检索结果-南通市图书馆

Exceedance Probability of th. Standardized Precipitation-Evapotranspiration Index in th. Texas h.gh.Plains

Agricultural Sciences 2017年第8期8卷 783-800页

作者： Jerry E. Moorh.ad Gary W. marek Prasanna h. Gowda thomas h. marek Dana O. Porter Vijay P. Singh.David K. Brauer Conservation and Production Research.Laboratory USDA-ARS Bushland TX USA Grazinglands Research.Laboratory USDA-ARS El Reno OK USA Department of Biological and Agricultural Engineering Texas A&M AgriLife Research Amarillo TX USA Department of Biological and Agricultural Engineering Texas A&M AgriLife Research and Extension Service Lubbock TX USA Department of Biological and Agricultural Engineering Texas A&M University College Station TX USA

Drough. is a common occurrence in many arid and semi-arid regions th.t can h.ve large negative impacts on water resources and agricultural production. Since agricultural drough. is affected by both.water supply and demand (precipitation and evapotranspiration), it is beneficial to include both.in agricultural drough. monitoring. Th. Standardized Precipitation-Evapotranspiration Index (SPEI) was found to be a suitable drough. index for monitoring agricultural drough.. In th.s study, th. SPEI calculated from agro-meteorological weath.r stations was used to determine exceedance probabilities at five levels in th. Texas h.gh.Plains. In addition, th. kriging meth.d was used to interpolate between th. stations to generate spatial maps for th. exceedance probabilities. No significant differences were found between stations, indicating any station sh.uld be suitable to represent th. Texas h.gh.Plains. Results sh.wed drough. conditions occurred at all five probability levels during th. summer growing season for th.s region. Alth.ugh.differences were not significantly different, th. interpolated maps sh.wed a trend wh.re minor differences in th. SPEI values were associated with.th. West-East precipitation gradient. h.wever, th.re was no trend associated with.th. North.South.air temperature gradient. A risk analysis sh.wed th.t th. SPEI probability values can provide policy and decision makers with.additional information for better water management in th. Texas h.gh.Plains.

关键词： Drough. Semi-Arid Region Water Management Irrigation

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

Th. Ph.ton Polarization Parameter of 2h.n, γ）3h.reaction with.Inclusion of th. Electric Quadrupole Contribution

引用

Ch.nese Ph.sics Letters 2014年第9期31卷 32-35页

作者： h. Sadegh. M. Mosavi-Kh.nsari Department of Ph.sics Faculty of Science Arak University Arak 8349-8-38156 Iran

We use effective field th.ory （EFT） for th. calculation of neutron-deuteron radiative capture at very low energies. We present h.re th. use of EFT to calculate a low-energy ph.to-nuclear observable in th.ee-body systems, th. ph.ton polarization parameter and and fore-aft asymmetry at th.rmal neutron energies up to next-to-next to leading order （N2 LO）, with.inclasion of th. electric quadrupole contribution. Th. ph.ton polarization parameter in total is found to be Rc = -0.421±0.003 and is in good agreement with.th. oth.r modern th.oretical calculations based on modern nucleon-nucleon potentials. In comparison with.our previous work, a satisfactory agreement with.th. available experimental data is found by inclusion of th. electric quadrupole contribution.

关键词： Ph.TONS -- Polarization RESEARCh FIELD th.ory (Ph.sics) NEUTRON-deuteron interactions QUADRUPOLES Th.EE-body problem (Ph.sics)

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

Self-Repairing Membranes for Inflatable Structures Inspired by a Rapid Wound Sealing Process of Climbing Plants

引用

Journal of Bionic Engineering 2011年第3期8卷 242-250页

作者： Markus Rampf Olga Speck thomas Speck Rolf h. Luch.inger Empa Swiss Federal Laboratories.for Material Science and Technology Oberlandstrasse 129 8600 Diibendorf Switzerland Plant Biomech.nics Group Faculty of Biology Botanic Garden University of Freiburg Schainzlestrafle 179104 Freiburg Germany

A new self-repairing membrane for inflatable ligh. weigh. structures such.as rubber boats or Tensairity constructions is presented. Inspired by rapid self-sealing processes in plants, a th.n soft cellular polyureth.ne foam coating is applied on th. inside of a fabric substrate, wh.ch.closes th. fissure if th. membrane is punctured with.a spike. Experimental tests are carried out with.a purpose built setup by measuring th. air mass flow th.ough.a leak in a damaged membrane sample. It is sh.wn th.t th. weigh. per unit area of th. self-repairing foam as well as th. curing of th. two component PU-foam under an overpressure influence th. repair efficiency. Curing th. foam under overpressure affects th. relative density as well as th. microstructure of th. foam coatings. Maximal median repair efficiencies of 0.999 h.ve been obtained with.0.16 *** 2 foam cured at 1 bar overpressure. Th.se results suggest th.t th. bio-inspired tech.ique h.s th. potential to extend th. functional integrity of injured inflatable structures dramatically.

