Spatiotemporal Differences and Classification Regulation of Urbanization Impact on Agricultural Development in Shrinking Areas:A Case Study of 15 Shrinking Cities in Three Provinces of Northeast China

Studying the impact of urbanization on agricultural development in shrinking areas is important for maintaining food security and promoted agricultural development in China.Based on the measurement results of the shrinking cities in the three provinces of Northeast China,this paper selects 15 shrinking cities as the research object,and constructs a multi-dimensional index system to explore the impact of the urbanization level of the shrinking areas on the agricultural development in the region since 2007–2019,analyzes the influencing factors and their differences by using the geographically-weighted regression model and Geodetector,and proposes a targeted regulation strategy.The results show that:1)overall,there is a negative correlation between the urbanization level and the agricultural development level in the contracted areas of the three northeastern provinces.The urbanization level in these areas has a certain negative impact on the overall level of agricultural development;2)regarding the time dimension,the impact of urbanization level on the agricultural development level in the contracted areas of the three northeastern provinces gradually increases over time;3)regarding the spatial pattern,the overall impact of shrinking urbanization levels in the three provinces of Northeast China on the agricultural development shows a significant distribution pattern of high in the east and low in the west;4)the total population and natural population growth rate at the end of the year were the main factors influencing a certain level of urbanization on agricultural development in the shrinking cities while population density and the urban fixed asset investment rate were the secondary factors;and 5)the main reasons why the level of agricultural development in different cities was affected by the level of urbanization were different.However,they can be categorized into areas of population loss and spatial construction,which can be further divided into area of population loss in the northeast,areas of negative population growth in the west,and areas of urban spatial change in the south.According to the causes of the impact,this paper adopted targeted regulation strategies and formulated relevant policies and solutions that cater to local conditions.

Environmental Effects of Foreign Trade and Its Spatial Variations in Mid-eastern Provinces and Cities of China

The studies on environmental effects of foreign trade and its spatial variations are helpful to design and implement environmental protection countermeasures.In order to eliminate the adverse effects of insufficient observation values on the accuracy of regression results and dynamic information quantity of fitting equation during empirical study,panel data of the mid-eastern provinces and cities of China from 1985 to 2007 were selected based on the adjustment of classical regression model in this paper.Panel unit root test and panel cointegration analysis method were applied to investigating the environmental effects of foreign trade and its spatial variations in the mid-eastern provinces and cities of China and its three groups divided by foreign trade dependence.The results show that all scale effects are positive,while all technical effects are negative and unable to counteract positive scale effects.Foreign trade development is regarded as an important cause for outstanding eco-environmental problems in the mid-eastern provinces and cities of China.Total effects and structural effects are significantly different among different groups because of spatial variations in environmental policies,export destinations,source of FDI,etc.Following the principle of′coordinating generality and considering differences comprehensively′,it is essential to issue a series of policies and countermeasures corresponding to differences in regional environmental effect of foreign trade,in order to coordinate the relationship between foreign trade development and eco-environment in each region.

Mantle plume,large igneous province and continental breakup——Additionally discussing the Cenozoic and Mesozoic mantle plume problems in East China

Based on the former workers' study results such as numerical simulation of fluid mechanics, seismic tomography of the whole earth and igneous rocks, the basie characteristics of mantle plumes are summarized in detail, namely the mantle plume, from the D" layer near the core-mantle boundary (CMB) of 2900 km deep, is characterized by the shape of large head and thin narrow conduit, by the physical property of high temperature and low viscosity. The LIP (large igneous province) is the best exhibition when the mantle plume ascends to the surface. According to the basie characteristics of the mantle plumes and the LIP, as well as the temporal-spatial relationships between the mantle plume and Continental breakup, the detailed research on petrology, geochemistry, temporal-spatial distribution, tectonic background of the Cenozoic-Mesozoic igneous rocks and gravity anomaly distribution in East China has been done. As a result, the Mesozoic igneous rocks in Southeast China should not be regarded as an example of typical LIP related to mantle plumes, for their related characteristics are not consistent with those of the typical LIPs related to mantle plumes. The Cenozoic igneous rocks in Northeast China have no the typical characteristics of mantle plumes and hotspots, so the Cenozoic volcanism in Northeast China might have no the direct relationships with the activity of mantle plumes.

