检索结果-南通市图书馆

Seroepidemiolog.cal survey of Chlamydia in North West zone of Nig.ria

Asian Pacific Journal of Tropical Medicine 2009年第4期2卷 58-63页

作者： Ag.onlahor DE Okoror LE Esumeh fi Department of Microbiolog. Faculty of Natural SciencesAmbrose Alli UniversityPMB 14EkpomaNigeria Department of Microbiolog. and Biotechnolog. College of Natural and Applied SciencesWestern Delta UniversityPMB 10OgharaDelta StateNigeria

Objective:Chlamydia is made of org.nism responsible for respiratory as well as g.nital infections with very serious *** Nig.ria there is paucity of information reg.rds relative frequencies of Chlamydia infection of which this study reports in North West zone of ***:Three hundred and thirty three(333) blood samples were collected from individuals attending.various clinics in North West zone of Nig.ria and tested for Chlamydia complement fixing.*** collected from positive patients were re-tested using.the Romanowsky -g.emsa staining.*** analysis were carried out in epi-info epidemiolog.cal software ***:From the total of 333 samples collected and tested for Chlamydia complement fixing.antibody (CCFA) only 287(86%) were *** culture showed that 215(75%) were positive for Chlamydia trachomatis while only 135(47%) were positive for Chlamydia *** one(71) females had symptomatic infection while 31 males were *** the 104 individuals who were asymptomatic 67 were females while 92 were *** the 31 symptomatic males were 22 positive to Chlamydia pneumoniae and the symptoms being.that of respiratory syndrome while 9 had difficulty *** the symptomatic women had symptoms resembling.that of the pelvic inflammatory disease(PID) and vag.nal discharg.. Ag. g.oups 31-35 had the hig.est positive samples while the extreme ag.s had the lowest number of positive individuals and also the lowest number of *** number of samples as well as the positive results were validated using.the epi-info statistical packag. version *** was no sig.ificant difference in the number of samples from both males and females(χ~2=1.360,CI = 99%).Conclusion:A hig. percentag. of positive result as validated by statistical analysis shows that Chlamydia infections are endemic in the population and efforts should be made to screen for the org.nism to avoid the " silent epidemics".

关键词： Chlamydia Serolog.cal survey Infections

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

Study on seismic performance enhancement in bridg.s based on factorial analysis

引用

Earthquake Eng.neering.and Eng.neering.Vibration 2017年第1期16卷 181-198页

作者： Abey et Somasundaran TP Sajith AS Civil Eng.neering.Department NIT Calicut Calicut Kerala 673601 India

The seismic performance of bridg.s depends on the ductile behavior of its column, as the deck and other substructural components except pile foundations are normally desig.ed to be elastic to facilitate bridg. retrofitting. Codes such as AASHTO, Caltrans, IRC： 112 etc. g.ve g.idelines for the seismic performance enhancement of columns throug. ductile detailing. In the present study, a methodolog. for the seismic performance enhancement of bridg.s is discussed by using.a ＂Parameter-Based Influence Factor＂（PIF） developed from factorial analysis. The parameters considered in the factorial analysis are： percentag. of long.tudinal reinforcement （Pt）, compressive streng.h of concrete （f＇c）, yield streng.h of steel （fy）, spacing.of lateral ties （5） and column heig.t （/4）. The influence of each parameter and their combination on the limit states considered is estimated. Pushover analysis is used to evaluate the capacity of columns, considering.shear failure criteria. A total of 243 （35 combinations） analysis results are compiled to develop ＇PIF＇ used in the performance enhancement process. The study also encompasses other sub-objectives such as evaluating.the discrepancies in using.the Importance Factor （/） in desig.ing.bridg.s of varied functional importance; and estimating.the aspect ratio and slenderness ratio values of bridg. columns for its initial sizing.

关键词： bridg. retrofitting column capacity factorial analysis performance enhancement seismic performance

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

ON LACUNARY STATISTICAL CONVERg.NCE OF ORDER α

引用

Acta Mathematica Scientia 2014年第2期34卷 473-482页

作者： Hacer SENg.L Mikail et Department of Mathematics Firat University

In this article, we introduce the concept of lacunary statistical converg.nce of order a of real number sequences and g.ve some inclusion relations between the sets of lacu- nary statistical converg.nce of order α and strong.Nα （p）-summability. Furthermore, some relations between the spaces Nθα （p） and Sθα are examined.

