Academic literature on the topic 'OpenMDAO'

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Journal articles on the topic "OpenMDAO"

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Chung, Hayoung, John T. Hwang, Justin S. Gray, and H. Alicia Kim. "Topology optimization in OpenMDAO." Structural and Multidisciplinary Optimization 59, no. 4 (February 14, 2019): 1385–400. http://dx.doi.org/10.1007/s00158-019-02209-7.

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Vidner, Olle, Robert Pettersson, Johan A. Persson, and Johan Ölvander. "MULTIDISCIPLINARY DESIGN OPTIMIZATION OF A MOBILE MINER USING THE OPENMDAO PLATFORM." Proceedings of the Design Society 1 (July 27, 2021): 2207–16. http://dx.doi.org/10.1017/pds.2021.482.

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AbstractThis paper proposes an optimization framework based on the OpenMDAO software library intended for engineer-to-order products and applies it to the conceptual design of a Mobile Miner. A Mobile Miner is a complex machine and a flexible alternative to Tunnel Boring Machines for small-scale tunneling and mining applications. The proposed framework is intended for use in early design and quotation stages with the objective to get fast estimates of important product characteristics, such as excavation rate and cutter lifetime. The ability to respond fast to customer requests is vital when offering customized products for specific applications and thereby to stay competitive on the global market. This is true for most engineer-to-order products and especially for mining equipment where each construction project is unique with different tunnel geometries and rock properties. The presented framework is applied to a specific use-case where the design of the miner's cutter wheel is in focus and a set of Pareto optimal designs are obtained. Furthermore, the framework extends the capabilities of OpenMDAO by including support for mixed-variable formulations and it supports an exploratory approach to design optimization.
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Gray, Justin S., John T. Hwang, Joaquim R. R. A. Martins, Kenneth T. Moore, and Bret A. Naylor. "OpenMDAO: an open-source framework for multidisciplinary design, analysis, and optimization." Structural and Multidisciplinary Optimization 59, no. 4 (March 1, 2019): 1075–104. http://dx.doi.org/10.1007/s00158-019-02211-z.

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Delbecq, Scott, Marc Budinger, and Aurélien Reysset. "Benchmarking of monolithic MDO formulations and derivative computation techniques using OpenMDAO." Structural and Multidisciplinary Optimization 62, no. 2 (March 11, 2020): 645–66. http://dx.doi.org/10.1007/s00158-020-02521-7.

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MIYAZAWA, Naoya, Toru TAKAHASHI, Masaki TANIGAWA, Hiroshi ISAKARI, and Toshiro MATSUMOTO. "Parametric optimisation for 3D acoustic problems using time-domain fast boundary element method and OpenMDAO." Proceedings of Conference of Tokai Branch 2020.69 (2020): 119. http://dx.doi.org/10.1299/jsmetokai.2020.69.119.

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He, Jiang-Zhou, Wen-Guang Chen, Guang-Ri Chen, Wei-Min Zheng, Zhi-Zhong Tang, and Han-Dong Ye. "OpenMDSP: Extending OpenMP to Program Multi-Core DSPs." Journal of Computer Science and Technology 29, no. 2 (March 2014): 316–31. http://dx.doi.org/10.1007/s11390-014-1433-x.

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Rapf, Dietmar. "Standards im Datenmanagement ASAM ODS und openMDM." ATZextra 21, S2 (May 2016): 32–39. http://dx.doi.org/10.1007/s35778-016-0005-9.

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Ramírez-Acosta, AlejandroA, MireyaS García-Vázquez, and Sunil Kumar. "Streaming Media Portability with the Emerging Support OpenMAX." IETE Technical Review 28, no. 2 (2011): 146. http://dx.doi.org/10.4103/0256-4602.76139.

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Barba, Jesus, David La Fuente, Fernando Rincon, Francisco Moya, and Juan Lopez. "Openmax hardware native support for efficient multimedia embedded systems." IEEE Transactions on Consumer Electronics 56, no. 3 (August 2010): 1722–29. http://dx.doi.org/10.1109/tce.2010.5606318.

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Wang, Chao, Bailing Wang, Yunxiao Sun, Yuliang Wei, Kai Wang, Hui Zhang, and Hongri Liu. "Intrusion Detection for Industrial Control Systems Based on Open Set Artificial Neural Network." Security and Communication Networks 2021 (August 18, 2021): 1–14. http://dx.doi.org/10.1155/2021/4027900.

