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Intersection-union dual-stream cross-attention Lova-SwinUnet for skin cancer hair segmentation and image repair

Computers in Biology and Medicine 2024年 180卷 108931页

作者： Qin, Juanjuan Pei, Dong Guo, Qian Cai, Xingjuan Xie, Liping Zhang, Wensheng Shanxi Key Laboratory of Big Data Analysis and Parallel Computing Taiyuan University of Science and Technology Taiyuan China State Key Laboratory for Novel Software Technology at Nanjing University Nanjing University Nanjing China Beijing China

Skin cancer images have hair occlusion problems, which greatly affects the accuracy of diagnosis and classification. Current dermoscopic hair removal methods use segmentation networks to locate hairs, and then uses repair networks to perform image repair. However, it is difficult to segment hair and capture the overall structure between hairs because of the hair being thin, unclear, and similar in color to the entire image. When conducting image restoration tasks, the only available images are those obstructed by hair, and there is no corresponding ground truth (supervised data) of the same scene without hair obstruction. In addition, the texture information and structural information used in existing repair methods are often insufficient, which leads to poor results in skin cancer image repair. To address these challenges, we propose the intersection-union dual-stream cross-attention Lova-SwinUnet (IUDC-LS). Firstly, we propose the Lova-SwinUnet module, which embeds Lovasz loss function into Swin-Unet, enabling the network to better capture features of various scales, thus obtaining better hair mask segmentation results. Secondly, we design the intersection-union (IU) module, which takes the mask results obtained in the previous step for pairwise intersection or union, and then overlays the results on the skin cancer image without hair to generate the labeled training data. This turns the unsupervised image repair task into the supervised one. Finally, we propose the dual-stream cross-attention (DC) module, which makes texture information and structure information interact with each other, and then uses cross-attention to make the network pay attention to the more important texture information and structure information in the fusion process of texture information and structure information, so as to improve the effect of image repair. The experimental results show that the PSNR index and SSIM index of the proposed method are increased by 5.4875 and 0.0401 compared w

关键词： Image segmentation

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Micron-scale ultrathin two-dimension zirconia nanosheets towards enhancing anticorrosion performance of epoxy coatings

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Tungsten 2021年第4期3卷 459-469页

作者： Xin-Ding Lv Hao-Tong Li Xiao-Gang Dai Xiang-Nan Sun Hai-Yong Zhang Yan-Zhen Zheng Xia Tao Li-Hui Yang Navy Coatings Analysis and Test Center Beijing 102442China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Shandong Key Laboratory of Corrosion Science Institute of OceanologyChinese Academy of SciencesQingdao 266071China

Polymer nanocomposite coatings have attracted great interest in the anticorrosion fields due to their excellent *** are necessary to achieve high anticorrosion performance of the polymer ***,we report a wet-chemical template strategy to prepare large-size ZrO_(2)nanosheets,in which the Zr^(4+)ions are anchored on the surface of a graphene oxide template via electrostatic adsorption,followed by a thermal treatment process to remove *** force microscopy(AFM)and scanning electron microscopy(SEM)images show that the size and thickness of as-prepared ZrO_(2)nanosheets are more than 2μm and~4.5 nm,*** micron-scale ultrathin two-dimension(2D)ZrO_(2)nanosheets,for the first time,are utilized as the anticorrosive fillers in the epoxy coating to reduce the porosity,consequently promoting the gas and water barrier properties of the composite *** polymer coating containing 1.0 wt%ZrO_(2)nanosheets shows a high initial impedance(89.1 GΩ·cm^(2))that can protect the metal substrate from being corroded during long-term immersion(60 days),which is better than that of the reduced graphene oxide(rGO)-incorporated coating and the ZrO_(2)nanoparticles-incorporated *** work offers valuable insights into the design and preparation of novel and efficient 2D electric-inert nanofillers for anticorrosion coatings.