Towards Sustainable Urban Environmental Management in Jiangyin city, East China

Dramatic economic and social changes have taken place in Jiangyin city due to rapid and uneven urbanization and industrialization. The environmental degradation has followed driven by these changes since the 1980's. With the pressures and effects of environmental deterioration, the city has implemented environmental management to hold back the trends of negative environmental changes. From the viewpoint of systems, DPSER is a good model for urban environmental changes to understand the causes, pressure, state, effect, existing responses and future action strategies. We took Jiangyin city, a developed city in South Jiangsu province, East China, as an example, and analyzed the characteristics of environmental changes and urban responses using DPSER model. Some operational strategies have been put forward to direct the city environmental management towards a sustainable road step by step.

Dynamics of the coronavirus disease 2019(COVID-19)epidemic in Wuhan City,Hubei Province and China:a second derivative analysis of the cumulative daily diagnosed cases during the first 85 days

Background:Controlling the coronavirus disease 2019(COVID-19)epidemic requires information beyond new and cumulative cases.This study aims to conduct an in-depth analysis by geographic strata:Wuhan City(hereafter referred to as Wuhan)only,Hubei Province(hereafter referred to as Hubei)excluding Wuhan,and China excluding Hubei.Methods:Daily cumulative confirmed COVID-19 cases between December 8,2019(the date of symptom onset based on patients'recall during the investigation),and March 1,2020,from official sources and published studies were analyzed.The second derivative model was used for information extraction.Data analysis was conducted separately for the three strata.Results:A total of 80026 diagnosed COVID-19 cases were reported during the first 85 days of the epidemic,with 49315 cases from Wuhan,17788 from Hubei excluding Wuhan,and 12923 from China excluding Hubei.Analytical results indicate that the COVID-19 epidemic consists of an Acceleration,a Deceleration,and a Stabilization Phase in all three geographic strata,plus a Silent Attack Phase for Wuhan only.Given the reported incubation period of 14 days,effects of the massive anti-epidemic actions were revealed by both the Acceleration and Deceleration Phases.The Acceleration Phase signaled the effect of the intervention to detect the infected;the Deceleration Phase signaled the declines in new infections after the infected were detected,treated and quarantined.Conclusion:Findings of the study provide new evidence to better monitor the epidemic,evaluate its response to intervention,and predict the trend long.In addition to re-evaluating the control of the COVID-19 epidemic in China,this study provided a model for monitoring outbreaks of COVID-19 in different countries across the world.

Hand in Hand East and West to Build a Glorious Gansu——Talk on the cooperation between the East and West of China by Mr.Cui Zhenghua,vice governor of Gansu Province

To implement the CPC CentralCommittee’s strategy of slanting theeconomic construction to the Midand West of China and to further promote thedevelopment and cooperation of economyand trade between the East and West, theEast-West Business and Trade Talks wereheld by the China Council for the Promotionof International Trade (CCPIT). At theconference, Mr. Cui Zhenghua, vice governorof Gansu Province and concurrently chairmanof the Gansu Subcouncil of the CCPIT,delivered a speech on the economiccooperation and development between theEast and West of China.

