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Rapid assessment of seismic landslide zones

Haiqiang Guo, Lingkan Yao, Shaowei Sun
2015 Journal of Modern Transportation  
In the feasibility stage of the transport route selection, large-scale geological investigations are advised before the route is determined. Therefore, rapid assessment of seismic landslide zones can be completed by the second development of the ArcGIS program. A large amount of geological information can be obtained by this method which is based on existing remote sensing image data. The integrated data can then be used to guide route location selection. This method assesses the angle between
more » ... he main axis of the slope and the axis of the route and produces a zoning map that identifies slopes that threaten the route by combining with other characteristics including the climate in the study area, and the lithology and seismic structure of the near-field region. A hazard-zone map showing the degree of earthquake-induced landslide can be quickly generated by the comprehensive index method. The seismic landslide zone map was verified by comparison with the findings of a geological engineering survey conducted in the study area.
doi:10.1007/s40534-015-0084-0 fatcat:qdimrjrqpreozirm4xjmpvtahe

Deep Learning for Detection of Object-Based Forgery in Advanced Video

Ye Yao, Yunqing Shi, Shaowei Weng, Bo Guan
2017 Symmetry  
Passive video forensics has drawn much attention in recent years. However, research on detection of object-based forgery, especially for forged video encoded with advanced codec frameworks, is still a great challenge. In this paper, we propose a deep learning-based approach to detect object-based forgery in the advanced video. The presented deep learning approach utilizes a convolutional neural network (CNN) to automatically extract high-dimension features from the input image patches.
more » ... from the traditional CNN models used in computer vision domain, we let video frames go through three preprocessing layers before being fed into our CNN model. They include a frame absolute difference layer to cut down temporal redundancy between video frames, a max pooling layer to reduce computational complexity of image convolution, and a high-pass filter layer to enhance the residual signal left by video forgery. In addition, an asymmetric data augmentation strategy has been established to get a similar number of positive and negative image patches before the training. The experiments have demonstrated that the proposed CNN-based model with the preprocessing layers has achieved excellent results.
doi:10.3390/sym10010003 fatcat:kfcnc56lwrez3musnjbn6ogpai

Adaptive Admittance Control for an Ankle Exoskeleton Using an EMG-Driven Musculoskeletal Model

Shaowei Yao, Yu Zhuang, Zhijun Li, Rong Song
2018 Frontiers in Neurorobotics  
Copyright © 2018 Yao, Zhuang, Li and Song. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).  ... 
doi:10.3389/fnbot.2018.00016 pmid:29692719 pmcid:PMC5902778 fatcat:fqnekfdztng5fhqqiccrkialai

Reversible watermarking based on PMO of triplets

Shaowei Weng, Yao Zhao, Jeng-Shyang Pan, Rongrong Ni
2008 2008 15th IEEE International Conference on Image Processing  
A reversible watermarking algorithm based on piecewise modi cation operation(PMO) of triplets is proposed in this paper. PMO is designed to embed a bit into any two pixels while remaining the intensity sum of pixels unchanged. Two bits are embedded into a triplet by repeatedly using PMO on every two neighboring pixels. Another advantage of using PMO is that the capacity consumed by the additional information can be largely decreased. As a result, the embedding capacity is considerably
more » ... A series of experiments is conducted to verify effectiveness and advantages of the proposed approach.
doi:10.1109/icip.2008.4711789 dblp:conf/icip/WengZPN08 fatcat:ttnonahjjfe2zmnqskhtp4f3ki

