According to the actual condition of the ship electric propulsion system, the fault tree was built via analyzing the fault characteristics and reasons of the components of the system. the analytic hierarchy process wa...
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ISBN:
(纸本)9781467376808
According to the actual condition of the ship electric propulsion system, the fault tree was built via analyzing the fault characteristics and reasons of the components of the system. the analytic hierarchy process was used to calculate the weight of the fault reasons and formed a corresponding intelligent fault tree. Some rules which were used to build the knowledge base of fault diagnosis expert system in Access could be extracted from the intelligent tree. the fault diagnosis system made use of the width-first search strategy and forward reasoning control strategy. the BP neural networks algorithm was used to make up the lack of a learning disability. the system could help the workers to diagnose and repair the faults of the marine electric propulsion system more quickly and reduce the cost.
the development of modern information technology has led to the digital and intelligent transformation of many traditional industries. In order to face the challenge of difficult transition, liner shipping industry is...
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In the face of the rapid development of wireless technology in the Internet of things (IoT), the communication capacity that wireless spectrum can carry is increasing. this has led to wireless signal recognition becom...
In the face of the rapid development of wireless technology in the Internet of things (IoT), the communication capacity that wireless spectrum can carry is increasing. this has led to wireless signal recognition becoming a key technology for intelligent spectrum management. this paper proposes a deep learning model for wireless signal recognition, called Hybrid net. this model consists of a residual block that extracts local information from the sample and a Transformer block that extracts global information from the sample. these two blocks are added together through a residual unit to form a more complete representation of the feature space. It also avoids the problem of high model complexity and long training time caused by using data in frequency domain format. In order to better simulate actual communication environments, in-phase and quadrature (IQ) and IQ with random phase offset datasets were constructed for training and testing. Experimental results show that the proposed Hybrid net can achieve recognition accuracy of over 80% at low signal to noise ratios (SNRs grater than −6 dB). the Hybrid net even reach 100% at 4 dB. In addition, Hybrid net also demonstrated good generalization performance on different datasets.
A major challenge for traffic management systems is the inference of traffic flow in regions of the network for which there is little data. In this paper, GPS-based vehicle locator data from a fleet of 40-60 roving am...
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A major challenge for traffic management systems is the inference of traffic flow in regions of the network for which there is little data. In this paper, GPS-based vehicle locator data from a fleet of 40-60 roving ambulances are used to estimate traffic congestion along a network of 20,000 streets in the city of Ottawa, Canada. Essentially, the road network is represented as a directed graph and a belief propagation algorithm is used to interpolate measurements from the fleet. the system incorporates a number of novel features. It makes no distinctions between freeways and surface streets, incorporates both historical and live sensor data, handles user inputs such as road closures and manual speed overrides, and is computationally efficient - providing updates every 5 to 6 minutes on commodity hardware. Experimental results are presented which address the key issue of validating the performance and reliability of the system.
Medical entity relation extraction is of great significance for medical text data mining and medical knowledge graph. However, medical field requires very high data accuracy rate, the current medical entity relation e...
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ISBN:
(纸本)9783319598581;9783319598574
Medical entity relation extraction is of great significance for medical text data mining and medical knowledge graph. However, medical field requires very high data accuracy rate, the current medical entity relation extraction system is difficult to achieve the required accuracy. A main technical difficulty lies in how to obtain high-precision medical data, and automatically generate annotated training sample set. In this paper, a medical entity relation automatic extraction system based on weak supervision is proposed. At first, we designed a visual annotation tool, it can automatically generate crawl scripts, crawling the medical data from the site where the entity and its attributes are Separate stored. then, based on the acquired data structure, we propose a weakly supervised hypothesis to automatically generate positive sample training data. Finally, we use CNN model to extract medical entity relation. Experiments show that the method is feasible and accurate.
the rise of social networking services (SNS) has reshaped communication dynamics in cyberspace, yet it has also exacerbated the proliferation of online hate speech due to the anonymity and fluidity these platforms off...
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Space debris has become a major potential safety hazard to the on-orbit spacecraft, which must be considered when launching a spacecraft. A simulation verification system which ground-based and can simulate the debris...
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Nowadays, human population face increasing water pollution problems, so treating and managing this resource is crucial. Wastewater Treatment Plants (WWTPs) provide essential services for human life since they treat wa...
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Recently, urban rail transportation is constantly developing to intelligent urban rail based on the Internet of things, artificial intelligence, and high-speed communication. Long Term Evolution for Urban Rail Transpo...
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One of the toughest issues in medically produced image processing and its analysis is generally the process of brain tumor segmentation. In order to accurately outline the areas of the tumor, brain tumor segmentation ...
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