Spatial pattern of urban-rural integration in China and the impact of geography

Urban-rural integration (URI) is a global challenge that is highly related to inequalities, poverty, economic growth, and other Sustainable Development Goals (SDGs). Existing research has evaluated the extent of URI and explored its influencing factors, but urban-rural linkages are seldom incorporated in evaluation systems, and geographical factors are rarely recognized as the influencing factors. We construct a URI framework including regional economy, rural development, urban-rural linkage, and urban-rural gap. Based on a dataset consisting of 1,669 counties in China in 2020, we reveal the spatial pattern of URI and find a high correlation between the spatial pattern of URI and the relief degree of land surface (RDLS). Using structural equation modeling, we discover that topography has direct ( − 0.18, p < 0.001) and indirect ( − 0.17, p < 0.001) effects on URI. The indirect negative effects are mediated through the infrastructure, and the combination of localized advantages and modern technical conditions could mitigate the negative impact of topography. Finally, we identify 742 counties as lagging regions in URI, which can be clustered into eight types. Our findings could facilitate policy designing for those countries striving for integrated and sustainable development of urban and rural areas.

Optimization of integrated geological-engineering design of volume fracturing with fan-shaped well pattern

According to the variable toe-to-heel well spacing, combined with the dislocation theory, discrete lattice method, and finite-element-method(FEM) based fluid-solid coupling, an integrated geological-engineering method of volume fracturing for fan-shaped well pattern is proposed considering the geomechanical modeling, induced stress calculation, hydraulic fracturing simulation, and post-frac productivity evaluation. Besides, we propose the differential fracturing design for the conventional productivity-area and the potential production area for fan-shaped horizontal wells. After the fracturing of the conventional production area for H1 fan-shaped well platform, the research shows that the maximum reduction of the horizontal principal stress difference in the potential productivity-area is 0.2 MPa, which cannot cause the stress reversal, but this reduction is still conducive to the lateral propagation of hydraulic fractures. According to the optimized fracturing design, in zone-Ⅰ of the potential production area, only Well 2 is fractured, with a cluster spacing of 30 m and an injection rate of 12 m^(3)/min per stage;in zone-Ⅱ, Well 2 is fractured before Well 3, with a cluster spacing of 30 m and an injection rate of 12 m^(3)/min per stage. The swept area of the pore pressure drop in the potential production area is small, showing that the reservoir is not well developed. The hydraulic fracturing in the toe area can be improved by, for example, properly densifying the fractures and adjusting the fracture distribution, in order to enhance the swept volume and increase the reservoir utilization.

Integrative Self-Organizing Map—A Mean Pattern Model

We propose an integrative self-organizing map (iSOM) for exploring differential expression patterns across multiple microarray experiments. The algorithm is based on the assumption that observed differential expressions are random samples of a mean pattern model which is unknowna priori. The learning mechanism of iSOM is similar to the conventional SOM. The mean pattern model which underlies the proposed iSOM models mean differential expressions using a one-dimension of mean differential expressions for the mean differential expressions. The feature map of an iSOM model can be used to reveal correlation between multiple medically/biologically related disease types or multiple platform experiments for one disease. We illustrate applications of iSOM using simulated data and real data.

Characterization of transgene integration pattern in F4 hGH-transgenic common carp (Cyprinus carpio L.)

The integration pattern and adjacent host sequences of the inserted pMThGH-transgene in the F4 hGH-transgeniccommon carp were extensively studied. Here we show that each F4 transgenic fish contained about 200 copies of thepMThGH-transgene and the transgenes were integrated into the host genome generally with concatemers in a head-to-tail arrangement at 4-5 insertion sites. By using a method of plasmid rescue, four hundred copies of transgenes fromtwo individuals of F4 transgenic fish, A and B, were recovered and clarified into 6 classes. All classes of recoveredtransgenes contained either complete or partial pMThGH sequences. The class I, which comprised 83% and 84.5%respectively of the recovered transgene copies from fish A and B, had maintained the original configuration, indicatingthat most transgenes were faithfully inherited during the four generations of reproduction. The other five classes weredifferent from the original configuration in both molecular weight and restriction map, indicating that a few transgeneshad undergone mutation, rearrangement or deletion during integration and germline transmission. In the five types ofaberrant transgenes, three flanking sequences of the host genome were analyzed. These sequences were common carpβ-actin gene, common carp DNA sequences homologous to mouse phosphoglycerate kinase-1 and human epidermalkeratin 14, respectively.

VQT:value cardinality and query pattern based R-schema to XML schema translation with implicit referential integrity

In this paper,we propose a new relational schema (R-schema) to XML schema translation algorithm, VQT, which analyzes the value cardinality and user query patterns and extracts the implicit referential integrities by using the cardinality property of foreign key constraints between columns and the equi-join characteristic in user queries. The VQT algorithm can apply the extracted implied referential integrity relation information to the R-schema and create an XML schema as the final result. Therefore, the VQT algorithm prevents the R-schema from being incorrectly converted into the XML schema, and it richly and powerfully represents all the information in the R-schema by creating an XML schema as the translation result on behalf of the XML DTD.

