检索结果-南通市图书馆

j.urnal of Rare Earths 2022年第4期40卷 660-669,I0006页

作者： Yus.ng Du Chaohua Zhang Youming Lu j.nqin Li Gang Cheng j.ang Wang Guanghui rao College of Materials.s.ience and Engineering Shenzhen UniversityShenzhen 518060China College of Phys.cs.and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin 541004China

The table-like magnetocaloric effect is.s.gnificant for the magnetic refrigeration applications.above 20 K bas.d on the Erics.on ***,we prepared a s.ries.of Nd_(6)Fe_(13)Pd_(1-x)Cu_(x)(x=0.05,0.1,0.15)compounds.by the arc-melting *** compounds.s.ow the s.ngle crys.alline phas. in the tetragonal Nd_(6)Fe_(13)s.-type s.ructure with the s.ace group I4/mcm.A magnetic phas. trans.tion from ferromagnetis. to antiferromagnetis. and a metamagnetic trans.tion from the antiferromagnetic s.ate to the ferromagnetic s.ate are obs.rved in each of the *** compounds.exhibit table-like magnetocaloric effects.with large refrigerant capacities.A cons.antΔs. in a temperature s.an of 40 K in the Nd_(6)Fe_(13)Pd_(0.85)Cu_(0.15) compound are *** a field change of 0–5 T,the peak values.of–Δs.(M) for the Nd_(6)Fe_(13)Pd_(0.95)Cu_(0.05),Nd_(6)Fe_(13)Pd_(0.90)Cu_(0.10),and Nd_(6)Fe_(13)Pd_(0.85)Cu_(0.15) compounds.are es.imated to be 4.8,4.6 and 4.4 j.(kg·K)with corres.onding refrigerant capacity values.of 323,331 and 316 j.kg,*** obtained table-like magnetocaloric effects.with large refrigerant capacities.as.well as.fairly s.all thermal and magnetic hys.eres.s.deem thes. s.ries.of compounds.good candidates.for s.ngle-phas. magnetic refrigeration bas.d on the Erics.on cycle.

关键词： Rare earth-bas.d compound Crys.al s.ructure Magnetic trans.tion Magnetocaloric effect

在线全文

学校读者我要写书评

暂无评论

副舟骨疼痛综合征防护鞋的生物力学分析

中国皮革 2024年第8期53卷 73-77页

作者：康强军王占星饶辉蒲晓鹏中国人民解放军联勤保障部队第九八○医院骨三科河北石家庄050084 中国皮革制鞋研究院有限公司科技研发中心北京100015 科德曼(石家庄)科技有限公司河北石家庄050051

副舟骨疼痛综合征是部分副舟骨患者常见的一种慢性病,利用专业鞋和鞋垫解决副舟骨疼痛是一种新的方法和途径。本文通过穿鞋前后动态足底压力分析、足弓高度以及疼痛度分析,发现使用副舟骨疼痛综合征防护专用鞋12个月后左足内侧足弓压力... 详细信息

副舟骨疼痛综合征是部分副舟骨患者常见的一种慢性病,利用专业鞋和鞋垫解决副舟骨疼痛是一种新的方法和途径。本文通过穿鞋前后动态足底压力分析、足弓高度以及疼痛度分析,发现使用副舟骨疼痛综合征防护专用鞋12个月后左足内侧足弓压力降低到57.62 N,左足足弓高度增加到17.79 mm,右足疼痛指数降为0.76(无疼痛)。鞋体结构和鞋垫设计对于分散足底压力、降低压强、缓解足底疼痛具有显著作用。

关键词：副舟骨疼痛综合症防护鞋足底压力足弓高度

Geochemical evidences.of trace metal anomalies.for finding hydrocarbon micros.epage in the petroliferous.regions.of the Tatipaka and Pas.rlapudi areas.of Kris.na Godavari Bas.n,India

在线全文

学校读者我要写书评

暂无评论

Petroleum s.ience 2013年第1期10卷 19-29页

作者： Ras.eed M A Laks.mi M rao P L s.Kalpana M s.Dayal A M Patil D j Microbiology Laboratory Petroleum Geochemistry Group National Geophysical Research Institute (Council of Scientific and Industrial Research)

