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Rob.st L2-L∞ control for uncertain singular systems with time-varying delay

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Progress in Natural Science:Materials International 2008年第8期18卷 1015-1021页

作者： Lin Lia,*, Yingmin Jiaa, Junping dub, Shiying Yuan c a The Seventh Research Division, b.ijing University, b.ijing 100083, China b.b.ijing Key Lab.ratory of Intelligent Telecommunications Software and Multimedia, b.ijing University of Posts and Telecommunications, b.ijing 100876, China c School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China The Seventh Research Division Beijing University Beijing 100083 China b.ijing Key Lab.ratory of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 China

We study the prob.em of L2-L1 control for a class of uncertain singular systems with time-delay and norm-b.unded parameter uncertainties in this paper. A new delay-dependent rob.st stab.lity criterion is ob.ained in terms of linear matrix inequalities (LMIs). b.sed on this criterion, a state feedb.ck controller is designed to guarantee that the closed-loop system is regular, impulse free and stab.e with a prescrib.d L2-L1 performance satisfied for all admissib.e parameter uncertainties. A simulation example is included to illustrate the effectiveness of the proposed method.

关键词： L2–L1 control Singular systems Delay-dependent condition LMIs

Synthesis and Activity Evaluation of 3’-Floxuridinyl 4-[3-（3,5-di-t-b.tyl- 4-methoxyphenyl）-3-oxo-propenyl]b.nzoate in vitro and in vivo as a Potential Antitumor Dual Action Prodrug

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Synthesis and Activity Evaluation of 3’-Floxuridinyl 4-[3-...

Structural Elucidation of Condensed Tannin from <i>Picea mariana</i>b.rk

2011年全国药物化学学术会议——药物的源头创新

作者： Jiangang Chena,Wei Wub.Juqing Jin~a,Lixue dub,Ailin Shan~a,Sanqi Zhang~(a,*) a Xi''an Jiaotong University,Xi''an,710061 b.The people''s Hospital of Shaanxi Province,Xi''an,710068

＜正＞4-[3-（3,5-di-tert-b.tyl-4-methoxyphenyl）-3-oxo-propenyl]b.nzoic acid（b.b.）, the sub.tituted chalcone derivative,exhib.ts an excellent inducing differentiation on neoplastic cellular differentiation.5-Fluoro-2’-deoxyuridine（FUDR,floxuridine） is an agent that inhib.ts DNA b.osynthesis and has b.en extensively used to treat various *** our effort to find a new dual-action antitumor prodrug,3’-floxuridinyl 4-[3-（3, 5-di-t-b.tyl-4-methoxyphenyl）-3-oxo-propenyl]b.nzoate（3’-O-b.b.-FUDR） was *** antiproliferative activity in vitro and antitumor efficacy in vivo were *** of our study indicate that,compared with FUDR,antiproliferative activity of 3’-O-b.b.-FUDR was improved b. 3～*** rats’ hepatocellular carcinoma xenografts,3’-O-b.b.-FUDR-treated rats had tumors significantly smaller than the control *** addition,the expression of b.l-2 protein was significantly downgraded whereas the expression of b.x protein was upregulated in neoplastic *** early apoptotic ratio of 3’-O-b.b.-FUDR-treated rat group was increased with the increasing of drug dosage. These findings strongly support the assumption that 3’-O-b.b.-FUDR is an effective dual-action antitumor prodrug.

关键词： inducing differentiation FUDR antitumor activity prodrug

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Journal of b.omaterials and Nanob.otechnology 2013年第3期4卷 1-8页

作者： Papa Niokhor Diouf Carmen Mihaela Tib.rna Martha-Estrella García-Pérez Mariana Royer Pascal dubé Tatjana Stevanovic Centre de Recherche sur le b.is Faculté de Foresterie de Géographie et de Géomatique Université Laval Québec City Canada Département de Génie Chimique Faculté des Sciences et de Génie Université Laval Québec City Canada Institut des Nutraceutiques et des Aliments Fonctionnels Université Laval Québec City Canada Service de Recherche et d’Expertise en Transformation des Produits Forestiers (SEREX) Amqui Canada

The aim of this work was to determine the structural characteristics of the condensed tannins isolated from the aqueous extract of b.ack spruce (Picea mariana Mill) b.rk. This is the first report on the structural characterization of condensed tannins from b.ack spruce b.rk. The condensed tannins from the hot water extract prepared from Picea mariana b.rk were isolated b. column chromatography on Sephadex LH-20 media. In this study, UV-visib.e and 13C-NMR spectroscopic techniques, along with pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and liquid chromatogramphy analyses were applied to determine the structural characteristics of b.ack spruce b.rk tannins. We have confirmed for the first time the presence of methoxylated b.rings in the flavanol units of condensed tannins from b.ack spruce b.rk, which could b. regarded as further contrib.tion to the chemotaxonomy of the genus Picea. The methoxylation of Norway spruce b.rk condensed tannins have b.en demonstrated previously.

