长三角洲一体化战略下合肥现代物流高质量发展研究

长三角洲一体化发展中的空间重构为合肥现代物流高质量发展带来机遇与挑战,从区域物流、城际联动、大交通、大物流与产业融合等视角研究合肥现代物流枢纽优势、科技资源引领、通道局限和成本竞争压力,提出面向超大城市群的合肥现代物流高质量发展体系建设目标、路径与保障机制。研究发现,多式联运中心、多元化通道与科技赋能是合肥现代物流高质量发展的重要路径;集成化、数字化和平台化是合肥现代物流高质量发展体系的建设目标;政策联动、服务创新与开放性环境是保障合肥现代物流融合长三角洲一体化高质量发展的重要支点。

缓解长三角洲地区高技能人才短缺的对策研究

本文通过对长三角洲上海、宁波、无锡三个地区缓解高技能人才短缺方面所做的措施的比较研究,得出从倡导正确的高技能人才价值导向、为高技能人才培养搭建平台、提高高技能人才的收入分配等各种福利政策、促进学校与企业合作共同培养高技能人才、促进高技能人才合理有序流动和证书互认平台建设等五个对策来缓解长三角洲地区高技能人才短缺问题,为培养高技能人才找到了有效途径。

基于因子分析的城市综合力——以宁波与长三角洲主要城市为例

城市综合竞争力,是近几年国外兴起的城市管理新课题,宁波作为中国最大的经济圈——长江三角洲地区的第二大中心城市,在近几年的发展中受到来自国内同类城市,特别是长江三角洲地区周边25个城市的竞争压力,并对其微观层面和宏观层面,采用因子分析法和聚类分析法进行比较,从比较中找出宁波的优势与不足,提出合理建议和意见,便于今后的发展发挥优势,并针对不足,采取具体措施,加快宁波发展,提高城市综合竞争力。

吴文化与长江三角洲区域文化的整合

长江三角洲地区之所以有今天的成就,其原因是多方面的,其中,历史文化的积淀及其对经济社会发展的积极推动作用是十分明显的。因此,深入研究该地区的历史文化,既是区域文化研究的需要,也可以通过相关研究总结各地区的历史经验,为今天的社会发展提供借鉴。长三角洲是一个多元文化共存的地区,其中吴文化是代表性文化之一。本文从历史上吴文化在长三角洲地区的几次整合入手,论述了吴文化与长三角洲区域文化发展的紧密关系及发展趋势。

长江三角洲白山羊保种群体的SSR遗传多样性分析

长江三角洲白山羊是皮、肉、毛兼优的地方山羊品种。通过微卫星标记(SSR)对长江三角洲白山羊保种群体进行遗传多样性分析,可为种质资源保护和品种改良提供数据支持。选取30个SSR标记,采用PCR扩增和毛细管电泳技术检测海门山羊、崇明白山羊和崇明地区杂交白山羊的遗传多样性。对各群体不同位点和各位点不同基因型进行分析。海门山羊、崇明白山羊和崇明地区杂交山羊群体中等位基因总数分别为205、191和147个,平均有效等位基因数(Ne)为4.012、3.812、3.092,平均期望杂合度(He)为0.683、0.668、0.617,平均观测杂合度(Ho)为0.726、0.691、0.633,平均多态信息含量(PIC)为0.647、0.630、0.567。三个群体的平均近交系数(Fis)为0.0110,平均遗传分化系数(Fst)为0.0507,平均基因流(Nm)为4.6806。杂交山羊和崇明白山羊的遗传距离较近,和海门山羊遗传距离较远。系统进化树聚类分析表明,崇明白山羊与崇明杂交山羊聚为一类。两个纯种长江三角洲白山羊群体和杂交群体均表现出较高的杂合度、多态性和遗传变异;两个保种群体为中度遗传分化,近亲繁殖率低,存在基因交流,可用于种质资源的保存和利用。

长江北三角洲抗倭碑文的史料意义

长江北三角平原上所遗存的二十余种记及明代倭患和抗倭战争的古代的碑石文献 ,在数量上据全国各抗倭战区所存的同类文献之首。在内容上 ,对补充旧史的阙失、订正传误、佐证史实、深化研究也有诸多帮助 。