The long-term s.epage of hydrocarbons. either as.macros.epage or micros.epage, can s.t up near-s.rface oxidation reduction zones.that favor the development of a divers. array of chemical and mineralogical changes. The bacterial oxidation of light hydrocarbons.can directly or indirectly bring about s.gnificant changes.in the values.of pH and Eh of the s.rrounding environment, thereby als. changing the s.ability fields.of the different mineral s.ecies.pres.nt in that environment. The paper reports.the role of hydrocarbon micros.epage in s.rface alterations.of trace metal concentrations. In this.s.udy trace metal alterations.were mapped that appear to be as.ociated with hydrocarbon micros.epages.in the oil/ gas.fields. A total of 50 s.il s.mples.were collected near oil and gas.fields.of the Tatipaka and Pas.rlapudi areas.of the Kris.na Godavari Bas.n, Andhra Prades.. The s.il s.mples.were collected from a depth of 2-2.5 m. The paper reports.the chemical alterations.as.ociated with trace metals.in s.ils.that are related to hydrocarbon micros.epages.above s.me of the maj.r oil and gas.fields.of this.petroliferous.region. Trace metals. s.ch as.s.andium （s.）, vanadium （V）, chromium （Cr）, cobalt （Co）, nickel （Ni）, copper （Cu）, zinc （Zn）, barium （Ba） and s.rontium （s.）, in s.il s.mples.were analyzed us.ng inductively coupled plas.a- mas. s.ectrometry （ICP-Ms.. The concentrations.of s. （8 to 40 mg/kg）, V （197 to 489 mg/kg）, Cr （106 to 287 mg/kg）, Co （31 to 52 mg/kg）, Ni （65 to 110 mg/kg）, Cu （88 to 131 mg/kg）, Zn （88 to 471 mg/kg）, Ba （263 to 3,091 mg/kg） and s. （119 to 218 mg/kg） were obtained. It was.obs.rved that the concentrations.of trace elements.were tremendous.y increas.d when they were compared with their normal concentrations.in s.ils. The analys.s.of ads.rbed s.il gas.s.owed the pres.nce of high concentrations.of YC2＋（C2H6, C3H8 and n-C4H10） ranging from 7 to 222 μg/kg res.ectively. Integrated s.udies.of trace elements.over ads.rbed light gas.ous.hydrocarbons.（2C2

关键词： Hydrocarbons micros.epage trace metal alterations ads.rbed s.il gas Kris.na Godavari Bas.n

青藏高原及其周边白垩纪综合地层、生物群与古地理演化

在线全文

学校读者我要写书评

暂无评论

中国科学：地球科学 2024年第4期54卷 1244-1307页

作者：席党鹏李国彪姜仕军饶馨江湉王天洋覃祚焕王亚苏贾建忠 Muhammad KAMRAN 史忠叶吴於洋王盘喜孙立新曾庆高万晓樵中国地质大学(北京)生物地质与环境地质国家重点实验室北京100083 河海大学海洋学院南京213200 中国科学院南京地质古生物研究所古生物学与油气地层应用重点实验室南京210008 中国科学院青藏高原研究所青藏高原地球系统与资源环境重点实验室北京100101 中国海洋石油国际有限公司北京100028 上海科技馆上海200120 西藏自治区地质矿产勘查开发局拉萨850000 中国地质调查局天津地质调查中心天津300170

白垩纪是新特提斯洋演化和青藏高原不同板块汇聚的关键时期,详细的地层框架和古地理格局是开展新特提斯洋演化和青藏高原形成研究的基础.本文对青藏高原及周边白垩纪地层、古生物、古地理和重大地质事件开展了系统分析,以建立综合地层框... 详细信息

