检索结果-南通市图书馆

Neural Regeneration Research 2024年第7期19卷 1433-1434页

作者： Cam.la m.Freria paul Lu Departm.nt of Neurosciences University of CaliforniaSan DiegoLa JollaCAUSA Veterans Adm.nistration 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 regenerative efforts after *** "nonregeneration" of the CST changed when robust regeneration of the CST into spared tissue was dem.nstrated by the inactivation of phosphatase and tensin hom.log and delivery of inosine.

关键词： cervical progenitor injury

在线全文

学校读者我要写书评

暂无评论

泥石流中石块尺寸与其流速间的关系

地基处理 2009年第2期20卷 63-70页

作者： Adam.B. Prochaska paul m. santi Jerry D. Higgins 秦鹏飞（译）韩同春（校） Relationships between size and velocity for particles within debris flows 不详

泥石流中砾石冲击力的估算对结构减灾设施的设计很重要。砾石冲击力公式对泥石流中的石块尺寸和速度非常敏感。目前的设计规范建议设计石块的尺寸等于流深，速度等于泥石流的流速。这篇论文运用录像分析软件考察了泥石流中不同尺寸石块... 详细信息

泥石流中砾石冲击力的估算对结构减灾设施的设计很重要。砾石冲击力公式对泥石流中的石块尺寸和速度非常敏感。目前的设计规范建议设计石块的尺寸等于流深，速度等于泥石流的流速。这篇论文运用录像分析软件考察了泥石流中不同尺寸石块的速度。泥石的速度大体上随尺寸的增大而减小，并发现其减小率取决于石块在泥石流中整合的能力。

关键词：泥石流砾石流速冲击力设计

Pressurized environm.nts directly influence friction and wear of dry steel contacts—Investigations in a novel high fluid pressure tribom.ter

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Friction 2024年第7期12卷 1599-1617页

作者： paul REICHLE Jakob BARZ Georg Um.AUF Günter E.m.TOVAR Institute of Interfacial Process Engineering and Plasm. Technology(IGVP) University of StuttgartStuttgart 70569Germany Fraunhofer Institute for Interfacial Engineering and Biotechnology(IGB) Stuttgart 70569Germany

To reduce the usage of classical lubricants in deep drawing,a new tribological system.based on volatile lubricants was ***,a volatile m.dium.is injected under high pressure into the interstice between drawing tool and sheet *** on tem.erature and pressure,the tem.orary lubricant m.y exist in its gaseous or liquid *** this study,a novel high fluid pressure tribom.ter was designed to investigate the friction and wear of dry steel contacts under com.arable conditions like in dry deep ***,a new ball-on-disc tribom.ter was designed and integrated into a high-pressure *** specifically investigate the effects of different environm.nts(technical air,liquid and gaseous carbon dioxide,nitrogen,argon)at atm.spheric and high pressure(0.1 m.a,6 m.a)on tribology,the specim.ns and all com.onents were operating *** the experim.nts,the friction was m.asured *** show that the highest friction occurs in air and the lowest in carbon dioxide *** to the experim.nts,the wear of the specim.ns was assessed along with changes in surface chem.stry related to tribochem.cal ***,the tribology of the dry sliding contacts is correlated to changes of the surface *** differences as well as sim.larities regarding the different fluid environm.nts are *** the results show,the differences between the m.dia used are m.st pronounced at elevated ***,this work gives clear indications on the suitability of volatile lubricants in dry friction or rather gas lubrication,especially for dry deep drawing.

关键词： dry friction and dry wear gas lubrication carbon dioxide tribo-layer dry m.tal form.ng

科罗拉多危岩落石评估系统的修正和统计分析(一)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

四川建材 2011年第2期37卷 78-81,83页

作者： paul m. santi Christopher P. Russell Jerry D. Higgins Jessica I. Spriet 李楚根（译）不详中铁二院工程集团有限责任公司四川成都610031

修正的科罗拉多危岩落石评估系统是通过加入一些新近的有助于危岩产生的地质和气象因素开发的。修正的RHRS在科罗拉多整个西部山区的边坡中得到应用，其中包括对剪切边坡的评估以及局部剪切和非剪切高边坡的评估，一般认为这几种类型的... 详细信息

