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我国农业发展应走规模化还是社会化道路——基于斯密分工定理的讨论

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农业经济问题 2024年第6期 4-13页

作者：陈奕山钟甫宁中山大学马克思主义学院广州510275 南京农业大学经济管理学院南京210095

从资本所有者的角度看,斯密分工定理中的“市场”是利润的来源,深化专业化分工的意义是降低产品生产的用工成本、增加利润,劳动者的就业不充分或失业问题不受关注。从我国乡村劳动者的角度看,“市场”的根本意义是就业机会和劳动收入的... 详细信息

从资本所有者的角度看,斯密分工定理中的“市场”是利润的来源,深化专业化分工的意义是降低产品生产的用工成本、增加利润,劳动者的就业不充分或失业问题不受关注。从我国乡村劳动者的角度看,“市场”的根本意义是就业机会和劳动收入的来源,“市场范围”的扩大应是就业机会的扩大;只有乡村劳动者的就业机会扩大,农业专业化分工才能不断深化,我国农业分工的历史演变脉络为此提供了事实说明。未来我国进一步深化农业专业化分工,需要在支持更多乡村劳动者实现稳定城市就业的同时,发展县域集聚经济以扩大乡村非农就业机会,使劳动者能够就近实现更充分的就业。

关键词：斯密分工定理市场范围农业专业化分工

基于肠道菌群理论的针灸治疗帕金森病合并功能性便秘的临床效果观察

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中外医药研究 2024年第16期3卷 96-98页

作者：王冉郝姗姗陈奕杉王新北京中医医院怀柔医院脑病科北京101400

目的:观察基于肠道菌群理论的针灸治疗帕金森病合并功能性便秘的临床效果。方法:选取2021年10月—2023年9月北京中医医院怀柔医院收治的帕金森病合并功能性便秘患者89例作为研究对象,以抽签法分为对照组(n=45)、观察组(n=44)。对照组实... 详细信息

目的:观察基于肠道菌群理论的针灸治疗帕金森病合并功能性便秘的临床效果。方法:选取2021年10月—2023年9月北京中医医院怀柔医院收治的帕金森病合并功能性便秘患者89例作为研究对象,以抽签法分为对照组(n=45)、观察组(n=44)。对照组实施常规治疗,观察组在对照组基础上实施基于肠道菌群理论的针灸治疗。比较两组治疗效果、便秘严重程度及胃肠神经递质水平。结果:观察组治疗总有效率高于对照组,差异有统计学意义(P=0.012);治疗后,两组慢性便秘症状严重程度量表评分降低,观察组低于对照组,差异有统计学意义(P<0.001);治疗后,两组P物质、胃动素水平升高,血管活性肠肽水平降低,且观察组优于对照组,差异有统计学意义(P<0.05)。结论:基于肠道菌群理论的针灸治疗帕金森病合并功能性便秘患者效果较好,可减轻便秘严重程度,调节胃肠神经递质水平。

关键词：帕金森病功能性便秘肠道菌群针灸

考虑电力负荷需求和分布式电源不确定性的配电网重构

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可再生能源 2024年第4期42卷 546-552页

作者：潘凯岩赵瑞锋刘尚伟卢建刚刘宏达陈奕杉哈尔滨工程大学智能科学与工程学院黑龙江哈尔滨150000 东方电子股份有限公司山东烟台264000 广东电网有限责任公司电力调度控制中心广东广州510000

随着可再生能源和可变负荷在配电系统中比例的逐步提高,配电网中电力流向的不确定性对最优网络拓扑结构的影响越来越显著。由于分布式发电和需求响应受时间因素影响,按单时段建模所得到的拓扑结构在一天中的不同时段难以达到最优。为解... 详细信息

