28 research outputs found
ALEX: Towards Effective Graph Transfer Learning with Noisy Labels
Graph Neural Networks (GNNs) have garnered considerable interest due to their
exceptional performance in a wide range of graph machine learning tasks.
Nevertheless, the majority of GNN-based approaches have been examined using
well-annotated benchmark datasets, leading to suboptimal performance in
real-world graph learning scenarios. To bridge this gap, the present paper
investigates the problem of graph transfer learning in the presence of label
noise, which transfers knowledge from a noisy source graph to an unlabeled
target graph. We introduce a novel technique termed Balance Alignment and
Information-aware Examination (ALEX) to address this challenge. ALEX first
employs singular value decomposition to generate different views with crucial
structural semantics, which help provide robust node representations using
graph contrastive learning. To mitigate both label shift and domain shift, we
estimate a prior distribution to build subgraphs with balanced label
distributions. Building on this foundation, an adversarial domain discriminator
is incorporated for the implicit domain alignment of complex multi-modal
distributions. Furthermore, we project node representations into a different
space, optimizing the mutual information between the projected features and
labels. Subsequently, the inconsistency of similarity structures is evaluated
to identify noisy samples with potential overfitting. Comprehensive experiments
on various benchmark datasets substantiate the outstanding superiority of the
proposed ALEX in different settings.Comment: Accepted by the ACM International Conference on Multimedia (MM) 202
3DSAM-adapter: Holistic Adaptation of SAM from 2D to 3D for Promptable Medical Image Segmentation
Despite that the segment anything model (SAM) achieved impressive results on
general-purpose semantic segmentation with strong generalization ability on
daily images, its demonstrated performance on medical image segmentation is
less precise and not stable, especially when dealing with tumor segmentation
tasks that involve objects of small sizes, irregular shapes, and low contrast.
Notably, the original SAM architecture is designed for 2D natural images,
therefore would not be able to extract the 3D spatial information from
volumetric medical data effectively. In this paper, we propose a novel
adaptation method for transferring SAM from 2D to 3D for promptable medical
image segmentation. Through a holistically designed scheme for architecture
modification, we transfer the SAM to support volumetric inputs while retaining
the majority of its pre-trained parameters for reuse. The fine-tuning process
is conducted in a parameter-efficient manner, wherein most of the pre-trained
parameters remain frozen, and only a few lightweight spatial adapters are
introduced and tuned. Regardless of the domain gap between natural and medical
data and the disparity in the spatial arrangement between 2D and 3D, the
transformer trained on natural images can effectively capture the spatial
patterns present in volumetric medical images with only lightweight
adaptations. We conduct experiments on four open-source tumor segmentation
datasets, and with a single click prompt, our model can outperform domain
state-of-the-art medical image segmentation models on 3 out of 4 tasks,
specifically by 8.25%, 29.87%, and 10.11% for kidney tumor, pancreas tumor,
colon cancer segmentation, and achieve similar performance for liver tumor
segmentation. We also compare our adaptation method with existing popular
adapters, and observed significant performance improvement on most datasets.Comment: 14 pages, 6 figures, 5 table
A Comprehensive Survey on Deep Graph Representation Learning
Graph representation learning aims to effectively encode high-dimensional
sparse graph-structured data into low-dimensional dense vectors, which is a
fundamental task that has been widely studied in a range of fields, including
machine learning and data mining. Classic graph embedding methods follow the
basic idea that the embedding vectors of interconnected nodes in the graph can
still maintain a relatively close distance, thereby preserving the structural
information between the nodes in the graph. However, this is sub-optimal due
to: (i) traditional methods have limited model capacity which limits the
learning performance; (ii) existing techniques typically rely on unsupervised
learning strategies and fail to couple with the latest learning paradigms;
(iii) representation learning and downstream tasks are dependent on each other
which should be jointly enhanced. With the remarkable success of deep learning,
deep graph representation learning has shown great potential and advantages
over shallow (traditional) methods, there exist a large number of deep graph
representation learning techniques have been proposed in the past decade,
especially graph neural networks. In this survey, we conduct a comprehensive
survey on current deep graph representation learning algorithms by proposing a
new taxonomy of existing state-of-the-art literature. Specifically, we
systematically summarize the essential components of graph representation
learning and categorize existing approaches by the ways of graph neural network
architectures and the most recent advanced learning paradigms. Moreover, this
survey also provides the practical and promising applications of deep graph
representation learning. Last but not least, we state new perspectives and
suggest challenging directions which deserve further investigations in the
future
Examining the generalizability of research findings from archival data
This initiative examined systematically the extent to which a large set of archival research findings generalizes across contexts. We repeated the key analyses for 29 original strategic management effects in the same context (direct reproduction) as well as in 52 novel time periods and geographies; 45% of the reproductions returned results matching the original reports together with 55% of tests in different spans of years and 40% of tests in novel geographies. Some original findings were associated with multiple new tests. Reproducibility was the best predictor of generalizability—for the findings that proved directly reproducible, 84% emerged in other available time periods and 57% emerged in other geographies. Overall, only limited empirical evidence emerged for context sensitivity. In a forecasting survey, independent scientists were able to anticipate which effects would find support in tests in new samples
Can Environmental Regulation Reduce Urban Haze Concentration from the Perspective of China’s Five Urban Agglomerations?
