Characteristics of seismic reflections in central region of the South China Sea and their geological significance

More than 4 000 km 48-channel seismic reflection data from the central region of the South China Sea have been interpreted. Five seismic interfaces have been distinguished, named T1, T2, T4, T6 and Tg respectively Meanwhile, five seismic sequences numbered I - V have been divided with the ages of Quaternary and Pliocene, Later Mocene, Earlier and Middle Miocene, Oligocene and Pre- Oligocene separately. Sequences I-II overlie all parts of the area. In the continental slope and island slope, Sequences III-V are mainly found in the grabens. Sequence III is found at moot profiles of the deep-sea basin, and Sequnce IV is seen not only at the margins of the east subbasin but also at the margins of the southwest subbasin. Strong reflection from Moho is found at most profiles of the deep-sea basin. The depth of Moho varies between 10 and 12 km, with a thickness of 6- 8 km for the crust. Calculated by age-basement depth correlation formula, the age of basaltic basement in the southwest subbasin is 51-39 Ma. It is indicated that the evolution of the southwest subbasin is simultaneous with or earlier than that of the east subbasin.

ON THE DIFFERENTIATION OF THE ECONOMIC DEVELOPMENT OF CHINA’S NORTH,CENTRAL & SOUTH COASTAL REGIONS

Ⅰ. An analysis of the development trend of the economy in the north,middle aud south coastal regions or China since China began to implementreform and open

Eurasia Continental Bridge——An Important Link of the Coordinated Development between China's Eastern,Central and Western Regions

The new Eurasia Continental Bridgeruns from East China to Central andWest China, crossing 11 provincesand regions, namely Jiangsu, Shandong,Hubei, Anhui, Shaanxi, Gansu, Shanxi,Sichuan, Qinghai, Xinjiang and Ningxia.The total area is 3.6 million sq km and thepopulation is about 300 million, accountingfor a third and a quarter of the whole countryrespectively. The area is very rich in naturalresources, so it is called an "Economic goldbelt" and "Gold corridor". Aerial remote-control survey indicates that along thecontinental bridge from Lianyungang to theAla Mountains within China’s boundary,

Analysis of Externality of Rural Labor Force Flow in Central and Western Regions of China and Benefit Compensation

According to the theories of institutional economics and development economics,the positive and negative externality of rural labor force flowing from central and western regions and into eastern regions of China were analyzed,and then it was proposed that it is necessary to positive externality,rather than take"household register"measures to solve the problem simply.

On Willingness of Rural Land Circulation and Securitization in Central Regions of China

On the basis of questionnaire survey in 54 natural villages of 22 cities( counties) in 6 central region provinces,this paper analyzed the willingness of rural land circulation and securitization and influencing factors with the aid of Logistic model and Multinomial Logit model.The study indicates that factors influencing willingness of rural land circulation and securitization mainly include land contract method,land circulation information and approaches,rights and interests of farmers infringed or not,policies of benefiting farmers,and non-agricultural skills. Finally,it came up with following pertinent policy recommendations:( 1) reforming and improving land contract methods;( 2)strengthening disclosure of land circulation information;( 3) reforming and improving land circulation approaches;( 4) strengthening protection of farmers' rights and interests in the process of land circulation;( 5) reinforcing and implementing policies benefiting farmers;( 6) cultivating and developing farmers' non-agricultural skills.

A Comparative Study of Methods for Delineating Sphere of Urban Influence: A Case Study on Central China

A number of urban and regional plans have been developed with the advancement of urbanization and regional integration, among which the delineation of sphere of urban influence and improvement of integration between the city and its hinterland have be- come vital important for guiding practices. In terms of delineating sphere of urban influence, existing studies have been focused on static study by using single year data or single method, resulting in a lack of time-series longitudinal analysis or comprehensive analysis based on multiple methods This study emphasizes on comparing two methods from both the theoretical and empirical perspective. Both gravity model and improwd field model are applied to the selected study area for measurements and comparison, to explore their strengths and weaknesses. A research framework for comprehensive analysis on delineating sphere of urban influence is proposed. In the end, the differences of deli：aeating methods are illustrated and the feasibility of comprehensive analysis is discussed. Recommendations are provided for selecting appropriate methods for delineating sphere of urban influence or developing regional hierarchy system plans and urban spatial structure schemes.

