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Understanding the Mechanism for the In-Plane Yielding Anisotropy of a Hot-Rolled Zirconium Plate

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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 1066-1076页

作者： Guodong Song Conghui Zhang Yunchang xin Nobuhiro Tsuji xinde Huang bo Guan Xiaomei He School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055China Key Laboratory for Light-Weight Materials Nanjing Tech UniversityNanjing210009China Department of Materials Science and Engineering Kyoto UniversityYoshida-honmachiSakyo-kuKyoto606-8501Japan Institute of Applied Physics Jiangxi Academy of ScienceNanchang330029China

Previously,the in-plane mechanical anisotropy of Zr hot-rolled plates is ascribed mainly to the different activities of the deformation modes activated when loading along different *** this work,a quantitative study on the deformation behavior of a pure Zr hot-rolled plate under tension along the rolling direction(RD)and transverse direction(TD)reveals that both the activities of deformation modes and the anisotropy of grain boundary strengthening account for a tensile yield strength anisotropy along the TD and *** plasticity simulations using viso-plastic self-consistent model show that prismatic slip is the predominant deformation mode for tension along the RD(RD-tension),while prismatic slip and basal slip are co-dominant deformation modes under tension along the TD(TD-tension).A low fraction of■under TD-tension,while hardly activated under *** activation of basal slip with a much higher critical resolve shear stress under TD-tension contributes to a higher yield strength along the TD than along the *** grain boundary strengthening effect under tension along the TD and RD were compared by calculating the activation stress difference(△Stress)and the geometric compatibility factor(m′)between neighboring *** results indicate a higher grain boundary strengthening for TD-tension than that for RD-tension,which will lead to a higher yield strength along the *** is,the anisotropy of grain boundary strengthening between TD-tension and RD-tension also plays an important role in the in-plane anisotropy along the RD and ***,the reasons for why there is a grain-boundary-strengthening anisotropy along the TD and RD were discussed.

关键词： Zirconium Strengthening Grain boundary Orientation

Understanding inter-term fossil energy consumption pathways in China based on sustainable development goals

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Geoscience Frontiers 2024年第3期15卷 272-283页

作者： Xiaoxiao zhou Fangyuan Xie Hui Li Chenbin Zheng xin Zhao School of Finance Anhui University of Finance and EconomicsBengbu 233030China School of Economics Shandong University of Finance and EconomicsJinan 250002China School of Economics Fujian Normal UniversityFuzhou 350117China School of Statistics and Applied Mathematics Anhui University of Finance and EconomicsBengbu 233030China

Sustainable development goals(SDGs)and fossil energy are the core elements of almost all major challenges and opportunities for achieving social ***,energy sustainability has become one of the pivotal drivers of China’s *** study constructed a comprehensive evaluation index system for the provincial-level sustainable development of fossil energy in China covering three major dimensions(socio-economic,resource,and environmental).Moreover,a set of criteria for measuring the SDGs of fossil energy at the national level in China was *** on the provincial panel data collected from 30 provinces from 2010 through 2019,a spatial econometric model was applied to empirically evaluate the effects of SDGs on fossil energy *** results showed that the SDGs not only promote the reduction of fossil energy consumption with substantial negative spatial spillover effects,but also revealed differences between northern and southern *** promote the early achievement of sustainable fossil energy development in China,the transformation and upgradation of fossil energy systems should be conducted early and inter-regional cooperation should be strengthened according to local conditions to jointly achieve the SDGs.

关键词： Sustainable development goals Fossil energy consumption Spatial Durbin model Spillover effects

A generative adversarial network-based unified model integrating bias correction and downscaling for global SST

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Atmospheric and Oceanic Science Letters 2024年第1期17卷 45-52页

作者： Shijin Yuan xin Feng Bin Mu bo Qin xin Wang Yuxuan Chen School of Software Engineering Tongji UniversityShanghaiChina

本文提出了一种基于生成对抗网络的全球海表面温度(sea surface temperature,SST)偏差订正及降尺度整合模型.该模型的生成器使用偏差订正模块将数值模式预测结果进行校正,再用可复用的共享降尺度模块将订正后的数据分辨率逐次提高.该模... 详细信息

