198 research outputs found
Scalable Peaceman-Rachford Splitting Method with Proximal Terms
Along with developing of Peaceman-Rachford Splittling Method (PRSM), many
batch algorithms based on it have been studied very deeply. But almost no
algorithm focused on the performance of stochastic version of PRSM. In this
paper, we propose a new stochastic algorithm based on PRSM, prove its
convergence rate in ergodic sense, and test its performance on both artificial
and real data. We show that our proposed algorithm, Stochastic Scalable PRSM
(SS-PRSM), enjoys the convergence rate, which is the same as those
newest stochastic algorithms that based on ADMM but faster than general
Stochastic ADMM (which is ). Our algorithm also owns wide
flexibility, outperforms many state-of-the-art stochastic algorithms coming
from ADMM, and has low memory cost in large-scale splitting optimization
problems
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Obscuring masters : the vicissitude of Danwei and the shifting of social structures from Maoist to post-Maoist China
No abstract available.Geography and the Environmen
PIDS: Joint Point Interaction-Dimension Search for 3D Point Cloud
The interaction and dimension of points are two important axes in designing
point operators to serve hierarchical 3D models. Yet, these two axes are
heterogeneous and challenging to fully explore. Existing works craft point
operator under a single axis and reuse the crafted operator in all parts of 3D
models. This overlooks the opportunity to better combine point interactions and
dimensions by exploiting varying geometry/density of 3D point clouds. In this
work, we establish PIDS, a novel paradigm to jointly explore point interactions
and point dimensions to serve semantic segmentation on point cloud data. We
establish a large search space to jointly consider versatile point interactions
and point dimensions. This supports point operators with various
geometry/density considerations. The enlarged search space with heterogeneous
search components calls for a better ranking of candidate models. To achieve
this, we improve the search space exploration by leveraging predictor-based
Neural Architecture Search (NAS), and enhance the quality of prediction by
assigning unique encoding to heterogeneous search components based on their
priors. We thoroughly evaluate the networks crafted by PIDS on two semantic
segmentation benchmarks, showing ~1% mIOU improvement on SemanticKITTI and
S3DIS over state-of-the-art 3D models.Comment: Proceedings of the IEEE/CVF Winter Conference on Applications of
Computer Vision. 2023: 1298-130
AO-DETR: Anti-Overlapping DETR for X-Ray Prohibited Items Detection
Prohibited item detection in X-ray images is one of the most essential and
highly effective methods widely employed in various security inspection
scenarios. Considering the significant overlapping phenomenon in X-ray
prohibited item images, we propose an Anti-Overlapping DETR (AO-DETR) based on
one of the state-of-the-art general object detectors, DINO. Specifically, to
address the feature coupling issue caused by overlapping phenomena, we
introduce the Category-Specific One-to-One Assignment (CSA) strategy to
constrain category-specific object queries in predicting prohibited items of
fixed categories, which can enhance their ability to extract features specific
to prohibited items of a particular category from the overlapping
foreground-background features. To address the edge blurring problem caused by
overlapping phenomena, we propose the Look Forward Densely (LFD) scheme, which
improves the localization accuracy of reference boxes in mid-to-high-level
decoder layers and enhances the ability to locate blurry edges of the final
layer. Similar to DINO, our AO-DETR provides two different versions with
distinct backbones, tailored to meet diverse application requirements.
