The Advanced Quantitative Precipitation Information (AQPI) system provides San Francisco Bay Area users with a single source of meteorological observations ranging from national weather model forecasts to local high r...
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ISBN:
(纸本)9798350358810;9798350358803
The Advanced Quantitative Precipitation Information (AQPI) system provides San Francisco Bay Area users with a single source of meteorological observations ranging from national weather model forecasts to local high resolution radar quantitative precipitation estimations (QPE). As a complex and sociotechnical system, AQPI lends itself to following the Complex, Large-scale, Interconnected, Open, Sociotechnical (CLIOS) process defined by Joseph Sussman. Following the CLIOS process and separating the physical model from the institutional sphere, a systemsengineering approach naturally aligns with the Model-Based systemsengineering (MBSE) methodology. Using block diagrams and internal block diagrams to capture the physical system, the engineer expresses the institutional sphere using behavioral modeling of use cases and activity diagrams. An MBSE behavioral analysis model for AQPI was developed in 2021 based upon the project concept. This preliminary model defined a foundation for the development of an AQPI Digital Twin. systems mature from concept through implementation, and Digital Twins are no different. In 2022, AQPI hosting transitioned from National Oceanic and Atmospheric Administration (NOAA) to the Cooperative Institute for Research in the Atmosphere (CIRA). With the completion of the transition, the AQPI model required an update to match implementation as of April 2023. Using capabilities-based requirements analysis, the updated AQPI model matures a step closer to becoming the Digital Twin of the AQPI system and a single source of truth for development and system evaluation in support of operations and maintenance.
In this paper we propose a novel "chess board" spectrum division technique. This technique enables increasing range resolution by using multiple channels with different LO frequencies. In the proposed system...
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ISBN:
(纸本)9798350348194;9798350348187
In this paper we propose a novel "chess board" spectrum division technique. This technique enables increasing range resolution by using multiple channels with different LO frequencies. In the proposed system we demonstrate 200 GHz system bandwidth. Block schemes for transceivers with different signal waveforms (PMCW, OFDM) are shown. Both waveforms are suitable for proposed modulation technique and can achieve higher range resolution. Obtained that OFDM signal has significant better result in a side lobe level after first matched filtration, but has more complex transmitter part. Proposed frequency doubler at the end of transmitter makes receiver architecture identical for both signal waveform. Maximum allowed noise distribution along frequency is estimated. Future problems with the Doppler frequency shift are considered, regarding to the current existing frequency doubler schemes.
In this paper, a new approach is introduced which combines Eigenvalue Assignment, State Dependent Riccati Equation (SDRE) and Sliding Mode Control (smc) methods for nonlinear systems. In the classical SDRE based smc (...
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In this paper, we propose a method for generating height-map images that can achieve surface texture with the haptic sensation desired by the user. A texture plate was generated based on the height-map image, and a ha...
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Mutual learning algorithm can be an efficient mechanism for improving the machine learning and neural network efficiency in a multi-agent system. Specifically, in many cases, where the system cannot be trained using a...
Knowledge Graph Completion (KGC) endeavors to use existing knowledge graph data for predicting missing elements in triples. Recently, due to the efficiency of graph neural networks (GNNs) in capturing topological stru...
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This paper presents a comprehensive approach to the development of an efficient control system for smart homes, addressing the issues of previous smart home systems, including automation, compatibility, and user-frien...
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The migration of industrial control systems to an edge-cloud hosted on factory premises can reduce the operation costs of a plant and increase its flexibility thanks to computation scalability and use of cloud-native ...
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ISBN:
(纸本)9798350358513;9798350358520
The migration of industrial control systems to an edge-cloud hosted on factory premises can reduce the operation costs of a plant and increase its flexibility thanks to computation scalability and use of cloud-native operation concepts. A limiting factor for the realization of edge-cloud based control systems is the network delay between process and edge-cloud controller. This paper studies the effects of the migration of a controller to the edge-cloud. In particular, it proposes to treat network delays as disturbances and to use the framework of quadratic boundedness to analyze the system robustness. For this purpose, a controller is extended with linear and non-linear prediction strategies and tested in unfavorable network conditions. The results of the work demonstrate the effectiveness of the approach and provide a solid base for new methods to design edge-cloud control systems.
Haptic perception is highly important for immersive teleoperation of robots, especially for accomplishing manipulation tasks. We propose a low-cost haptic sensing and rendering system, which is capable of detecting an...
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In contemporary society, Smart Water Supply systems (SWSS) are Cyber-Physical systems whose deployment plays a pivotal role in ensuring the provision of high-quality water services. The imperative of safeguarding thes...
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ISBN:
(纸本)9798350358513;9798350358520
In contemporary society, Smart Water Supply systems (SWSS) are Cyber-Physical systems whose deployment plays a pivotal role in ensuring the provision of high-quality water services. The imperative of safeguarding these systems against cyber-physical attacks cannot be overstated, as their security and reliability directly impact public health and safety. This study introduces a proactive security-by-design approach that abstracts SWSS as a Discrete Event system and verifies their vulnerability against power consumption tracking-malware attack by applying the principle of opacity. We assume that the malicious intruder can understand the system architecture and can access its power consumption information and aims at inferring one or more states in which the water provisioning is at risk, i.e, the system secret. The proposed approach consists in defining the Switching Output Automaton (SOA) of the designed SWSS and verify the current state opacity of the SWSS based on the definition of the evolution automaton and the observer of the defined SOA. In case the designed system results non-opaque, the SWSS can be redesigned prior its implementation. The method is applied to a testbed emulating a scaled-down SWSS for which the secret is a set of critical states whose attack can compromise the proper water provisioning to customers. The results demonstrate that our approach can effectively support the security-by-design of SWSS and enhance their resilience against sophisticated attacks.
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