Modelling and Simulation in Engineering最新文献_第9页

Compressive Covariance Sensing-Based Power Spectrum Estimation of Real-Valued Signals Subject to Sub-Nyquist Sampling 基于压缩协方差感知的亚奈奎斯特采样实值信号功率谱估计

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-04-27 DOI: 10.1155/2021/5511486

N. Alwan

{"title":"Compressive Covariance Sensing-Based Power Spectrum Estimation of Real-Valued Signals Subject to Sub-Nyquist Sampling","authors":"N. Alwan","doi":"10.1155/2021/5511486","DOIUrl":"https://doi.org/10.1155/2021/5511486","url":null,"abstract":"In this work, an estimate of the power spectrum of a real-valued wide-sense stationary autoregressive signal is computed from sub-Nyquist or compressed measurements in additive white Gaussian noise. The problem is formulated using the concepts of compressive covariance sensing and Blackman-Tukey nonparametric spectrum estimation. Only the second-order statistics of the original signal, rather than the signal itself, need to be recovered from the compressed signal. This is achieved by solving the resulting overdetermined system of equations by application of least squares, thereby circumventing the need for applying the complicated - minimization otherwise required for the reconstruction of the original signal. Moreover, the signal need not be spectrally sparse. A study of the performance of the power spectral estimator is conducted taking into account the properties of the different bases of the covariance subspace needed for compressive covariance sensing, as well as different linear sparse rulers by which compression is achieved. A method is proposed to benefit from the possible computational efficiency resulting from the use of the Fourier basis of the covariance subspace without considerably affecting the spectrum estimation performance.","PeriodicalId":45541,"journal":{"name":"Modelling and Simulation in Engineering","volume":"27 1","pages":"1-9"},"PeriodicalIF":3.2,"publicationDate":"2021-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83651894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Optimization of AL6061-T6 Tube End Forming Process Using Response Surface Method 响应面法优化AL6061-T6管端部成形工艺

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-04-10 DOI: 10.1155/2021/5532276

A. Shaaban, A. Elsabbagh

引用次数: 1

Cellular Automata Model for Mixed Traffic Flow with Lane Changing Behavior 具有变道行为的混合交通流元胞自动机模型

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-04-01 DOI: 10.1155/2021/9142790

Devaraj Hanumappa, Parthasarathy Ramachandran

引用次数: 5

Model-Based Hardware-Software Codesign of ECT Digital Processing Unit 基于模型的ECT数字处理单元软硬件协同设计

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-03-30 DOI: 10.1155/2021/4757464

Atef Allam, W. Deabes

{"title":"Model-Based Hardware-Software Codesign of ECT Digital Processing Unit","authors":"Atef Allam, W. Deabes","doi":"10.1155/2021/4757464","DOIUrl":"https://doi.org/10.1155/2021/4757464","url":null,"abstract":"Image reconstruction algorithm and its controller constitute the main modules of the electrical capacitance tomography (ECT) system; in order to achieve the trade-off between the attainable performance and the flexibility of the image reconstruction and control design of the ECT system, hardware-software codesign of a digital processing unit (DPU) targeting FPGA system-on-chip (SoC) is presented. Design and implementation of software and hardware components of the ECT-DPU and their integration and verification based on the model-based design (MBD) paradigm are proposed. The inner-product of large vectors constitutes the core of the majority of these ECT image reconstruction algorithms. Full parallel implementation of large vector multiplication on FPGA consumes a huge number of resources and incurs long combinational path delay. The proposed MBD of the ECT-DPU tackles this problem by crafting a parametric segmented parallel inner-product architecture so as to work as the shared hardware core unit for the parallel matrix multiplication in the image reconstruction and control of the ECT system. This allowed the parameterized core unit to be configured at system-level to tackle large matrices with the segment length working as a design degree of freedom. It allows the trade-off between performance and resource usage and determines the level of computation parallelism. Using MBD with the proposed segmented architecture, the system design can be flexibly tailored to the designer specifications to fulfill the required performance while meeting the resources constraint. In the linear-back projection image reconstruction algorithm, the segmentation scheme has exhibited high resource saving of 43% and 71% for a small degradation in a frame rate of 3% and 14%, respectively.","PeriodicalId":45541,"journal":{"name":"Modelling and Simulation in Engineering","volume":"39 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73738251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Study on the Dynamic Response of Landslide Subjected to Earthquake by the Improved DDA Method 地震作用下滑坡动力响应的改进DDA方法研究

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-03-26 DOI: 10.1155/2021/6637939

