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 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.

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.

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,

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 become 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 improved 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 delineating 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.

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。

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。

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。

东盟“中心地位”塑造:现状分析和路径探索

东盟“中心地位”塑造的基础主要有两方面。首先,东盟的持续发展及其与邻国建立的合作机制为它提供了一个稳固的基石。其次,域内外大国如中国等的鼓励与支持也是不可或缺的。然而,随着地区形势和国际格局的变化,东盟在塑造“中心地位”上面临内部分歧、机制冗余、大国战略意图转变等挑战。为了维护东盟的“中心地位”,强化中国—东盟关系成为必要的路径。官方路径包括深化经济贸易合作、加强政治和公共事务的沟通与协调,非官方路径则强调多元化的民间交流活动以及非政府组织在其中的作用。

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。

“一带一路”十年:中国新疆与中亚高等教育合作的现状、机遇与路径选择

“一带一路”倡议走过了十年征程,面临“再出发”的任务和挑战。《推进共建“一带一路”教育行动》指出迫切需要加强新疆与中亚高等教育的合作。十年来,新疆与中亚搭建合作平台、签署合作协议为促进新疆与中亚高等教育合作提供了顶层设计,但也存在自身高等教育发展水平落后的劣势。面对国家拓展中亚战略伙伴关系的契机,以及“一带一路”建设中新疆的发展机遇,新疆需要应对欧盟、英、美、俄罗斯等国项目计划占领市场的挑战,以及国内其他省份及高校积极拓展合作项目的竞争挑战,基于国家扶持和政府作为,激发新疆高校在学生交流、教师交流、学术研究、教育培训和项目合作等方面的潜力。

“一带一路”跨域治理视域下中国—中亚跨界民族问题及其应对研究

中国与周边中亚国家间跨界民族问题的存在及其影响是当代“一带一路”沿线国家和地区实现长久安全与持续发展的重要变量因素,关系到“一带一路”跨域治理进程中我国与中亚命运共同体建构和中国—中亚跨域一体化合作的行稳致远。着眼于兹,有必要围绕“一带一路”跨域治理的目标与框架,针对中国—中亚跨界民族问题的理性认识与科学处理展开深入、系统地研究。对此,本文结合理论与现实,沿循“利用理论解构现实”到“建构理论指导现实”的逻辑路径,就“一带一路”跨域治理视域下中国—中亚跨界民族问题及其应对进行探索,分析了中国—中亚跨界民族问题的内涵及其对“一带一路”跨域治理的多重影响;从主权维护、区域安全、民生发展等三个维度探讨了“一带一路”跨域治理语境下应对中国—中亚跨界民族问题的主要旨趣;继而基于“一带一路”建设稳定与合作,由国际合作体系完善、公共产品协同供给、多元机制复合运用等若干面向提出了应对中国—中亚跨界民族问题的实践策略。

2022年中亚形势:地缘震动中的困惑与选择

受俄乌冲突影响,2022年中亚国家形势喜忧参半。中亚各国纷纷进入独立后新一代领导人执政期,各项改革在进行过程中。中亚各国执政当局的控制能力较强,以反腐败和反垄断为抓手,赢得了大多数民众的支持,足以稳住局势,使之不发生大的动荡,但各领域改革效果还需要时间检验。国内经济因新冠肺炎疫情封控限制解除而进入恢复增长期,供应链安全和通胀加重是最大难题。外部的阿富汗威胁依然很大,并有向中亚渗透的表现。在对外关系方面,大国在中亚的博弈趋于活跃。随着俄罗斯陷入乌克兰危机,其对中亚的影响力有所减弱,美西方和周边国家趁机填补力量空缺,使得“C5+1”(中亚+)合作模式备受欢迎,中亚国家虽获得更多关注,却也因此在一定程度上选择难度增加。中国始终与中亚国家保持友好合作关系,双方在总结前期建交30年经验的基础上,约定共建下一个“黄金30年”。

中亚管道气供应安全形势与应对策略

通过分析中亚地区主要天然气资源国土库曼斯坦、哈萨克斯坦和乌兹别克斯坦的资源潜力,以及该地区储产量增长趋势,评价其出口供应能力和天然气供需形势。该地区天然气资源分布不均、资源国供需形势变化造成的气源风险,管道长距离跨境运输及地区安全形势导致的管道运输风险,各类突发事件造成的断供风险,构成目前中国从中亚地区进口管道气面临的主要风险因素。基于中亚地区天然气供应安全的新形势,针对经由中国-中亚天然气管道进口天然气的气源供应,建议:一是跟踪中亚地区勘探开发新动态,积极寻找可接替气源,寻找储产量新的增长点;二是研究主要天然气资源国的能源战略和出口政策,在复杂多变的国际局势下,抓住机遇与中亚资源国在能源领域开展深入合作,保障天然气供应安全;三是拓展与中亚资源国在可再生能源领域的多元化合作,科学合理地利用可再生能源,保障中亚资源国对中国天然气出口的安全性和可持续性。

