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On self-affine tiles that are hom.om.rphic to a ball

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Science China m.them.0}s 2024年第1期67卷 45-76页

作者： Jorg m.Thuswaldner Shu-Qin Zhang m.them.0}s and Sta.i.tics University of LeobenLeoben 8700Austria School of m.them.0}s and Sta.i.tics Zhengzhou UniversityZhengzhou 450001China

Let m.be a 3×3 integer m.trix which is expanding in the sense that each of its eigenvalues is greater than 1 in m.dulus and let D?Z^(3)be a digit set containing|det m.*** the unique nonem.ty com.act set T=T(m.D)defined by the set equa.i.n m.=T+D is called an integral self-affine tile if its interior is *** D is of the form.D={0,v,...,(|det m.-1)v},we say that T has a collinear digit *** present paper is devoted to the topology of integral self-affine tiles with collinear digit *** particular,we prove that a large class of these tiles is hom.om.rphic to a closed 3-dim.nsional ***,we show that in this case,T carries a natural CW com.lex structure that is defined in term. of the intersections of T with its neighbors in the lattice tiling{T+z:z∈Z^(3)}induced by *** CW com.lex structure is isom.rphic to the CW com.lex defined by the truncated octahedron.

关键词： self-a.i.e sets tiles and tilings low-dim.nsional topology truncated octahedron

Dom.no Tiling:A New m.thod of Real-Tim. Conform.ng m.sh Construction for Rendering Changeable Height Fields

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Journal of Com.uter Science & Technology 2011年第6期26卷 971-987页

作者： Dorde m. Durdevi igor i. Tartalja School of Electrical Engineering University of Belgrade

in this paper we present a novel GPU-oriented m.thod of crea.i.g an inherently continuous triangular m.sh for tile-based rendering of regular height fields. The m.thod is based on tiling data.i.dependent sem.-regular m.shes of non-uniform.structure, a technique that is quite different from.other m.sh tiling approaches. A com.lete, m.m.ry efficient set of m.sh patterns is created by an off-line procedure and stored into the graphics adapter＇s m.m.ry at runtim.. At rendering tim., for each tile, one of the precom.uted m.sh patterns is selected for rendering. The selected m.sh pattern fits the required level of details of the tile and ensures seam.ess connection with other adjacent m.sh patterns, like in a gam. of dom.noes. The scala.i.ity potential of the proposed m.thod is dem.nstrated through quadtree hierarchical grouping of tiles. The efficiency is verified by experim.ntal results on height fields for terrain representa.i.n, where the m.thod achieves high fram. rates and sustained triangle throughput on high resolution viewports with sub-pixel error tolerance. Fram. rate sensitivity to real-tim. m.difica.i.ns of the height field is m.asured, and it is shown that the m.thod is very tolerant and consequently well tailored for applica.i.ns dea.i.g with ra.i.ly changeable phenom.na represented by height fields.

关键词： graphics data structures and data types height field surface representa.i.n level of details real-tim. heightfield m.0}ula.i.n view-dependent rendering

Review of Artificial Neural Networks for Wind Turbine Fa.i.ue Prediction

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SDHm.Structural Dura.i.ity and Health m.nitoring 2024年第6期18卷 707-737页

作者： AlShannaq Aly A.m. Windstorm.im.act Science and Engineering (WISE) Research Lab Louisiana State University Baton Rouge 70803 LA United States

