Engineering Commons^™

Development Of A 3d Computational Vocal Fold Model Optimization Tool, Austin C. Vaterlaus

Theses and Dissertations

One of the primary objectives of voice research is to better understand the biomechanics of voice production and how changes in properties of the vocal folds (VFs) affect voice ability and quality. Synthetic VF models provide a way to observe how changes in geometry and material property affect voice biomechanics. This thesis seeks to evaluate an approach of using a genetic algorithm to design synthetic VF models in three ways: first, through the development of a computationally cost-effective 3D vocal fold model; second, by creating and optimizing a variation of this model; and third, by validating the approach. To reduce …

"Thinking Across Borders." 13th Annual Research Week: Event Proceedings, Office Of Research And Sponsored Projects Operations

Excellence Summit (Research Week) Archived Proceedings

Poster and podium presentations of research by students and faculty of University of the Incarnate Word.

Data-Driven Modeling And Prediction For Reservoir Characterization And Simulation Using Seismic And Petrophysical Data Analyses, Xu Zhou

LSU Doctoral Dissertations

This study explores the application of data-driven modeling and prediction in reservoir characterization and simulation using seismic and petrophysical data analyses. Different aspects of the application of data-driven modeling methods are studied, which include rock facies classification, seismic attribute analyses, petrophysical properties prediction, seismic facies segmentation, and reservoir dimension reduction.

The application of using petrophysical well logs to predict rock facies is explored using different data analytics methods including decision tree, random forest, support vector machine and neural network. Different models are trained from a set of well logs and pre-interpreted rock facies data. Among the compared methods, the random …

Multilock: A Document Escrow Service, Dominic Lagorio, Steven Herman

Computer Science and Engineering Senior Theses

The objective of this project is to create a system wherein it is no one person’s responsibility to claim agency over a given file, but rather that the responsibility is distributed amongst a number of individuals who must decide as a unit to grant access to said files. There are a number of driving factors here, including removing culpability for individual involvement with the file, preventing compulsory access to files, and providing sophisticated security protocols for file access.

Biometric Authentication Via Electrocardiogram Signals, Austin Miles, Carlos Garcia

Computer Science and Engineering Senior Theses

Biometric authentication has proven to be a reliable form of security as we have seen its continuous acceptance in multiple areas of technology. This includes facial recognition, fingerprints, gait analysis, and others. In this project, we develop a system that will provide authentication via electrocardiogram (ECG) signals. This system will employ a supervised machine learning approach to connect the various features generated by an ECG signal with the user. We will collect data using an online database. We will use this data to train the machine learning model that will be used to authenticate. Once a user is authenticated, then …

Cup-Net: Compressed Ultrafast Photography Using Convolutional Neural Networks, Matthew Parker

ENGS 88 Honors Thesis (AB Students)

Compressed ultrafast photography (CUP) is a cutting-edge imaging technique that uses a variation of the traditional streak camera to obtain video at 100 billion frames per second with a single exposure. In order to achieve this level of temporal detail, CUP leverages compressed sensing (CS). Compressed sensing theory states that a compressed representation of an image can be directly acquired using a non-adaptive measurement matrix so long as the encoding matrix follows certain properties such as restrictive isometry and incoherence. This compressed representation of the original scene can later be reconstructed back into the original form. CUP applies CS by …

A Low Resource Instrumentation Package For Thermal Ion Sensors, Ruth Nordhoff

ENGS 88 Honors Thesis (AB Students)

This thesis details the redesign of a reproducible, low-resource instrumentation package for deployment on multipoint sensorcraft arrays. Distributed arrays of sensors allow for the collection of simultaneous multipoint data. This instrumentation package provides power, digitization, timing and telemetry for two suborbital auroral thermal ion sensors. This thesis addressed limitations of a previous design, including measurement synchronization, external interfaces, and customizability. Fabrication and integration procedures developed for the redesigned package were implemented throughout the fabrication of 29 devices built for NASA sounding rockets. Results are presented from the 2019 launch of Sub-Tec 8. Recommendations are made for future design iterations.

