检索结果-南通市图书馆

Petroleum s.ience 2024年第2期21卷 1415-1428页

作者： Miao wang Chao Feng s.hool of Bus.nes. Zhengzhou UniversityZhengzhou450001HenanChina s.hool of Economics.and Bus.nes. Adminis.ration Chongqing UniversityChongqing400030China

This.paper attempts.to explore the decoupling relations.ip and its.drivers.between indus.rial economic increas. and energy-related CO_(2) emis.ions.ICE). Firs.ly, the decoupling relations.ip was.evaluated by Tapio index. Then, bas.d on the DEA meta-frontier theory framework which taking into account the regional and indus.rial heterogeneity and index decompos.tion method, the driving factors.of decoupling proces. were explored mainly from the view of technology and efficiency. The res.lts.s.ow that during2000-2019, weak decoupling was.the primary s.ate. Inves.ment s.ale expans.on was.the larges. reas.n hindering decoupling proces. of indus.rial increas. from ICE. Both energy s.ving and production technology achieved s.gnificant progres., which facilitated the decoupling proces.. s.multaneous.y, the energy technology gap and production technology gap among regions.have been narrowed, and played a role in promoting decoupling proces.. On the contrary, both s.ale economy efficiency and pure technical efficiency have inhibiting effects.on decoupling proces.. The former indicates.that the s.ale economy of China's.indus.ry was.not conducive to improve energy efficiency and production efficiency, while the latter indicates.that res.urce mis.llocation problem may exis. in both energy market and product market.

关键词： China's.indus.rial s.ctor Decoupling proces. Meta-frontier DEA Index decompos.tion method Driving factors

Image Fus.on Bas.d on Bioins.ired Rattles.ake Vis.al Mechanis. Under Lighting Environments.of Day and Night Two Levels

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2024年第3期21卷 1496-1510页

作者： Yong wang Hongmin z.u College of Communication Engineering Jilin UniversityChangchun130012China

This.s.udy,grounded in Waxman fus.on method,introduces.an algorithm for the fus.on of vis.ble and infrared images.tailored to a two-level lighting environment,ins.ired by the mathematical model of the vis.al receptive field of rattles.akes.and the two-mode cells.*** res.arch pres.nted here is.s.gmented into three *** the firs. s.gment,we des.gn a preproces.ing module to judge the ambient light intens.ty and divide the lighting environment into two levels.day and *** s.cond s.gment propos.s.two dis.inct network s.ructures.des.gned s.ecifically for thes. daytime and nighttime *** the daytime images.where vis.ble light information is.predominant,we feed the ON-VIs.s.gnal and the IR-enhanced vis.al s.gnal into the central excitation and s.rrounding s.ppres.ion regions.of the ON-center receptive field in the B channel,***,for nighttime images.where infrared information takes.precedence,the ON-IR s.gnal and the Vis.al-enhanced IR s.gnal are s.parately input into the central excitation and s.rrounding s.ppres.ion regions.of the ON-center receptive field in the B *** outcome is.a ps.udo-color fus.d *** third s.gment employs.five different no-reference image quality as.es.ment methods.to evaluate the quality of thirteen s.ts.of ps.udo-color images.produced by fus.ng infrared and vis.ble *** images.are then compared with thos. obtained by s.x other methods.cited in the relevant *** empirical res.lts.indicate that this.s.udy's.outcomes.s.rpas. the comparative res.lts.in terms.of average gradient and s.atial *** one or two s.ts.of fus.d images.underperformed in terms.of s.andard deviation and entropy when compared to the control *** s.ts.of fus.d images.did not perform as.well as.the comparis.n in the QAB/F *** conclus.on,the fus.d images.generated through the propos.d method s.ow s.perior performance in terms.of s.ene detail,vis.al perception,and image s.arpnes.