随着可再生能源和可变负荷在配电系统中比例的逐步提高,配电网中电力流向的不确定性对最优网络拓扑结构的影响越来越显著。由于分布式发电和需求响应受时间因素影响,按单时段建模所得到的拓扑结构在一天中的不同时段难以达到最优。为解决这种不确定因素的影响,文章提出了一种基于二阶锥优化的配电网重构模型,进行计及需求响应的多时段潮流分析。基于实际配网系统所存在的“源-储-荷”结构,建立了以网络运行成本和开关运行成本为目标的约束条件,利用二阶锥松弛将非凸形式搜索空间转化为凸可行域,从而进行快速求解。在改进的IEEE 33节点配电网上进行测试分析,结果表明,文章提出的方法比传统方法具有更高的准确性和更快的求解速度。

关键词：配电网重构需求响应分布式发电二阶锥优化

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A high-resolution route map reveals distinct stages of chondrocyte dedifferentiation for cartilage regeneration

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Bone Research 2022年第3期10卷 578-593页

作者： yishan chen Yeke Yu Ya Wen Juan chen Junxin Lin Zixuan Sheng Wenyan Zhou Heng Sun chengrui An Jiansong chen Weiliang Wu Chong Teng Wei Wei Hongwei Ouyang Dr.Li Dak Sum&Yip Yio Chin Center for Stem Cells and Regenerative Medicine and Department of Orthopedic Surgery of the Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310058China Department of Sports Medicine Zhejiang University School of MedicineHangzhou 310058China Zhejiang University-University of Edinburgh Institute Zhejiang University School of Medicineand Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang ProvinceZhejiang University School of MedicineHangzhou 310058China Department of Oral Surgery Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China Department of General Intensive Care Unit The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009China Department of Orthopedic Surgery The Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhou 310052China Department of Orthopedic Surgery The Fourth Affiliated HospitalZhejiang University School of MedicineYiwu 322000China China Orthopedic Regenerative Medicine Group(CORMed) Hangzhou 310058China

Articular cartilage damage is a universal health *** recent progress,chondrocyte dedifferentiation has severely compromised the clinical outcomes of cell-based cartilage ***-of-function changes are frequently observed in chondrocyte expansion and other pathological conditions,but the characteristics and intermediate molecular mechanisms remain *** this study,we demonstrate a time-lapse atlas of chondrocyte dedifferentiation to provide molecular details and informative biomarkers associated with clinical chondrocyte *** performed various assays,such as single-cell RNA sequencing(scRNA-seq),live-cell metabolic assays,and assays for transposase-accessible chromatin with high-throughput sequencing(ATAC-seq),to develop a biphasic dedifferentiation model consisting of early and late dedifferentiation ***-stage chondrocytes exhibited a glycolytic phenotype with increased expression of genes involved in metabolism and antioxidation,whereas late-stage chondrocytes exhibited ultrastructural changes involving mitochondrial damage and stress-associated chromatin *** the chemical inhibitor BTB06584,we revealed that early and late dedifferentiated chondrocytes possessed distinct recovery potentials from functional phenotype ***,this two-stage transition was also validated in human *** image-based approach was established for clinical use to efficiently predict chondrocyte plasticity using stage-specific ***,this study lays a foundation to improve the quality of chondrocytes in clinical use and provides deep insights into chondrocyte dedifferentiation.

关键词： chondrocyte cartilage metabolism

Shale oil production predication based on an empirical modelconstrained CNN-LSTM

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Energy Geoscience

Energy Geoscience 2024年第2期5卷 232-239页

作者： Qiang Zhou Zhengdong Lei Zhewei chen Yuhan Wang yishan Liu Zhenhua Xu Yuqi Liu Research Institute of Petroleum Exploration and Development PetroChinaBeijing100083China School of Energy Resources China University of GeosciencesBeijing100083China

Accurately predicting the production rate and estimated ultimate recovery(EUR)of shale oil wells is vital for efficient shale oil *** numerical simulations provide accurate predictions,their high time,data,and labor demands call for a swifter,yet precise,*** study introduces the DuongeCNNeLSTM(D-C-L)model,which integrates a convolutional neural network(CNN)with a long short-term memory(LSTM)network and is grounded on the empirical Duong model for physical *** to traditional approaches,the D-C-L model demonstrates superior precision,efficiency,and cost-effectiveness in predicting shale oil production.

