检索结果-南通市图书馆

Dam deformation analysis based on BPNN merging models

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geo-Spatial Information Science 2018年第2期21卷 149-157页

作者： Jingui Zou Kien-Trinh Thi Bui Yangxuan Xiao Chinh Van Doan School of Geodesy and Geomatics Wuhan UniversityWuhanChina Geomatics Centre Thuyloi UniversityHanoiVietnam Institute of Technique Special Engineering Le Quy Don Technical UniversityHanoiVietnam

Hydropower has made a significant contribution to the economic development of Vietnam,thus it is important to monitor the safety of hydropower dams for the good of the country and the *** this paper,dam horizontal displacement is analyzed and then forecasted using three methods:the multi-regression model,the seasonal integrated auto-regressive moving average(SARIMA)model and the back-propagation neural network(BPNN)merging *** monitoring data of the Hoa Binh Dam in Vietnam,including horizontal displacement,time,reservoir water level,and air temperature,are used for the *** results indicate that all of these three methods can approximately describe the trend of dam deformation despite their different forecast ***,their short-term forecasts can provide valuable references for the dam safety.

关键词： Dam deformation analysis multi-regression model Back-propagation Neural Network(BPNN) Seasonal Integrated Auto-regressive Moving Average(SARIMA)model merging model

Geometry of skew information-based quantum coherence

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第10期72卷 70-79页

作者： Zhao-Qi Wu Huai-Jing Huang Shao-Ming Fei Xian-Qing Li-Jost Department of Mathematics Nanchang UniversityNanchang 330031China School of Mathematical Sciences Capital Normal UniversityBeijing 100048China Max-Planck-Institute for Mathematics in the Sciences D-04103 LeipzigGermany

We study the skew information-based coherence of quantum states and derive explicit formulas for Werner states and isotropic states in a set of autotensors of mutually unbiased bases(MUBs).We also give surfaces of skew information-based coherence for Bell-diagonal states and a special class of X states in both computational basis and in ***,we depict the surfaces of the skew information-based coherence for Bell-diagonal states under various types of local nondissipative quantum *** results show similar as well as different features compared with relative entropy of coherence and l1 norm of coherence.

关键词： coherence skew information mutually unbiased bases quantum channels

Optimal Model of Continuous Knowledge Transfer in the Big Data Environment

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2018年第7期116卷 89-107页

作者： Chuanrong Wu Evgeniya Zapevalova Yingwu Chen Deming Zeng FrancisLiu School of Economy and Management Changsha University of Science&TechnologyChangsha410114P.R.China College of Information System and Management National University of Defense TechnologyChangsha410073China School of Business Administration Hunan UniversityChangsha410082China LMBA Universite de Bretagne-SUD56017 VannesFrance

With market competition becoming fiercer,enterprises must update their products by constantly assimilating new big data knowledge and private knowledge to maintain their market shares at different time points in the big data ***,there is mutual influence between each knowledge transfer if the time interval is not too *** is necessary to study the problem of continuous knowledge transfer in the big data *** on research on one-time knowledge transfer,a model of continuous knowledge transfer is presented,which can consider the interaction between knowledge transfer and determine the optimal knowledge transfer time at different time points in the big data *** experiments were performed by adjusting several *** experimental results verified the model’s validity and facilitated conclusions regarding their practical application *** experimental results can provide more effective decisions for enterprises that must carry out continuous knowledge transfer in the big data environment.