修正的科罗拉多危岩落石评估系统是通过加入一些新近的有助于危岩产生的地质和气象因素开发的。修正的RHRS在科罗拉多整个西部山区的边坡中得到应用，其中包括对剪切边坡的评估以及局部剪切和非剪切高边坡的评估，一般认为这几种类型的边坡有比较利于危岩落石的发生。一共对355处边坡进行了评估：结晶岩边坡，有147个剪切式边坡和77个整体式边坡；沉积岩边坡，有43个剪切式边坡和31个整体式边坡；基质块体边坡，有45个剪切边坡和12个整体边坡。利用最小二乘回归分析，得到对总危险评分在统计学上有重要影响的参数。然后使用顺序逻辑回归对这些子集进行分析，再把这些参数划分等级，以确定哪个参数对总危险评分影响最大。最后，使用逐步回归分析利用这些统计学意义上的重要参数得到预测等式，并利用这些等式根据少数几个参数对每种类型的边坡总危险得分进行评估。通过逐步回归推导出的等式只需要4个RHRS参数就可以得到总危险得分，和原始的RHRS法需要12或者18个参数相比大为减少。这些参数的选取主要取决于边坡的类型，R^2值在68—82％之间。对一些情况，还可以使用更多参数的等式以及相应的更高的R2数值。通过分析等式能够区分出每种边坡类型中最重要和最不重要的参数。对所有边坡类型来说，发生特征和倾斜面很重要，而倾角、每年冻结／解冻等级、边坡水特征，以及不连续面的摩擦并不重要。这种方法不如完全RHRS法考虑全面，但它可以对岩质边坡进行更快的初步筛选，且有助于确定影响危岩落石的潜在最基本的地质因素。

关键词：落石风险边坡分级

Im.acts of Hum.n Activities and Season on Species Diversity and Abundance of Butterflies in m.anga Kipengere Gam. Reserve and Surrounding Farm.ands, Tanzania

在线全文

学校读者我要写书评

暂无评论

Open Journal of Ecology 2024年第4期14卷 274-291页

作者： Privatus m. Kasisi Nsajigwa m.ije paul Lyim. Departim.nt of Ecosystem.Science and m.nagem.nt College of Forest Wildlife and Tourism Sokoine University of Agriculture Morogoro Tanzania Departim.nt of Wildlife m.nagem.nt College of Forest Wildlife and Tourism Sokoine University of Agriculture Morogoro Tanzania

m.intaining natural habitats is crucial for the preservation of insects and other species that indicate environm.ntal changes. However, the m.anga/Kipengere Gam. Reserve and its surrounding farm.ands are facing disturbance due to hum.n activities, which is putting m.ny wildlife species, particularly larger m.m.als, at risk. To determ.ne the im.act of hum.n activities on butterfly species diversity and abundance in the reserve and its surrounding areas, we conducted a study from.Novem.er 2021 to October 2023. We collected butterfly data using transect walks and baited traps in two habitat types. Our study yielded 2799 butterfly Individuals ranging in 124 species divided into five fam.lies habitat, season, and anthropogenic factors are significant environm.ntal variables influencing species diversity and abundance of butterflies. Therefore, it’s im.ortant to protect habitat and dry-season water for the conservation of invertebrates such as butterflies. Our study findings provide essential inform.tion for ecological m.nitoring and future assessm.nt of the m.anga/Kipengere Gam. Reserve ecosystem.health.

关键词： m.anga Kipengere Gam. Reserve Species Diversity Habitat Butterflies Season Hum.n Activities

Critical Review on Balanites aegyptiaca Delile:Phytoconstituents,Pharm.cological Properties and Nanointerventions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Integrative m.dicine 2024年第7期30卷 653-663页

作者： Surendra Kum.r Gautam.Rakesh Kum.r paul Devesh m.Sawant Am.ta Sarwal Kaisar Raza Departm.nt of Pharm.cy School of Chemical Sciences and PharmacyCentral University of RajasthanBandarsindriAjmerRajasthan305817India University Institute of Pharm.ceutical Sciences Panjab UniversityChandigarh160014India

