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Articles 7741 - 7770 of 25621

Full-Text Articles in Computer Engineering

Decision Agriculture, Abdul Salam, Usman Raza Aug 2020

Decision Agriculture, Abdul Salam, Usman Raza

Faculty Publications

In this chapter, the latest developments in the field of decision agriculture are discussed. The practice of management zones in digital agriculture is described for efficient and smart faming. Accordingly, the methodology for delineating management zones is presented. Modeling of decision support systems is explained along with discussion of the issues and challenges in this area. Moreover, the precision agriculture technology is also considered. Moreover, the chapter surveys the state of the decision agriculture technologies in the countries such as Bulgaria, Denmark, France, Israel, Malaysia, Pakistan, United Kingdom, Ukraine, and Sweden. Finally, different field factors such as GPS accuracy and …

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Autonomous Irrigation Management In Decision Agriculture, Abdul Salam, Usman Raza Aug 2020

Autonomous Irrigation Management In Decision Agriculture, Abdul Salam, Usman Raza

Faculty Publications

In this chapter, the important application of autonomous irrigation management in the field decision agriculture is discussed. The different types of sensor-guided irrigation systems are presented that includes center pivot systems and drip irrigation systems. Their sensing and actuator components are with detailed focus on real-time decision-making and integration to the cloud. This chapter also presents irrigation control systems which takes, as an input, soil moisture and temperature from IOUT and weather data from Internet and communicate with center pivot based irrigation systems. Moreover, the system architecture is explored where development of the nodes including sensing and actuators is presented. …

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Underground Wireless Channel Bandwidth And Capacity, Abdul Salam, Usman Raza Aug 2020

Underground Wireless Channel Bandwidth And Capacity, Abdul Salam, Usman Raza

Faculty Publications

The UG channel bandwidth and capacity are vital parameters in wireless underground communication system design. In this chapter, a comprehensive analysis of the wireless underground channel capacity is presented. The impact of soil on return loss, bandwidth, and path loss is discussed. The results of underground multi-carrier modulation capacity are also outlined. Moreover, the single user capacity and multi-carrier capacity are also introduced with an in-depth treatment of soil texture, soil moisture, and distance effects on channel capacity. Finally, the chapter is concluded with a discussion of challenges and open research issues.

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Variable Rate Applications In Decision Agriculture, Abdul Salam, Usman Raza Aug 2020

Variable Rate Applications In Decision Agriculture, Abdul Salam, Usman Raza

Faculty Publications

In this chapter, the variable rate applications (VRA) are presented for the field of decision agriculture. The characteristics of VRA control systems are described along with control hardware. Different types of VRA systems are discussed (e.g., liquid VRA systems and dry VRA systems). A case study is also explored in this regard. Moreover, recent advances and future trends are also outlined. Accordingly, a sustainable variable-rate irrigation scheduling is studied where different hardware and software component of the cyber-physical system are considered. Finally, chapter is concluded with a novel sensor deployment methodology.

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Circus In Motion: A Multimodal Exergame Supporting Vestibular Therapy For Children With Autism, Oscar Peña, Franceli L. Cibrian, Monica Tentori Aug 2020

Circus In Motion: A Multimodal Exergame Supporting Vestibular Therapy For Children With Autism, Oscar Peña, Franceli L. Cibrian, Monica Tentori

Engineering Faculty Articles and Research

Exergames are serious games that involve physical exertion and are thought of as a form of exercise by using novel input models. Exergames are promising in improving the vestibular differences of children with autism but often lack of adaptation mechanisms that adjust the difficulty level of the exergame. In this paper, we present the design and development of Circus in Motion, a multimodal exergame supporting children with autism with the practice of non-locomotor movements. We describe how the data from a 3D depth camera enables the tracking of non-locomotor movements allowing children to naturally interact with the exergame . A …

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The Law Of Black Mirror - Syllabus, Yafit Lev-Aretz, Nizan Packin Aug 2020

The Law Of Black Mirror - Syllabus, Yafit Lev-Aretz, Nizan Packin

Open Educational Resources

Using episodes from the show Black Mirror as a study tool - a show that features tales that explore techno-paranoia - the course analyzes legal and policy considerations of futuristic or hypothetical case studies. The case studies tap into the collective unease about the modern world and bring up a variety of fascinating key philosophical, legal, and economic-based questions.