关键词： Big data knowledge transfer optimization model simulation experiment different time points

Semi-analytical Modeling of the Influence of Macro Bending Effects on Micro Contact-Inhomogeneity Problems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Solida Sinica 2023年第6期36卷 860-874页

作者： Jinran Li Linlin Sun Ning Zhao Pu Li School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory of Road Construction Technology and Equipment of the Ministry of Education Chang’an UniversityXi’an 710064China Shaanxi Key Laboratory of Gear Transmissions Xi’an 710072China School of Science Harbin Institute of TechnologyShenzhen 518055China

This study examines the effects of macroscopic bending and microscopic contact loading in inhomogeneous materials using a semi-analytical model based on Eshelby’s equivalent inclusion *** model accounts for bending effects through the beam theory,with bending stress included in the Eshelby’s equivalent inclusion *** macroscopic displacement resulting from bending effects is incorporated into the microscopic contact solver,and the final displacement is determined using the conjugate gradient method in an iterative *** efficiency can be improved by incorporating the discrete convolution and fast Fourier *** core scheme is validated using the finite element method,yielding accurate and efficient results for bending-contact problems in inhomogeneous *** reveal the interplay between bending,contact loading,and inhomogeneity,as stress around the inhomogeneity alters and the stress concentration area expands under increasing bending ***,low-magnitude negative bending moments reduce both contact pressure and stress around the *** position where inhomogeneities are least affected shifts from the neutral surface depending on the coupling *** model provides a valuable bridge for connecting the macroscopic bending effect and microscale contact-inhomogeneity problems by visualizing stress fields and assessing pressure distributions.

关键词： Contact analysis Bending effects Inhomogeneity Equivalent inclusion method Semi-analytical model

Identification of key genes involved in post-traumatic stress disorder:Evidence from bioinformatics analysis

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 Journal of Psychiatry 2020年第12期10卷 286-298页

作者： Yao-Yao Bian Li-Li Yang Bin Zhang Wen Li Zheng-Jun Li Wen-Lin Li Li Zeng School of Nursing Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina School of First Clinical Medicine Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina Jingwen Library Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina Digestive Department Ningbo Hospital of Traditional Chinese MedicineNingbo 315200Zhejiang ProvinceChina School of Preclinical Medicine Guizhou University of Traditional Chinese MedicineGuiyang 550025Guizhou ProvinceChina Management School University of St AndrewsSt Andrews KY169AJUnited Kingdom College of Health Economics Management Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina

BACKGROUND Post-traumatic stress disorder(PTSD)is a serious stress-related *** To identify the key genes and pathways to uncover the potential mechanisms of PTSD using bioinformatics *** Gene expression profiles were obtained from the Gene Expression Omnibus *** differentially expressed genes(DEGs)were identified by using *** functional annotation and pathway enrichment were then *** gene-pathway network was constructed with Cytoscape *** real-time polymerase chain reaction(qRT-PCR)analysis was applied for validation,and text mining by Coremine Medical was used to confirm the connections among genes and *** We identified 973 DEGs including 358 upregulated genes and 615 downregulated genes in PTSD.A group of centrality hub genes and significantly enriched pathways(MAPK,Ras,and ErbB signaling pathways)were identified by using gene functional assignment and enrichment *** genes(KRAS,EGFR,NFKB1,FGF12,PRKCA,and RAF1)were selected to validate using *** results of text mining further confirmed the correlation among hub genes and the enriched *** indicated that these altered genes displayed functional roles in PTSD via these pathways,which might serve as key signatures in the pathogenesis of *** The current study identified a panel of candidate genes and important pathways,which might help us deepen our understanding of the underlying mechanism of PTSD at the molecular ***,further studies are warranted to discover the critical regulatory mechanism of these genes via relevant pathways in PTSD.

关键词： Post-traumatic stress disorder Differentially expressed genes Key pathway Gene-pathway co-expression Bioinformatics analysis Microarray

On the Response of Subduction in the South Pacific to an Intensification of Westerlies and Heat Flux in an Eddy Permitting Ocean Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2017年第4期34卷 521-531页

作者： Chengyan LIU Zhaomin WANG Bingrui LI Chen CHENG Ruibin XIA Polar Climate System and Global Change Laboratory Nanjing University of Information Science and TechnologyNanjing 210044China Polar Research Institute of china Shanghai 200136China

