检索结果-南通市图书馆

Genes & Diseases 2024年第4期11卷 141-144页

作者： Zhengyi Liu Chenxing Jian wenzheng yuan Guiqing jia Donghui cheng Yanzhuo Liu Yanling Zhang Bin Zhang Zili Zhou Gaoping Zhao Department of Breast Surgery Henan Provincial People's HospitalThe People's Hospital of Zhengzhou UniversityThe People's Hospital of Henan UniversityZhengzhouHenan 450003China Microbiome Laboratory Henan Provincia People's Hospital Zhengzhou University People's HospitalZhengzhouHenan 450000China Department of Gastrointestinal Surgery Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430022China Department of Gastrointestinal Surgeryll Renmin Hospital of Wuhan UniversityWuhanHubei 430060China Department of Gastrointestinal Surgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Department of Hepatobiliary Surgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China

Tumor-associated inflammation is an important component of the tumor microenvironment,and an important factor affecting tumor *** the tumor microenvironment,tumor-associated macrophages(TAMs)receive different stimuli and can be polarized into classically activated M1 macrophages and alternatively activated M2 *** studies have indicated that the polarization of TAMs is closely related to tumor progression.

关键词： nephrin tumor inflammation

单孔腹腔镜右半结肠癌根治术后尿管拔除时机探讨

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中华普外科手术学杂志（电子版） 2024年第3期18卷 271-274页

作者：金田力袁文正付涛武汉大学人民医院胃肠外科武汉430060 青岛市立医院普外科山东青岛266071

目的分析单孔腹腔镜右半结肠癌根治术后尿管拔除的最佳时机,为促进患者快速康复提供新的思路或方向。方法回顾性分析2020年1月至2021年1月医院收治的右半结肠癌患者资料,患者均行单孔腹腔镜根治术治疗,遵循相关标准从中筛选出手术结束后... 详细信息

目的分析单孔腹腔镜右半结肠癌根治术后尿管拔除的最佳时机,为促进患者快速康复提供新的思路或方向。方法回顾性分析2020年1月至2021年1月医院收治的右半结肠癌患者资料,患者均行单孔腹腔镜根治术治疗,遵循相关标准从中筛选出手术结束后2 d拔除导尿管的45例患者为2 d组,将手术结束后5 d拔除导尿管的45例患者为5 d组。采用SPSS 25.0软件处理数据,两组患者急性尿潴留、尿管相关性感染、拔管后72 h控尿率等计数资料用[例(%)]表示,采用χ^(2)检验;尿动力学指标等计量资料以(x±s)表示,行独立样本t检验。P0.05)。结论与术后2 d拔管相比,单孔腹腔镜右半结肠癌根治术后5 d的拔管尿管相关性感染发生率较高,但急性尿潴留发生率较低,临床可根据患者具体情况选择拔管时机。

关键词：结肠肿瘤单孔腹腔镜导尿管时机

Automatic depth matching method of well log based on deep reinforcement learning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Exploration and Development 2024年第3期51卷 634-646页

作者： XIONG Wenjun XIAO Lizhi yuan Jiangru YUE wenzheng China University of Petroleum Beijing 102249China Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China

In the traditional well log depth matching tasks,manual adjustments are required,which means significantly labor-intensive for multiple wells,leading to low work *** paper introduces a multi-agent deep reinforcement learning(MARL)method to automate the depth matching of multi-well *** method defines multiple top-down dual sliding windows based on the convolutional neural network(CNN)to extract and capture similar feature sequences on well logs,and it establishes an interaction mechanism between agents and the environment to control the depth matching ***,the agent selects an action to translate or scale the feature sequence based on the double deep Q-network(DDQN).Through the feedback of the reward signal,it evaluates the effectiveness of each action,aiming to obtain the optimal strategy and improve the accuracy of the matching *** experiments show that MARL can automatically perform depth matches for well-logs in multiple wells,and reduce manual *** the application to the oil field,a comparative analysis of dynamic time warping(DTW),deep Q-learning network(DQN),and DDQN methods revealed that the DDQN algorithm,with its dual-network evaluation mechanism,significantly improves performance by identifying and aligning more details in the well log feature sequences,thus achieving higher depth matching accuracy.

关键词： artificial intelligence machine learning depth matching well log multi-agent deep reinforcement learning convolutional neural network double deep Q-network

SUS441不锈钢/Al金属间化合物微叠层复合板的界面结构与力学性能

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

有色金属材料与工程 2024年第1期45卷 59-65页

作者：黄蔚泓袁文铮吴宇星刘淳熙满达魏振雄祖国胤东北大学材料科学与工程学院辽宁沈阳110819

采用“表面预处理—交替层叠—热轧复合—热处理”的工艺流程制备了SUS441不锈钢/Al金属间化合物微叠层复合板。利用光学显微镜、X射线衍射仪、扫描电子显微镜等检测与表征方法研究了热处理温度对复合板界面形貌、微观组织、物相组成、... 详细信息

