381 research outputs found
System diagnosis using a bayesian method
Today’s engineering systems have become increasingly more complex. This
makes fault diagnosis a more challenging task in industry and therefore a
significant amount of research has been undertaken on developing fault
diagnostic methodologies. So far there already exist a variety of diagnostic
methods, from qualitative to quantitative. However, no methods have
considered multi-component degradation when diagnosing faults at the system
level. For example, from the point a new aircraft takes off for the first time all of
its components start to degrade, and yet in previous studies it is presumed that
apart from the faulty component, other components in the system are operating
in a healthy state. This thesis makes a contribution through the development of
an experimental fuel rig to produce high quality data of multi-component
degradation and a probabilistic framework based on the Bayesian method to
diagnose faults in a system with considering multi-component degradation. The
proposed method is implemented on the fuel rig data which illustrates the
applicability of the proposed method and the diagnostic results are compared
with the neural network method in order to show the capabilities and
imperfections of the proposed method
Skeleton Key: Image Captioning by Skeleton-Attribute Decomposition
Recently, there has been a lot of interest in automatically generating
descriptions for an image. Most existing language-model based approaches for
this task learn to generate an image description word by word in its original
word order. However, for humans, it is more natural to locate the objects and
their relationships first, and then elaborate on each object, describing
notable attributes. We present a coarse-to-fine method that decomposes the
original image description into a skeleton sentence and its attributes, and
generates the skeleton sentence and attribute phrases separately. By this
decomposition, our method can generate more accurate and novel descriptions
than the previous state-of-the-art. Experimental results on the MS-COCO and a
larger scale Stock3M datasets show that our algorithm yields consistent
improvements across different evaluation metrics, especially on the SPICE
metric, which has much higher correlation with human ratings than the
conventional metrics. Furthermore, our algorithm can generate descriptions with
varied length, benefiting from the separate control of the skeleton and
attributes. This enables image description generation that better accommodates
user preferences.Comment: Accepted by CVPR 201
Recognizing and Curating Photo Albums via Event-Specific Image Importance
Automatic organization of personal photos is a problem with many real world
ap- plications, and can be divided into two main tasks: recognizing the event
type of the photo collection, and selecting interesting images from the
collection. In this paper, we attempt to simultaneously solve both tasks:
album-wise event recognition and image- wise importance prediction. We
collected an album dataset with both event type labels and image importance
labels, refined from an existing CUFED dataset. We propose a hybrid system
consisting of three parts: A siamese network-based event-specific image
importance prediction, a Convolutional Neural Network (CNN) that recognizes the
event type, and a Long Short-Term Memory (LSTM)-based sequence level event
recognizer. We propose an iterative updating procedure for event type and image
importance score prediction. We experimentally verified that image importance
score prediction and event type recognition can each help the performance of
the other.Comment: Accepted as oral in BMVC 201
Research on Copyright Protection of Film and TV Series in the Era of Short Video Deluge in China
Film and television works refer to audio files with or without words and video files that can be recorded, which also enjoy copyright. In this era of short video fast food, movies and TV series have become the benchmark in the cultural field with their mature scripts, careful shooting and large investment of funds and personnel. The copyright protection of movies and TV series is the foundation for the long-term development of China’s film and television industry, and has a great impact on the development of China’s cultural industry. With film and television dramas becoming increasingly popular subjects for short-form video creation on the Internet, short-form video users and film and television drama creators have formed a fierce collision of rights. However, in practice, the copyright protection of film and television series is faced with such problems as high creation costs and low transport costs, high difficulty and high cost for platforms to identify infringing videos, and no clear standards for judicial identification of infringement issues. Therefore, based on the concept of the haven principle and the principle of proportion, this paper uses the method of empirical research to analyze the current situation of film and television play copyright protection in our country by combining the Copyright Law and the short video infringement case of the popular the film “Nagatsuko”. Specifically, this includes legislation to clarify the limits and scope of judicial determination, refine the legal responsibilities of the three main parties, establish a legal risk prevention and control mechanism, and establish a benefit sharing mechanism between creators and short video users, thus promoting coordinated coexistence and win-win cooperation between users of short online videos and creators of TV dramas
Producing a Standard Dataset of Speed Climbing Training Videos Using Deep Learning Techniques
This dissertation presents a methodology for recording speed climbing
training sessions with multiple cameras and annotating the videos with relevant
data, including body position, hand and foot placement, and timing. The
annotated data is then analyzed using deep learning techniques to create a
standard dataset of speed climbing training videos. The results demonstrate the
potential of the new dataset for improving speed climbing training and
research, including identifying areas for improvement, creating personalized
training plans, and analyzing the effects of different training methods.The
findings will also be applied to the training process of the Jiangxi climbing
team through further empirical research to test the findings and further
explore the feasibility of this study.Comment: 2023 3rd International Conference on Innovative Talents Training and
Sustainable Developmen
A Bayesian approach to fault identification in the presence of multi-component degradation
Fault diagnosis typically consists of fault detection, isolation and identification. Fault detection and isolation determine the presence of a fault in a system and the location of the fault. Fault identification then aims at determining the severity level of the fault. In a practical sense, a fault is a conditional interruption of the system ability to achieve a required function under specified operating condition; degradation is the deviation of one or more characteristic parameters of the component from acceptable conditions and is often a main cause for fault generation. A fault occurs when the degradation exceeds an allowable threshold. From the point a new aircraft takes off for the first time all of its components start to degrade, and yet in almost all studies it is presumed that we can identify a single fault in isolation, i.e. without considering multi-component degradation in the system. This paper proposes a probabilistic framework to identify a single fault in an aircraft fuel system with consideration of multi-component degradation. Based on the conditional probabilities of sensor readings for a specific fault, a Bayesian method is presented to integrate distributed sensory information and calculate the likelihood of all possible fault severity levels. The proposed framework is implemented on an experimental aircraft fuel rig which illustrates the applicability of the proposed method
Improving Timeliness in the Neglected Tropical Diseases Preventive Chemotherapy Donation Supply Chain through Information Sharing: A Retrospective Empirical Analysis
BACKGROUND: Billions of doses of medicines are donated for mass drug administrations in support of the World Health Organization’s “Roadmap to Implementation,” which aims to control, eliminate, and eradicate Neglected Tropical Diseases (NTDs). The supply chain to deliver these medicines is complex, with fragmented data systems and limited visibility on performance. This study empirically evaluates the impact of an online supply chain performance measurement system, “NTDeliver,” providing understanding of the value of information sharing towards the success of global health programs. METHODS: Retrospective secondary data were extracted from NTDeliver, which included 1,484 shipments for four critical medicines ordered by over 100 countries between February 28, 2006 and December 31, 2018. We applied statistical regression models to analyze the impact on key performance metrics, comparing data before and after the system was implemented. FINDINGS: The results suggest information sharing has a positive association with improvement for two key performance indicators: purchase order timeliness (β = 0.941, p = 0.003) and—most importantly—delivery timeliness (β = 0.828, p = 0.027). There is a positive association with improvement for three variables when the data are publicly shared: shipment timeliness (β = 2.57, p = 0.001), arrival timeliness (β = 2.88, p = 0.003), and delivery timeliness (β = 2.82, p = 0.011). CONCLUSIONS: Our findings suggest that information sharing between the NTD program partners via the NTDeliver system has a positive association with supply chain performance improvements, especially when data are shared publicly. Given the large volume of medicine and the significant number of people requiring these medicines, information sharing has the potential to provide improvements to global health programs affecting the health of tens to hundreds of millions of people
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