关键词： Shale oil Production prediction D-C-L Physical constraint

Seamless and early gap healing of osteochondral defects by autologous mosaicplasty combined with bioactive supramolecular nanofiber-enabled gelatin methacryloyl(BSN-GelMA)hydrogel

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Bioactive Materials 2023年第1期19卷 88-102页

作者： Hongwei Wu Yuna Shang Wei Sun Xinyi Ouyang Wenyan Zhou Jieji Lu Shuhui Yang Wei Wei Xudong Yao g Xiaozhao Wang Xianzhu Zhang yishan chen Qiulin He Zhimou Yang Hongwei Ouyang Dr.Li Dak Sum&Yip Yio Chin Center for Stem Cells and Regenerative Medicine and Department of Orthopedic Surgery of the Second Affiliated HospitalZhejiang University School of MedicineHangzhouChina Department of Sports Medicine Zhejiang University School of MedicineHangzhouChina Zhejiang University-University of Edinburgh Institute Zhejiang University School of Medicineand Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang ProvinceZhejiang University School of MedicineHangzhouChina China Orthopedic Regenerative Medicine Group(CORMed) HangzhouChina College of Chemistry Tianjin Normal UniversityTianjin300387PR China Faculty of Science The University of MelbourneParkvilleVIC3010Australia International Institutes of Medicine The 4th Affiliated Hospital of Zhejiang University School of MedicineYiwuZhejiangChina Key Laboratory of Bioactive Materials Ministry of EducationState Key Laboratory of Medicinal Chemical BiologyCollege of Life SciencesCollaborative Innovation Center of Chemical Science and Engineeringand National Institute of Functional MaterialsNankai UniversityTianjin300071China

Autologous mosaicplasty is a common approach used to treat osteochondral defects in clinical *** integration between host and transplanted plugs requires bone tissue reservation and hyaline cartilage regeneration without uneven surface,graft necrosis and ***,poor gap integration is a serious concern,which eventually leads to deterioration of joint *** deal with such complications,this study has developed a strategy to effectively enhance integration of the gap region following mosaicplasty by applying injectable bioactive supramolecular nanofiber-enabled gelatin methacryloyl(GelMA)hydrogel(BSN-GelMA).A rabbit osteochondral defect model demonstrated that BSN-GelMA achieved seamless osteochondral healing in the gap region between plugs of osteochondral defects following mosaicplasty,as early as six ***,the International Cartilage Repair Society score,histology score,glycosaminoglycan content,subchondral bone volume,and collagen II expression were observed to be the highest in the gap region of BSN-GelMA treated *** improved outcome was due to bio-interactive materials,which acted as tissue fillers to bridge the gap,prevent cartilage degeneration,and promote graft survival and migration of bone marrow mesenchymal stem cells by releasing bioactive supramolecular nanofibers from the GelMA *** study provides a powerful and applicable approach to improve gap integration after autologous *** is also a promising off-the-shelf bioactive material for cell-free in situ tissue regeneration.

关键词： Mosaicplasty Osteochondral integration Bioactive supramolecular nanofiber GelMA hydrogel Tissue engineering

超越田间生产的农业产业链条与中国农业分工发展

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南京农业大学学报（社会科学版） 2023年第4期23卷 70-81页

作者：陈奕山中山大学马克思主义学院/广东省习近平新时代中国特色社会主义思想研究中心中山大学基地广州510275

改革开放初期恢复农业家庭经营的重要理由是将农业田间生产过程交由家庭完成更有效率,但当下农业田间生产中的多主体分工并不罕见。本文基于分工的经济学经典定义即“环节分工”分析指出,如果单看农业田间生产过程,深化分工并不会显著... 详细信息

