAV ***,avoiding multiple timevarying obstacles and avoiding local optimum are two challenges for existing approaches in a dynamic ***,a normalized artificial potential field optimization is proposed by reconstructing a novel function with anisotropy in each dimension,which can make the flight speed of a fixed UAV swarm independent of the repulsive/attractive gain coefficient and avoid trapping into local optimization and local ***,taking into account minimum velocity and turning angular velocity of fixed-wing UAV swarm,a strategy of decomposing target vector to avoid moving obstacles and pop-up threats is ***,several simulations are carried out to illustrate superiority and effectiveness.

关键词： fixed-wing UAV swarm cooperative path planning normalized artificial potential field dynamic obstacle avoidance local optimization

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Oxidation of emerging organic contaminants by in-situ H_(2)O_(2) fenton system

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Green Energy & Environment 2024年第3期9卷 417-434页

作者： Yuqin Ni Chuxiang Zhou Mingyang Xing Yi Zhou State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes School of Resources&Environmental EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Advanced Materials and Institute of Fine Chemicals National Engineering Laboratory for Industrial Wastewater TreatmentSchool of Chemistry and Molecular EngineeringEast China University of Science and Technology130 Meilong RoadShanghai200237China Department of Applied Natural Sciences Technische Hochschule LubeckMonkhofer Weg 23923562 LubeckGermany

The existence and risk of emerging organic contaminants(EOCs)have been under consideration and paid much effort to degrade these *** system is one of the most widely used technologies to solve this *** original Fenton system relies on the hydroxyl radicals produced by Fe(Ⅱ)/H_(2)O_(2) to oxidize the organic ***,the application of the Fenton system is limited by its low iron cycling efficiency and the high risks of hydrogen peroxide transportation and *** introduction of external energy(including light and electricity etc.)can effectively promote the Fe(Ⅲ)/Fe(Ⅱ)cycle and the reduction of oxygen to produce hydrogen peroxide in *** review introduces three in-situ Fenton systems,which are electro-Fenton,Photo-Fenton,and chemical *** mechanism,influencing factors,and catalysts of these three in-situ Fenton systems in degrading EOCs are discussed *** review strengthens the understanding of Fenton and in-situ Fenton systems in degradation,offering further insight into the real application of the in-situ Fenton system in the removal of EOCs.

关键词： In-situ H_(2)O_(2)production Fenton Emerging organic contaminants Photocatalysis Electrocatalysis

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A Novel Approach Based on Modified and Hybrid Flower Pollination Algorithm to Solve Multi-objective Optimal Power Flow

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IAENG International Journal of Applied Mathematics 2021年第4期51卷 1-18页

作者： Chen, Gonggui Qin, Qilin Zhou, Ping Kang, Peng Zeng, Xianjun Long, Hongyu Zou, Mi Professor of Key Laboratory of Industrial Internet of Things and Networked Control Ministry of Education Chongqing University of Posts and Telecommunications Chongqing400065 China Chongqing Key Laboratory of Complex Systems and Bionic Control Chongqing University of Posts and Telecommunications Chongqing400065 China Master degree candidate of Chongqing University of Posts and Telecommunications Chongqing400065 China Senior engineer of Economic and Technology Research Institute State Grid Chongqing Electric Power Company Chongqing401120 China Senior engineer of State Grid Chongqing Electric Power Company Chongqing400015 China Professor level senior engineer of Chongqing Key Laboratory of Complex Systems and Bionic Control Chongqing University of Posts and Telecommunications Chongqing400065 China Assistant professor of Chongqing Key Laboratory of Complex Systems and Bionic Control Chongqing University of Posts and Telecommunications Chongqing400065 China

In this paper, a modified and hybrid flower pollination algorithms (MHFPA) is proposed for dealing with the multi-objective optimal power flow (MOOPF) problem with conflictive objectives. The algorithm combines the mutation and crossover process in the differential evolution (DE) algorithm, introduces the sinusoidal nonlinear dynamic switching probability (SNDSP) and the elite strategy of elder generation (ESEG), which can improve the shortcomings of the original pollen algorithm that it is easy to fall into the local optimum and the diversity is insufficient. A screening approach with Pareto-dominant rule (SAPR) is proposed to ensure that the state variable can satisfy the inequality constraints of the power system. A uniformly distributed Pareto optimal set (POS) is obtained by the non-dominant sorting with elite strategy (NSES) based on Rank and Density estimation, and the best trade-off solution (BTS) is determined from the POS obtained by the fuzzy affiliation theory. For practicality, the total fuel cost, active power loss, emissions and voltage deviation are selected as objective functions. Due to the limitations of the actual power system, the valve point effect is also considered. The IEEE30-, 57- and IEEE118-bus test systems are used to verify the performance of the proposed MHFPA. In addition, two © 2021. All Rights Reserved.

