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Finite-Time Distributed Identification for Nonlinear Interconnected Systems

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IEEE/CAA Journal of Automatica Sinica 2022年第7期9卷 1188-1199页

作者： Farzaneh Tatari Hamidreza Modares Christos Panayiotou Marios Polycarpou Mechanical Engineering Department Michigan State UniversityEast LansingMI 48824 USA KIOS Research and innovation Center of excellence and the Department of Electrical and Computer Engineering University of CyprusNicosia 1678Cyprus IEEE

In this paper,a novel finite-time distributed identification method is introduced for nonlinear interconnected systems.A distributed concurrent learning-based discontinuous gradient descent update law is presented to learn uncertain interconnected subsystems’*** concurrent learning approach continually minimizes the identification error for a batch of previously recorded data collected from each subsystem as well as its neighboring *** state information of neighboring interconnected subsystems is acquired through direct *** overall update laws for all subsystems form coupled continuous-time gradient flow dynamics for which finite-time Lyapunov stability analysis is *** a byproduct of this Lyapunov analysis,easy-to-check rank conditions on data stored in the distributed memories of subsystems are obtained,under which finite-time stability of the distributed identifier is *** rank conditions replace the restrictive persistence of excitation(PE)conditions which are hard and even impossible to achieve and verify for interconnected ***,simulation results verify the effectiveness of the presented distributed method in comparison with the other methods.

关键词： Distributed concurrent learning finite-time identification nonlinear interconnected systems unknown dynamics

Scalable Distributed Sensor Fault Diagnosis for Smart Buildings

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IEEE/CAA Journal of Automatica Sinica 2020年第3期7卷 638-655页

作者： Panayiotis M.Papadopoulos Vasso Reppa Marios M.Polycarpou Christos G.Panayiotou IEEE KIOS Research and innovation Center of excellence Department of Electrical and Computer EngineeringUniversity of CyprusNicosia 1678Cyprus Department of Maritime and Transport Technology Delft University of TechnologyDelft2628 CDThe Netherlands

The enormous energy use of the building sector and the requirements for indoor living quality that aim to improve occupants' productivity and health, prioritize Smart Buildings as an emerging technology. The Heating, Ventilation and Air-Conditioning(HVAC) system is considered one of the most critical and essential parts in buildings since it consumes the largest amount of energy and is responsible for humans comfort. Due to the intermittent operation of HVAC systems, faults are more likely to occur, possibly increasing eventually building's energy consumption and/or downgrading indoor living quality. The complexity and large scale nature of HVAC systems complicate the diagnosis of faults in a centralized framework. This paper presents a distributed intelligent fault diagnosis algorithm for detecting and isolating multiple sensor faults in large-scale HVAC *** the HVAC system as a network of interconnected subsystems allows the design of a set of distributed sensor fault diagnosis agents capable of isolating multiple sensor faults by applying a combinatorial decision logic and diagnostic reasoning. The performance of the proposed method is investigated with respect to robustness, fault detectability and scalability. Simulations are used to illustrate the effectiveness of the proposed method in the presence of multiple sensor faults applied to a 83-zone HVAC system and to evaluate the sensitivity of the method with respect to sensor noise variance.

关键词： Building automation fault diagnosis fault location smart homes

Higher-order properties and extensions for indirect MRAC and APPC of linear systems

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Science China(Information Sciences) 2024年第4期67卷 218-238页

作者： Yanjun ZHANG Zhipeng ZHANG Jian SUN Lei WANG Kangkang ZHANG National Key Lab of Autonomous Intelligent Unmanned Systems Beijing Institute of Technology School of Automation Beijing Institute of Technology Beijing Institute of Technology Chongqing innovation Center College of Control Science and Engineering Zhejiang University Department of Electrical and Electronic Engineering Imperial College London KIOS Research and innovation Center of excellence University of Cyprus

Recently, a reference derived some new higher-order output tracking properties for direct model reference adaptive control（MRAC） of linear time-invariant（LTI） systems: limt→∞ e（i）（t） = 0, i = 1,..., n*-1, where n*and e（i）（t） denote the relative degree of the system and the i-th derivative of the output tracking error, respectively. However, a naturally arising question involves whether indirect adaptive control（including indirect MRAC and indirect adaptive pole placement control） of LTI systems still has higher-order tracking properties. Such properties have not been reported in the literature. Therefore, this paper provides an affirmative answer to this question. Such higher-order tracking properties are new discoveries since they hold without any additional design conditions and, in particular, without the persistent excitation condition. Given the higher-order properties, a new adaptive control system is developed with stronger tracking features.（1） It can track a reference signal with any order derivatives being unknown.（2） It has higher-order exponential or practical output tracking properties.（3） Finally, it is different from the usual MRAC system, whose reference signal's derivatives up to the n*order are assumed to be known. Finally, two simulation examples are provided to verify the theoretical results obtained in this paper.