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Tech Policy And Legal Theory Syllabus, Yafit Lev-Aretz, Nizan Packin Aug 2020

Tech Policy And Legal Theory Syllabus, Yafit Lev-Aretz, Nizan Packin

Open Educational Resources

Technology has changed dramatically over the last couple of decades. Currently, virtually all business industries are powered by large quantities of data. The potential as well as actual uses of business data, which oftentimes includes personal user data, raise complex issues of informed consent and data protection. This course will explore many of these complex issues, with the goal of guiding students into thinking about tech policy from a broad ethical perspective as well as preparing students to responsibly conduct themselves in different areas and industries in a world growingly dominated by technology.

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Blockchain And Its Transformational Impact To Global Business, Mohammed Qaudeer Aug 2020

Blockchain And Its Transformational Impact To Global Business, Mohammed Qaudeer

Operations Research and Engineering Management Theses and Dissertations

The advent of internet to the public back in 1994 resulted in the 4th industrial revolution disrupting and transforming business and communication models. As much as the transformation changed our lives and experiences, it has resulted in centralized models like Amazon and Facebook. It also resulted in exponential growth of Fraud, Identity theft, and lack of trust. Blockchain is considered an emerging technology of this era, which will trigger the 5th industrial revolution enabling another massive storm of disruptive transformation completely changing the current business models based on trust, security, collaboration and crypto currency. As the evolution of blockchain technology …

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First Year Students' Experience In A Cyber World Course - An Evaluation, Frank Breitinger, Ryan Tully-Doyle, Kristen Przyborski, Lauren Beck, Ronald S. Harichandran Aug 2020

First Year Students' Experience In A Cyber World Course - An Evaluation, Frank Breitinger, Ryan Tully-Doyle, Kristen Przyborski, Lauren Beck, Ronald S. Harichandran

Electrical & Computer Engineering and Computer Science Faculty Publications

Although cybersecurity is a major present concern, it is not a required subject in University. In response, we developed Cyber World which introduces students to eight highly important cybersecurity topics (primarily taught by none cybersecurity experts). We embedded it into our critical thinking Common Course (core curriculum) which is a team-taught first-year experience required for all students. Cyber World was first taught in Fall 2018 to a cohort of over 150 students from various majors at the University of New Haven. This article presents the evaluation of our Fall taught course. In detail, we compare the performance of Cyber World …

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Domain Specific Computing In Tightly-Coupled Heterogeneous Systems, Anthony Michael Cabrera Aug 2020

Domain Specific Computing In Tightly-Coupled Heterogeneous Systems, Anthony Michael Cabrera

McKelvey School of Engineering Graduate Student Theses & Dissertations

Over the past several decades, researchers and programmers across many disciplines have relied on Moores law and Dennard scaling for increases in compute capability in modern processors. However, recent data suggest that the number of transistors per square inch on integrated circuits is losing pace with Moores laws projection due to the breakdown of Dennard scaling at smaller semiconductor process nodes. This has signaled the beginning of a new “golden age in computer architecture” in which the paradigm will be shifted from improving traditional processor performance for general tasks to architecting hardware that executes a class of applications in a …

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Review Of 3d Flow Visualization, Hange Song, Shiguang Liu Aug 2020

Review Of 3d Flow Visualization, Hange Song, Shiguang Liu

Journal of System Simulation

Abstract: 3D flow visualization describes the complex flow structure by computer graphics methods, reveals the internal laws and physical characteristics of the fluid, and has an important role in the aviation, atmosphere, and medicine and so on. There are many problems to be solved in the 3D flow visualization because of the dimension and the data scale of the 3D space. The classification of the 3D flow visualization was showed by the research status and methods, which could be divided the line-based visualization, surface-based visualization, volume rendering and texture-based visualization. The progress and problems in the above aspects were …

