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乡村振兴背景下数字农业发展的对策探析

当代农村财经 2024年第8期 49-54页

作者：刘洋孙超扬东北农业大学马克思主义学院

党的二十大报告将“加快建设农业强国,扎实推动农村产业、人才、文化、生态、组织振兴”作为当前我国农业发展的重要工作来抓。当前我国数字农业发展还存在着基础设施建设尚待加强、核心技术创新动力不足、专业人才资源较为短缺等现实... 详细信息

党的二十大报告将“加快建设农业强国,扎实推动农村产业、人才、文化、生态、组织振兴”作为当前我国农业发展的重要工作来抓。当前我国数字农业发展还存在着基础设施建设尚待加强、核心技术创新动力不足、专业人才资源较为短缺等现实困境。因此,以数字技术为引擎,深入挖掘数字产品市场,建立健全数字农业人才队伍,推动农业新质生产力建设,进而促进农业高质量发展。

关键词：乡村振兴数字农业数字技术

Reversal of the immunosuppressive tumor microenvironment via platinum-based neoadjuvant chemotherapy in cervical cancer

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Cancer Pathogenesis and Therapy 2024年第1期2卷 38-49页

作者： Xue Feng Xiaolin Meng Dihong Tang Shuaiqingying Guo Qiuyue Liao Jing Chen Qin Xie Fengyuan Liu Yong Fang chaoyang sun Yingyan Han Jihui Ai Kezhen Li Department of Gynecological Oncology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430000China National Clinical Research Center for Obstetrics and Gynecology Cancer Biology Research Center(Key Laboratory of the Ministry of Education)Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430000China Department of Gynecologic Oncology Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of MedicineCentral South UniversityChangshaHunan 410000China

Background Immunotherapy favors patients with tumors;however,only 3-26.3%of patients with cervical cancer benefit from single-agent immune checkpoint *** immunotherapy and chemotherapy has been explored against tumor;however,the combination remains *** study aimed to investigate the tumor immune microenvironment(TIME)and the effects of platinum-based neoadjuvant chemotherapy(NACT)in cervical cancer to identify the clinical value of combining chemotherapy with *** Multiplex immunohistochemistry(IHC)with 11 markers(cluster of differentiation[CD]3,CD8,CD4,CD11c,CD68,forkhead box P3[Foxp3],programmed cell death 1[PD-1],programmed cell death 1 ligand 1[PD-L1],indoleamine 2,3-dioxygenase[IDO],cyclin-dependent kinase inhibitor 2A[p16],and cytokeratin[CK])was performed to evaluate TIME from 108 matched pre-and post-NACT cervical cancer *** mechanism of antitumor immunity triggered by NACT was explored using RNA sequencing(RNA-seq)from four paired samples and subsequently verified in 41 samples using *** The infiltration rate of the CD8^(+)T cells in treatment-naive cervical cancer was 0.73%,and those of Foxp3^(+)regulatory T cells(Tregs)and IDO^(+)cells were 0.87%and 17.15%,***,immunoreactive T cells,dendritic cells,and macrophages were more in the stromal than the intratumor *** increased dendritic,CD3^(+)T,CD8^(+)T,and CD4^(+)T cells and decreased *** aforementioned alterations occurred predominantly in the stromal region and were primarily in ***-responders primarily showed decreased Tregs and no increase in CD8^(+)T or dendritic cell ***,dendritic cells interacted more closely with CD3^(+)T cells after NACT,an effect primarily observed in ***-seq data revealed activation of the antigen receptor-mediated signaling pathway and upregulation of major histocompatibility complex(MHC)I and MHC II after chemotherapy,validated using ***

关键词： Neoadjuvant chemotherapy Cervical cancer Tumor immune microenvironment Spatial architecture CD8 Regulatory T cells

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TA32钛合金点阵结构成形与力学性能研究

锻压技术 2024年第7期49卷 168-178页

作者：刘杨李志强赵冰孙朝阳张宁北京科技大学机械工程学院北京100083 北京科技大学金属轻量化成形制造北京市重点实验室北京100083 中国航空制造技术研究院北京100024

通过实验和仿真研究了TA32钛合金点阵结构的超塑成形过程和点阵结构不同部位压缩/弯曲力学性能与变形特征。结果表明,优化的超塑成形气压加载曲线满足了点阵结构变形应变速率约束和良好成形的需求。基于超塑变形后的有限元网格有效地构... 详细信息

通过实验和仿真研究了TA32钛合金点阵结构的超塑成形过程和点阵结构不同部位压缩/弯曲力学性能与变形特征。结果表明,优化的超塑成形气压加载曲线满足了点阵结构变形应变速率约束和良好成形的需求。基于超塑变形后的有限元网格有效地构建了点阵结构力学性能仿真模型,并实现超塑成形缺陷的保留与传递。点阵结构的边缘蒙皮部位在超塑成形过程中出现了成形不完全和筋条扭曲等成形缺陷。边缘蒙皮部位点阵结构压缩过程变形特征主要为筋条塑性屈曲和结构的剪切变形相互作用,弯曲过程变形特征主要为筋条塑性屈曲和上面板皱曲。中心部位点阵结构的压缩、弯曲变形特征均为筋条塑性屈曲和筋条-面板间形成支撑结构。