Diagnostic Analysis on a Regional Rainstorm Weather in North-central Henan Province

[Objective] The research aimed to analyze a regional rainstorm weather process in north-central Henan Province. [Method] Based on the conventional meteorological observation data and the rainfall data of Henan Meteorological Station, the diagnostic analysis of atmospheric thermodynamics and dynamics on a rainstorm weather process in north-central Henan Province on July 19, 2010 was carried out. The characteristics of physical quantity field and the evolution of weather situation in north-central Henan Province when the rainstorm happened were studied. [Result] Western Pacific subtropical high strengthened to extend westward. The dynamic uplifting of low vortex at the middle and low layers, the strong water vapor transportation of southwest low-level jet caused the regional rainstorm weather process in north-central Henan Province. The diagnostic results of physical quantity showed that the deep, thick wet layer and the sustained water vapor convergence provided the abundant water vapor for rainstorm generation. The positive vorticity advection center developed and spread from northwest to southeast, which was favorable for the development of vertical movement. The structure maintenance of positive vorticity at the middle and low layers, negative vorticity at the middle and high levels provided the power condition for the regional rainstorm generation. The pumping effect of convergence at the middle and low layers, divergence at the high layer was favorable for the strengthening of vertical ascending motion at the low layer. The uplifting effect of dew point front at the middle and low layers triggered the release of unstable energy. The confrontation of warm and cold air was one of the important reasons for the regional rainstorm. TBB characteristic analysis showed that TBB was from -60 to -50 ℃ in north-central Henan Province in the whole strong precipitation time, and the moving speed was equivalent to that of southwest vortex. The low-value belt of TBB corresponded with the rainstorm occurrence zone in Henan, and the minimum-value center of TBB was basically consistent with the strongest center of precipitation. [Conclusion] The research provided the scientific basis for the short-term forecast of rainstorm.

Historical experience in the elimination of visceral leishmaniasis in the plain region of Eastern and Central China

Visceral leishmaniasis(VL)(kala-azar)was most seriously prevalent in the plain regions of eight provinces/municipalities in the eastern and central parts of China.In the early 1950s,the number of counties/cities endemic for VL and the number of cases in the plain regions accounted for 60%and 80%,respectively,of the total numbers in the entire country.By implementing comprehensive control measures,including treatment of patients for eliminating the source of infection and spraying insecticide in endemic villages to kill sandflies,VL transmission has been brought under control in this region by the early 1960s,and no new infected cases have been found since 1983,achieving the goal of eliminating VL.

2005-2020年亚洲中部干旱区生态站月潜在蒸散量数据集

潜在蒸散表征大气蒸发能力,是衡量区域蒸发能力的重要指标,也是评价气候干旱程度变化、水资源供需平衡、植被耗水量等的关键参数。在收集中亚生态系统监测网络12个生态站和中国生态系统研究网络(CERN)11个位于西北干旱区生态站的气象观测数据基础上,经过数据质量控制与插补,采用Penman-Monteith模型计算潜在蒸散量,生成了2005-2020年亚洲中部干旱区生态站月潜在蒸散量数据集。本数据集时间序列较长、覆盖多种生态系统类型,可作为亚洲中部干旱问题研究的基础数据、模型输入数据、模拟结果验证数据等,也可为该区域水资源的合理开发与利用、生态环境保护等方面研究提供数据支撑。

中部地区粮食安全产业带建设路径研究

建设国家粮食安全产业带,对提升我国粮食综合生产能力、推动粮食产业高质量发展、建设农业强国具有深远影响。虽然中部地区在粮食生产基础、粮食生产能力、粮食产业链延伸等方面具有优势,但在粮食综合生产能力较弱、粮食产业竞争力不强、区域合作基础相对薄弱、内生发展动力不足等方面存在突出问题,中部地区粮食安全产业带发展要注重如下路径:优化粮食产业布局、加强科技支撑能力、增强基础设施、加强一二三产业融合以及增强区域协同。

以产业链政策为中心扎实推动中部地区崛起

产业链政策是基于产业链现代化目标由其他各种相关经济政策合成的综合性经济政策。实施全方位、系统性、合成式的产业链政策,有利于协调产业政策与区域政策之间的内在冲突,重塑我国国内垂直分工体系,推动中部地区加快发展新质生产力,形成具有竞争力的区域创新产业集群与全球产业链集群。以产业链政策为中心推动中部地区崛起,可以按照“点、线、面、体”四位一体的思路,重点打通在东中西三大地带建设现代化产业链、促进区域间经济循环的堵点与卡点,推动建设区域间产业链的协调机制,兼顾效率与公平,推动建设区域创新产业集群与全球产业链集群。