Reversible Watermarking Based on Invariability and Adjustment on Pixel Pairs

Shaowei Weng, Yao Zhao, Jeng-Shyang Pan, Rongrong Ni
2008 IEEE Signal Processing Letters  
A novel reversible data hiding scheme based on invariability of the sum of pixel pairs and pairwise difference adjustment (PDA) is presented in this letter. For each pixel pair, if a certain value is added to one pixel while the same value is subtracted from the other, then the sum of these two pixels will remain unchanged. How to properly select this value is the key issue for the balance between reversibility and distortion. In this letter, half the difference of a pixel pair plus 1-bit
more » ... ark has been elaborately selected to satisfy this purpose. In addition, PDA is proposed to significantly reduce the capacity consumed by overhead information. A series of experiments is conducted to verify the effectiveness and advantages of the proposed approach. Index Terms-Invariability of the sum of pixel pairs, pairwise difference adjustment (PDA), reversible watermarking.
doi:10.1109/lsp.2008.2001984 fatcat:tr4xej6v5zfb5gcxkzdacsomqe

Better AMR-To-Text Generation with Graph Structure Reconstruction

Tianming Wang, Xiaojun Wan, Shaowei Yao
2020 Proceedings of the Twenty-Ninth International Joint Conference on Artificial Intelligence  
AMR-to-text generation is a challenging task of generating texts from graph-based semantic representations. Recent studies formalize this task a graph-to-sequence learning problem and use various graph neural networks to model graph structure. In this paper, we propose a novel approach that generates texts from AMR graphs while reconstructing the input graph structures. Our model employs graph attention mechanism to aggregate information for encoding the inputs. Moreover, better node
more » ... ions are learned by optimizing two simple but effective auxiliary reconstruction objectives: link prediction objective which requires predicting the semantic relationship between nodes, and distance prediction objective which requires predicting the distance between nodes. Experimental results on two benchmark datasets show that our proposed model improves considerably over strong baselines and achieves new state-of-the-art.
doi:10.24963/ijcai.2020/538 dblp:conf/ijcai/SongT020 fatcat:z6eixtrqojdtxcx4b42jenlxsi

A Novel Reversible Watermarking Based on an Integer Transform

Shaowei Weng, Yao Zhao, Jeng-Shyang Pan, Rongrong Ni
2007 2007 IEEE International Conference on Image Processing  
A novel reversible data hiding scheme based on an integer transform is presented in this paper. The invertible integer transform exploits the correlations among four pixels in a quad. Data embedding is carried out by expanding the differences between one pixel and each of its three neighboring pixels. However, the high hiding capacity can not be achieved only by difference expansion, so the companding technique is introduced into the embedding process so as to further increase hiding capacity.
more » ... series of experiments are conducted to verify the feasibility and effectiveness of the proposed approach.
doi:10.1109/icip.2007.4379291 dblp:conf/icip/WengZPN07 fatcat:mia6jpsdireflmwxrokkffa3aa

Constrained maximum weighted bipartite matching: a novel approach to radio broadcast scheduling

Shaojiang Wang, Tianyong Wu, Yuan Yao, Dongbo Bu, Shaowei Cai
2019 Science China Information Sciences  
Keywords radio broadcast scheduling, branch-and-bound algorithm, constrained maximum weighted bipartite matching, Kuhn-Munkres algorithm, strategy combinations Citation Wang S J, Wu T Y, Yao Y, et al.  ... 
doi:10.1007/s11432-017-9324-0 fatcat:dxkbvqmw3zc43niqps4hijx54q

Effects of Sodium Hexametaphosphate Addition on the Dispersion and Hydration of Pure Calcium Aluminate Cement