关键词： TA32钛合金点阵结构超塑成形/扩散连接压缩弯曲力学性能

“双减”政策下农村中小学课后体育服务高质量发展的现实困境与提升路径研究

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体育科技文献通报 2024年第8期32卷 225-228页

作者：孙朝阳段续来吉首大学体育科学学院湖南吉首416000

本文采用文献资料法、实地考察法、专家访谈法等研究方法,在介绍课后体育服务发展历程,分析“双减”政策下农村中小学课后体育服务高质量发展理论依据与现实需求的基础上,探讨了“双减”政策下农村中小学课后体育服务高质量发展的现实... 详细信息

本文采用文献资料法、实地考察法、专家访谈法等研究方法,在介绍课后体育服务发展历程,分析“双减”政策下农村中小学课后体育服务高质量发展理论依据与现实需求的基础上,探讨了“双减”政策下农村中小学课后体育服务高质量发展的现实困境与提升路径。现实困境:农村中小学课后体育服务活动内容单一;育人意识薄弱,观念惯习固化:体育资源短缺;监管指导缺位。提升路径:以丰富活动内容为要点,注重地方本土化课程建设;以转变育人意识为重点,创新教学模式;以完善资源配备为基础,聚焦育人阵地;以完善相关规章制度为中心,营造育人环境。

关键词： “双减”政策农村中小学课后体育服务

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基于Web of Science的1992—2023年径流小区土壤侵蚀研究文献计量分析

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水资源与水工程学报 2024年第4期35卷 212-224页

作者：吴悦溪任小花严靖雯孙朝阳简金世西北农林科技大学资源环境学院陕西杨凌712100 西北农林科技大学水土保持科学与工程学院陕西杨凌712100

土壤侵蚀是导致水土流失、土地退化和生态系统脆弱等问题的重要因素,径流小区尺度的土壤侵蚀研究有助于深入理解侵蚀机制并制定防治策略。使用CiteSpace软件对1992—2023年间Web of Science数据库收录的径流小区土壤侵蚀研究文献进行了... 详细信息

土壤侵蚀是导致水土流失、土地退化和生态系统脆弱等问题的重要因素,径流小区尺度的土壤侵蚀研究有助于深入理解侵蚀机制并制定防治策略。使用CiteSpace软件对1992—2023年间Web of Science数据库收录的径流小区土壤侵蚀研究文献进行了文献计量分析。通过对4313篇文献的系统研究,分析了土壤侵蚀研究的主要研究机构及作者的合作与贡献情况、关键词共现以及研究热点的转移。结果显示:全球范围内该领域的发文量呈增长趋势,出现了“气候变化”“土地利用”和“黄土高原”等热点话题,美国和中国是发文量最大的国家,其中美国与欧洲国家和机构合作程度较高;研究热点从传统的侵蚀机理和监测预防转向气候变化、土地利用与遥感技术的综合应用;关键词共现与时区分析揭示了生态系统服务和可持续土地管理策略的重要性日益增加。未来关于跨尺度研究和技术应用,特别是在生态系统服务领域和遥感技术与GIS的应用方面将是研究的重点,同时也需要关注土壤侵蚀测量方法的准确性和实用性,以及全球合作在解决土壤侵蚀问题中的重要性。

关键词：土壤侵蚀径流小区文献计量分析 CiteSpace 网络图谱分析

Modeling of microstructure evolution of AZ80 magnesium alloy during hot working process using a unified internal state variable method

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Journal of Magnesium and Alloys 2022年第1期10卷 299-313页

作者： Zexing Su chaoyang sun Mingjia Wang Lingyun Qian Xintong Li School of Mechanical Engineering University of Science and Technology Beijing30 Xueyuan RoadHaidian DistrictBeijing 100083China Beijing Key Laboratory of Lightweight Metal Forming Beijing 100083China College of Nuclear Equipment and Nuclear Engineering Yantai UniversityYantai 264005China Shunde Graduate School of University of Science and Technology Beijing Foshan528000China

In this paper, a unified internal state variable(ISV) model for predicting microstructure evolution during hot working process of AZ80 magnesium alloy was developed. A novel aspect of the proposed model is that the interactive effects of material hardening, recovery and dynamic recrystallization(DRX) on the characteristic deformation behavior were considered by incorporating the evolution laws of viscoplastic flow, dislocation activities, DRX nucleation and boundary migration in a coupled manner. The model parameters were calibrated based on the experimental data analysis and genetic algorithm(GA) based objective optimization. The predicted flow stress, DRX fraction and average grain size match well with experimental results. The proposed model was embedded in the finite element(FE) software DEFORM-3 D via user defined subroutine to simulate the hot compression and equal channel angular extrusion(ECAE) processes. The heterogeneous microstructure distributions at different deformation zones and the dislocation density evolution with competitive deformation mechanisms were *** study can provide a theoretical solution for the hot working problems of magnesium alloy.