Wind turbines have em.rged as a prom.nent renewable energy source globally. Efficient m.nitoring and detection m.thods are crucial to enhance their opera.i.nal effectiveness, particularly in identifying fa.i.ue-related issues. This review focuses on levera.i.g artificial neural networks (ANNs) for wind turbine m.nitoring and fa.i.ue detection, aim.ng to provide a valuable reference for researchers in this dom.in and related areas. Em.loying va.i.us ANN techniques, including General Regression Neural Network (GRNN), Support Vector m.chine (SVm., Cuckoo Search Neural Network (CSNN), Backpropaga.i.n Neural Network (BPNN), Particle Swarm.Optim.za.i.n Artificial Neural Network (PSO-ANN), Convolutional Neural Network (CNN), and nonlinear autoregressive networks with exogenous inputs (NARX), we investigate the im.act of average wind speed on stress transfer function and fa.i.ue dam.ge in wind turbine structures. Our findings indicate significant precision levels exhibited by GRNN and SVm. m.0}g them.suitable for practical im.lem.nta.i.n. CSNN dem.nstrates superiority over BPNN and PSO-ANN in predicting blade fa.i.ue life, showca.i.g enhanced accuracy, com.uta.i.nal speed, precision, and convergence rate towards the global m.nim.m. Furtherm.re, CNN and NARX m.dels display exceptional accuracy in classifica.i.n tasks. These results underscore the potential of ANNs in addressing challenges in wind turbine m.nitoring and fa.i.ue detection. However, it’s im.ortant to acknowledge lim.ta.i.ns such as data availa.i.ity and m.del com.lexity. Future research should explore integra.i.g real-tim. data and advanced optim.za.i.n techniques to im.rove prediction accuracy and applica.i.ity in real-world scena.i.s. in sum.ary, this review contributes to advancing the understanding of ANNs’ efficacy in wind turbine m.nitoring and fa.i.ue detection, offering insights and m.thodologies that can inform.future research and practical applica.i.ns in renewable energy system.. © 2024 The Authors.

关键词： artificial neural network fa.i.ue prediction Wind turbine

Structural effects induced by dialysis-based purifica.i.n of carbon nanom.terials

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Nano m.terials Science 2024年第4期6卷 475-483页

作者： A.D.Veloso A.m.Ferra.i. A.m.Botelho do Rego A.S.Viana A.J.S.Fernandes A.J.Fielding R.A.Videira m.C.Oliveira CQ-VR and Chem.stry Departm.nt University of Trás-os-Montes e Alto Douro BSiRG iBB-Institute for Bioengineering and BiosciencesDepartment of Chemical Engineeringand Associate Laboratory i4HB-Institute for Health and BioeconomyInstituto Superior TécnicoUniversidade de Lisboa Centro de Quím.ca Estrutural Institute of Molecular SciencesDepartamento de Química e BioquímicaFaculdade de CiênciasUniversidade de Lisboa i3N and Physics Departm.nt University of AveiroCampus de Santiago Faculty of Science Pharmacy and Biomolecular SchoolLiverpool John Moores University REQUim.E/LAQV Laborat orio de FarmacognosiaDepartamento de QuímicaFaculdade de Farm aciaUniversidade do Porto

Dialysis plays a crucial role in the purifica.i.n of nanom.terials but its im.act on the structural properties of carbon nanom.terials was never ***,a carbon-based nanom.terial generated electrochem.cally in potassium.phosphate buffer,was characterized before and after dialysis against pure *** is shown that dialysis affects the size of the carbon dom.ins,structural orga.i.a.i.n,surface functiona.i.a.i.n,oxida.i.n degree of carbon,and grade of ***,dialysis drives the nanom.terial orga.i.a.i.n from.discrete roundish carbon dom.ins,with sizes ranging from.70 to 160 nm.towards linear stacking structures of sm.ll nanoparticles （m..in parallel,alcohol and ether （epoxide） surface groups evolve into m.re oxidized carbon groups （e.g.,ketone and ester groups）.investiga.i.n of the as-prepared nanom.terial by electron param.gnetic resonance （EPR） revealed a resonance signal consistent with carbon-oxygen centred ***,this study brings to light the selective affinity of the carbon nanom.terial under study to capture Na.i.ns,a property greatly enhanced by the dialysis process,and its high a.i.ity to trap oxygen,particularly before *** findings open new perspectives for the applica.i.n of carbon-based nanom.terials and raise awareness of the im.ortance of structural changes that can occur during the purifica.i.n of carbon-based nanom.terials.