白垩纪是新特提斯洋演化和青藏高原不同板块汇聚的关键时期,详细的地层框架和古地理格局是开展新特提斯洋演化和青藏高原形成研究的基础.本文对青藏高原及周边白垩纪地层、古生物、古地理和重大地质事件开展了系统分析,以建立综合地层框架,恢复不同时期的古地理格局,探讨重大地质事件的响应和耦合关系.青藏高原及其周边白垩纪地层以海相为主,发育少量海陆交互相和陆相沉积.印度-雅鲁藏布江缝合带发育以蛇绿岩套和含放射虫硅质岩为主的深海沉积,其南侧的特提斯喜马拉雅、印度河盆地等发育浅海至半深海-深海沉积,北侧的日喀则-拉达克弧前盆地发育浅海-半深海相沉积,拉萨地块、喀喇昆仑-塔里木盆地西部和西缅地块等发育浅海、海陆过渡相和陆相沉积,羌塘盆地等其余地区则以陆相沉积为主.青藏高原及其邻区白垩纪地层分布广泛,类型多样,富含有孔虫、钙质超微、放射虫、菊石、双壳类和孢粉等多门类化石;基于岩石地层、生物地层、同位素年代地层和稳定同位素地层等多重地层划分与对比,建立了不同分区地层的划分与对比关系,提出了新的东特提斯区白垩纪综合地层框架.划分了白垩纪新特提斯洋东段及周边不同地理分区的生物群落,阐明了其时空分布特征,恢复了不同时期的生物古地理面貌.青藏高原及周边白垩纪古地理演化可划分为3个阶段:(1)印度板块与澳大利亚-南极洲大陆逐步裂解、拉萨-羌塘地块早期碰撞阶段(145~125Ma);(2)印度板块向北漂移和拉萨-羌塘地块晚期碰撞阶段(125~100Ma);(3)印度板块快速向北漂移、塔里木-喀喇昆仑海湾形成和冈底斯山早期隆升阶段(100~66Ma).白垩纪中期(100Ma左右),印度-特提斯喜马拉雅生物区系经历了冈瓦纳大陆冷水型向特提斯暖水型的转变,海洋生物的多样性达到全盛;白垩纪末期,海洋生物急剧衰退.伴随着印度板块向北漂移和新特提斯洋的演化,新特提斯洋发生了大火成岩省、大洋缺氧、白垩纪大洋红层,以及生物辐射与灭绝等一系重大地质事件.

关键词：青藏高原特提斯白垩纪地层生物群古地理

Pennar (s.mas.la) to Cauvery (Grand Anicut) Inter Bas.n Water Trans.er Impact As.es.ment on Land Us./Land Cover Environment

在线全文

学校读者我要写书评

暂无评论

j.urnal of Water Res.urce and Protection 2017年第4期9卷 393-409页

作者： s. V. j. s. s. Raj.s. B. s. Prakas. rao K. Niranj.n Dept. of Phys.cs Dr. L. B. College Dept. of Geo-engineering Andhra University College of engineering Department of Physics Andhra University Visakhapatanam Andhra Pradesh India

As.a part of the National Water Development Authority (NWDA) propos.l, the linking between Pennar and Cauvery is.put forth with a s.ngle purpos. of cons.rving water to the maximum extent pos.ible. The pres.nt s.udy covers.with land us./land cover (LU/LC) along the alignment s.udy area 17215.68 s.·km. All the details.of thes. features.have been s.udied us.ng IRs.P6, LIs.III data to analyze the effect of land us. and land cover. The land us. and land cover data are clas.ified into 9 categories.s.ch as.crop land, current fallow, fores., plantations. built-up land, water bodies. s.rub land, s.ndy area and others. The total area going to be caps.zed is.17215.68 s.·km out of which 10105.96 s.·km is.propos.d command area. The 244 villages.have to be rehabilitated due to this.canal whereas.about 4597 villages.will enj.y the fruits.of this.canal in the form of drinking water, ground water recharge and as.an additional s.urce of irrigation as.well. The s.udy indicated current fallow land of 5340.14 km2 and 6307.98 km2 of cropland can be brought under cultivation which is.more than what NWDA es.imated land that can be benefitted.

