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7篇 您的检索式:作者名="J.Kennedy"
    题名 作者 年代 出处 被引量
1Anti‐inflammatory drugs, analgesics and the risk of perforated colonic diverticular disease显示文摘C. R.Morris I. M.Harvey W. S. L.Stebbings C. T. M.Speakman H. J.Kennedy A. R.Hart 2003Br J Surg2003,,10:1
2The particle swarm-explosion,stability,and convergence in a multidimensional complex space显示文摘M.Clerc J.Kennedy 0,,01:1
3Teacher Clarity and Its Relationship to Student Achievement and Satisfaction显示文摘Constance V.Hines Donald R.Cruickshank John J.Kennedy 0,,01:1
4Language Learning and Its Impact on the Brain: Connecting Language Learning with the Mind Through Content‐Based Instruction显示文摘Teresa J.Kennedy 2008Foreign Language Annals2008,,3:1
5Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fn ray microchemistry, stable isotopes, and fatty acid profles显示文摘Background:Reproducing populations of invasive carps(Hypophthalmichthys spp.)could alter aquatic food webs and negatively afect native fshes in the Mississippi National River and Recreation Area(MISS)and the St.Croix National Scenic Riverway(SACN).However,proposed invasive carp barriers may also threaten populations of native migratory fshes by preventing movements of fsh between rivers that are necessary for life history requirements.In this study,nonlethal chemical techniques were used to provide baseline data related to the condition,trophic position,and migratory histories of lake sturgeon(Acipenser fulvescens)captured in the Mississippi and St.Croix Rivers.Results:Fish length and weight measurements and age estimates determined from pectoral fn rays demonstrated that lake sturgeon from the Mississippi River had greater lengths-at-age compared to sturgeon from the St.Croix River.However,length–weight relations were similar for sturgeon from the Mississippi and St.Croix Rivers.Lake sturgeon captured from diferent locations had distinguishable fatty acid signatures,and stable isotope analyses demonstrated that lake sturgeon from the Mississippi River generally feed at a higher trophic level than those in the St.Croix River.Strontium-to-calcium ratios(Sr:Ca)from fn ray cross sections indicated that sturgeon captured from the Mississippi River had higher Sr:Ca values than sturgeon captured from the St.Croix River,and natal origins and capture locations were not signifcantly diferent among sturgeon captured within individual rivers.Most sturgeon were captured in water with a similar Sr:Ca signature as their natal waters,indicating that there is some separation between populations of lake sturgeon in the St.Croix and Mississippi Rivers.However,Sr:Ca data indicated substantial variation in movement patterns among individual lake sturgeon,indicating that populations interact through migrations of individual fsh between rivers.Conclusions:Study results provide baseline condition and food web structure index data for assessing changes in lake sturgeon populations should invasive carps become established in these areas of the Mississippi and St.Croix Rivers.Controlled-exposure and telemetry studies would help verify and enhance the relations between Sr:Ca signatures in water and lake sturgeon pectoral fn rays to further assess mixing of sturgeons between rivers。Jefrey R.Ziegeweid Michelle R.Bartsch Lynn A.Bartsch Steven J.Zigler Robert J.Kennedy Seth A.Love 2021Ecological Processes2021,10,1:0
6Explaining Hong Kong Students’International Achievement in Civic Learning显示文摘This study identifies predictors of Hong Kong students’civic learning.It has adopted a cross-sectional quantitative design using secondary data from the 2009 International Civics and Citizenship Education Study(ICCS 2009;Schulz et al.,2010).Multi-level analysis reveals that most of the variance in student achievement can be accounted for by school level rather than individual level factors.Student background variables are largely insignificant suggesting the resilience of many Hong Kong students.Regarding Hong Kong students’achievements in civic learning,a possible explanation is made and implications are developed for both theory and practice.Kerry J.KENNEDY LI Lijuan 2016Frontiers of Education in China2016,11,3:0
7谱聚类的现状及其在社会网络中的应用(英文)显示文摘近年来,凭借其重要的研究意义,采用数据聚类去分析社会网络已成为时下最热门的话题之一。这些研究最直接应用的是防止恐怖袭击和社区通过检测疾病的传播。此外,由于社会网络是动态的,而社会关系的变化是可以通过数据聚类方法预测的。从而使得清楚了解社会网络结构将有助于促进社会发展和社会成员间的合作。从数据挖掘角度来看,社交网络是一种不完全的,庞大的,复杂的,动态的网络。而这些特性使得传统的数据聚类方法并不能成功应用在社会网络中。相反,作为一个最流行的现代数据的聚类算法,谱聚类在对社交网络的问题提供了一种系统的,灵活实用的解决方案。理论和实验证明,谱聚类在寻找全局最优解和处理大型数据集方面的性能优于传统聚类算法。一方面审视讨论当今谱聚类的理论和算法,及其优于传统聚类算法的特点。另一方面,也涵盖了社会网络的基本知识及两个典型的谱聚类在社会网络中的应用。孟钦学 Paul J.Kennedy 2013计算机工程与应用2013,49,3:0
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