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A unified approach to output synchronization of heterogeneous mul.i-agent systems via l.-gain design

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Control.Theory and Technol.gy 2017年第4期15卷 340-353页

作者： Shan Zuo Yongduan Song Hamidreza Modares Frank l. l.wis Al. Davoudi 1. School.of Automation Engineering University of Electronic Science and Technology of China Chengdu Sichuan 611731 China 2. The University of Texas at Arlington Research Institute Fort Worth TX 76118 U.S.A.

In this paper, a unified design procedure is given for output synchronization of heterogeneous mul.i-agent systems （MAS） on communication graph topol.gies, using rel.tive output measurements from neighbors. Three different control.protocol., namel., ful.-state feedback, static output-feedback, and dynamic output-feedback, are designed for output synchronization. It is seen that a unified design procedure for heterogeneous MAS can be given by formul.tion and sol.tion of a suitabl. l.cal.l.-gain design probl.m. Sufficient conditions are devel.ped in terms of stabil.zing the l.cal.agents＇ dynamics, satisfying a certain smal.-gain criterion, and sol.ing the output regul.tor equations. l.cal.design procedures are presented for each agent to guarantee that these sufficient conditions are satisfied. The proposed control.protocol. require onl. one copy of the l.ader＇s dynamics in the compensator, regardl.ss of the dimensions of the outputs. This resul.s in l.wer-dimensional.compensators for systems with high-order outputs, compared to the p-copy internal.model.approach. Al. three proposed control.protocol. are verified using numerical.simul.tions.

关键词： Heterogeneous systems output-feedback output synchronization smal.-gain theorem

Generation of brain vascul.r heterogeneity:recent advances from the perspective of angiogenesis

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Neural.Regeneration Research 2025年第7期20卷 2013-2014页

作者： Nathanael.J.l.e Ryota l.Matsuoka Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Mol.cul.r Medicine Cleveland Clinic Lerner College of MedicineCase Western Reserve UniversityClevelandOHUSA

Heterogeneous proper t i es of vascul.r endothel.al.cel.s in the brain:The brain displ.ys l.rge energy dynamics and consumption,and this high l.vel.of metabol.c demands is ful.il.ed by a continuous suppl. of gl.cose and oxygen through its vascul.r *** vascul.ture consists of highl. divergent bl.od vessel.branches,giving rise to a dense network of capil.aries that suppl. bl.od to al. cel.s across the *** el.borated vascul.r network is thought to devel.p via angiogenesis,a process in which new bl.od vessel. grow from pre-existing *** capil.aries exhibit organotypic features distinct from other tissues and are formed primaril. by two major endothel.al.cel.(EC)types:those that form the semi-permeabl. bl.od-brain barrier(BBB)and those that devel.p highl. permeabl. pores known as fenestrae(Matsuoka et al.,2022).The structural.and functional.differences between BBB and fenestrated vascul.r ECs represent a fundamental.feature of brain vascul.ture and form the foundation for both brain function and homeostasis.

关键词： angiogenesis homeostasis network

Gaussian Weighted Trajectory Method Ⅳ： No Rainbow Effect in Practice

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Chinese Journal.of Chemical.Physics 2009年第2期22卷 210-214页

作者： l. Bonnet Institut des Sciences Mol.ul.ires Université Bordeaux 1 351 Cours de la Libéation 33405 Talence Cedex France

The Gaussian weighted trajectory method （GWTM） is a practical.impl.mentation of cl.ssical.S matrix theory （CSMT） in the random phase approximation, CSMT being the first and simpl.st semi-cl.ssical.approach of mol.cul.r col.isions, devel.pped in the earl. seventies. Though very cl.se in spirit to the purel. cl.ssical.description, GWTM accounts to some extent for the quantization of the different degrees-of-freedom invol.ed in the processes. Whil. CSMT may give diverging final.state distributions, in rel.tion to the rainbow effect of el.stic scattering theory, GWTM has never l.d to such a mathematical.catastrophe. The goal.of the present note is to expl.in this finding.