关键词： higher-order tracking indirect adaptive control model reference adaptive control adaptive pole placement control

Screen-Printable Functional Nanomaterials for Flexible and Wearable Single-Enzyme-Based Energy-Harvesting and Self-Powered Biosensing Devices

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Nano-Micro Letters 2023年第6期15卷 254-269页

作者： Kornautchaya Veenuttranon Kanyawee Kaewpradub Itthipon Jeerapan Center of excellence for Trace Analysis and Biosensor Prince of Songkla UniversityHat YaiSongkhla 90110Thailand Division of Physical Science Faculty of SciencePrince of Songkla UniversityHat YaiSongkhla 90110Thailand Center of excellence for innovation in Chemistry Faculty of SciencePrince of Songkla UniversityHat YaiSongkhla 90110Thailand

Developing flexible bioelectronics is essential to the realization of artificial intelligence devices and biomedical applications, such as wearables, but their potential is limited by sustainable energy supply. An enzymatic biofuel cell(BFC) is promising for power supply, but its use is limited by the challenges of incorporating multiple enzymes and rigid platforms. This paper shows the first example of screen-printable nanocomposite inks engineered for a single-enzyme-based energy-harvesting device and a self-powered biosensor driven by glucose on bioanode and biocathode. The anode ink is modified with naphthoquinone and multiwalled carbon nanotubes(MWCNTs), whereas the cathode ink is modified with Prussian blue/MWCNT hybrid before immobilizing with glucose oxidase. The flexible bioanode and the biocathode consume glucose. This BFC yields an open circuit voltage of 0.45 V and a maximum power density of 266 μW cm-2. The wearable device coupled with a wireless portable system can convert chemical energy into electric energy and detect glucose in artificial sweat. The self-powered sensor can detect glucose concentrations up to 10 mM. Common interfering substances,including lactate, uric acid, ascorbic acid, and creatinine, have no effect on this self-powered biosensor. Additionally, the device can endure multiple mechanical deformations. New advances in ink development and flexible platforms enable a wide range of applications, including on-body electronics, self-sustainable applications, and smart fabrics.

关键词： Screen-printable nanocomposites Glucose Glucose oxidase Biofuel cells Self-powered biosensors Flexible bioelectronics

Bioavailability of nanomaterials:bridging the gap between nanostructures and their bioactivity

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National Science Review 2022年第10期9卷 59-62页

作者： Mingjing Cao Chunying Chen CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety and CAS Center for excellence in Nanoscience National Center for Nanoscience and Technology of China University of Chinese Academy of Sciences The GBA National Institute for Nanotechnology innovation

Nanomaterials (NMs) have enormous potential as nanomedicines for diagnosing and fighting various *** make every endeavor to design diverse nanomedicines with novel nanostructures and smart *** stable are nanomedicines before and after exerting their functions at target sites?What can we do to maximizethe efficiency of nanomedicines?These questions have concerned researchers over the past two *** in vivo metabolic processes of nanomaterials are a key factor in understanding the safety and efficacy (end point)of *** of these processes may bridge the gap between the cradle (structure design)and end point (efficacy and/or safety) of *** possible metabolic phenomena have been revealed so far for NMs [1,2]:their elimination through renal and hepatobiliary systems,their interception in the mononuclear phagocyte system (MPS),their biodegradation and utilization in the liver and,finally,their excretion from the body after a gradual breakdown.

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Supercontinuum Lightwave Sources for Photonic networks

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光学学报 2003年第S1期23卷 733-734页

作者： Kunihiko Mori NTT network innovation Laboratories NTT Corporation 1-1 Hikari-no-oka Yokosuka Kanagawa 239-0847 Japan

WDM optical sources based on supercontinuum (SC) generation are reviewed. The design of an SC lightwave source is described that uses a scaling rule among the parameters in an SC generating fiber and a seed optical pu... 详细信息

关键词： for in et on SC Supercontinuum Lightwave Sources for Photonic networks WDM

Apoptotic activity of caged xanthones from Garcinia hanburyi in cholangiocarcinoma cell lines

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World Journal of Gastroenterology 2010年第18期16卷 2235-2243页

作者： Chariya Hahnvajanawong Wongwarut Boonyanugomol Tapanawan Nasomyon Watcharin Loilome Nisana Namwat Natthinee Anantachoke Wichittra Tassaneeyakul Banchob Sripa Wises Namwat Vichai Reutrakul Department of Microbiology Center of Excellence for Innovation in Chemistryand Liver Fluke and Cholangiocarcinoma Research CenterFaculty of MedicineKhon Kaen University Department of Biochemistry Faculty of MedicineKhon Kaen University Department of Pharmacognosy Faculty of PharmacyMahidol University Department of Pharmacology Faculty of MedicineKhon Kaen University Department of Pathology Faculty of MedicineKhon Kaen University Department of Chemistry and Center of Excellence for Innovation in ChemistryFaculty of ScienceMahidol University

