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19th IEEE International Conference on Software Quality, Reliability and Security (QRS)

作者： Scheibmeir, Jim Malaiya, Yashwant K. Colorado State Univ Ft Collins CO 80523 USA

ISBN: (纸本)9781728139258

Digital twins are software implementations of their physical counterparts. These software representations act through application program interfaces (APIs) to the physical devices they monitor, engage with and possibly control. Here a development model is proposed to ensure the desired reliability and performance of the API which is critical to the overall success of the Digital Twin.

关键词： application programming interface API Digital twin test automation software quality

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Generated DB call-level-interfaces - application-specific access optimization by means of binding flexibility

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Informatik - Forschung und Entwicklung 2000年第2期15卷 67-82页

作者： Härder, Theo Nink, Udo Ritter, Norbert Universität Kaiserslautern 67653 Kaiserslautern Postfach 3049 Germany

application programming interfaces (API) for database systems should preserve both the strengths of the database management system and of the programming languages. In addition to this general objective, innovative concepts of both domains as well as requirements of advanced application areas like CAD and software development must be observed. Our approach of generated call-level-interfaces is supposed to contribute to bringing closer together the type systems of object-relational database systems and object-oriented programming languages. Besides generating interfaces it supports application-specific configuration for optimization purposes. In this article, we describe generation/configuration of (generated) call-level-interfaces as well as their exploitation. Furthermore, we give some empirical results, showing possible performance gains. The latter can be achieved by application-specific use of early bindings (of data manipulation operations) as well as of pointer swizzling and prefetching mechanisms. © Springer-Verlag 2000.

关键词： application programming interface Binding time Database systems Generative methods Object orientation

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Drone Inspection Flight Path Generation from 3D CAD Models: Power Plant Boiler Case Study

Drone Inspection Flight Path Generation from 3D CAD Models: ...

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AIAA Science and Technology Forum and Exposition (AIAA SciTech)

作者： Ortega, A. G. Reyes-Munoz, J. McGee, M. Choudhuri, A. Flores-Abad, A. Univ Texas El Paso Ctr Space Explorat & Technol Res Mech Engn Dept El Paso TX 79968 USA Univ Texas El Paso Ctr Space Explorat & Technol Res Elect & Comp Engn Dept El Paso TX 79968 USA Univ Texas El Paso Ctr Space Explorat & Technol Res El Paso TX 79968 USA

ISBN: (数字)9781624105951

ISBN: (纸本)9781624105951

Robotic technologies for inspection purposes of large-scale structures have grown in interest. Such technologies are encouraged to reduce the risk in which human operators are involved and to reduce costs due to downtime of the equipment. In the Energy sector, high interest is placed on powerplant components where their correct operation is paramount. Inspired in the synthetic vision systems for aerial vehicles that use three-dimensional space (3D) to provide pilots with clear and intuitive means of understanding their flying environment, here we propose the use of the 3D Computer Aided Design (CAD) model of structural components of a power plant to define an off-line flight path for Unmanned Aerial Vehicles (UAVs). This method is feasible to implement because nowadays the CAD model of structural elements is readily available. Since this work focuses on structural inspection, only the surface characteristics of the model are required. To acquire, analyze and process the 3D model, first, the STL file is produced to obtain surface points and vectors normal to the surface. Later, by introducing other variables such as wall offset and controlled trajectory between each outline and each subsequent layer, the flight path is generated. This method would support efforts where the UAV is required to fly with no GPS available and/or beyond line of sight (BLOS). The effort was conducted using the MATLAB software and the multiple processes involved are discussed in detail. The final trajectory was validated using the Gazebo simulator which employs robust kinematic and dynamic models.

关键词： Power Plants Computer Aided Design Unmanned Aerial Vehicle Boilers application programming interface Structural Element Synthetic Vision System Yaw Quadrotor Helicopter Robotics

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Towards a Framework for Parametric Models and Geometric Sensitivity Computations with SU2 and pyCAPS

Towards a Framework for Parametric Models and Geometric Sens...

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AIAA Aviation Forum

作者： Shen, Yiren Patel, Harsh C. Alonso, Juan J. Galbraith, Marshall C. Stanford Univ Dept Aeronaut & Astronaut Stanford CA 94305 USA MIT Dept Aeronaut & Astronaut Cambridge MA 02139 USA

ISBN: (数字)9781624107047

ISBN: (纸本)9781624107047

Shape design optimization relies on obtaining objective and constraint functional sensitivities to geometric parameters in order to explore the design space effectively. To facilitate computer-aided design (CAD) applications in industry, this study presents a workflow for effectively handling geometric constraints and computing analytic sensitivities. The workflow is capable of computing parametric sensitivities by combines geometric sensitivities obtained using Engineering Sketch Pad with adjoint surface sensitivities from the SU2 adjoint solver through a dot product within the pyCAPS framework. The effectiveness and limitations of this workflow are evaluated through three test cases, including a preliminary demonstration of a shape optimization problem in wing design. The results indicate that the conceptual effectiveness of the proposed workflow, while noting the need for further improvement in the mesh generation routine.

