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Articles 57331 - 57360 of 197987

Full-Text Articles in Engineering

Bifurcation Multi-Path Grooming Algorithm In Multi-Granularity Transport Network, Guangwei Lei, Xingwei Wang, Huang Min, Zhao Yue Jul 2020

Bifurcation Multi-Path Grooming Algorithm In Multi-Granularity Transport Network, Guangwei Lei, Xingwei Wang, Huang Min, Zhao Yue

Journal of System Simulation

Abstract: Recent years, with the rapid development and wide use of multi-granularity transport network, the pressure of backbone transmission network has been alleviated to some extent. However, the growing user demands to the Internet make network power consumption and bandwidth still face severe challenge. To deal with it, a bifurcation multi-path grooming algorithm was proposed and its associated bandwidth allocation strategy was devised to reduce power consumption and blocking rate. The proposed algorithm has been implemented by simulation and the evaluation results show that its performance is better than that of the benchmark.

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Research On Modeling Of Pump Model Based On Rbf Neural Network, Qinghui Wu, Qinghuan Shen, Xinjun Wang Jul 2020

Research On Modeling Of Pump Model Based On Rbf Neural Network, Qinghui Wu, Qinghuan Shen, Xinjun Wang

Journal of System Simulation

Abstract: On the basis of research on pump characteristics and pump model, a modeling method based on RBF neural network with K-means clustering algorithm was proposed. With k-means clustering algorithm the center vector and base width parameters, in which lie in the hidden layer, were optimized by input data sample. The weights between the hidden layer and the output layer were optimized by input-output data sample with least squares method. The neural network models of the pump characteristic and pump comprehensive model were separately trained and checked using the detected data. Its results suggest that reasonably choosing the number of …

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Recent Advances In Finite Element Simulation Of Machining Processes, Caixu Yu, Chunbin Cai, Huang Cui, Erliang Liu Jul 2020

Recent Advances In Finite Element Simulation Of Machining Processes, Caixu Yu, Chunbin Cai, Huang Cui, Erliang Liu

Journal of System Simulation

Abstract: Recently, the finite element simulation technology has been widely applied in machining simulation and has played an irreplaceable role in the investigations of machining mechanism of metal and composite materials, optimization of cutting parameters,etc. The importance of finite element simulation, commonly used software and material constitutive model were introduced. The latest research progress of the finite element simulation of cutting at home and abroad was summarized, including the simulation of chip morphology, the simulation of cutting force and cutting temperature, tool wear simulation, the machined surface integrity, simulation of the effect of multi-steps cutting on cutting process and finite …

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Analysis Of Sewer Network For Vijayanagar Layout Of Mysore City, Sankalp Mehta Jul 2020

Analysis Of Sewer Network For Vijayanagar Layout Of Mysore City, Sankalp Mehta

Manipal Institute of Technology, Manipal Theses and Dissertations

The main objective of the study is to design an underground drainage system for the residential layout of the Vijayanagar layout of the Mysore city. Sanitary Sewer Network is an essential part of society. The primary purpose of setting up a sewer system is to transport wastewater (from residential/ industrial area) and stormwater to the treatment plants so that it does not cause any problem to the public health. It was concluded that the Conventional Gravity Sewer System should not be adopted; instead, other technologies like Vacuum Sewer System or Pressure Sewer System should be adopted. A separate treatment plant …

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Field Investigation And Pile Design For Pier 28 Of Bhopal Metro Rail Project, Chetan Nema Jul 2020

Field Investigation And Pile Design For Pier 28 Of Bhopal Metro Rail Project, Chetan Nema

Manipal Institute of Technology, Manipal Theses and Dissertations

Before the start of the construction there are a lot of field investigations and tests that have to be performed on the surface for proper safety and stability of the elementary structure for the Urban Public Transport. The primary goal of any construction process is that the construction should be safe and technically optimized for everyone at every stage since all civil engineering project are done on the surface of the earth, Geotechnical Engineering has to play a very important role in maintaining the safety and security of the structure and hence the people using and constructing the structures. The …

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A Half-Yearly Newsletter Of The Department Of Mechatronics V3 S1 [July 2020], Chandrashekhar Bhat Dr Jul 2020

A Half-Yearly Newsletter Of The Department Of Mechatronics V3 S1 [July 2020], Chandrashekhar Bhat Dr

Faculty work

No abstract provided.

