检索结果-南通市图书馆

A preliminary study of early agriculture practices at the Haojiatai site in Luohe city,Henan Province

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2021年第2期64卷 307-317页

作者： zhenhua deng Hai ZHANG Wei LI Fawei LIANG Yanpeng CAO Center for the Study of Chinese Archaeology Peking UniversityBeijing 100871China School of Archaeology and Museology Peking UniversityBeijing 100871China Henan Provincial Institute of Cultural Relics and Archaeology Zhengzhou 450099China

As the most fundamental economic sector of human societies,farming has played a significant role in interactions between humans and the *** study of crop patterns in various regions could not only clarify the economic foundations of early societies,but also greatly improve our understanding of interactions among human beings,the environment,and other *** this regard,this study focuses on early agriculture practices at the Haojiatai site,situated in the cultural and natural transitional region between North and South *** plant remains from this site reveal that foxtail millet was the most important staple crop here during the Longshan and Xinzhai periods(4300–3800 *** BP),along with common millet and a small amount of rice and *** crop pattern is in contrast to the ancient environmental conditions of this region,and cultural factors such as agriculture traditions and food preferences may have been more important in the formation process of this crop pattern.

关键词： Huang-Huai Plain Longshan period Agriculture pattern Cultural influence

Relationship between the rise and fall of Loulan ancient city and centennial-scale climate events and cycles

在线全文

学校读者我要写书评

暂无评论

Frontiers of Earth Science 2023年第4期17卷 1070-1080页

作者： Deke XU Chang LI Yingyu JIN zhenhua deng Bing XU Kangkang LI Jianping ZHANG Xiaohong SUN Jing FENG Yingxin JIAO Hao LI Xiaoguang QIN Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institute of Earth Science Chinese Academy of SciencesBeijing 100029China School of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Beijing Jianhua Experimental Yizhuang School Beijing 100176China School of Archaeology and Museology Peking UniversityBeijing 100871China Geological Research Institute of China Chemical Geology and Mine Bureau Beijing 100013China Loulan Museum of Ruoqiang County Bayingol Mongolian Autonomous PrefectureXinjiang 841800China

The discovery of Loulan ancient city(LA)in the early 20th century has important significance for understanding the history of Western regions and the Silk Road *** current academic community still has disputes on whether LA was the capital of Loulan Kingdom,the time of its rise,peak and decline,and the process,rate and driving mechanism of human activity *** study uses the radio carbon dates(^(14)C)database of LA to reconstruct the history of the rise and fall of human activity,and finds that LA experienced more than~500 years from its rise to its peak and then to its decline:1)the city rose rapidly,and the population increased rapidly from~A.D.0 to 230;2)the city was prosperous and flourishing,and the intensity of human activity reached its peak from~A.D.160 to 340,especially in~A.D.230,when the population reached its peak;3)the city accelerated its decline,and the intensity of human activity decreased significantly,and the population shrank rapidly from~A.D.230 to 500;4)LA was completely abandoned after~*** results of the ^(14)C dating database do not support that LA was the early capital of the Loulan *** comparing the human activity record of LA with the existing high-resolution palaeoclimate records in the surrounding mountainous areas of the Tarim Basin and South Asia,it is found that the superposition of centennial-scale westerly circulation strength events and the~500-year cycle of the Indian monsoon jointly controlled the precipitation and meltwater(snow)supply of the mountains in the Tarim Basin,affecting the changes of surface runoff and oasis area in the basin,which is one of the important factors causing the rise and fall of LA.

关键词： ^(14)C probability density time series analysis ~500-year cycle Indian monsoon westerly circulation

Regulatory T cells improved the anti-cirrhosis activity of hAMSC in the liver by regulating TGF-β-IDO signaling

在线全文

学校读者我要写书评

暂无评论

Regulatory T cells improved the anti-cirrhosis activity of h...

