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AIAA Science and Technology Forum and Exposition (AIAA SciTech Forum)

作者： Patel, Akash Safdari, Masoud Illinois Rocstar LLC Champaign IL 61820 USA Univ Illinois Aerosp Engn Dept Champaign IL 61801 USA

ISBN: (数字)9781624106095

ISBN: (纸本)9781624106095

Adaptive mesh refinement (AMR) offers a practical solution to reduce the computational cost and memory requirement of numerical simulations that use computational meshes. In this work, we introduce a novel smart methodology for adaptive mesh refinement. Smart adaptive refinement blends classical AMR with machine learning to address some of the known issues of the conventional approaches. We provide an algorithm for adaptive refinement. Subsequently, we introduce a modular object-oriented structure for our smart AMR algorithm. Then we present procedures used for the training of a smart AMR model. The study follows with a demonstration of preliminary numerical studies indicating the feasibility of performing adaptive mesh refinement on a few demonstrative problems selected from the CFD domain. Finally, we conclude with a few comments about future work.

关键词： Adaptive Mesh Refinement Computational Fluid Dynamics Machine Learning Convolutional Neural Network Flow Velocity Vortex Structure application programming interface Mesh Generation Data Structures Turbine Blades

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IMPLEMENTATION OF HARDWARE AGNOSTIC FAST PATH PACKET PROCESSING

IMPLEMENTATION OF HARDWARE AGNOSTIC FAST PATH PACKET PROCESS...

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International Conference on Research Advances in Integrated Navigation Systems (RAINS)

作者： Nikhila, Athaluri Sanjeetha, R. Satheesha, N. K. Kurian, Scaria MS Ramaiah Inst Technol Comp Networks Bangalore Karnataka India MS Ramaiah Inst Technol Dept Comp Sci Bangalore Karnataka India Nokia Solut & Networks India Pvt Ltd R&D Bangalore Karnataka India

ISBN: (纸本)9781509011117

The core functionality of a network is packet processing. Fast Path is the functional area that handles processing of packets. The Fast Path functionalities is predominantly hardware driven and is very difficult to port on other platforms. This is because the APIs (application programming interfaces) used for developing fast path applications is system on chip specific. To enable the easy migration of fast path applications across hardware requires a harmonized API set. Open data Plane (ODP) is open source initiative in this direction. The Fast Path packet processing can be implemented using Open Data Plane (ODP) application programming interfaces (APIs) to achieve hardware or platform independence.

关键词： Packet processing Fast Path Open Data Plane application programming interface Hardware Independence

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Optical flow for flight and wind tunnel background oriented schlieren imaging 55

Optical flow for flight and wind tunnel background oriented ...

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55th AIAA Aerospace Sciences Meeting

作者： Smith, Nathanial T. Heineck, James T. Schairer, Edward T. ACI/Experimental Aero-Physics Branch AerospaceComputing Inc. NASA Ames Research Center M/S 260-1 Moffett FieldCA94035 United States Experimental Aero-Physics Branch NASA Ames Research Center M/S 260-1 Moffett FieldCA94035 United States

ISBN: (数字)9781624104473

ISBN: (纸本)9781624104473

Background oriented schlieren images have historically been generated by calculating the observed pixel displacement between a wind-on and wind-off image pair using normalized cross-correlation. This work uses optical flow to solve the displacement fields which generate the schlieren images. A well established method used in the computer vision com- munity, optical flow is the apparent motion in an image sequence due to brightness changes. The regularization method of Horn and Schunck is used to create schlieren images using two data sets: a supersonic jet plume/shock interaction from the NASA Ames Unitary Plan Wind Tunnel, and a transonic fight test of a T-38 aircraft using a naturally occurring background, performed in conjunction with NASA Ames and Armstrong Research Centers. Results are presented and contrasted with those using normalized cross-correlation. The optical flow schlieren images are found to provided significantly more detail. We apply the method to an additional data set to demonstrate both the broad applicability and limitations of the technique. © 2017, American Institute of Aeronautics and Astronautics Inc. All rights reserved.

关键词： Supersonic Wind Tunnels Background Oriented Schlieren Supersonic Aircraft NASA Ames Research Center Image Registration Flight Testing Freestream Mach Number Particle Image Velocimetry application programming interface Computational Fluid Dynamics

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An Adaptive Framework for Applying Cloud Computing In Virtual Learning Environment at Education a Case Study of "AASTMT"

An Adaptive Framework for Applying Cloud Computing In Virtua...

