Open Access. Powered by Scholars. Published by Universities.®

Operations Research, Systems Engineering and Industrial Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

2020

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 751 - 780 of 1941

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

Research And Development Of Eicas System Emulator Based On Idata, Baoming Zhao, Hongshu Cheng, Cancan Liu, Jiying Li Aug 2020

Research And Development Of Eicas System Emulator Based On Idata, Baoming Zhao, Hongshu Cheng, Cancan Liu, Jiying Li

Journal of System Simulation

Abstract: Some modeling tools can't design simulation instruments efficiently and conveniently such as OpenGL, etc. A cockpit display development tool of IData was worked in which has graphical user interface and could develop a system easily and rapidly. IData is a method of designing maps and pictures, it can respond variables of application and controlling events in real time and develop graphical interface by clicking on the menu. So IData can reduce the time of graphic development and integration in simulation. In order to render maps in real time, IData used a powerful graphic editor to model for instruments, and …

Go to article

Diagnosis Of Aircraft Control Surface Fault Based On Semi-Physical Simulation, Yunlong Li, Xia Jie, Zifang Shi Aug 2020

Diagnosis Of Aircraft Control Surface Fault Based On Semi-Physical Simulation, Yunlong Li, Xia Jie, Zifang Shi

Journal of System Simulation

Abstract: The aircraft control surface defaults of rudders were mainly divided into jam fault and damage fault. On the basis of the relationship between motor toque and hinge moment, a new method of using the motor voltage was proposed to detect the control surface'faults of rudder. And the method could detect the damage degree of the faults. Torque motor was used to play the role of hinge moment. And the new method was simulated by Semi-Physical system which is consisted of dSPACE system, PC and simulated rudder actuator. The results show that, the damage faults and jam faults can be …

Go to article

Analyzing The Fractal Dimension Of Various Musical Pieces, Nathan Clark Aug 2020

Analyzing The Fractal Dimension Of Various Musical Pieces, Nathan Clark

Industrial Engineering Undergraduate Honors Theses

One of the most common tools for evaluating data is regression. This technique, widely used by industrial engineers, explores linear relationships between predictors and the response. Each observation of the response is a fixed linear combination of the predictors with an added error element. The method is built on the assumption that this error is normally distributed across all observations and has a mean of zero. In some cases, it has been found that the inherent variation is not the result of a random variable, but is instead the result of self-symmetric properties of the observations. For data with these …

Go to article

Allocation Of Public Resources: Bringing Order To Chaos, Lance Clifner Aug 2020

Allocation Of Public Resources: Bringing Order To Chaos, Lance Clifner

Computational and Data Sciences (PhD) Dissertations

Science Olympiad (SO) is a team-based academic competition involving multiple subject areas (Events) with arcane rules governing the team composition. Add to the mix parental contention over which student(s) get on the “All-Star” team, and you have a potentially explosive situation. This project brings order and logic to school-based SO programs and defuses tense milestones through the implementation of an institutional structure that: assigns students to Events based on solicited student preferences for the Events, collects objective student performance data, composes competitive teams based on student performance (aka “Moneyball”), and brings transparency to the Team Selection process through crowdsourcing. The …

Go to article

A Biomechanical Approach To Investigate The Effects On The Lumbosacral Joint, Pelvis, And Knee Joint While Of Carrying Asymmetrical Loads, During Ground Walking., Tomal Das Aug 2020

A Biomechanical Approach To Investigate The Effects On The Lumbosacral Joint, Pelvis, And Knee Joint While Of Carrying Asymmetrical Loads, During Ground Walking., Tomal Das

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Spinal pain is reasonably considered among the expensive and impairing problems critically disturbing the health of individuals, especially the workforce, in industrially developed countries (Steele et al., 2003). The pain adversely affecting the lumbar region or pelvis is typically considered as low back pain. As per the National Institute of Neurological Disorder and Stroke, around 80 percent of grown-ups encounter spinal pain eventually in the course of their lifetime. The possible risk factors include age, fitness level, genetics, weight gain, occupational risk factors such as having a job that expects someone to do lifting, carrying, pushing, pulling, distorting the spinal …

Go to article

A Two-Stage Stochastic Programming Model For Enhancing Seismic Resilience Of Water Pipe Networks, Azam Boskabadi Aug 2020