志丹地区长82砂层组缓坡浅水三角洲前缘砂体发育模式及成因

浅水三角洲前缘地区的油气成藏条件优越,其内部砂体历来是常规油气勘探的重点目标,弄清其沉积规律与沉积模式,是勘探取得成功的关键。利用鄂尔多斯盆地志丹地区长82砂层组岩心、薄片、测井和录井资料等,对该区长82砂体的岩石学特征、矿物学特征、测井响应特征、空间展布规律及成因类型进行研究,在考虑沉积期湖盆古地貌、古水深、古气候等的基础上,建立了缓坡浅水三角洲前缘砂体的沉积模式,并分析了其成因。研究表明:志丹地区发育2类沉积特征明显不同的浅水三角洲前缘砂体,分别是水下分支河道砂体和河口坝-滩坝复合砂体;2类砂体的岩石类型均以细粒长石砂岩和岩屑长石砂岩为主,其中水下分支河道砂体单层厚度大、砂质成熟度低,垂向上多期砂体连续叠置,平面上连片性差,而河口坝—滩坝复合砂体单层厚度小、砂质成熟度较高,频繁地夹泥—粉砂薄层,平面上连片性好;志丹地区处于湖盆的浅水缓坡上,区内砂体发育的类型与湖平面高低密切相关,水下分支河道砂体沉积主要受控于低湖平面时期的河流进积作用,而河口坝—滩坝复合砂体则主要与高湖平面期湖浪作用有关。该研究成果可为湖相缓坡浅水三角洲前缘砂体体系的研究提供借鉴。

长三角体育产业空间格局演变特征及优化策略

基于2000~2021年长三角体育企业数据,采用地理集中度指数、核密度估计、丰度系数和空间自相关等空间分析方法,分析长三角市域尺度的体育产业的空间格局演变特征,并针对性地提出优化布局发展策略。研究发现:1)地理集中度指数取值范围显示整体上长三角体育产业呈现出较为分散的分布状态,“两主核四次核多带多点”的核密度格局正在形成。2)长三角地区的H-H集聚地区数量增多且集中在长三角的东部地区,L-L型数量减少且集中在长三角的西北部地区。3)通过统筹规划,精准施策,营造长三角体育产业协同一体化发展。实事求是、因地制宜,塑造长三角体育产业品牌特色化发展;举偏补弊、增补数量,建造长三角体育产业格局均衡化发展;精益求精、注重质量,打造长三角体育产业卓越优质化发展;日臻完善、优化分类,创造长三角体育产业多元持续化发展。

长江三角洲地区城镇空间扩展特征及机制

城镇空间扩展是城市化作用于地理空间的直接结果,揭示城镇空间扩展过程、格局及机制已成为识别城镇发展阶段、认知城镇发展规律的有效手段。基于长江三角洲地区多时相卫星遥感影像数据,以城镇用地扩展空间分异与关联特征为切入点,利用间隙度指数、分形维数、扩展强度指数、扩展速度指数和空间关联模型,定量揭示了区域城镇空间扩展特征的多样性、空间组织异质性和"热点区"格局演化。结果表明:20世纪80年代以来,长三角洲地区城镇空间扩展在以中心城市集聚为主导的过程中,遵循"小集聚,大分散"的特点,围绕"Z"形区域发展轴线,大致经历了点轴扩展、沾粘式增长和蔓延扩张的过程,区域融合现象凸显;空间扩展的"热点区"格局不断演化,"热点区"的核心集聚作用在减弱,沪宁沿线、沪杭沿线、杭甬沿线和沿江地区成为驱动长三角城镇社会经济发展的核心区;同时,在城镇空间扩展的不同阶段,驱动机制有所差异,经济全球化和区域城市化推动着长三角城镇空间一体化进程。

中外城市圈一体化交通运输体系发展探析

城市圈一体化交通运输体系,是提高现代化城市圈交通运输体系的总体效益和服务水平的最佳选择。对东京城市圈、纽约城市圈和长三角洲城市圈一体化交通运输体系的形成、布局、结构和特点进行了比较分析。结果表明:一体化化通运输体系是城市圈交通运输发展的理想方式,其发展需要紧扣城市圈的结构、布局和功能,并通过系统的规划和一体化的管理来实现。

