检索结果-南通市图书馆

Early Detection of Heartbeat from Multimodal Data Using RPA learning with kDNN-SAE

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第4期45卷 545-562页

作者： A.k.S.Saranya T.Jaya Department of Electronics and Communication Engineering Ponjesly College of EngineeringNagercoilIndia Department of Electronics and Communication Engineering CSI Institute of TechnologyNagercoilIndia

Heartbeat detection stays central to cardiovascular an electrocardiogram(ECG)is used to help with disease diagnosis and *** Convolutional Neural Network(CNN)-based methods suffer from the less generalization problem thus;the effectiveness and robustness of the traditional heartbeat detector methods cannot be *** contrast,this work proposes a heartbeat detector krill based Deep Neural Network Stacked Auto Encoders(kDNN-SAE)that computes the disease before the exact heart rate by combining features from multiple ECG *** are classified independently and multiple signals are fused to estimate life threatening conditions earlier without any error in classification of heart *** work contained Training and testing stages,in the preparation part at first the Adaptive Filter Enthalpy-based Empirical Mode Decomposition(EMD)is utilized to eliminate the motion artifact in the *** that point,the robotic process automation(RPA)learning part extracts the effective features are extracted,and normalized the value of the feature then estimated utilizing the RPA loss *** last kDNN-SAE prepared training for the data stored in the *** the subsequent stage,input signal compute motion artifact and RPA learning the evaluation part determines the detection of *** early diagnosis of heart failures is an essential *** results of the experiments show that our proposed method has a high score outcome of *** to the CIF,which reaches *** CNN and Artificial Neural Network(ANN)had less score 0.95115 and 0.90147.

关键词： Deep neural network krill herd optimization stack auto-encoder adaptive filter enthalpy based empirical mode decomposition robotic process automation

Generalized thermoelastic functionally graded spherically isotropic solid containing a spherical cavity under thermal shock

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

Applied Mathematics and Mechanics(English Edition) 2008年第10期29卷 1263-1278页

作者： M.k.Ghosh M.kanoria Department of Mathematics Serampore CollegeSeramporeHooghly-712201India Department of Applied Mathematics University of Calcutta 92 A.P.C.RoadKolkata-700009India

This paper is concerned with the determination of thermoelastic displacement, stress and temperature in a functionally graded spherically isotropic infinite elastic medium having a spherical cavity, in the context of the linear theory of generalized thermoelasticity with two relaxation time parameters （Green and lindsay theory）. The surface of cavity is stress-free and is subjected to a time-dependent thermal shock. The basic equations have been written in the form of a vector-matrix differential equation in the laplace transform domain, which is then solved by an eigenvalue approach. Numerical inversion of the transforms is carried out using the Bellman method. Displacement, stress and temperature are computed and presented graphically. It is found that variation in the thermo-physical properties of a material strongly influences the response to loading. A comparative study with a corresponding homogeneous material is also made.

关键词： generalized thermoelasticity functionally graded material (FGM) Green-lindsay theory vector-matrix differential equation Bellman method

Effect of Applied Pressure on the Joining of Combustion Synthesized Ni_3Al Intermetallics with Al Alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2008年第1期24卷 123-126页

作者： G.S.Cho J.H.Yang k.H.Choe k.W.lee A.Ikenaga Advanced Material Processing Team Korea Institute of Industrial Technology 7-47 Songdo-Dong Yeonsu-Ku Incheon 406-840 Korea Department of Metallurgy and Materials Science Graduate School of Engineering Osaka Prefecture University 1-1 Gakuen-Cho Sakai Osaka 599-8531 Japan

We focused on the surface reinforcement of ligth weight casting alloys with Ni-AI intermetallic compounds by in-situ combustion reaction to improve the surface properties of non-ferrous casting *** our previous works,green compact of elemental Ni and Al powders were reacted to form Ni-3Al intermetallic compound by SHS （Self-propagating high temperature synthesis） reaction with the heat of molten Al alloy and simultaneously bonded with Al casting *** some defects such as tiny cracks and porosities were remained in the reacted *** we applied pressure to prevent thermal cracks and fill up the pores with liquid Al alloy by squeeze casting *** compressed Al alloy bonded with the Ni-3Al intermetallic compound was sectioned and observed by optical microscopy and scanning electron microscopy （SEM）.The stoichiometric compositions of the intermetallics formed around the bonded interface and in the reacted compact were identified by energy dispersive spectroscopy （EDS） and electron probe micro analysis （EPMA）. Si rich layer was formed on the Al alloy side near the bonded interface by the sequential solidification of Al *** porosities observed in the reacted Ni-3Al compact were filled up with the liquid AI *** Si particles from the molten Al alloy were detected in the pores of reacted Ni-3Al intermetallic *** Al casting alloy and Ni-3Al intermetallic compound were joined very soundly by applying pressure to the liquid Al alloy.

