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Evolution and Determinants of Population Agglomeration in Less Developed Metropolitan Areas:A Case Study of the Taiyuan Metropolitan Area,China

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Chinese Geographical Science 2024年第4期34卷 739-751页

作者： QIN Zhiqin liang ye AN Shuwei DOU Yongjing School of Economics and Management Shanxi UniversityTaiyuan 030031China School of Urban Economics and Public Affairs Capital University of Economics and BusinessBeijing 100070China School of Geography Science Taiyuan Normal UniversityJinzhong 030619China

It is of importance to enhance the urban areas'capacity for population aggregation in underdeveloped regions,aiming to rectify the imbalanced and insufficient pattern of economic development in *** the Taiyuan Metropolitan Area(TMA)in central China as a case study,this paper examines the evolutionary process and characteristics of population agglomeration from 2000 to 2020,and identifies factors associated with agglomeration and their spatial *** findings indicated that:1)against the background of sustained population shrinkage in the provincial area,the TMA showed a demographic trend of steady increase,albeit with a decelerated growth *** the metropolitan area,urban population size continued to grow rapidly,whereas the rural areas endured sustained *** in city size continued to widen,and the polarization of concentrated population in the core cities kept increasing.2)Agglomerations in both secondary and service industries had significant positive effects on local population agglomeration,with the former effect being *** economic development,government fiscal expenditure,and financial advancement all contributed to facilitating local population *** a spatial spillover perspective,service agglomeration and financial development promoted population agglomeration in surrounding ***,fiscal expenditure inhibited such *** for industrial agglomeration and regional economic development,their spatial spillover effects were *** results obtained reveal several policy implications aimed at enhancing the population agglomeration capacity of the metropolitan area in underdeveloped regions during the new era.

关键词： population agglomeration population shrinkage spatial spillover effects Taiyuan Metropolitan Area(TMA) China

Navigation for autonomous vehicles via fast-stable and smooth reinforcement learning

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Science China(Technological Sciences) 2024年第2期67卷 423-434页

作者： ZHANG RuiXian YANG JiaNan liang ye LU ShengAo DONG YiFei YANG BaoQing ZHANG LiXian School of Astronautics Harbin Institute of TechnologyHarbin 150001China

This paper investigates the navigation problem of autonomous vehicles based on reinforcement learning(RL)with both stability and smoothness *** introducing a data-based Lyapunov function,the stability criterion in mean cost is obtained,where the Lyapunov function has a property of fast ***,an off-policy RL algorithm is proposed to train safe policies,in which a more strict constraint is exerted in the framework of model-free RL to ensure the fast convergence of policy generation,in contrast with the existing RL merely with stability *** addition,by simultaneously introducing constraints on action increments and action distribution variations,the difference between the adjacent actions is effectively alleviated to ensure the smoothness of the obtained policy,instead of only seeking the similarity of the distributions of adjacent actions as commonly done in the past literature.A navigation task of a ground differentially driven mobile vehicle in simulations is adopted to demonstrate the superiority of the proposed algorithm on the fast stability and smoothness.

关键词： autonomous vehicles navigation reinforcement learning smoothness stability

Distribution and sources of sedimentary organic matter in different aquaculture areas of northeastern Zhanjiang Bay using stable carbon and nitrogen isotopes

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Acta Oceanologica Sinica 2024年第6期43卷 38-48页

作者： Fengxia Zhou Shuangling Wang Han Fang Jiani He liang ye Zhaohai Ding Cuiting Li Fajin Chen Xuan Lu Chunqing Chen Yafei Meng College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China Key Laboratory for Coastal Ocean Variation and Disaster Prediction Guangdong Ocean UniversityZhanjiang 524088China Key Laboratory of Climate Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong ProvinceGuangdong Ocean UniversityZhanjiang 524088China