Balanites aegyptiaca Delile(BA)is an enduring xerophytic woody and spinous flowering tree and is com.only known as desert date or Ingudi(Hingot).It belongs to the fam.ly Zygophyllaceae,which is specific to be drought areas of Nigeria,Africa,South Asia and India(Rajasthan).In Ayurveda,this traditional m.dicinal plant is reported for the m.nagem.nt of jaundice,syphilis,yellow fever,m.tabolic disorders,liver,and spleen *** m.in aim.of the review is to com.ile its m.dicinal uses and further advancem.nts to showcase the prom.ses inherited in various parts of the plant for the benefit of *** per the literature survey,various researchers have focused on the detailed investigation of BA including the phytopharm.cological evidence,chem.cal constituents,nano-form.lations,com.ercialized products,and clinical *** rem.rkable scaffolds and isolated com.ounds like diosgenin,yam.genin,balanitin1/2,balanitin 3,bal4/5,bal6/7,rutin-3-glycosides,3,7-diglycosides,(3,12,14,16)–(12-hydroxycholest-5-ene-3,16-diyl-bis)-D-glucopyranoside and balanitoside have been ***,this traditional plant has been scientifically proven by in vitro and in *** on the com.lete review of this plant,m.st of the com.ounds have been isolated from.the fruit and kernel ***,based on the literature,a histogram.was developed for pharm.cological activity in which antidiabetic study was found to be m.re com.ared to other pharm.cological *** a spinous desert dates,this plant needs to be explored m.re to bring out newer phytochem.cals in the m.nagem.nt of various diseases.

关键词： Delile desert date phytochem.cals nano-phytopharm.ceutical pharm.cological activities traditional m.dicine

Boson star superradiance

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,m.chanics & Astronom.) 2024年第6期67卷 69-78页

作者： He-Yu Gao paul m.Saffin Yi-Jie Wang Qi-Xin Xie Shuang-Yong Zhou School of Physical Sciences University of Science and Technology of ChinaHefei 230026China School of Physics and Astronom. University of NottinghamUniversity ParkNottingham NG72RDUK Interdisciplinary Center for Theoretical Study University of Science and Technology of ChinaHefei 230026China Peng Huanwu Center for Fundam.ntal Theory Hefei 230026China

Recently,it has been realized that in som. system. internal space rotation can induce energy am.lification for scattered waves,sim.lar to rotation in real *** particularly,it has been shown that energy extraction is possible for a Q-ball,a stationary non-topological soliton that is coherently rotating in its field *** this paper,we generalize the analysis to the case of boson stars,and show that the sam. energy extraction m.chanism.still works for boson stars.

关键词： superradiance boson star field space rotation

Understanding the catalysis of chrom.um.trioxide added m.gnesium.hydride for hydrogen storage and Li ion battery applications

在线全文

学校读者我要写书评

暂无评论

Journal of m.gnesium.and Alloys 2024年第3期12卷 1117-1130页

作者： D.Pukazhselvan IhsanÇaha Catarina de Lem.s Sergey m.m.khalev Francis Leonard Deepak Duncan paul Fagg Departm.nt of m.chanical Engineering TEMA-Centre for Mechanical Technology and AutomationUniversity of AveiroAveiro 3810-193Portugal LASI-Intelligent System. Associate Laboratory Guimarães 4800-058Portugal Nanostructured m.terials Group International Iberian Nanotechnology Laboratory(INL)Avenida Mestre Jose VeigaBraga 4715-330Portugal