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A Half- Yearly E-Newsletter Of The Department Of Computer Science And Engineering, Manipal Institute Of Technology - Jul 2020, Ashalatha Nayak Jul 2020

A Half- Yearly E-Newsletter Of The Department Of Computer Science And Engineering, Manipal Institute Of Technology - Jul 2020, Ashalatha Nayak

Faculty work

No abstract provided.

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Hyper Attentive Res-Unet For Semantic Segmentation Of Brain Tumors, Dhiraj Maji, Prarthana Sigedar Jul 2020

Hyper Attentive Res-Unet For Semantic Segmentation Of Brain Tumors, Dhiraj Maji, Prarthana Sigedar

Manipal Institute of Technology, Manipal Theses and Dissertations

An abnormal development of tissues in the brain causes brain tumor, hence becoming a notable reason for morbidity and mortality. These tumors do not have a uniform structure and differ with respect to shape, intensity and size in each patient. The radiologists need to diagnose these tumors accurately to decide the best course of treatment for the patients. The manual segmentation requires a lot of expertise and skills, but still sometimes it can be erroneous. However, the automatic segmentation techniques of brain tumors help in precise diagnosis and subsequently devise a proper treatment. We present a new architecture called Hyper-Attentive …

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"Study On The Influence Of Vertical Geometrical Irregularities On The Time Period Of Rc Buildings", Sindhu V. N Jul 2020

"Study On The Influence Of Vertical Geometrical Irregularities On The Time Period Of Rc Buildings", Sindhu V. N

Manipal Institute of Technology, Manipal Theses and Dissertations

Design and build of earthquake resistant building or a structure requires us to understand the building’s response to an earthquake by performing either static or dynamic analysis. Static analysis is preferred for a regular building with more or less equal distribution of mass and stiffness among different floors of a building. The Indian standard code discourages the construction of irregular buildings but when unavoidable the code suggests to use dynamic analysis to understand the seismic response of the building. The construction of buildings with irregularity have become common and inevitable in the present urban scenario owing to space constraints and …

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Barriers To Implementation Of Lean Construction Practices In India, Krishna K. G Jul 2020

Barriers To Implementation Of Lean Construction Practices In India, Krishna K. G

Manipal Institute of Technology, Manipal Theses and Dissertations

Construction Industry is searching for newer and innovative methods to improve its functioning and be more viable in this highly competitive business world. One such technique which has proved its mettle is LEAN CONSTRUCTION. Lean Construction is a hybrid system which has been effectively used in manufacturing fields tweaked to the requirements of construction industry. With the focus of Waste Elimination, Effective utilization of Resources, Controlled activity and monitoring, Collaborative management methodology, implementation of Planning, monitoring and forecasting protocols the implantation has been proved to highly cost effective for the contractor thereby increasing the overall Margin , preventing Cost overruns …

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Construction Of Geopolymer Concrete Road, Ashutosh Rungta Jul 2020

Construction Of Geopolymer Concrete Road, Ashutosh Rungta

Manipal Institute of Technology, Manipal Theses and Dissertations

Geopolymer concrete is fly ash based alkali-activated concrete. Cement is eliminated by using fly ash and ground granulated blast-furnace slag. Water is used only to initiate the polymerization process and has no use after the initiation. The water gets expelled out once the concrete sets. There are no Indian standard codes for the mix design of geopolymer concrete. Hence, NTPC-NETRA and CSIR-Central Building Research Institute, Roorkee, have developed high strength fly ash based geopolymer concrete for the construction of the road as per IRC specifications. A Geopolymer concrete road stretch of 50 m length and 3 m width with 40 …

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Study On Stabilization Of Soil For Wind Turbine Foundation, Bhavana Suresh Jul 2020