Benjun Cheng, Can Yao, Jian Xiong, Xueyin Liu, Haijun Zhang, Shaowei Zhang
2020 Materials  
The effects of sodium hexametaphosphate (SHMP) addition on the dispersion and hydration of calcium aluminate cement were investigated, and the relevant mechanisms discussed. The content of SHMP and the adsorption capacity of SHMP on the surface of cement particles were estimated using plasma adsorption spectroscopy and the residual concentration method. The rheological behavior of hydrate, ζ-potential value of cement particles, phase transformation and the microstructure of the samples were
more » ... rmined by coaxial cylinder rheometer, zeta probe, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results indicate that SHMP readily reacted with Ca2+, forming complexes [Ca2(PO3)6]2− ions which were subsequently adsorbed onto the surfaces of cement particles. When the content of SHMP was 0.05%, the adsorption ratio reached 99%. However, it decreased to 89% upon further increasing the addition of SHMP to 0.4%. The complexes [Ca2(PO3)6]2− adsorbed onto the surfaces of cement particles inhibited the concentration of Ca2+ and changed ζ-potential, resulting in enhanced electrostatic repulsive force between the cement particles and reduced viscosity of cement-water slurry. The experimental results indicate that the complexes [Ca2(PO3)6]2− covering the surfaces of cement particles led to a delayed hydration reaction, i.e., they extended the hydration time of the cement particles, and that the optimal addition of SHMP was found to be about 0.2%.
doi:10.3390/ma13225229 pmid:33228038 fatcat:p66mgbdx3fh7lcju7wu3qkbbly

Difficult colonoscopy score identifies the difficult patients undergoing unsedated colonoscopy

Hui Jia, Limei Wang, Hui Luo, Shaowei Yao, Xiangping Wang, Linhui Zhang, Rui Huang, Zhiguo Liu, Xiaoyu Kang, Yanglin Pan, Xuegang Guo
2015 BMC Gastroenterology  
Many factors have been found to affect the difficulty of colonoscope insertion, such as age, gender, body mass index (BMI), history of abdominal surgery and operator etc. However, a scoring system may be more useful to predict the difficulty during colonoscopy. Methods: The individual and procedure-related data of 616 patients undergoing colonoscopy were prospectively collected from December 2013 through February 2014 in Xijing Hospital of Digestive Diseases. Cox regression analysis was used to
more » ... identify high-risk factors associated with difficulty of colonoscopy. A predicting model with the difficult colonoscopy score (DCS) was developed. Results: Total cecum intubation rate was 98.9% (609/616). Advanced age, lower BMI, inexperienced operator and fair or poor sleep quality were identified as independent factors of prolonged insertion time (all p < 0.05), which were used to develop the DCS. Based on the score, patients could be divided into high-risk and low-risk groups with distinct incomplete rates within 10 min (42.0% vs. 16.5%, p < 0.001). Compared with those with DCS ≤ 1, patients with DCS > 1 had increased insertion time (10.6 ± 0.7 min vs. 6.9 ± 0.2 min, p < 0.001) and pain score (1.9 ± 1.5 vs. 1.4 ± 1.4, p = 0.002). More abdominal compression (36.9% vs. 16.8%, p < 0.001) and position change (51.4% vs. 22.6%, p < 0.001) were needed in this group of patients. Conclusion: Patients with DCS > 1 had longer insertion time, higher pain score and needed more abdominal compression and position changes. DCS was useful for predicting the difficulty of colonoscope intubation. (ClinicalTrials.gov NCT02105025
doi:10.1186/s12876-015-0273-7 pmid:25886845 pmcid:PMC4397830 fatcat:6uc2tngpdfgwpddmxn5i64srre

Performance Test and Stability Analysis of Jute Ecological Bag on Subgrade Slope

Wei Shaowei, Cai Degou, Lv Song, Yao Jianping, L. Zhang, S. Defilla, W. Chu
2021 E3S Web of Conferences  
Ecological bags have been gradually adopted for ecological protection on the subgrade slope because of their good soil fixation effect, strong water retention performance, fast construction and other advantages. Ecological bags made of natural jute have obvious attributes in environmental protection and economic efficiency. In this study, the tensile and the tearing strength of the common-used jute cloth have been tested. The result shows that the strength meet the requirements of the
more » ... Compared with current frequently-used ecological bag made of non-woven cloth, the jute ecological bag has large apertures, which is suitable for the growth of dicotyledon plants. Moreover, its high friction coefficient with the soil is beneficial to the structure stability on the slope. On the other hand, a stability evaluation method has been established for the jute ecological bags on the subgrade slope under natural and heavy rainfall conditions. Then the steel wire mesh fixed by the anchor rods is used to enhance the stability of the jute ecological bags, which constitute the ecological protection system for the subgrade slope. Also, the stability of the protection system is analyzed and calculated.
doi:10.1051/e3sconf/202123301133 fatcat:jgt3dc4l4faank2lb4ombq7fdi