A Two-Stage Stochastic Programming Model For Enhancing Seismic Resilience Of Water Pipe Networks, Azam Boskabadi

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Earthquakes are sudden and inevitable disasters that can cause enormous losses and suffering, and having accessible water is critically important for earthquake victims. To address this challenge, utility managers do preventive procedures on water pipes periodically to withstand future earthquake damage. The existing seismic vulnerability models usually consider simple methods to find the pipes to rehabilitate with highest priority. In this research, we develop an optimization approach to determine which water pipes to rehabilitate subject to a limited budget to achieve highest network serviceability after a disaster. We propose a two-stage stochastic mixed integer nonlinear program (MINLP). The MINLP model …

Go to article

A New Method To Estimate The Impact On The L5/Si Spinal Disc From Speed Lifting Of Unstable Loads, Asymmetrically, Suhaib Al-Lababidi Aug 2020

A New Method To Estimate The Impact On The L5/Si Spinal Disc From Speed Lifting Of Unstable Loads, Asymmetrically, Suhaib Al-Lababidi

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Background: The most significant causes of lower back injuries at work are probably from manual lifting activities. Lifting unstable loads pose a significant strain to the lower back and can cause debilitating lumbar spine injuries. The primary function of the vertebral column is to support the upper body. The L5/S1 disc junction located between the lumbar and the sacral regions of the vertebral column is the most critical joint in spine with respect to lifting strain. Because of its position and the amount of upper body weight it handles, it is particularly vulnerable to misalignment, wear and tear, and injury.Lifting …

Go to article

Application Of Optimized Laser Surface Re-Melting Process On Selective Laser Melted 316l Stainless Steel Inclined Parts, Jafar Ghorbani, Jianzhi Li, Anil K. Srivastava Aug 2020

Application Of Optimized Laser Surface Re-Melting Process On Selective Laser Melted 316l Stainless Steel Inclined Parts, Jafar Ghorbani, Jianzhi Li, Anil K. Srivastava

Manufacturing & Industrial Engineering Faculty Publications

Lower surface quality of selective laser melting (SLM) manufactured parts remains to be a key shortcoming particularly for high performance functional components. In this paper, the authors utilized Box–Behnken methodology to explore the effect of laser surface re-melting process parameters. The process parameters are:laser power, laser exposure time, laser point distance, and shell layer thickness. The experiments were conducted using Renishaw AM-250 machine. SLM manufactured parts with inclination of 45˚ up-skin were treated with a given surface roughness using laser surface re-melting (LSR). The optimization of process parameters was conducted using response surface methodology and the validation tests was carried …

Go to article

A Framework For Using Fused Image Data In Statistical Process Control, Shengfeng Chen Aug 2020

A Framework For Using Fused Image Data In Statistical Process Control, Shengfeng Chen

Dissertations

The use of image data in manufacturing quality control systems has grown rapidly over the years. Technological advancements in imaging devices (e.g., digital cameras, x-ray scanners, infrared cameras) have provided convenient and cost-effective ways to obtain images. These images contain important quality features (e.g., textures and product dimensions) that can be used to monitor, diagnose, predict, and control manufacturing processes. A key tool for monitoring images is statistical process control charts. Integrating images of parts to detect process shifts can significantly improve a quality systems efficiency. Unfortunately, appropriate techniques that take full advantage of data-rich images for control charting are …

Go to article

A Framework For Adaptive Capacity In Complex Systems, Abdulrahman Alfaqiri Aug 2020

A Framework For Adaptive Capacity In Complex Systems, Abdulrahman Alfaqiri

Engineering Management & Systems Engineering Theses & Dissertations

Complex systems are characterized by their high level of inter-connectivity, ambiguity, and emergence. Therefore, a failure in one element of a system (e.g. cyber layer) due to external or internal disturbances can lead to a cascade effect that may influence all elements of the system. Consequently, the complex system will not be able to perform its functional performance. Threats related to complex systems are very dynamic, fast, complex and damage can be severe. Thus, to respond to the dynamic and unpredictable nature of these threats, complex systems need to be highly adaptive to survive and thrive in the face of …

Go to article

Human Error In Commercial Fishing Vessel Accidents: An Investigation Using The Human Factors Analysis And Classification System, Peter J. Zohorsky Aug 2020