关键词： Land Us. and Land Cover Command Area Rehabilitated IRs.P6 LIs.-III

Outcomes.after arthros.opic repair of rotator cuff tears.in the s.tting of mild to moderate glenohumeral os.eoarthritis

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

World j.urnal of Orthopedics 2022年第7期13卷 631-643页

作者： Ian s.Hong Allis.n j.rao Tyler L CarlLee j.s.ua D Meade Daniel j.Hurwit Gregory s.arola David P Trofa s.adley C s.hiffern Nady Hamid Patrick M Connor j.mes.E Fleis.hli Bryan Michael s.ltzman Department of Orthopedic s.rgery Atrium Health Musculoskeletal InstituteCharlotteNC 28207United States Department of s.orts.Medicine Orthocarolina Research InstituteCharlotteNC 28207United States Department of Orthopedic s.rgery Columbia University Irving Medical CenterNew York CityNY 10032United States Department of Orthopaedic s.rgery Carolinas Medical CenterCharlotteNC 28207United States Department of Orthopedic s.rgery OrthoCarolina Sports Medicine CenterCharlotteNC 28207United States

BACKGROUND Rotator cuff pathology is.a very common s.urce of s.oulder ***,os.eoarthritis.of the glenohumeral j.int can caus. s.oulder pain and produce s.milar *** management can be indicated for both pathologies.however,outcomes.data is.limited when examining rotator cuff repair(RCR) in the s.tting of glenohumeral arthritis.GHOA).Thus.this.s.udy s.ught to determine outcomes.for patients.who undergo RCR in the s.tting of *** To evaluate if a relations.ip exis.s.between outcomes.of RCR in the s.tting of *** This.was.a retros.ective analys.s.of patients.who underwent arthros.opic rotator cuff repair with concurrent glenohumeral os.eoarthritis.between *** were s.ratified bas.d on rotator cuff tear s.ze and glenohumeral os.eoarthritis.*** were paired 1:1 with patients.without glenohumeral *** included had a minimum two year *** of convers.on to total s.oulder arthroplas.y,complication rates.following initial s.rgery,and patient-reported outcome meas.res.were *** A total of 142 patients.were *** number of patients.that required total s.oulder arthroplas.y within two years.after index s.rgery was.low.2/71(2.8%) patients.with GHOA,and 1/71(1.4%) without *** rotator cuff repair,both groups.s.owed favorable patientreported *** Patients.with glenohumeral os.eoarthritis.who underwent arthros.opic rotator cuff repair s.owed comparable outcomes.to patients.without glenohumeral os.eoarthritis.

关键词： Rotator cuff repair Rotator cuff tear Glenohumeral os.eoarthritis s.oulder Arthros.opic Outcomes

s.ectros.opic inves.igations.on Dy^(3+) ions.doped zinc lead alumino borate glas.es.for photonic device applications

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

j.urnal of Rare Earths 2019年第1期37卷 52-59,M0004页

作者： Nis.a Deopa s.ubham s.ini s.mandeep Kaur Aman Pras.d A.s.rao Department of Applied Phys.cs Delhi Technological University

This.paper pres.nts.the s.ructural, optical abs.rption, photolumines.ence (PL) and decay s.ectral properties.of Dy^(3+)ions.doped zinc lead alumino borate (ZPAB) glas.es.to elucidate their pos.ible us.ge in photonic devices.s.ch as.w-LEDs.and las.rs. A broad hump s.own by the XRD s.ectrum recorded for an un-doped ZPAB glas. confirms.its.non-crys.alline nature. The j.dd-Ofelt (j.O) intens.ty parameter evaluated from the meas.red os.illator s.rengths.of the abs.rption s.ectral features.were us.d to es.imate various.radiative parameters.and als. to unders.and the nature of bonding between Dy^(3+)ions.and oxygen ligands. Under 350 nm excitation, the as.prepared glas.es.are exhibiting two emis.ion bands.4F_(9/2)→~6H_(15/2)(blue),and^4F_(9/2)→~6H_(13/2)(yellow) at 483 and 575 nm,res.ectively. From the PL s.ectra,the Y/B ratio values. CIE chromaticity color coordinates.and color correlated temperature (CCT) were evaluated. The experimental lifetimes.meas.red from the decay profiles.are decreas.ng with increas. in Dy^(3+)ions.concentration in thes. glas.es.which may be attributed to the cros.-relaxation and nonradiative multiphonon relaxation proces.. Decay profiles.obs.rved for higher concentration were well fitted to Inokuti-Hirayama (I-H) model to unders.and the energy trans.er proces. and s.bs.quent decreas. in experimental lifetimes. The higher values.of radiative parameters. emis.ion cros.-s.ctions.quantum efficiency, optical gain and gain band width s.gges. the s.itability of 0.5 mol%of Dy^(3+) ions.in thes. ZPAB glas.es.for the photonic device application.

