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A NEW CHARACTERIZATION OF FIXED MODES FOR DECENTRALIZED CONTROL SYSTEMS

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Systems Science and Mathematical Sciences 1989年第2期2卷 161-169页

作者：储德林 Tsinghua University BeijingChina

In this paper,a study of the characterization of fixed modes in decentralized control ismade.A new sufficient and necessary condition for the existence of fixed modes is obtained by meansof the generalized eigenvalue theory of matrix pairs,and the computability of the new condition *** results show that fixed modes can be computed in a reliable and efficient manner.

关键词： Decentvalized control Fixed mode Matrex pair Generalized eigenvalue Yegulavity

PARALLE DOMAIN DECOMPOSITION ALGORITHMS FOR A GENERALIZED STOKES PROBLEM

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Systems Science and Mathematical Sciences 1994年第2期7卷 153-168页

作者： chu delin ZHOU Fangjun(Department of Applied Mathematics, Tsinghua University, Beijing 100084, China)

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关键词： Domain decomposition trace average operator convergence condition number a generalized Stokes problem.

CAMC Focused Section on Tensor Computation

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Communications on Applied Mathematics and Computation 2021年第2期3卷 199-199页

作者： delin chu Michael Ng Liqun Qi Qing-Wen Wang National University of Singapore Singapore 119077Singapore The University of Hong Kong Pok Fu Lam 999077Hong KongChina Hangzhou Dianzi University Hangzhou 310018China Shanghai University Shanghai 200444China

Tensors are multi-arrays with more than two *** the last decade or so,many con-cepts and results in matrix theory-some of which are nontrivial-have been extended to tensors and have a wide range of *** present focused section entitled"tensor computation"in Communications on Applied Mathematics and Computation(CAMC)covers tensors in inversion,principal component analysis,spectral hyperspectral theory,decompositions,and rank *** do hope this focused section can offer fresh stimuli for the community of tensor computation and theory to promote and develop cutting-edge research in this important field.

关键词： structure. field. tensor

Continuous high-efficient water-electricity cogeneration over a hybrid solar-driven water evaporation system and the working mechanism

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Science China Materials 2024年第7期67卷 2371-2372页

作者： Dewei chu School of Materials Science and Engineering University of New South WalesSydneyNSW 2052Australia

With the escalation of industrialization and population growth,energy and clean water shortages pose an unprecedented threat to sustainable ***,it is imperative to develop green and effective strategies to address these *** this context,solar-driven interfacial water evaporation(SIWE)has emerged as a highly promising low-carbon solution to the water-energy nexus[1].By locating the evaporator at airwater interfaces,heat localization can be achieved,leading to high-efficient water evaporation and freshwater *** significantly,taking advantage of the special conditions during SIWE has opened numerous opportunities for generation of extra electrical power[2,3].Throughout the processes of SIWE,various elements such as photons,waves,capillary flow,evaporation,vapor motions,condensation,and droplet sliding can all be harnessed to produce electricity through photovoltaic,thermoelectric,thermogalvanic,pyroelectric,piezoelectric,triboelectricity and hydrovoltaic effects[3].Extensive research efforts have provided valuable insights for the development of water-electricity cogeneration(WEG)hybrid systems.

关键词： mechanism evaporation piezoelectric

Paving the way toward soil safety and health:current status,challenges,and potential solutions

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 63-73页

作者： Chiheng chu Lizhong Zhu College of Environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China

Soil is a non-renewable resource,providing a majority of the world’s food and fiber while serving as a vital carbon ***,the health of soil faces global threats from human activities,particularly widespread contamination by industrial *** physical,chemical,and biological remediation approaches encounter challenges in preserving soil structure and function throughout the remediation process,as well as addressing the complexities of soil contamination on a regional *** solutions encompass monitoring and simulating soil processes,with a focus on utilizing big data to bridge micro-scale and macro-scale ***,reducing pollutant emissions to soil is paramount due to the significant challenges associated with removing contaminants once they have entered the soil,coupled with the high economic costs of ***,it is imperative to implement advanced remediation technologies,such as monitored natural attenuation,and embrace holistic soil management approaches that involve regulatory frameworks,soil health indicators,and soil safety monitoring *** the enduring health and resilience of soils necessitates a blend of interdisciplinary research,technological innovation,and collaborative initiatives.