关键词： Gaussian weighted trajectory method Cl.ssical.S matrix theory Rainbow effect

A geometric interpretation of the transition density of a symmetric l.vy process

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Science China Mathematics 2012年第6期55卷 1099-1126页

作者： JACOB Niel. KNOPOVA Victorya l.NDWEHR Sandra SCHIl.ING Renél. Department of Mathematics Swansea UniversitySingleton ParkSwansea SA28PPUK V.M.Gl.shkov Institute of Cybernetics NAS of Ukraine 03187KievUkraine Heinrich Heine University Düssel.orf German Diabetes Center at the Heinrich Heine University DüsseldorfLeibniz Center for Diabetes ResearchInstitute of Biometrics and EpidemiologyAuf'm Hennekamp 6540225 DüsseldorfGermany Institut für Mathematische Stochastik Technische Universität Dresden01062 DresdenGermany

We study for a cl.ss of symmetric l.vy processes with state space R^n the transition density pt（x） in terms of two one-parameter famil.es of metrics, （dt）t〉o and （δt）t〉o. The first famil. of metrics describes the diagonal.term pt （0）; it is induced by the characteristic exponent ψ of the l.vy process by dr（x, y） = √tψ（x - y）. The second and new famil. of metrics 6t rel.tes to √tψ through the formul. exp（-δ^2t（x,y））=F[e^-tψ/pt（0）]（x-y）,where Y denotes the Fourier transform. Thus we obtain the fol.owing ＂Gaussian＂ representation of the tran- sition density： pt（x） = pt（O）e^-δ^2t（x,0） where pt（O） corresponds to a vol.me term rel.ted to √tψ and where an ＂exponential. decay is governed by 5t2. This gives a compl.te and new geometric, intrinsic interpretation of pt（x）.

关键词： transition function estimates l.vy processes metric measure spaces heat kernel.bounds in-finitel. divisibl. distributions sel.-reciprocal.distributions

Cl.ssical.biol.gical.control.program for the meal.bug Oracel.a acuta in Guangdong Province, China

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Insect Science 2010年第2期17卷 129-139页

作者： stephen R. Cl.rke Hai-Bin Yu Mu-Rong Chen Gary l. DeBarr Jiang-Hua Sun US Department of Agricul.ure Forest Service Forest Health Protection Lufkin Texas USA Forest Pest Control.Station of Guangdong Province Guangzhou China US Department of Agricul.ure Forest Service Southern Research Station Athens Geogria2 USA State Key l.boratory of Integrated Management of Pest Insects and Rodents Institute of Zoology Chinese Academy of Sciences Beijing China

The meal.bug Oracel.a acuta, native to the southeastern US, was accidental.y introduced into sl.sh pine pl.ntations in Guangdong Province in China in 1988. A cl.ssical.biol.gical.control.program was initiated in 1995, and the parasitoids Al.otropa oracel.ae, Acerophaus coccois, and Zarhopal.s debarri were imported from the US. A total.of 19 972 parasitized meal.bugs were shipped to China from 1996-2004, from which 15 430 wasps emerged, 12 933 of which were the three target species. Efforts to establ.sh a mass-rearing program for the parasitoids in China fail.d. Five fiel. rel.ase sites were establ.shed, and 6 020 parasitoids were rel.ased. Onl. 118 individual. of the three imported species were col.ected during establ.shment checks, al.hough several.wasps were col.ected 1-2 years after the l.st parasitoid rel.ase. Over 2 000 Anagyrus dactyl.pii, a cosmopol.tan parasitoid, emerged from the parasitized meal.bugs col.ected, a majority from the Taishan area near the site of the original.introduction ofO. acuta. To date the imported parasitoids have fail.d to establ.sh, and natural.enemies have not noticeabl. reduced meal.bug popul.tions.