本文提出了一种基于生成对抗网络的全球海表面温度(sea surface temperature,SST)偏差订正及降尺度整合模型.该模型的生成器使用偏差订正模块将数值模式预测结果进行校正,再用可复用的共享降尺度模块将订正后的数据分辨率逐次提高.该模型的判别器可鉴别偏差订正及降尺度结果的质量,以此为标准进行对抗训练。同时,在对抗损失函数中含有物理引导的动力学惩罚项以提高模型的性能.本研究基于分辨率为1°的GFDL SPEAR模式的SST预测结果,选择遥感系统(Remote Sensing System)的观测资料作为真值,面向月尺度ENSO与IOD事件以及天尺度海洋热浪事件开展了验证试验:模型在将分辨率提高到0.0625°×0.0625°的同时将预测误差减少约90.3%,突破了观测数据分辨率的限制,且与观测结果的结构相似性高达96.46%.

关键词：偏差订正降尺度海表面温度生成对抗网络物理引导的神经网络

Mechanical properties and interfacial characteristics of 6061 Al alloy plates fabricated by hot-roll bonding

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1890-1899页

作者： Zongan Luo xin Zhang Zhaosong Liu Hongyu zhou Mingkun Wang Guangming Xie State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

This work aims to investigate the mechanical properties and interfacial characteristics of 6061 Al alloy plates fabricated by hotroll bonding(HRB)based on friction stir *** results showed that ultimate tensile strength and total elongation of the hot-rolled and aged joints increased with the packaging vacuum,and the tensile specimens fractured at the matrix after exceeding 1 ***-equilibrium grain boundaries were formed at the hot-rolled interface,and a large amount of Mg_(2)Si particles were linearly precipitated along the interfacial grain boundaries(IGBs).During subsequent heat treatment,Mg_(2)Si particles dissolved back into the matrix,and Al_(2)O_(3) film remaining at the interface eventually evolved into *** addition,the local IGBs underwent staged elimination during HRB,which facilitated the interface healing due to the fusion of grains at the *** process was achieved by the dissociation,emission,and annihilation of dislocations on the IGBs.

关键词： 6061 Al alloy hot-roll bonding vacuum mechanical properties interfacial grain boundaries

Silvestrol alleviates glioblastoma progression through ERK pathway modulation and MANBA and NRG-1 expression

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BIOCELL 2024年第7期48卷 1081-1093页

作者： LAN zhou QI ZHANG bo TIAN FENG YANG Neurosurgery Department The First Affiliated Hospital of Chongqing Medical and Pharmaceutical CollegeChongqingChina Neurosurgery Department Changdu People’s Hospital of TibetChangduChina

Background:Glioblastoma,a notably malignant tumor within the central nervous system,is distinguished by its aggressive ***,a robust inhibitor of the RNA helicase eukaryotic initiation factor 4A(eIF4A),has shown significant potential as an anticancer ***,the impact of silvestrol on glioblastoma,especially its molecular mechanisms,has not been fully ***:This investigation employed a variety of in vitro assays,such as cell counting kit-8(CCK-8),clonogenic,5-ethynyl-2′-deoxyuridine(EDU),wound healing,and flow cytometry,to evaluate cell cycle progression,apoptosis,cell viability,and *** blot analysis was also performed to study the apoptosis and extracellular regulated kinase(ERK)*** the ERK pathway was inhibited,differentially expressed genes(DEGs)in U87 cells were identified,followed by an analysis of target genes using the gene expression profiling interactive analysis(GEPIA)***:Silvestrol significantly suppressed the proliferation,migration,and colony formation of glioma *** caused cell cycle arrest and enhanced apoptosis in these ***,silvestrol stimulated the ERK pathway,with these effects being reversible by an ERK phosphorylation *** combined with GEPIA,GSCA,UALCAN,TIMER database screened 4 potential drug targets of silvestrol:chromosome 1 open reading frame 226(C1ORF226),mannosidase beta A(MANBA),IQ motif and Sec7 domain 2(IQSEC2),neuregulin 1(NRG-1).Among them,C1ORF226 was lower risk gene while MANBA,IQSEC2,and NRG-1 were high-risk ***,silvestrol notably reduced MANBA mRNA levels,which could be reversed by inhibiting ERK ***,silvestrol markedly decreased NRG-1 protein levels,with an additional reduction observed when the ERK pathway was ***:Silvestrol’s anti-glioma effects are primarily due to the suppression of MANBA expression via the ERK pathway and possibly by hindering the translation of N

