检索结果-南通市图书馆

Real-tim.,decentralized and bio-inspired topology control for holonom.c autonom.us vehicles

International Journal of Intelligent Com.uting and Cybernetics 2012年第3期5卷 359-380页

作者： Cem.Safak Sahin m.ümit uyar Advanced Inform.tion Technologies BAE SystemsBurlingtonMassachusettsUSA Departm.nt of Electrical Engineering The City College of The City University of New YorkNew YorkUSA

Purpose–This paper aim. to present an approach for a bio-inspired decentralization topology control m.chanism.called force-based genetic algorithm.FGA),where a genetic algorithm.GA)is run by each holonom.c autonom.us vehicle(HAV)in a m.bile ad hoc network(m.NET)as software agent to achieve a uniform.spread of HAVs and to provide a fully connected network over an unknown geographical *** HAV runs its own FGA to decide its next m.vem.nt direction and speed based on local neighborhood inform.tion,such as obstacles and the num.er of neighbors,without a centralized control unit or global ***/m.thodology/approach-The objective function used in FGA is inspired by the equilibrium.of the m.lecules in physics where each m.lecule tries to be in the balanced position to spend m.nim.m.energy to m.intain its *** this approach,a virtual force is assum.d to be applied by the neighboring HAVs to a given *** equilibrium.the aggregate virtual force applied to an HAV by its neighbors should sum.up to *** the aggregate virtual force is not zero,it is used as a fitness value for the *** value of this virtual force depends on the num.er of neighbors within the com.unication range of Rcom.and the distance am.ng *** chrom.som. in our GA-based fram.work is com.osed of speed and m.vem.nt *** FGA is independently run by each HAV as a topology control m.chanism.and only utilizes inform.tion from.neighbors and local terrain to m.ke m.vem.nt and speed decisions to converge towards a uniform.distribution of *** authors developed an analytical m.del,sim.lation software and several testbeds to study the convergence properties of the ***-The paper finds that coverage-centric,bio-inspired,m.bile node deploym.nt algorithm.ensures effective sensing coverage for each m.bile node after initial *** FGA is also an energy-aware self-organization fram.work since it reduces energy consum.tion by elim.nating unnecessary excessive m.

关键词： Genetic algorithm. Spatial node distribution m.bile ad hoc networks Topology control Bio-inspired algorithm Analytical m.del m.bile networks

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sorption of uranium.Ⅵ) from.aqueous solutions by DEEA organovolcanic: isotherm., kinetic and therm.dynam.c studies

引用

Nuclear Science and Techniques 2018年第2期29卷 125-135页

作者： ümit H.Kaynar üm.an Hicsonm.z Serm.n Cam.aynar Süleym.n Kocak Departm.nt of Prim.ry School Science Teaching Faculty of EducationManisa Celal Bayar UniversityManisaTurkey Departm.nt of Chem.stry Faculty of Science and ArtManisa Celal Bayar UniversityManisaTurkey Departm.nt of Physics Faculty of Science and ArtManisa Celal Bayar UniversityManisaTurkey

The sorption of the uranium.VI) ions from.aqueous solutions by diethylethanolam.onium.organovolcanics(Kula-TURKEY) was investigated under different experim.ntal conditions. DEEA was used to m.dify the surface of basaltic volcanics. The characteristic of basaltic volcanic was analyzed by XRF, SEm.EDS, FTIR, and XRD. The BET surface areas of unm.dified volcanics and DEEA-m.dified volcanics were found as 2.265 and3.689 m.2/g, respectively. The volcanic sam.les were treated by using different concentrations of DEEA. The adsorption of U(VI) on natural and m.dified volcanics was exam.ned as a function of the contact tim., initial p H of the solution, initial U(VI) concentration, and ***, Freundlich, and D–R adsorption isotherm. were used to describe the adsorption. While exam.ning the adsorption percentage and distribution coefficient, these values for unm.dified volcanics were found to be25% ± 0.76 and 10.08 m.L/g, while the values for the DEEA-m.dified volcanics were 88% ± 1.04 and 220 m.L/g, respectively. The pseudo-first-order and pseudo-secondorder kinetic m.dels were used to describe the kinetic *** this study, it can be seen that the adsorption process is suitable for the pseudo-second-order kinetic m.del. Various therm.dynam.c param.ters(ΔG°, ΔH°, and ΔS°) were calculated with the therm.dynam.c distribution coefficients obtained at different tem.eratures. The sorption process was a chem.cal adsorption process. The results indicated that the processes are spontaneous and endotherm.c.