2017-2021年我国多个省份猪场猪圆环病毒2型流行病学调查

为了研究猪圆环病毒2型(PCV2)在我国部分省份的流行情况,本试验在2017-2021年期间于湖北、河南、湖南、江西、浙江、河北、福建和山东8个省份127个规模化猪场采集了2357份病料样品,使用聚合酶链式反应(PCR)对PCV2进行病原检测,同时对PCV2的单独感染和PCV2与其他病原体的混合感染进行分析,并对华中地区的50株PCV2进行遗传演化分析。结果显示,8个省份的PCV2阳性率介于52.17%~67.78%;不同年份PCV2阳性率介于50.53%~71.85%;共检出PCV2阳性样品1436份,总体阳性率为60.92%;PCV2单独感染率为15.18%,PCV2与猪繁殖与呼吸综合征病毒(PRRSV)的混合感染率为22.08%,PCV2与猪肺炎支原体(MHP)、猪链球菌(SS)的混合感染率为18.31%;遗传演化分析发现,PCV2d亚型占阳性样品数的80%(40/50),PCV2a亚型占4%(2/50),PCV2b亚型占16%(8/50),未发现PCV2c和PCV2e亚型。结果表明,我国华中地区PCV2的感染率较高,且PCV2和PRRSV及PCV2和MHP、SS的混合感染率高于PCV2的单独感染率,同时PCV2d亚型已经成为华中地区当前PCV2流行的优势毒株。

南阳夏饷铺鄂侯家族墓地与两周之际南土和中原的形势

夏饷铺春秋早期鄂侯家族墓地的发掘,不但丰富和更新了很多旧有的认知,同时也提出了一系列新的问题,尤其是对两周之际南土和中原地区的形势和战略格局的重新认识,有重要促进作用。据夏饷铺墓地最新考古发现,可知宣王时期,周人在南阳盆地重建姬姓鄂国,以稳定南土,屏藩中原。与申、息二国的灭亡时间大致相当,鄂国约于公元前680年左右复灭于楚。西周中期以降,南土和中原形势骤变,至西周晚期厉宣时期,周人在中原和南土的统治皆面临严重挑战。宣王时,通过迁申吕、封建宗亲鄂国于南阳盆地,试图在南土地区进行战略性重塑,重建中原和王朝的屏障,修复周初建立的政治地理空间架构。但西周王朝衰落和楚人崛起的大势已不可挽回,春秋中期以后,楚国取代曾国成为南土的霸主,南土尽入楚人彀中,“金道锡行”的战略通道和屏障作用尽失,以曾为代表的周人势力彻底退出江汉流域。

我国中西部高等教育的特征及主要问题——基于商业模式画布理论的分析

随着国家区域协调发展战略的有效实施,中西部高等教育在时代浪潮中砥砺奋进。但中西部高等教育与东部相比,总体水平仍有很大差距。深入审视该行业的商业模式对推动党中央新时代振兴中西部高等教育相关意见精神落实落地,具有重要现实意义。分析中西部高等教育商业模式画布中的客户细分、价值主张、渠道通路、客户关系、核心资源、关键任务、合作伙伴、收入来源和成本等九个要素发现,其商业模式有优化的空间。需注重客户需求,提升高等教育供给与劳动力市场的匹配度,增加低收入人群收入以提高教育付费能力,帮助学生拓宽就业渠道,采取特殊激励措施聚集卓越教师队伍,加强开放合作实现共赢发展,发挥商业模式中的优势,消弭阻碍发展的劣势,激发其内生动力和发展活力。

Legal-Ease China's Central Regions:Developing Foreign Investment Inland

This is the second in a series of articles on this topic, the first of which appears in Issue No. 19 We now look at the cost of land. Here we have contacted the most popular local development zone in each city and taken their quotes for renting

中部六省经济增长方式对区域碳排放的影响——基于Tapio脱钩模型、面板数据的滞后期工具变量法的研究

本文综合运用Tapio脱钩模型、面板协整检验、滞后期工具变量法和碳排放峰值预测,使用1995-2012年的18年长面板数据,研究中部六省经济增长方式对区域碳排放的影响。研究思路是先用Tapio脱钩模型考察中部各省经济增长与碳排放总量、人均碳排放量和碳强度之间的关系,找到中部各省的个体差异和共性,接着检验经济增长与碳排放是否存在长期均衡,在确定两者存在长期均衡的基础上进一步运用省际面板数据和滞后期工具变量具体考察中部六省经济增长中产业结构、能源结构、城镇化水平、对外贸易和技术进步与碳排放总量和碳强度的关系,归纳经济增长方式对区域碳排放的影响,最后根据回归方程和中部六省的基础数据预测碳排放峰值的到来时间。得出中部六省经济增长对于化石能源的依赖程度经历了由弱到强再到弱的过程,经济增长方式经历了一个由集约到粗放再回到相对集约的过程;经济增长与碳排放之间存在协整关系,中部六省人均GDP增长对人均碳排放增长的贡献弹性还很大,即人均GDP每升高1%,碳排放总量会上升1.246 7%;中部六省存在碳排放和碳强度环境库兹涅茨曲线,火力发电对中部六省的碳排放和碳强度产生正的影响,前后两年间火力发电比例每提高1%,中部六省内碳排放量和碳强度将分别提高0.505 1%和0.370 3%,第二、第三产业的发展和技术进步有利于中部六省的碳减排工作,前后两年间的第二产业占GDP比重、第三产业占GDP比重和研发强度代表的技术进步每提高1%,中部六省碳排放量将会分别降低2.286 1%、3.845 3%和48.167 6%,碳强度将会分别下降1.919 4%、3.163 0%、48.996 4%,城镇化和地区开放程度对中部六省的碳排放影响不显著,中部六省经济增长方式对区域碳排放量和碳强度的影响是一致的;目前各省均已越过碳强度峰值,但还远未越过碳排放峰值。在经济"新常态"下,通过强化中部六省碳减排的协同合作和跨区域治理,打造中部碳交易市场和碳金融中心,调整产业结构、促进技术进步,积极发展低碳产业,中部六省很有可能提前在2030年前达到碳排放峰值。