Xiu-Li Zhang, Bingsen Xie, Hao Wang, Y. Jiao

{"title":"Study on the Dynamic Response of Landslide Subjected to Earthquake by the Improved DDA Method","authors":"Xiu-Li Zhang, Bingsen Xie, Hao Wang, Y. Jiao","doi":"10.1155/2021/6637939","DOIUrl":"https://doi.org/10.1155/2021/6637939","url":null,"abstract":"Majiagou landslide, a major ancient landslide in Three Gorges Reservoir region, is located in the high earthquake area of southwest China. The 2013 Badong earthquake caused an obvious deformation of landslide monitored by the sliding inclinometer. A strong earthquake may induce the reactivation of ancient landslide. So, it is necessary to research the seismic dynamic response of Majiagou landslide. For this purpose, discontinuous deformation analysis (DDA), improved by introducing the artificial joint and viscous boundary, is applied in this study. The displacements at monitoring points caused by Badong earthquake are calculated and compared with the field data, verifying the numerical method and model. Further, a strong earthquake with the peak acceleration of 1 g is assumed to act on the landside, the initiation and evolution process of landslide is simulated, and the movement features of landslide are discussed. The dynamic failure of landslide and the local amplification of seismic wave can be embodied, indicating that the improved DDA provides an alternative approach for analyzing the seismic dynamic response of jointed rock.","PeriodicalId":45541,"journal":{"name":"Modelling and Simulation in Engineering","volume":"28 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2021-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89772886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Numerical High-Order Model for the Nonlinear Elastic Computation of Helical Structures 螺旋结构非线性弹性计算的高阶数值模型

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-03-18 DOI: 10.1155/2021/6655909

Fatima Boussaoui, H. Lahmam, B. Braikat

引用次数: 2

Modelling Sustainable Development Aspects within Inventory Supply Strategies 在库存供应策略中模拟可持续发展方面

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-03-17 DOI: 10.1155/2021/5232814

Gladys Bonilla-Enriquez, Patricia Cano-Olivos, Liqun Peng, Weihua Gan, J. Martínez-Flores, Diana Sánchez-Partida

引用次数: 4

Energy Analysis of Commercial Buildings Using Artificial Neural Network 基于人工神经网络的商业建筑能耗分析

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-03-11 DOI: 10.1155/2021/8897443

F. Uba, Holali Kwami Apevienyeku, F. D. Nsiah, Alex Akorli, Stephen Adjignon

{"title":"Energy Analysis of Commercial Buildings Using Artificial Neural Network","authors":"F. Uba, Holali Kwami Apevienyeku, F. D. Nsiah, Alex Akorli, Stephen Adjignon","doi":"10.1155/2021/8897443","DOIUrl":"https://doi.org/10.1155/2021/8897443","url":null,"abstract":"Energy consumption in buildings especially in offices is alarming and prompts the desire for more energy analysis work to be done in testing models that can estimate the energy situation of commercial buildings, and the key contributing factors are based on human factors, work load, and weather variables like solar radiation and temperature. In the research, the administration block of the University of Energy and Natural Resources, Ghana, was selected and modeled for energy analysis using SketchUp. Daily energy consumption of the building was generated with EnergyPlus indicating the electricity consumption of the block for the year 2018 for which 68.7% was used by equipment in the block, 26.98% on cooling, and the rest on lighting. The Artificial Neural Network model which had weather variable and days as input neurons and cooling, lighting, equipment, and total building electricity consumption as output neurons was modeled in MATLAB. The model after training had \u0000 \u0000 R\u0000 \u0000 values for training, validation, and testing to be 0.999 and validation performance of \u0000 \u0000 1.7\u0000 ∗\u0000 \u0000 \u0000 10\u0000 \u0000 \u0000 −\u0000 04\u0000 \u0000 \u0000 \u0000 . It was able to predict the energy consumption for lighting, cooling, and equipment very close to the results with minimal. The results from the ANN model prediction were compared with the EnergyPlus simulations. The maximum deviation profile for the following parameters (lighting, cooling, and equipment) is 13%, 8%, and 4%, respectively. The large difference in the lighting and cooling is the difficulty involved in predicting human behaviour and weather conditions. The least value recorded for the equipment is due to its independence on external factors.","PeriodicalId":45541,"journal":{"name":"Modelling and Simulation in Engineering","volume":"7 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2021-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83809035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Flexible Temporary Shield in Soft and Sensitive Clay: 3D FE Modelling of Experimental Field Test 软敏感黏土柔性临时盾构:现场试验三维有限元模拟

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-02-25 DOI: 10.1155/2021/6626750

Miah Alam, O. Chaallal, B. Galy

引用次数: 4

Qualitative Precipitation Estimation from Satellite Data Based on Distributed Domain-Specific Architecture 基于分布式领域特定架构的卫星数据定性降水估计

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-02-16 DOI: 10.1155/2021/8827900

S. Prongnuch, T. Wiangtong, S. Sitjongsataporn

引用次数: 0