关键词： Glioblastoma Silvestrol ERK pathway MANBA NRG-1

Impacts of climate change and human activities on vegetation dynamics on the Mongolian Plateau, East Asia from 2000 to 2023

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Journal of Arid Land 2024年第8期16卷 1062-1079页

作者： YAN Yujie CHENG Yiben xin Zhiming zhou Junyu zhou Mengyao WANG Xiaoyu School of Soil and Water Conservation Beijing Forestry UniversityBeijing 100083China Experimental Center of Desert Forestry Chinese Academy of ForestryDengkou 015200China Inner Mongolia Dengkou Desert Ecosystem National Observation Research Station National Forestry and Grassland AdministrationDengkou 015200China

The Mongolian Plateau in East Asia is one of the largest contingent arid and semi-arid areas of the *** the impacts of climate change and human activities,desertification is becoming increasingly severe on the Mongolian *** the vegetation dynamics in this region can better characterize its ecological *** this study,based on Moderate Resolution Imaging Spectroradiometer(MODIS)images,we calculated the kernel normalized difference vegetation index(kNDVI)on the Mongolian Plateau from 2000 to 2023,and analyzed the changes in kNDVI using the Theil-Sen median trend analysis and Mann-Kendall significance *** further investigated the impact of climate change on kNDVI change using partial correlation analysis and composite correlation analysis,and quantified the effects of climate change and human activities on kNDVI change by residual *** results showed that kNDVI on the Mongolian Plateau was increasing overall,and the vegetation recovery area in the southern region was significantly larger than that in the northern *** 50.99%of the plateau showed dominant climate-driven effects of temperature,precipitation,and wind speed on kNDVI *** analysis showed that climate change and human activities together contributed to 94.79%of the areas with vegetation *** human activities promoted the recovery of local vegetation,and climate change inhibited vegetation growth in the northern part of the Mongolian *** study provides scientific data for understanding the regional ecological environment status and future changes and developing effective ecological protection measures on the Mongolian Plateau.

关键词： kernel normalized difference vegetation index(kNDVI) human activities climate change partial correlation analysis composite correlation analysis residual analysis Mongolian Plateau

SDH-FCOS:An Efficient Neural Network for Defect Detection in Urban Underground Pipelines

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Computers, Materials & Continua 2024年第1期78卷 633-652页

作者： Bin zhou bo Li Wenfei Lan Congwen Tian Wei Yao College of Computer Science South-Central Minzu UniversityWuhan430074China

Urban underground pipelines are an important infrastructure in cities,and timely investigation of problems in underground pipelines can help ensure the normal operation of *** to the growing demand for defect detection in urban underground pipelines,this study developed an improved defect detection method for urban underground pipelines based on fully convolutional one-stage object detector(FCOS),called spatial pyramid pooling-fast(SPPF)feature fusion and dual detection heads based on FCOS(SDH-FCOS)*** study improved the feature fusion component of the model network based on FCOS,introduced an SPPF network structure behind the last output feature layer of the backbone network,fused the local and global features,added a top-down path to accelerate the circulation of shallowinformation,and enriched the semantic information acquired by shallow *** ability of the model to detect objects with multiple morphologies was strengthened by introducing dual detection *** experimental results using an open dataset of underground pipes show that the proposed SDH-FCOS model can recognize underground pipe defects more accurately;the average accuracy was improved by 2.7% compared with the original FCOS model,reducing the leakage rate to a large extent and achieving real-time ***,our model achieved a good trade-off between accuracy and speed compared with other mainstream *** proved the effectiveness of the proposed model.