关键词： Computer Aided Design Multidisciplinary Design and Optimization Shape Optimization Computing Rectangular Wing Mesh Generation Proper Orthogonal Decomposition application programming interface Aerodynamic Shape Optimization Angle of Attack

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A Simulation-Based Development and Verification Architecture for Micro UAV Teams and Swarms

A Simulation-Based Development and Verification Architecture...

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AIAA Science and Technology (SciTech) Forum and Exposition

作者： Akcakoca, Mehmet Atici, Bilge Mirac Gever, Bapk Oguz, Sinan Demir, Mustafa Saldiran, Emre Yuksek, Burak Koyuncu, Emre Yeniceri, Ramazan Inalhan, Gokhan STM Def Technol Engn Inc Dept Artificial Intelligence & Data Fus TR-06510 Ankara Turkiye Istanbul Tech Univ ITU Aerosp Res Ctr TR-34469 Istanbul Turkiye Istanbul Tech Univ Dept Aeronaut Engn TR-34469 Istanbul Turkiye

ISBN: (数字)9781624105784

ISBN: (纸本)9781624105784

In this work, we present an unmanned aerial vehicle (UAV) simulation-based, hardware and software development and verification architecture structured around the Robot Operating System (ROS). One of the key expectations of such a system is a graceful increase in architectural and computational complexity as the number of vehicles and vehicle complexity increases. In addition, the system is expected to provide the ability to test and verify algorithms both at the software and hardware level before real flight operations. This requirement also couples with the requested flexibility of updating the models and the algorithms based on the results coming from real operations. As such, the designed architecture allows joint simulation and testing at both hardware and software layers for multiple vehicle and swarm operations. Specifically, the architecture consists of distinct and networked layers where hardware elements such as autopilot systems (e.g., Pixhawk, Ardupilot etc.), ground stations and external motion capture/localization systems (e.g., Vicon, Otus Tracker etc.) are integrated around the ROS simulation shell. In addition, the dynamics, sensor models, motion planning and other features can be driven by highly parallel MATLAB/Simulink models. Visualization and visual sensing is obtained through linking of virtual reality with simulation environments such as Gazebo and Airsim. This highly reconfigurable architecture allows research teams to work on multidisciplinary areas such as modeling, control, computer vision, artificial intelligence and machine learning within the same simulation and test environment.

关键词： Unmanned Aerial Vehicle application programming interface Proximity Sensors Ground Station Robots Reinforcement Learning Operating Systems Computer Vision Artificial Intelligence Motion Planning

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Counter-archiving Facebook

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EUROPEAN JOURNAL OF COMMUNICATION 2020年第3期35卷 249-264页

作者： Ben-David, Anat Open Univ Israel Dorothy De Rothschild CampusOne Univ RdPOB 808 IL-4353701 Raanana Israel

The article proposes archival thinking as an analytical framework for studying Facebook. Following recent debates on data colonialism, it argues that Facebook dialectically assumes a role of a new archon of public records, while being unarchivable by design. It then puts forward counter-archiving - a practice developed to resist the epistemic hegemony of colonial archives - as a method that allows the critical study of the social media platform, after it had shut down researcher's access to public data through its application programming interface. After defining and justifying counter-archiving as a method for studying datafied platforms, two counter-archives are presented as proof of concept. The article concludes by discussing the shifting boundaries between the archivist, the activist and the scholar, as the imperative of research methods after datafication.

关键词： application programming interface archive datafication Facebook methods

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Improving on service-customizing for applications in PGPS-based IntServ/RSVP architecture

Improving on service-customizing for applications in PGPS-ba...

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1st International Conference on Computer Networks and Mobile Computing

作者： Yan, C Gu, BX Ma, XJ Gu, GQ Southeast Univ Minist Educ Key Lab Comp Network & Informat Integrat Nanjing Peoples R China

ISBN: (纸本)0769513816

The future Internet is expected to support applications with quality of service (QoS) requirements. For this end several mechanisms are suggested in the IETF to support signaling, one of the most promising among them is IntServ. In this paper, we study the relationship between the QoS implementing mechanism and application demands, and make a set of an improved application interface beyond the stand RSVP API. Our goal is to provide an API friendly to applications, through extracting the key elements from the traffic parameters and reservation parameters which should be opaque to applications.