关键词： Rattles.ake Vis.ble image Infrared image Daylight Bionic

CFD-bas.d hull optimiz.tion in calm water us.ng adaptive grid deformation method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2024年第2期36卷 241-262页

作者： s.uguang wang Yonghwan Kim Department of Naval Architecture and Ocean Engineering Seoul National UniversitySeoulKorea

This.paper pres.nts.an adaptive grid deformation technique for optimiz.ng s.ip hull forms.us.ng computational fluid dynamics.CFD).The propos.d method enables.accurate and s.ooth updates.of the hull s.rface and 3-D CFD grids.in res.ons. to des.gn *** technique incorporates.a two-level point-trans.ormation approach to move the grid points.by a few des.gn ***,generic B-s.lines.are utiliz.d to trans.orm grid points.according to the dis.lacements.of the control points.within a defined control *** ens.res.s.rface modification accuracy and s.oothnes.,s.milar to thos. provided by non-uniform rational ***,radial bas.s.functions.are us.d to interpolate the movements.of the control points.with a limited s.t of des.gn *** developed method effectively maintains.the mes. quality and s.mulation *** applying this.method to s.rface and grid adaptation,a regres.ion model is.propos.d in the form of a s.cond-order polynomial to repres.nt the relations.ip between the geometric parameters.and des.gn *** polynomial is.then us.d to introduce geometric ***,a radial bas.s.function s.rrogate model for the calm-water res.s.ance is.cons.ructed to approximate the objective *** enhanced optimiz.tion framework is.propos.d for CFD–bas.d hull optimiz.tion and applied to KVLCC2 to validate its.feas.bility and efficiency.

关键词： Hull-form optimiz.tion adaptive grid deformation s.ip res.s.ance OpenFOAM radial bas.s.function(RBF)s.rrogate model

A generaliz.tion of Banach's.lemma and its.applications.to perturbations.of bounded linear operators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics.A Journal of Chines. Univers.ties. 2024年第2期39卷 363-369页

作者： wang z. DING Jiu wang Yu-wen s.hool of Mathematics.s.iences Harbin Normal UniversityHarbin 150025China s.hool of Mathematics.and Natural s.iences The University of Southern MississippiHattiesburg MS 39406-5043USA Academic Committee Harbin Institute of PetroleumHarbin 150027China

Let X be a Banach s.ace and let P:X→X be a bounded linear *** an algebraic inequality on the s.ectrum of P,we give a new s.fficient condition that guarantees.the exis.ence of(I-P)^(-1) as.a bounded linear operator on X,and a bound on its.s.ectral radius.is.als. *** generaliz.s.the clas.ic Banach *** apply the res.lt to the perturbation analys.s.of general bounded linear operators.on X with commutative perturbations.

关键词： Banach lemma s.ectral radius generaliz.d invers. perturbation analys.s

Effects.of s.rum proteins.on corros.on rates.and product bioabs.rbability of biodegradable metals

在线全文

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2024年第1期3卷 132-148页

作者： Hongjie z.ang Xin Li z.hua Qu Wanqian z.ang Quns.ng wang Dinglingge Cao Yaoben wang Xin wang Yang wang Lin Yu Jiandong Ding s.ate Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China

Corrodible metals.are the newes. kind of biodegradable materials.and rais. a new problem of the corros.on ***,the removal of the precipitated products.has.been unclear and even largely ignored in ***,we find that albumin,an abundant macromolecule in s.rum,enhances.the s.lubility of corros.on products.of iron in blood mimetic Hank’s.s.lution *** is.univers.l for other main biodegradable metals.s.ch as.magnes.um,z.nc and polyes.er-coated *** als. influences.corros.on rates.in divers. trends.in Hank’s.s.lution and normal *** on quantitative s.udy theoretically and experimentally,both the effects.on corros.on rates.and s.luble fractions.are interpreted by a unified mechanis.,and the key factor leading to different corros.on behaviors.in corros.on media is.the interference of albumin to the Ca/P pas.ivation layer on the metal *** work has.illus.rated that the interactions.between metals.and media macromolecules.s.ould be taken into cons.deration in the des.gn of the next-generation metal-bas.d biodegradable medical devices.in the formulis. of precis.on *** improved Hank’s.s.lution in the pres.nce of albumin and with a higher content of initial calcium s.lt is.s.gges.ed to acces. biodegradable metals.potentially for cardiovas.ular medical devices.where the content of calcium s.lt is.calculated after cons.deration of chelating of calcium ions.by albumin,res.lting in the phys.ological concentration of free calcium ions.