Study On Stabilization Of Soil For Wind Turbine Foundation, Bhavana Suresh

Manipal Institute of Technology, Manipal Theses and Dissertations

Geotechnical investigation is carried out to provide necessary information required for designing structures on the soil. In this case, it involves designing foundations for Wind Turbine Generators. Wind Turbines are power generating machines of specified tower heights which consist of Nacelle (encasing gearbox, generators & transformers) and Hub holding the blades which rotate upon experiencing the wind action at the designated height to convert kinetic energy (wind) to electrical energy. This project is aimed at analyzing the soil conditions and check for the suitability of foundations designed for the designated WTG model. Previously, when the soil properties are identified to …

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Selective Inventory Management For A High Rise Residential Project, Mridul Nijhawan Jul 2020

Selective Inventory Management For A High Rise Residential Project, Mridul Nijhawan

Manipal Institute of Technology, Manipal Theses and Dissertations

The primary goal of any construction project is to ensure that good quality work is done at an optimized price. The cost of construction materials accounts for the majority of the expenses; therefore we need to have strict and viable control at these material expenses. To accomplish these objectives, we need to have strict screening and controlling of the material costs, quality and quantity requirements as per prerequisites of the task in the project. These instruments help in controlling material expenses and the quality and quantity of the material and guaranteeing the sufficient amount of material required at the site. …

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"Analysis And Design Of Multi-Storeyed Building Using Staad Pro", Sidharth . Jul 2020

"Analysis And Design Of Multi-Storeyed Building Using Staad Pro", Sidharth .

Manipal Institute of Technology, Manipal Theses and Dissertations

High Rise Building have to be designed with more flexibility. There is more chance of external excitation as these Structures are Vulnerable to Earthquake and wind. To protect these structures from such structural damages, seismic response factor is analyzed and the building is designed according to the results obtained. STAAD-Pro analysis is used. Limit State Design conforming to IS Code of Practice is adopted for design. The Primary Objective of this work is to create a structure that is earthquake resistant, using STAAD-PRO analysis.Also designing the components of the structure manually & Using excel program for the results obtained from …

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Planning, Analysis & Design Of A G+2 Residential Rcc Building, Path Sharma Jul 2020

Planning, Analysis & Design Of A G+2 Residential Rcc Building, Path Sharma

Manipal Institute of Technology, Manipal Theses and Dissertations

Concrete is the second most used material by man after water. It is used in nearly every type of construction. The most common use of concrete is in construction of a residential building. This project involves the planning, analysis & design of a RCC building. In earlier days, building design was done by hand, using manual calculations and hand drafting. It would take several days and even months for an architect to design, for an engineer to analyze & for a drafter to detail the various components. But today most of the work is done with the help of software …

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Understanding And Analyzing Major Activities Involved In The Construction Of Skyscraper, Rachit Pamecha Jul 2020

Understanding And Analyzing Major Activities Involved In The Construction Of Skyscraper, Rachit Pamecha

Manipal Institute of Technology, Manipal Theses and Dissertations

As the population of world increases at an unprecedented rate so does their basic need of a shelter. This would lead to an acute shortage of land for everyone to fit in and skyscrapers help us overcome this problem very efficiently. The main reason that people build skyscrapers is because they are very convenient. They serve to fit a lot of floor space in a comparatively small amount of ground surface because of their immense height. This project deals with the construction techniques and methodology required to overcome the difficulties faced during the construction of skyscrapers. It also provides data …

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Analysis And Prediction Of Peak Surface Runoff Of Bda Planning District-215 Mathikere, Bengaluru North, Sridarshan H. S Jul 2020

Analysis And Prediction Of Peak Surface Runoff Of Bda Planning District-215 Mathikere, Bengaluru North, Sridarshan H. S