Based on the perspective of urban agglomerations, this paper explores the impact mechanism of environmental regulation on haze, and tries to find the most suitable environmental regulation intensity for haze control in urban agglomerations. This paper uses the fixed-effect model and panel threshold model to verify the effect of environmental regulations on haze concentration in 206 cities in China. A grouping test is also conducted to verify whether a regional heterogeneity arises due to different regional development levels for five urban agglomerations and non-five urban agglomerations, respectively. The results show that: (1) In the linear model, strengthening environmental regulation can reduce the haze concentration, but this effect is not significant. The effect of environmental regulation on haze control in the five major urban agglomerations is better than that in the non-five major urban agglomerations; (2) In the nonlinear model, the impact of environmental regulation on haze shows a “U” trend in the five major urban agglomerations and an inverted “U” trend in the non-five major urban agglomerations. Although the results are not significant, we can still conclude that the impact of environmental regulation on haze varies depending on the level of regional economic development. Therefore, the environmental regulation should be formulated according to local conditions; (3) In the threshold model, the impact of environmental regulation on the haze concentration in five major urban agglomerations has a threshold effect. In the five major urban agglomerations, although environmental regulation can effectively reduce haze concentration, the governance effect will weaken as the environmental regulation increases. This study plays a positive role in guiding local governments to adjust environmental regulation intensity according to local conditions and helping local environmental improvement
Generation of Large Polynuclear Rare Earth Metal-Containing Organic–Inorganic Polytungstoarsenate Aggregates
Eight
members of a new family of polyoxometalate (POM)-ligated
organic–inorganic rare earth metal compounds K<sub>11</sub>LiH<sub>21</sub>[RE<sub>3</sub>(H<sub>2</sub>O)<sub>7</sub>{RE<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>As<sub>2</sub>W<sub>19</sub>O<sub>68</sub>(WO<sub>2</sub>)<sub>2</sub>(C<sub>6</sub>O<sub>7</sub>H<sub>4</sub>)<sub>2</sub>}<sub>3</sub>]·<i>n</i>H<sub>2</sub>O (RE = Y (<b>1</b>), Tb (<b>2</b>), Dy (<b>3</b>), Ho (<b>4</b>), Er (<b>5</b>),
Tm (<b>6</b>), Yb (<b>7</b>), Lu (<b>8</b>); for
compounds <b>1</b>–<b>6</b> and <b>8</b>, <i>n</i> = 46; for compound <b>7</b>, <i>n</i> =
57; C<sub>6</sub>H<sub>8</sub>O<sub>7</sub> = citric acid) have been
synthesized through conventional aqueous solution by introducing organic
ligand citric acid into the arsenotungstates system, which were further
characterized by elemental analyses, IR and UV spectroscopy, thermogravimetric
analyses, and single-crystal X-ray diffraction. The polyoxoanions
[RE<sub>3</sub>(H<sub>2</sub>O)<sub>7</sub>{RE<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>As<sub>2</sub>W<sub>19</sub>O<sub>68</sub>(WO<sub>2</sub>)<sub>2</sub>(C<sub>6</sub>O<sub>7</sub>H<sub>4</sub>)<sub>2</sub>}<sub>3</sub>]<sup>33–</sup> in compounds <b>1</b>–<b>8</b> are composed of three {RE<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>As<sub>2</sub>W<sub>19</sub>O<sub>68</sub>{WO<sub>2</sub>(C<sub>6</sub>O<sub>7</sub>H<sub>4</sub>)}<sub>2</sub>} subunits linked by another three rare earth ions.