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International Conference on Communications, Management, and Information Technology (ICCMIT)

作者： Hegazy, Abdel Fatah Khedr, Ayman E. Al Geddawy, Yasser Arab Acad Sci Technol & Maritime Transport Coll Comp & Informat Technol Cairo Egypt Future Univ Fac Comp & Informat Technol Dept Informat Syst Cairo Egypt Arab Acad Sci Technol & Maritime Transport Dept Business Informat Syst Cairo Egypt

This study aims to provide a Cloud Computing (CC) proposed framework using application programming interface (API's) to deliver connectivity and interaction of Software as a Service (SaaS) in Virtual Learning Environment (VLE) system at higher education institute. The framework is adopted and implemented to enhance the existing VLE to meet the incremental increasing of users' needs and expectations. Different research's methodologies and techniques are used to measure the students and instructors satisfaction, and to measure the impact of the adoption of CC on business value for VLE as well. In addition, the study identifies and explores the idea of covering the gap between the advance of adopting CC as a new technology and the benefits of implementing cloud techniques in education. The findings of implementing the adopted framework equate the study expectations, where the user's satisfaction significantly increased compared with the existing system. The users found that the system performance and response to their tasks are improved. Meanwhile, the users found that the new adopted system make it easier for them to achieve their academic activities and goals. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/). Peer-review under responsibility of Universal Society for Applied Research

关键词： Cloud Computing Virtual Learning Environments Software as a Service application programming interface

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Study on a MEMS CAD system based on SolidWorks

Study on a MEMS CAD system based on SolidWorks

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6th International Conference on e-Engineering and Digital Enterprise Technology

作者： Zhang, C. F. Lu, D. J. Jiang, Z. D. Xi An Jiao Tong Univ State Key Lab Mfg Syst Engn Xian 710049 Peoples R China Xian Technol Univ Sch Mech & Elect Engn Xian 710032 Peoples R China

ISBN: (纸本)9780878494705

To enable desianers to construct geometric models of MEMS devices in a straightforward environment and get mask and process flow automatically, a 3D MEMS CAD system for surface micromachined devices is proposed based on traditional design software - SolidWorks. With application programming interfaces (APIs) of SolidWorks, component modules and databases of the system are developed with Visual Basic, such as geometric model design module, mask and process flow generation module, process simulation module. 3D feature database and material database. Their development method is discussed in this paper. A practical example shows that surface micromachined devices can be designed efficiently in the system without tedious fabrication process.

关键词： micro-electro-mechanical system SolidWorks CAD system application programming interface mask process flow

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Sketch-to-Solution: A Case Study in RCS Aerodynamic Interaction

Sketch-to-Solution: A Case Study in RCS Aerodynamic Interact...

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AIAA Science and Technology Forum and Exposition (AIAA SciTech)

作者： Kleb, Bil Schoenenberger, Mark Korzun, Ashley M. Park, Michael A. NASA Langley Res Ctr Computat Aerothermodynam Hampton VA 23681 USA NASA Langley Res Ctr Atmospher Flight & Entry Syst Branch Hampton VA 23681 USA

ISBN: (数字)9781624105951

ISBN: (纸本)9781624105951

Thanks to recent advances in the fields of anisotropic grid adaptation, error estimation, and geometry modeling, a sketch-to-solution work flow is now possible for viscous computational fluid dynamic (CFD) simulations. With this workflow, a CFD application engineer provides geometry, boundary conditions, and flow parameters;and the sketch-to-solution process yields a CFD simulation through automatic, error-based, grid adaptation. To explore the benefits of this nascent capability, a conventional manual grid generation work flow is compared to this new automatic grid generation work flow for a given engineering question: What are the aerodynamic interactions caused by the reaction control system (RCS) on an entry vehicle? This case study indicates that while the automatic grid generation sketchto-solution process is not yet mature, it is preferred over a manual grid generation work flow because it greatly reduces manual labor, eliminates many opportunities for human error, and provides grid sensitivity information.

关键词： Reaction Control System Computational Fluid Dynamics Drag Coefficient Nozzle Walls FUN3D Unstructured Grid Wind Tunnel Models CAD Software application programming interface Discharge Coefficient

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A configurable distributed speech recognition system

A configurable distributed speech recognition system

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2nd Biennial Workshop on DSP for Mobile and Vehicular Systems

作者： Xu, Haitian Tan, Zheng-Hua Dalsgaard, Paul Mattethat, Ralf Lindberg, Borge Aalborg Univ Ctr TelelnFrastruktur Speech & Multimedia Commun Aalborg Denmark Inst Technol Aarhus Denmark

ISBN: (纸本)9780387335032

The growth in wireless communication and mobile devices has supported the development of distributed speech recognition (DSR) technology. During the last decade this has led to the establishment of ETSI-DSR standards and an increased interest in research aimed at systems exploiting DSR. So far, however, DSR-based systems executing on mobile devices are only in their infancy. One of the reasons is the lack of easy-to-use software development packages. This chapter presents a prototype version of a configurable DSR system for the development of speech enabled applications on mobile devices. The system is implemented on the basis of the ETSI-DSR advanced front-end and the SPHINX IV recognizer. A dedicated protocol is defined for the communication between the DSR client and the recognition server supporting simultaneous access from a number of clients. This makes it possible for different clients to create and configure recognition tasks on the basis of a set of predefined recognition modes.

