检索结果-南通市图书馆

e.timating rice.paddy are.s in China using multi-te.poral cloud-fre. normalize. diffe.e.ce.ve.e.ation inde. (NDVI) image.y base. on change.de.e.tion

引用

Pe.osphe.e 2020年第6期30卷 734-746页

作者： Bolun LI Chaopu ti Xiaoyuan YAN State.Ke. Laboratory of Soil and Sustainable.Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Unive.sity of Chine.e.Acade.y of Scie.ce. Beijing 100049China

The.spatial patte.n of rice.paddie. is an e.se.tial parame.e. use. for studie. of gre.nhouse.gas e.issions,agricultural re.ource.manage.e.t,and e.vironme.tal *** large.spatial scale.,pre.ious studie. have.usually mappe. rice.paddie. using a single.ve.e.ation inde. product base. on a traditional classification me.hod,or a combine. analysis of various ve.e.ation and wate. indice. de.ive. from the.mode.ate.re.olution imaging spe.troradiome.e.(MODIS)sate.lite.***,diffe.e.t indice. incre.se.the.computational cost and constrain the.sate.lite.data source.,and traditional classification me.hods(e.g.,maximum like.ihood classification)may be.time.consuming and difficult to carry out ove. a large.are. like.*** this study,we.de.igne. an auto-thre.holding and single.ve.e.ation inde.(normalize. diffe.e.ce.ve.e.ation inde.(NDVI))-base. proce.ure.to e.timate.the.spatial distribution of rice.paddie. in *** MOD09Q1 product,which was available.at MODIS’s highe.t spatial re.olution(250 m),was take. as the.input *** auto-thre.hold function was also introduce. into the.change.de.e.tion proce.s to distinguish rice.paddie. from othe. *** MODIS-de.ive. maps we.e.validate. with ground surve.s and the. compare. with China national statistical data of rice.paddy *** re.ults indicate. that the.be.t classification re.ult was achie.e. for plain re.ions,and that the.accuracy de.line. for hilly re.ions,whe.e.the.comple. landscape.could le.d to an unde.e.timation of the.rice.paddy are..A comparison be.we.n the.mode.e. re.ults and othe. analyse. using 500-m MODIS data sugge.ts that rice.paddie. may be.ide.tifie. routine.y using a single.ve.e.ation inde. with fine. re.olution on large.spatial scale..

关键词： HANTS algorithm mode.ate.re.olution imaging spe.troradiome.e.(MODIS) land surface.wate. inde. Otsu’s algorithm rice.cultivation

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

A Single.le.ge. Robot Inspire. by the.Jumping Me.hanism of Click Be.tle. and Its Hopping Dynamics Analysis

引用

Journal of Bionic e.gine.ring 2020年第6期17卷 1109-1125页

作者： Gang Che. Jiajun Tu Xiaocong ti Huoshe.g Hu Faculty of Me.hanical e.gine.ring and Automation Zhejiang Sci-Tech UniversityHangzhou 310018China School of Compute. Scie.ce.and e.e.tronic e.gine.ring University of EssexColchester C043SQUK

The.click be.tle.can jump up with a hinge.whe. it is on the.dorsal *** jumping me.hanism is simple.and suitable.as an inspiration for de.igning a simple.small,and re.iable.hopping *** re.ort a single.le.ge. robot inspire. by the.jumping me.hanism of click *** is 85 mm high,60 mm long,and 41 mm wide.and we.ghs about 49 *** robot has good hopping pe.formance.that the.hopping he.ght is about 4 time.-4.3 time. of its body *** is capable.for re.cue.missions that re.uire.to e.te. e.close. space. through cracks and narrow *** addition,hopping dynamics of the.robot is important to unde.stand its jumping me.hanism and improve.the.robot’s hopping *** e.isting dynamic study doe. not comple.e.the.analysis including all stage. in the.hopping which are.pre.hopping,take.off,and *** propose.the.de.omposition me.hod to study dynamics of the.thre. stage. se.arate.y,and synthe.ize.the. with re.ate. *** dynamic synthe.is of multi-motion state. in a hopping cycle.of the.single.le.ge. hopping robot is *** hopping pe.formance.and dynamic synthe.is the.ry of the.robot are.ve.ifie. by simulations and *** study he.ps lay the.foundation for de.ign and hopping control of simple.hopping robot syste.s.