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Fast Implementation Of Virtual Prototyping Modeling Based On Assembly Model, Wang Yu, Shouwen Yao, Jilin Liu, Dezhi Huang, Qinghua Zhang, Yi Ran Aug 2020

Fast Implementation Of Virtual Prototyping Modeling Based On Assembly Model, Wang Yu, Shouwen Yao, Jilin Liu, Dezhi Huang, Qinghua Zhang, Yi Ran

Journal of System Simulation

Abstract: A new method of virtual prototyping modeling was proposed based on assembly model, concerning the relation between assembly forms and dynamic constrains. With the transformation of assembly forms and dynamic constrains, a virtual prototyping model was built by the use of constrain models. Analysis of principle of modeling virtual prototype based on assembly was carried out, and the corresponding relationship between the assembly constraints in Pro/E and constraint block was studied and the method of modeling gear transmission was researched. With the utility of SimMechanics, a model library facing mechanism analysis under Simulink, a concept verification of a simple …

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Research On Simulation Of Flexible Rope For Ship, Mincang Liang, Yin Yong Aug 2020

Research On Simulation Of Flexible Rope For Ship, Mincang Liang, Yin Yong

Journal of System Simulation

Abstract: In view of the problems on unreal-time, less realistic and the instability of the marine flexible rope simulation system, one kind of structure-bending spring model was proposed based on the traditional mass-spring model. Bending springs were added in the model to limit the abnormal bending phenomenon in the particle of model by setting different elasticity and damping coefficient for two kinds of spring to simulate the ropes with different rigidity. In order to guarantee the stability and accuracy of the model, improved Euler method was adopted for numerical solution. At the same time, position adjustment method and speed …

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Impact Of Consistency Between Visually Perceived Movement And Real Movement On Cybersickness, Cai Li, Dongdong Weng, Zhenliang Zhang, Xingyao Yu Aug 2020

Impact Of Consistency Between Visually Perceived Movement And Real Movement On Cybersickness, Cai Li, Dongdong Weng, Zhenliang Zhang, Xingyao Yu

Journal of System Simulation

Abstract: The cybersickness is still a huge obstacle for virtual reality (VR) system. Current researches on cybersickness are mostly based on static or dynamic simulators, while studies in the real movement state is rare. An evaluating system which employed a head-mounted display (HMD) with a running vehicle was proposed to study the cybersickness in the real movement state. In this system, users sitting in the vehicle could see virtual scenes which was consistent with the real motion through the HMD. Subjective and objective evaluating experiments were proposed to analyze the different levels of the cybersickness caused by visual-vestibular conflict. …

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Ship Floating Calculation Based On Cgal, Zhizhou Wang, Xiaofeng Sun, Yin Yong, Chunlei Liu Aug 2020

Ship Floating Calculation Based On Cgal, Zhizhou Wang, Xiaofeng Sun, Yin Yong, Chunlei Liu

Journal of System Simulation

Abstract: To improve the computational accuracy of ship floating condition, a method of ship floating calculation was proposed based on CGAL (Computational Geometry Algorithms Library). By using the slicing module in CGAL, the offset table was obtained through longitudinally slicing 3D design surface; The shell data were gained by simplification and equidistant offsetting; The Jacobi matrix coefficients were achieved by intersecting water plane and shell data; Ship floating condition equations were solved by Newton iteration method. Taking Bulk carrier "SHANDONG REN HE" as an example, ship floating calculations under ten typical loading conditions were carried out. The computational error between …

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Paralleled Dynamic Crowd Emotion Contagion Algorithm, Xiang Nan, Mingmin Zhang, Lingyun Zhu Aug 2020

Paralleled Dynamic Crowd Emotion Contagion Algorithm, Xiang Nan, Mingmin Zhang, Lingyun Zhu

Journal of System Simulation

Abstract: As the positions of crowd usually change dynamically, then computing the contagion process becomes a challenge. There current algorithms were too time consuming to be adopted as they needed to calculate the reactions between every two objects. In order to solve this problem, a social force based contagion computing algorithm with GPU acceleration was provided. Individuals’ affection fields were projected onto two dimensional mesh grid and represented by the nine-box diary; The social force reactions between individual and nearest neighbors were computed to get the moving position; The contagion results from nearest neighbors were calculated. All of these steps …

