检索结果-南通市图书馆

Analysis of energy pile groups subjected to non-uniform thermal loadings

在线全文

学校读者我要写书评

暂无评论

Underground Space 2023年第2期9卷 91-104页

作者： Kang Fei Shi-Jia Ding Hong-Yu Qin Department of Civil Engineering Yangzhou UniversityYangzhouJiangsu 225127China College of Science and Engineering Flinders UniversityAdelaide SA5042Australia

Sequentially coupled thermal-stress finite element analyses were performed to investigate the mechanical behaviors of an energy pile group subjected to non-uniform thermal *** group effect was highlighted by comparing the thermo-mechanical responses with those of the single pile *** to the thermal interactions between piles,the group piles’temperatures were higher than that of the isolated single *** only part of the piles served as heat exchangers,i.e.,the pile group was thermal loaded unevenly,there were dif-ferential deformations between the heated and the non-heated *** to the pile-raft-pile interaction,the axial forces of the piles chan-ged *** location of the heated pile had an important influence on the thermally induced axial force,while the effect of the soil’s coefficient of thermal expansion was not *** by the numerical result,a simplified method was proposed to capture the main characteristics of energy pile groups and to facilitate the *** proposed method was developed in the framework of the traditional load transfer approach,and the pile-raft-pile interaction was *** applying different temperature increments to dif-ferent piles,the non-uniform thermal loading was *** proposed method was verified by comparing with the finite element anal-ysis results and the data collected from the literature.

关键词： Energy pile group Non-uniform thermal loading group effect Thermo-mechanical response

Aggregation behavior of Harmonia axyridis under non-wintering conditions

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

Insect Science 2015年第5期22卷 670-678页

作者： Delphine Durieux Berenice Fassotte Jean-Louis Deneubourg Yves Brostaux Axel Vandereycken Emilie Joie Eric Haubruge Frangois J. Verheggen Functional and Evolutionary Entomology Gembloux Agro-Bio Tech University of Liege Gembloux Belgium Unit of Social Ecology Universite libre de Bruxelles Brussels Belgium and Applied Statistics Computer Science and Mathematics Gembloux Agro-Bio Tech University of Liege Gembloux Belgium

The invasive multicolored Asian ladybeetle, Harmonia axyridis （Pallas）（Coleoptera： Coceinellidae）, aggregates inside dwellings during winter to avoid cold weather. This adaptive behavior disturbs homeowners, because of the large numbers of individuals that aggregate, which induces allergic reactions. The migratory flight patterns of this species have been well documented, with individuals preferentially moving toward prominent and high color contrast elements. However, the factors involved in the selection of aggregation sites by this species have yet to be elucidated. Here, we evaluated the influ- ence of （i） the density of individuals and （ii） the type of available shelters on decisions by H. axyridis to settle and aggregate under shelters. A dual choice bioassay conducted in the laboratory demonstrated the presence of mutual attraction to conspecifics. We also found that individuals preferentially settled under red covered shelters compared to transparent shelters, and that the type of shelter outweighed the effect of social interactions among conspecifics. Moreover, this experiment was performed under non-wintering conditions, providing the first evidence that aggregative behavior in this species can also occur under those specific conditions.

关键词： group effect invasive species luminosity multicolored Asian ladybeetle shelter selection social behavior

Nonlinear analysis of pile groups subjected to combined lateral and torsional loading

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

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2020年第3期21卷 179-192页

作者： Ling-gang KONG Zhong-chang ZHANG Yun-min CHEN Institute of Geotechnical Engineering College of Architectural and Civil EngineeringZhejiang UniversityHangzhou 310058China

An empirical approach has been developed to analyze the nonlinear response of a pile group with arbitrarily distributed piles subjected to combined lateral and torsional *** this approach,the concept of instantaneous twist center is applied to analyze the displacement relationship of pile heads and establish the static equilibrium equations of the pile *** horizontal interaction among the individual piles is considered through the generalized *** coupling effect of lateral resistance on the torsional resistance of each pile is quantified using an empirical factorβ;the lateral and torsional nonlinear responses of individual piles are modeled by p-y andτ-θcurves,*** proposed approach not only captures the most significant aspect of the group effect and coupling effect in a pile group subjected to combined lateral and torsional loading,but also automatically updates p-multipliers of individual piles based on pile cap *** proposed approach was verified using results of model tests on pile groups subjected to lateral loading,torsional loading,and combined lateral and torsional loading,*** general,the pile cap response and the transfer of applied loads in the pile groups agree well with the test results.

关键词： Combined lateral and torsional loading Pile groups Twist center p-multiplier group effect

Observation of the in vitro Transcription of the Mouse (Balb/c) Heart Nuclear DNA Fragments by AFM

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2002年第2期8卷 23-30页

作者：袁明秀 Ren Zhong JIN Rui Niu Weiran Zhang Zhihong Hong Wei Li Jianwei College of Life Sciences Peking University Beijing 100871 P.R.China The Institute of Chemistry Chinese Academy of Sciences Beijing 100080 P.R.China

It is observed that the regulation sequences at the two ends of every active gene of the heart nuclear DNA fragments may differentially combine with active regulation factors such as some specific binding proteins by using AFM and other experimental technologies. These active genes form different "gene knots", which are separated by "intervals". Using AFM, occasionally, it is also discovered that during the transcription stage, the heart nuclear DNA fragments consist of 3 4 5 "gene knots" and related "intervals", which form various "gene lineages" respectively by some "permutation and combination". Each gene lineage is likely to form nRNA chain like complexes that are 3 times the quantity of gene knots, and each nRNA chain like complex is connected with both ends of corresponding gene lineage. One gene knot of the DNA fragments participates the formation of different gene lineage and corresponding RNA chain like complexes by different combination. By posttranscriptional modification, they can form nmRNA linear chain like complexes that show the speciality of tissues. The beginnings of transcription units have the same number as gene lineages, and all gene lineages in DNA molecules may transcribe efficiently from corresponding beginnings of transcription unit simultaneously. Our work shows the prospective application of AFM in the research of the diversity of gene lineages formation from gene knots in the transcription stage and the efficiency of gene knots transcription.

关键词： gene knot transcription group effect gene lineage nRNA chain like complex nmRNA chain like complex AFM

The Application and Property of Elastic Net Procedure for Partially Linear Models

在线全文

学校读者我要写书评

暂无评论

Chinese Quarterly Journal of Mathematics 2020年第3期35卷 290-301页

作者： HUANG Deng-xiang LI Chun-hong QIN Chao-yong LU Chun-ting Guangxi Financial Vocational College Nanning 530007China School of Mathematics and Information Sciences Guangxi UniversityNanning 530004China

Variable selection plays an important role in high-dimensional data *** the high-dimensional data often induces the strongly correlated variables problem,which should be properly *** this paper,we propose Elastic Net procedure for partially linear models and prove the group effect of its estimate.A simulation study shows that the Elastic Net procedure deals with the strongly correlated variables problem better than the Lasso,ALasso and the Ridge *** on the real world data study,we can get that the Elastic Net procedure is particularly useful when the number of predictors pffis much bigger than the sample size n.

关键词： Elastic Net partially linear models group effect Lasso ALasso