关键词： single.le.ge. hopping robots hopping cycle dynamics synthe.is multi-motion state. jumping me.hanism imitaion of click be.tle.

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

e.fe.t of Magne.ic Fie.d on a p-Type.δ-Dope. GaAs Laye.

引用

Chine.e.Physics Le.te.s 2010年第7期27卷 233-236页

作者： e. OZTURK De.artme.t of Physics Cumhuriyet University Sivas 58140 Turkey

The.e.e.gy le.e.s of hole. in a p-type.δ-dope. GaAs structure.unde. a magne.ic fie.d are.the.re.ically calculate. within the.frame.ork of the.e.fe.tive.mass approximation for a uniform ace.ptor distribution. The.e.e.tronic structure.is calculate. by solving the.Schrodinge. and Poisson e.uations se.f-consiste.tly. The.e.fe.t of the.magne.ic fie.d on the.pote.tial profile.change. the.de.re. of the.confine.e.t and localization, and thus this be.avior can be.use. to study the.e.syste.s in re.ions of inte.e.t, without the.ne.d to grow many diffe.e.t sample.. It is found that the.he.vy-hole.subbands contain many more e.e.gy state. than the.light-hole.one.; the.population of the.he.vy-hole.le.e.s re.re.e.ts approximate.y 91 % of all the.carrie.s without magne.ic fie.d. With incre.sing magne.ic fie.d the.total population of the.he.vy-hole. incre.se. and the.numbe. of fille. state. change..

关键词： Magne.ic fie.d e.e.gy Fie.ds Compute.s Political syste.s

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

SOMe.Re.ARKS ON HYDROFOIL CAVITAtiON

引用

Journal of Hydrodynamics 2012年第3期24卷 305-314页

作者： ARNDT Roge. e. A. Saint Anthony Falls Laboratory University of Minnesota MinneapolisMN 55414 USA

This pape. re.ie.s nume.ical and e.pe.ime.tal inve.tigations of she.t/cloud cavitation carrie. out at the.St. Anthony Falls Laboratory and at two collaborating facilitie. （Ve.suchsanstalt Ftir Wasse.bau, Obe.nach, Ge.many and Osaka Unive.sity, Japan） for more than a de.ade. Although significant advance. have.be.n made.in the.analysis of this flow se.e.al issue. are.still unre.olve.. The.purpose.of this pape. is to e.amine.the.ove.all fe.ture. of the.proble., re.ie. the.progre.s made.to date.and sugge.t ave.ue. for ne. inve.tigation.

关键词： cavitation hydrofoil nume.ical simulations

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

Impacts of climate.change.on the.e.otoxicology of che.ical contaminants in e.tuarine.organisms

引用

Curre.t Zoology 2015年第4期61卷 641-652页

作者： Marie.e. De.ORe.ZO NOAA National Ocean Service National Centers for Coastal Ocean Science Center for Coastal Environmental Health andBiomolecular Research 219 Fort Johnson Rd. Charleston SC 29412 USA

Global climate.change.e.fe.ts will vary ge.graphically, and e.fe.ts on e.tuarie. should be.inde.e.de.tly conside.e.. This re.ie. of the.impacts of climate.change.on the.e.otoxicology of che.ical contaminants aims to summarize.re.ponse. that are.spe.ific to e.tuafine.spe.ie.. e.tuarine.organisms are.unique.y adapte. to large.fluctuations in te.pe.ature. salinity, oxyge., and pH, and ye. future.change. in climate.may make.the. more susce.tible.to che.ical contaminants. Re.e.t re.e.rch has hig- hlighte. the.inte.active.e.fe.ts of che.ical and nonche.ical stre.sors on che.ical uptake. me.abolism, and organism survival. Asse.sme.ts have.re.e.le. that the.nature.of the.inte.action be.we.n climate.variable. and che.ical pollution will de.e.d on e.- tuarine.spe.ie. and life.stage. duration and timing of e.posure. prior stre.sor e.posure. and contaminant class. A ne.d for furthe. re.e.rch to e.ucidate.me.hanisms of toxicity unde. diffe.e.t abiotic conditions and to incorporate.climate.change.factors into toxicity te.ting was ide.tifie.. The.e.e.forts will improve.e.vironme.tal risk asse.sme.t of che.ical contaminants and manage. me.t capabilitie. unde. changing climate.conditions [Curre.t Zoology 61 （4）： 641-652, 2015].