关键词： biodegradable metal macromolecule albumin corros.on bioabs.rbability iron polylactide magnes.um z.nc

Anis.tropic time-dependent behaviors.of s.ale under direct s.earing and as.ociated empirical creep models

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rock Mechanics.and Geotechnical Engineering 2024年第4期16卷 1262-1279页

作者： Yachen Xie Michael z.Hou Hejuan Liu Cunbao Li s.enz.en Key Laboratory of Deep Engineering s.iences.and Green Energy Shenzhen UniversityShenzhen518060China Ins.itute of s.bs.rface Energy s.s.ems Clausthal University of TechnologyClausthal-Zellerfeld38678Germany s.ate Key Laboratory of Geomechanics.and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

Unders.anding the anis.tropic creep behaviors.of s.ale under direct s.earing is.a challenging *** this.context,we conducted s.ear-creep and s.eady-creep tes.s.on s.ale with five bedding orientations.(i.e.0°,30°,45°,60°,and 90°),under multiple levels.of direct s.earing for the firs. *** res.lts.s.ow that the anis.tropic creep of s.ale exhibits.a s.gnificant s.res.-dependent *** a low s.ear s.res.,the creep compliance of s.ale increas.s.linearly with the logarithm of time at all bedding orientations.and the increas. depends.on the bedding orientation and creep *** high s.ear s.res. conditions.the creep compliance of s.ale is.minimal when the bedding orientation is.0°,and the s.eady-creep rate of s.ale increas.s.s.gnificantly with increas.ng bedding orientations.of 30°,45°,60°,and 90°.The s.res.-s.rain values.corres.onding to the inception of the accelerated creep s.age s.ow an increas.ng and then decreas.ng trend with the bedding orientation.A s.milogarithmic model that could reflect the s.res. dependence of the s.eady-creep rate while cons.dering the hardening and damage proces. is.*** model minimiz.s.the deviation of the calculated s.eady-s.ate creep rate from the obs.rved value and reveals.the behavior of the bedding orientation's.influence on the s.eady-creep *** applicability of the five clas.ical empirical creep models.is.quantitatively *** s.ows.that the logarithmic model can well explain the experimental creep s.rain and creep rate,and it can accurately predict long-term s.ear creep *** on an improved logarithmic model,the variations.in creep parameters.with s.ear s.res. and bedding orientations.are *** abovementioned findings.a mathematical method for cons.ructing an anis.tropic s.ear creep model of s.ale is.propos.d,which can characteriz. the nonlinear dependence of the anis.tropic s.ear creep behavior of s.ale on the bedding orientation.

关键词： Rock anis.tropy Direct s.ear creep Creep compliance s.eady-creep rate Empirical model Creep cons.itutive model

Dys.egulation of RNA modification s.s.ems.in clinical populations.with neurocognitive dis.rders

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Res.arch 2024年第6期19卷 1256-1261页

作者： Helen M.Knight Merve DemirbugenÖz.Adriana Perez.rovas.s.ltijeral Divis.on of Cells Organisms and Molecular GeneticsSchool of Life SciencesUniversity of NottinghamNottinghamUK Department of Pharmaceutical Toxicology Faculty of PharmacyAnkara UniversityAnkaraTurkey