国家“双区”战略背景下江西对接融入粤港澳大湾区的机遇与对策

党的十八大以来,以习近平同志为核心的党中央对粤港澳大湾区建设提出了一系列新论断、新目标、新要求,明确将粤港澳大湾区建设成为富有活力的国际一流湾区和世界级城市群。这一战略举措对江西赣州对接粤港澳大湾区,加快经济现代化建设、打造全国构建新发展格局重要战略节点具有重要示范作用。粤港澳大湾区建设将畅通对外综合运输通道、辐射带动环泛珠三角、打造国际金融枢纽、加快产业梯度转移、打造国际科技创新中心、打造巨大消费市场,为江西带来新的机遇。同时为赣州带来了产业辐射、金融辐射、科技创新辐射、消费辐射和交通辐射。据此,江西应积极对接融入粤港澳大湾区,加大赣州承接产业转移力度,构建粤赣产业协作示范区;构建粤赣金融合作平台,推动“三南”园区一体化发展;加强科研创新能力,推进粤赣科技创新常态化合作;提升赣州国际陆港能级,加快江西融入“轨道上的大湾区”;打造粤港澳大湾区后花园,加快江西融入“大湾区两小时旅游圈”。

中部欠发达地区实现协调发展要处理好五大关系--兼论加快推进陕南地区高质量发展

我国幅员辽阔、地形复杂、人口众多,各地自然条件、资源禀赋差异较大,区域统筹发展关系重大。受经济、文化、历史和区位等诸多因素影响,不仅中西部地区与东部地区存在差距,中部地区一些省份内部的发展也有梯度差异。陕西作为共建“一带一路”向西开放的前沿地区,其南北差异明显、互补性较弱、区域之间发展不平衡不充分的问题较为突出。陕南地区占陕西总面积的35%以上,而2023年其经济总量在陕西经济总量中的占比却为11.7%,传统产业比重较高,新兴产业、高技术产业和高端服务业发展不足,区域内部经济发展不平衡不协调,创新驱动发展的潜力不足等问题较为突出。面对经济发展中存在的矛盾,欠发达地区要精准把握发展机遇,在充分利用当地丰富的自然生态资源、发挥深厚的历史文化底蕴基础上,科学处理好经济社会发展与生态文化保护、传统优势产业与新兴产业、因地制宜与创新发展、内部协调发展与奋力争先、区域发展定位与融入国家重大战略五大关系,以经济生态化、生态经济化为导向,充分发挥陕南的生态资源禀赋优势,加快发展新质生产力,实现经济发展新突破,高质量推进陕南绿色循环发展,实现全面、协调、可持续的高质量发展。

中部地区绿色崛起的影响因素、突破点与政策建议——基于微观视角的解释

企业的绿色发展是实现绿色崛起的微观基础,也是助力实现人与自然和谐共生的中国式现代化的必然要求。本文将中国工业企业数据库与中国企业污染数据库匹配得到各个地区共609831家企业样本,分析不同地区在高污染行业比例、资源利用效率、污染物产生量以及污染物去除率等指标的差异,从微观视角得出中部地区绿色崛起的障碍在于企业资源消耗量大、各污染物产生量大以及各污染物去除率低。基于“波特假说”,从创新能力这一重要因素切入,考察城市创新能力对企业的影响,认为创新能力的作用目前主要体现在提升了企业的环境治理能力,没有体现在污染预防能力上。若要真正实现企业绿色发展,其关键在于以创新能力提升企业生产效率,即实现“创新补偿”效应。

中国-中东欧国家合作机制2012—2022年区域国别研究回顾与建议

中国-中东欧国家合作机制自2012年建立以来,至2022年已走过10年的发展历程。本文旨在回顾和分析这一时期中国学者围绕中东欧国家所进行的研究,以期为未来的研究提供参考和借鉴。本文采用文献综述法,系统梳理了2012—2022年我国中东欧研究机构与学者、研究成果的产出及学科分布特征等情况。研究发现,中东欧国别与区域研究在数量和质量上均有显著提升,但仍存在一些问题,如通晓该地区的专门人才缺乏,研究方法单一,学科交叉不足等。本研究为中国-中东欧合作提供战略层面的参考,也为中东欧国别区域视域下的学术发展提供参考。