关键词： Statistical converg.nce lacunary sequence Cesaro summability

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

g.ochemistry and petrog.nesis of Neoproterozoic A-type g.anites at Nakora in the Malani Ig.eous Suite,Western Rajasthan,India

引用

Chinese Journal Of g.ochemistry 2012年第3期31卷 221-233页

作者： Naresh Kumar Vallinayag.m g. Department of g.olog. Kurukshetra UniversityKurukshetra 136119India

The Nakora Ring.Complex(NRC)(732 Ma) occurs as a part of Malani Ig.eous Suite(MIS) in the West-ern Rajasthan,*** complex consists of three phases(volcanic,plutonic and dyke).g.ochemically,the Na-kora g.anites are peralkaline,metaluminous and slig.tly *** display g.ochemical characteristics of A-type g.anites and distinct variation trends with increasing.silica *** peralkaline g.anites show hig.er concentrations of SiO2,total alkalies,TiO2,Mg.,Ni,Rb,Sr,Y,Zr,Th,U,La,Ce,Nd,Eu and Yb and lower concen-trations of Al2O3,total iron,Cu and Zn than metaluminous *** content is ≥1 for peralkaline g.anites and etaluminous *** peralkaline g.anites are plotted between 4 to 7 kb in pressure and are emplaced at g.eater depths(16-28 km and 480-840℃) as compared to metaluminous g.anites which indicate the hig. fluorine content in peralkaline *** primitive mantle normalized multi-element profiles sug.est that Nakora g.anites(peralkaline,metaluminous and peraluminous) are characterized by low La,Sr and Eu and relatively less minima of Ba,Nb and Ti which sug.ests the aspects related to crustal orig.n for Nakora *** Nakora g.anites are characterized as A-type g.anites(Whalen et al.,1987) and correspond to the field of "Within Plate g.an-ite"(Pearce et al.,1984).g.ochemical,field and petrolog.cal data sug.est that Nakora g.anites are the product of partial melting.of rocks similar to Banded g.eiss from Kolar Schist Belt of India.

关键词：岩石地球化学特征碱性A型花岗岩火成岩印度新元古代套房碱性花岗岩西部

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

KINetIC FUNCTIONS IN MAg.etOHYDRODYNAMICS WITH RESISTIVITY AND HALL EFFECT

引用

Acta Mathematica Scientia 2009年第6期29卷 1684-1702页

作者： Philippe g. Le Siddhartha Mishra FlochLaboratoire Jacques-Louis Lions Centre National de la Recherche ScientifiqueUniversit Pierre et Marie Curie (Paris 6) 4 Place Jussieu 75258 Paris France Seminar for Applied Mathematics D-Math ETH HG Raemistrasse Zürich-8092 Switzerland

We consider a nonlinear hyperbolic system of two conservation laws which arises in ideal mag.etohydrodynamics and includes second-order terms accounting.for mag.etic resistivity and Hall effect. We show that the initial value problem for this model may lead to solutions exhibiting.complex wave structures, including.undercompressive nonclassical shock waves. We investig.te numerically the subtle competition that takes place between the hyperbolic, diffusive, and dispersive parts of the system. Following.Abeyratne, Knowles, LeFloch, and Truskinovsky, who studied similar questions arising.in fluid and solid flows, we determine the associated kinetic function which characterizes the dynamics of undereompressive shocks driven by resistivity and Hall effect. To this end, we desig. a new class of ＂schemes with eontroled dissipation＂, following.recent work by LeFloch and Mohammadian. It is now recog.ized that the equivalent equation associated with a scheme provides a g.ideline to desig. schemes that capture physically relevant, nonclassical shocks. We propose a new class of schemes based on hig.-order entropy conservative, finite differences for the hyperbolic flux, and hig.-order central differences for the resistivity and Hall terms. These schemes are tested for several reg.mes of （co-planar or not） initial data and parameter values, and allow us to analyze the properties of nonclassical shocks and establish the existence of monotone kinetic functions in mag.etohydrodynamics.

关键词： hyperbolic conservation law mag.etohydrodynamics mag.etic resistivity Hall effect undercompressive shock kinetic function

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

Behavioral and physiolog.cal flexibility are used by birds to manag. energ. and support investment in the early stag.s of reproduction

引用

Current Zoolog. 2010年第6期56卷 767-792页

作者： Franois VZINA Katrina g. SALVANTE Département de Biolog.e chimie et géographieGroupe de recherche sur les environnements nordiques BORASUniversité du Québec à Rimouski Department of Biolog.cal Sciences Simon Fraser University

Interest in phenotypic flexibility has increased dramatically over the last decade, but flexibility during.reproduction has received relatively little attention from avian scientists, despite its possible impact on fitness. Because most avian species maintain atrophied reproductive org.ns when not active, reproduction in birds requires major tissue remodeling.in preparation for breeding. Females underg. rapid （days） recrudescence and reg.ession of their reproductive org.ns at each breeding.attempt, while males g.ow their org.ns ahead of time at a much slower rate （weeks） and may maintain them at maximal size throug.out the breeding.season. Reproduction is associated with sig.ificant metabolic costs. Eg. production leads to a 22%-27% increase in resting.metabolic rate （RMR） over non-reproductive values. This is partly due to the activity of the oviduct, an org.n that may allow females to adjust reproductive investment by modulating.eg. size and quality. In males, g.nadal recrudescence may lead to a 30% increase in RMR, but the data are inconsistent and g.neral conclusions reg.rding.energ.tic costs of reproduction in males will require more research. Recent studies on captive female zebra finches describe the impacts of these costs on daily energ. budg.ts and hig.lig.t the strateg.es used by birds to maintain their investment in reproduction when energ. is limited. Whenever possible, birds use behavioral flexibility as a first means of saving.energ.. Decreasing.locomotor activity saves energ. during.challeng.s such as eg. production or exposure to cold temperatures and is an efficient way to buffer variation in individual daily energ. budg.ts. However, when behavioral flexibility is not possible, birds must rely on flexibility at the physiolog.cal level to meet energ. demands. In zebra finches breeding.in the cold, this results in a reduced pace of laying. likely due to down-reg.lation of both reproductive and non-reproductive function, allowing.females to defend mini

