Physical Sciences and Mathematics Commons^™

Point Cloud Modeling Based On Compactly Supported Radial Basis Function Under Kd Tree Index Strategy, Li Jia, Duan Ping, Yehua Sheng, Haiyang Lü, Siyang Zhang

Journal of System Simulation

Abstract: Modeling constructed by Compactly Supported Radial Basis Function (CSRBF) and visualization will fail. The main reason is that exhaustive search results in out of memory. KD tree can void exhaustive search due to the advantage of quickly searching. CSRBF combined KD tree was used to construct point cloud model. Modeling approach of CSRBF based on KD tree was proposed. KD tree index of the point cloud was constructed. CSRBF interpolation method was used to construct implicit function model of point cloud. Marching Cubes algorithm was to display model in 3D manner. The experimental results with rabbit point cloud show …

Image Resizing Method Based On Gradient And Visual Saliency, Xingquan Cai, Buni Honghao, Yuqing Qiao, Jinghua Liu, Fengxia Li

Journal of System Simulation

Abstract: In order to delete the image region without obvious features, and not damage the main features of the target for mobile applications, the image resizing method was provided based on gradient and visual saliency. The original image was grayed, and the gradient energy matrix from the gradient of neighborhood pixels was obtained. The complex energy matrix was obtained by weighted sum of visual saliency energy and image gradient energy matrix. The cumulative energy matrix and minimal energy trajectory matrix were calculated, and the minimal energy seam of image was got. The image resizing was completed by deleting the minimal …

Color-Texture Image Segmentation Approach Designed By Integrating Geodesic Active Contour Model And Multilayer Graph Cut Model, Yang Yong, Liangren Zheng, Guo Ling, Yangdong Ye

Journal of System Simulation

Abstract: An approach of color-texture image segmentation was proposed based on geodesic active contour model and multilayer graph cut model. As the clustering centers were commonly descripted with constant densities, the two phase Chan-vese model was extended to multiphase geodesic active contour model by using the Gaussian distribution to describe the changing density for each phase, and meanwhile the geodesic active contour was added into the proposed model, so that the presented approach could capture out the concave edge. For the minimization of the proposed energy function, a corresponded multilayer graph cut model was designed for resolving global approximated …

Self-Adaptive Simplification Algorithm For Suggestive-Contours Preserving, Zhou Wen, Jinyuan Jia

Journal of System Simulation

Abstract: It is important that features quickly extract in large-scale model retrieval. The preprocessing of 3D model simplified the mesh, not changed the contours. Based on the data structure of the cross linked list, a framework for self-adaptive algorithm was proposed, according to mesh structure, it automatically selected the rate to simplify. Besides, by computing the related mesh principal curvatures, the edge that some condition was met, were put in the structure of heap for simplification operating. In the experiment, the models were divided into the complex model and the common model. The program could simplify the operation …

Survey On Pedestrian Detection Based On Statistical Classification, Li Wei, Pengjie Wang, Haiyu Song

Journal of System Simulation

Abstract: As one of the most important areas of research in the domain of computer vision and intelligent tranffic, pedestrian detection has attacted extensive interest from the research community in recent years. Because the detection based on statistical classification method is efficient, it has been widely applied. Pedestrian detection method was focused based on statistical classification. Standard dataset for evaluation of human detection was reviewed, studying the statistics about these dataset. Extracted features and the improvement on them were summarized. The main classifier for pedestrian detection was summarized. The present problems and future research trends in pedestrian detection were proposed.

Private Face Detection Based On Random Sub-Images In Cloud, Yuan Peng, Jin Xin, Xiaodong Li, Zhao Geng, Yaming Wu, Mingxin Ma, Yulu Tian, Yingya Chen

Journal of System Simulation

Abstract: In order to detect faces of terminal face image in the cloud at the same time protect both privacy of data,a method of face images privacy detection based on random sub-Images representation was proposed. Terminal divided original image into 2 value sub-images weighted sum based on random sub-images generation algorithm and randomly arranges weights of sub-images. Terminal sent sub-images according to the weights of random sequence to the cloud server. Cloud server detected sub-images with its face detection algorithm. Terminal merges test results based on random sub were exploded. Two random vectors were leveraged to protect the parameters …