Perfect Recovery (2,N) Color Visual Cryptography Scheme, Xianhuan Zhang, Zhengxin Fu, Ouyang Dan, Bin Yu

Journal of System Simulation

Abstract: Based on XOR operation and combining the characteristic of computer display technology, a perfect recovery (2,n) color visual cryptography scheme was proposed. Sharing algorithm of color secret image was designed on the basis of constructing row vectors${{V}_{1}},{{V}_{2}},\cdots ,{{V}_{n}}$. Through computing shares by XOR operation and dealing with recovery image, the secret image was recovered. The experimental results show that the scheme on the basis of keeping the simplicity in the reconstruction phase of visual cryptography can realize the secret image perfect recovery with low pixel expansion for price. Each participant only needs to carry a share …

Optimization Sensing Slot Under Transmission Collision Of Primary User And Secondary User In Cognitive Radio System, Chen Song, Nae Zheng, Wang Sheng

Journal of System Simulation

Abstract: In the cognitive radio system, that the primary user (PU) has collision with the secondary user (SU) when the secondary user (SU) was detected properly was considered. The queuing theory was introduced and the PU’s appearance pattern was described by M/M/1 model. Considering the length of the transmitting slot, detection probability and transmitting collision, the function of spectrum usage and transmitting time were established based on the PU’s appearance pattern. The existence of the maximum value of spectrum usage in the definition domain of the transmitting time was proved by theoretical derivation in some condition. The simulation results provide …

Online Identification And Simulation Of Multiple Model Based On Minimum Entropy Clustering, Xiaopeng Zhao, Yongchun Zhang

Journal of System Simulation

Abstract: An online identification algorithm for multiple model based on minimum entropy clustering was investigated. The number of local models and corresponding weights was calculated by the entropy based fuzzy subtractive clustering approach, and the regularity degree of the local system was considered along with the clustering process. Parameters of local models could be estimated online by the weighted recursive least square method. The waste heat recovery Organic Rankine Cycles system was used to demonstrate the algorithm. The result shows the identified multi-model not only can reach an accuracy and reliability identification result, but also has a stronger self-adaptability …

Study On Tracking Filter Algorithms For Nonballistic Targets In Near Space, Yajie Cao, Junlong Li, Qin Lei

Journal of System Simulation

Abstract: Recently, different countries made rapid developments in the field of hypersonic aircraft in near space. The successful flight tests of hypersonic aircraft X-51A and HTV-2 were representative.They adopted the way of nonballistic maneuver flight whose motion trajectory was characterized by “hopping”, which existed the problems of difficulties of nonballistic target acceleration estimation, trajectory tracking and prediction. Four typical nonballistic maneuver models of near space targets of tracking filter are introducedand then target ballistic equation and design of tracking filter are introduced. At last, an estimation of four tracking filter ways is maken towards target acceleration. The effect of particle …

Scheme For Detecting Dos Attack In Bluetooth Low Energy, Qilin Wang, Yicai Huang, Bin Yu

Journal of System Simulation

Abstract: Aiming at the problem that Bluetooth Low Energy is vulnerable to DoS Attack, an alive degree model combining entropy theory was established. Bluetooth Low Energy DoS Attack detecting scheme based on this model was designed. The scheme chose some elements to construct alive volume, which showed the stable distribution in normal communications, and the distribution was destroyed when subjected to DoS attacks. Using alive degree to reflect the distribution of alive volume, the DoS Attack was detected via the variation of alive degree. The theory analysis and experiment results show that, the scheme can effectively detect the DoS Attack …

Research On Pedestrian Crossing Road Skills Assist Training System Based On Game Model, Meiliang Wang, Huagen Wan, Jianping Gu

Journal of System Simulation

Abstract: With the rapid growth of number of family cars in China, there are more and more road accidents, so pedestrians will undoubtedly become the biggest victims in the accidents. Thus it is of great significance to develop a road training system that is able to improve the ability of the pedestrians to process the integrated information of the traffic flow, and reduce the risk of pedestrian in accidents when crossing the roads. Based on the key researches on dynamic virtual traffic scene, human-computer interaction and virtual objects collision detection, with the application of technology of virtual reality and 3 …