Characteristics and Transformation of Heavy Metal Pollution in Soil and Rice of Yangtze River Delta Region

[Objective]Characteristics of heavy metal pollution in soil and rice of Yangtze River Delta Region were studied.[Method]Heavy metal contents of more than 150 samples in Yangtze River Delta region were determined so as to make the soil environmental quality assessment and study the content distribution,transformation and distribution characteristics of heavy metals in different regions and different plant parts.[Result]The Yangtze River Delta region was polluted by Cd,Pb,Cr,Cu and Zn,among them Cd pollution was the most serious;Pb,Cu and Zn took second place;Cr appears the lightest;And there was almost no Hg and As pollution in this area.The Nemero pollution index of soil was 0.880 which was at the alert level.Cd,Cr,Cu,Hg and Zn in rice grains exceeded the background values.Heavy metal pollutions in soils divided by regions were in order of Taihu Lake region 〉Zhejiang region〉 Yangtze River region and urban areas 〉towns and rural areas.Heavy metal pollutions in soil divided by the uptake level were in order of rhizosphere soil 〉rice straw 〉rice grain.Transformation coefficients were in order of Cd〉 Cu 〉Zn〉 As 〉Hg〉 Pb〉 Cr.Distribution coefficients were in order of Zn〉 Cr〉 Cd 〉Cu〉 Hg 〉Pb 〉As.[Conclusion]There were larger value ranges of contaminated elements in the Yangtze River Delta Region,moreover individual samples had serious pollution,so the prevention and control of heavy metal pollution should be strengthened.

全球化空间重组与中国长三角城市“呼应构想”

江苏南部昆山的案例研究显示:在经济全球化时代,中国的长三角地区正创造一个崭新的全球化空间。文章延用城市"呼应构想"概念,来具体解释地方的这种发展驱动策略和政策,包括经济上的重组和政治/行政上的重构。在与临近城市上海的并行发展中,昆山是如何通过"机会袭夺"以改变国内外投资的策略取向,进而超越这些大城市中心以完善并扩展自己的经济联系。这一调查结果显示地方政府在决定城市和区域发展中仍然扮演了具有举无轻重的角色,这不仅应对了全球化进程,更是加速了长三角地区的全球化作用和联系。

Characteristics and Process of Land Use Changes in the Yangtze River Delta, China

As one of the developing countries China has an arable land per capita far below the world’s average level. With a high-density population and the quick development of economy and urbanization, the Yangtze River Delta shows the typical characteristics of land use in developed regions of China, which are: high land reclamation rate and low arable land per capita; intensive land use and high output value; and rapid increasing of construction land area and fast diminishing of arable lands. The analysis indicates that the process of the arable land changes in the Yangtze River Delta could be divided into four different change stages over the past 50 years.

The relation between distribution of zooplankton and salinity in the Changjiang Estuary

Seasonal netzplankton samples from stations in the Changjiang (Yangtze River) Estuary were collected from May, 2004 to February, 2005. The dominant species and their contribution to the total zooplankton abundance were determined. Moreover, the relationship between the salinity and abundance was studied with stepwise linear regression. During the whole year, the salinity was positively correlated with the abundance, while the temperature, negatively. Linear regression analysis showed also a high positive correlation with salinity for total abundance in August and November, while in February and May, no obvious relations were found. The most abundant community was composed of neritic and brackish-water species. The North Passage (NP) (salinity <5) was greatly diluted by freshwater while the North Branch (NB) was brackish water with salinity range of 12–28. Consequently, clear decline in abundance of zooplankton was along the estuarine haloclines from the maximum in the area of high salinity to the minimum in the limnetic zone. Total zooplankton abundance and biomass were lower in NP than the NB in all seasons. In short, the salinity influenced the abundance of each species of zooplankton, and ultimately determined the total abundance of zooplankton. Furthermore, a winter peak in the abundance existed, which might be caused by the flourishing of Sinocalanus sinensis, a widely distributed species in the Changjiang Estuary.

