148 research outputs found
Fused Text Segmentation Networks for Multi-oriented Scene Text Detection
In this paper, we introduce a novel end-end framework for multi-oriented
scene text detection from an instance-aware semantic segmentation perspective.
We present Fused Text Segmentation Networks, which combine multi-level features
during the feature extracting as text instance may rely on finer feature
expression compared to general objects. It detects and segments the text
instance jointly and simultaneously, leveraging merits from both semantic
segmentation task and region proposal based object detection task. Not
involving any extra pipelines, our approach surpasses the current state of the
art on multi-oriented scene text detection benchmarks: ICDAR2015 Incidental
Scene Text and MSRA-TD500 reaching Hmean 84.1% and 82.0% respectively. Morever,
we report a baseline on total-text containing curved text which suggests
effectiveness of the proposed approach.Comment: Accepted by ICPR201
Adaptive fuzzy sliding mode command-filtered backstepping control for islanded PV microgrid with energy storage system
This study focuses on the control of islanded photovoltaic (PV) microgrid and design of a controller for PV system. Because the system operates in islanded mode, the reference voltage and frequency of AC bus are provided by the energy storage system. We mainly designed the controller for PV system in this study, and the control objective is to control the DC bus voltage and output current of PV system. First, a mathematical model of the PV system was set up. In the design of PV system controller, command-filtered backstepping control method was used to construct the virtual controller, and the final controller was designed by using sliding mode control. Considering the uncertainty of circuit parameters in the mathematical model and the unmodeled part of PV system, we have integrated adaptive control in the
controller to achieve the on-line identification of component parameters of PV system. Moreover, fuzzy control was used to approximate the unmodeled part of the system. In addition, the projection operator guarantees the boundedness of adaptive estimation. Finally, the control effect of designed controller was verified by MATLAB/Simulink software. By comparing with the control results of proportion-integral (PI) and other controllers, the advanced design of controller was verified
Adaptive fuzzy sliding mode command-filtered backstepping control for islanded PV microgrid with energy storage system
This study focuses on the control of islanded photovoltaic (PV) microgrid and design of a controller for PV system. Because the system operates in islanded mode, the reference voltage and frequency of AC bus are provided by the energy storage system. We mainly designed the controller for PV system in this study, and the control objective is to control the DC bus voltage and output current of PV system. First, a mathematical model of the PV system was set up. In the design of PV system controller, command-filtered backstepping control method was used to construct the virtual controller, and the final controller was designed by using sliding mode control. Considering the uncertainty of circuit parameters in the mathematical model and the unmodeled part of PV system, we have integrated adaptive control in the
controller to achieve the on-line identification of component parameters of PV system. Moreover, fuzzy control was used to approximate the unmodeled part of the system. In addition, the projection operator guarantees the boundedness of adaptive estimation. Finally, the control effect of designed controller was verified by MATLAB/Simulink software. By comparing with the control results of proportion-integral (PI) and other controllers, the advanced design of controller was verified
Label-Driven Denoising Framework for Multi-Label Few-Shot Aspect Category Detection
Multi-Label Few-Shot Aspect Category Detection (FS-ACD) is a new sub-task of
aspect-based sentiment analysis, which aims to detect aspect categories
accurately with limited training instances. Recently, dominant works use the
prototypical network to accomplish this task, and employ the attention
mechanism to extract keywords of aspect category from the sentences to produce
the prototype for each aspect. However, they still suffer from serious noise
problems: (1) due to lack of sufficient supervised data, the previous methods
easily catch noisy words irrelevant to the current aspect category, which
largely affects the quality of the generated prototype; (2) the
semantically-close aspect categories usually generate similar prototypes, which
are mutually noisy and confuse the classifier seriously. In this paper, we
resort to the label information of each aspect to tackle the above problems,
along with proposing a novel Label-Driven Denoising Framework (LDF). Extensive
experimental results show that our framework achieves better performance than
other state-of-the-art methods.Comment: Finding of EMNLP 2022 camera-read
Event-Triggered Multi-Lane Fusion Control for 2-D Vehicle Platoon Systems with Distance Constraints
This paper investigates the event-triggered fixedtime multi-lane fusion control for vehicle platoon systems with
distance keeping constraints where the vehicles are spread in
multiple lanes. To realize the fusion of vehicles in different lanes,
the vehicle platoon systems are firstly constructed with respect to
a two-dimensional (2-D) plane. In case of the collision and loss of
effective communication, the distance constraints for each vehicle
are guaranteed by a barrier function-based control strategy.
In contrast to the existing results regarding the command
filter techniques, the proposed distance keeping controller can
constrain the distance tracking error directly and the error
generated by the command filter is coped with by adaptive fuzzy
control technique. Moreover, to offset the impacts of the unknown
system dynamics and the external disturbances, an unknown
input reconstruction method with asymptotic convergence is
developed by utilizing the interval observer technique. Finally,
two relative threshold triggering mechanisms are utilized in the
proposed fixed-time multi-lane fusion controller design so as to
reduce the communication burden. The corresponding simulation
results also verify the effectiveness of the proposed strategy
Hi Sheldon! Creating Deep Personalized Characters from TV Shows
Imagine an interesting multimodal interactive scenario that you can see,
hear, and chat with an AI-generated digital character, who is capable of
behaving like Sheldon from The Big Bang Theory, as a DEEP copy from appearance
to personality. Towards this fantastic multimodal chatting scenario, we propose
a novel task, named Deep Personalized Character Creation (DPCC): creating
multimodal chat personalized characters from multimodal data such as TV shows.
Specifically, given a single- or multi-modality input (text, audio, video), the
goal of DPCC is to generate a multi-modality (text, audio, video) response,
which should be well-matched the personality of a specific character such as
Sheldon, and of high quality as well. To support this novel task, we further
collect a character centric multimodal dialogue dataset, named Deep
Personalized Character Dataset (DPCD), from TV shows. DPCD contains
character-specific multimodal dialogue data of ~10k utterances and ~6 hours of
audio/video per character, which is around 10 times larger compared to existing
related datasets.On DPCD, we present a baseline method for the DPCC task and
create 5 Deep personalized digital Characters (DeepCharacters) from Big Bang TV
Shows. We conduct both subjective and objective experiments to evaluate the
multimodal response from DeepCharacters in terms of characterization and
quality. The results demonstrates that, on our collected DPCD dataset, the
proposed baseline can create personalized digital characters for generating
multimodal response.Our collected DPCD dataset, the code of data collection and
our baseline will be published soon
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