Human Error In Commercial Fishing Vessel Accidents: An Investigation Using The Human Factors Analysis And Classification System, Peter J. Zohorsky

Engineering Management & Systems Engineering Theses & Dissertations

The commercial fishing industry is frequently described as one of the most hazardous occupations in the United States. The objective, to maximize the catch, is routinely challenged by a variety of elements due to the environment, the vessel, the crew, and several external considerations and how they interact with each other. The analysis of fishing vessel accidents can be complicated due to the diverse nature of the industry, including the species caught, the type and size of boat that is employed, how far travelled from their homeport, and the adequacy of the support organizations ensuring safe and uninterrupted operations. This …

Go to article

A Quest To Identify The Emerging Leadership Skills In Vuca World And Investigation Of Their Applications In Various Organizational Levels And Security Environments, Ali Can Kucukozyigit Aug 2020

A Quest To Identify The Emerging Leadership Skills In Vuca World And Investigation Of Their Applications In Various Organizational Levels And Security Environments, Ali Can Kucukozyigit

Engineering Management & Systems Engineering Theses & Dissertations

The theoretical framework of this research is based on “skills approach” that emphasizes the leader’s capabilities (skills, knowledge, and capabilities) that can be learned, taught, and fostered. VUCA (Volatile, Uncertain, Complex and Ambiguous) environment is chosen as the focal point of this research as the leadership skills are extracted from studies referring to such environment. Although the acronym is dominantly used in management and business domains, the military also uses it to describe the complex operational environments like in Iraq and Afghanistan. The identification of individual leadership skills and delivering the right skill, at the right time, to the right …

Go to article

Cyber-Assets At Risk (Car): Monetary Impact Of Personally Identifiable Information Data Breaches On Companies, Omer Ilker Poyraz Aug 2020

Cyber-Assets At Risk (Car): Monetary Impact Of Personally Identifiable Information Data Breaches On Companies, Omer Ilker Poyraz

Engineering Management & Systems Engineering Theses & Dissertations

Cyber-systems provide convenience, ubiquity, economic advantage, and higher efficiency to both individuals and organizations. However, vulnerabilities of the cyber domain also offer malicious actors with the opportunities to compromise the most sensitive information. Recent cybersecurity incidents show that a group of hackers can cause a massive data breach, resulting in companies losing competitive advantage, reputation, and money. Governments have since taken some actions in protecting individuals and companies from such crime by authorizing federal agencies and developing regulations. To protect the public from losing their most sensitive records, governments have also been compelling companies to follow cybersecurity regulations. If companies …

Go to article

A Core Reference Hierarchical Primitive Ontology For Electronic Medical Records Semantics Interoperability, Ziniya Zahedi Aug 2020

A Core Reference Hierarchical Primitive Ontology For Electronic Medical Records Semantics Interoperability, Ziniya Zahedi

Engineering Management & Systems Engineering Theses & Dissertations

Currently, electronic medical records (EMR) cannot be exchanged among hospitals, clinics, laboratories, pharmacies, and insurance providers or made available to patients outside of local networks. Hospital, laboratory, pharmacy, and insurance provider legacy databases can share medical data within a respective network and limited data with patients. The lack of interoperability has its roots in the historical development of electronic medical records. Two issues contribute to interoperability failure. The first is that legacy medical record databases and expert systems were designed with semantics that support only internal information exchange. The second is ontological commitment to the semantics of a particular knowledge …

Go to article

Mathematical Models And Analysis For Demand Side Management In Residential Electricity Distribution Networks., Arnab Roy Aug 2020

Mathematical Models And Analysis For Demand Side Management In Residential Electricity Distribution Networks., Arnab Roy

Electronic Theses and Dissertations

Development of smart grids along with communication technologies have led to the increased attention and adoption of demand side management (DSM) in the residential sector. Among various DSM schemes, demand response (DR) is a market- based mechanism to shave peak electricity consumption at the system level. In the past decade, the academia has seen a growing literature studying load management methodologies for residential consumers. A typical demand response program has three important facets: the energy cost, comfort of the consumers and overall system efficiency. In this dissertation, we investigate and develop models for effective load control to minimize energy cost …

Go to article

Application Of Classification In Machine Learning: An Analysis Of Highway-Rail Grade Crossing Systems Safety, Christopher John Helmer Cox Aug 2020