Zhanjiang Bay is a major aquaculture area in China with many types of mariculture products(such as oysters,fish,and shrimp).The culture area and shrimp output in Zhanjiang Bay are ranked first in *** investigated the total organic carbon(TOC),total nitrogen(TN),TOC/TN ratio,and stable isotopes(δ^(13)C and δ^(15)N) of the fish and shrimp feed,fish and shrimp feces,and sedimentary organic matter(SOM) in and around different aquaculture areas of northeastern Zhanjiang B ay to study the impact of aquaculture activities on *** average TOC contents of fish and shrimp feed were 39.20%±0.91% and 39.29%±0.21%,*** average TOC content in the surface sediments of the oyster culture area,the mixed(fish and shrimp) culture area,and the cage fish farm area were 0.66%,0.88%±0.10%,and 0.58%±0.19%,respectively,which may indicate that mixed culture had a greater impact on *** relatively high TOC and TN contents and relatively low TOC/TN ratios,and δ^(15)N values in the upper layer of the core sediment in the mixed culture area could also support the significant influence of mixed *** average δ^(13)C and δ^(15)N values of fish and shrimp feed were -20.6‰±2.2‰ and 1.8‰±1.2‰,respectively,which were different from the isotopic values of SOM in the study area.δ^(13)C and δ^(15)N values for SOM in different aquaculture areas were different from those of nearby reference stations,probably reflecting the influence of *** δ^(13)C and δ^(15)N values in the oyster culture area(-25.9‰ and6.0‰,respectively) seemed to have reduced δ^(13)C and enriched δ^(15)N relative to those of the reference station(-24.6‰ and 5.8‰,respectively).This may reflect the influence of organic matter on oyster *** δ^(15)N value of the station in the mixed culture area(7.1‰±0.4‰) seemed to be relatively enriched in δ^(15)N relative to that of the reference station(6.6‰).Sedimentation and the subsequent degradation of organic matter from mixed cultures may have contrib

关键词： sedimentary organic matter aquaculture stable isotopes sources Zhanjiang Bay

晚清海关与1887—1888年拯救华茶贸易调查行动

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农业考古 2024年第2期 70-80页

作者：梁晔福建师范大学外语学院

1887—1888年,晚清海关组织开展大规模的茶叶国际贸易调查行动,从国内外市场竞争格局入手,剖析当时华茶出口下滑的原因,提出改进茶叶品质和提升茶业经营管理等建议。然而,受制于种种因素,海关未能深刻地认识到十九世纪晚期全球贸易自由... 详细信息

1887—1888年,晚清海关组织开展大规模的茶叶国际贸易调查行动,从国内外市场竞争格局入手,剖析当时华茶出口下滑的原因,提出改进茶叶品质和提升茶业经营管理等建议。然而,受制于种种因素,海关未能深刻地认识到十九世纪晚期全球贸易自由化趋势和茶叶国际生产贸易格局之变迁,其提出的改良措施仅停留在技术层面,未触及国内茶产业经营管理和相关税收制度之积弊,再加上晚清政府改良措施无法有效落实,未能挽回从晚清延续到民国之华茶出口衰败的命运。

关键词：晚清海关茶叶国际贸易

论《个人信息保护法》的合作治理定位--基于倾斜保护型法的视角

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河北学刊 2024年第3期44卷 208-216页

作者：王业亮中国人民大学经济学院

《个人信息保护法》具有公私法融合的属性,采取何种治理框架成为亟待解决的理论与实践问题。欧盟、美国与中国的个人信息保护均形成了合作治理的基础框架。个人信息保护法的关注重点在于信息主体与信息处理者之间的持续性不平等以及信... 详细信息

《个人信息保护法》具有公私法融合的属性,采取何种治理框架成为亟待解决的理论与实践问题。欧盟、美国与中国的个人信息保护均形成了合作治理的基础框架。个人信息保护法的关注重点在于信息主体与信息处理者之间的持续性不平等以及信息处理关系的外部性,因而与劳动法、消费者权益保护法等倾斜保护型法构成家族相似。应参照倾斜保护型法的既有制度经验,进一步构建《个人信息保护法》公私法协同的合作治理框架。具体而言,可从自由主义家长制的告知同意制度、公共信托制度与公益诉讼制度三个方面进行重构。

关键词：个人信息保护法合作治理倾斜保护型法家族相似

不同浓度下二元弱酸酸式盐中微粒浓度的大小比较

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化学教学 2024年第6期 93-97页

作者：叶樑广州市第八十九中学广东广州510520

在二元弱酸的酸式盐溶液中,存在多个可逆过程。通常状况下,平衡常数大的反应主宰了体系的主要性质,因为HA^(-)质子自递反应平衡常数最大,所以可以主宰整个体系的性质,但随着盐溶液浓度的降低,HA^(-)离子浓度的迅速降低,HA^(-)质子自递... 详细信息