Late Jurassic-Early Cretaceous Erg Deposits in the Mengyin Basin, Western Shandong Province, China: Inferences about the Wind Regime and Paleogeography

The Late Jurassic-Early Cretaceous Santai Formation, sporadically distributed in western Shandong Province, comprises terrestrial alluvial-eolian successions, which records regional wind patterns and paleogeography in eastern North China. This paper conducts an analysis of eolian stratification, bounding surfaces, facies architecture and paleowind direction of the Santai Formation in the east of the Mengyin Basin, western Shandong Province. Three basic types of eolian stratification are recognized in the Santai Formation, including grainflow strata, wind ripple strata and adhesion strata, and have been grouped into eolian dune and interdune facies associations. The occurrences of reactivation surfaces and superimposition surfaces within eolian dune deposits indicate active compound dunes or draas. The association of adhesion strata with grainflow or windripple strata is the development of a wet eolian system. Cross-strata dip direction indicates different paleowind directions from the lower to the upper part of the Santai paleoerg. The lower part of the paleoerg was characterized by paleowinds blowing from northwest to northeast, whereas the upper part was under the influence of paleowinds consistently towards east to northeast. The identified changes in wind directions possibly suggest wind regime shifts from monsoon circulation to westlies of planetary wind system, which may be related with the collapse of the East China Plateau during the Late Jurassic to Early Cretaceous.

Evaluation of urban underground space resources using a negative list method: Taking Xi'an City as an example in China

Utilization of urban underground space has become a vital approach to alleviate the strain on urban land resources,and to optimize the structure and pattem of the city.It is also very important to improve the city environment,build livable city and increase the capacity of the city.Based on the analysis of existing evaluation methods and their problems,a method for evaluating underground space resources based on a negative list of adverse factors affecting underground space development is proposed,to be primarily used in urban planning stages.A list of the adverse factors is established,including limiting factors,constraining factors and influencing factors.Taking Xi'an as an example,using a geographical information system platform,a negative list of adverse factors for the underground space resources in Xi'an City are evaluated,and preventive measures are proposed.Natural resources,exploitable resources,and the potential growth of exploitable underground space resources are evaluated.Underground space assessment in the different development stages of the city,collaborative utilization and safety evaluation for multiple subsurface resources,environmental impact and assessment,as well as evaluation methods based on big data and intelligent optimization algorithms are all discussed with the aim of serving city planning and construction.

Fabulous Finish Wuhan City, Hubei Province, China

Helalia Johannes (right),a marathon runner from Namibia, wins the women’s5 km title in 15 minutes14.23 seconds at the Seventh CISM Military World Games in Wuhan, capital of central China’s Hubei Province, on October 24. The 39-yearold runner holds Namibian records in 10 km and 20 km races.

Green transformation mechanisms and implementation path for agricultural clusters:A case study of the vegetable cluster in Shouguang city,Shandong province,China

Promoting the green transformation of agricultural clusters represents an effective strategy to address pressing issues related to agricultural resources and environmental concerns.However,existing literature provides limited insights into the internal mechanisms and pathways for achieving green transformation of agricultural clusters.To address the challenges in international research on the collaborative green transformation of entire agricultural value chains,a theoretical analysis framework is constructed in this study,which is characterized by“point-line-plane three-layer embeddedness and four-force interaction,”positioning green innovation as a pivotal entry point.Through social network analysis,this study examines the processes and mechanisms underlying the collaborative green transformation of agricultural clusters and proposes viable pathways for implementation using the Shouguang vegetable industrial cluster as a case study.The research findings are as follows:(1)The green transformation of agricultural clusters includes the green transformation of cluster behavior actors(point),formation of a green innovation network(line),construction of a green environment(plane),and embedded integration and coordinated transformation of the three.Green innovations generated by leading enterprises,universities,and research institutions serve as the foundation for this transformation,whereas farmers'adoption of these innovations forms the basis,and government policies provide regulatory environment to ensure successful implementation.The transformation is realized through green collaborative innovation and governance,achieving the“three-layer embeddedness.”(2)Under the influence of four driving forces,namely,market-driven mechanisms,environmental regulations,green innovation,and multidimensional proximity,actors at various levels form and embed green innovation networks that are integrated into regional environments through institutional constraints.This results in a“five-in-one”system of collaborative green innovation and governance encompassing enterprises,industries,technologies,institutions,and spatial dimensions,which constitute the internal mechanisms for the green transformation and upgrading of agricultural clusters.(3)Building on the“three-layer and four-force”framework,this study proposes pathways for achieving the green transformation of agricultural clusters,thereby providing theoretical insights and policy recommendations for developing countries to foster green agricultural clusters and enhance their agricultural sectors'international competitiveness.

