检索结果-南通市图书馆

Journal of Oceanology and Limnology 2023年第5期41卷 1978-1987页

作者： Yunlu xiao ning xiao xiaoqi ZENG Institute of Deep-sea Science and Engineering Chinese Academy of SciencesSanya 572000China Department of Marine Organism Taxonomy&Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laoshan Laboratory Qingdao 266237China Shandong Province Key Laboratory of Experimental Marine Biology Institute of OceanologyChinese Academy of SciencesQingdao 266071China Institute of Evolution&Marine Biodiversity Ocean University of ChinaQingdao 266003China

Benthodytes tetrapapillata *** collected from a seamount located on the Caroline Ridge at a depth of 2289 m,during the cruise of R/V Kexue in June *** provided detailed descriptions of external and deposits *** phylogenetic analyses based on cytochrome c oxidase I(COI)and a concatenated dataset of 16S and COI genes showed that the new species belonged to Benthodytes that is not *** details of morphological comparisons and molecular analyses confirmed that Benthodytes tetrapapillata *** a new psychropotid species.A state of main morphological characters in valid species of Benthodytes is also provided in this study.

关键词： Holothuroidea Benthodytes 16S cytochrome c oxidase I(COI) new species phylogenetic analysis

Design for a Crane Metallic Structure Based on Imperialist Competitive Algorithm and Inverse Reliability Strategy

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2017年第4期30卷 900-912页

作者： xiao-ning Fan Bo Zhi College of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China

Uncertainties in parameters such as materials, loading, and geometry are inevitable in designing metallic structures for cranes. When considering these uncertainty factors, reliability-based design optimization （RBDO） offers a more reasonable design approach. However, existing RBDO methods for crane metallic structures are prone to low convergence speed and high computational cost. A unilevel RBDO method, combining a discrete imperialist competitive algorithm with an inverse reliabil- ity strategy based on the performance measure approach, is developed. Application of the imperialist competitive algorithm at the optimization level significantly improves the convergence speed of this RBDO method. At the reli- ability analysis level, the inverse reliability strategy is used to determine the feasibility of each probabilistic constraint at each design point by calculating its a-percentile per- formance, thereby avoiding convergence failure, calcula- tion error, and disproportionate computational effort encountered using conventional moment and simulation methods. Application of the RBDO method to an actual crane structure shows that the developed RBDO realizes a design with the best tradeoff between economy and safety together with about one-third of the convergence speed and the computational cost of the existing method. This paper provides a scientific and effective design approach for the design of metallic structures of cranes.

关键词： Crane metallic structure Reliability-baseddesign optimization Imperialist competitive algorithmPerformance measure approach Inverse reliabilitystrategy

Discrete AKNS-D Hierarchy

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第3期47卷 385-389页

作者： WU xiao-ning Institute of Applied Mathematics Academy of Mathematics and System Sciences the Chinese Academy of SciencesP.O. Box 2734 Beijing 100080 China

In this paper, we consider the discrete AKNS-D hierarchy, make the construction of the hierarchy, prove the bilinear identity and give the construction of the τ-functions of this hierarchy.

关键词： discrete integrable system AKNS-D hierarchy

Twisted Duality Symmetry and Integrability of Hybrid Superstring on AdS2 × S^2

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第4X期48卷 680-684页

作者： XIE xiao-ning SKLLQG Institute of Earth Environment CAS Xi'an 710015 China Institute of Modern Physics Northwest University Xi'an 710069 China Department of Physics Ningbo University Ningbo 315211 China

In this paper, we show that there exists a twisted duality symmetry between the Maurer-Cartan equations and the equations of motion in the hybrid formalism for the type liB superstring in an AdS2 ×S2 background with Ramond-Ramond flux. As a result, from the twisted duality transformation, we construct the Lax connection with the spectral parameter, which ensures the integrability of the system.

关键词： hybrid superstring twisted duality symmetry Lax connection integrability

Analytical solution for the time-fractional heat conduction equation in spherical coordinate system by the method of variable separation

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2011年第6期27卷 994-1000页

作者： Ting-Hui ning xiao-Yun Jiang School of Mathematics Shandong University 250100 Jinan China

In this paper,using the fractional Fourier law,we obtain the fractional heat conduction equation with a time-fractional derivative in the spherical coordinate *** method of variable separation is used to solve the timefractional heat conduction *** Caputo fractional derivative of the order 0 〈 α≤ 1 is *** solution is presented in terms of the Mittag-Leffler *** results are illustrated graphically for various values of fractional derivative.

关键词： Fractional Fourier law Fractional heat conduction equation - Spherical coordinate system - The separation of variables Mittag-Leffler function

Strategy for Use of Rice Blast Resistance Genes in Rice Molecular Breeding

在线全文

学校读者我要写书评

暂无评论

Rice science 2020年第4期27卷 263-277页

作者： xiao ning WU Yunyu LI Aihong Institute of Agricultural Sciences for Lixiahe Region in Jiangsu Yangzhou 225007China Jiangsu Collaborative Innovation Center for Modern Crop Production Nanjing 210095China Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding Yangzhou UniversityYangzhou 225009China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China

Rice blast is one of the most destructive diseases affecting rice production *** development and rational use of resistant varieties has been the most effective and economical measure to control *** this review,we summarized the cloning and utilization of rice blast resistance genes,such as Pi1,Pi2,Pi9,Pi54,Pigm and *** concluded that three main problems in the current breeding of rice blast resistance are:availability of few R(resistance)genes that confer resistance to both seedling and panicle blast,the resistance effect of pyramided lines is not the result of a simple accumulation of resistance spectrum,and only a few R genes have been successfully used for molecular ***,novel utilization strategies for rice blast R genes in molecular breeding were proposed,such as accurately understanding the utilization of R genes in main modern rice varieties,creating a core resistant germplasm with excellent comprehensive traits,screening and utilizing broadspectrum and durable resistance gene ***,the trends and possible development direction of blast resistance improvement were also discussed,including new genes regulating resistance identified via GWAS(genome-wide association study)and improving rice blast resistance using genetic editing.