Design Of Ble Key Agreement Scheme Based On Hash Chain, Yibo Huang, Yicai Huang, Bin Yu

Journal of System Simulation

Abstract: Aiming at the problem that BLE Secure Simple Pairing protocol is vulnerable to eavesdropping and man-in-the-middle attacks, a BLE key agreement scheme based on hash chain was proposed. The scheme realized mutual authentication and link key agreement applying the unidirectivity and crashworthiness of hash chain. Update mechanism of the hash chain was designed to prevent from reuse of hash chain node values. The security analysis of BAN logic and experiment results show that, the scheme can effectively resist eavesdropping and man-in-the-middle attacks. Meanwhile, it has low storage and computation overheads.

Study On Effects Of T-Spur-Dikes On Flow Characteristics In 90° Bend Channel By Large Eddy Simulation, Wenli Wei, Panpan Li, Shipeng Shao, Yuling Liu

Journal of System Simulation

Abstract: In order to solve the problems of river erosion at concave bank and of sediment deposition at convex bank in actual bend rivers, the 3D hydraulic characteristics of bend channel with spur-dikes must be studied. The gas-liquid two-phase large eddy model was used to numerically simulate the hydraulic characteristics of flow in a 90° bend channel with a spur-dike. Comparisons of the simulated longitudinal velocity with the experimental data show a good agreement, which indicates that the large eddy model is an effective way to study the hydraulic characteristics of bend channels. The analysis of the distribution of velocity …

Robustness Research For Adaptive Control Algorithms Of Pipe Conveying Fluid Vibration, Chen Bing, Yuanyuan Huang, Zhongjun Yin

Journal of System Simulation

Abstract: Pipes with supported ends may lose their dynamic stability due to parametric instability when they convey pulsating fluid. the piezoelectric actuators were taken as the control actuators, and built a controlling mathematical model of the pipeline system. Then aiming at the traditional PID controller’s poor robustness on pipeline system parameters, MRAC system and MRAC system based on adaptive gain of the PD were designed on the basis of Lyapunov stability theory, not only the vibration peak values of the pipeline system were suppressed in a short time, but also the controllers had better robustness on pipeline system parameters. Control …

Sybil Attack Detection Scheme Design In Zigbee Network, Meigen Huang, Bin Yu, Zhiyin Kong

Journal of System Simulation

Abstract: Aiming at the problem of Sybil which attacks and destroys the resource allocation, routing discovery and data aggregation in ZigBee network, a scheme to detect Sybil attacks was proposed. The scheme established a doubt mechanism of Sybil node to mark child nodes in the same location as well as communication distance inconsistent geographical distance. The scheme designed a identified processes of Sybil node via father joint legal neighboring nodes transmitting a random number to the suspected Sybil nodes on different channels simultaneously, identifying Sybil nodes by its correctness. Safety analysis and experiment results show that the proposed scheme has …

Research On Simulation Optimization Of Container Terminal’S Machinery Configuration, Zhaohui Duan, Bingliang Song

Journal of System Simulation

Abstract: The optimization of the machinery allocation under the double constraints of maximized efficiency for loading and unloading processes and optimal machinery usage, and the optimal configuration of bridge cranes under discrete operation modes for a single ship were instigated through modeling with the simulation software Extendsim. It was found that the real-time recording method is a more straightforward and convenient way to investigate the optimal mechanical configuration and double constraints lead to different but more reasonable results than that was obtained under the single constraint on the best mechanical configuration. Due to the discrete characteristics of the bridge crane …

Probing Counterion Condensation Phenomena In Nanostructured Thin Film Block Copolymer And Random Copolymer Electrolytes, Qi Lei