红色档案编研的现状和发展路径探析——以华东六省一市为例

红色档案编研工作,就是要用档案讲好党的故事、从红色档案中大力挖掘与时代同频共振的文化基因,用群众喜闻乐见的方式让红色档案中蕴含的红色基因入脑入心。华东六省一市是革命老区,有着独特的红色档案资源优势,文章以线上调查、实地调查以及访谈的形式对六省一市红色档案的编研现状进行了调研,并对调研结果进行汇总和深入分析,从而提出红色档案编研的发展路径。

中国地震预报论坛2024年度学术交流会议在海南海口召开

中国地震学会地震预报专业委员会和海南省地震局于2024年8月13—17日在海南省海口市联合举办了中国地震预报论坛2024年度学术交流大会,来自全国地震行业内、外17所大学(其中包含1所外籍大学)、7个科研院所与23个地震行业直属省市级分支机构共47个单位的130余名代表参加了此次会议。学术交流设置了13个专题;会前征集到论文近96篇,会期交流报告51个,其中口头报告26个,张贴展板25个;26个口头报告中,大会特邀报告7个,外籍专题邀请报告1个;从25个张贴报告中,评选出优秀报告6个,6位作者获得下一届年会的口头报告资格。兼顾会议代表的特殊条件,本次会议设置了1个小时的线上交流时间。大会邀请了3位专家分别针对首座跨越1605年7.5级地震活断层的大跨度桥梁抗震设防技术与海南火山活动监测技术开展相关科技培训;围绕“制约地震三要素的因素与地震三要素预报的瓶颈问题”举办了1.5小时的Panel讨论;组织了为期一天的“跨越1605年海南7.5级地震断裂带的建筑抗震设防技术与海南火山活动监测技术的野外科普培训”。越来越多的行业外专家带来了不同视角的科研成果,丰富的前沿性学术交流提升了对地震过程物理机制的认识,跨越活断层建筑设施的精湛抗震设防技术的现场观摩学习增强了年轻学子对地震科技行业的自豪感。

新时代辽宁省与俄罗斯远东地区开展海洋合作研究

新时代以来,中俄关系达到了历史新高度,两国之间的合作交流也深入到海洋方面。中国辽宁和俄罗斯远东地区是东北亚区域的重要沿海地带,两地区之间开展海洋合作有利于海洋经济发展、东北亚海域安全和海洋生态环境治理。但双方海洋合作也面临着东北亚国际局势不稳定、双方基础设施互联互通水平不高、双方海洋产业有待优化、缺少有效法律制度保障等问题,阻碍了双方海洋合作的进一步发展。因此,辽宁省在与俄罗斯远东开展海洋合作时,应把握好“时”与“势”,加强在港航基础设施建设的合作投资,重视海洋新兴科技的合作研究,构建维护东北亚海域安全的合作机制,同时坚持绿色发展的海洋合作理念,从而为构建海洋命运共同体树立典范。

基于华东区域模式云南短时强降水客观预报技术研究

为提高云南短时强降水的预报效率和预报准确率,使用华东区域模式基础物理量数据,计算云南短时强降水发生前1 h 700 hPa相对湿度、700 hPa比湿、K指数和6 km垂直风切变,对短时强降水的历史个例进行物理量阈值训练和单物理量的敏感性实验,确定物理量阈值。使用阈值判定法,对华东区域模式实时预报数据进行后处理,得到基于小时雨量和物理量的云南本地化短时强降水客观预报产品。研究结果表明:使用阈值判定法研发的基于华东区域模式云南短时强降水客观预报产品能较好地预报云南短时强降水的落区和走向,但是基于小时雨量的短时强降水客观预报产品漏报明显,基于物理量阈值的客观预报产品能有效降低云南短时强降水的漏报率。

GUILLAIN-BARRE SYNDROME IN SIX CITIES AND PROVINCES OF NORTHERN CHINA:IS IT A NEW ENTITY?