Application Of Classification In Machine Learning: An Analysis Of Highway-Rail Grade Crossing Systems Safety, Christopher John Helmer Cox

Theses and Dissertations

Highway-rail grade crossing accidents are the second leading cause of fatalities within the railway transportation industry. Highway-rail grade crossing fatality statistics have failed to improve over the last decade, and in some years have increased. Because of these trends, research has found that considerable Federal funding initiatives exist to support and develop contemporary risk reduction methodologies involving machine learning and artificial intelligence. In accord with these initiatives, this thesis investigates the highway-rail grade crossing safety problem using machine learning to implement an ensemble decision tree-based classification application. The resulting classifier has been validated to achieve a less than three percent …

Go to article

A Comparative Assessment Of Co2 Emission Between Gasoline, Electric, And Hybrid Vehicles: A Well-To-Wheel Perspective Using Agent-Based Modeling, Mdmamunur Rahman Aug 2020

A Comparative Assessment Of Co2 Emission Between Gasoline, Electric, And Hybrid Vehicles: A Well-To-Wheel Perspective Using Agent-Based Modeling, Mdmamunur Rahman

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Road transports in the U.S. are almost entirely dependent on the consumption of fossil fuel. This high dependency on fossil fuel is significantly contributing to carbon dioxide (CO2) emission, one of the leading Green House Gases (GHGs) responsible for global warming. Electrification of passenger vehicles could be an effective strategy to curb GHG emissions. Though Electric Vehicles (EVs) have zero tailpipe emissions, the power required to charge EV batteries may not necessarily come from carbon-free power plants. In this study, for a comprehensive comparison between EV and Gasoline Vehicle (GV), we developed an agent-based simulation model for the entire energy …

Go to article

Mental Workload Investigation Among Employees In A Selected Oil And Gas Company, C. Moosom Christyne Surindai Aug 2020

Mental Workload Investigation Among Employees In A Selected Oil And Gas Company, C. Moosom Christyne Surindai

Student Works (2020-2029)

In recent years, there has been a substantial amount of studies being conducted in mental workload and mental health but there is little research conducted in the Malaysian context especially in the oil and gas field. This gives rise to the need for researching the level of mental workload and mental health problems that will help the stakeholders to protect the wellbeing of their employees. This study aims to investigate the mental workload and level of depression, anxiety and stress scale of employees in a selected oil and gas company by using CarMen-Q and DASS-21 mental health assessment tools, finds …

Go to article

Emergency Department Systems Engineering: Modelling And Event Simulation, O Alharethi Salman Zayed Aug 2020

Emergency Department Systems Engineering: Modelling And Event Simulation, O Alharethi Salman Zayed

Student Works (2020-2029)

Emergency department systems are meant to ensure the timely delivery for essential healthcare services through complex systems. (ED) offers various services and have several components in its parts. Examined long previous research on system engineering and quality of healthcare resulting on these are influenced by operational management. Real time data are very helpful for decision making for any systems. Patient output feedback and satisfaction can be ensured with engineered management. EDs have become evident particularly in current scenario when the world is in the grip of the deadly COVID-19. All this implies that analysis is significant for improvement of services …

Go to article

Numerical Simulation About Fuel Injection Source Location Impacting On Turbulent Combustion Process, Sun Hui, Guangcheng Cai, Jiang Lin, Shibo Wang Jul 2020

Numerical Simulation About Fuel Injection Source Location Impacting On Turbulent Combustion Process, Sun Hui, Guangcheng Cai, Jiang Lin, Shibo Wang

Journal of System Simulation

Abstract: Fuel injection source location has very important influence on combustion process. It determines the location of the furnace flame. The three dimensional model of the furnace was established by the numerical simulation method. Under different conditions, the fuel injection source location on the temperature field within the furnace, the pollutant concentration field, and the flow field distribution inside the furnace combustion process were investigated. The results were compared and analyzed. After analysis, the results show that the fuel injection source location from 1.1 ~ 1.5 meter process of change, the average temperature within the furnace continue to rise, the …

Go to article

Research On Methods For Transformation Of Declarative Model For Semi-Physical Simulation, Weijian Huang, Jianwan Ding, Liping Chen, Zhaoyuan Zhou Jul 2020

Research On Methods For Transformation Of Declarative Model For Semi-Physical Simulation, Weijian Huang, Jianwan Ding, Liping Chen, Zhaoyuan Zhou