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The security of industrial control systems (ICSs) has received a lot of attention in recent years. ICSs were once closed networks. But with the development of IT technologies, ICSs have become connected to the Internet, increasing the potential of cyberattacks. Because ICSs are so tightly linked to human lives, any harm to them could have disastrous implications. As a technique of providing protection, many intrusion detection system (IDS) studies have been conducted. However, because of the complicated network environment and rising means of attack, it is difficult to cover all attack classes, most of the existing classification techniques are hard to deploy in a real environment since they cannot deal with the open set problem. We propose a novel artificial neural network based-methodology to solve this problem. Our suggested method can classify known classes while also detecting unknown classes. We conduct research from two points of view. On the one hand, we use the openmax layer instead of the traditional softmax layer. Openmax overcomes the limitations of softmax, allowing neural networks to detect unknown attack classes. During training, on the other hand, a new loss function termed center loss is implemented to improve detection ability. The neural network model learns better feature representations with the combined supervision of center loss and softmax loss. We evaluate the neural network on NF-BoT-IoT-v2 and Gas Pipeline datasets. The experiments show our proposed method is comparable with the state-of-the-art algorithm in terms of detecting unknown classes. But our method has a better overall classification performance.
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Dissertations / Theses on the topic "OpenMDAO"

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Shi, Xin. "Test and Assessment of Derivative Computation Architectures using OpenMDAO and its Application in a Real Airfoil Optimization Problem." Thesis, KTH, Numerisk analys, NA, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-237182.

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Optimization problems are widespread in everyday life and engineering science. In the engineering optimization domain, the problems are usually modelled with an objective function. To solve these kinds of optimization problems, there are two main classes of optimization algorithms that are used: gradient-based algorithms and gradient-free algorithms. We will focus on gradient-based algorithms where the computation of derivatives is a critical step in the process. In this thesis, we present five different methods for computing the derivatives. These are the finite-differences method (FD), the complex-step method (CS), the automatic-differentiation method (AD), and two analytical methods – the direct and adjoint methods. We demonstrate the procedures involved in these methods in a test case and show their implementation using NASA’s Open source framework for Multidisciplinary Analysis and Optimization (OpenMDAO). Finally, we test and assess their performance in OpenMDAO by modelling a real airfoil problem.
Test och bedömning av derivatberäkningsarkitekturer som använ-der OpenMDAO och dess tillämpning i ett verkligt problem för flygplansoptimering. Optimeringsproblemen är utbredda i vardagsliv och ingenjörsvetenskap. I ingenjörsoptimeringsteknik modelleras problemen vanligtvis med en objektiv funktion. För att lösa dessa slags ingenjörsoptimeringsproblem finns två huvudkategorier av optimeringsalgoritmer: gradientbaserade algoritmer och gradientfria algoritmer. Vi kommer att fokusera på gradientbaserade algoritmer där beräkningen av derivatan är ett kritiskt steg i processen. I denna avhandling presenterar vi fem olika metoder för att beräkna derivatan. Dessa är så kallade Finita differensmetoden (FD), komplexa stegmetoden (CS), den automatiska differentieringsmetoden (AD) och två analytiska metoder - direkt och så kallade adjoint - metoder. Vi demonstrerar hela proceduren med dessa metoder på testfall och visar deras genomförande med hjälp av NASA:s mjukvara Open Source Framework MultiDisciplinary Analy-sis and Optimization (OpenMDAO). Slutligen testar och utvärderar vi deras prestanda i OpenMDAO genom att modellera ett verkligt problem med flygblad.
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Кодочигов, Дмитро Олексійович. "Огляд безкоштовного програмного забезпечення для проведення економіко-математичних досліджень." Thesis, Луцький національний технічний університет, 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/42009.

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Skládaný, Vojtěch. "Technologie IEEE802.15.4, ZigBee a příklady jejích aplikací." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217678.

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The main goals of diploma thesis are application and realization of tool for projection and installation wireless networks according to IEEE802.15.4. The thesis is specialized in construction of transmitter and receiver device in term of mobility and visualization of data measured in terrain. Than the software support for measuring and control appropriate periphery are summarised and described. The system is defined in C programming language and uses OpenMAC library. Last part of thesis is focus on practical measurement and testing tool for projection and installation wireless network.
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Mráz, Ľubomír. "Realizace bezdrátové senzorové sítě s mikrokontroléry Atmel AVR." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218273.

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This diploma thesis describes the standard IEEE802.15.4 and Zigbee for wireless sensor networks. These norms are described in detail in the first two chapters. The main priority of the wireless sensor networks is to minimize the power of the devices and the price while maximizing the reliability of the data transfer. Minimum consumption is provided by the significantly lowered complexity in comparison to the standard wireless networks. Further, the design of the concept of the complex and universal hardware platform focused on intelligent building is described. Software implementation of those norms is described in the chapters five and six. Finally, comparison of the designed hardware platform and the other commercial platforms is described in the last chapter.
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Chen, Ji-Ming, and 陳濟銘. "Realization of an OpenMAX(TM) standard media player on dual-core SoC platform." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/03440199014647870915.