第十四届全国免疫学学术大会

作者： Jinren Zhou zhenhua deng Yongxiang Xia Jiangsu Provincial People’s Hospital

Liver fibrosis is a progression stage of chronic liver disease,while current therapies can not cure or attune cirrhosis *** amniotic mesenchymal stromal cell(hAMSC) presented immunoregulatory and tissue repairability of multiple *** T cells(Treg) had been proved to be functional in reducing immune cell *** showed that co-infusion of hAMSC and Treg prevented mild liver fibrosis comparing with hAMSC or Treg alone *** vitro study indicated that the addition of Treg or the supernatant of Treg improved the HGF secreting and cell differentiation ability of *** of TGF-β significantly decreased the HGF secreting and differentiation of *** signal neutralizers were added to the culture to understand further the mechanism,which showed that 1-MT,the suppressor of IDO,was involved in the effect of TGF-β in regulating *** of TGF-β or IDO signaling successfully abolished the effect of Treg in improving hAMSC’s function both in vitro and ***,our result indicated that Treg improved the function of hAMSC by regulating the TGF-β-IDO signaling and co-infusion of hAMSC and Treg provided a promising approach for treating liver cirrhosis.

关键词： Liver cirrhosis hAMSC Treg IDO TGF-β

在线全文

cnki会议

学校读者我要写书评

暂无评论

金沙江流域农业的形成与早期发展

中华文化论坛 2023年第1期 142-153,190页

作者：邓振华北京大学考古文博学院北京100871

金沙江流域自古以来是中国西南地区不同族群聚居繁衍、交流互动的重要区域,沿横断山区的人群迁徙和文化传播促成了距今5000年左右这一地区新石器化和农业化进程的开始,为丰富多元的区域文化的形成奠定了经济基础。当地的农业经济在形成... 详细信息

金沙江流域自古以来是中国西南地区不同族群聚居繁衍、交流互动的重要区域,沿横断山区的人群迁徙和文化传播促成了距今5000年左右这一地区新石器化和农业化进程的开始,为丰富多元的区域文化的形成奠定了经济基础。当地的农业经济在形成之初就具有稻粟黍混作的多样化特征,其后小麦、大麦、荞麦等其他农作物在青铜时代传入,使得作物结构更加多样化。金沙江流域作为西南地区重要的地理单元,其农业特色的形成是沿横断山区频繁的文化交流和本地复杂多样的地貌与生态条件共同作用的结果。

关键词：金沙江流域新石器化农业传播稻旱混作农业多样化

Distributed Optimization of Second-Order nonlinear Multi-Agent Systems Subject to Communication Delays

在线全文

学校读者我要写书评

暂无评论

Distributed Optimization of Second-Order nonlinear Multi-Age...

第三十九届中国控制会议

作者： Shiling Li Xiaohong Nian zhenhua deng Zhao Chen School of Automation Central South University

In this paper, the distributed optimization problem of continuous-time second-order nonlinear multi-agent systems with communication delays under undirected graphs is studied. First, we show that the equilibrium point of the multi-agent systems with time delays is corresponding to the optimal solution of the problem. Next, based on gradient descent, we propose a distributed optimization algorithm. Besides, we analyze the global convergence of the algorithm by constructing a suitable Lyapunov function and linear matrix inequality. Finally, an example is presented to illustrate the effectiveness of our result.

关键词： Distributed optimization multi-agent systems nonlinear systems communication delays

Generalized Nash equilibrium seeking strategy for multi-cluster games

在线全文

cnki会议

学校读者我要写书评

暂无评论

Generalized Nash equilibrium seeking strategy for multi-clus...

第40届中国控制会议

作者： Yan Zhao Tao Chen Yangyang Liu zhenhua deng Yang Hu School of Automation Central South University

In this paper, multi-cluster games over weight-balanced digraphs are studied, where the cost functions of all players depend on not only their own decisions but also the decisions of players in other clusters. The cost functions of players are nonsmooth, and the decisions of all players are constrained by coupling constraints. In order to seek the variational generalized Nash equilibrium(GNE) of the multi-cluster games, we design an algorithm via gradient descent and differential inclusions, and its convergence to the variational GNE is proven with the help of Lyapunov stability theory and variational analysis.

