186 research outputs found
Social Inclusion of Smart Transportation:Case of Shanghai
Master of Science i global ledelse - Nord universitet 202
Graph Flow: Cross-layer Graph Flow Distillation for Dual Efficient Medical Image Segmentation
With the development of deep convolutional neural networks, medical image
segmentation has achieved a series of breakthroughs in recent years. However,
the higher-performance convolutional neural networks always mean numerous
parameters and high computation costs, which will hinder the applications in
clinical scenarios. Meanwhile, the scarceness of large-scale annotated medical
image datasets further impedes the application of high-performance networks. To
tackle these problems, we propose Graph Flow, a comprehensive knowledge
distillation framework, for both network-efficiency and annotation-efficiency
medical image segmentation. Specifically, our core Graph Flow Distillation
transfer the essence of cross-layer variations from a well-trained cumbersome
teacher network to a non-trained compact student network. In addition, an
unsupervised Paraphraser Module is designed to purify the knowledge of the
teacher network, which is also beneficial for the stabilization of training
procedure. Furthermore, we build a unified distillation framework by
integrating the adversarial distillation and the vanilla logits distillation,
which can further refine the final predictions of the compact network.
Extensive experiments conducted on Gastric Cancer Segmentation Dataset and
Synapse Multi-organ Segmentation Dataset demonstrate the prominent ability of
our method which achieves state-of-the-art performance on these
different-modality and multi-category medical image datasets. Moreover, we
demonstrate the effectiveness of our Graph Flow through a new semi-supervised
paradigm for dual efficient medical image segmentation. Our code will be
available at Graph Flow
Smoothing Spline ANOVA Models and their Applications in Complex and Massive Datasets
Complex and massive datasets can be easily accessed using the newly developed data acquisition technology. In spite of the fact that the smoothing spline ANOVA models have proven to be useful in a variety of fields, these datasets impose the challenges on the applications of the models. In this chapter, we present a selected review of the smoothing spline ANOVA models and highlight some challenges and opportunities in massive datasets. We review two approaches to significantly reduce the computational costs of fitting the model. One real case study is used to illustrate the performance of the reviewed methods
FreMAE: Fourier Transform Meets Masked Autoencoders for Medical Image Segmentation
The research community has witnessed the powerful potential of
self-supervised Masked Image Modeling (MIM), which enables the models capable
of learning visual representation from unlabeled data. In this paper, to
incorporate both the crucial global structural information and local details
for dense prediction tasks, we alter the perspective to the frequency domain
and present a new MIM-based framework named FreMAE for self-supervised
pre-training for medical image segmentation. Based on the observations that the
detailed structural information mainly lies in the high-frequency components
and the high-level semantics are abundant in the low-frequency counterparts, we
further incorporate multi-stage supervision to guide the representation
learning during the pre-training phase. Extensive experiments on three
benchmark datasets show the superior advantage of our proposed FreMAE over
previous state-of-the-art MIM methods. Compared with various baselines trained
from scratch, our FreMAE could consistently bring considerable improvements to
the model performance. To the best our knowledge, this is the first attempt
towards MIM with Fourier Transform in medical image segmentation
The cosmic ray test of MRPCs for the BESIII ETOF upgrade
In order to improve the particle identification capability of the Beijing
Spectrometer III (BESIII),t is proposed to upgrade the current endcap
time-of-flight (ETOF) detector with multi-gap resistive plate chamber (MRPC)
technology. Aiming at extending ETOF overall time resolution better than 100ps,
the whole system including MRPC detectors, new-designed Front End Electronics
(FEE), CLOCK module, fast control boards and time to digital modules (TDIG),
was built up and operated online 3 months under the cosmic ray. The main
purposes of cosmic ray test are checking the detectors' construction quality,
testing the joint operation of all instruments and guaranteeing the performance
of the system. The results imply MRPC time resolution better than 100,
efficiency is about 98 and the noise rate of strip is lower than
1() at normal threshold range, the details are discussed and
analyzed specifically in this paper. The test indicates that the whole ETOF
system would work well and satisfy the requirements of upgrade
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