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Overview Of Cartogram Algorithm, Chen Yi, Yunfang Zhao, Xiaomin Du Aug 2020

Overview Of Cartogram Algorithm, Chen Yi, Yunfang Zhao, Xiaomin Du

Journal of System Simulation

Abstract: Cartogram is a type of visualization method for effectively presenting the geographical information distribution of the statistical data, which has a wide range of usage in many fields. The concepts, classifications and generation methods of the Cartogram were described. Different generation algorithms of it were summarized, considering the continuity and regularity features. Besides, from the two aspects of both statistical and geographical distortions, three evaluation indexes were proposed: an index that evaluated whether the area sizes represented the true attribute values; and one which represented the degree of the regional shape distortions; and last but not the …

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Random-Walk Smokescreen Simulation Model Of Real-Time Correction, Sun Xun, Xuanyu Wang, Wang Xian, Shunhua Liu Aug 2020

Random-Walk Smokescreen Simulation Model Of Real-Time Correction, Sun Xun, Xuanyu Wang, Wang Xian, Shunhua Liu

Journal of System Simulation

Abstract: Gaussian diffusion mode of smokescreen is not suitable for complex atmospheric conditions and it is not easy to accurately obtain statistical properties of particles by utilizing random-walk mode, so the practicability of these two kinds of modes is limited. In view of the problems mentioned above, the revised random-walk smokescreen simulation model method was put forward, in the method, mathematical morphology algorithm was utilized to detect the data on smokescreen edge in a video in real-time and the model was rectified in real-time on basis of such data. The test result indicates that the revised model is suitable for …

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Fast Image Blending Using Seeded Region Growing, Yili Zhao, Xu Dan, Wenhua Qian, Zhang Yan Aug 2020

Fast Image Blending Using Seeded Region Growing, Yili Zhao, Xu Dan, Wenhua Qian, Zhang Yan

Journal of System Simulation

Abstract: This paper presented a novel approach for combining and blending a set of aligned images into a composite mosaic with no visible seams. The compositing seam is found efficiently via seeded region growing using a photometric criterion. A contribution of this paper is to use seeded region growing on image differences to find possible seams over areas of low photometric difference. This can result in significant reduction of blending time. The using of seeded region growing over image pairs guaranteed the approximate optimal solution for each intersection region. The independence of such regions makes the algorithm suitable for parallel …

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Design Of Simulation System About Laser Weapon Cooperative Engagement, Wang Xin, Xu Lei, Zhiyong Su Aug 2020

Design Of Simulation System About Laser Weapon Cooperative Engagement, Wang Xin, Xu Lei, Zhiyong Su

Journal of System Simulation

Abstract: To satisfy the need of air defense combat in the future, the concept of cooperative combat of new laser weapons and traditional anti-aircraft weapons was proposed. The simulation system based on HLA aimed to improve the performance of the system of traditional anti-aircraft weapons. The whole system was mainly divided into three parts: simulation platform, equipment simulation and three-dimensional simulation. Firstly, the object class and interaction class were designed according to federal members and federal integration. Then the important part was the three-dimensional modeling and simulation work of every weapon system. Finally, the air defense simulation system was …

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3d Real-Time Visualization And Simulation Platform For Collaborative Path Planning Of Ua, Chen Gong, Xu Lei, Zhiyong Su Aug 2020

3d Real-Time Visualization And Simulation Platform For Collaborative Path Planning Of Ua, Chen Gong, Xu Lei, Zhiyong Su

Journal of System Simulation

Abstract: There are still some issues existing in current path planning of UAV, such as planning result simulation verification and 3D visualization. To solve the problems, a 3D real-time visualization and simulation platform for collaborative path planning of UAV was proposed. The target area was divided and calculated. The reconnaissance beam of UAV was modeled with virtual camera, the intersection points obtained quickly based on graphics hardware. The terrain mesh was calculated by scan-line polygon filling algorithm, reconnaissance information was recorded and analyzed, and the color temperature maps were given. Through the actual operation by the simulation platform, simulation …