New Evaluating Algorithm Of The Single Ship Track When Inward/Outward Port Based On Ship-Handling Simulator Training, Fang Cheng, Hongxiang Ren, Yicheng Jin

Journal of System Simulation

Abstract: The simulating navigation evaluation of the single ship when inward/outward port was a basic kind of examination type in maritime safety administration’s ship maneuvering ability test question system. In order to evaluate the track of the single ship when inward/outward port based on ship-handling simulator training. Constructed the track of evaluation index system by the investigation and analysis, established a comprehensive evaluation model of the single ship’s track when inward/outward port. In order to quantitative evaluate the score of unevaluated track by compared with the evaluated track score, a new evaluating cloud similarity algorithm of the single ship …

Algorithm Of Simulation Of Cutting Mouse’S Ovary Based On Leap Motion, Li Hao, Yang Meng, Hu Jie, Jiao Hao, Zhai Ying, Qie Wei, Yang Gang

Journal of System Simulation

Abstract: A cutting algorithm was proposed for Mouse’s ovary model based Leap Motion. The realistic data of the main mouse organs were collected. These data were deeply analyzed. The models of mouse and organs were imported into Unity3D to create a virtual environment and an interface between Leap Motion and Unity3D. It realized the cutting on mouse’s ovary model through a cutting algorithm which created a plane formed by the collision points and the camera, and it realized the deformation of the mouse’s ovary model through a deformation algorithm based kinematic formula. The results show that the cutting algorithm can …

Embedded Face Recognition Combined Mutual Information With Log-Gabor Feature, Jihua Ye, Qingping Lan, Changhong Liu, Shimin Wang

Journal of System Simulation

Abstract: Log-Gabor functions have extended tails at the high frequency end, can effectively improve the shortcoming of ordinary Gabor functions which would over-represent the low frequency components and under-represent the high frequency components, and Log-Gabor filter has no DC components, the bandwidth is not limited, so Log-Gabor filter is more suitable than Gabor filter to extract the face feature. After extracting features of a face image by a Log-Gabor filter bank which is composition of four scales and six orientations, the amount of data is 24 times of the original, but the embedded equipment resources are limited, it is difficult …

Layered Electro-Magnetic Refreshablebraille Display With Haptic Rendering, Xinli Wu, Panfei Zhu, Wenzhen Yang, Zhongzheng Jin, Jianqiang Xuan, Xu Yan, Zhichao Zhu

Journal of System Simulation

Abstract: Refreshable braille display is an important application of haptic rendering in virtual reality.Aprototype of a layered electro-magnetic refreshablebraille displaywas developed, which has complex mechanical structures and a control system, and coulddynamical display of20braille words. By designing the layered and dislocatedbraille driving mechanism, this refreshablebraille displayrealizedthe arrangement of 120 braille points. By switchingthe current of the electromagnetic coils, the control system of this refreshablebraille displayrealizedthe movement control of these braille points. This prototype has the advantages of small volume, low cost, high refresh rate, and can generate enough supporting forcefor fingertip haptic reading braille.

Stereo Matching Based On Pyramid Transform Cross-Scale Cost Aggregation, Yao Li, Zhukui Liu, Bingfeng Wang

Journal of System Simulation

Abstract: Human visual system processes the received visual signals on different scales, however, the traditional stereo matching algorithms get the disparity map from the original image in the biggest scale, which will lead to high stereo matching error rate in the area of low-texture, texture-less area. Simulation of the human visual system in stereo matching on multiple scales can reduce error rate. A stereo matching method based on the Gaussian pyramid cross-scale transform was improved, by adding the Laplace Pyramid Transform to the original cross-scale framework and adding the weighted joint bilateral filter in the disparity refinement stage. The …

Model And Method Of Space Objects Multi-Scale Expression, Qunshan Shi, Chaozhen Lan, Liang Jing, Wanjie Lu, Wang Dong