关键词： Zirconia Anticorrosion Nanosheet Epoxy coating

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The RNase III enzyme Dicer1 is essential for larval development in Bombyx mori

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Insect science 2023年第5期30卷 1309-1324页

作者： Dongbin Chen Xu Yang Dehong Yang Yujia Liu Yaohui Wang Xingyu Luo Linmeng Tang Meiyan Yi Yongping Huang Yanqun Liu Zulian Liu Department of Sericulture College of Bioscience and BiotechnologyShenyang Agricultural UniversityShenyangChina Key Laboratory of Insect Developmental and Evolutionary Biology Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghaiChina University of Chinese Academy of Sciences BeijingChina Guangzhou Key Laboratory of Insect Development Regulation and Application Research Institute of Insect Science and TechnologySchool of Life SciencesSouth China Normal UniversityGuangzhouChina

MicroRNAs(miRNAs)are important regulators of nearly all aspects of biological processes in *** the biogenesis of miRNAs,the RNase III enzyme Dicer processes double-strand precursor miRNAs into mature miRNAs and promotes the assembly of RNA-induced silencing complexes(RISCs).Dicer has been reported to participate in a wide range of physiological processes,including development and immunity,in some insect ***,the physiological roles of Dicer in lepidopterans remain poorly *** this study,we investigated the function of Bombyx mori *** first performed sequence alignment and found that the sequence of functional domains of Dicer1 are varied among Lepidoptera,Diptera,Coleoptera,Blattaria,and *** a binary clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein 9 genome editing approach,we showed that BmDicer1 mutants have arrested development from the 3rd instar into the 4th *** sequencing analysis indicated that the defects in BmDicer1 mutants are due to dysregulation of genes that encode proteins involved in metabolism,protein degradation,absorption,and renin–angiotensin *** using quantitative real-time polymerase chain reaction showed that mutation of BmDicer1 altered expression of miRNAs and their target ***,our study demonstrates the critical roles of BmDicer1 in miRNA biogenesis and larval development in silkworm.

关键词： Bombyx mori CRISPR/Cas9 Dicer1 larval development

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A dual-function schiff base ligand: Fluorescent probe and high sustainable adsorption via PVC immobilized for Cd(II) and Pb(II): Experiments, DFT calculations and cost analysis

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Chemical Engineering Journal 2025年 516卷

作者： Nabat, Karim Youssef Ayub, Ali Raza Mansy, Ahmed E. Zhang, Niu Du, Yunyun Zhong, Xue Zhang, Menglei Li, Hansheng Li, Hui Key Laboratory of Clusters Science of Ministry of Education School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing China Petrochemical Engineering Department Faculty of Engineering Pharos University in Alexandria Alexandria21544 Egypt Borg El-Arab New City Alexandria21934 Egypt Analysis & Testing Centre Beijing Institute of Technology Beijing102488 China

A novel facial Schiff base (LH) was used as a fluorescent sensor that turns on–off for cadmium and lead, respectively, with a high level of sensitivity with a detection limit of 2.67 × 10−7 M for Cd(II) and 1.75 × 10−7 M for Pb(II), followed by immobilization with polyvinyl chloride (PVC). The fabricated LH-PVC (PVCX) adsorbent was characterized using FTIR, SEM, XRD, BET, and TGA analysis, validating the incorporation and effective immobilization of LH onto PVC with a strong hydrogen bonding. The impact of PVC3 on the adsorption of Cd(II) and Pb(II) was assessed under various adsorption conditions, including solution pH, isotherm, kinetics, thermodynamics, adsorbent dosage, and the adsorption mechanism. The PVC3 adsorbent showed a significant binding affinity for Cd(II) and Pb(II) at pH 5 with a maximum adsorption capacity of 507.217 mg·g−1 and 409.325 mg·g−1, respectively, at 318 K. Kinetic studies revealed that the adsorption process followed pseudo-second-order kinetics, while adsorption isotherms were in agreement with the Langmuir isotherm model, suggesting monomolecular layer adsorption. The evaluation of thermodynamics indicates that the adsorption process is an endothermic spontaneous process. Moreover, a DFT study was conducted to further understand the responsive and adsorptive mechanism. The PVC3 adsorbent demonstrated exceptional reusability, maintaining its high adsorption effectiveness even after multiple cycles of adsorption and desorption. A cost-effective analysis was conducted, revealing a very low final reusability cost. This finding reveals that it might be utilized in water treatment, which provides a potential method to reduce heavy metal pollution and safeguard aquatic ecosystems. © 2025 Elsevier B.V.