AIM:To investigate the growth inhibitory mechanism of four caged xanthones from Garcinia hanburyi in cholangiocarcinoma(CCA) KKU-100 and KKU-M156 ***:Four caged xanthones,selected on the basis of their anticancer potency and chemical structure diversities(***,isomorellinol,forbesione and gambogic acid) were used in this *** inhibition of these caged xanthones was determined using the sulforhodamine B *** of apoptosis was assessed by observing cell morphology,ethidium bromide and acridine orange staining and DNA fragmentation *** of apoptotic-related gene and protein expressions were determined by a real-time reverse transcriptase polymerase chain reaction and Western blotting analysis,***:The compounds were found to inhibit growth of both cell lines in a dose-dependent manner and also showed selective cytotoxicity against the cancer cells when compared with normal peripheral blood mononuclear *** suppression by these compounds was due to apoptosis,as evidenced by the cell morphological changes,chromatin condensation,nuclear fragmentation,and DNA ladder *** the molecular level,these compounds induced down-regulation of Bcl-2 and survivin proteins with up-regulation of Bax and apoptosisinducing factor proteins,leading to the activation of caspase-9 and-3 and DNA *** functional group variations did not appear to affect the anticancer activity with regard to the two CCA cell lines;however,at a mechanistic level,isomorellinol exhibited the highest potency in increasing the Bax/Bcl-2 protein expression ratio(120 and 41.4 for KKU-100 and KKU-M156,respectively) and in decreasing survivin protein expression(0.01 fold as compared to control cells in both cell lines).Other activities at the molecular level indicate that functional groups on the prenyl side chain may be ***:Our findings for the first time demonstrate that four caged xanthones induce apoptosis in

关键词： Garcinia hanburyi Caged xanthones Human cholangiocarcinoma cell lines Apoptosis

Ploidy-, gender-, and dose-dependent alteration of selected biomarkers in Clarias gariepinus treated with benzo[a]pyrene

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Journal of Environmental Sciences 2015年第12期27卷 95-102页

作者： Ali Karami Swee J.Teh Mohamad Pauzi Zakaria Simon C.Courtenay Laboratory of Aquatic Toxicology Faculty of Medicine and Health SciencesUniversiti Putra Malaysia School of Veterinary Medicine Department of AnatomyPhysiologyand Cell BiologyUniversity of California Centre of excellence for Environmental Forensics Faculty of Environmental StudiesUniversiti Putra Malaysia Department of Environment and Resource Studies Canadian Water NetworkCanadian Rivers InstituteUniversity of Waterloo

Naturally-occurring and artificially-induced polyploids have been documented in various fish species but to date no comparison has been reported of the impacts of ploidy on fish biomarker responses to organic *** study describes effects of ploidy,gender,and dose on biliary fluorescent aromatic compound（FAC） concentrations,hepatic ethoxyresorufin-O-deethylase（EROD） and glutathione S-transferase（GST） activities in one of the most commonly cultured warm-water species,the African catfish Clarias *** matured male and female diploid and triploid fish were intraperitoneally（i.p.）injected with 0,5 or 25 mg/kg benzo[a]pyrene（BaP） and liver and gallbladder were sampled48 hr *** significant differences were found between ploidies in bile concentrations of7,8 dihydrodiolbenzo[a]pyrene（7,8D BaP）,1-hydroxybenzo[a]pyrene（1-OH BaP） or3-hydroxybenzo[a]pyrene（3-OH BaP）.However,concentrations of the biliary FACs did differ between males and females at different dose of injection with generally higher concentrations in females at the low dose of BaP and higher concentrations in males at the higher BaP *** EROD activity did not exhibit gender-dependent difference,whereas it was significantly higher in triploids than *** activities were not significantly influenced by any of the tested *** work advanced our understanding of the role of ploidy,gender,and dose in biotransformation of pollutants in fish.

关键词： Triploid Diploid Male Female Fish biomarkers

Emergence of classical objectivity of quantum Darwinism in a photonic quantum simulator

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Science Bulletin 2019年第9期64卷 580-585页

作者： Ming-Cheng Chen Han-Sen Zhong Yuan Li Dian Wu Xi-Lin Wang Li Li Nai-Le Liu Chao-Yang Lu Jian-Wei Pan Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China CAS Centre for excellence and Synergetic innovation Centre in Quantum Information and Quantum Physics University of Science and Technology of China

Quantum-to-classical transition is a fundamental open question in physics frontier. Quantum decoherence theory points out that the inevitable interaction with environment is a sink carrying away quantum coherence, which is responsible for the suppression of quantum superposition in open quantum ***, quantum Darwinism theory further extends the role of environment, serving as communication channel, to explain the classical objectivity emerging in quantum measurement process. Here, we used a six-photon quantum simulator to investigate classical and quantum information proliferation in quantum Darwinism process. In the simulation, many environmental photons are scattered from an observed quantum system and they are collected and used to infer the system's state. We observed redundancy of system's classical information and suppression of quantum correlation in the fragments of environmental photons. Our results experimentally show that the classical objectivity of quantum system can be established through quantum Darwinism mechanism.

关键词： Quantum measurement Quantum Darwinism Hovelo bound Quantum discord Single photons