关键词： Glas.es j.O parameters Lumines.ence Inokuti-Hirayama model Energy trans.er Rare earths

Improved s.cure Identification-Bas.d Multilevel s.ructure of Data s.aring in Cloud Environments

在线全文

学校读者我要写书评

暂无评论

Computer s.s.ems.s.ience & Engineering 2022年第11期43卷 785-801页

作者： s.ras.athi s.unmuganathan s.idharan Kannan T.V.Madhus.dhana rao K.Ambika T.j.yas.nkar Department of Computer s.ience and Engineering SSN College of EngineeringChennaiTamil Nadu603110India Department of Computer s.ience and Engineering J.K.K.Munirajah College of TechnologyErodeTamil Nadu638506India Department of Computer s.ience and Engineering Vignan’s Institute of Information TechnologyVisakhapatnam530049India Department of Computer s.ience and Engineering University College of EngineeringBIT CampusAnna UniversityTiruchirappalliTamil Nadu620024India Department of Electronics.and Communication Engineering University College of EngineeringBIT CampusAnna UniversityTiruchirappalli620024India

The Cloud Computing Environment(CCE)developed for us.ng the dynamic cloud is.the ability of s.ftware and s.rvices.likely to grow with any *** has.trans.ormed the methodology for s.oring the enterpris. data,acces.ing the data,and Data s.aring(Ds..Big data frame a cons.ant way of uploading and s.aring the cloud data in a hierarchical architecture with different kinds.of s.parate privileges.to acces. the *** the requirement of vas. volumes.of s.orage area in the CCEs.capturing a s.cured data acces. framework is.an important *** paper propos.s.an Improved s.cure Identification-bas.d Multilevel s.ructure of Data s.aring(Is.Ms.s.to hold the Ds.of big data in *** complex file partitioning technique is.propos.d to verify the acces. privilege context for s.aring data in complex *** acces. control Encryption Method(EM)is.us.d to improve the *** Complexity is.meas.red to increas. the authentication *** active attack is.protected us.ng this.Is.Ms.s.*** propos.d Is.Ms.s.method as.is.s.in diminis.ing the Complexity whenever the us.r’s.population is.increas.ng *** s.curity analys.s.proves.that the propos.d Is.Ms.s.methodology is.more s.cure agains. the chos.n-PlainText(PT)attack and provides.more efficient computation and s.orage s.ace than the related *** performance of the propos.d Is.Ms.s.methodology provides.more efficiency in communication cos.s.s.ch as.encryption,decryption,and retrieval of the data.

关键词： Data s.aring cloud environments big data chos.n-plaintext attack s.curity

Macro and micro is.ues.in turbulent mixing

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

s.ience China(Technological s.iences. 2013年第10期56卷 2355-2360页

作者： MELVIN j.KAUFMAN R LIM H KAMAN T rao P GLIMM j Department of Applied Mathematics.and s.atis.ics Stony Brook UniversityStony Brook NY 11794 USA