关键词： Adsorption isotherms

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Comparative chloroplast genomes of Ulva prolifera and ***(Ulvophyceae)provide genetic resources for the development of interspecific markers

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Journal of Oceanology and Limnology 2022年第6期40卷 2372-2384页

作者： Wenzheng LIU Qianchun LIU Jin ZHAO Xiu WEI Peng JIANG CAS and Shandong Province Key Laboratory of Experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China College of Life Science Qingdao UniversityQingdao 266071China

The green seaweeds Ulva linza and *** are closely related *** usually co-occur widely and have important ecological significance as primary producers thriving in the intertidal *** the Yellow Sea,a genetically unique floating ecotype of *** even bloomed to cause serious green ***,there is still a lack of appropriate molecular markers to distinguish these two species,partially due to limited evaluations on the intraspecific variations in *** among dif ferent *** organelle genomes could provide rich genetic resources for phylogenetic analysis and development of genetic markers,in this study,the chloroplast genome from one attached population of *** was completely sequenced,and comparative genomic analyses were performed with other existing chloroplast genomes from *** and the floating ecotype of *** results showed that in spite of the high level of collinearity among three genomes,there were plenty of genetic variations especially within the non-coding regions,including introns and gene spacer regions.A strategy was proposed that only those signals of variation,which were identical between two ecotypes of *** but divergent between *** and ***,were selected to develop the interspecific markers for *** and *** candidate markers,psa B and pet B,were shown to be able to distinguish these two closely related species and were applicable to more attached populations of *** from a wide range of geographical *** addition to the interspecific marker,this study would also provide resources for the development of intraspecific markers for *** markers might contribute to the surveys for Ulva species composition and green tide monitoring especially in the Yellow Sea region.

关键词： chloroplast genome comparative genomics intraspecifi c variation Ulva linza Ulva prolifera

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Predicting the CME arrival time based on the recommendation algorithm

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Research in Astronomy and Astrophysics 2021年第8期21卷 59-74页

作者： Yu-Rong Shi Yan-Hong Chen Si-Qing Liu Zhu Liu Jing-Jing Wang Yan-Mei Cui Bingxian Luo Tian-Jiao Yuan Feng Zheng Zisiyu Wang Xin-Ran He Ming Li National Space Science Center Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Science and Technology on Environmental Space Situation Awareness Chinese Academy of SciencesBeijing 100190China Department of Computer Science and Engineering Southern University of Science and TechnologyShenzhen 518055China

CME is one of the important events in the sun-earth system as it can induce geomagnetic disturbance and an associated space environment *** is of special significance to predict whether CME will reach the Earth and when it will *** this paper,we firstly built a new multiple association list for 215 different events with 18 characteristics including CME features,eruption region coordinates and solar wind *** on the CME list,we designed a novel model based on the principle of the recommendation algorithm to predict the arrival time of *** to the two commonly used calculation methods in the recommendation system,cosine distance and Euclidean distance,a controlled trial was carried out *** feature has been found to have its own appropriate *** error analysis indicates the result using the Euclidean distance similarity is much better than that using cosine distance *** mean absolute error and root mean square error of test data in the Euclidean distance are 11.78 and 13.77 h,close to the average level of other CME models issued in the CME scoreboard,which verifies the effectiveness of the recommendation *** work gives a new endeavor using the recommendation algorithm,and is expected to induce other applications in space weather prediction.