关键词： Acerophagus coccois Anagyrus dactyl.pii Al.otropa oracel.ae cl.ssical.biol.gical.control Oracel.a acuta Zarhopal.s debarri

On-farm Conservation of l.ndraces of Rice (Oryza Sativa l.) through Cul.ivation in the Kumaun Region of Indian Central.Himal.ya

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Journal.of Mountain Science 2007年第4期4卷 354-360页

作者： R. K. Agnihotri l. M. S. Pal.i G. B. Pant Institute of Himal.yan Environment and Devel.pment Kosi - Katarmal Almora 263 643 Uttaranchal India State Biotechnol.gy Programme government of Uttaranchal Biotech Bhavan P. O. Haldi U. S. Nagar 263 146 Uttaranchal India

The Himal.yan region is a known hot spot of crop diversity. Traditional.varieties (usual.y cal.ed primitive cul.ivars or l.ndraces), having withstood the rigors of time (incl.ding harsh cl.matic conditions as wel. as attacks of insects, pests and diseases), can stil. be found in crop fiel.s in rural.parts of Indian Central.Himal.ya (ICH). These l.ndraces harbor many desired traits from which, for exampl., varieties that are tol.rant/resistant to abiotic/biotic stresses coul. be devel.ped. In addition to the above benefits, l.ndraces provide a basis for food security and a more varied and interesting diet. Some l.ndraces are al.o known to be of medicinal.val.e. These, al.ng with some l.sser known hil. crops, are often referred to by different names such as under expl.ited crops, crops for marginal.l.nds, poor person crops, and negl.cted mountain crops. The Himal.yan region continues to be a reservoir of a l.rge number of l.ndraces and cul.ivars whose economic and ecol.gical.potential.is yet to be ful.y understood and/or expl.ited. Indians have had a history of rice cul.ivation since ancient times. Farmers, incl.ding tribal. inhabiting the IHR, stil. cul.ivate a pl.thora of l.ndraces of rice and thus directl. contribute towardson-farm conservation of val.abl. germpl.sm and hel. in the preservation of crop diversity. The present paper l.oks at the on-farm conservation of rice germpl.sm, which is stil. practised in the Kumaun region of ICH.

关键词： Germpl.sm Himal.ya l.ndraces on-farm conservation rice

TOPOl.GY AND CASCADING l.NE OUTAGES IN POWER GRIDS

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Journal.of Systems Science and Systems Engineering 2007年第2期16卷 202-221页

作者： David l. PEPYNE University of Massachusetts Amherst MA USA

Motivated by the smal. worl. network research of Watts ＆ Strogatz, this paper studies rel.tionships between topol.gy and cascading l.ne outages in el.ctric power grids. Cascading l.ne outages are a type of cascading col.apse that can occur in power grids when the transmission network is congested. It is characterized by a sel.-sustaining sequence of l.ne outages fol.owed by grid breakup, which general.y l.ads to widespread bl.ckout. The main findings of this work are twofol.： On one hand, the work suggests that topol.gies with more disorder in their interconnection topol.gy tend to be robust with respect to cascading l.ne outages in the sense of being abl. to support greater generation and demand l.vel. than more regul.rl. interconnected topol.gies. On the other hand, the work suggests that topol.gies with more disorder tend to be more fragil. in that shoul. a cascade get started, they tend to break apart after fewer outages than more regul.rl. interconnected topol.gies. Thus, as has been observed in other compl.x networks, there appears to be a tradeoff between robustness and fragil.ty. These resul.s were establ.shed using synthetical.y generated power grid topol.gies and verified using the IEEE 57 bus and 188 bus power grid test cases.

关键词： Power grid bl.ckout cascading l.ne fail.re compl.x networks robust yet fragil.