关键词： Multi-cluster games generalized Nash equilibrium(GNE) coupling constraints weight-balanced digraphs

Predefined-Time Distributed Optimization Problem Subject to Equality Constraint of Second-Order Multi-Agent Systems

在线全文

cnki会议

学校读者我要写书评

暂无评论

Predefined-Time Distributed Optimization Problem Subject to ...

第40届中国控制会议

作者： Shiling Li Xiaohong Nian zhenhua deng Zhao Chen Chongxin Lei School of Automation Central South University

In this paper, we consider the predefined-time distributed optimization problem of second-order multi-agent systems under undirected and connected communication networks, in which, the optimization problem subject to the equality *** order to make all agents converge to the optimal solution at predefined-time, we propose a distributed predefined-time control law based on time-base generator technique. Then we guarantee the convergence of the proposed algorithm by the properties of Laplace matrix and orthogonal matrix. Finally, we provide example to illustrate the effectiveness of the proposed distributed algorithm by choosing arbitrary initial values of states and arbitrary convergence time.

关键词： Distributed optimization multi-agent systems second-order systems predefined-time convergence

“功”“过”交织:“职业教育作为类型教育”的辩证认识——高等教育层次的视角

在线全文

cnki会议

学校读者我要写书评

暂无评论

江苏高教 2023年第3期 113-119页

作者：方泽强黎旋邓振华广东工商职业技术大学校办广东肇庆526020 广东工商职业技术大学职业教育与产业发展研究院广东肇庆526020 广东工商职业技术大学教务处广东肇庆526020

在高等教育层次,职业教育是不同于普通教育的教育类型的认识并非自然而然产生,而是历经了实践探索和理论研究,并先后经教育政策和法律确认。职业教育作为类型教育,一方面,优势是明显的:促使职业教育纵向贯通并完善职业教育体系,促使职... 详细信息

在高等教育层次,职业教育是不同于普通教育的教育类型的认识并非自然而然产生,而是历经了实践探索和理论研究,并先后经教育政策和法律确认。职业教育作为类型教育,一方面,优势是明显的:促使职业教育纵向贯通并完善职业教育体系,促使职业教育形成独立的行政管理体制,促使职业教育探索个性化的教育改革。另一方面,弊端和风险也是存在的:容易引起职业教育体系的封闭,造成教育属性的缺位,忽视教育多样化建设。前者为人所知晓,后者往往被遮蔽或忽视。推进职业教育健康可持续发展,需要从更开放、更全面、更宽广的视角来认识类型教育,并针对弊端和风险采取积极行动。

关键词：职业教育类型教育价值问题治理对策

专业遴选与区域产业的匹配性研究——基于广东省国家级现代学徒制试点专业分析

在线全文

学校读者我要写书评

暂无评论

曲靖师范学院学报 2022年第3期41卷 103-113页

作者：邓振华广东工商职业技术大学创新创业学院广东肇庆520620

专业设置与区域经济发展之间的匹配关系是职业教育领域研究的重点问题.《国家职业教育改革实施方案》对职业学校专业提出了对接产业发展的具体要求.以广东省参与国家级现代学徒试点专业和学校为研究对象,从试点专业类别分布、试点专业... 详细信息

专业设置与区域经济发展之间的匹配关系是职业教育领域研究的重点问题.《国家职业教育改革实施方案》对职业学校专业提出了对接产业发展的具体要求.以广东省参与国家级现代学徒试点专业和学校为研究对象,从试点专业类别分布、试点专业办学层次、试点学校性质、试点学校分布等方面结合广东省“一核一带一区”产业发展格局,深入剖析广东省当前的现代学徒制试点的现状和问题.面对区域经济发展和职业教育发展的新形势、新要求,提出在新一轮的专业建设过程中要从现代学徒制专业选择与区域经济发展的关系、试点学校学校性质、试点专业人才培养规格与人才需求结构的匹配性等方面进行反思.

关键词：区域产业发展现代学徒制试点专业广东省