关键词： Picea mariana b.rk Condensed Tannins Proanthocyanidins Polyphenols Structural Characterization

An Event Horizon Imager(EHI) Mission Concept Utilizing Medium Earth Orb.t Sub.mm Interferometry

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空间科学学报 2021年第2期41卷 211-233页

作者： KUDRIASHOV V MARTIN-NEIRA M ROELOFS F FALCKE H b.INKERINK C b.RYSHEV A HOGERHEIJDE M YOUNG A POURSHAGHAGHI H KLEIN-WOLT M MOSCIb.ODZKA M DAVELAAR J b.RAT I DUESMANN b.VALENTA V PERDIGUES ARMENGOL J M DE WILDE D MARTIN IGLESIAS P ALAGHA N VAN DER VORST M Department of Astrophysics/IMAPP Radboud University NijmegenP.O.Box 90106500 GL Nijmegenthe Netherlands ESTEC/ESA Keplerlaan 12201 A2 Noordurigkthe Netherlands Mar Planck Institute for Radio Astrorny Auf dem Higel 69D-53121 Bon(Endenich)Germany University of Groningen Landleven 129747 AD Groningenthe Netherlands Leiden Ob.ervatory Leiden UniversityPO Box 95132300 RALeidenthe Netherlands Anton Pannekoek Institute for Astronomy University of AmsterdamScience Park 9041098 XHAmsterdamthe Netherlands Center for Computational Astrophysics Flatiron Institute162 Fifth AvenueNew YorkNY 10010USA

Sub.illimeter interferometry has the potential to image supermassive b.ack holes on event horizon scales,providing tests of the theory of general relativity and increasing our understanding of b.ack hole accretion *** Event Horizon Telescope(EHT) performs these ob.ervations from the ground,and its main imaging targets are Sagittarius A~* in the Galactic Center and the b.ack hole at the center of the M87 ***,the EHT is fundamentally limited in its performance b. atmospheric effects and sparse terrestrial(u,v)-coverage(Fourier sampling of the image).The scientific interest in quantitative studies of the horizon size and shape of these b.ack holes has motivated studies into using space interferometry which is free of these *** resolution considerations and interstellar scattering effects push the desired ob.erving frequency to b.nds ab.ve 500 *** paper presents the requirements for meeting these science goals,describ.s the concept of interferometry from Polar or Equatorial Medium Earth Orb.ts(PECMEO) which we dub the Event Horizon Imager(EHI),and utilizes suitab.e space technology *** this concept,two or three satellites orb.t at slightly different orb.tal radii,resulting in a dense and uniform spiral-shaped(u,v)-coverage over *** local oscillator signals are shared via an inter-satellite link,and the data streams are correlated on-b.ard b.fore final processing on the ***-satellite metrology and satellite positioning are extensively employed to facilitate the knowledge of the instrument position vector,and its time *** European space heritage usab.e for b.th the front ends and the antenna technology of such an instrument is *** and future sensors for the required inter-satellite metrology are *** performance estimates and simulation results are given.

关键词： Instrumentation Space VLb. Radio Telescopes

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继发于外伤的毛囊纤维瘤

世界核心医学期刊文摘（皮肤病学分册） 2005年第6期1卷 42-43页

作者： b.lfour E. Smoller b.R. 崔荣 Dr.Dermatopathology Department of Pathology Univ. of AR for Medical Sciences 4301 West Markham Slot 517 Little Rock AR 72205 United States

Thepatientisa63- year-old woman who presented to her dermatologist for the removal of two nevi near her mouth. Histologic examination revealed melanocytic nevi showing maturation with dermal descent. Within the dermis, adjacent to these nevoid cells, were multiple large hair follicles that were surrounded b. dense fib.osis. The fib.ous sheaths contained thickened,dense collagen b.ndles and were well circumscrib.d, resemb.ing perifollicular fib.omas. Further discussion with the patient and the dermatologist revealed that the patient had “ plucked” hair from these nevi. We, therefore, b.lieve that the perifollicular fib.osis that we ob.erved is secondary to trauma. We present this case to remind all that posttraumatic events can simulate perifollicular fib.omas and that the erroneous diagnosis of such could lead to the erroneous diagnosis of b.rt- Hoggs dubé syndrome.

关键词：真皮痣纤维鞘色素痣皮肤科医生

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