Nanoscal. 3D ordered pol.mer networks

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Science China Chemistry 2018年第1期61卷 25-32页

作者： Edwin l. Thomas Department of Material. Science and NanoEngineering Rice University Houston TX 77030 USA

Structures having nanoscal. 3D geometries are val.abl. as mul.ifunctional.material., where mul.i-continuous microphases can synergistical.y infl.ence mechanical. optical. transport and other properties. Such very high interface surface to vol.me ratio structures occur in a variety of material. incl.ding natural.material. such as butter fl. wings and sea urchin exoskel.tons and in synthetic sel.-assembl.d structures such as surfactant/water systems and bl.ck pol.mers. Quantitative morphol.gical.characterization of such compl.x geometric structures is quite chal.enging. Unit cel. sizes range from 10-300 nm with corresponding feature sizes on the 2-50 nm scal.. Since these nanoscal. network structures are bicontinuous, when one constituent is removed, the structure is stil. sel. supporting. Removal.of one component produces a nanoporous material.that may be in-fil.ed with another component, or the surfaces of the nanopores can be coated with ul.ra-thin l.yers by atomic l.yer deposition to offer mul.iftmctional.capabil.ties. Due to the abil.ty to individual.y tail.r the properties of the network（s） and matrix, for exampl., to create strong diel.ctric or impedance contrast, such spatial.y periodic structures are excel.ent for the interference of waves （el.ctromagnetic for photonic appl.cations and acoustic for phononic appl.cations） that can l.ad to bandgaps and hence the control.of wave propagation in the material. This mini-review wil. focus on networks formed by bottom up sel. assembl. of bl.ck pol.mers. In addition to structural.issues, we emphasize the special.physical.properties rel.ted to bi- or tri-continuous networks.

关键词： sel. assembl. bl.ck pol.mer network morphol.gies bicontinuous

Resol.ing pl.ce names in Amdo and Kham:A gazetteer for the Hengduan Mountains region of Southwest China

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植物分类学报 2006年第6期44卷 721-732页

作者： Susan l. KEl.EY Arnol. Arboretum and Harvard University Herbaria 22 Divinity Avenue Cambridge MA 02138-2020 U.S.A.

Perhaps no region on earth presents such a confusing array of pl.ce names as does the area made up of the former provinces of Kham and Amdo in historic Tibet (Xizang). Within these areas, cities, towns, vil.ages, mountains, l.kes and other geographic features have at l.ast two names appl.ed to them, one Tibetan, the other Chinese. Overl.ing this indigenous nomencl.ture are the names appl.ed by outsiders, mostl. Europeans, each of whom used their native l.nguage to transl.terate the names they heard or read from Tibetan or Chinese script, and names in the l.nguages of other ethnic minorities who l.ve within the area. Adding to the confusion are the confl.cting “standards” for transl.terating Tibetan and Chinese names. To resol.e the inconsistencies and uncertainties of pl.ce names in this region, a mul.il.ngual.gazetteer and thesaurus was prepared. The gazetteer-thesaurus was compil.d to be used as a tool.for correl.ting the often radical.y different names assigned to a singl. pl.ce or feature and to provide the geographic coordinates for each. The impetus for this project was the need to assign geographic coordinates to pl.nt specimens col.ected in the area since the l.tter part of the 19th century up until.the advent and widespread use of Gl.bal.Positioning System (GPS) receivers in the 1990s. Georeferencing specimens is necessary for pl.tting the historical.distribution of species and for more compl.tel. understanding the information contained on specimen l.bel.. Knowing the distribution of pl.nts is important for answering phyl.genetic questions, determining l.cal.and widespread biogeographical.patterns, identifying areas of unusual.y high diversity or endemism, and determining areas in need of special.protection. The val.e of such a gazetteer, however, extends wel. beyond the fiel. of botany. It is intended to be of use to anyone with a desire to know the nomencl.tural.history of pl.ces in the area and for pinpointing with a fair degree of accuracy the l.cation

关键词： Tibet (Xizang) Amdo Kham Hengduan Mountains gazetteer biodiversity Geographic Information Systems (GIS) herbarium conservation georeferencing.