Based on an eddy permitting ocean general circulation model, the response of water masses to two distinct climate scenarios in the South Pacific is assessed in this paper. Under annually repeating atmospheric forcing that is characterized by different westerlies and associated heat flux, the response of Subantarctic Mode Water（SAMW） and Antarctic Intermediate Water（AAIW） is quantitatively estimated. Both SAMW and AAIW are found to be warmer, saltier and denser under intensified westerlies and increased heat loss. The increase in the subduction volume of SAMW and AAIW is about 19.8 Sv（1 Sv =10-6m-3s-（-1））. The lateral induction term plays a dominant role in the changes in the subduction volume due to the deepening of the mixed layer depth（MLD）. Furthermore, analysis of the buoyancy budget is used to quantitatively diagnose the reason for the changes in the MLD. The deepening of the MLD is found to be primarily caused by the strengthening of heat loss from the ocean to the atmosphere in the formation region of SAMW and AAIW.

关键词： subduction mixed layer depth westerlies heat flux buoyance flux

Optimized monogamy and polygamy inequalities for multipartite qubit entanglement

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第10期30卷 154-164页

作者： Jia-Bin Zhang Zhi-Xiang Jin Shao-Ming Fei Zhi-Xi Wang School of Mathematical Sciences Capital Normal UniversityBeijing 100048China School of Physics University of Chinese Academy of SciencesBeijing 100049China

We investigate the monogamy and polygamy inequalities of arbitrary multipartite quantum states,and provide new classes of monogamy and polygamy inequalities of multiqubit entanglement in terms o f concurrence,entanglement of formation,negativity,and Tsallis-q entanglement,*** show that these new monogamy and polygamy inequality relations are tighter than the existing ones with detailed examples.

关键词： monogamy inequalities polygamy inequalities entanglement measures

Decision Model of Knowledge Transfer in Big Data Environment

在线全文

学校读者我要写书评

暂无评论

china Communications 2016年第7期13卷 100-107页

作者： Chuanrong Wu Yingwu Chen Feng Li Changsha University of Science&Technology ChangshaChina National University of Defense Technology ChangshaChina

A decision model of knowledge transfer is presented on the basis of the characteristics of knowledge transfer in a big data *** model can determine the weight of knowledge transferred from another enterprise or from a big data *** simulation experiments are implemented to test the efficiency of the optimization *** experiment results show that when increasing the weight of knowledge from big data knowledge provider,the total discount expectation of profits will increase,and the transfer cost will be *** calculated results are in accordance with the actual economic *** optimization model can provide useful decision support for enterprises in a big data environment.

关键词： big data knowledge transfer optimization simulation dynamic network

Polymerization of pyrrole induced by pillar[5]arene functionalized graphene for supercapacitor electrode

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第11期33卷 4846-4849页

作者： Fang Guo Junqiang Guo Zhiqiang Zheng Tao Xia Aadil Nabi Chishti Liwei Lin Wang Zhang Guowang Diao School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China Department of Applied Bioengineering Graduate School of Convergence Science and TechnologySeoul National UniversitySuwon 443-270South Korea

Conducting polymer is an important electrode material for supercapacitors because of its high initial specific ***,a novel nanocomposite composed of polypyrrole(PPy)film homogeneously immobilized on the pillar[5]arene functionalized reduced graphene oxide nanosheets(RGO-HP5 A-PPy)was successfully ***-HP5 A induced pyrrole to polymerize on the graphene surface and the specific capacitance loss caused by PPy agglomeration was ***,the specific capacitance of RGOHP5 A-PPy was up to 495 F/g at 1 A/*** with pure PPy(319 F/g),the specific capacitance was increased by 55%.The specific capacitance retention of the assembled symmetric supercapacitor reached76%after 10,000 cycles at 5 A/*** study gave full play to the advantages of pillar[5]arene,graphene and PPy,and was expected to promote the development of supramolecular functionalized composites in energy storage.

关键词： Nanocomposite Pillararene Graphene Polypyrrole Supercapacitor