Journal of System Simulation

Abstract: To allow users to acquire accurately and efficiently information, which they need, from vast amounts of space situational information, the thought of multi-scale expression was used, on the basis of analysis of various factors, which influenced space objects expression, multi-scale expression models were established, space objects multi-scale expression was achieved combined with the construction of the voronoi diagram. The experiments were done to verify the validity of the model and methods, the results show that: this method can largely control the amount and level of detail of information, can meet the requirements of clarity and legibility of space situational …

Research On Autonomous Intercept Method For Ucav Based On Lead Attack Aiming, Huaxing Wu, Huang Wei, Fengju Kang, Hongbao Mao

Journal of System Simulation

Abstract: For the problem of autonomous intercepting moving target with air-to-air missiles for an unmanned combat air vehicle, autonomous guiding method based on lead attack aiming errors was studied. The aiming errors were computed by building the motion model of UCAV and the model of lead attack aiming. Then to meet the goal of decreasing the aiming errors during flight control, two maneuver strategies based on model predictive control approach were presented: one used proportional navigation method and the other employed simulated annealing particle swarm optimization algorithm. The simulation result shows that both strategies can implement autonomous intercept for targets …

Face Recognition Algorithm Based On Mixed Multiple Distance Image And Linear Discriminant Analysis, Yaling Cheng, Aiping Tan, Zhang Min

Journal of System Simulation

Abstract: The existing face recognition algorithms used in intelligent monitoring system are mainly applied to short distance images, which still have the problem of low face recognition rate when being applied to long distance images because the image quality decreases as the distance grows. To improve the face recognition accuracy in long distance images, a novel face recognition algorithm was proposed based on using mixed multiple different distance images and Linear Discriminant Analysis (LDA). The proposed algorithm used mixed images extracted from multiple different distances to train images, and used bilinear interpolation method to normalize the image set, and then …

Object Detection In Rgb-D Image Based On Annet, Cai Qiang, Liwei Wei, Haisheng Li, Cao Jian

Journal of System Simulation

Abstract: The wide spread of depth images acquisition devices makes object detection in RGB-D images a hotspot in the field of computer vision. In order to make the features extracted by CNN more robust and to improve the detection accuracy, an improved CNN called ANNet was designed. To enhance the model discriminability of local patches within the receptive field, some linear convolutional layers in the AlexNet with nonlinear convolutional layers were replaced which contained multilayer perceptron against the linear feature between convolution filter and underlying data patch. The experiment result shows that the detection accuracy is improved by 3% in …

Kinematic Calibration Of Stewart Platform Based On Relative Visual Pose, Ma Jin, Guofeng Zhang, Shuling Dai, Zeng Rui

Journal of System Simulation

Abstract: To improve the control accuracy of flight simulator motion system, a kinematic error analysis and calibration based on relative visual pose measurement of electric Six-DOF Stewart platform were proposed. Considering the structural characteristic of Stewart platform, a rotary compensation algorithm was concerned firstly to raise the control accuracy. Then kinematic error model and optimal calibration algorithm were established, according to kinematic equations and vector closed-loop characteristic. Latterly, pose data was achieved using Basler industrial camera and ID marker featured by CRC (Cyclic Redundancy Check) and FEC (Forward Error Correction). Finally, measurements and experiment results supported the validity of the …

Research Of Display Accuracy Improvement In Multi-Scale 3d Scene, Pengfei Li, Zhou Yang, Jiwei Xu, Xiaofei Hu, Xianguang Xue

Journal of System Simulation

Abstract: In the multi-scale 3D scene, the single reference coordinate system has much application limitation due to the large spatial scale change, so the target will appear wobble phenomenon when the camera observes the target in a large distance from the reference coordinate. Due to the fact that the position and attitude of a spatial object change all the time under the unified time datum, the target will appear wobble phenomenon when the camera following a target observes a certain area near the target. A setting method of reference coordinate system based on the observation of the inertial coordinate system …

Smt Bounded Constrained Non Centralized Automaton Web Service Model Checking, Wei Rong, Xibing Shen, Yang Yi

Journal of System Simulation

Abstract: In model checking for web services applications, the combination of traditional finite state machine cannot guarantee the correctness of web service composition, a method of non centralized automaton model for web service detection algorithm was put forward,based on which could meet of mode theory (satisfiability modulo of the nanocomposite, SMT). The SMT was used to detect the bounded model of timed automata, and the time automaton was directly converted into SMT identifiable logic formula and was solved; using the SMT timed automata theory, implementation of employee travel arrangements for composite web service was modeled and verified. Through …