The s.udy of modified RNA known as.epitrans.riptomics.has.become increas.ngly relevant in our unders.anding of dis.as.-modifying *** of N6 adenos.ne(m^(6)A)and C5 cytos.ne(m^(5)C)bas.s.occur on mRNAs.tRNA,mt-tRNA,and rRNA s.ecies.as.well as.non-coding *** emerging knowledge of RNA binding proteins.that act as.writer,reader,and eras.r effector proteins.comes.a new unders.anding of phys.ological proces.es.controlled by thes. *** proces.es.when s.atiotemporally dis.upted within cellular nanodomains.in highly s.ecializ.d tis.ues.s.ch as.the brain,give ris. to different forms.of *** this.review,we dis.us. accumulating evidence that changes.in the m^(6)A and m^(5)C methylation s.s.ems.contribute to neurocognitive *** s.udies.firs. identified mutations.within FMR1 to caus. intellectual dis.bility Fragile X s.ndromes.s.veral years.before FMR1 was.identified as.an m^(6)A RNA reader ***,familial mutations.within the m^(6)A writer gene METTL5,m^(5)C writer genes.Ns.N2,Ns.N3,Ns.N5,and Ns.N6,as.well as.THOC2 and THOC6 that form a protein complex with the m^(5)C reader protein ALYREF,were recogniz.d to caus. intellectual development ***,differences.in expres.ion of the m^(5)C writer and reader effector proteins.Ns.N6,Ns.N7,and ALYREF in brain tis.ue are indicated in individuals.with Alz.eimer's.dis.as.,individuals.with a high neuropathological load or have s.ffered traumatic brain ***,an abundance of m^(6)A reader and anti-reader proteins.are reported to change acros. brain regions.in Lewy bodies.dis.as.s.Alz.eimer's.dis.as.,and individuals.with high cognitive res.rve.m^(6)A-modified RNAs.are als. reported s.gnificantly more abundant in dementia with Lewy bodies.brain tis.ue but s.gnificantly reduced in Parkins.n's.dis.as. tis.ue,whils. modified RNAs.are mis.laced within dis.as.d cells.particularly where s.naps.s.are *** parahippocampal brain tis.ue,m^(6)A modification is.enri

关键词： 5-methylcytos.ne methylation Alz.eimer's.dis.as. cognitive dis.as.s epitrans.riptomics intellectual dis.bility Lewy body dis.as.s N6 adenos.ne RNA modification

Energy modeling and optimiz.tion of building condens.r water s.s.ems.with all-variable s.eed pumps.and tower fans.A cas. s.udy

在线全文

学校读者我要写书评

暂无评论

Building s.mulation 2024年第7期17卷 1085-1111页

作者： Yong Cao Chuang wang s.eng wang Xiao Fu Xinguo Ming s.hool of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China s.ate Key Laboratory of Air-Conditioning Equipment and s.s.em Energy Cons.rvation Zhuhai 519070China GREE Electric Appliances Inc.of ZhuhaiZhuhai 519070China s.hool of Environment and Energy Engineering Beijing University of Civil Engineering and ArchitectureBeijing 100044China Beijing Advanced Innovation Centerfor Future Urban Des.gn Beijing University of Civil Engineering and ArchitectureBeijing 100044China

The emergence of building condens.r water s.s.ems.with all-variable s.eed pumps.and tower fans.allows.for increas.d efficiency and flexibility of chiller plants.in partial load operation but als. increas.s.the control complexity of condens.r water *** s.udy aims.to develop an integrated modeling technique for evaluating and optimiz.ng the energy performance of s.ch a condens.r water *** propos.d s.s.em model is.bas.d on the s.mi-phys.cal s.mi-empirical chiller,pump,and cooling tower models.with capabilities.of fully cons.dering the hydraulic and thermal interactions.in the condens.r water loop,being s.lved analytically and much fas.er than iterative s.lvers.and s.pporting the explicit optimiz.tion of the pump and tower fan frequency.A mathematical approach,bas.d on the s.s.em model and cons.rained optimiz.tion technique,is.s.bs.quently es.ablis.ed to evaluate the energy performance of a typical dual s.tpoint-bas.d variable s.eed s.rategy and find its.energy-s.ving potential and mos. efficient operation by jointly optimiz.ng pumps.and tower *** all-variable s.eed chiller plant from Wuhan,China,is.us.d for a cas. s.udy to validate the s.s.em model’s.accuracy and explore its.*** res.lts.s.owed that the s.s.em model can accurately s.mulate the condens.r water s.s.em’s.performance under various.operating *** optimiz.ng the frequencies.of pumps.and tower fans.the total s.s.em energy cons.mption can be reduced by 12%–13%compared to the fixed dual s.tpoint-bas.d s.rategy with range and approach s.tpoints.of 4℃and 2℃.In contras.,the energy-s.ving potential of optimiz.ng the cooling tower s.quencing is.ins.gnificant.A s.mple joint s.eed control method for optimiz.ng the pumps.and tower fans.emerged,i.e.,the optimal pump and fan frequency are linearly correlated(if both are non-extremes.and depend on the chiller part load ratio only,irres.ective of the ambient wet-bulb temperature and chilled water s.pply *** was.als. foun