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碩士
國立清華大學
資訊系統與應用研究所
95
Because development of multimedia platform is flourishing, the consumers’ demands for vedio, audio, image and 3D applications on the hardware platform increases constantly. This class of product requires high performance processing.In order to satisfy the consumers’ demands, a variety of hardware solutions has evolved. One of the chanllenges with all of these architectural variants is to develop efficient code. In general, these hardware platforms shall provide compilers. But it is difficult to bring the abilities of the hardware into full play only via compiler. When much software will be ported to new platforms, the codes of softwares must be re-written and optimized. The effect of this inefficiently in implementation is to delay the introduction of new products, increase development costs and reduce product quality. Eventually, it will slow down innovation and development in the multimedia domain at a time when market demand is growing. In order to solve this issue, the OpenMAX�� Working Group has been formed by the Khronos Group, to define a set of standard, open APIs for multimedia applications. The goal of this open standard is to reduce the cost and complexity of porting multimedia software to new processors and architectures. The advantage of this open standard is to be compatibly with multimedia applications on different platforms. The comman functions that different programs use will not be re-written. It will be possible for software and hardware developer community to focus on differentiating their products. The goal of this paper is to use OpenMAX�� IL APIs to integrate MP3 decoder library and ALSA library into player developed via these APIs on dual-core SoC platform. We will research the portability stressed by OpenMAX�� through the system implementation, and to observe the overheads of implementation via OpenMAX�� IL API. Eventually, to estimate what effects of software performance were caused by using OpenMAX�� IL APIs.
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Li-HaoLin and 林立浩. "Implementation and Optimization H.264 Decoder based on OpenMAX(TM) DL for PACDSP." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/38025853052775019834.

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碩士
國立清華大學
資訊工程學系
95
With the arrival of the multimedia, and the improvement of IC industry, the functions of the new generation PMP (portable Media Player) is becoming stronger and stronger. It is no doubt that the powerful functions of multimedia are expected. There are many kinds of multimedia, including music/sound effect, audio, picture (static image), video (dynamic image), 2D/3D animation, etc. The most mobile multimedia devices have several abilities. First, they support H.264, MPEG-4, MP3, VC1, and AAC which are the main stream of image and audio codec. Second, they support the standard of wireless communication, such as GSM, GPRS, 3G, or WiMAX on the cell-phone platform. These technologies mentioned above need many kinds of process ability and more complicated design of circuit. If each of these technologies is designed individually, it is definitely impossible to reach the goals of small size and the portability. Thus SOC with integration ability is applied on the mobile media device extensively. However, because these devices need the cooperation on hardware and software, two important issues about efficiency and energy saving are worth of being considered. The most popular PMP architecture is multi-core processor that has one MPU (Main Processor Unit) plus one or more DSP (Digital Signal Processor). OpenMAXTM is a unified standard released by Khronos group. There are two important interfaces. One is DL (Development Layer) and the other one is IL (Integration Layer). The major advantage is that these two interfaces can cross platforms and accelerate the performance of hardwares when the users and programmers process multimedia codec. The main motivation of this thesis is to accelerate the performance of processing multimedia. The platform of the experiment was called PACDSP platform which was developed by ITRI. The testing was under the environment of PACISS simulator. The multimedia codec adopted H.264 decoder, which followed OpenMAXTM DL standard. Then the author designed one library by PACDSP assembly code and implemented the algorithm as well as optimization. Therefore, the upper users can call this designed library to communicate with the PACDSP hardware more conveniently.
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Tseng, Wei-Tzi, and 曾維姿. "Implementation of H.264 Decoder Based on OpenMAX(TM) DL Standard on Dual-Core SoC Platform." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/12104508647942402105.

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碩士
國立清華大學
資訊工程學系
96
With the growing development and popular exercise of wireless network, multimedia applications provided on mobile devices have increased gradually, including voice, music, image, video, and the interaction by the communication network. It is now an important issue to accomplish a system architecture with multi-processors to deal with different requests from multimedia applications. Today, heterogeneous dual-core architecture has been a popular research and implementation on mobile devices. It refers to a Main Processor Unit(MPU) cooperates with a Digital Signal Processor(DSP), which takes charge in complex numerical computation procedures, to meet the requests of communication and multimedia applications on mobile devices. When porting multimedia applications on different platforms, developers usually need to re-design and re-write those codes, which will be time-consuming. To solve this problem, the Khronos Group has defined a set of standards and Application Programming Interfaces (APIs), called OpenMAX(TM), to provide portability for multimedia applications. With two main interfaces: Integration Layer and Development Layer, OpenMAX(TM) APIs enables effective development of media codec implementations, regardless of underlying hardware architecture[4]. The main research of this thesis is to implement H.264 baseline profile decoder on a Dual-Core platform, combined with an ARM processor as the MPU, and a PACDSP developed in STC of ITRI. We adopt PACDSP Assembly language and follow the definition of OpenMAX(TM) DL to design a set of libraries for developers to easily invoke H.264 decoder functions. Then we discuss the influence of function allocation using OpenMAX(TM) definition, and analysis the efficiency of the H.264 decoder on both Single-Processor and our Dual-Core platform. Finally, we discuss the impact that the communication mechanism between MPU and DSP has brought to the system implementation.
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Book chapters on the topic "OpenMDAO"