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Three-Dimensional Data Exploration Technology Based On Large-Scale Complex Geometrical Surfaces, Zhiwei Ai, Cao Yi, Xiao Li, Huawei Wang Aug 2020

Three-Dimensional Data Exploration Technology Based On Large-Scale Complex Geometrical Surfaces, Zhiwei Ai, Cao Yi, Xiao Li, Huawei Wang

Journal of System Simulation

Abstract: Three-dimensional physical field data exploration visualization based on large scale complex geometric surface is of great value in three-dimensional electromagnetic simulation applications. Research was proposed which was suitable for massively parallel processing technology of three-dimensional data exploration. The concept of dual-data-source and data filtering policies was introduced based on contracts. Clipping algorithms based on spatial bounding box and data probing algorithm can support accurate three-dimensional data profiling for complex surface geometry. Research results have been applied to significant practical applications, such as the fuselage characteristics of electric field distribution analysis and high value targets within the seeker's accurate …

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Research On Space Environment Simulation Technology Based On Mobile Platform, Xiaofei Hu, Zhou Yang, Pengfei Li, Jiwei Xu, Xianguang Xue Aug 2020

Research On Space Environment Simulation Technology Based On Mobile Platform, Xiaofei Hu, Zhou Yang, Pengfei Li, Jiwei Xu, Xianguang Xue

Journal of System Simulation

Abstract: Based on the study of the spatial visualized simulation, a novel visualized simulation technology of spatial objects built on mobile platform was developed. Critical technologies include the organization, scheduling and mapping with the background of 3D starry sky, calculation and visualized simulation of spacecraft orbit, and storage, organization, dynamic scenario-based updated rendering of 3D digital earth mega geographic data. A fractionized tile algorithm covering the scope of screen was proposed. Projection ranged on the screen was taken as the criteria of fractionation of tiles in the algorithm. Testing results show that the fractionation is correct. Spatial simulation system …

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Real-Time Rendering Of Large-Scale River In Inland River Ship Simulator, Xiaoming Zhai, Yin Yong, Helong Shen Aug 2020

Real-Time Rendering Of Large-Scale River In Inland River Ship Simulator, Xiaoming Zhai, Yin Yong, Helong Shen

Journal of System Simulation

Abstract: To improve the reality of river visual in inland river ship simulator, a method of rendering large scale river which could be applied for inland river ship simulator was proposed. The river flowing field was built though the conception of stream function, and the algorithm of Poisson disk sampling was used to control the distribution of river flowing field. This could balance the relationship between efficiency and effect of river surface. The parallelism and programmability of GPU was adopt to render river surface. The results show the river flowing field generated by algorithm of stream function can reflect …

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Simulation System For Testing Ship Dynamic Positioning Control Algorithm, Xiaobin Qian, Yin Yong, Helong Shen, Xiaofeng Sun, Xiufeng Zhang Aug 2020

Simulation System For Testing Ship Dynamic Positioning Control Algorithm, Xiaobin Qian, Yin Yong, Helong Shen, Xiaofeng Sun, Xiufeng Zhang

Journal of System Simulation

Abstract: To overcome the disadvantage of ship dynamic positioning control algorithm tests on sea trials, which features high risk, long debugging period and high expense, a simulation system for testing ship dynamic positioning control algorithm was designed. Motion mathematical model of dynamic positioning vessel and ocean disturbance model were established. The function requirements were proposed based on the characteristic of DP vessel movement. Architecture and implementation of the simulation system were introduced. Testing process and the related interface was descripted. A simulation was conducted on a DP supply vessel, which shows that: the simulation system can verify the effectiveness …

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Circular Space-Filling Algorithm For Hierarchical Data Visualization, Kun Hou, Zhilong Li, Yuchao Feng, Chen Yi Aug 2020

Circular Space-Filling Algorithm For Hierarchical Data Visualization, Kun Hou, Zhilong Li, Yuchao Feng, Chen Yi