Manipal Institute of Technology, Manipal Theses and Dissertations

Runoff plays a very important role in modern urban planning. When authorities consider various developmental infrastructure and services, runoff is one important factor to be considered in the planning phase to do away with the ill effects of runoff in a future time period. Runoff can be defined as the amount of water due to rainfall that makes its way through rooftops, pavements, roads and open ground finally to form streams. These streams due to excess runoff may result in catastrophic disasters like landslides, collapse of infrastructure, etc. The determination of amount of runoff was calculated using the combine efforts …

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Inter-Slice Compression And Reconstruction Of Glioma Magnetic Resonance Imaging (Mri) Data Using Encoder-Decoder Neural Networks, Gavin Michael Karr Jul 2020

Inter-Slice Compression And Reconstruction Of Glioma Magnetic Resonance Imaging (Mri) Data Using Encoder-Decoder Neural Networks, Gavin Michael Karr

Graduate Theses - Electrical and Computer Engineering

Magnetic Resonance Imaging (MRI) scans of patients with brain tumors are an important source of pre-surgical medical information. These three-dimensional image volumes can be represented as a stack of two-dimensional image slices. The objective of this thesis is to compress the size of these image volumes by removing the odd-numbered slices and reconstruct the image volume using an encoder-decoder convolutional neural network. This neural network architecture is based on a modified form of the U-net segmentation network, which has been adjusted to allow for multiple image inputs and to support a network capable of generating new image slices. A novel …

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Interdisciplinary Education Outreach With Traffic Sensor Build Kits, Sarah V. Hernandez, Mariah B. Crews Jul 2020

Interdisciplinary Education Outreach With Traffic Sensor Build Kits, Sarah V. Hernandez, Mariah B. Crews

Civil Engineering Teaching and Learning

The goal of this project was to attract K-12 students to transportation engineering careers through STEM outreach programs. To accomplish this goal, the object of the project was to design and implement maritime freight oriented educational outreach activities centered on traffic sensing technologies for middle, high school, and first-year college students. In MarTREC Project 5011 (Evaluating the Performance of Intermodal Connectors), the research team designed a low-cost, easily implementable LiDAR and Bluetooth sensor bundle that was capable of detecting, characterizing, and tracking freight trucks as they traveled to and from inland waterway port areas. The sensor provided data necessary to …

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Western Kentucky University Stormwater Utility Survey 2020, Warren Campbell Jul 2020

Western Kentucky University Stormwater Utility Survey 2020, Warren Campbell

SEAS Faculty Publications

No abstract provided.

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Ultrasonic Coda Wave Comparison For Quality Control Of Manufactured Parts: Proof Of Feasibility, Alexei Marin-Cortes Jul 2020

Ultrasonic Coda Wave Comparison For Quality Control Of Manufactured Parts: Proof Of Feasibility, Alexei Marin-Cortes

Civil and Environmental Engineering Master's Project Reports

Manufactured parts are a staple of modern urban life, visible in homes (e.g., kitchen appliances), offices (e.g., printers), the automobile and aerospace industries (e.g., body parts), and more. This M.S. project intended to determine whether ultrasonic testing could be used in a simple and rapid manner to perform quality control of manufactured parts. Ultrasonic testing is employed for this purpose using two surface-coupled transducers, one being a transmitter and the other one a receiver. An ultrasonic pulse, which is generated by the transmitting transducer, propagates through the part, collecting information about material and geometry, as well as potential unwanted features. …

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Greentpu: Predictive Design Paradigm For Improving Timing Error Resilience Of A Near-Threshold Tensor Processing Unit, Pramesh Pandey, Prabal Basu, Koushik Chakraborty, Sanghamitra Roy Jul 2020

Greentpu: Predictive Design Paradigm For Improving Timing Error Resilience Of A Near-Threshold Tensor Processing Unit, Pramesh Pandey, Prabal Basu, Koushik Chakraborty, Sanghamitra Roy