Analysis of Landscape Patterns in the Urban-Rural Integrated Area Based on Moving Window: A Case Study of Sanshui District in Foshan City

The urban-rural integrated area in Sanshui District of Foshan City was selected for research, and the impact of landscape pattern around the No.269 provincial highway was analyzed based on the land-use data in 2014 using the spatial analysis in GIS and the moving window method. The results showed that:(1) within the scope of a 2 km-range buffer zone, with a low degree of heterogeneity, land for construction use and water area were the dominant land-use types, while with a high degree of fragmentation, cultivated land, wooded land, grassland, garden land, land for other farm uses, and land unused were scattered;(2) the 250-m square moving window could well detect the change characteristics of landscape pattern on both sides of the road;(3) the gradient analysis of landscape pattern in urban-rural integrated area, which was conducted with the aid of a 750-m transect on both sides of the road, indicated that there were significant differences between landscape indexes both in the urban-rural integrated area and on both sides of the road;(4) the road that had an obvious cutting and fragmentation impact on the landscape was an important factor leading to the increasing fragmentation and heterogeneity to regional landscapes.

Pattern of Opening Up,Integration and Reshaping Economic Geography——A New Economic Geography Analysis of the Belt and Road Initiative and the Yangtze River Economic Belt

Since the 18 th National Congress of the Communist Party of China,the central government has implemented several regional development plans,including the Belt and Road Initiative and the Yangtze River Economic Belt,aiming to reshape the economic geography of China.This paper is based on the Belt and Road Initiative and the Yangtze River Economic Belt and outlines the pattern of opening up.To analyze the impact of the pattern of opening up on the regional integration of China's economic geography,this paper has developed a new economic geography model comprised of four regions and two countries.From this,it draws some conclusions.First,the change of pattern of opening up will lead to shifting centripetal and centrifugal forces from the international market.The greater the scale of neighboring markets,the stronger the agglomeration force will be; the more product varieties made in neighboring countries,the more potent its dispersion force.Second,developing an inland international trade corridor will decentralize industry distribution and reduce the impact of external market integration on home countries.Third,the inland international trade corridor could alter the effect of domestic market integration on the economic geography.When domestic integration occurs prior to international integration,further integration of a domestic market leads to greater industrial distribution along a bell-shaped curve,which describes economic activities from dispersion to agglomeration to decentralization.Therefore,developing an integrated market system of major countries and opening a corridor between China and Europe is not only the key to reshaping China's economic geography but also the path to solving the problems of the Heihe-Tengchong Line.

Analysis on Development Trend of the D omestic Interior Design Pattern based on the Regional Characteristics and Cultural Integration

Interior is the main space of human activities, which is an important part of human life and design activities, and is the link between spiritual civilization and material civilization. Interior design originates from life, and needs to solve the problem of the material world and spiritual world. People improve the living environment and life quality through interior designs. The style of design depends on the geographical features and various cultures, which refi ects the artistic features and personality. The development history of modern architecture and interior design shows that the style of interior design is an important part of the whole architectural style, which reffects the design features of the whole building. Therefore, interior design and outdoor design should be in harmony. The orientation and characteristics of interior design determine the necessity of the style reforms. The future development trend of interior development may have the following characteristics humanism, green design, nationalization, intelligence and regionalization.

A Substrate Integrated Waveguide Based Filtenna for X and Ku Band Application

In this paper Substrate Integrated Waveguide-basedfiltenna operating at Ku band is proposed.The model is designed on a low loss dielectric substrate having a thickness of 0.508 mm and comprises of shorting vias along two edges of the substrate walls.To realize a bandpassfilter,secondary shorting vias are placed close to primary shorting vias.The dimension and position of the vias are carefully analyzed for Ku band frequencies.The model is fabricated on Roger RT/duroid 5880 and the performance characteristics are measured.The proposed model achieves significant impedance characteristics with wider bandwidth in the Ku band.The model also achieves a maximum gain of 7.46 dBi in the operating band thus making it suitable for Ku-band applications.Substrate Integrated Waveguide(SIW)Structures possess most of the advantages over conventional radiofrequency waveguides since they have high power management capacity with self-consistent electrical shielding.The most noteworthy advantage of SIW,it can able to integrate all the components on the same substrate,both passive and active components.