关键词： distributed speech recognition noise robustness application programming interface fixed-point optimization

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After the "APIcalypse': social media platforms and their fight against critical scholarly research

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INFORMATION COMMUNICATION & SOCIETY 2019年第11期22卷 1544-1566页

作者： Bruns, Axel Queensland Univ Technol Digital Media Res Ctr Brisbane Qld Australia

In the aftermath of the Cambridge Analytica controversy, social media platform providers such as Facebook and Twitter have severely restricted access to platform data via their application programming interfaces (APIs). This has had a particularly critical effect on the ability of social media researchers to investigate phenomena such as abuse, hate speech, trolling, and disinformation campaigns, and to hold the platforms to account for the role that their affordances and policies might play in facilitating such dysfunction. Alternative data access frameworks, such as Facebook's partnership with the controversial Social Science One initiative, represent an insufficient replacement for fully functional APIs, and the platform providers' actions in responding to the Cambridge Analytica scandal raise suspicions that they have instrumentalised it to actively frustrate critical, independent, public interest scrutiny by scholars. Building on a critical review of Facebook's public statements through its own platforms and the mainstream media, and of the scholarly responses these have drawn, this article outlines the societal implications of the APIcalypse', and reviews potential options for scholars in responding to it.

关键词： Cambridge Analytica Social Science One Facebook Twitter application programming interface social media

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Virtual Control Panel API: An Artificial Intelligence Driven Directive to Allow Programmers and Users to Create Customizable, Modular, and Virtual Control Panels and Systems to Control IoT Devices via Augmented Reality 23rd

Virtual Control Panel API: An Artificial Intelligence Driven...

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23rd International Conference on Human-Computer Interaction (HCII)

作者： Chopra, Shreya Univ Calgary Calgary AB T2N 1N4 Canada

ISBN: (纸本)9783030909635;9783030909628

An incremental tide in IoT devices prompts a centralized control system where physical controls such as buttons and knobs can become virtual and centralized via augmented reality: especially headset AR. I conduct a literature mapping to identify gaps and create a front-end based virtual control panel API tool to allow programmers and end-users to rapidly create headset augmented reality-based virtual control systems for physical devices. I probe on how an artificial intelligence back-end aids in such a system in terms of panel creation and automation as well as panel usage and control scenarios. I delve into use cases of the virtual control panel API including mass usage and specialized scenarios. Furthermore, I specify the guidelines for a requirements elicitation study for such a system along with potential points of derivation. Next, I probe into implications and limitations of such a system in terms of artificial intelligence, usage, and precision. My work has implications for programmers and users of a virtual control system backed by artificial intelligence for the purpose of controlling physical IoT devices in mass usage as well as in specialized scenarios.

关键词： Virtual control panel User centered design application programming interface API Artificial Intelligence Machine learning User experience design Augmented reality Virtual reality Control panel Control system Block programming Requirements elicitation Customization Internet of Things Consumer and industrial application domains Ethical and trustworthy AI Generative UX/UI design Human-centered AI

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Automatic Adaptive Approximation for Stencil Computations 2019

Automatic Adaptive Approximation for Stencil Computations

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28th International Conference on Compiler Construction (CC)

作者： Schmitt, Maxime Helluy, Philippe Bastoul, Cedric Univ Strasbourg Inria Strasbourg France

ISBN: (纸本)9781450362771

Approximate computing is necessary to meet deadlines in some compute-intensive applications like simulation. Building them requires a high level of expertise from the application designers as well as a significant development effort. Some application programming interfaces greatly facilitate their conception but they still heavily rely on the developer's domain-specific knowledge and require many modifications to successfully generate an approximate version of the program. In this paper we present new techniques to semi-automatically discover relevant approximate computing parameters. We believe that superior compiler-user interaction is the key to improved productivity. After pinpointing the region of interest to optimize, the developer is guided by the compiler in making the best implementation choices. Static analysis and runtime monitoring are used to infer approximation parameter values for the application. We evaluated these techniques on multiple application kernels that support approximation and show that with the help of our method, we achieve similar performance as non-assisted, hand-tuned version while requiring minimal intervention from the user.

关键词： Approximate Computing Compilation Code Optimization application programming interface Stencil Code

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