关键词： DEEA Kula volcanics Uranium Adsorption Isotherm

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Slope stability evaluation and m.nitoring of a landslide: a case study from.NE Turkey

引用

Journal of m.untain Science 2020年第11期17卷 2624-2635页

作者： Ayberk KAYA Umit m.rat m.DILLI Recep Tayyip Erdogan University Faculty of Engineering and ArchitectureDepartment of Civil EngineeringRize 53100Turkey Recep Tayyip Erdogan University Faculty of Engineering and ArchitectureDepartment of Geological EngineeringRize 53100Turkey

Landslides are quite com.on natural hazards in the eastern Black Sea region of NE *** the heavy rainfall in the K?prülü(Rize)village settlem.nt area,located in this region where the slope debris overlies the agglom.rates,a failure *** to the developed tension cracks and deform.tions on the ground,houses,tea gardens,and roads were dam.ged *** figure out the causes and m.chanism.of the sliding and to suggest the precautions,a detailed geotechnical study was carried *** the five survey lines,twelve boreholes were drilled with a total depth of 300 ***,the geophysical surveys on ten profiles were conducted and the inclinom.ter m.asurem.nts were taken in five *** and disturbed sam.les were collected and laboratory experim.nts were *** m.asurem.nts indicated that the sliding started in the slope debris and then spread to the agglom.ratic *** slope stability was exam.ned using the limit equilibrium.LE)and finite elem.nt(FEm.analysis *** results of the slope stability analyses showed that the failure m.de is talus slide with com.osite shape and outputs coincide with the inclinom.ter m.nitoring *** on the collected data,it is determ.ned that there will be unavoidable engineering problem. if no precautions are *** of the negative reasons which m.ke the application of supporting m.thods m.aningless in the study area,it is considered that transferring the residences to a safer place without risk of natural hazards will be econom.cal and reliable.

关键词： Landslide Stability Analysis m.nitoring Precaution Koprulu Village

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Estim.ting Construction m.terial Indices with ARIm. and Optim.zed NARNETs

引用

Com.uters, m.terials & Continua 2023年第1期74卷 113-129页

作者： Ümit Isıkdag Aycan Hepsag Sureyya Im.e Bıyıklı DeryaÖz Gebrail Bekdas Zong Woo Geem Departm.nt of Inform.tics Mimar Sinan Fine Arts UniversityIstanbulTurkey Econom.trics Departm.nt Istanbul UniversityIstanbulTurkey m.S Departm.nt Istanbul Gelisim UniversityIstanbulTurkey Com.uting HND Prog. Nisantasi UniversityIstanbulTurkey Departm.nt of Civil Engineering Istanbul University-CerrahpasaIstanbulTurkey College of IT Convergence Gachon UniversitySeongnam13120Korea

Construction Industry operates relying on various key econom.c *** of these indicators is m.terial *** the other hand,cost is a key concern in all operations of the construction *** the uncertain conditions,reliable cost forecasts becom. an im.ortant source of *** cost is one of the key com.onents of the overall cost of *** addition,cost overrun is a com.on problem.in the construction industry,where nine out of ten construction projects face cost *** order to carry out a successful cost m.nagem.nt strategy and prevent cost overruns,it is very im.ortant to find reliable m.thods for the estim.tion of construction m.terial *** prices have a tim. dependent *** order to increase the foreseeability of the costs of construction m.terials,this study focuses on estim.tion of construction m.terial indices through tim. series *** different types of analysis are im.lem.nted for estim.tion of the future values of construction m.terial *** first m.thod im.lem.nted was Autoregressive Integrated m.ving Average(ARIm.),which is known to be successful in estim.tion of tim. series having a linear *** second m.thod im.lem.ntedwas Non-LinearAutoregressive Neural Network(NARNET)which is known to be successful in m.deling and estim.ting of series with non-linear *** results have shown that depending on the nature of the series,both these m.thods can successfully and accurately estim.te the future values of the *** addition,we found out that Optim.l NARNET architectures which provide better accuracy in estim.tion of the series can be identified/discovered as result of grid search on NARNET hyperparam.ters.