Electrical and Computer Engineering Faculty Publications

The emergence of hardware accelerators has brought about several orders of magnitude improvement in the speed of the deep neural-network (DNN) inference. Among such DNN accelerators, the Google tensor processing unit (TPU) has transpired to be the best-in-class, offering more than 15\times speedup over the contemporary GPUs. However, the rapid growth in several DNN workloads conspires to escalate the energy consumptions of the TPU-based data-centers. In order to restrict the energy consumption of TPUs, we propose GreenTPU - a low-power near-threshold (NTC) TPU design paradigm. To ensure a high inference accuracy at a low-voltage operation, GreenTPU identifies the patterns in …

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Noisy Importance Sampling Actor-Critic: An Off-Policy Actor-Critic With Experience Replay, Miriam A M Capretz, Norman Tasfi Jul 2020

Noisy Importance Sampling Actor-Critic: An Off-Policy Actor-Critic With Experience Replay, Miriam A M Capretz, Norman Tasfi

Electrical and Computer Engineering Publications

This paper presents Noisy Importance Sampling Actor-Critic (NISAC), a set of empirically validated modifications to the advantage actor-critic algorithm (A2C), allowing off-policy reinforcement learning and increased performance. NISAC uses additive action space noise, aggressive truncation of importance sample weights, and large batch sizes. We see that additive noise drastically changes how off-sample experience is weighted for policy updates. The modified algorithm achieves an increase in convergence speed and sample efficiency compared to both the on-policy actor-critic A2C and the importance weighted off-policy actor-critic algorithm. In comparison to state-of-the-art (SOTA) methods, such as actor-critic with experience replay (ACER), NISAC nears the …

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Examining The Effects Of Reducing The Cement Content Of Portland Cement Concrete Pavement, Bryan Casillas Jul 2020

Examining The Effects Of Reducing The Cement Content Of Portland Cement Concrete Pavement, Bryan Casillas

Graduate Theses and Dissertations

Portland cement is a significant component in a concrete mixture. For concrete used in portland cement concrete pavement (PCCP), the Arkansas Department of Transportation (ARDOT) specifies a minimum cementitious material content of 564 lb/yd3 and a maximum water-cementitious material ratio of 0.45. Prior research conducted at the University of Arkansas, TRC 0603, indicated concrete mixtures used in five bridge decks throughout Arkansas achieved the required 28-day strength at seven days, and the measured compressive strength at 28 days was 30% greater than required. The use of high strength concrete in pavements throughout the state can increase cracking and consequently reduce …

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Quantifying Workability, Compactability, And Cohesion Gain Of Asphalt Emulsion Cold In-Place Recycling, Sadie Casillas Jul 2020

Quantifying Workability, Compactability, And Cohesion Gain Of Asphalt Emulsion Cold In-Place Recycling, Sadie Casillas

Graduate Theses and Dissertations

To maximize the life and quality of a pavement, proper maintenance and rehabilitation are essential. Strategies for pavement rehabilitation with many sustainable benefits are pavement recycling. This dissertation focuses on two types of in-situ pavement recycling: Cold in-place recycling (CIR) stabilized with asphalt emulsion and full depth reclamation (FDR) stabilized with asphalt emulsion or foamed asphalt. One white paper (Chapter 2), two accepted peer reviewed journal articles (Chapters 3 and 4), and one submitted peer reviewed journal article (Chapter 5) are presented in this document to create better understanding of the unique material characterization of asphalt emulsion cold recycled materials, …

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Verifying The Calcium Oxychloride Threshold In Cementitious Pastes, Fatoumata Traore Jul 2020

Verifying The Calcium Oxychloride Threshold In Cementitious Pastes, Fatoumata Traore

Graduate Theses and Dissertations

Calcium oxychloride (CAOXY) formation is a serious deterioration mechanism known to cause joint damage in concrete pavements. CAOXY is the product of a chemical reaction between calcium chloride (CaCl2) or magnesium chloride (MgCl) deicing salts and calcium hydroxide in the cementitious matrix. Currently, the accepted CAOXY threshold at which deterioration is mitigated in cementitious paste is 15 g/100 g paste (15 oz/100 oz paste); however, this limit was developed using flexural strength testing. For this investigation, the current threshold was evaluated using compressive strength and mass change over time in paste specimens exposed to CaCl2. Fly ash is used to …