关键词： self-repair self-h.aling biomimetics inflatable structures puncture resistance PU foam coating

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

Detecting Android Malware Using Clone Detection

引用

Journal of Computer Science & Tech.ology 2015年第5期30卷 942-956页

作者：陈健 Manar h. Alalfi thomas R. Dean 邹颖 Department of Electrical and Computer Engineering Queen's University Kingston KTL 3N6 Canada Sch.ol of Computing Queen's University Kingston KTL 3N6 Canada

Android is currently one of th. most popular smartph.ne operating systems. h.wever, Android h.s th. largest sh.re of global mobile malware and significant public attention h.s been brough. to th. security issues of Android. In th.s paper, we investigate th. use of a clone detector to identify known Android malware. We collect a set of Android applications known to contain malware and a set of benign applications. We extract th. Java source code from th. binary code of th. applications and use NiCad, a near-miss clone detector, to find th. classes of clones in a small subset of th. malicious applications. We th.n use th.se clone classes as a signature to find similar source files in th. rest of th. malicious applications. Th. benign collection is used as a control group. In our evaluation, we successfully decompile more th.n 1 000 malicious apps in 19 malware families. Our results sh.w th.t using a small portion of malicious applications as a training set can detect 95% of previously known malware with.very low false positives and h.gh.accuracy at 96.88%. Our meth.d can effectively and reliably pint）oint malicious applications th.t belon~ to certain ma｜w^ro ***~

关键词： Android malware clone detection

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

Drosoph.la, destroying angels, and death.aps! Oh.my! A review of mycotoxin tolerance in th. genus Drosoph.la

引用

Frontiers in Biology 2018年第2期13卷 91-102页

作者： Clare h. Scott Ch.alvo thomas Werner Department of Biologtcal Sciences University of Alabama Tuscaloosa Alabama USA Department of Biological Sciences Michigan Technological University Houghton Michigan USA

BACKGROUND： Evolutionary novelties, be th.y morph.logical or bioch.mical, fascinate both.scientists and non-scientists alike. Th.se types of adaptations can significantly impact th. biodiversity of th. organisms in wh.ch.th.y occur. Wh.le much.work h.s been invested in th. evolution of novel morph.logical traits, substantially less is known about th. evolution of bioch.mical adaptations. METh.DS： In th.s review, we present th. results of literature search.s relating to one such.bioch.mical adaptation： α- amanitin tolerance/resistance in th. genus Drosoph.la. RESULTS： Amatoxins, including α-amanitin, are one of several toxin classes found in Amanita mush.ooms. Th.y act by binding to RNA polymerase Ⅱ and inh.biting RNA transcription. Alth.ugh.th.se toxins are leth.l to most eukaryotic organisms, 17 mush.oom-feeding Drosoph.la species are tolerant of natural concentrations of amatoxins and can develop in toxic mush.ooms. Th. use of toxic mush.ooms allows th.se species to avoid infection by parasitic nematodes and lowers competition. Th.ir amatoxin tolerance is not due to mutations th.t would inh.bit α-amanitin from binding to RNA polymerase Ⅱ. Furth.rmore, th. mush.oom-feeding flies are able to detoxify th. oth.r toxin classes th.t occur in th.ir mush.oom h.sts. In addition, resistance h.s evolved independently in several D. melanogaster strains. Only one of th. strains exh.bits resistance due to mutations in th. target of th. toxin. CONCLUSIONS： Given our current understanding of th. evolutionary relationsh.ps among th. mush.oom-feeding flies, it appears th.t amatoxin tolerance evolved multiple times. Furth.rmore, independent lines of evidence suggest th.t multiple mech.nisms confer α-amanitin tolerance/resistance in Drosoph.la.

关键词： Drosoph.la mush.oom-feeding bioch.mical adaptations mush.oom toxins cyclopeptides α-amanitin

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

FLOW STRESS MODEL FOR h.RD MACh.NING OF AISI h.3 WORK TOOL STEEL

引用

Acta Metallurgica Sinica(English.Letters) 2005年第6期18卷 741-748页

作者： h. Yan J. h.a R. Sh.vpuri Sch.ol of Mech.nical-Electrical Engineering Nanchang University Nanchang 330029China Th. Oh.o State University Columbus OH 43210 USA

An approach.is presented to ch.racterize th. stress response of workpiece in h.rd mach.ning, accounted for th. effect of th. initial workpiece h.rdness, temperature, strain and strain rate on flow stress. AISI h.3 work tool steel was ch.sen to verify th.s meth.dology. Th. proposed flow stress model demonstrates a good agreement with.data collected from publish.d experiments. Th.refore, th. proposed model can be used to predict th. corresponding flow stress-strain response of AISI h.3 work tool steel with.variation of th. initial workpiece h.rdness in h.rd mach.ning.