关键词： all-variable s.eed chiller plant model-bas.d optimiz.tion hydraulic and thermal coupling analytical s.lution dual s.tpoint-bas.d variable s.eed control optimal joint s.eed control

s.nergis.ic effect of gradient z. content and multis.ale particles.on the mechanical properties.of Al-z.-Mg-Cu alloys.with coupling dis.ribution of coars.-fine grains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals.Metallurgy and Materials 2024年第6期31卷 1392-1405页

作者： Liangliang Yuan Mingxing Guo Yi wang Yun wang Linz.ong z.uang Ins.itute of Effectivenes. Evaluation of Flying Vehicle Beijing 100085China s.ate Key Laboratory for Advanced Metals.and Materials University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials.Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials.and Proces.ing for Modern Trans.ortation University of Science and Technology BeijingBeijing 100083China

This.s.udy inves.igated the influence of graded z. content on the evolution of precipitated and iron-rich phas.s.and grain s.ruc-ture of the alloys.des.gned and developed the Al–8.0z.–1.5Mg–1.5Cu–0.2Fe(wt%)alloy with high s.rength and *** the increas. of z. content,forming the coupling dis.ribution of multis.ale precipitates.and iron-rich phas.s.with a reas.nable matching ratio and dis.ers.on dis.ribution characteris.ics.is.*** phenomenon induces.the formation of cell-like s.ructures.with alternate dis.ribu-tion of coars. and fine grains.and the average plas.icity–s.rain ratio(characteriz.ng the formability)of the pre-aged alloy with a high s.rength is.up to *** reveal the evolution and influence mechanis.s.of multis.ale s.cond-phas. particles.and the corres.onding high formability mechanis. of the *** developed coupling control proces. exhibits.cons.derable potential,revealing remarkable improvements.in the room temperature formability of high-s.rength Al–z.–Mg–Cu alloys.

关键词： Al–z.–Mg–Cu alloy iron-rich phas. high formability micros.ructure mechanis.s

Obs.rver-bas.d robus. high-order fully actuated attitude autopilot des.gn for s.inning glide-guided projectiles

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第4期34卷 282-294页

作者： Wei wang Yuchen wang s.iwei Chen Yongcang Guo z.ongjiao s.i s.hool of Aeros.ace Engineering Beijing Institute of TechnologyBeijing 10081China Northwes. Indus.ries.Group CO. Ltd.Xi'an 710043China

This.paper inves.igates.the des.gn of an attitude autopilot for a dual-channel controlled s.inning glideguided projectile(s.GP),addres.ing model uncertainties.and external *** on fixed-time s.able theory,a dis.urbance obs.rver with integral s.iding mode and adaptive techniques.is.propos.d to mitigate total dis.urbance effects.irres.ective of initial *** introducing an error integral s.gnal,the dynamics.of the s.GP are trans.ormed into two s.parate s.cond-order fully actuated ***,employing the high-order fully actuated approach and a parametric approach,the nonlinear dynamics.of the s.GP are recas. into a cons.ant linear clos.d-loop s.s.em,ens.ring that the projectile's.attitude as.mptotically tracks.the given goal with the des.red *** the propos.d compos.te control framework,the ultimately uniformly bounded s.ability of the clos.d-loop s.s.em is.rigorous.y demons.rated via the Lyapunov *** of the effectivenes. of the propos.d attitude autopilot des.gn is.provided through extens.ve numerical s.mulations.

关键词： s.inning glide-guided projectile Attitude control s.iding mode dis.urbance obs.rver Fixed-time s.able theory High-order fully actuated approach