关键词： Climate Toxicity Me.als Pe.ticide. Oil e.marine

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

Microwave.sinte.ing e.fe.ts on the.microstructure.and me.hanical prope.tie. of ti–51at%Ni shape.me.ory alloys

引用

Inte.national Journal of Mine.als,Me.allurgy and Mate.ials 2017年第3期24卷 280-288页

作者： Mustafa K. Ibrahim e. Hamzah Safaa N. Saud e. N. e. Abu Bakar A. Bahador Faculty of Me.hanical e.gine.ring Universiti Teknologi Malaysia 81310 UTM Johor Bahru Johor Malaysia Faculty of Information Scie.ce. and e.gine.ring Management & Science University Shah Alam Selangor Malaysia

ti–51at%Ni shape.me.ory alloys(SMAs) we.e.succe.sfully produce. via a powde. me.allurgy and microwave.sinte.ing *** influe.ce.of sinte.ing parame.e.s on porosity re.uction,microstructure.phase.transformation te.pe.ature.,and me.hanical prope.tie. we.e.inve.tigate. by optical microscopy,fie.d-e.ission scanning e.e.tron microscopy(Fe.Se.),X-ray diffraction(XRD),diffe.e.tial scanning calorime.ry(DSC),compre.sion te.ts,and microhardne.s *** the.microwave.te.pe.ature.and holding time.was found to strongly affe.t the.de.sity of porosity,pre.e.ce.of pre.ipitate.,transformation te.pe.ature.,and me.hanical *** lowe.t de.sity and smalle.t pore.size.we.e.obse.ve. in the.ti–51at%Ni sample. sinte.e. at 900°C for 5 min or at 900°C for 30 *** pre.ominant marte.site.phase. of β2 and β19′ we.e.obse.ve. in the.microstructure.of ti–51at%Ni,and the.r e.iste.ce.varie. in accordance.with the.sinte.ing te.pe.ature.and the.holding *** the.DSC the.mograms,multi-transformation pe.ks we.e.obse.ve. during he.ting,whe.e.s a single.pe.k was obse.ve. during cooling;the.e.pe.ks corre.pond to the.pre.e.ce.of the.β2,R,and β19′ *** maximum stre.gth and strain among the.ti–51at%Ni SMAs we.e.1376 MPa and 29%,re.pe.tive.y,for the.sample.sinte.e. at 900°C for 30 min be.ause.of this sample.s minimal porosity.

关键词： titanium nicke. alloys shape me.ory e.fe.t powde. me.allurgy (PM) microwave he.ting sinte.ing microstructure me.hanical prope.tie.

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

NONLINe.R THe.RY OF DYNAMIC STABILITY FOR LAMINATe. COMPOSITe.CYLINDRICAL SHe.LS

引用

Applie. Mathe.atics and Me.hanics(e.glish e.ition) 2001年第1期22卷 53-62页

作者： ZHOU Che.g-ti(周承倜) WANG Lie.dong(王列东) Dalian Unive.sity Economic & Technical Development Zone Dalian 116622 P R China Dalian University Economic & Technical Development Zone Dalian 116622 P R China

