Business Implications for Reliability and Robustness in the Satellite Market

2003 ◽  
Author(s):  
Christopher Hoeber ◽  
G. van Ommering ◽  
D. Grybos ◽  
B. Kosinski ◽  
L. Wray
Keyword(s):  
Reliability And Robustness

Synthezis the strucrure of cloud computing system to control of mobile robots group

2016 ◽  
Vol 11 (1) ◽  
pp. 72-80
Author(s):  
O.V. Darintsev ◽  
A.B. Migranov
Keyword(s):  
Cloud Computing ◽  
Mobile Robots ◽  
Distinctive Feature ◽  
Information Exchange ◽  
High Performance ◽  
Computing System ◽  
Control Information ◽  
Cloud Computing System ◽  
Group Control ◽  
Reliability And Robustness

In article one of possible approaches to synthezis of group control of mobile robots which is based on use of cloud computing is considered. Distinctive feature of the offered techniques is adequate reflection of specifics of a scope and the robots of tasks solved by group in architecture of control-information systems, methods of the organization of information exchange, etc. The approach offered by authors allows to increase reliability and robustness of collectives of robots, to lower requirements to airborne computers when saving summary high performance in general.

Performance prediction of transonic axial multistage compressor based on one-dimensional meanline method

2021 ◽  
pp. 095765092199881
Author(s):  
Yingying Zhang ◽  
Shijie Zhang
Keyword(s):  
Experimental Data ◽  
Mass Flow ◽  
Flow Separation ◽  
Performance Prediction ◽  
Factor Model ◽  
Separation Method ◽  
Prediction Program ◽  
Blockage Factor ◽  
Reliability And Robustness ◽  
Work Done

This study proposes a 1D meanline program for the modeling of modern transonic axial multistage compressors. In this method, an improved blockage factor model is proposed. Work-done factor that varies with the compressor performance conditions is added in this program, and at the same time a notional blockage factor is kept. The coefficient of deviation angle model is tuned according to experimental data. In addition, two surge methods that originated from different sources are chosen to add in and compare with the new method called mass flow separation method. The salient issues presented here deal first with the construction of the compressor program. Three well-documented National Aerodynamics and Space Administration (NASA) axial transonic compressors are calculated, and the speedlines and aerodynamic parameters are compared with the experimental data to verify the reliability and robustness of the proposed method. Results show that consistent agreement can be obtained with such a performance prediction program. It was also apparent that the two common methods of surge prediction, which rely upon either stage or overall characteristic gradients, gave less agreement than the method called mass flow separation method.

Statistical Analysis of SHM Passive Sensing Systems

2015 ◽  
Vol 665 ◽  
pp. 241-244
Author(s):  
Marco Thiene ◽  
Zahra Sharif Khodaei ◽  
M.H. Aliabadi
Keyword(s):  
Statistical Analysis ◽  
Health Monitoring ◽  
Sensor Failure ◽  
Impact Detection ◽  
Sensing Systems ◽  
Detection And Identification ◽  
Passive Sensing ◽  
Service Load ◽  
Reliability And Robustness ◽  
Load Conditions

Structural Health Monitoring (SHM) techniques have gained an increased interest to be utilised alongside NDI techniques for aircraft maintenance. However, to take the SHM methodologies from the laboratory conditions to actual structures under real load conditions requires them to be assessed in terms of reliability and robustness. In this work, a statistical analysis is carried out for a passive SHM system capable of impact detection and identification. The sensitivity of the platform to parameters such as noise, sensor failure and in-service load conditions has been investigated and reported.

scholarly journals Closed-Surface Multifunctional Antireflective Coating Made from SiO2 with TiO2 Nanocomposites

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1367
Author(s):  
Zhiqiu Guo ◽  
Ze Zhu ◽  
Ya Liu ◽  
Changjun Wu ◽  
Hao Tu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Short Circuit ◽  
Sol Gel ◽  
Short Circuit Current ◽  
Closed Surface ◽  
Chain Structure ◽  
High Photocatalytic Activity ◽  
Current Gain ◽  
Antireflective Coating ◽  
Reliability And Robustness

An SiO2-TiO2 closed-surface antireflective coating was fabricated by the one-dipping method. TiO2 nanoparticles were mixed with a nanocomposited silica sol, which was composed of acid-catalyzed nanosilica networks and silica hollow nanospheres (HNs). The microstructure of the sol-gel was characterized by transmission electron microscopy. The silica HNs were approximately 40–50 nm in diameter with a shell thickness of approximately 8–10 nm. The branched-chain structure resulting from acidic hydrolysis grew on these silica HNs, and TiO2 was distributed inside this network. The surface morphology of the coating was measured by field emission scanning electron microscopy and atomic force microscopy. After optimization, transmittance of up to 94.03% was obtained on photovoltaic (PV) glass with a single side coated by this antireflective coating, whose refractive index was around 1.30. The short-circuit current gain of PV module was around 2.14–2.32%, as shown by the current-voltage (IV) curve measurements and external quantum efficiency (EQE) tests. This thin film also exhibited high photocatalytic activity. Due to the lack of voids on its surface, the antireflective coating in this study possessed excellent long-term reliability and robustness in both high-moisture and high-temperature environments. Combined with its self-cleaning function, this antireflective coating has great potential to be implemented in windows and photovoltaic modules.