Extensive experiments on the PIXray and OPIXray datasets demonstrate that the
proposed method surpasses the state-of-the-art object detectors, indicating its
potential applications in the field of prohibited item detection. The source
code will be released at https://github.com/Limingyuan001/AO-DETR-test
Energy dissipation mechanism and damage model of marble failure under two stress paths
Marble conventional triaxial loading and unloading failure testing research is carried out to analyze the elastic strain energy and dissipated strain energy evolutionary characteristics of the marble deformation process. The study results show that the change rates of dissipated strain energy are essentially the same in compaction and elastic stages, while the change rate of dissipated strain energy in the plastic segment shows a linear increase, so that the maximum sharp point of the change rate of dissipated strain energy is the failure point. The change rate of dissipated strain energy will increase during unloading confining pressure, and a small sharp point of change rate of dissipated strain energy also appears at the unloading point. The damage variable is defined to analyze the change law of failure variable over strain. In the loading test, the damage variable growth rate is first rapid then slow as a gradual process, while in the unloading test, a sudden increase appears in the damage variable before reaching the rock peak strength. According to the deterioration law of damage and the impact of confining pressure on the elastic modulus, a rock damage constitutive model is established, which has a better fitting effect on the data in the loading and unloading failure processes
FADE: Enabling Federated Adversarial Training on Heterogeneous Resource-Constrained Edge Devices
Federated adversarial training can effectively complement adversarial
robustness into the privacy-preserving federated learning systems. However, the
high demand for memory capacity and computing power makes large-scale federated
adversarial training infeasible on resource-constrained edge devices. Few
previous studies in federated adversarial training have tried to tackle both
memory and computational constraints simultaneously. In this paper, we propose
a new framework named Federated Adversarial Decoupled Learning (FADE) to enable
AT on heterogeneous resource-constrained edge devices. FADE differentially
decouples the entire model into small modules to fit into the resource budget
of each device, and each device only needs to perform AT on a single module in
each communication round. We also propose an auxiliary weight decay to
alleviate objective inconsistency and achieve better accuracy-robustness
balance in FADE. FADE offers theoretical guarantees for convergence and
adversarial robustness, and our experimental results show that FADE can
significantly reduce the consumption of memory and computing power while
maintaining accuracy and robustness.Comment: Preprint versio
Effectiveness and potential mechanism of Jiawei-Xiaoyao-San for hyperthyroidism: a systematic review
Objectives: To evaluate the effectiveness and potential mechanism of traditional Chinese medicine Jiawei-Xiaoyao-San (JWXYS) as an adjunct or mono- therapy for antithyroid drugs (ATDs) in the treatment of hyperthyroidism.
Methods: Eight databases and three trial registries were searched from inception until May 2023. Randomized controlled trials (RCTs) were included and meta-analysis was conducted using RevMan 5.4 and Stata 14.0. The Cochrane risk of bias (ROB) tool 1.0 and GRADE tool was used for quality appraisal. The findings from case reports using mono-JWXYS and pharmacological studies were summarized in tables.
Results: Thirteen RCTs with 979 participants were included. The majority of the included studies were assessed as high risk of bias in one ROB domain. Compared with ATDs, JWXYS plus ATDs resulted in lower free triiodothyronine (FT3) (MD = -1.31 pmol/L, 95% CI [-1.85, -0.76]; low-certainty), lower free thyroxine (MD = -3.24 pmol/L, 95% CI [-5.06, -1.42]; low-certainty), higher thyroid stimulating hormone (MD = 0.42 mIU/L, 95% CI [0.26, 0.59]; low-certainty), higher effectiveness rate of traditional Chinese medicine syndrome (RR = 1.28, 95% CI [1.08, 1.52]; low-certainty), lower goiter score (MD = -0.66, 95% CI [-1.04, -0.29]; very low-certainty), lower thyrotrophin receptor antibody (SMD = -0.44, 95% CI [-0.73, -0.16]; low-certainty) and fewer adverse events (AEs) (RR = 0.34, 95% CI [0.18, 0.67]; moderate-certainty). Compared with regular dosage of ATDs, JWXYS plus half-dose ATDs resulted in fewer AEs (RR = 0.24, 95% CI [0.10, 0.59]; low-certainty). Compared with ATDs in 1 trial, JWXYS resulted in higher FT3, lower goiter score and fewer AEs. Three case reports showed that the reasons patients sought TCM-only treatment include severe AEs and multiple relapses. Three pharmacological studies demonstrated that JWXYS restored Th17/Treg balance, lowered deiodinases activity, regulated thyroid cell proliferation and apoptosis, and alleviated liver oxidative stress in mouse or rat models. Conclusion: JWXYS may enhance the effectiveness of ATDs for hyperthyroidism, particularly in relieving symptoms and reducing AEs. Mono-JWXYS is not recommended except in patients intolerant to ATDs. The findings should be interpreted with caution due to overall high risk of bias. Further pharmacological studies with more reliable models are needed
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