Pollen and Phytolith Analyses of Ancient Paddy Fields at Chuodun Site, the Yangtze River Delta

A number of paddy fields pertaining to the Majiabang Cultures (5500-3800 years BC) were discovered during the archaeological excavations that were carried out since 1998 at the Chuodun site in the Yangtze River Delta. The pollen and phytolith analyses of two soil profiles from the northeastern part of this site were carried out to trace the agricultural practices of the Neolithic period. The phytolith results showed that rice domestication in the Yangtze River Delta could be traced back to as early as the Majiabang Culture. The pollen assemblage also revealed low levels of aquatic species, similar to that in modern paddy fields. This finding suggested that humans might have removed weeds for rice cultivation during the Neolithic period. Thus, pollen analysis in association with phytolith analysis was a promising method for identifying ancient paddy fields.

Impact of and adaptation strategies for sea-level rise on Yangtze River Delta

The Yangtze River Delta characterized by a dense population and a rapidly developing economy is highly vulnerable to sea-level rise. The data from the China Oceanic Information Network and the Zhejiang Provincial Hydrology Bureau are used to analyze sea-level rise. The rate of sea-level rise in the delta was 2.4 mm per year in 1981-2015. The annual sea-level at Daishan, Dinghai, and Dongtou stations in the south wing of the delta were 4.3, 3.1, and 5 mm per year respectively over the same period. The 10-year averaged results at each station also indicate a perceptible trend of sea-level rise. Sea-level rise is contributed to a larger proportion of intensified erosion, ranging from 3% to 14% in the delta. Meanwhile, the 100-year return period of tidal level has decreased to the 50-year rank at Dongtou and Dinghai stations. Moreover, the arrival time of tidal bores at Yanguan is 4 min earlier under sea-level rise of 0.145 m than that of 0 m. The height of tidal bores and the velocities at the surface and bottom layers have an increase under sea-level rise. The maximum increases of high and low tide levels are 0.122 m and 0.016 m while the maximum increases of the velocities at the surface and bottom layers are 0.07 m s^- 1 and 0.05 m s ^-1, respectively. Sea-level rise will bring about the damage of seawall, thus the design standard of constructing seawalls should adopt a higher level to minimize the associated risks in the Yangtze River Delta and its south wing.

Potential control of climatic changes on flood events in the Yangtze Delta during1100-2002

Wide collection on the historic records of the climatic changes and flood events is performed in the Yangtze Delta. Man-Kendall (MK) method is applied to explore the changing trends of the time series of the flood discharge and the maximum high summer temperature. The research results indicate that the flood magnitudes increased during the transition from the medieval warm interval into the early Little Ice Age. Fluctuating climate changes of the Little Ice Age characterized by arid climate events followed by the humid and cold climate conditions give rise to the frequent flood hazards. Low-lying terrain made the study region prone to the flood hazards, storm tide and typhoon. MK analysis reveals that the jumping point of the time series of the flood discharge changes occurred in the mid-1960s, that of the maximum summer temperature changes in the mid-1990s, and the exact jump point in 1993. The flood discharge changes are on negative trend before the 1990s, they are on positive tendency after the 1990s; the maximum high summer temperature changes are on negative trend before the 1990s and on positive tendency after the 1990s. These results indicate that the trend of flood discharge matches that of the maximum high summer temperature in the Yangtze Delta. The occurrence probability of the maximum high summer temperature will be increasing under the climatic warming scenario and which will in turn increase the occurrence probability of the flood events. More active solar action epochs and the higher sea surface temperature index (SST index) of the south Pacific Ocean area lying between 4 o N-4 o S and 150 o W-90 o W correspond to increased annual precipitation, flood discharge and occurrence frequency of floods in the Yangtze Delta. This is partly because the intensified solar activities and the higher SST index give rise to accelerated hydrological circulation from ocean surface to the continent, resulting in increased precipitation on the continent.