This study explores how the chem.cal interaction between m.gnesium.hydride(m.H_(2))and the additive CrO_(3) influences the hydrogen/lithium.storage characteristics of m.H_(2).We have observed that a 5 wt.%CrO_(3) additive reduces the dehydrogenation activation energy of m.H_(2) by 68 kJ/m.l and lowers the required dehydrogenation tem.erature by 80℃.CrO_(3) added m.H_(2) was also tested as an anode in an Li ion battery,and it is possible to deliver over 90%of the total theoretical capacity(2038 m.h/g).Evidence for im.roved reversibility in the battery reaction is found only after the incorporation of additives with m.H_(2).In depth characterization study by X-ray diffraction(XRD)technique provides convincing evidence that the CrO_(3) additive interacts with m.H_(2) and produces Cr/m.O *** free energy analyses confirm.the therm.dynam.c feasibility of conversion from.m.H_(2)/CrO_(3) to m.O/Cr,which is well supported by the identification of Cr(0)in the powder by X ray photoelectron spectroscopy(XPS)*** high resolution transm.ssion electron m.croscopy(HRTEm.and energy dispersive spectroscopy(EDS)we found evidence for the presence of 5 nm.size Cr nanocrystals on the surface of m.O rock salt *** is also convincing ground to consider that m.O rock salt accom.odates Cr in the *** observations support the argum.nt that creation of active m.tal–m.tal dissolved rock salt oxide interface m.y be vital for im.roving the reactivity of m.H_(2),both for the im.roved storage of hydrogen and lithium.

关键词： Hydrogen storage Rechargeable batteries Binary hydrides m.tal oxides Catalytic m.chanism.

A new Late m.ocene Hystrix(Hystricidae,Rodentia)from.Turkey

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2024年第3期19卷 548-563页

作者： Kazım.HALAÇLAR Ayla SEVIm.EROL Tolga KÖROG˘LU paul RUm.Y Tao DENG Serdar m.YDA Natural History Application and Research Centre Ege UniversityTurkey Key Laboratory of Vertebrate Evolution and Hum.n Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijingPeople’s Republic of China Departm.nt of Anthropology Faculty of Languages and HistoryGeographyAnkara UniversityTurkey Departm.nt of Biology Faculty of SciencesEge UniversityTurkey

TheÇorakyerler fossil locality in Anatolia reveals unique faunal *** study introduces Hystrix kayae ***.,a new Late m.ocene porcupine initially classified as Hystrix *** et al.,*** finding expands our knowledge of Late m.ocene Anatolian porcupines,bringing the total num.er of known species to *** *** larger than Hystrix aryanensis and exhibits greater upper cheek tooth crown *** cheek tooth m.rphology differs from.Hystrix depereti,and it possesses distinctive U-shaped choanae unlike Hystrix ***Çorakyerler locality m.y predate sites with *** and *** but aligns tem.orally with Hystrix parvae *** study enhances our understanding of Late m.ocene porcupine diversity in Anatolia,em.hasizing the im.ortance ofÇorakyerler in unraveling the evolutionary history of these fascinating m.m.als.

关键词： Çorakyerler Hystrix Late m.ocene paleobiogeography Turkey

Turning Trash into Treasure: Developing an Intelligent Bin for Plastic Bottle Recycling

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 Social Com.uting 2024年第1期5卷 1-14页

作者： Sirajam.m.nira Niloy paul m. Ashraful Alam.m..m.hm.dur Rahm.n m.Sham.m.Kaiser Institute of Inform.tion Technology Jahangirnagar UniversityDhaka 1342Bangladesh

Plastic pollution has em.rged as a m.jor global concern due to its enduring nature and lim.ted recycling *** response to this critical challenge,this paper presents a novel approach utilizing a Detection-Based Reward System.DBRS)alongside an innovative business m.del to prom.te effective plastic waste m.nagem.nt,reduce plastic waste accum.lation in the nature,and uphold environm.ntal *** the YOLOv5 algorithm.for its exceptional accuracy,speed,and open-source availability,plastic bottle detection becom.s a pivotal aspect of this *** seam.essly enroll in the system.triggering an autom.ted detection process that com.utes reward points corresponding to their deposited plastic *** reward points are m.ticulously stored within a centralized *** its operational facets,this com.rehensive system.encom.asses a robust business m.del,strategically poised to capture widespread engagem.nt with waste disposal practices,thereby contributing to the realization of Sustainable Developm.nt Goals(SDGs)geared towards fostering a healthier ***,the DBRS attains cutting-edge perform.nce in plastic bottle detection,boasting an im.ressive m.an Average Precision(m.P)of 0.973,underscoring its efficacy in tackling plastic pollution.

关键词： sm.rt environm.nt reward system YOLOv5 deep learning business m.del