改革开放初期恢复农业家庭经营的重要理由是将农业田间生产过程交由家庭完成更有效率,但当下农业田间生产中的多主体分工并不罕见。本文基于分工的经济学经典定义即“环节分工”分析指出,如果单看农业田间生产过程,深化分工并不会显著提高产出效率,强制分工还可能抑制劳动产出效率;如果超越田间生产过程,从其与前、后端延伸环节的联系来看,农业产业链条延伸与分工深化客观存在也有利于提高产出效率。现实中随着承包户越来越多参与非农就业并退出各个田间生产环节,田间生产过程的分工趋于深化,同时,在市场化环境下弱势农户很难进入门槛较高的农业分工环节。未来中国农业深化分工既应着眼于提升产出效率、确保国家粮食安全和重要农产品供给,也不能忽视为弱势农户创造更充分的参与现代农业产业链条与分工的机会。

关键词：分工农业家庭经营生产环节农业产业链共同富裕

Epidemiological Characteristics of Human Brucellosis-China,2016−2019

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China CDC weekly 2021年第6期3卷 114-119,I0002,I0003页

作者： Zhongfa Tao Qiulan chen yishan chen Yu Li Di Mu Huimin Yang Wenwu Yin Division of Infectious Disease Key Laboratory of Surveillance and Early Warning on Infectious DiseaseChinese Center for Disease Control and PreventionBeijingChina Guizhou Provincial Center for Disease Control and Prevention GuiyangGuizhouChina China Field Epidemiology Training Project BeijingChina Emory University AtlantaGAUSA

Introduction:Brucellosis is an important zoonotic infectious disease with its main mode of transmission from livestock to *** study analyzed epidemiological characteristics of human brucellosis from 2016 to 2019 in China,aiming to understand progress of the National Program of Brucellosis Prevention and ***:The research obtained data on human brucellosis cases reported through China’s National Notifiable Disease Reporting System(NNDRS)from January 1,2016 to December 31,2019 and described brucellosis epidemiological patterns by region,seasonality,age,sex,and ***:The number of cases reported nationwide in China decreased from 47,139(3.4/100,000)in 2016 to 37,947(2.7/100,000)in 2018,and then increased to 44,036(3.2/100,000)in 2019,with an average annual incidence of 3.0/100,000 during the four study *** in Xinjiang declined from 35.6/100,000 in 2016 to 16.3/100,000 in 2019-an average annual decrease of 22.9%.Brucellosis in Inner Mongolia increased from 23.8/100,000 in 2016 to 54.4/100,000 in 2019-an average increase of 31.8%per year and accounting for 22%of all reported *** China reported 95.2%of cases during this period and still had an incidence of 7.2/100,000 and 87.0%of counties being affected by brucellosis in *** this region in 2019,males aged 45-64 years old had an incidence of over 15.9/100,000,compared with over 7.0/100,000 among females aged 45-64 years ***:Although there was progress in prevention and control of human brucellosis in some provincial-level administrative divisions(PLADs)in 2016 through 2019,progress was limited nationwide and there was an overall resurgence of brucellosis in *** resurgence was primarily in Inner *** One Health approach should be strengthened to ensure successful and sustainable brucellosis prevention and control in China.

关键词： prevention nationwide occupation

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重启农业生产过程研究

开放时代 2022年第1期 112-116页

作者：陈奕山中山大学华南农村研究中心

我所学专业是农业经济学,我想结合自己的学科背景,就"从‘学科性学术’到‘问题性学术’"这一主题谈一些理解。首先,如果将学科性学术理解为学科专业化的话,我并不认为学科性学术本身有什么不妥。人的生存和生活的问题方方面面,不可能... 详细信息

我所学专业是农业经济学,我想结合自己的学科背景,就"从‘学科性学术’到‘问题性学术’"这一主题谈一些理解。首先,如果将学科性学术理解为学科专业化的话,我并不认为学科性学术本身有什么不妥。人的生存和生活的问题方方面面,不可能依靠某一个或少数全能全知的人来解决,所以学科专业化很有必要。例如,一个人骨折了,当然得找骨科医生而不是找其他医生,更不是找人文社科领域的学者。

关键词：学科专业化农业经济学骨科医生学科性人文社科领域农业生产过程学科背景人的生存