关键词： Soil safety and health Source emission reduction Process monitoring and simulation Green remediation technology Soil health management

TDP-43 is a key molecule accelerating development of Alzheimer’s disease following traumatic brain injury

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Neural Regeneration Research 2024年第5期19卷 955-956页

作者： chu Chen Department of Cellular and Integrative Physiology Long School of MedicineUniversity of Texas Health Science Center at San AntonioSan AntonioTXUSA

Currently,more than 55 million people have dementia worldwide and Alzheimer’s disease(AD)is one of the most common causes of dementia in ***,no effective therapies are currently available for the prevention and treatment of *** is largely due to our limited understanding of the mechanisms underlying the neuropathogenesis of *** has widely been recognized that AD is heterogeneous and that multi-factors are contributing to the pathogenesis of *** evidence suggests that traumatic brain injury(TBI)is an important risk factor for the development of AD and dementia later in life(Guo et al.,2000;Johnson et al.,2010).However,the precise mechanism by which TBI contributes to developing AD has yet to be elucidated.

关键词： Alzheimer traumatic

Motor cortical circuit adaptations in parkinsonism

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Neural Regeneration Research 2024年第10期19卷 2107-2108页

作者： Hong-Yuan chu Department of Neurodegenerative Science Van Andel Research InstituteGrand RapidsMIUSA Aligning Science Across Parkinson’s(ASAP)Collaborative Research Network

Parkinson's disease is a chronic and progressive neurodegenerative disorder characterized by the loss of dopaminergic neurons in the substantia nigra pars compacta,which leads to the featured motor impairment of parki... 详细信息

关键词： parkin impairment rigidity

Resource Allocation to Minimize the Makespan with Multi-Resource Operations

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Journal of Systems Science & Complexity 2024年第5期37卷 2054-2070页

作者： WENG Wuyan chu Chengbin WU Peng School of Economics and Management Fuzhou UniversityFuzhou 350108China Univ Gustave Eiffel ESIEE Paris&COSYS-GRETTIAF-77454 Marne-la-ValléeFrance

This paper investigates a new resource-allocation problem involving multi-resource operations,where completing an operation requires simultaneous use of multiple(renewable)resources,probably of different *** goal of the study is to provide a solution method that minimizes the *** authors formulate the problem into a novel mixed-integer linear program(MILP)*** efficiently solve practical-sized instances,an exact Benders decomposition algorithm is *** algorithm divides the original problem into a master problem of allocating resources and a subproblem of calculating the makespan,and both are linked via Benders *** convergence is sped up by improving the mathematical model and embedding the variable neighborhood search *** with CPLEX,a commonly used MILP solver,the computational results demonstrate that the proposed algorithm provides tighter upper and lower bounds in most *** particular,compared with CPLEX,the proposed method can on average improve the upper and lower bounds by 4.76%and 4.39%,respectively,in solving practical-sized instances.

关键词： Benders decomposition multi-resources operations resource allocation

Process metallurgy and data-driven prediction and feedback of blast furnace heat indicators

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1228-1240页

作者： Quan Shi Jue Tang Mansheng chu School of Metallurgy Northeastern UniversityShenyang 110819China Institute for Frontier Technologies of Low-carbon Steelmaking Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education) Shenyang 110819China

The prediction and control of furnace heat indicators are of great importance for improving the heat levels and conditions of the complex and difficult-to-operate hour-class delay blast furnace(BF)*** this work,a prediction and feedback model of furnace heat indicators based on the fusion of data-driven and BF ironmaking processes was *** data on raw and fuel materials,process op-eration,smelting state,and slag and iron discharge during the whole BF process comprised 171 variables with 9223 groups of data and were comprehensively analyzed.A novel method for the delay analysis of furnace heat indicators was *** extracted delay variables were found to play an important role in *** method that combined the genetic algorithm and stacking efficiently im-proved performance compared with the traditional machine learning algorithm in improving the hit ratio of the furnace heat prediction *** hit ratio for predicting the temperature of hot metal in the error range of±10℃ was 92.4%,and that for the chemical heat of hot metal in the error range of±0.1wt%was 93.3%.On the basis of the furnace heat prediction model and expert experience,a feedback model of furnace heat operation was established to obtain quantitative operation suggestions for stabilizing BF heat *** sugges-tions were highly accepted by BF ***,the comprehensive and dynamic model proposed in this work was successfully ap-plied in a practical BF *** improved the BF temperature level remarkably,increasing the furnace temperature stability rate from 54.9%to 84.9%.This improvement achieved considerable economic benefits.

关键词： blast furnace furnace heat genetic algorithm stacking prediction and feedback