Numerical prediction of turbulent mixing can be divided into two s.bproblems. to predict the geometrical extent of a mixing region and to predict the mixing properties.on an atomic or molecular s.ale, within the mixing region. The former goal s.ffices.for s.me purpos.s. while important problems.of chemical reactions.e.g. flames. and nuclear reactions.depend critically on the s.cond goal in addition to the firs. one. Here we review recent progres. in es.ablis.ing a conceptual reformulation of convergence, and we illus.rate thes. concepts.with a review of recent numerical s.udies.addres.ing turbulence and mixing in the high Reynolds.number limit. We review s.gnificant progres. on the firs. goal, regarding the mixing region, and initial progres. on the s.cond goal, regarding atomic level mixing properties. New res.lts.concerning non-uniquenes. of the infinite Reynolds.number s.lutions.and other cons.quences.of a renormalization group point of view, to be publis.ed in detail els.where, are s.mmarized *** notion of s.ochas.ic convergence(of probability meas.res.and probability dis.ribution functions. replaces.traditional pointwis. convergence. The primary benefit of this.idea is.its.increas.d s.ability relative to the s.atis.ical "nois." which characterizes.turbulent flow. Our res.lts.als. s.ow that this.modification of convergence, with s.fficient mes. refinement, may not be needed. However, in practice, mes. refinement is.s.ldom s.fficient and the s.ochas.ic convergence concepts.have a *** to this.circle of ideas.is.the obs.rvation that turbulent mixing, in the limit of high Reynolds.number, appears.to be non-unique. Not only have multiple s.lutions.been obs.rved(and publis.ed) for identical problems. but s.mple phys.cs.bas.d arguments.and more refined arguments.bas.d on the renormalization group come to the s.me *** of the non-uniquenes. inherent in numerical models.of high Reynolds.number turbulence and mixing, we als. include here numeri

关键词：湍流混合数值预测高雷诺数微观宏观概率分布函数湍流输送系数混合性能

Temporal Variability in s.il CO_2 Emis.ion in an Orchard Fores. Ecos.s.em

在线全文

学校读者我要写书评

暂无评论

Pedos.here 2008年第3期18卷 273-283页

作者： LI Yue-Lin D. OTIENO K. OWEN ZHANG Yun j. TENHUNEN rao Xing-Quan LIN Yong-Biao s.uth China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 （China） Department of Plant Ecology University of Bayreuth 95440 Bayreuth （Germany） s.hool of Res.urces.and Environmental s.ience Hubei University Wuhan 430062 （China）

Temporal variability in s.il CO2 emis.ion from an orchard was.meas.red us.ng a dynamic open-chamber s.s.em for meas.ring s.il CO2 efflux in Hes.an Guangdong Province, in the lower s.btropical area of China. Intens.ve meas.rements.were conducted for a period of 12 months. s.il CO2 emis.ions.were als. modeled by multiple regres.ion analys.s.from daily air temperature, dry-bulb s.turated vapor pres.ure, relative humidity, atmos.heric pres.ure, s.il mois.ure, and s.il temperature. Data was.analyzed bas.d on s.il mois.ure levels.and air temperature with annual data being grouped into either hot-humid s.as.n or relatively cool s.as.n bas.d on the precipitation patterns. This.was.es.ential in order to acquire s.mplified exponential models.for parameter es.imation. Minimum and maximum daily mean s.il CO2 efflux rates.were obs.rved in November and j.ly, with res.ective rates.of 1.98 ± 0.66 and 11.04 ± 0.96 μmol m-2 s.1 being recorded. Annual average s.il CO2 emis.ion (FCO2) was.5.92 μmol m-2 s.1. Including all the weather variables.into the model helped to explain 73.9% of temporal variability in s.il CO2 emis.ion during the meas.rement period. s.il CO2 efflux increas.d with increas.ng s.il temperature and s.il mois.ure. Preliminary res.lts.s.owed that Q10, which is.defined as.the difference in res.iration rates.over a 10 -C interval, was.partly explained by fine root biomas.. s.il temperature and s.il mois.ure were the dominant factors.controlling s.il CO2 efflux and were regarded as.the driving variables.for CO2 production in the s.il. Including thes. two variables.in regres.ion models.could provide a us.ful tool for predicting the variation of CO2 emis.ion in the commercial fores. s.ils.of s.uth China .

关键词：时间变异性土壤 CO2 果园森林生态系