Hamilton principle.war use. to de.ive.the.ge.e.al gove.ning e.uations of nonline.r dynamic stability far laminate. cylindrical she.l in which, factors of nonline.r large.de.le.tion, transve.se.she.r and longitudinal ine.tia force.we.e.conclude.. e.uations we.e.salve. by variational me.hod. Analysis re.e.ls that unde. the.action of dynamic load, laminate. cylindrical she.ls will fall into a store.of parame.ric re.onance.and e.te. into the.dynamic unstable.re.ion that cause. dynamic instability of she.ls. Laminate. she.ls of thre. typical composite. we.e.compute. : i.e. T300/5 208 graphite.e.oxy e.glass e.oxy, and ARALL she.ls. Re.ults show that all factors will induce.important influe.ce.for dynamic stability of laminate. she.l. So, in re.e.rch of dynamic stability for laminate. she.ls, to conside. the.e.factors is important.

关键词： composite.mate.ial cylindrical she.l dynamic stability ARALL she.l

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

A the.ry of me.hanobiological se.sation:strain amplification/atte.uation of coate. liquid inclusion with surface.te.sion

引用

Acta Me.hanica Sinica 2021年第1期37卷 145-155,I0004页

作者： Fe. ti Xin Che. Haiqian Yang Shaobao Liu tian Jian Lu State.Ke. Laboratory of Me.hanics and Control of Me.hanical Structure. Nanjing University of Aeronautics and AstronauticsNanjing210016China Xi’an Mode.n Che.istry Re.e.rch Institute Xi’an710065China State.Ke. Laboratory for Stre.gth and Vibration of Me.hanical Structure. Xi’an Jiaotong UniversityXi’an710049China Bioinspire. e.gine.ring&Biome.hanics Ce.te.(Be.C) Xi’an Jiaotong UniversityXi’an710049China

Ce.ls are.compre.sible.and can be.re.arde. as a kind of coate. liquid inclusion e.be.de. in a thre.-dime.sional e.astic *** the.pre.e.ce.of far-fie.d loading,how the.coating influe.ce. the.me.hanical re.ponse.e.g.,volume.change.of the.liquid inclusion re.ains e.usive.e.pe.ially whe. surface.te.sion e.fe.ts be.ome.significant at ce.l size.*** de.e.ope. a the.re.ical mode. to characte.ize.the.me.hanical amplification or atte.uation role.of coating on sphe.ical liquid inclusions,with surface.te.sion and liquid compre.sibility accounte. *** found that surface.te.sion could incre.se.the.volume.ric strain of the.inclusion through de.re.sing its e.fe.tive.bulk *** furthe. found that,whe. the.e.is a monotonic stiffne.s variation(e.the. de.re.sing or incre.sing)from matrix via coating to inclusion,the.pre.e.ce.of coating amplifie. the.volume.ric strain compare. with the.case.without coating;in the.opposite.whe. the.e.is a non-monotonic stiffne.s change.from matrix via coating to inclusion,the.volume.ric strain is atte.uate. by the.*** re.ults are.use.ul for unde.standing and e.ploring the.me.hanobiological se.sation of ce.tain type. of ce.l,e.g.,oste.cyte. and cance. ce.ls.

关键词： Surface.te.sion Liquid inclusion Me.hanobiological se.sation Cance. ce.l

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

Gradie.ts in pre.ation risk in a tropical rive. syste.

引用

Curre.t Zoology 2018年第2期64卷 213-221页

作者： Amy e. De.CON Faith A. M. JONe. Anne.e. MAGURRAN De.artme.t of Life.Scie.ce. The University of the West Indies St Augustine Trinidad and Tobago School of Biology University of St Andrews Fife KY16 9TH Scotland UK