Modifications To Gravitational Wave Equation From Canonical Quantum Gravity, Andrea Dapor, Klaus Liegener

Faculty Publications

It is expected that the quantum nature of spacetime leaves its imprint in all semiclassical gravitational systems, at least in certain regimes, including gravitational waves. In this paper we investigate such imprints on gravitational waves within a specific framework: space is assumed to be discrete (in the form of a regular cubic lattice), and this discrete geometry is quantised following Dirac's canonical quantisation scheme. The semiclassical behavior is then extracted by promoting the expectation value of the Hamiltonian operator on a semiclassical state to an effective Hamiltonian. Considering a family of semiclassical states representing small tensor perturbations to Minkowski background, …

Zenithal Pedestrian Detection Using Multiple Feature Fusion In Monocular Vision, Chunhui Tang

Journal of System Simulation

Abstract: There were extensive literatures on pedestrian detection, mostly supposed that visible humans were observed in flat view. Sometimes pedestrian detection from another perspective should be considered. The pedestrian detection with a vertical view camera was taken into account, which was usually used to count the pedestrian number. A method is put forward for zenithal pedestrian detecting based on rectangular partition features, in which the pedestrian head detection takes place of the body detection. It is by the exhaustive scanning to find targets in an image and so all the candidates are put into a series of rectangular feature …

Research On Anchor Handling Simulation System, Zhongxian Zhu, Yin Yong, Helong Shen

Journal of System Simulation

Abstract: Anchor handling simulator (AHS) can provide a good visualization platform for the researchers and the anchor handling trainees, and has important significance on improving the working environment and efficiency. To build the anchor handling simulation platform, the mooring system's dynamics model was established based on Lumped Mass Method(LMM), and the offshore platform and anchor handling vessel's mathematical models were introduced based on the existing technologies in marine simulator. By utilizing the OpenSceneGraph(OSG) scene management engine and applying a series of visualization technologies, realized the simulation of the anchor handling operations, a real-time …

A Multicenter Mixed-Effects Model For Inference And Prediction Of 72-H Return Visits To The Emergency Department For Adult Patients With Trauma-Related Diagnoses, Ehsan Yaghmaei, Louis Ehwerhemuepha, William Feaster, David Gibbs, Cyril Rakovski

Mathematics, Physics, and Computer Science Faculty Articles and Research

Objective

Emergency department (ED) return visits within 72 h may be a sign of poor quality of care and entail unnecessary use of healthcare resources. In this study, we compare the performance of two leading statistical and machine learning classification algorithms, and we use the best performing approach to identify novel risk factors of ED return visits.

Methods

We analyzed 3.2 million ED encounters with at least one diagnosis under “injury, poisoning and certain other consequences of external causes” and “external causes of morbidity.” These encounters included patients 18 years or older from across 128 emergency room facilities in the …

Highly Swelling Ph-Responsive Microgels For Dual Mode Near Infra-Red Fluorescence Reporting And Imaging, Mingning Zhu, Dongdong Lu, Qing Lian, Shanglin Wu, Wenkai Wang, L. Andrew Lyon, Weiguang Wan, Paulo Bártolo, Mark Dickinson, Brian R. Saunders

Engineering Faculty Articles and Research

Near infra-red (NIR) fluorescence is a desirable property for probe particles because such deeply penetrating light enables remote reporting of the local environment in complex surroundings and imaging. Here, two NIR non-radiative energy transfer (NRET) fluorophores (Cy5 and Cy5.5) are coupled to preformed pH-responsive poly(ethylacrylate-methacrylic acid-divinylbenzene) microgel particles (PEA-MAA-5/5.5 MGs) to obtain new NIR fluorescent probes that are cytocompatible and swell strongly. NIR ratiometric photoluminescence (PL) intensity analysis enables reporting of pH-triggered PEA-MAA-5/5.5 MG particle swelling ratios over a very wide range (from 1–90). The dispersions have greatly improved colloidal stability compared to a reference temperature-responsive NIR MG based on …