关键词： Sun:coronal mass ejections(CMEs) method:recommendation algorithm

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The FAST Galactic Plane Pulsar Snapshot *** of 76 Galactic Rotating Radio Transients and the Enigma of RRATs

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Research in Astronomy and Astrophysics 2023年第10期23卷 1-70页

作者： D.J.Zhou J.L.Han Jun Xu Chen Wang P.F.Wang Tao Wang Wei-Cong Jing Xue Chen Yi Yan Wei-QiSu Heng-Qian Gan Peng Jiang Jing-Hai Sun Hong-Guang Wang Na Wang Shuang-Qiang Wang Ren-Xin Xu Xiao-Peng You National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy University of Chinese Academy of SciencesBeijing 100049China Department of Astronomy School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China National Astronomical Data Center Great Bay AreaGuangzhou 510006China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China Department of Astronomy Peking UniversityBeijing 100871China School of Physical Science and Technology Southwest UniversityChongqing 400715China

We have carried out the Galactic Plane Pulsar Snapshot(GPPS)survey by using the Five-hundred-meter Aperture Spherical radio Telescope(FAST),the most sensitive systematic pulsar survey in the Galactic *** addition to more than 500 pulsars already discovered through normal periodical search,we report here the discovery of 76 new transient radio sources with sporadic strong pulses,detected by using the newly developed module for a sensitive single-pulse *** small DM values suggest that they all are Galactic rotating radio transients(RRATs).They show different properties in the follow-up *** radio pulses have been detected from 26 transient radio sources but no periods can be found due to a limited small number of pulses from all FAST *** followup observations show that 16 transient sources are newly identified as being the prototypes of RRATs with a period already determined from more detected sporadic pulses,and 10 sources are extremely nulling pulsars,and 24 sources are weak pulsars with sparse strong *** the other hand,48 previously known RRATs have been detected by the FAST,either during verification observations for the GPPS survey or through targeted observations of applied normal FAST *** for one RRAT with four pulses detected in a session of 5-minute observation and four RRATs with only one pulse detected in a session,sensitive FAST observations reveal that 43 RRATs are just generally weak pulsars with sporadic strong pulses or simply very nulling pulsars,so that the previously known RRATs always have an extreme emission state together with a normal hardly detectable weak emission *** is echoed by the two normal pulsars J1938+2213 and J1946+1449 with occasional brightening *** strong pulses of RRATs are very outstanding in the energy distribution,their polarization angle variations follow the polarization angle curve of the averaged normal pulse profile,suggesting that the predominant s

关键词： (stars:)pulsars:general surveys methods:data analysis

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Whole-genome methylation analysis reveals epigenetic variation between wild-type and nontransgenic cloned,ASMT transgenic cloned dairy goats generated by the somatic cell nuclear transfer

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Journal of Animal science and Biotechnology 2023年第1期14卷 98-113页

作者： Hao Wu Wendi Zhou Haijun Liu Xudai Cui Wenkui Ma Haixin Wu Guangdong Li Likai Wang Jinlong Zhang Xiaosheng Zhang Pengyun Ji Zhengxing Lian Guoshi Liu National Engineering Laboratory for Animal Breeding Key Laboratory of Animal Genetics and Breeding of the Ministry of AgriculturalBeijing Key Laboratory for Animal Genetic ImprovementCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China. Sany Institute of China Agricultural University Sanya 572025China. Institute of Animal Husbandry and Veterinary Academy of Agricultural Sciences of TianjinTianjin 300192China. Qingdao Senmiao Industrial Co. Ltd.Qingdao 266101China.

Background:SCNT(somatic cell nuclear transfer)is of great significance to biological research and also to the livestock ***,the survival rate of the SCNT cloned animals is relatively low compared to other transgenic *** indicates the potential epigenetic variations between *** methylation is a key marker of mammalian epigenetics and its alterations will lead to phenotypic *** this study,ASMT(acetylserotonin-Omethyltransferase)ovarian overexpression transgenic goat was produced by using *** investigate whether there are epigenetic differences between cloned and WT(wild type)goats,WGBS(whole-genome bisulfite sequencing)was used to measure the whole-genome methylation of these ***:It is observed that the different m Cp G sites are mainly present in the intergenic and intronic regions between cloned and WT animals,and their CG-type methylation sites are strongly ***(differentially methylated region)lengths are located around 1000 bp,mainly distributed in the exonic,intergenic and intronic functional domains.A total of 56 and 36 DMGs(differentially methylated genes)were identified by GO and KEGG databases,*** annotation showed that DMGs were enriched in biological-process,cellularcomponent,molecular-function and other signaling pathways.A total of 10 identical genes related to growth and development were identified in GO and KEGG ***:The differences in methylation genes among the tested animals have been identified.A total of 10 DMGs associated with growth and development were identified between cloned and WT *** results indicate that the differential patterns of DNA methylation between the cloned and WT goats are probably caused by the *** novel observations will help us to further identify the unveiled mechanisms of somatic cell cloning technology,particularly in goats.