关键词： Joining Combustion synthesis Ni3AI Intermetallic compound Squeeze casting

GIS-based assessment of non-equilibrium pattern between groundwater recharge and irrigation draft in a semi-arid region of Rajasthan, India

在线全文

学校读者我要写书评

暂无评论

Journal of Arid land 2016年第2期8卷 184-196页

作者： Bidyut k BHADRA Sanjay kUMAR Rakesh PAlIWAl Regional Remote Sensing Centre National Remote Sensing Centre Indian Space Research Organisation Department of Space Jodhpur Rajasthan 342003 India krishi Vigyan kendra Central Arid Zone Research Institute Indian Council of Agricultural Research Bhuj Gujarat 370105 India

Over-exploitation of groundwater for irrigation can result in drastic reduction in groundwater level in Jodhpur district of western Rajasthan, India. In this study, we used the long-term trend analysis of seasonal groundwater level data to predict the future groundwater scenario in 33 villages of Jodhpur district, assessed the impact of water harvesting structures on groundwater recharge and explored the non-equilibrium between groundwater recharge and irrigation draft in the study area. Analysis of groundwater level data from 26 observation wells in 33 villages in the pre-monsoon period showed that groundwater level decreased continuously at the rate of 2.07 m/a. With this declining rate, most of the tube wells （including the well with the maximum depth of 193 m） are predicted to become completely dry by 2050. Behavior of temporal groundwater level data in the study period （from 2004 to 2012） can be explained by different geospatial maps, prepared using ArcGIS software. Statistical analysis of the interpolated maps showed that the area with the maximum positive groundwater recharge occupied 63.14% of the total area during 2010-2011 and the area with the maximum irrigation draft accounted for 56.21% of the total area during 2011-2012. Higher groundwater recharge is attributed to the increase in rainfall and the better aquifer condition. Spatial distribution for the changes of average groundwater recharge and draft （2008-2009 and 2011-2012） showed that 68.50% recharge area was in positive change and 45.75% draft area was in negative change. It was observed that the area of the irrigation draft exceeded that of the groundwater recharge in most of the years. In spite of the construction of several shallow water harvesting structures in 2009-2010, sandstone aquifer zones showed meager impact on groundwater recharge. The best-fit line for the deviation between average groundwater fluctuation due to recharge and irrigation draft with time can be represented by the polynom

关键词： geographic information system groundwater fluctuation water harvesting structures Jodhpur district

智能移动保温罩可控气氛热处理生产线研制及应用

在线全文

学校读者我要写书评

暂无评论

金属加工（热加工） 2024年第6期 29-34页

作者：吕辉李磊陈卫东西安航天发动机有限公司陕西西安710100

传统的井式炉温度波动大,容易造成局部过热或软点,在淬火转移过程中产品表面易产生氧化和脱碳。此外,作业人员受到的热辐射影响较大,淬火时产生的大量油烟造成环境污染较为严重等。大型移动保温罩可控气氛井式炉可替代传统的井式淬火炉... 详细信息

传统的井式炉温度波动大,容易造成局部过热或软点,在淬火转移过程中产品表面易产生氧化和脱碳。此外,作业人员受到的热辐射影响较大,淬火时产生的大量油烟造成环境污染较为严重等。大型移动保温罩可控气氛井式炉可替代传统的井式淬火炉,在提高生产效率和产品质量一致性、减少环境污染的同时,大幅减轻了作业人员劳动强度,促进了热处理车间绿色化和智能化发展。

关键词：井式炉渗碳可控气氛工艺热处理

Identification of the Exchange Coefficient from Indirect Data for a Coupled Continuum Pipe-Flow Model

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2014年第3期35卷 483-500页

作者： Xinming WU Philipp kGlER Shuai lU School of Mathematical Sciences Fudan University Institute for Applied Mathematics and Statistics University of Hohenheim Johann Radon Institute for Computational and Applied Mathematics (RICAM) Corresponding author. School of Mathematical Sciences Fudan University

Calibration and identification of the exchange effect between the karst aquifers and the underlying conduit network are important issues in order to gain a better understanding of these hydraulic systems. Based on a coupled continuum pipe-flow(CCPF for short) model describing flows in karst aquifers, this paper is devoted to the identification of an exchange rate function, which models the hydraulic interaction between the fissured volume(matrix) and the conduit, from the Neumann boundary data, i.e., matrix/conduit seepage velocity. The authors formulate this parameter identification problem as a nonlinear operator equation and prove the compactness of the forward mapping. The stable approximate solution is obtained by two classic iterative regularization methods, namely,the landweber iteration and levenberg-Marquardt method. Numerical examples on noisefree and noisy data shed light on the appropriateness of the proposed approaches.