Erratum: Basis Set Dependence Of Higher-Order Correlation Effects In Π -Type Interactions (J. Chem. Phys. (2012) 136 (014103) Doi: 10.1155/2019/4057848), Emily J. Carrell, Cara M. Thorne, Gregory S. Tschumper

Chemistry Faculty Research & Creative Works

For a sequence of three correlation consistent basis sets,1 an algebraic expression can be obtained from Feller's three-parameter exponential function for the complete basis set (CBS) limit of the Hartree–Fock (HF) energy.2 During the derivation of a general three-point algebraic expression for the HF CBS limit,3 it was recognized that Eq. (2) in our original paper4 had the wrong sign in the last term in the denominator. The correct equation is as follows: (Formula Presented). (Table Presented).

Evidence For A Supergalactic Structure Of Magnetic Deflection Multiplets Of Ultra-High-Energy Cosmic Rays, Rasha U. Abbasi

Physics: Faculty Publications and Other Works

Evidence for a large-scale supergalactic cosmic-ray multiplet (arrival directions correlated with energy) structure is reported for ultra-high-energy cosmic-ray (UHECR) energies above 1019 eV using 7 years of data from the Telescope Array (TA) surface detector and updated to 10 years. Previous energy–position correlation studies have made assumptions regarding magnetic field shapes and strength, and UHECR composition. Here the assumption tested is that, because the supergalactic plane is a fit to the average matter density of the local large-scale structure, UHECR sources and intervening extragalactic magnetic fields are correlated with this plane. This supergalactic deflection hypothesis is tested by the entire …

Multicourse Comparative Study Of The Core Aspects For Flipped Learning: Investigating In-Class Structure And Student Use Of Video Resources, Nicole Naibert, Emryse Geye, Michael M. Phillips, Jack Barbera

Chemistry Faculty Publications and Presentations

Since 2013, the number of publications on flipped learning within chemistry have steadily increased. However, most of these studies focus on flipped course reforms within individual institutions, while the outcomes of any learning environment are dependent on how the environment is structured and the degree to which students interact with its elements. In this study, we apply a coordinated set of assessment practices to investigate similarities among flipped chemistry courses at five institutions in the United States. All courses in the study followed the two basic tenets of flipped learning: (1) foundational information was delivered through preclass materials (PCMs), and …

Examining The Intersection Of Environmental Justice, Chronic Disease, And Pandemics; How A Mobile Health App Could Improve Health Outcomes And Inform Policy, Jessica Snow

Master's Projects and Capstones

The purpose of this paper is to analyze the intersection of environmental justice, chronic disease and illness, and pandemics. The inequitable distribution of polluting factories, landfills, and hazardous waste sites have been a long-standing concern in the field of environmental justice. Local zoning codes and land use policies have been tools for segregating people and concentrating pollution in low-income communities and communities of color. Many studies have found that pollution varies among racial and minority groups, and the burden of pollution is not one that is evenly shared. Communities of color and low income communities are disproportionately affected by air …

Fostering Climate Change Resilience: A Socio-Ecological Forest Systems Approach, Alyssa R. Soucy

Electronic Theses and Dissertations

As climate change continues to impact socio-ecological systems, those that rely on natural resources are highly sensitive to climatic changes. Maine’s forest industry provides for the economic and social well-being of many residents and is especially vulnerable to climate change impacts. Changes in growing season length and timing, forest health threats imposed by insects and pathogens, extreme weather events, shifting forest composition, and changes in natural disturbance severity and frequency have already begun, and are projected to continue, to impact forest systems in the Northeastern U.S. While climate change presents a threat to forest systems, opportunities also arise due to …

The Impact Of Different Grassland Land‐Uses On Earthworm Populations In A New Zealand Fragi‐Pallic Soil, Todd A. White, Trevor L. Knight, C. L. Goulter, W. J. Clarke-Hill

IGC Proceedings (1993-2023)

No abstract provided.

Patterns In Tropical Grass Silicification: Response To Substrate Fertilization, Valentin Kindomihou, Pierre Meerts, Brice Sinsin

IGC Proceedings (1993-2023)

No abstract provided.