关键词： Internet quality of service application program interfaces protocols service-customization quality of service IETF IntServ resource reservation protocol RSVP application programming interface Internet

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NETCDF - A DEFACTO, STANDARDIZED FRAMEWORK FOR ANALYTICAL DATA EXCHANGE, STORAGE, AND ARCHIVAL

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Symposium on Computerized Chemical Data Standards - Databases, Data Interchange, and Information Systems

作者： LYSAKOWSKI, R DIGITAL EQUIPMENT CORP LAB AIDSS PROJECTMARLBOROUGHMA 01752

ISBN: (纸本)0803118767

The technical details and requirements of the Analytical Data Interchange and Storage Standards (ADISS) architecture is presented. From this architecture, the network Common Data Format (netCDF) was chosen to be the system most applicable for use by various standards group, such as the Analytical Instrument Association (AIA). The group's usage of the software framework, particularly in chromatography, led to its emergence as a defacto standard for data communications for these techniques. The capabilities of the netCDF system is described and some tools available to applies ADISS/netCDF to other analytical techniques are presented.

关键词： ANALYTICAL DATA STANDARDS EXCHANGE COMMUNICATIONS STORAGE ARCHIVING DATA ACCESS interface application programming interface DATA FORMATS ADISS DATA ARCHITECTURE INFORMATION MODEL

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Prediction and Analysis of Ground Stops with Machine Learning

Prediction and Analysis of Ground Stops with Machine Learnin...

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AIAA Science and Technology Forum and Exposition (AIAA SciTech)

作者： Mangortey, Eugene Puranik, Tejas G. Pinon, Olivia J. Mavris, Dimitri N. Georgia Inst Technol Aerosp Syst Design Lab Sch Aerosp Engn Atlanta GA 30332 USA Georgia Inst Technol Adv Syst Anal Sch Aerosp Engn Atlanta GA 30332 USA

ISBN: (数字)9781624105951

ISBN: (纸本)9781624105951

A flight is considered to be delayed when it arrives 15 or more minutes later than scheduled. Delays attributed to the National Airspace System are one of the most common type of delays. Such delays may be caused by Traffic Management Initiatives (TMI) such as Ground Stops (GS), issued at affected airports. Ground Stops are implemented to control air traffic volume to specific airports where the projected traffic demand is expected to exceed the airports' acceptance rate over a short period of time due to conditions such as inclement weather, volume constraints, closed runways, etc. Ground Stops can be considered to be the strictest Traffic Management Initiative (TMI), particularly because all flights destined to affected airports are grounded until conditions improve. Efforts have been made over the years to reduce the impact of Traffic Management Initiatives on airports and flight operations. However, these efforts have largely focused on other Traffic Management Initiatives such as Ground Delay Programs (GDP), due to their frequency and duration compared to Ground Stops. Limited work has also been carried out on Ground Stops because of the limited amount of time that traffic management personnel often have between planning and implementing Ground Stops and external factors that influence decisions of traffic management personnel. Consequently, this research primarily focuses on the prediction of weather-related Ground Stops at Newark Liberty International (EWR) and LaGuardia (LGA) airports, with the secondary goal of gaining insights into factors that influence their occurrence. It is expected that this research will provide stakeholders with further insights into factors that influence the occurrence of weather-related Ground Stops at both airports. This is achieved by benchmarking Machine Learning algorithms in order to identify the best suited algorithm(s) for the prediction models, and identifying and analyzing key factors that influence the occurrence of wea

关键词： Machine Learning Aviation System Performance Metrics Flight Information Exchange Model Flight Operation Runways Altimeter Federal Aviation Administration application programming interface Airspace Aviation

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Face Recognition Technology for Ubiquitous Computing Environment

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5th International Conference on Universal Access in Human-Computer Interaction held at the HCI International 2009

作者： Jeong, Kanghun Hong, Seongrok Joo, Ilyang Lee, Jaehoon Moon, Hyeonjoon Sejong Univ Sch Comp Engn Seoul South Korea

ISBN: (纸本)9783642027093

In this paper, we explore face detection and face recognition algorithms for ubiquitous computing environment. We develop algorithms for application programming interface (API) suitable for embedded system. The basic requirements include appropriate data format and collection of feature data to achieve efficiency of algorithm. Our experiment presents a face detection and face recognition algorithm for handheld devices. The essential part for proposed system includes;integer representation from floating point calculation. optimization of memory management scheme and efficient face detection performance on complex background scene.

关键词： ubiquitous computing environment face recognition face detection application programming interface algorithm optimization

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