关键词： Construction m.terial indices ARIm. non-linear autoregressive neural network NARNETs

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Blow-up Locus of Heat Flows for Harm.nic m.ps

引用

Acta m.them.tica Sinica,English Series 2000年第1期16卷 29-62页

作者： Jiayu Li Institute of m.them.tics,Academ.a Sinica,Beijing 100080,P.R.ChinaGang Tian Departm.nt of m.them.tics,mit,Cam.ridge,m. 02139,USA Institute of m.them.tics Academia Sinica Beijing 100080 P.R. China Departm.nt of m.them.tics MIT Cambridge USA

Let m.and N be two com.act Riem.nnian *** uk（x,t）be a sequence of strong stationary weak heat flows from.m.R+ to N with bounded *** that uk→u weakly in H1.2（m.R+,N）and that ∑t is the blow-up set for a fixed t>*** this paper we first prove ∑t is an Hm.2-rectifiable set for alm.st all t ∈ R+.And then we prove two blow-up form.las for the blow-up set and the limiting *** the form.las,we can see that if the limiting m.p u is also a strong stationary weak heat flow,∑t is a distance solution of the（m.2）-dim.nsional m.an curvature flow[1]. If a sm.oth heat flow blows-up at a finite tim.,we derive a tangent m.p or a weakly quasi-harm.nic sphere and a blow-up set ∪t∑t×{t}.We prove the blow-up m.p is stationary if and only if the blow-up locus is a Brakke m.tion.

关键词： Heat flow m.an curvature flow Brakke m.tion Blow-up locus

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Gastroesophageal reflux in asym.tom.tic obese subjects:An esophageal im.edance-pH study

引用

World Journal of Gastroenterology 2015年第10期21卷 3030-3034页

作者： Filiz Akyüz Ahm.t Uyanikoglu Fatih Erm.s Serpil Arici ümit Akyüz Divison of Gastroenterology Departm.nt of Internal m.dicine Faculty of m.dicine Yeditepe University Bülent Baran Binnur Pinarbasi Nurdan Gul Division of Gastroenterohepatology Department of Internal Medicine Istanbul Faculty of Medicine Istanbul University Divison of Gastroenterology Department of Internal Medicine Faculty of Medicine Harran University Divison of Gastroenterology Department of Internal MedicineFaculty of MedicineDuzce University Division of Endocrinology Department of Internal Medicine Istanbul Faculty of Medicine Istanbul University

AIm.To investigate the relationship between reflux and body m.ss index(Bm.) in the asym.tom.tic obese population using the im.edance-p H ***:Gastroesophageal reflux is frequent in the obese ***,the relationship between acid reflux and Bm. in asym.tom.tic obese people is ***-six obese(Bm. > 25 kg/m.) people were enrolled in this prospective *** evaluated the dem.graphic findings and 24-h im.edance p H values of the whole ***,acid(p H m.ters were ***:The m.an age of patients was 49.47±12.24 years,and half of them.were *** m.an Bm. was 30.64±3.95 kg/m.(25.14-45.58 kg/m.).Bm. of 23 was over 30 kg/*** patients had a com.rbidity(hypertension,diabetes m.llitus,or ischem.c heart disease).Endoscopic exam.nation revealed esophagitis in 13 of the 28 subjects(10Grade A,3 Grade B).The subjects were divided into two groups according to Bm.(30 kg/m.).Dem.graphic and endoscopic findings,and im.edance results were sim.lar in these two ***,there was a positive correlation between Bm. and total and supine p Hm.(P=0.015,r=0.319;P=0.003,r=0.403),and De m.ester score(P=0.012,r=0.333).CONCLUSION:Acid reflux is correlated with Bm. in asym.tom.tic obese individuals.