采用“表面预处理—交替层叠—热轧复合—热处理”的工艺流程制备了SUS441不锈钢/Al金属间化合物微叠层复合板。利用光学显微镜、X射线衍射仪、扫描电子显微镜等检测与表征方法研究了热处理温度对复合板界面形貌、微观组织、物相组成、维氏硬度、拉伸性能的影响。结果表明:复合板界面结合良好;热处理后,固–液反应界面氧化严重,易导致界面分层而开裂;固–固、固–半固、固–液热处理后,金属间化合物层由均匀层和两相层组成,均匀层的物相组成为Fe_(2)A_(15),两相层的物相组成为Fe_(4)Al_(13)和Al_(13)Cr_(2),且两相层具有韧性特征,固–半固反应所得到的复合板的综合力学性能最佳。

关键词： SUS441不锈钢/Al 微叠层复合板热轧复合合金化界面

YOLO-CRD:A Lightweight Model for the Detection of Rice Diseases in Natural Environments

在线全文

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2024年第6期93卷 1275-1296页

作者： Rui Zhang Tonghai Liu wenzheng Liu Chaungchuang yuan Xiaoyue Seng Tiantian Guo Xue Wang Tianjin Key Laboratory of Intelligent Breeding of Major Crops Tianjin Agricultural UniversityTianjin300392China College of Computer and Information Engineering Tianjin Agricultural UniversityTianjin300392China

Rice diseases can adversely affect both the yield and quality of rice crops,leading to the increased use of pesticides and environmental *** detection of rice diseases in natural environments is crucial for both operational efﬁciency and quality *** learning-based disease identiﬁcation technologies have shown promise in automatically discerning disease ***,effectively extracting early disease features in natural environments remains a challenging *** address this issue,this study proposes the YOLO-CRD *** research selected images of common rice diseases,primarily bakanae disease,bacterial brown spot,leaf rice fever,and dry tip nematode disease,from Tianjin *** proposed YOLO-CRD model enhanced the YOLOv5s network architecture with a Convolutional Channel Attention Module,Spatial Pyramid Pooling Cross-Stage Partial Channel module,and Ghost *** former module improves attention across image channels and spatial dimensions,the middle module enhances model generalization,and the latter module reduces model *** validate the feasibility and robustness of this method,the detection model achieved the following metrics on the test set:mean average precision of 90.2%,accuracy of 90.4%,F1-score of 88.0,and GFLOPS of *** the speciﬁc diseases,the mean average precision scores were 85.8%for bakanae disease,93.5%for bacterial brown spot,94%for leaf rice fever,and 87.4%for dry tip nematode *** studies and comparative analyses veriﬁed the effectiveness and superiority of the proposed *** researchﬁnd-ings can be applied to rice disease detection,laying the groundwork for the development of automated rice disease detection equipment.

关键词： Convolutional neural network one stage training rice disease deep learning

Collective Molecular Machines: Multidimensionality and Reconfigurability

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第8期16卷 309-340页

作者： Bin Wang yuan Lu Department of Chemical Engineering Tsinghua UniversityBeijing 100084People’s Republic of China Key Laboratory of Industrial Biocatalysis Ministry of EducationTsinghua UniversityBeijing 100084People’s Republic of China

Molecular machines are key to cellular activity where they are involved in converting chemical and light energy into efficient mechanical *** the last 60 years,designing molecular structures capable of generating unidirectional mechanical motion at the nanoscale has been the topic of intense *** progress has been made,attributed to advances in various fields such as supramolecular chemistry,biology and nanotechnology,and ***,individual molecular machines are only capable of producing nanometer work and generally have only a single *** order to address these problems,collective behaviors realized by integrating several or more of these individual mechanical units in space and time have become a new *** this review,we comprehensively discuss recent developments in the collective behaviors of molecular *** particular,collective behavior is divided into two *** is the appropriate integration of molecular machines to efficiently amplify molecular motions and deformations to construct novel functional *** other is the construction of swarming modes at the supramolecular level to perform nanoscale or microscale *** discuss design strategies for both modes and focus on the modulation of features and ***,in order to address existing challenges,the idea of transferring experience gained in the field of micro/nano robotics is presented,offering prospects for future developments in the collective behavior of molecular machines.

关键词： Molecular machines Collective control Collective behaviors DNA Biomolecular motors

MAUN:Memory-Augmented Deep Unfolding Network for Hyperspectral Image Reconstruction

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1139-1150页

作者： Qian Hu Jiayi Ma yuan Gao Junjun Jiang Yixuan yuan Electronic Information School Wuhan UniversityWuhan 430072China School of Computer Science and Technology Harbin Institute of TechnologyHarbin 150001China Department of Electronic Engineering Chinese University of Hong KongHong Kong 999077China