Contamination of PAHs in Sludge Samples from the Yangtze River Delta Area

To ascertain the contaminated conditions of polycyclic aromatic hydrocarbons （PAHs） in sludge and to evaluate the risk of application of this sludge for agricultural purposes, 44 sludge samples obtained from 15 cities in the Yangtze River Delta area of China were investigated using capillary gas chromatography/mass spectrometry （GC/MS） after ultrasonic extraction and silica gel cleanup. PAHs＇ contents ranged from 0.0167 to 15.4860 mg kg^-1 （dry weight, DW） and averaged 1.376 mg kg^-1, with most samples containing 〈 1.5 mg kg^-1. Pyrene （PY）, fluoranthene （FL）, benzo[b]fluoranthene （BbF）, indeno[1,2,3-cd]pyrene （IND）, benzo[a]pyrene （B[a]P）, and benzo[g,h,i]perylene （BghiP） were the most dominant compounds, ranging from 0.1582 to 0.2518 mg kg^-1. Single PAH, such as naphthalene （NAP, 2-benzene rings）, phenanthrene （PA, 3-benzene rings）, PY （4-benzene rings）, and FL （3-benzene rings）, had high detection rates （76.1%-93.5%）. The distribution patterns of PAHs were found to vary with the sludge samples; however, the patterns showed that a few compounds with 2- and 3-benzene rings were commonly found in the samples, whereas those with 4-, 5-, and 6-benzene rings were usually less commonly found. All the 44 sludge samples were within the B[a]P concentration limit for sludge applied to agricultural land in China （〈 3.0 rag kg^-1）. The probable sources of PAH contamination in the sludge samples were petroleum, petroleum products, and combustion of liquid and solid fuel. The concentrations and distributions of the 16 PAHs in sludge were related to sludge type, source, and treatment technology, together with the physicochemical properties.

Articulating China's Science and Technology:Knowledge Collaboration Networks Within and Beyond the Yangtze River Delta Megalopolis in China

In this paper, we reconsider the defining but often overlooked ‘hinge' function of megalopolises by analyzing how megalopolises have articulated national and international urban systems in the context of a globalizing knowledge economy. Taking the case of China's Yangtze River Delta(YRD) region, we particularly focus on knowledge circulation within and beyond the YRD region by analyzing the pattern and process of knowledge collaboration at different geographical scales during the 2004–2014 period. Results show that the structure of scientific knowledge collaboration as reflected by co-publications has been strongest at the national scale whereas that of technological knowledge collaboration as measured by co-patents has been strongest at the global scale. Despite this difference, the structure of both scientific and technological knowledge collaboration has been functionally polycentric at the megalopolitan scale but become less so at the national and global scales. The ‘globally connected but locally disconnected' pattern of Shanghai's external knowledge collaboration suggests that the gateway role of the YRD megalopolis in promoting knowledge collaboration at different geographical scales will take time before it is fully realized.

Tracing the provenance of aeolian loess in the Yangtze River Delta through zircon U–Pb age and geochemical investigations

Given the conflicts over the proposed formation mechanisms of Xiashu loess, the question of the provenance of sediments comprising the Xiashu loess in the Yangtze River Delta has not been satisfactorily resolved. In this study, the provenance of aeolian sediments of the Yangtze River Delta, China was examined by applying the detrial zircon U–Pb dating technique, Sr–Nd isotopic and trace element compositional analysis. U-Pb dating analysis was conducted on the Xiashu loess at three locations over the Yangtze River Delta, including Huangnishan(HNS) hill, Shengshan(SS) island and the Xuancheng(XC) area. The Xiashu loess and the sediments of the Yangtze River Valley share considerable similarity in their zircon U-Pb age spectra with the same main age peak and comparable age distribution. By contrast, significant differences in the age spectra, existbetween the Xiashu loess and loess deposits of Chinese Loess Plateau(CLP). Coarse grains of the Yangtze River Delta loess may have a proximal material source identical to the sediments from the Yangtze River valley. Sr–Nd isotopic values of the Xiashu loess match those from the northern margin of the Tibetan Plateau. Rare earth element ratios independent of grain size illustrate that the values from loess of the Yangtze River Delta mostly overlap with those of CLP loess. This feature implies that loess from the Yangtze River Delta has a dominant source of distant material similar as the CLP loess. As such, we conclude that multi-proxy analysis of sediments can shed new light on tracing the provenance of aeolian loess in the Yangtze River Delta.