关键词： CCPF model landweber iteration levenberg-Marquardt method

Gamma-Ray Bursts: Afterglows and Central Engines

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2001年第1期1卷 1-20页

作者： k.S.Cheng T.lu DepartmentofPhysics UniversityofHongKongPokfulamRoadHongKong DepartmentofAstronomy NanjingUniversit

Gamma-ray bursts (GRBs) are the most intense transient gamma-ray events in the sky; this, together with the strong evidence (the isotropic and inhomogeneous distribution of GRBs detected by BASTE) that they are located at cosmological distances, makes them the most energetic events ever known. For example, the observed radiation energies of some GRBs are equivalent to the total convertion into radiation of the mass energy of more than one solar mass. This is thousand times stronger than the energy of a supernova explosion. Some unconventional energy mechanism and extremely high conversion efficiency for these mysterious events are required. The discovery of host galaxies and association with supernovae at cosmological distances by the recently launched satellite of BeppoSAX and ground based radio and optical telescopes in GRB afterglow provides further support to the cosmological origin of GRBs and put strong constraints on their central engine. It is the aim of this article to review the possible central engines, energy mechanisms, dynamical and spectral evolution of GRBs, especially focusing on the afterglows in multi-wavebands.

关键词： gamma-rays: bursts - shock waves - ISM: jets and outflows- radiation mechanisms: non-thermal

Performance Analysis of Breast Cancer Detection Method Using ANFIS Classification Approach

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第1期44卷 501-517页

作者： k.Nagalakshmi Dr.S.Suriya Department of Computer Science and Engineering Sethu Institute of TechnologyVirudhunagar626115Tamil NaduIndia Department of Computer Science and Engineering PSG College of TechnologyCoimbatore641004Tamil NaduIndia

Breast cancer is one of the deadly diseases prevailing in *** detection and diagnosis might prevent the death *** diagnosis of breast cancer remains a significant challenge,and early diagnosis is essential to avoid the most severe manifestations of the *** existing systems have computational complexity and classification accuracy problems over various breast cancer *** order to overcome the above-mentioned issues,this work introduces an efficient classification and segmentation ***,there is a requirement for developing a fully automatic methodology for screening the cancer *** paper develops a fully automated method for breast cancer detection and segmenta-tion utilizing Adaptive Neuro Fuzzy Inference System(ANFIS)classification *** proposed technique comprises preprocessing,feature extraction,classifications,and segmentation ***,the wavelet-based enhancement method has been employed as the preprocessing *** texture and statistical features have been extracted from the enhanced ***,the ANFIS classification algorithm is used to classify the mammogram image into normal,benign,and malignant ***,morphological processing is performed on malignant mam-mogram images to segment cancer *** analysis and comparisons are made with conventional *** experimental result proves that the pro-posed ANFIS algorithm provides better classification performance in terms of higher accuracy than the existing algorithms.

关键词： Breast cancer detection segmentation classification malignant

Monte Carlo study of B-cell receptor clustering mediated by antigen crosslinking and directed transport

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

Cellular & Molecular Immunology 2011年第3期8卷 255-264页

作者： A Srinivas Reddy Philippos k Tsourkas Subhadip Raychaudhuri Department of Biomedical Engineering University of California DavisDavisUSA Biophysics Graduate Group University of California DavisDavisUSA Graduate Group in Applied Mathematics University of California DavisDavisUSA

It is known from experiments that in the presence of soluble antigen,B-cell receptors(BCRs)assemble into microclusters and then collect into a macrocluster known as a‘cap’.However,the mechanisms of BCR cluster formation during recognition of soluble antigens remain *** previous work,we demonstrated that effective intrinsic attractions among BCRs can lead to the formation of small microclusters of BCR *** effective intrinsic attractions could be caused by multivalent antigen binding,association with lipid rafts,or other biochemical *** the present study,we have developed and studied a Monte Carlo model of BCR clustering mediated by explicit binding and crosslinking of soluble bivalent *** crosslinking is shown to microcluster BCRs in an affinity-dependent manner and also in a biologically relevant timescale;however,antigen crosslinking alone does not appear to be sufficient for the formation of a single macrocluster of receptor *** show that directed transport of BCRs is needed to drive the formation of large *** constructed a simple model of directed transport,where BCR molecules diffuse towards the largest cluster or towards a random BCR microcluster,which results in a single macrocluster of receptor *** mechanisms for both types of directed transport are compared using network-based *** also develop and use appropriate network measures to analyze the effect of BCR and antigen concentration on BCR clustering,the stability of the formed clusters over time and the size of BCR–antigen crosslinked chains.

关键词： B-cell activation B-cell receptor cell signaling Monte Carlo simulation receptor clustering