Journal of System Simulation

Abstract: A new method for the transformation from the declarative model to the model for semi-physical simulation was proposed aiming at semi-physical simulation. By analyzing the mathematical form of the declarative model and the model for semi-physical simulation, based on bipartite graph, the mathematical form of declarative model to the mathematical form of the model for semi-physical simulation was transformed through decomposition based on bipartite graph and tearing the algebraic loop, using clutch model as the model transformation examples. The declarative model transforming idea has overcome the disadvantages of process modeling method such as considering the causality, difficult …

Go to article

Improved Crack Removing Algorithm For Quad-Tree Terrain Rendering, Wan Ming, Liang Xia, Fengming Zhang Jul 2020

Improved Crack Removing Algorithm For Quad-Tree Terrain Rendering, Wan Ming, Liang Xia, Fengming Zhang

Journal of System Simulation

Abstract: In 3D large scale multi-resolution terrain rendering, an improved algorithm based on LOD control and visibility for crack removing was proposed. It is proved that quad-tree grid is restricted while the ratio of visible distance to grid extent is large than 3. In preprocess stage, cracks were classified to raise crack and dropped crack, and crack patches with the same size as cracks were generated and attached to the latter. In real-time rendering stage, no special calculation by CPU for restriction of level of detail or for crack removing between adjacent grids was needed. Example shows that …

Go to article

Situation Assessment Method For Cooperative Air Combat Based On Dynamic Combat Power Field, Zhanwu Li, Yizhe Chang, Haiyan Yang, Yingxin Kou, Xu An Jul 2020

Situation Assessment Method For Cooperative Air Combat Based On Dynamic Combat Power Field, Zhanwu Li, Yizhe Chang, Haiyan Yang, Yingxin Kou, Xu An

Journal of System Simulation

Abstract: Considering on the remaining problem in current situation assessment of Beyond-Visual-Range cooperative air combat, such as isolation of static/dynamic state superiority, the concept of combat power field was applied in situation assessment of Beyond-Visual-Range cooperative air combat. Coupled with characteristics of cooperative air combat, the model of combat power field was constructed by aspects of attack, communication, detection, maneuverability, electronic countermeasure and cooperation and alert. The method was verified by the simulation. The result shows the method has advantages of integrity, visualization and continuity compared with former situation assessment methods, and is also able to improve the quality and …

Go to article

Design And Motion Control Of Four-Wheel Automotive Chassis Inspection Robot, Jue Zhu, Yongbin Huang, Zhang He Jul 2020

Design And Motion Control Of Four-Wheel Automotive Chassis Inspection Robot, Jue Zhu, Yongbin Huang, Zhang He

Journal of System Simulation

Abstract: The system structure of an automobile chassis inspection robot was introduced. Furthermore the equation of motion state of robot was established and a decoupling controller was designed. The robot with omnidirectional wheel moving mechanism achieved the chassis image acquisition with wireless camera system and employed the active disturbance rejection controller for motion control. The robot has the characters of wide applicability, flexibility of platform movement, the stability of motion state, which can effectively compensate for the lack of traditional inspection methods, and a reasonable design in automobile chassis inspection is proved. The motion equation of state established for omnidirectional …

Go to article

Risk Analysis Of Passenger Car Moving On Curved Sections Based On Sideslip Microscopic Simulation, Zhang Chi, Dongjian Shao, Zhang Min Jul 2020

Risk Analysis Of Passenger Car Moving On Curved Sections Based On Sideslip Microscopic Simulation, Zhang Chi, Dongjian Shao, Zhang Min

Journal of System Simulation

Abstract: In consideration of rainfall and over-speeding, the risk of passenger car moving on curved sections was analyzed synthetically. The simulation model of the dynamic characteristic of passenger car was established using Carsim, the critical adhesion coefficient was used as the evaluation index of passenger car moving risk, and the evaluation model of passenger car moving on curved sections was established using Matlab. The results show that under the situation of design speed 80km/h, when driving speed exceeds 96km/h, the risk probability of passenger car moving on rainfall curved sections exceeds 48.40%; when the rainfall intensity is bigger than …

Go to article

Numerical Simulation Of Hot And Cold Fluids Mixing In A Tee-Junction, Wenli Wei, Yunfei Hong, Shipeng Shao, Yuling Liu Jul 2020