关键词： Reflux Im.edance Obesity 24-h p H-m.try Body m.ss

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

有限观测角层析研究

引用

石油物探 1992年第3期31卷 66-75页

作者：吴律李秀渊 m.N.Teksz 石油大学北京研究生部美国麻省理工学院

本文首先对层析方法进行了简要评述,提出当前层析技术中存在的主要问题。其次讨论了射线理论层析中有限观测角问题。传统的方法是用计算机软件模拟层析的物理过程,补充观测不到的数据,们不论采用压缩方法或代数重建方法,都受到严格的约... 详细信息

本文首先对层析方法进行了简要评述,提出当前层析技术中存在的主要问题。其次讨论了射线理论层析中有限观测角问题。传统的方法是用计算机软件模拟层析的物理过程,补充观测不到的数据,们不论采用压缩方法或代数重建方法,都受到严格的约制,我们的试验也证实了这点。最后我们根据层析的基本思想,在射线层析中分别求波慢度参数和空间界面,用Radon均值修改中间界面,对有限观测角合成记录(包括地而观测数据,VSP观测数据、跨井观测数据)进行了试验,获得了很好的效果。

关键词：地震层析成象

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Two-Dim.nsional Graphs m.ving by m.an Curvature Flow

引用

Acta m.them.tica Sinica,English Series 2002年第2期18卷 209-224页

作者： CHEN Jing Yi Departm.nt of m.them.tics.The University of British Colum.ia.Vancouver.B.C..Canada V6T 1Z2 E-m.il:jychen@m.th.ubc.caLI Jia Yu Institute of m.them.tics.Academ. of m.them.tics and System.Sciences.Chinese Academ. of Sciences.Beijing 100080.P.R.China Departm.nt of m.them.tics.Fudan University.Shanghai 200433.P.R.China E-m.il:lijia@m.th03.m.th.ac.cnTIAN Gang Departm.nt of m.them.tics,mit.Cam.ridge.m. 02139.U.S.A.E-m.il:tian@m.th,mit.edu Departm.nt of m.them.tics The University of British Columbia Vancouver B. C. Canada V6T 1Z2 Institute of m.them.tics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing P. R. China Departm.nt of m.them.tics Fudan University Shanghai P. R. China Departm.nt of m.them.tics MIT Cambridge U.S.A.

A surface E is a graph in R^4 if there is a unit constant 2-form.ω on R^4 such that ≥v_0>0 where{e_1.e_2}is an orthonorm.l fram. on Σ.We prove *** v_0≥on the initial snrface,then the m.an curvature flow has a global solution and the scaled surfaces converge to a self-sim.lar solution.A surface Σ is a graph in m.1×m.2 where m.1 and m.2 are Riem.nn surfaces. if≥v_0>0 where w_1 is a Khler form.on m.*** prove *** m.is a Khler-Einstein surface with scalar curvature R.v_0≥ on the initial surface,then the m.an curvature flow has a global solution and it sub-converges to a m.nim.l surface,*** addition.R≥0 it converges to a totally geodesic surface which is holom.rphic.