关键词： Urban underground pipelines defect detection SDH-FCOS feature fusion SPPF dual detection heads

Identification and effective regulation of scarb1 gene involved in pigmentation change in autotetraploid Carassius auratus

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Zoological Research 2024年第2期45卷 381-397页

作者： Xi-Dan Xu Yue zhou Chong-Qing Wang Xu Huang Kun Zhang Xiao-Wei Xu Li-Wen He xin-Yue Zhang xin-Zhu Fu Ming Ma Qin-bo Qin Shao-Jun Liu State Key Laboratory of Developmental Biology of Freshwater Fish Engineering Research Center of Polyploid Fish Reproduction and Breeding of the State Education MinistryCollege of Life SciencesHunan Normal UniversityChangshaHunan 410081China Nansha-South China Agricultural University Fishery Research Institute GuangzhouGuangdong 511458China Hunan Yuelu Mountain Science and Technology Co.Ltd.for Aquatic Breeding ChangshaHunan 410081China College of Chemistry and Chemical Engineering Hunan Normal UniversityChangshaHunan 410081China

The autotetraploid Carassius auratus(4nRR,4n=200,RRRR)is derived from whole-genome duplication of Carassius auratus red var.(RCC,2n=100,RR).In the current study,we demonstrated that chromatophores and pigment changes directly caused the coloration and variation of 4nRR skin(red in RCC,brownish-yellow in4nRR).To further explore the molecular mechanisms underlying coloration formation and variation in 4nRR,we performed transcriptome profiling and molecular functional verification in RCC and *** revealed that scarb1,associated with carotenoid metabolism,underwent significant down-regulation in *** editing of this candidate pigment gene provided clear evidence of its significant role in RCC ***,we identified four divergent scarb1 homeologs in 4nRR:two original scarb1 homeologs from RCC and two duplicated ***,three of these homeologs possessed two highly conserved alleles,exhibiting biased and allelespecific expression in the ***,after precise editing of both the original and duplicated scarb1homeologs and/or alleles,4nRR individuals,whether singly or multiply mutated,displayed a transition from brownishyellow skin to a cyan-gray ***,the proportional areas of the cyan-gray regions displayed a gene-dose *** findings illustrate the subfunctionalization of duplicated scarb1,with all scarb1genes synergistically and equally contributing to the pigmentation of *** is the first report concerning the functional differentiation of duplicated homeologs in an autopolyploidfish,substantiallyenrichingour understanding of coloration formation and change within this group of organisms.

关键词： Autopolyploidization Coloration change scarb1 Functional differentiation Genetic changes

Positron Emission Tomography Lung Image Respiratory Motion Correcting with Equivariant Transformer

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Computers, Materials & Continua 2024年第5期79卷 3355-3372页

作者： Jianfeng He Haowei Ye Jie Ning Hui zhou bo She Faculty of Information Engineering and Automation Kunming University of Science and TechnologyYunnan Key Laboratory of Artificial IntelligenceKunming650500China School of Physics and Electronic Engineering Yuxi Normal UniversityYuxi653100China PET/CT Center Affiliated Hospital of Kunming University of Science and TechnologyFirst People’s Hospital of Yunnan ProvinceKunming650031China

In addressing the challenge of motion artifacts in Positron Emission Tomography (PET) lung scans, our studyintroduces the Triple Equivariant Motion Transformer (TEMT), an innovative, unsupervised, deep-learningbasedframework for efficient respiratory motion correction in PET imaging. Unlike traditional techniques,which segment PET data into bins throughout a respiratory cycle and often face issues such as inefficiency andoveremphasis on certain artifacts, TEMT employs Convolutional Neural Networks (CNNs) for effective featureextraction and motion ***’s unique approach involves transforming motion sequences into Liegroup domains to highlight fundamental motion patterns, coupled with employing competitive weighting forprecise target deformation field generation. Our empirical evaluations confirm TEMT’s superior performancein handling diverse PET lung datasets compared to existing image registration networks. Experimental resultsdemonstrate that TEMT achieved Dice indices of 91.40%, 85.41%, 79.78%, and 72.16% on simulated geometricphantom data, lung voxel phantom data, cardiopulmonary voxel phantom data, and clinical data, respectively. Tofacilitate further research and practical application, the TEMT framework, along with its implementation detailsand part of the simulation data, is made publicly accessible at https://***/yehaowei/temt.

关键词： PET lung scans respiratory motion correction triple equivariant motion transformer lie group motion decomposition