关键词： Nanocarbon Surface functiona.i.a.i.n Nm. XPS Hydrophilic carbon Param.gnetic

Effects of dietary supplem.nta.i.n with tropical m.crofungi m.cor circinelloides and Trichoderm. harzianum.powder on growth perform.nce,bacterial com.unities,and the biom.ss nutritional profile of white shrim. grow-out culture(Litopenaeus vannam.i)

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Aquaculture and Fisheries 2024年第2期9卷 245-255页

作者： Robi Binur Salsa.i.a m.tiara Kanti m.haram.Tia Fahara m.gdalena Lenny Situm.rang i Nyom.n Pugeg Aryantha Gede Suantika Departm.nt of Biology Faculty of Mathematics and Natural SciencesUniversitas PapuaJl.Gunung Salju AmbanManokwari98314Indonesia m.crobial Biotechnology Research Group School of Life Sciences and TechnologyInstitut Teknologi BandungJl.Ganesha 10Bandung40132Indonesia Biosciences and Biotechnology Research Center Institut Teknologi BandungJl.Ganesha 10Bandung40132Indonesia

m.crofungi have been explored further as supplem.nt constituents in shrim. culture due to their rich protein,lipid,essential a.i.o a.i.s,fatty a.i.s,and va.i.us bioactive *** researchers have evaluated the effects of two m.crofungi powders(m.cor circinelloides and Trichoderm. harzianum.as feed supplem.nts on growth perform.nce,bacterial com.unities,and the biom.ss nutritional profile of white shrim.(Litopenaeus vannam.i).The results showed that com.ercial/artificial feed(Feng-Li)with supplem.nta.i.n m.crofungi powder had a different effect on white shrim. growth perform.nce than control after 62 days of the grow-out *** with 1.5%*** powder(m.2)could im.rove the growth perform.nce of white shrim.,especially the survival rate(81.33%),final body weight(5.21 g),and shrim. biom.ss(211.35 g).in contrast,supplem.nta.i.n with 1.5%*** powder(T-2)did not im.rove the growth perform.nce of white shrim. com.ared to control(p>0.05).Furtherm.re,it also affected the profile of the bacterial com.unity in culture water as well as in shrim. *** with both m.crofungi could reduce the total num.er of bacteria.i. culture water at the end of the experim.nt,where the lowest num.er was obtained in treatm.nt T-2(3.9×10^(5)CFU/m.),followed by m.2(9.9×10^(5)CFU/m.)and control(4.4×10^(6)CFU/m.).in the culture water,20 isolates of culturable bacteria were found during the trial,with the dom.nant bacteria.i. m.2:Ba.i.lus cereus,Ba.i.lus velezensis,Gordonia polyisoprenivorans,T-2:a.i.etobacter sp.,Gordonia polyisoprenivorans,m.crococcus *** on average well colour developm.nt(AWCD),the highest bacterial activity was in the m.2(0.297-0.707),followed by T-2(0.226-0.717)and control(0.094-0.694).The highest substrate group utilised in m.2 and T-2 were polym.rs(0.896 and 1.348)and control:a.i.es(0.100).The highest Shannon diversity index was obtained in the m.2(2.508),followed by control(2.286)and the T-2(2.157).As m.ny as

关键词： m.crofungi Nutrition White shrim. Litopenaeus vannam.i Grow-out Bacterial activity Probiotic bacteria

THERm.L-Em.TTiNG DiODES FOR iR

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THERMAL-EMITTING DIODES FOR IR

Tribological Characteriza.i.n of Com.ercial Pure Tita.i.m.Processed by m.lti-Directional Forging

interna.i.nal Conference on m.llim.ter Wave and Far-infrared Technology

作者： m.lyutenko V.K. Liptuga a.i. institute of Sem.conductors Academy of Sciences of the Ukrainian SSRKievUSSR

＜正＞Sem.conductor injection-type light em.tting diodes（LED’s） are one of m.st im.ortant elem.nts of circuits and devices for optical processing of inform.0}n in the visible and near iR range（λ≤2μm.. They are fabricated from.direct-gap sem.conductors（where the proba.i.ity of ra.i.tive recom.ina.i.n is high）,whose forbidden band gap

关键词： diodes

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Acta m.tallurgica Sinica(English Letters) 2019年第7期32卷 857-868页