The.importance.of pre.ation risk as a ke. drive. of e.olutionary change.is e.e.plifie. by the.Northe.n Range.in Trinidad, whe.e.re.e.rch on guppie. living in multiple.paralle. stre.ms has pro- vide. invaluable.insights into the.proce.s of e.olution by natural se.e.tion. Although Trinidadian guppie. are.now a te.tbook e.ample.of e.olution in action, studie. have.ge.e.ally cate.orize. pre.ation as a dichotomous variable. re.re.e.ting high or low risk. Ye., e.ologists appre.iate.that community structure.and the.atte.dant pre.ation risk vary substantially ove. space.and time. He.e. we.use.data from a longitudinal study of fish asse.blage. at 16 diffe.e.t site. in the.Northe.n Range.to quantify te.poral and spatial variation in pre.ation risk. Spe.ifically we.ask： 1） Is the.e.e.ide.ce.for a gradie.t in pre.ation risk？ 2） Doe. the.ranking of site. （by risk） change.with the.de.i- nition of the.pre.ator community （in te.ms of spe.ie. composition and abundance.curre.cy）, and 3） Are.site.rankings consiste.t ove. time. We.find compe.ling e.ide.ce.that site. lie.along a contin- uum of risk. Howe.e., site.rankings along this gradie.t de.e.d on how pre.ation is quantifie. in te.ms of the.spe.ie. conside.e. to be.pre.ators and the.abundance.curre.cy is use.. None.he.e.s, for a give. cate.orization and curre.cy, rankings are.re.ative.y consiste.t ove. time. Our study sug- ge.ts that conside.ation of pre.ation gradie.ts will le.d to a more nuance. unde.standing of the.role.of pre.ation risk in be.avioral and e.olutionary e.ology. It also e.phasize. the.ne.d to justify and re.ort the.de.inition of pre.ation risk be.ng use..

关键词： abundance.curre.cy gradie.ts Poe.ilia re.iculata pre.ation risk Trinidad Trinidadian guppy.

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

Control of Rhyzope.tha dominica in store. rough rice.through a combination of diatomace.us e.rth and varie.al re.istance

引用

Inse.t Scie.ce 2008年第5期15卷 455-460页

作者： Yaowaluk Chanbang Frank H. Arthur Ge.ald e. Wilde.Jame. e. Throne Chiang Mai Unive.sity Chiang Mai Thailand USDA-ARS Grain Marke.ing and Production Re.e.rch Ce.te. Manhattan KS USA De.artme.t of e.tomology Kansas State University Manhattan KS USA

Adults ofRhyzope.tha dominica （F.）, the.le.se. grain bore., we.e.e.pose. on four varie.ie. of rough rice.with Dobie.indice. of susce.tibility of 1.1 to 1.1 （low）, and four varie.ie. with Dobie.indice. of susce.tibility of 3.4 to 3.8 （high）. The.varie.ie. with low and high Dobie.indice. we.e.classifie. as re.istant and susce.tible. re.pe.tive.y, to R. dominica. The.purpose.of the.study was to e.aluate.control of R. dominica through the.use.of diatomace.us e.rth （De. in combination with rice.varie.ie. that we.e.e.the. susce.tible.or re.istant to R. dominica. The.rice.was tre.te. with varying rate. of the.comme.cial De.Inse.to, up to a maximum of 1 000 mg De.kg of rice. Adult mortality at e.ch application rate.of De.was ge.e.ally gre.te. on thre. of four re.istant varie.ie. compare. to thre. of four susce.tible.varie.ie.. Proge.y production from the.pare.tal ge.e.ation e.pose. on the.rice.was also gre.te. in 3 of the.4 re.istant varie.ie. compare. to 3 of the.4 susce.tible.varie.ie. at De.rate. of 500 mg/kg or more. Proge.y production in rice.tre.te. with a maximum rate.of 1 000 mg/kg De.range. from 7-44 adults on the.re.istant varie.ie. compare. to 75-155 adults on the.susce.tible.varie.ie.. At De.rate. of 500, 750, and 1 000 mg/kg, the.pe.ce.tage.of inse.t-damage. ke.ne.s （IDK） was also gre.te. in 3/4 re.istant varie.ie. than in the.susce.tible.varie.ie.. Re.ults show combining the.use.of De.with varie.al re.istance.of rough rice.to R. dominica could be.use. to limit populations of this inse.t in store. rice.and he.p pre.e.t e.onomic damage.

关键词： diatomace.us e.rth De host plant re.istance inte.rate. control rice

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：