SAMS: Stochastic Analysis With Minimal Sampling—A Fast Algorithm for Analysis and Design Under Uncertainty

2004 ◽  
Vol 127 (4) ◽  
pp. 558-571 ◽  
Author(s):  
A. Mawardi ◽  
R. Pitchumani
Keyword(s):  
System Performance ◽  
Stochastic Analysis ◽  
Sampling Method ◽  
Latin Hypercube Sampling ◽  
Analysis And Design ◽  
Process Outcomes ◽  
Input Parameters ◽  
Computationally Intensive ◽  
Uncertain Input ◽  
Reliability And Robustness

Design of processes and devices under uncertainty calls for stochastic analysis of the effects of uncertain input parameters on the system performance and process outcomes. The stochastic analysis is often carried out based on sampling from the uncertain input parameters space, and using a physical model of the system to generate distributions of the outcomes. In many engineering applications, a large number of samples—on the order of thousands or more—is needed for an accurate convergence of the output distributions, which renders a stochastic analysis computationally intensive. Toward addressing the computational challenge, this article presents a methodology of S̱tochastic A̱nalysis with M̱inimal S̱ampling (SAMS). The SAMS approach is based on approximating an output distribution by an analytical function, whose parameters are estimated using a few samples, constituting an orthogonal Taguchi array, from the input distributions. The analytical output distributions are, in turn, used to extract the reliability and robustness measures of the system. The methodology is applied to stochastic analysis of a composite materials manufacturing process under uncertainty, and the results are shown to compare closely to those from a Latin hypercube sampling method. The SAMS technique is also demonstrated to yield computational savings of up to 90% relative to the sampling-based method.

scholarly journals Robust and fast selective encryption for HEVC videos

2014 ◽  
Vol 10 (4) ◽  
pp. 221 ◽  
Author(s):  
Mokhtar Ouamri ◽  
Kamel M. Faraoun
Keyword(s):  
High Efficiency ◽  
Operating Mode ◽  
Advanced Encryption Standard ◽  
Selective Encryption ◽  
High Efficiency Video Coding ◽  
High Definition ◽  
Network Applications ◽  
Encryption Schemes ◽  
Visual Degradation ◽  
Reliability And Robustness

Emerging High efficiency video coding (HEVC) is expected to be widely adopted in network applications for high definition devices and mobile terminals. Thus, construction of HEVC's encryption schemes that maintain format compliance and bit rate of encrypted bitstream becomes an active security's researches area. This paper presents a novel selective encryption technique for HEVC videos, based on enciphering the bins of selected Golomb–Rice code’s suffixes with the Advanced Encryption Standard (AES) in a CBC operating mode. The scheme preserves format compliance and size of the encrypted HEVC bitstream, and provides high visual degradation with optimized encryption space defined by selected Golomb–Rice suffixes. Experimental results show reliability and robustness of the proposed technique.

scholarly journals Of two minds or one? A registered replication of Rydell et al. (2006)

2019 ◽  
Author(s):  
Tobias Heycke ◽  
Sarah Marie Gehrmann ◽  
Julia M. Haaf ◽  
Christoph Stahl
Keyword(s):  
Impression Formation ◽  
Evaluative Conditioning ◽  
Dual Process ◽  
Target Person ◽  
Implicit Measures ◽  
Process Theories ◽  
Dual Process Theories ◽  
Reliability And Robustness ◽  
Selective Influence ◽  
Behavioral Information

Evaluative conditioning (EC) is proposed as a mechanism of automatic preference acquisition in dual-process theories of attitudes (Gawronski & Bodenhausen, 2006; Rydell & McConnell, 2006). Evidence for the automaticity of EC comes from studies claiming EC effects for subliminally presented stimuli. An impression-formation study by Rydell and colleagues (2006) showed a selective influence of briefly presented primes on implicitly measured attitudes, whereas supraliminally presented behavioral information about the target person was reflected in explicit ratings. This finding is considered one of the strongest pieces of evidence for dual process theories (Sweldens, Corneille, & Yzerbyt, 2014), and it is therefore crucial to assess its reliability and robustness. The present study presents two registered replications of the Rydell et al. (2006) study. In contrast to the original findings, the implicit measures did not reflect the valence of the subliminal primes in both studies.

An assistive household robot – doing more than just cleaning

2014 ◽  
Vol 8 (2) ◽  
pp. 64-76 ◽  
Author(s):  
Julia Kantorovitch ◽  
Janne Väre ◽  
Vesa Pehkonen ◽  
Arto Laikari ◽  
Heikki Seppälä
Keyword(s):  
Elderly Care ◽  
Empirical Evaluation ◽  
Ageing Population ◽  
Vacuum Cleaner ◽  
Content Type ◽  
Technology Products ◽  
Sensing Technology ◽  
Starting Point ◽  
Novel Concept ◽  
Reliability And Robustness

Purpose – The purpose of this paper is to create new ideas for assistive technology products at home, especially products utilizing robotic consumer appliances available in the homes of elderly people. The work was founded on a reported increase in household robots as well as an ageing population in the industrialized world. Design/methodology/approach – Technology should be something that is perceived as belonging to our own world that fits our daily practices. Earlier studies show that in addition to cleaning functions, new household robots could change home routines and people's relationship to them. Taking the previous studies as a starting point, the paper proposes a vacuum cleaner robot as a platform for developing pervasive safety services and describe implementation of a conceptual prototype which brings the feeling of safety to an older person and their relatives by assisting in case of accidents. Moreover, the results are presented of an empirical evaluation of the prototype with end-users. Findings – It is proved that reasonably priced off-the-shelf components can be used to build the safety product demonstration model. The initial evaluation results, as well as referenced studies show that the acceptance rate of a household robot-based product is high, which is encouraging for further research in this domain. Also the paper could pinpoint areas that will require further work. Research limitations/implications – To add more practicality to the research and move towards product development, a strong industrial partner involved in household robotics would be needed. For increased reliability and robustness, more research is required in areas of advanced sensing technology and decision algorithms. Originality/value – A novel concept of a safety product for elderly care based on a vacuum cleaner robot is presented and an attempt is made to increase awareness that there will be a demand for such products.

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