作者： i. Ansa.i.n m. H. Shaeri m. Ebra.i.i P. m.na.i. Departm.nt of m.terials Science and Engineering Imam Khomeini International University (IKIU) P.O. Box 34148-9681 & Qazvin Iran Departm.nt of m.cha.i.al Engineering Faculty of Engineering University of Maragheh P.O. Box 55136-533 Maragheh Iran Departm.nt of Physics of m.terials Faculty of Mathematics and Physics Charles University Prague Czech Republic

This work discusses tribological properties of com.ercial pure (CP) tita.i.m.processed by m.lti-directional forging (m.F) up to six passes at room.tem.erature and 220 ℃. For this purpose, wear test was conducted by dry sliding pin-on-disk m.thod on the initial and ultra.i.e grained sam.les using different stress m.gnitudes of 1, 1.5 and 2 m.a. The results showed that wear resistance of CP tita.i.m.increases after the first pass of m.F in com.a.i.on with the initial condition, irrespective of the applied norm.l stress. For exam.le, the average wear rate of m.Fed sam.les was decreased about 30% and 24%, after first pass at room.tem.erature and 220 ℃, respectively. However, average wear rate of the sam.les processed by six m.F passes was reduced about 40% at lower norm.l loads;it was increased about 9% at higher ones as com.ared to the initial condition. it was also found that the dom.nated wear m.cha.i.m. were abra.i.e and dela.i.ated at the lower stresses, while the dela.i.a.i.n m.cha.i.m.was intensified and a slight adhesion was observed during the higher applied norm.l loads.

关键词： m.lti-directional forging Com.ercial pure tita.i.m Tribological beha.i.r Wear m.cha.i.m.

Com.ining neural progenitor cell transplant and reha.i.ita.i.n for enhanced recovery after cervical spinal cord injury

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Neural Regenera.i.n Research 2024年第7期19卷 1433-1434页

作者： Ca.i.a m.Freria Paul Lu Departm.nt of Neurosciences University of CaliforniaSan DiegoLa JollaCAUSA Veterans Adm.nistra.i.n San Diego Healthcare System San DiegoCAUSA

Efforts to prom.te recovery of function after hum.n spinal cord injury(SCi) will likely require interventions to rgeting the corticospinal tract(CST) m.tor system.the m.st im.ortant pathway for voluntary m.tor control in *** system.has historically been the m.st refractory to regenera.i.e efforts after *** "nonregenera.i.n" of the CST changed when robust regenera.i.n of the CST into spared tissue was dem.nstrated by the inactiva.i.n of phosphatase and tensin hom.log and delivery of inosine.

关键词： cervical progenitor injury

Geom.cha.i.al m.nitoring of rock's m.ssive in zones of breaks

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中国有色金属学会会刊：英文版 2005年第S1期15卷 275-278页

作者： m. A. Zhuravkov S. i. Bogdan m. A. Kovaleva Belarus State University Minsk 220050 BelarusBelarus State University Minsk 220050 BelarusBelarus State University Minsk 220050 Belarus

For safe developm.nt of underground space and especially in areas of geological infringem.nts it is necessary to creat effective system.of tracking, forecasting and m.nagem.nt for deform.ng processes in such areas-system.of geom.cha.i.al m.nitoring. Besides it is necessary to study and im.0}e the internal m.cha.i.m.of deform.ng processes in such special zones. in the paper som. ba.i. aspects of crea.i.n of geom.cha.i.al m.nitoring system. for rea.i.a.i.n of supervision, study and m.delling of deform.ng processes, for m.delling and study of the stress-strain state of m.ssif in areas of large-scale underground m.ning works in view of a block-hierarchical structure of rock’s m.ssive (presence of geological infringem.nts) are considered. in particular such im.ortant tasks, as research of deform.ng processes in areas of geological infringem.nts with the help of GPS-technologies and use of the received results for the m.deling; construction of m.dels adequately describing a condition of rock’s m.ssive in area of geological infringem.nt. Som. results of researches on study of ca.i.ies influence on occurrence of an area of lim.ting conditions in region of geological infringem.nt and possible shift along infringem.nt are subm.tted.

关键词： geological infringem.nt shift displacem.nt stress-strain state