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Commodity-Based Freight Activity On Inland Waterways Through The Fusion Of Public Datasets For Multimodal Transportation Planning, Magdalena I. Asborno Jul 2020

Commodity-Based Freight Activity On Inland Waterways Through The Fusion Of Public Datasets For Multimodal Transportation Planning, Magdalena I. Asborno

Graduate Theses and Dissertations

Within the U.S., the 18.6 billion tons of goods currently moved along the multimodal transportation system are expected to grow 51% by 2045. Most of those goods are transported by roadways. However, several benefits can be realized by shippers and consumers by shifting freight to more efficient modes, such as inland waterways, or adopting a multimodal scheme. To support such freight growth sustainably and efficiently, federal legislation calls for the development of plans, methods, and tools to identify and prioritize future multimodal transportation infrastructure needs. However, given the historical mode-specific approach to freight data collection, analysis, and modeling, challenges remain …

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Severe Weather In Nebraska: Impacts On Nonmetropolitan Nebraskans. 2020 Nebraska Rural Poll Results, Rebecca J. Vogt, Cheryl Burkhart-Kriesel, Bradley Lubben, L. J. Mcelravy, Timothy Meyer, Steve Schulz, Jason L. Weigle Jul 2020

Severe Weather In Nebraska: Impacts On Nonmetropolitan Nebraskans. 2020 Nebraska Rural Poll Results, Rebecca J. Vogt, Cheryl Burkhart-Kriesel, Bradley Lubben, L. J. Mcelravy, Timothy Meyer, Steve Schulz, Jason L. Weigle

Rural Futures Institute: Publications

In March 2019, a bomb cyclone produced a historic blizzard as well as flooding that impacted many counties in Nebraska. Given that, did rural Nebraskans experience extreme weather events or natural disasters in 2019? To what extent were they harmed by these weather events? What personal impacts did they experience? How concerned are they about weather events? This paper provides a detailed analysis of these questions. This report details 1,979 responses to the 2020 Nebraska Rural Poll, the 25th annual effort to understand rural Nebraskans’ perceptions. Respondents were asked a series of questions about weather events. Comparisons are made among …

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A Novel Tri-Band Reconfigurable Microstrip Patch Antenna, Wen Tao Li, Meng Wei, Bahareh Badamchi, Harish Subbaraman, Xiaowei Shi Jul 2020

A Novel Tri-Band Reconfigurable Microstrip Patch Antenna, Wen Tao Li, Meng Wei, Bahareh Badamchi, Harish Subbaraman, Xiaowei Shi

Electrical and Computer Engineering Faculty Publications and Presentations

In this paper, a novel tri-band reconfigurable patch antenna with simple structure is presented. By changing the on-off state of only two PIN diodes, the antenna can operate in three bands, namely X-band, Ku-band, and Ka-band. The overall size of the antenna is 0.24λL × 0.5λL × 0.019λL, where λL is the free-space wavelength of the lowest operating frequency. A prototype is fabricated and measured to verify the design. The measurement results are in good agreement with the simulation results, which indicate that the proposed antenna can be flexibly switched between three …

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Continuous Learning In A Single-Incremental-Task Scenario With Spike Features, Ruthvik Vaila, John Chiasson, Vishal Saxena Jul 2020

Continuous Learning In A Single-Incremental-Task Scenario With Spike Features, Ruthvik Vaila, John Chiasson, Vishal Saxena

Electrical and Computer Engineering Faculty Publications and Presentations

Deep Neural Networks (DNNs) have two key deficiencies, their dependence on high precision computing and their inability to perform sequential learning, that is, when a DNN is trained on a first task and the same DNN is trained on the next task it forgets the first task. This phenomenon of forgetting previous tasks is also referred to as catastrophic forgetting. On the other hand a mammalian brain outperforms DNNs in terms of energy efficiency and the ability to learn sequentially without catastrophically forgetting. Here, we use bio-inspired Spike Timing Dependent Plasticity (STDP) in the feature extraction layers of the network …

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