Spectral compressive imaging has emerged as a powerful technique to collect the 3D spectral information as 2D *** algorithm for restoring the original 3D hyperspectral images(HSIs)from compressive measurements is pivotal in the imaging *** approaches painstakingly designed networks to directly map compressive measurements to HSIs,resulting in the lack of interpretability without exploiting the imaging *** some recent works have introduced the deep unfolding framework for explainable reconstruction,the performance of these methods is still limited by the weak information transmission between iterative *** this paper,we propose a Memory-Augmented deep Unfolding Network,termed MAUN,for explainable and accurate HSI ***,MAUN implements a novel CNN scheme to facilitate a better extrapolation step of the fast iterative shrinkage-thresholding algorithm,introducing an extra momentum incorporation step for each iteration to alleviate the information ***,to exploit the high correlation of intermediate images from neighboring iterations,we customize a cross-stage transformer(CSFormer)as the deep denoiser to simultaneously capture self-similarity from both in-stage and cross-stage features,which is the first attempt to model the long-distance dependencies between iteration *** experiments demonstrate that the proposed MAUN is superior to other state-of-the-art methods both visually and *** code is publicly available at https://***/HuQ1an/MAUN.

关键词： Deep folding iteration

Gradient microstructure and superior strength-ductility synergy of AZ61 magnesium alloy bars processed by radial forging with different deformation temperatures

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第3期170卷 65-77页

作者： Jingfeng Zou Lifeng Ma Yanchun Zhu Ling Qin yuan yuan School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Heavy Machinery Engineering Research Center of the Ministry Education Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Engineering University of HullCottingham RdHull HU67RXUK National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

Gradient microstructure modification is a cost-efficient strategy for high strength without compromising ductility,which is urgently needed in the fundamental science of engineering *** this study,heterogeneous structures of AZ61 alloy bars with anisotropic gradients(with different grain size distributions from the surface to the center)were observed to exhibit strong strength-ductility synergies under different deformation tem *** results reveal that the grain refinement process under mediumlow temperature deformation conditions(≤350℃)consists of four transition stages along the radial direction,i.e.,twin activations and deformation band formations,dislocation cells and pile-ups,ultrafine sub-grains,and randomly orientated quasi-micron *** deformation temperatures have a great influence on twin activations and deformation band formations,and the high temperature can easily provoke the initiation of non-basal *** deformation bands were determined as a primary nucleation site due to their highly unstable dislocation hindrance *** in combination with the Radial forging(RF)deformation process,the differences of dynamic precipitates can be attributed to microstructural difference and solubility limit of Al at different tem *** summarizing the tensile test results,the sample forged at 350℃exhibited the best strength-ductility synergy,exhibiting the highest elongation(EL)of 23.2%with a 251 MPa yield strength(YS)and 394 MPa ultimate tensile strength(UTS)in center region,and combined with the highest strength value of 256 MPa YS and 420 MPa UTS in the center region,while the EL was slightly degraded to 19.8%.

关键词： Gradient microstructure Radial forging Strength-ductility synergy Magnesium alloy Strengthening mechanism

Pyrolysis Empirical Modeling of Polyester Glass Fiber Reinforced Plastics Using Sestak-Berggren Model Method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第2期33卷 725-738页

作者： NAN Wei JI Wenhui yuan Yanping yuan Zhongyuan SUN Yong School of Mechanical Engineering Southwest Jiaotong UniversityChengdu610031China CRRC Changchun Railway Vehicles Co. LtdChangchun130062China

Polyester Glass Fiber Reinforced Plastic(Polyester GFRP),a thermosetting plastic comprised of glass fiber and polyester polymer compounds,is extensively utilized in high-speed *** its pyrolysis mechanism is crucial as it significantly influences the combustion characteristics and fire safety ***,kinetic research on polyester GFRP primarily focuses on employing the Coats-Redfern method to derive a theoretical kinetic ***,the pyrolysis process of polyester GFRP is complex and the aforementioned theoretical model fails to accurately describe the pyrolysis ***,this study seeks to utilize the Sestak and Berggren(SB) model as a methodological approach to reveal the complex reaction mechanism during the pyrolysis *** on thermogravimetric analysis,the entire pyrolysis process of polyester GFRP is divided into two primary ***,model-free methods are employed to ascertain the activation energy and pre-exponential *** results show that the fitted empirical models of the two main pyrolysis stages are f(α)=(1-α)^(1.47)[-ln(1-α)]^(1.50) and f(α)=(1-α)^(1.77)[-ln(1-α)]^(1.72),*** predicted results are in good agreement with experimental data under different heating rates,which indicates that the empirical model can sufficiently describe the pyrolysis process of polyester GFRP.

关键词： polyester GFRP model-fitting methods empirical models pyrolysis

Pseudomonotonicity of Nonlinear Transformations on Euclidean Jordan Algebras

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2024年第1期40卷 192-204页

作者： yuan-Min Li School of Mathematics and Statistics Xidian UniversityXi’an710071China

In this paper, we have introduced the concepts of pseudomonotonicity properties for nonlinear transformations defined on Euclidean Jordan algebras. The implications between this property and other P-properties have been studied. More importantly, we have solved the solvability problem of the nonlinear pseudomonotone complementarity problems over symmetric cones.

关键词： Euclidean Jordan algebra nonlinear transformation complementarity problem pseudomonotone