LSU Doctoral Dissertations

This dissertation describes advanced metrology and molecular dynamics simulations for quantifying counterion condensation in block copolymer electrolyte thin films. The fraction of condensed counterions (f_c) were quantified in nanostructured block copolymer electrolyte (BCE) and random copolymer electrolyte (RCE) thin films with new and established experimental techniques. The transition between the osmotic-controlled regime and condensation-controlled regime in BCEs and RCEs was identified using solution uptake measurements via a quartz crystal microbalance (QCM) and environmental grazing incidence small-angle x-ray scattering (GI-SAXS). The activity coefficients of ions in thin film were quantified experimentally and these values matched predictions from Manning’s Theory …

A Study On The Improvement Of Data Collection In Data Centers And Its Analysis On Deep Learning-Based Applications, Dipak Kumar Singh

LSU Doctoral Dissertations

Big data are usually stored in data center networks for processing and analysis through various cloud applications. Such applications are a collection of data-intensive jobs which often involve many parallel flows and are network bound in the distributed environment. The recent networking abstraction, coflow, for data parallel programming paradigm to express the communication requirements has opened new opportunities to network scheduling for such applications. Therefore, I propose coflow based network scheduling algorithm, Coflourish, to enhance the job completion time for such data-parallel applications, in the presence of the increased background traffic to mimic the cloud environment infrastructure. It outperforms …

Parameter Identification Of Induction Motor Based On Tabu-Chaotic Firefly Algorithm, Xiaoyang Xu, Wang Yan, Zhicheng Ji

Journal of System Simulation

Abstract: In order to overcome the defects of traditional induction motor parameter identification methods such as identifying less parameters simultaneously and Low identification accuracy. A multi-parameters identification method based on Tabu-chaotic Firefly Algorithm was proposed. The proposed method can simultaneously identify the stator resistance, stator inductance, rotor time constant and mutual inductance without prior knowledge about the parameters. For the sake of improving the identification accuracy, the formula of attractiveness in original Firefly Algorithm was adjusted, furthermore chaos theory and the idea of Tabu Search was integrated into the algorithm. Simulatied experimental results demonstrate that compared to the other …

Numerical Investigation Of Water-Exit Cavity Flow Of Missile With Complex Configuration, Chongxian Zhang, Xianglin Li, Yuqiu Liu

Journal of System Simulation

Abstract: Based on Zwart-Gerber-Belamri cavitation model, a numerical calculation method of cavitating flow of water-exit missile with complex configuration was proposed. The influence of velocity of water-exit and angle of attack to cavitation of parts of missile was analyzed. The simulation results showed that in the beginning of water-exit course, body-attached bubble quickly grew due to reduction of cavitation number. After that, the effect of bubble break-off and oscillation became more obvious. In water-exit course of zero angle of attack, the length and thickness of bubble of shoulder increased linearly with velocity. The ability of the protrusion to induce …

Airborne Weather Radar Visual Simulation Based-On Dynamic Satellite Cloud Image, Zhang Jun

Journal of System Simulation

Abstract: A real-time simulation algorithm was proposed to generate a wide range of the common aviation weather condition for the flight simulator based-on a set of dynamic satellite cloud images. With this efficient weather simulation algorithm, a fast radar echo visual simulating method was proposed. The proposed method used the 2D simplified Navier-Stokes and microphysics equations to implement the essential numerical simulation of the aviation weather condition. By this way, the complex problem of large-scale cloud resolving and particle-backscattering computing could be viewed as a simple 2D multi-resolution image processing. Real application on the flight simulator shows that the …

Name-Embedded Couplet Creation Based On Mobile Platform, Weihua Shen, Shicheng Zhang, Shunting Wang, Zhigeng Pan

Journal of System Simulation

Abstract: Couplet culture is the crystallization of Chinese traditional culture, and also is the gem of Chinese language. Given the broad mobile intelligent terminal user groups, in order to inherit and carry forward the Chinese traditional culture, Android and iOS system were taken as the design platform, combining the couplet culture and modern science and technology in an organic whole based on the study of name-embedded couplet generation algorithm. The users were allowed to get personalized couplet belong to themselves conveniently and quickly by mobile platform. The name-embedded couplet creation software was expounded in the following areas: design concept, …

Investigation Of Neoprene Medical Gloves: Analysis Of Material Properties, Durability, And Bacterial Barrier Efficacy, Amanda Agui

Honors Scholar Theses

This work aims to investigate the material properties, durability, and bacterial barrier efficacy of neoprene for applications in the healthcare/medical field. A special focus on material stiffness and fatigue failure will be explored. Additionally, manufacturer regulations and testing will be inspected to ensure medical gloves made of neoprene blends have a proper lifespan for its desired application in the healthcare community. The resistance of protective gloves and its ability to withstand perforation failure will be investigated to guarantee the safety of users holds extreme importance. Lastly, an analysis of the bacterial barrier efficacy of neoprene gloves will be determined.