在二元弱酸的酸式盐溶液中,存在多个可逆过程。通常状况下,平衡常数大的反应主宰了体系的主要性质,因为HA^(-)质子自递反应平衡常数最大,所以可以主宰整个体系的性质,但随着盐溶液浓度的降低,HA^(-)离子浓度的迅速降低,HA^(-)质子自递反应对体系的影响会逐渐降到HA^(-)的水解或电离、甚至是水的电离相同的程度或之下,从而造成了在各个阶段,二元弱酸的酸式盐溶液中微粒浓度的大小排序的不同。通过对各可逆过程平衡常数的分析,结合守恒关系,定量分析出各阶段分界线的标志性浓度。

关键词：二元弱酸酸式盐溶液 HA^(-)质子自递反应多平衡竞争溶液浓度微粒浓度大小

环化核苷酸合成酶-干扰素刺激因子信号通路在呼吸系统疾病中的研究进展

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中华结核和呼吸杂志 2024年第3期47卷 252-258页

作者：钱军航叶亮谭焰南京医科大学附属南京医院(南京市第一医院)呼吸与危重症医学科南京210006

环化核苷酸合成酶(cGAS)是一种DNA感受器,通过环鸟苷酸-腺苷酸(cGAMP)将信号传递给干扰素刺激因子(STING),诱导下游通路产生一系列免疫及炎症反应。近年的研究表明,cGAS-STING信号通路在肺部感染性疾病、肺癌、特发性肺纤维化、慢性阻... 详细信息

环化核苷酸合成酶(cGAS)是一种DNA感受器,通过环鸟苷酸-腺苷酸(cGAMP)将信号传递给干扰素刺激因子(STING),诱导下游通路产生一系列免疫及炎症反应。近年的研究表明,cGAS-STING信号通路在肺部感染性疾病、肺癌、特发性肺纤维化、慢性阻塞性肺疾病、支气管哮喘和急性肺损伤等多种呼吸系统疾病的发生发展中发挥重要作用,为呼吸系统疾病的诊断和治疗提供了新的靶点。本文综述了cGAS-STING信号通路及其在呼吸系统疾病研究中的最新进展。

关键词：特发性肺纤维化呼吸系统疾病肺部感染性疾病慢性阻塞性肺疾病支气管哮喘刺激因子信号通路环鸟苷酸

Advances of Pipeline Model Parallelism for Deep Learning Training:An Overview

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Journal of Computer Science & Technology 2024年第3期39卷 567-584页

作者：关磊李东升梁吉业王文剑葛可适卢锡城 College of Science National University of Defense TechnologyChangsha 410073China College of Computer National University of Defense TechnologyChangsha 410073China School of Computer and Information Technology Shanxi UniversityTaiyuan 030006China CCF IEEE

Deep learning has become the cornerstone of artificial intelligence,playing an increasingly important role in human production and ***,as the complexity of problem-solving increases,deep learning models become increasingly intricate,resulting in a proliferation of large language models with an astonishing number of *** model parallelism(PMP)has emerged as one of the mainstream approaches to addressing the significant challenge of training“big models”.This paper presents a comprehensive review of *** covers the basic concepts and main challenges of *** also comprehensively compares synchronous and asynchronous pipeline schedules for PMP approaches,and discusses the main techniques to achieve load balance for both intra-node and inter-node ***,the main techniques to optimize computation,storage,and communication are presented,with potential research directions being discussed.

关键词： deep learning pipeline schedule load balance multi-GPU system pipeline model parallelism(PMP)

“双碳”目标下的第五立面景观生态设计研究——以淮南新华书店为例

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淮南师范学院学报 2024年第3期26卷 105-110页

作者：梁晔淮南师范学院美术与设计学院安徽淮南232038

为应对全球气候变化,我国提出以“双碳”为目标的城市环境治理举措。建筑第五立面空间作为城市景观设计中不可或缺的组成部分,其设计在改善城市环境方面发挥重要作用。文章以淮南新华书店的第五立面空间为例,从植物配置、空间布局及可... 详细信息

为应对全球气候变化,我国提出以“双碳”为目标的城市环境治理举措。建筑第五立面空间作为城市景观设计中不可或缺的组成部分,其设计在改善城市环境方面发挥重要作用。文章以淮南新华书店的第五立面空间为例,从植物配置、空间布局及可持续管理办法三方面对空间进行合理化分析,制定效果评估指标与方法,旨在实现城市第五立面的景观空间品质的提升,以期为第五立面的景观设计项目提供参考,凸显第五立面景观设计在实现“双碳”目标中的作用和意义。

关键词： “双碳”目标城市建筑第五立面景观设计