What’s more, the fluorescence properties of <b>2</b> and <b>3</b> have also been investigated. Electron paramagnetic resonance
(EPR) experiments further demonstrated the result of the interesting
photochromic property
Effect of Moxibustion on the Serum Levels of MMP-1, MMP-3, and VEGF in Patients with Rheumatoid Arthritis
Background. Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disease, which will eventually lead to joints deformity and functional damage. The aim of this research is to evaluate the effect of moxibustion on the serum indicators related to bone and cartilage metabolism, matrix metalloproteinase 1 (MMP-1), matrix metalloproteinase 3 (MMP-3), and vascular endothelial growth factor (VEGF) in patients with RA and to explore the mechanism of moxibustion in the treatment of RA. Methods. We recruited 70 RA patients who met the inclusion criteria, and they were randomly divided into two groups, a treatment group and a control group in equal ratio. The control group took methotrexate, folate, or leflunomide orally, while the treatment group received methotrexate, folate, or leflunomide orally and moxibustion at ST36 (Zusanli), BL23 (Shen shu), and Ashi points. We compared the clinical symptoms, RA serological disease markers and serum contents of interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), MMP-1, MMP-3, and VEGF of RA patients before and after treatment. Results. (1) The clinical symptoms and RA serological disease markers of the two groups improved after treatment (P 0.05, P > 0.05). Above all, the contents of IL-1β, TNF-α, MMP-1, MMP-3, and VEGF in the treatment group decreased more significantly than those in the control group (P < 0.05). Conclusion. The improvement effect of moxibustion on the clinical symptoms of RA patients may be related to influence on the contents of IL-1β, TNF-α, MMP-1, MMP-3, and VEGF, and moxibustion may play a potential role in bone protection
Wearable biosensors for human fatigue diagnosis: A review
Abstract Fatigue causes deleterious effects to physical and mental health of human being and may cause loss of lives. Therefore, the adverse effects of fatigue on individuals and the society are massive. With the ever‐increasing frequency of overtraining among modern military and sports personnel, timely, portable and accurate fatigue diagnosis is essential to avoid fatigue‐induced accidents. However, traditional detection methods require complex sample preparation and blood sampling processes, which cannot meet the timeliness and portability of fatigue diagnosis. With the development of flexible materials and biosensing technology, wearable biosensors have attracted increased attention to the researchers. Wearable biosensors collect biomarkers from noninvasive biofluids, such as sweat, saliva, and tears, followed by biosensing with the help of biosensing modules continuously and quantitatively. The detection signal can then be transmitted through wireless communication modules that constitute a method for real‐time understanding of abnormality. Recent developments of wearable biosensors are focused on miniaturized wearable electrochemistry and optical biosensors for metabolites detection, of which, few have exhibited satisfactory results in medical diagnosis. However, detection performance limits the wide‐range applicability of wearable fatigue diagnosis. In this article, the application of wearable biosensors in fatigue diagnosis has been discussed. In fact, exploration of the composition of different biofluids and their potential toward fatigue diagnosis have been discussed here for the very first time. Moreover, discussions regarding the current bottlenecks in wearable fatigue biosensors and the latest advancements in biochemical reaction and data communication modules have been incorporated herein. Finally, the main challenges and opportunities were discussed for wearable fatigue diagnosis in the future
Baicalin Attenuated PANX-1/P2X7 Axis, P2Y6, and NLRP3/Caspase-1 Signaling Pathways in Peritonitis Induced by <i>Glaesserella parasuis</i>
Glaesserella parasuis (G. parasuis) can cause peritonitis in piglets. However, the pathogenesis of peritonitis remains unclear. Baicalin has been shown to possess anti-inflammatory and anti-oxidant functions. The aim of this study was to investigate the role of the PANX-1/P2X7 axis and the P2Y6 signaling pathway in peritonitis induced by G. parasuis and the effect of baicain on the PANX-1/P2X7 axis and P2Y6 pathway activation triggered by G. parasuis. A G. parasuis serovar 5 isolate SH0165 strain was obtained from the lungs of commercially produced pigs which had the typical symptoms of Glässer’s disease, namely arthritis, fibrinous polyserositis, hemorrhagic pneumonia, and meningitis. Then, 35 piglets were randomly divided into five groups, each group containing seven piglets. The groups consisted of a negative control group, an infection group, a 25 mg/kg baicalin group, a 50 mg/kg baicalin group, and a 100 mg/kg baicalin group. The results showed that G. parasuis could promote PANX-1/P2X7 axis and P2Y6 activation; induce NLRP3/caspase-1, IL-1β and IL-18 expression; trigger PLC/PKC and MLCK/MLC signaling activation; attenuate the expression of tight junction proteins ZO-1, E-cadherin, Occludins, and claudin 1; and stimulate CD14, CD24, CD36, CD47, and CD91 expression in the peritoneum as measured via Western blot (p p G. parasuis as measured via Western blot. Our results deepen the understanding of the mechanism of peritonitis triggered by G. parasuis and provide some novel potential methods of controlling G. parasuis infection