关键词： flow stress model h.rd mach.ning AISI h.3 work tool steel

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

Dynamic stress concentration in an infinitely long cylindrical cavity due to a point sph.rical source embedded with.n a fluid-saturated poroelastic formation of infinite extent

引用

Applied Math.matics and Mech.nics(English.Edition) 2025年第1期46卷 139-156页

作者： h.h.SSEINI O.BALILASh.KI Department of Mech.nical Engineering Faculty of EngineeringGolestan University

Th. effects of a h.rmonically exciting monopole source on an infinitely long cylindrical cavity embedded entirely with.n a fluid-saturated poroelastic formation of infinite extent are examined th.oretically. It is assumed th.t th. source is located outside th. cavity at a specified distance from th. boreh.le axis. Th. magnitudes of th. h.op and radial stresses beside th. pore pressures exerted on th. interface and inside th. porous medium surrounding th. boreh.le are calculated and discussed. Biot's poroelastic modeling along with.th.ee types of boundary conditions for th. cylindrical interface including th. ideal fluid, empty boreh.le, and rigid inclusion with.a h.rd boundary is employed for th. analysis. Utilizing a proper translational addition th.orem for expressing th. incident sph.rical wave in terms of cylindrical wave expansions, th. proposed boundary conditions at th. interface are satisfied. Stresses are formulated by means of wave potential functions in a th.ee-dimensional(3D) manner. Th. effects of th. frequency and th. radial distance between th. source and boreh.le on th. induced stresses are examined for th. first cylindrical modes over frequency spectra. Two permeability conditions for th. interface and th.ee types of soils for th. porous formation are considered th.ough.ut th. analysis. To give an overall outline of th. study, a numerical example is presented. Th. results clearly indicate th.t th. distance is a key parameter and h.s considerable effects on th. induced stress values. In addition, th. interface permeability condition and soil ch.racteristics play an important role in determining th. dynamic response of th. boreh.le. Finally,th. obtained results are compared with.th. relevant analyses existing in th. literature for some limit cases, and good agreement is ach.eved.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neuroinflammation as a th.rapeutic target in h.ntington's disease

引用

Neural Regeneration Research 2025年第3期20卷 817-818页

作者： Andrea Kwakowsky Th.lani h.Palpagama Center for Brain Research.and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Ph.rmacology and Th.rapeutics School of MedicineGalway Neuroscience CentreUniversity of GalwayGalwayIreland

In 1872, George h.ntington presented h.s essay “On Ch.rea” to th. Meigs and Mason Academy of Medicine and, in doing so, detailed a disease th.t would later bear h.s name. h.ntington's disease(h.) is a genetic, neurodegenerative disease th.t manifests as th. loss of motor control,cognitive impairment,and mood and psych.atric ch.nges in paents.

关键词： h.ntington inflammation Medicine

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

Glial response in th. midcingulate cortex in h.ntington’s disease

引用

Neural Regeneration Research 2025年第1期20卷 207-208页

作者： Th.lani h.Palpagama Andrea Kwakowsky Center for Brain Research.and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Ph.rmacology and Th.rapeutics School of MedicineGalway Neuroscience CenterUniversity of GalwayGalwayIreland

h.ntington’s disease(h.)is a genetic disease ch.racterized by th. progressive degeneration of th. striatum and *** can present with.a variety of symptoms th.t can broadly be classified into motor symptoms,inclusive of ch.reatic movements and rigidity,mood and psych.atric symptoms,such.as depression and apath.,and cognitive symptoms,such.as cognitive *** causal mutation underlying h. results from an expansion of a CAG repeat sequence on th. IT15 gene,resulting in th. formation and accumulation of a mutant h.ntingtin protein.

关键词： h.ntington degeneration cortex

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

Tungsten Promoted Ni/Al_2O_3 Catalysts for Carbon Dioxide Reforming of Meth.ne to Synth.sis Gas

引用

Ch.mical Research.in Ch.nese Universities 2004年第4期20卷 470-477页

作者： thomas Suh.rtanto Andrew P. E. York Malcolm L. h. Green Wolfson Catalysis Centre Inorganic Chemistry Laboratory University of OxfordWolfson Catalysis Centre Inorganic Chemistry Laboratory University of OxfordWolfson Catalysis Centre Inorganic Chemistry Laboratory University of Oxford South Parks Road Oxford OX1 3QR UKSouth Parks Road Oxford OX1 3QR UKSouth Parks Road Oxford OX1 3QR UK

A series of tungsten promoted alumina supported nickel catalysts h.s been prepared for th. carbon dioxide reforming of meth.ne to synth.sis gas. Th. catalysts h.ve been ch.racterized by means of XRD, TEM, and Laser Raman spectroscopy. It is sh.wn th.t th. addition of tungsten to th. nickel catalyst can stabilize th. catalyst and increase th. resistance to carbon deposition. Adding a suitable amount of tungsten can also increase th. catalyst activity to be close to th.t of supported noble metal catalysts. Th. carburisation of th. tungsten modified nickel catalyst decreases th. catalyst activity at lower reaction temperatures(h.s no effect on th. catalyst performance at h.gh.r reaction temperatures. Th. alumina supported nickel catalyst modified by 0.67%(mass fraction) WO_3 h.s th. equivalent equilibrium constant of th. dry reforming reaction to th.t of alumina supported 5%(mass fraction) Ru at 873 K, and also h.s a lower activation energy for dry reforming th.n th. latter.

关键词： Nickel catalyst Tungsten modifier CO_2 reforming Meth.ne Syngas

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

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：