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Kanth, Rishav, and Basant Kumar Gupta. "Design of FSAPDS Using Multidisciplinary Design Optimization (OpenMDAO)." In Lecture Notes in Mechanical Engineering, 235–47. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5432-2_20.

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Newmarch, Jan. "OpenMAX IL." In Linux Sound Programming, 235–75. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2496-0_13.

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Newmarch, Jan. "OpenMAX Buffers on the Raspberry Pi." In Raspberry Pi GPU Audio Video Programming, 137–52. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2472-4_11.

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Newmarch, Jan. "OpenMAX Audio on the Raspberry Pi." In Raspberry Pi GPU Audio Video Programming, 203–44. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2472-4_14.

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Newmarch, Jan. "OpenMAX on the Raspberry Pi Concepts." In Raspberry Pi GPU Audio Video Programming, 79–81. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2472-4_7.

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Newmarch, Jan. "OpenMAX Components on the Raspberry Pi." In Raspberry Pi GPU Audio Video Programming, 83–111. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2472-4_8.

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Newmarch, Jan. "OpenMAX on the Raspberry Pi State." In Raspberry Pi GPU Audio Video Programming, 113–28. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2472-4_9.

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Newmarch, Jan. "OpenMAX Video Processing on the Raspberry Pi." In Raspberry Pi GPU Audio Video Programming, 181–201. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2472-4_13.

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Newmarch, Jan. "OpenMAX IL Client Library on the Raspberry Pi." In Raspberry Pi GPU Audio Video Programming, 129–36. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2472-4_10.

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Newmarch, Jan. "Rendering OpenMAX to OpenGL on the Raspberry Pi." In Raspberry Pi GPU Audio Video Programming, 245–59. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2472-4_15.

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Conference papers on the topic "OpenMDAO"

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Chung, Hayoung, John T. Hwang, Justin S. Gray, and Hyunsun A. Kim. "Implementation of topology optimization using openMDAO." In 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-0653.

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Hwang, John T. "Reconfigurable model execution in the OpenMDAO framework." In 18th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-3821.

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Coroneos, Rula, and Shantaram Pai. "Deterministic Design Optimization of Structures in OpenMDAO Framework." In 12th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference and 14th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-5482.

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Heath, Christopher, and Justin Gray. "OpenMDAO: Framework for Flexible Multidisciplinary Design, Analysis and Optimization Methods." In 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
20th AIAA/ASME/AHS Adaptive Structures Conference
14th AIAA
. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-1673.

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Matunaga, Marco Aurélio Leonel, and João Luiz F. Azevedo. "Wing Optimization using the OpenMDAO Framework and Low-Fidelity Aerodynamics." In 25th International Congress of Mechanical Engineering. ABCM, 2019. http://dx.doi.org/10.26678/abcm.cobem2019.cob2019-0971.

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Gray, Justin S., Jeff Chin, Tristan Hearn, Eric S. Hendricks, Thomas M. Lavelle, and Joaquim R. R. A. Martins. "Thermodynamics For Gas Turbine Cycles With Analytic Derivatives in OpenMDAO." In 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-0669.

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Gray, Justin, Kenneth Moore, and Bret Naylor. "OpenMDAO: An Open Source Framework for Multidisciplinary Analysis and Optimization." In 13th AIAA/ISSMO Multidisciplinary Analysis Optimization Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-9101.

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Gray, Justin S., Tristan A. Hearn, and Bret A. Naylor. "Using Graph Coloring To Compute Total Derivatives More Efficiently in OpenMDAO." In AIAA Aviation 2019 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-3108.

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Patel, Harsh C., David J. Neiferd, Juan J. Alonso, Joshua D. Deaton, James Akkala, and John W. Gallman. "Aeroelastic Wing Design Sensitivity Analysis with SU2-Nastran Coupling in OpenMDAO." In AIAA SCITECH 2022 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2022. http://dx.doi.org/10.2514/6.2022-2241.

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Gray, Justin S., Tristan A. Hearn, Kenneth T. Moore, John Hwang, Joaquim R. R. A. Martins, and Andrew Ning. "Automatic Evaluation of Multidisciplinary Derivatives Using a Graph-Based Problem Formulation in OpenMDAO." In 15th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2014. http://dx.doi.org/10.2514/6.2014-2042.

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