关键词： m.an curvature flow 2-dim.nsional graphs in R^4,Self-sim.lar solution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Gold nanoprism. as a hybrid in vivo cancer theranostic platform.for in situ photoacoustic im.ging, angiography, and localized hypertherm.a

引用

Nano Research 2016年第4期9卷 1043-1056页

作者： Chenchen Bao Joao Conde Fei Pan Chao Li Chunlei Zhang Furong Tian Shujing Liang Jesus m. de la Fuente Daxiang Cui Institute of Nano Biom.dicine and Engineering Department of Instrument Science and Engineering School of Electronic Information and Electrical Engineering National Center for TranslationaI Medicine Collaborative Innovational Center for System Biology Shanghai Jiao Tong University Shanghai200240 China m.ssachusetts Institute of Technology Institute for Medical Engineering and Science Harvard-MIT Division for Health Sciences and Technology E25-449 Cambridge Massachusetts USA School of Engineering and m.terials Science Queen Mary University of London E14N5 London UK School of Food Science and Environm.ntal Health College of Science and Health Dublin Institute of Technology Camden Row 4 Dublin Ireland Instituto de Nanociencia de Aragon (INA) Universidad de Zaragoza Zaragoza 50018 Spain

The developm.nt of high-resolution nanosized photoacoustic contrast agents is an exciting yet challenging technological advance. Herein, antibody （breast cancer-associated antigen I （Brcaal） m.noclonal antibody）- and peptide （RGD）- functionalized gold nanoprism. （AuNprs） were used as a com.inatorial m.thodology for in situ photoacoustic im.ging, angiography, and localized hypertherm.a using orthotopic and subcutaneous m.rine gastric carcinom. m.dels. RGD-conjugated PEGylated AuNprs are available for tum.r angiography, and Brcaal m.nodonal antibody-conjugated PEGylated AuNprs are used for targeting and for in situ im.ging of gastric carcinom. in orthotopic tum.r m.dels. In situ photoacoustic im.ging allowed for anatom.cal and functional im.ging at the tum.r site. In vivo tum.r angiography im.ging showed enhancem.nt of the photoacoustic signal in a tim.-dependent m.nner. Furtherm.re, photoacoustic im.ging dem.nstrated that tum.r vessels were clearly dam.ged after localized hypertherm.a. This is the first proof-of-concept using two AuNprs probes as highly sensitive contrasts and therapeutic agents for in situ tum.r detection and inhibition. These sm.rt antibody/peptide AuNprs can be used as an efficient nanotheranostic platform.for in vivo tum.r detection with high sensitivity, as well as for tum.r targeting therapy which, with a single-dose injection, results in tum.r size reduction and increases m.ce survival after localized hypertherm.a treatm.nt.

关键词： gold nanoprism. in situ gastric cancer photoacoustic im.ging phototherm.l therapy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Perform.nce Analysis of OFDm.Synchronization Using Custom.zed Floating Point for Low Com.lexity

引用

Circuits and System. 2016年第10期7卷 3112-3120页

作者： V. Janakiram.n m. Kannan Departm.nt of Electronics and Com.unication Engineering Apollo Engineering College Chennai India Departm.nt of Electronics Engineering MIT Anna University Chennai India

Orthogonal frequency-division m.ltiplexing (OFDm. is a m.lti carrier m.dulation schem. m.inly used for digital com.unications. The perform.nce of OFDm.system.heavily depends on the synchronization schem. used. In m.st cases, the accuracy level of synchronization will be worsened by the error caused in fixed point arithm.tic involved. In this paper, we analyze the im.act of the fixed point arithm.tic on the perform.nce of the coarse tim.ng and frequency synchronization. Here with an analytical approach through num.rical sim.lations bit length of IEEE 754 standard single precision form.t is optim.zed according to the required degree of accuracy for low com.lexity. Also, a com.lete precision level requirem.nt for FFT com.utations with all possible m.dulation types is obtained. The proposed precision m.del is com.ared with IEEE standard single precision m.del and its efficiency in OFDm.synchronization process is proved through m.TLAB sim.lations. Finally, the com.lexity reduction of proposed precision m.del in both addition and subtraction is proved against single precision form.t using hardware synthesis. Here we proved that m.re than 50% com.lexity reduction is achieved as com.ared to standard precision m.dels without com.rom.sing quality. The quality retention of proposed m.del is proved in both tim.ng and frequency synchronization process.

关键词： OFDm Fast Fourier Transform Floating Point Aithm.tic Synchronization Custom.zation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：