Numerical Simulation Of Hot And Cold Fluids Mixing In A Tee-Junction, Wenli Wei, Yunfei Hong, Shipeng Shao, Yuling Liu

Journal of System Simulation

Abstract: Flow and heat transfer model in tee junction was established and the 3D RNG k-ε turbulence model was completed to simulate the process of mixing and capture the information of velocity and temperature. The simulation results and measured data of the mean value of velocity and temperature were analyzed and compared, and are in a good agreement, which indicates that the RNG k-ε model combined with the heat transfer model can well simulate the hydraulic characteristics and heat transfer mechanism of hot and cold fluids in a tee junction. Furthermore, the upstream segment of a tee junction has two …

Go to article

Research On Fault Diagnosis For Pitch Sensors Of Wind Turbines, Yanjie Zhai, Dinghui Wu, Yiyang Li, Zhicheng Ji Jul 2020

Research On Fault Diagnosis For Pitch Sensors Of Wind Turbines, Yanjie Zhai, Dinghui Wu, Yiyang Li, Zhicheng Ji

Journal of System Simulation

Abstract: Considering the biased output fault of pitch sensors for wind turbines, a fault diagnosis method based on the multi-innovation kalman filter algorithm was proposed. The corresponding relationship between the change of the pitch angle and the tiny displacement produced by the force acting on the tower was established according to the mechanical structure characteristics of wind turbines. More accurate estimated value for the tiny displacement was achieved by using the multi-innovation kalman filter algorithm which had higher convergence speed and estimation accuracy to reduce the large noise of the output information generated by sensors. The fault could be detected …

Go to article

Research On Optimizing Lot Sizing Of Job Shop Based On Em_Plant, Xiaobing Pei, Linlin Tan Jul 2020

Research On Optimizing Lot Sizing Of Job Shop Based On Em_Plant, Xiaobing Pei, Linlin Tan

Journal of System Simulation

Abstract: Considering maximizing the rate of account and choosing production process time as the optimization objectives to solve the lot sizing optimization problems of job shop, the model about production time under ideal conditions was established, and accordingly the formula of solving theoretical optimal lot sizing was derived. To compensate for the limitations of mathematical modeling and improve the feasibility of the optimal solution, the actual manufacturing operations in job shop was simulated and optimized according to production batch simulation optimization strategy by eM_plant software. By running the simulation model the theoretical optimal solution was amended, to make optimal …

Go to article

Design And Implementation Of Quantum-Inspired Bee Colony Algorithm, Shuyun Yang, Panchi Li Jul 2020

Design And Implementation Of Quantum-Inspired Bee Colony Algorithm, Shuyun Yang, Panchi Li

Journal of System Simulation

Abstract: To enhance the performance of artificial bee colony algorithm, a quantum-inspired bee colony algorithm was proposed. In the proposed approach, the bees were encoded with the qubits described on the Bloch sphere. The evolutionary search was achieved by rotating the qubit about the rotation axis on the Bloch sphere. The Bloch coordinates of qubit can be obtained by measuring with the Pauli matrices, and the optimization solutions can be presented through the solution space transformation. The highlight advantages of this method are the ability to simultaneously adjust two parameters of a qubit and automatically achieve the best match between …

Go to article

Intelligent Detecting For Infrared Aerial Small Target Based On Non-Subsampled Contourlet Transform, Liu Gang, Xingyuan Xu, Zhou Heng, Xitao Zhang Jul 2020

Intelligent Detecting For Infrared Aerial Small Target Based On Non-Subsampled Contourlet Transform, Liu Gang, Xingyuan Xu, Zhou Heng, Xitao Zhang

Journal of System Simulation

Abstract: Aiming at the problem of infrared aerospace small target's detecting under complex background, an intelligent algorithm was proposed based on the non-subsampled contourlet transform and BP neutral network. By using the morphologic top-hat transform which had adaptive structural element, some infrared background was suppressed. By defining the center vector of subband coefficients, the proposed method constructed the synthetical image at high frequency and suppressed the complex background further. Subsequently, taking pixel's gray level, horizontal gradient, vertical gradient, diagonal gradient, neighbour mean and neighbour variance as input character vector, a BP neutral network which had three layers was constructed by …

Go to article

First Prev Next Last