关键词： AZ80 magnesium alloy Internal state variable model Microstructure evolution Dynamic recrystallization Hot working process Finite element simulation

Constitutive relationship of IN690 superalloy by using uniaxial compression tests

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Rare Metals 2011年第1期30卷 81-86页

作者： sun chaoyang LIU Jinrong LI Rui ZHANG Qingdong DONG Jianxin School of Mechanical Engineering University of Science and Technology Beijing Beijing 100083China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The hot deformation behavior of IN690 superalloy was characterized in a temperature range of 1273-1473 K and a strain rate range of 0.01-10 s^-1 using uniaxial compression tests on process annealed *** constitutive relations between flow stress and effective strain,effective strain rate as well as deformation temperature were *** can be concluded that the flow stress significantly reduces with the deformation temperature of IN690 superalloy ***,there is a significant increase of flow stress when the strain rate increases from 0.1 s^-1 to 10 s^-*** on the hyperbolic-sine Arrhenius-type equation,a constitutive equation considering compensation of strain was *** activation energy and the material constants（Q,n and ln A） decrease as the deformation strain *** strain dependent term is successfully incorporated in the constitutive equation through a quartic equation.A good agreement between the experimental data and the predicted results has been achieved,indicating that the proposed constitutive equation and the methods of determing the material constants are suitable to model the high temperature deformation behavior of IN690 superalloy.

关键词： superalloys compression testing constitutive equations activation energy

MoS2-intercalated carbon hetero-layers bonded on graphene as electrode materials for enhanced sodium/potassium ion storage

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Nano Research 2023年第1期16卷 473-480页

作者： Laiying Jing Junwei sun chaoyang sun Di Wu Gang Lian Deliang Cui Qilong Wang Haohai Yu State Key Lab of Crystal Materials Shandong UniversityJinan 250100China School of Materials Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Key Laboratory for Special Functional Aggregated Materials of Education Ministry School of Chemistry&Chemical EngineeringShandong UniversityJinan 250100China

MoS2 is considered as an ideal electrode material in the field of energy storage due to high theoretical specific capacity and unique layered ***,limited interlayer distance and poor intrinsic electrical conductivity restrict its potential realworld ***,an alternately intercalated structure of MoS2 monolayer and N-doped porous carbon(NC)layer is grown on reduced graphene oxide(rGO)via a chemical intercalated *** expanded interlayer distance of MoS2(0.96 nm),enlarged by the intercalation of N-doped porous carbon layers,can enhance ion diffusion mobility,provide additional reactive sites for ion storage and maintain the stability of electrode *** addition,the hierarchical structures between rGO substrate and intercalated N-doped carbon layers construct a three-dimensional(3D)conductive network,which can significantly improve the electrical conductivity and the structural *** a result,the rGO-supported MoS2/NC electrode exhibits an ultrahigh reversible capacity and remarkable long cycling stability for sodium-ion batteries(SIBs)and potassium-ion(PIBs).Meanwhile,the as-obtained MoS2/NC@rGO electrode also delivers a superior cycle performance of 250 mAh·g−1 after 160 cycles at 0.5 A·g−1 when employed as an anode for sodium-ion full cells.

关键词： MoS2 graphene expanded interlayer spacing sodium-ion batteries potassium-ion batteries

泰州港泰兴港区七圩作业区内港池扩建方案研究

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水运工程 2024年第10期 51-55,89页

作者：贾鹏鹏李蕊孙朝阳王为汉交通运输部规划研究院北京100028 河海大学江苏南京211100 大连理工大学辽宁大连116024

针对泰州港泰兴港区七圩作业区散货码头能力紧张、江海船泊位不匹配等问题,提出七圩作业区内港池扩建方案,采用船舶AIS数据分析、二维潮流泥沙数值模型等方法,从通航安全和潮流泥沙的角度验证规划方案的可行性。结果表明,内港池扩建后,... 详细信息

针对泰州港泰兴港区七圩作业区散货码头能力紧张、江海船泊位不匹配等问题,提出七圩作业区内港池扩建方案,采用船舶AIS数据分析、二维潮流泥沙数值模型等方法,从通航安全和潮流泥沙的角度验证规划方案的可行性。结果表明,内港池扩建后,港池内船舶与附近水域通航环境相互影响,且港池口门及内部产生少量回淤,在采取一定的通航风险缓解措施且加强泥沙监测、及时疏浚后,规划方案是可行的。该方案可在不新增港口岸线的基础上,有效提升码头靠泊等级和作业效率,其规划思路可为其他存在运能缺口或岸线资源紧张问题的港口规划提供借鉴。

关键词：泰州港内港池规划数值模拟