Aerodynamic And Aeroacoustic Performance Of Small Uav Propellers In Static Conditions, William Jordan, Robert W. Deters, Shreyas Narsipur

Publications

The proliferation of small multi-rotor UAVs in commercial, recreational, and surveillance spheres has garnered significant interest in the noise produced by these vehicles. The current research aims to study the relationship between the aerodynamic performance and acoustic characteristics of small-scale UAV propellers. Three commercially available propellers for the DJI Phantom 2/3 UAV were selected for preliminary development and validation of an aeroacoustic experimental test setup and associated data reduction methods. Propeller thrust, torque, and power measurements were recorded at static conditions. Upon successful validation of the test bench, acoustic measurements were taken at the propeller disk’s upstream and in-plane locations. …

Performance Testing Of Aero-Naut Camfolding Propellers, Or D. Dantsker, Robert W. Deters, Marco Caccamo, Michael S. Selig

Publications

The increase in popularity of unmanned aerial vehicles (UAVs) has been driven by their use in civilian, education, government, and military applications. However, limited on-board energy storage significantly limits flight time and ultimately usability. The propulsion system plays a critical part in the overall energy consumption of the UAV; therefore, it is necessary to determine the most optimal combination of possible propulsion system components for a given mission profile, i.e. propellers, motors, and electronic speed controllers (ESC). Hundreds of options are available for the different components with little performance specifications available for most of them. By examining a variety of …

Numerical Method For Rapid Aerostructural Design And Optimization, Jeffrey D. Taylor, Douglas F. Hunsaker

Mechanical and Aerospace Engineering Student Publications and Presentations

During early phases of wing design, analytic and low-fidelity methods are often used to identify promising design concepts. In many cases, solutions obtained using these methods provide intuition about the design space that is not easily obtained using higher-fidelity methods. This is especially true for aerostructural design. However, many analytic and low-fidelity aerostructural solutions are limited in application to wings with specific planforms and weight distributions. Here, a numerical method for minimizing induced drag with structural constraints is presented that uses approximations that apply to wings with arbitrary planforms and weight distributions. The method is applied to the NASA Ikhana …

Hybrid Quantum-Behaved Particle Swarm Optimization Algorithm For Solving Mould Job Shop Scheduling Problem, Zhou Kai, Wang Yan, Zhicheng Ji

Journal of System Simulation

Abstract: Quantum-behaved particle swarm optimization has better performance compared with particle swarm optimization, but it still has the problem of getting trapped into local optimum with premature convergence. According to the above problem, a hybrid algorithm included quantum-behaved particle swarm optimization and bat algorithm was proposed. On the one hand, the random walk strategy of bat algorithm was used to avoid getting into local optimum, on the other hand, the speed changing of bats’ sound was learned to transform the factor of quantum-behaved particle swarm optimization. The proposed algorithm was tested on five benchmark functions and a mould job shop …

Study On Model-Based Visual Servoing With Reconstructed 2d Features, Guoliang Zhang, Jixiang Du, Zhanni Wang, Wang Tian

Journal of System Simulation

Abstract: To overcome the defect of camera retreat in image based visual servoing, a model-based visual servoing incorporated 2D image based visual servoing with 3D features was proposed. The robot visual servoing model was established by altering traditional two dimensional feature to three dimensional features based on traditional IBVS control structure. Furthermore, combined with the Simulink software, simulation model was established and motion characteristics of two methods were analyzed and compared in image space and Cartesian space. The experiment results confirm the feasibility and effectiveness of the proposed method.