中西部高等教育振兴计划的政策效应评估

“中西部高等教育振兴计划”等政策旨在解决制约中西部高等教育发展的突出问题,然而,目前多数相关研究仍然集中于政策文本的质性分析。研究采用双重差分法(DID)构建计量模型评估了“中西部高等教育振兴计划”的政策效应。研究发现:其一,入选“中西部高校基础能力建设工程”的省属地方高校的科研课题立项数提高了13.40%,科研成果产出提高了14.80%,科研成果获奖提高了28%。其二,随着“中西部省域高水平大学建设”政策的相继实施,中西部省域高等教育的专利授权转让数提高了22.1%,并通过科研成果转化参与到区域社会经济发展中;中西部省域高职称教师规模增量获得了5.50%的纯政策效应,充实了师资队伍的骨干力量,但青年教师却没有得到有效补充。展望未来,中西部高等教育振兴的重心应放在政策的可持续性和省域自足能力的培育上,并为青年教师的成长提供空间。

华中地区农业绿色发展水平及区域差异分析

梳理华中地区农业绿色发展水平的时空演化特征,探究其区域差异,是分析区域农业绿色可持续发展的基础。采用熵值法和耦合协调度模型对华中地区2010—2020年47个地级市的农业绿色发展水平进行测度,分析其时空演化特征,并在此基础上进一步运用变异系数法探究区域差异。在时序变化上,农业绿色发展水平综合评价指数均值从0.233增长为0.376。在空间变化上,农业绿色发展水平处于快速发展和高速发展阶段的地级市数量越来越多,而且各地级市之间存在明显区域差异,具体表现为中北部和西北部地区农业绿色发展水平高于其他地区。2010—2020年华中地区各地级市农业绿色发展耦合协调度值整体呈上升趋势,耦合协调度值在0.100~0.500之间。变异系数从2010年的0.147下降为2020年的0.119,表明华中地区农业绿色发展水平整体区域差异逐渐降低。

原中央苏区县域韧性框架下红色旅游资源空间优化开发研究

选取原中央苏区范围内的闽、赣、粤97个县,从生态韧性、经济韧性、文化韧性、社会韧性4个方面构建了区域可持续发展韧性(RSD)水平评价指标体系,并对研究区内红色旅游资源空间维度上的特征与类别进行分类识别。研究结果如下:①研究区RSD韧性系统水平总体为中低韧性,整体呈现“中部高,四周低”的空间分布特征。②红色旅游资源分布存在明显的集聚性,同时也有小部分处于零星分布的状态,根据其规模和影响力从高到低划分为聚类V~I共5种聚类类型。③红色旅游资源空间分布与RSD韧性水平存在明显关联性,其中经济韧性较低、社会韧性中等,文化韧性和生态韧性较高。④基于全域旅游等规划理念,充分考量县域韧性水平和红色旅游资源的发展现状,规划出“三区、两带、两核心”的红色旅游资源开发空间格局。

经济高质量发展视域下中国-中亚教育合作的现状、作用及优化

中国与中亚五国现代意义上的教育合作始于2005年中亚第一所孔子学院的设立和2007年上海合作组织大学的成立,并在“一带一路”建设时期取得快速发展。截至目前,中国与中亚五国主要在高等教育合作平台、职业教育合作平台、语言与文化交流、留学奖学金体系、中国高校的中亚分校五个方面形成了稳定合作。这些合作通过提升全要素生产率、缩小收入差距、搭建语言文化交流桥梁和改善服务贸易,助力区域经济实现“创新”“共享”和“开放”的高质量发展。针对中国-中亚教育合作中存在的规模小、发展慢、教育与就业脱节等问题,我国应改变重东轻西的合作战略,与中亚五国合力推进学科建设务实合作,并完善外籍人才就业与居留政策,多举并进提升教育合作的规模与质量。

中西部地区混凝土拌合站规模与费用测定研究

混凝土拌合站是铁路项目重要的大型临时工程设施,混凝土拌合站费用的精准确定对保障铁路建设投资合理性有着重要意义。本文突破以往混凝土集中拌合站设计只采用统一指标计列工程费用的模式,综合考虑整体规模以及场地地形等因素引起混凝土拌合站主要工程数量的变化,对中西部地区混凝土拌合站的设计补充制定相应原则,并对其主要工程数量及概算指标进行测定分析,以提高费用计列的精度及准确性。本文的研究成果将为今后中西部地区混凝土拌合站的设计提供参考和依据,也为不同类型的混凝土拌合站费用的计列提供理论支撑。