关键词： Electric load flow

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Passivity-Based PI control for AGVs Wireless Power Transfer System

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IFAC-PapersOnLine 2020年第2期53卷 5801-5806页

作者： Jia Liu Zhitao Liu Hongye Su State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

Automatic guided vehicles (AGVs) recently have gained increasing attentions and applications, however, frequently stopping to recharge largely reduces service efficiency. Wireless power transfer (WPT) is considered as a practice energization way to solve this problem. In this paper, a passivity-based controller (PBC) and parameter designing method for compensation topology are proposed for AGVs WPT system. The PBC based on port-controlled Hamiltonian system (PCHS) is designed to achieve desired constant systematic working power by regulating the output voltage of DC/DC converter. The LCC-LCC resonant network is analyzed in the principle of the impedance matching method, and a proportional integral (PI) controller is implemented to realize zero steady-state error. Simulation are carried out in PLECS to verify analysis, and results show that proposed controller scheme and compensation designing method ensure the stability of the charging system against load variations, and the fast response performance of the control algorithm is also validated.

关键词： Automatic guided vehicles (AGVs) wireless power transfer (WPT) impedance matching method DC/DC converter passivity-based control (PBC)

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Data-Driven control of Distributed Event-Triggered Network systems

arXiv

引用

arXiv 2022年

作者： Wang, Xin Sun, Jian Wang, Gang Allgöwer, Frank Chen, Jie State Key Lab of Intelligent Control and Decision of Complex Systems School of Automation Beijing Institute of Technology Beijing100081 China Beijing Institute of Technology Chongqing Innovation Center Chongqing401120 China Institute for Systems Theory and Automatic Control University of Stuttgart Stuttgart70550 Germany Department of Control Science and Engineering Tongji University Shanghai201804 China State Key Lab of Intelligent Control and Decision of Complex Systems School of Automation Beijing Institute of Technology Beijing100081 China

The present paper deals with data-driven event-triggered control of a class of unknown discrete-time interconnected systems (a.k.a. network systems). To this end, we start by putting forth a novel distributed event-triggering transmission strategy based on periodic sampling, under which a model-based stability criterion for the closed-loop network system is derived, by leveraging a discrete-time looped-functional approach. Marrying the model-based criterion with a data-driven system representation recently developed in the literature, a purely data-driven stability criterion expressed in the form of linear matrix inequalities (LMIs) is established. Meanwhile, the data-driven stability criterion suggests a means for co-designing the event-triggering coefficient matrix and the feedback control gain matrix using only some offline collected state-input data. Finally, numerical results corroborate the efficacy of the proposed distributed data-driven ETS in cutting off data transmissions and the co-design procedure. Copyright © 2022, The Authors. All rights reserved.

关键词： Linear matrix inequalities

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Distributed Adaptive Fault-Tolerant Output Regulation of Heterogeneous Multi-Agent systems With Coupling Uncertainties and Actuator Faults

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IEEE/CAA Journal of Automatica Sinica 2020年第4期7卷 1098-1106页

作者： Chao Deng Weinan Gao Weiwei Che the School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore the Department of Electrical and Computer Engineering Allen E.Paulson College of Engineering and ComputingGeorgia Southern UniversityStatesboroGA 30460 USA the State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and ControlZhejiang UniversityHangzhou 310027 the Institute of Complexity Science Qingdao UniversityQingdao 266071China

In this paper, we consider the distributed adaptive fault-tolerant output regulation problem for heterogeneous multiagent systems with matched system uncertainties and mismatched coupling uncertainties among subsystems under the influence of actuator faults. First, distributed finite-time observers are proposed for all subsystems to observe the state of the exosystem. Then, a novel fault-tolerant controller is designed to compensate for the influence of matched system uncertainties and actuator faults. By using the linear matrix inequality technique, a sufficient condition is provided to guarantee the solvability of the considered problem in the presence of mismatched coupling uncertainties. Moreover, it is shown that the system in closed-loop with the developed controller can achieve output regulation by using the Lyapunov stability theory and cyclic-small-gain ***, a numerical example is given to illustrate the effectiveness of the obtained result.

关键词： Adaptive control cyclic-small-gain fault-tolerant control multi-agent systems(MASs)

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