Lipopolysaccharide exposure induces oxidative damage in Caenorhabditis elegans: protective effects of carnosine

Jing Ma, Xiaoyuan Xu, Ranran Wang, Haijing Yan, Huijuan Yao, Hongmei Zhang, Shaowei Jiang, Ajing Xu
2020 BMC Pharmacology and Toxicology  
Background The present study was designed to investigate the protective effects and mechanisms of carnosine on lipopolysaccharide (LPS)-induced injury in Caenorhabditis elegans. Methods C. elegans individuals were stimulated for 24 h with LPS (100 μg/mL), with or without carnosine (0.1, 1, 10 mM). The survival rates and behaviors were determined. The activities of superoxide dismutase (SOD), glutathione reductase (GR), and catalase (CAT) and levels of malondialdehyde (MDA) and glutathione (GSH)
more » ... were determined using the respective kits. Reverse transcription polymerase chain reaction (RT-PCR) was performed to validate the differential expression of sod-1, sod-2, sod-3, daf-16, ced-3, ced-9, sek-1, and pmk-1. Western blotting was used to determine the levels of SEK1, p38 mitogen-activated protein kinase (MAPK), cleaved caspase3, and Bcl-2. C. elegans sek-1 (km2) mutants and pmk-1 (km25) mutants were used to elucidate the role of the p38 MAPK signaling pathway. Results Carnosine improved the survival of LPS-treated C. elegans and rescued behavioral phenotypes. It also restrained oxidative stress by decreasing MDA levels and increasing SOD, GR, CAT, and GSH levels. RT-PCR results showed that carnosine treatment of wild-type C. elegans up-regulated the mRNA expression of the antioxidant-related genes sod-1, sod-2, sod-3, and daf-16. The expression of the anti-apoptosis-related gene ced-9 and apoptosis-related gene ced-3 was reversed by carnosine. In addition, carnosine treatment significantly decreased cleaved caspase3 levels and increased Bcl-2 levels in LPS-treated C. elegans. Apoptosis in the loss-of-function strains of the p38 MAPK signaling pathway was suppressed under LPS stress; however, the apoptotic effects of LPS were blocked in the sek-1 and pmk-1 mutants. The expression levels of sek-1 and pmk-1 mRNAs were up-regulated by LPS and reversed by carnosine. Finally, the expression of p-p38MAPK and SEK1 was significantly increased by LPS, which was reversed by carnosine. Conclusion Carnosine treatment protected against LPS injury by decreasing oxidative stress and inhibiting apoptosis through the p38 MAPK pathway.
doi:10.1186/s40360-020-00455-w pmid:33272314 fatcat:zoqxsfzaqbfubhgiiv2otgv4my

Graphical Evolutionary Game Model of Virus-Based Intrusion to Power System for Long-term Cyber-Security Risk Evaluation

Boda Li, Ying Chen, Shaowei Huang, Rui Yao, Yue Xia, Shengwei Mei
2019 IEEE Access  
RUI YAO (S'12-M'17) received the B.S. (Hons.) and Ph.D. degrees in electrical engineering from Tsinghua University, Beijing, China, in 2011 and 2016, respectively.  ...  SHAOWEI HUANG (M'11) received the B.S. and Ph.D. degrees from the Department of Electrical Engineering, Tsinghua University, Beijing, China, in July 2006 and June 2011, respectively.  ... 
doi:10.1109/access.2019.2958856 fatcat:y5hmfvaewjhxdngc6asiaa7dca