Journal of System Simulation

Abstract: The existed Circle Packing methods mainly take the style of top-down to arrange all the nodes. When the nodes of different layer was arranged, the scaling and translation would cause relative high time complexity of the algorithm, and the size proportional discordance of nodes of different father nodes but the same layer, and it also causes the problems like defective tightness between the layouts of father nodes and child nodes. To solve problems above, on the basis of summarizing methods of arranging brother nodes of the same layer, the algorithm——CRCA(Circle and Rectangle Center Algorithm) was proposed, which took the …

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Antenna Model In Simulation Of Spacecraft, Ti Zhou, Miao Yi, Sun Jun Aug 2020

Antenna Model In Simulation Of Spacecraft, Ti Zhou, Miao Yi, Sun Jun

Journal of System Simulation

Abstract: To give a solution how to catch relay satellite by spacecraft in the simulation system of manned craft, several 2D craft models were studied in the simulation software based on HLA, and some sufficient and necessary conditions and the methods were given to compute the visibility of relay satellite according to these models. On these methods, 3D antenna model and the orbit and attitude model of spacecraft were researched, and 3D antenna model was given with attitude information of craft. Finally, matrix translations were used to translate some vectors to the same reference frame, and the visibility was decided …

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Parallel Rendering Of Massive Aircraft Cad Models, Dunming Tan, Guoting Cao, Juanfang Lang, Yang Shuo Aug 2020

Parallel Rendering Of Massive Aircraft Cad Models, Dunming Tan, Guoting Cao, Juanfang Lang, Yang Shuo

Journal of System Simulation

Abstract: A parallel rendering method was presented with PC clusters in order to render massive aircraft CAD models in real time with high resolution. PC clusters were used for sort-first based rendering, BVH tree was built for efficient frustum culling, DID screens were utilized for high resolution display. In addition, multi-CPUs were exploited for thread based parallel out-of-core paging, frustum culling, BVH tree building and rendering. The experimental results show that by this parallel rendering PC clusters consists of 15 PC nodes, aircraft CAD models with 1.7 million of triangles can be rendered in real-time with resolution of 6800* …

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Lattice Boltzmann Fluid Simulation Based On Parameters, Zhongxiao Guo, Huiwen Liu, Xuemei Liu, Gao Yang Aug 2020

Lattice Boltzmann Fluid Simulation Based On Parameters, Zhongxiao Guo, Huiwen Liu, Xuemei Liu, Gao Yang

Journal of System Simulation

Abstract: In computational fluid dynamics (CFD), the lattice Boltzmann Method (LBM) has become the mainstream method of fluid numerical simulation based on Navier-Stokes equations. The visualization of numerical results and the real-time rendering of fluid animation could provide a visual method for data analysis. A velocity field drawn method for two-dimensional visualization was proposed based on LBGK equation and D2Q9 model design algorithm model, transforming floating-point fluid velocity value into the intensity values, which was used by the RGBA color rendering method. For three-dimensional visualization, Particle Level Set Method (PLSM) was used to track the fluid surface and coupled it …

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Research On Online Simulation Technology Of Intelligent Distribution Network Based On Distributed Component Service, Xueshun Ye, Wanxing Sheng, Xiaoli Meng, Keyan Liu, Yinglong Diao Aug 2020

Research On Online Simulation Technology Of Intelligent Distribution Network Based On Distributed Component Service, Xueshun Ye, Wanxing Sheng, Xiaoli Meng, Keyan Liu, Yinglong Diao

Journal of System Simulation

Abstract: Simulation architecture of intelligent distribution network was investigated based on component service, Service Oriented Architecture computing framework, modules coordination mechanism and component deployment and realization method were proposed. And data interactive interface, transmission and integration method with online data resources were proposed. Meanwhile, distribution network simulation model, including photovoltaic, wind power and other distributed generation was established, which designed online power flow, fault calculation, reliability, reactive power optimization, distributed generation locating and sizing function module. An online simulation system of intelligent distribution network was realized on basis of the architecture and method above. Through a 10 kV …

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