关键词： Acetylserotonin-O-methyltransferase Dairy goat DNA methylation Gene editing Somatic cell nuclear transfer

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Growth Behavior of Anisotropic Monometallic Mofs Derivatives with the High Absorbing and Thermal Properties

SSRN

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SSRN 2024年

作者： Si, Wei Liao, Qingwei Li, Yinghao Zhao, Hanqing Novikov, Alexander S. Qin, Lei Key Laboratory of Sensors Beijing Information Science and Technology University Beijing100192 China Key Laboratory of Modern Measurement & Control Technology Ministry of Education Beijing Information Science & Technology University Beijing100192 China Key Laboratory of Photoelectric Testing Technology Beijing Information Science & Technology University Beijing100192 China Saint Petersburg State University Universitetskaya Nab. 7/9 Saint Petersburg Russia ITMO University Russia

The growth behavior and morphological characteristics of metal-organic frameworks (MOFs) should be considered as important factors in understanding their structure. Therefore, MOFs with atypical shapes, heterogeneous structures or abnormal properties that grow anisotropic can serve as components and templates for further directed assembly or conversion into MOF derivatives with excellent performance in electromagnetic wave absorption. Cobalt (Co) and nickel (Ni) metals have good magnetic properties and are common materials for the preparation of monometallic MOF derivatives. In this study, a variety of MOF materials with anisotropic properties, such as rod-like, flower-like, and braided, were prepared by adjusting the molar ratio of Co and Ni solvent to the organic ligand. Due to the rich inter-facial polarization and strong magnetic coupling network of the magnetic composites, Ni-MOF-b with braided shape was prepared for the first time when the molar ratio of nickel nitrate to linker was 1:1.2. The Ni-C-b was obtained after pyrolysis of Ni-MOF-b, the minimum reflection loss of Ni-C-b was –50.7 dB at 4.0 mm. In addition, the thermal conductivity of the film prepared with Ni-C-b as filler is 2.2 W/mK. The film with integrated good heat dissipation and wave absorbing properties provides a research idea for the design of multifunctional integrated film. © 2024, The Authors. All rights reserved.

关键词： Anisotropy

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The Stability analysis of Particle Swarm Optimization-Grey Wolf Optimization Algorithm

The Stability Analysis of Particle Swarm Optimization-Grey W...

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2023 International Conference on Computer, Artificial Intelligence, and Control Engineering, CAICE 2023

作者： Han, Chongyang Wang, Ranjun Cheng, Tianji Liu, Zhiwen Wei, Shengjie University of Chinese Academy of Sciences Beijing100049 China Institute of Optics and Electronics Chinese Academy of Sciences Chengdu610209 China Key Laboratory of Science and Technology on Space Optoelectronic Precision Measurement Chinese Academy of Sciences Chengdu610209 China

ISBN: (纸本)9781510665040

In order to overcome the problem that particles fall into local optimum in the iterative process of particle swarm optimization (PSO) algorithm, the gray wolf optimization (GWO) is added to particle swarm optimization and form particle swarm optimization-gray wolf optimization (PSO-GWO) algorithm. Aiming at the instability of the algorithm in the iterative process, two methods for judging the stability of the algorithm are proposed, namely, the asymptotic stability analysis method of the algorithm model perturbation system and the input-to-state stability (ISS) analysis method. First, the PSO-GWO algorithm is transformed into a discrete linear time-varying (DLTV) system model, and two stability analysis methods are used to judge the stability of the model. Through simulation experiments on 9 benchmark functions under 5 different sets of algorithm parameters, that is, the stability of PSO-GWO algorithm in the iterative process is analyzed. The experimental results verify the effectiveness of the stability theory of the algorithm. © 2023 SPIE.

关键词： Iterative methods

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