Histone deacetylases 1 and 2 regulate the transcriptional programs of nephron progenitors and renal vesicles

Hongbing Liu, Shaowei Chen, Xiao Yao, Yuwen Li, Chao-Hui Chen, Jiao Liu, Zubaida Saifudeen, Samir S. El-Dahr
2018 Development  
Nephron progenitor cells (NPCs) are Six2-positive metanephric mesenchyme cells, which undergo self-renewal and differentiation to give rise to nephrons until the end of nephrogenesis. Histone deacetylases (HDACs) are a group of epigenetic regulators that control cell fate, but their role in balancing NPC renewal and differentiation is unknown. Here, we report that NPC-specific deletion of Hdac1 and Hdac2 genes in mice results in early postnatal lethality owing to renal hypodysplasia and loss of
more » ... NPCs. HDAC1/2 interact with the NPC renewal regulators Six2, Osr1 and Sall1, and are co-bound along with Six2 on the Six2 enhancer. Although the mutant NPCs differentiate into renal vesicles (RVs), Hdac1/2 mutant kidneys lack nascent nephrons or mature glomeruli, a phenocopy of Lhx1 mutants. Transcriptional profiling and network analysis identified disrupted expression of Lhx1 and its downstream genes, Dll1 and Hnf1a/4a, as key mediators of the renal phenotype. Finally, although HDAC1/2-deficient NPCs and RVs overexpress hyperacetylated p53, Trp53 deletion failed to rescue the renal dysgenesis. We conclude that the epigenetic regulators HDAC1 and HDAC2 control nephrogenesis via interactions with the transcriptional programs of nephron progenitors and renal vesicles.
doi:10.1242/dev.153619 pmid:29712641 fatcat:gf3zmpaxfraw5mmgheu3cm2jpi

Prevalence and influencing risk factors of eczema among preschool children in Urumqi city: a cross-sectional survey

Haonan Shi, Guangsheng Wan, Tingting Wang, Jia Zhu, Lan Jiang, Shaowei Ma, Jian Yao, Zhe Yin, Murizhati Maimaiti, Huijuan Dong
2021 BMC Pediatrics  
Background Eczema is a chronic inflammatory disease associated with impaired quality of life. We identified indoor environmental risk factors, to provide strong evidence for the prevention and control of eczema in preschool children. Methods Using a cross-sectional study with stratified random cluster sampling, we conducted a self-administered questionnaire survey among 8153 parents of children aged 2–8 years in 60 kindergartens in six districts of Urumqi city during August 2019. Results Among
more » ... 153 preschool children, 12.0% of the children have been diagnosed with eczema. Multivariate logistic regression analysis showed that caesarean section (odds ratio [OR] = 1.18, 95% confidence interval [CI]: 1.03–1.36), being an only child (OR = 1.36, 95% CI: 1.18–1.57), presence of mould or moisture in the mother's home before pregnancy (OR = 1.53, 95% CI: 1.17–2.00), presence of flies or mosquitoes in the dwelling currently (OR = 1.31, 95% CI: 1.10–1.55), pets kept in the child's home currently (OR = 1.23, 95% CI: 1.01–1.51), presence of pets during child's first year (OR = 1.45, 95% CI: 1.14–1.85), and family history of eczema (OR = 3.53, 95% CI: 2.98–4.19) are the risk factors for the development of eczema, whereas ethnicity other than the Han Chinese (OR = 0.77, 95% CI: 0.61–0.96) is a protective factor for eczema. Conclusion Preschool children in Urumqi are at a high risk of eczema, particularly those of the Han Chinese ethnicity. Parents should be attentive to the indoor living environment of children and take actions to reduce indoor humidity, pest control and elimination, and avoid raising pets to reduce the risk of development of eczema in children.
doi:10.1186/s12887-021-02819-5 pmid:34399722 pmcid:PMC8365957 fatcat:zl62dzb6hbhtvkcqm5vao3vybe
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