关键词： rice blast resistance gene molecular breeding strategy

Risk analysis and maintenance decision making of natural gas pipelines with external corrosion based on Bayesian network

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2022年第3期19卷 1250-1261页

作者： Yun-Tao Li xiao-ning He Jian Shuai College of Safety and Ocean Engineering China University of PetroleumBeijingChina

Buried natural gas pipelines are vulnerable to external corrosion because they are encased in a soil environment for a long *** the causes of external corrosion and taking specific maintenance measures is *** this work,a risk analysis and maintenance decision-making model for natural gas pipelines with external corrosion is proposed based on a Bayesian network.A fault tree model is first employed to identify the causes of external *** Bayesian network for risk analysis is determined *** maintenance strategies are then inserted into the Bayesian network to show a reduction of the *** costs of maintenance strategies and the reduced risk after maintenance are combined in an optimization function to build a decision-making *** of the limitations of historical data,some of the parameters in the Bayesian network are obtained from a probabilistic estimation model,which combines expert experience and fuzzy set ***,a case study is carried out to verify the feasibility of the maintenance decision *** indicates that the method proposed in this work can be used to provide effective maintenance schemes for different pipeline external corrosion scenarios and to reduce the possible losses caused by external corrosion.

关键词： Natural gas pipelines External corrosion Risk analysis Maintenance decision making Bayesian network

Sign-invariant and Explicit Solutions of Nonlinear Reaction-Diffusion Systems

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第6期49卷 1361-1364页

作者： ZHU xiao-ning ZHANG Shun-Li Center for Nonlinear Studies Department of Mathematics Northwest University Xi＇an 710069 China Center of Nonlinear Science Ningbo University Ningbo 315211 China

Using the sign-invariant theory, we study the nonlinear reaction-diffusion systems. We also obtain some new explicit solutions to the nonlinear resulting systems.

关键词： sign-invariant theory nonlinear reaction-diffusion system explicit solutions

Lax Connection of Strings in γ-Deformed Backgrounds

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第5期49卷 1265-1268页

作者： XIE xiao-ning YUE Rui-Hong SKLLQG Institute of Earth Environment the Chinese Academy of Sciences Xi＇an 710015 China Institute of Modern Physics Northwest University Xi＇an 710069 China Department of Physics Ningbo University Ningbo 315211 China

In this paper we consider classical strings propagating in γ-deformed AdS3 × S^3 backgrounds generated by TsT transformation on the AdS3 sector, which is described as the group manifold SL（2, R）, then we prove that the U（1） currents of strings with the twisted boundary conditions are equal to those in γ-deformed backgrounds. Using TsT transformation, we can derive the local Lax connection and the monodromy matrix in γ-deformed backgrounds with the spectral parameter, which ensures the classical integrability of the string theories.

关键词： TsT transformation Lax connection monodromy matrix integrability

Role of mechanical stretching and lipopolysaccharide in early apoptosis and IL-8 of alveolar epithelial typeⅡcells A549

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2012年第8期5卷 638-644页

作者： Qiao-Ming ning xiao-ning Sun Xin-Kai Zhao Department of Anesthesiology Hainan Provincial Hospital

Objective:To investigate the effects of mechanical stretching and lipopolysaccharide(LPS) on the early apoptosis and IL-8 production of alveolar epithelial type II cells ***:The experimental matrix consisted of three integrated *** the first study,A549 cells were subjected to different stretching strain frequency and duration time to see the effects on the early *** the second study,A549 cells were subjected to mechanical stretch(13%4 h, 0.3 Hz) and LPS(1 or 100 ng/mL) to see whether mechanical strain and LPS also have an addictive effect on the early *** the third study to investigate whether this addictive effect could be induced by LPS and mechanical stretch on IL-8 production,A549 cells were subjected to LPS(100 ng/mL) and mechanical strain(13%.0.3 Hz,4 h).Real time PCR and enzyme linked immunosorbent assay were used to measure mRN A and protein level of *** early apoptosis was detected by flow ***:Mechanical stretch induced the early apoptosis in a force and frequency and time-dependent *** the presence of LPS,mechanical stretch enhanced LPS-induced early apoptosis,especially in 100 ng/mL IPS group compared with 1 ng/ mL LPS and the control *** stretch increased IL-8 production and enhanced LPS-induced IL-8 screation both in mRNA and protein ***:Mechanical stretch can induce the early apoptosis and IL-8 *** stretch and LPS have an addictive effect on the early apoptosis and IL-8 production in alveolar type 2 cells,which is one of the mechanisms of ventilator-induced lung injury.

关键词： Mechanical stretch Early apoptosis Human alveolar typeⅡepithelial cells Lipopolysaccharide IL-8