Forty cases of Guillain-Barre Syndrome were reported, (GBS) which came from the regions where 'Chinese Paralytic Syndrome' and 'Acute Motor Axonal Neuropathy (AMAN)' were presented before. A study on their clinical, electrophysiological and pathological features was conducted, records on 3 733 GBS cases reported in northern China from 1978 to 1992 were reviewed and compared with cases of 'acute moter axonal nouropathy' . The results showed that the clinical, electrophysiological and pathological features of GBS in north China are similar to those of typical GBS cases in western countries, though there seemed to be some special epidemiological features in age, seasonal and regional distribution. It was concluded that the GBS in northern China is de-myelinating GBS dominantly, not a new entity.

典型收缩城市土地利用多功能时空演变及耦合协调分析——以东北三省为例

以城市收缩最具代表性和典型性的东北三省为例,利用人口统计数据识别出2009—2019年的收缩城市,并运用综合指标评价法和耦合协调度模型探究收缩城市的土地利用多功能水平及其耦合协调度演变特征。结果表明:(1)2009—2019年,东北三省收缩城市土地利用总功能及其子功能整体发展水平较低,总功能和经济功能表现为先增后减的倒“U”型的变化规律,社会功能呈现增长态势,生态功能呈波动下降趋势。(2)收缩城市土地利用多功能存在收缩类型和收缩区域的差异性,具有明显的土地利用多功能收缩效应。(3)收缩城市土地利用多功能的耦合协调度总体呈上升态势,具有相对明显的阶段特征,但整体处于轻度失调,且存在显著的空间差异。

陕西延安地区耐寒竹种栽培试验

陕北地区竹类引种栽培试验是在楼观台国有生态实验林场几十年“南竹北移”成果的基础上进一步向黄土高原延伸栽植的新尝试。采用耐寒性较强的13个竹种,在延安地区进行栽植试验。结果显示,延安地区栽植竹类,冬季防寒保暖措施至少应保持2年以上;在经历冬季-18~-23.8℃的低温后,竹株地上部分各器官不能正常越冬,第2年新笋能够正常出土,出笋时间比正常出笋时间推迟15~20 d,出笋期延长100 d;冬季低温使地下竹鞭尖端冻伤,竹鞭向前延伸缓慢,成林时间较长。试验初步认为,曲秆竹、筠竹、金镶玉竹、黄秆京竹、蓉城竹、早园竹、黄槽竹7个竹种具有较强的抗寒能力,可在延安地区适当环境下推广栽培。各竹种在陕北地区的生长表现仍需进行长时间的监测。

全国—本地尺度下东北三省城市创新网络演化特征与创新能力研究

在网络科学不断发展,创新过程存在跨区域、多尺度、动态性特点的背景下,创新网络及其演化已成为创新经济地理学关注的重点领域。本文将2004-2018年城市间合作专利信息作为原始数据,来表征东北三省城市创新网络,借助Gephi、Ucinet等分析工具,运用复杂网络等研究方法,基于全国—本地尺度分析其格局和结构的演化特征,测度城市创新网络资本,评价城市创新能力,进而对二者关系进行探讨。结果表明:全国—本地尺度下的东北三省城市创新网络的演化特征存在一定的相似性,以“哈长沈大”为网络核心的格局逐渐清晰,网络成长性明显但创新合作的紧密程度和效率均不可观。全国—本地尺度下东北三省城市创新网络演化特征同样存在差异性,全国尺度的网络增速小于本地尺度且存在“小世界”特性,创新资源的跨区域流动不畅通。东北三省城市创新网络资本与城市创新能力水平相关性增强,城市创新能力格局与城市网络地位分布较为一致,城市位于网络的地位以及获取异质性知识与技术的能力更为重要。