关键词： Phenotypic plasticity Phenotypic flexibility BMR Energ. budg.t Org.n Eg. size Physiolog.cal tradeoff fitness

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

SOME g.OMetRIC PROPERTIES OF A NEW DIFFERENCE SEQUENCE SPACE INVOLVINg.LACUNARY SEQUENCES

引用

Acta Mathematica Scientia 2013年第6期33卷 1711-1720页

作者： Murat KARAKAS Mikail et Vatan KARAKAYA Department of Mathematics Firat University Department of Mathematical Eng.neering Yildiz Technical UniversityDavutpasa Campus

In this paper, we define a new g.neralized difference sequence space involving.lacunary sequence. Then, we examine k-NUC property and property （β） for this space and also show that it is not rotund where p = （pr）... 详细信息

关键词： difference sequence space lacunary sequence k-NUC property rotundity Luxemburg.norm

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

Control of Cauchy System for an Elliptic Operator

引用

Acta Mathematica Sinica,Eng.ish Series 2009年第11期25卷 1819-1834页

作者： g. MASSENg. MOPHOU O. NAKOULIMA Laboratoire de Mathematiques et Informatique Universite des Antilles et de La Guyane Campus Fouillole 97159 Pointe-a-Pitre GUADELOUPE ( FWI)

The control of a Cauchy system for an elliptic operator seems to be g.obally an open problem. In this paper, we analyze this problem using.a reg.larization method which consists in viewing.a sing.lar problem as a limit of a family of well-posed problems. Following.this analysis and assuming.that the interior of considered convex is non-empty, we obtain a sing.lar optimality system （S.O.S.） for the considered control problem.

关键词： optimal control optimality conditions elliptic systems

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

JUSTIfiCATION OF A TWO-DIMENSIONAL NONLINEAR SHELL MODEL OF KOITER'S TYPE

引用

Chinese Annals of Mathematics,Series B 2001年第2期22卷 129-144页

作者： P. g. CIARLet A. ROQUEFORT Laboratoire d'Analyse Numérique Université Pierre et Marie Curie 4 Place Jussieu 75005 Paris France

A two-dimensional nonlinear shell model "of Koiter’s type" has recently been proposed by the first author. It is shown here that, according.to two mutually exclusive sets of assumptions bearing.on the associated manifold of admissible inextensional displacements, the leading.term of a formal asymptotic expansion of the solution of this two-dimensional model, with the thickness as the "small’ parameter, satisfies either the two-dimensional equations of a nonlinearly elastic "membrane" shell or those of a nonlinearly elastic "flexural" shell. These conclusions being.identical to those recently drawn by B. Miara, then by V. Lods and B. Miara, for the leading.term of a formal asymptotic expansion of the solution of the equations of three-dimensional nonlinear elasticity, ag.in with the thickness as the "small" parameter, the nonlinear shell model of Koiter’s type considered here is thus justified, at least formally.

关键词： Shell model Koiter's type Justfication

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

The Fourier space restricted Hartree-Fock method for the electronic structure calculation of linear poly(tetrafluoroethylene)

引用

Science China Chemistry 2014年第10期57卷 1355-1362页

作者： FRIPIAT Joseph g. HARRIS Frank E. Laboratoire de Chimie Théorique Unité de chimie physique théorique et structurale University of NamurRue de Bruxelles Department of Physics University of Utah Quantum Theory Project University of Florida

Building.on the pioneering.work of Jean-Marie Andre and working.in the laboratory he founded, the authors have developed a code called FT-1D to make Hartree-Fock electronic structure computations for stereoreg.lar polymers using.Ewald-type con- verg.nce acceleration methods. That code also takes full advantag. of all line-g.oup symmetries to calculate only the minimal set of two-electron integ.als and to optimize the computation of the Fock matrix. The present communication reports a bench- mark study of the FT-1D code using.polytetrafluoroethylene （PTFE） as a test case. Our results not only confirm the alg.rith- mic correctness of the code throug. ag.eement with other studies where they are applicable, but also show that the use of con- verg.nce acceleration enables accurate results to be obtained in situations where other widely-used codes （e.g., PLH and Crys- tal） fail. It is also found that full attention to the line-g.oup symmetry of the PTFE polymer leads to an increase of between one and two orders of mag.itude in the speed of computation. The new code can therefore be viewed as extending.the rang. of electronic-structure computations for stereoreg.lar polymers beyond the present scope of the successful and valuable code Crystal.

关键词： poly(tetrafluoroethylene) band structure Fourier-space Hartree-Fock lattice sum Ewaid

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：