庐陵文化遗产与吉安市乡村旅游 地理格局的互动与融合研究

国家提出的“十四五”旅游业发展规划明确了文化与旅游的深度融合,在此背景下,探讨庐陵文化遗产与吉安市乡村旅游之间的互动关系顺应了这一主旨。庐陵文化是中国重要的文化遗产之一,其历史背景和地理价值备受瞩目。庐陵文化遗产对乡村旅游具有重要吸引力,古建筑、传统工艺和民俗风情是庐陵文化的独特魅力。吉安市乡村旅游地理格局的发展,将庐陵文化遗产与乡村旅游相结合,推动了地区经济和社会发展。本文从庐陵文化遗产与吉安市乡村旅游的地理格局入手进行分析,探讨庐陵文化与乡村旅游的互动关系,以及如何保护和利用庐陵文化遗产,从而促进庐陵地区及吉安市的经济和社会发展。

基于高素质技术技能人才培养的专创融合模式构建研究

高等职业教育为国家培养高素质技术技能人才,服务国家教育强国、科技强国和人才强国建设。高职院校在培养人才的过程中要重视学生创新创业能力培养和专业发展之间的融汇贯通,要从课程体系、课程教学、师资队伍和实践平台四个方面打造专创融合路径。高职院校专创融合模式构建能够促进人才培养质量的提升,加强人才和社会需求的契合度,推动国家创新驱动发展战略实施,服务经济社会发展。

智能化测绘背景下测绘工程专业本硕博一体化人才培养模式的探索与实践

智能化测绘背景下的测绘工程专业承担着对接国家战略需要、加速学科转型升级、培养行业拔尖创新人才的重要任务。面对当前测绘类人才培养内容重复、周期较长的问题,本文以中国矿业大学测绘工程专业本硕博一体化培养模式为例,从构建一体化的课程体系、一体化的培养机制、一体化的实践创新平台和一体化的学生支持体系4个方面,深入探讨了如何培养具有国际视野、公益精神、创新意识、实践能力的智能化测绘拔尖创新人才。

“卡脖子”农业技术的创新资源配置模式研究

有效的资源配置模式对于中国推动“卡脖子”农业技术创新,带动农业兴旺、农村繁荣、农民富裕,进而助力第二个百年奋斗目标实现意义重大。首先,界定“卡脖子”农业技术的涵义及特征。其次,从资源配置主体、创新资源支撑以及资源配置机制等方面分析我国现有农业技术创新资源配置模式存在的局限性,认为现有模式不能满足“卡脖子”农业技术创新的资源需求。再次,依据融合理念设计“卡脖子”农业技术创新资源配置的“点兵点将”模式,分析其在资源配置主体、创新资源支撑以及资源配置机制等方面的优势。最后,探讨运行该模式实现各个核心维度之间界面融合,即实现政府—“将”融合、跨学科—主体融合、跨学科—技术创新价值链融合、跨技术创新价值链—主体融合等不同界面融合的保障机制。

双循环发展格局下广东省制造业和物流业融合发展研究

广东省制造业、物流业均处于转型升级、结构调整的重要阶段。推动制造业和物流业两业融合发展是构建新时代“双循环”新发展格局的重要举措,促进广东省制造业、物流业高质量发展的基本途径。针对当前两业融合发展存在的主要问题,广东省须建立面向支柱性制造产业的专业化物流基地、大力推动制造企业物流业务社会化和不断提高物流企业综合服务能力来推动制造业与物流业双向融合发展,以此促进区域产业升级、转移集聚和产业协调高质量发展。

推进企业内外贸一体化经营的思考

内外贸一体化经营对于扩大国内外需求、促进经济增长和高质量发展有至关重要作用。为研究内外贸一体化融合发展中存在的问题和对应措施,分析了内外贸一体化的内涵和必要性以及当前政策与实施成果及企业内外贸一体化过程中存在的挑战,提出了具体的政策引导思路和实施路径。通过财政支持、税收优惠、金融服务等多维度的政策措施,旨在促进企业内外贸一体化发展,以应对全球化挑战,提高国际竞争力。此外,还强调了政策融合、机构合作与标准统一对于推进内外贸一体化的重要性。

促进各民族交往交流交融有形有感有效——读《图案与仪式:融合发展中的云南多民族文化》

时空意识是各民族文化和精神的基本符号,要理解一个民族的文化,首先要从时空观念入手;而一个民族的时空观念往往与其民族的图案或各种仪式展演有关。《图案与仪式:融合发展中的云南多民族文化》正是从云南各少数民族的时空意识入手,通过自己的“看”与“听”精心绘制了各民族共同筑就的“七彩云南”的空间之美。

湖南省城乡融合发展的时空格局与响应过程

城乡融合发展是城乡关系的高级形态和必然趋势,探究湖南省城乡融合发展的基本规律,对协调全省城乡关系、助推乡村振兴、实现高质量发展具有重要意义。采用主成分分析、聚类分析和地理信息系统(GIS)方法,探讨基于全省14个市州的城乡融合发展时空演变格局及响应模式。结明表明:全省各市州城乡融合发展水平普遍较低,其中城乡经济融合与城乡社会融合发展水平是城乡差距扩大的主要原因;全省不同地区城乡融合发展水平表现出一定的空间集聚性,可将湖南省内各市州城乡融合发展水平由高到低依次分为4类,Ⅰ类为益阳,Ⅱ类包括常德、永州,Ⅲ类包括株洲、邵阳、娄底、岳阳、张家界、湘西、湘潭、郴州、衡阳、长沙,Ⅳ类为怀化;2016—2022年,湖南全省各市州的城乡融合发展差距呈扩大趋势,且在湖南中北部地区与西部地区分别存在“高-高”“低-低”的空间集聚中心。

优化国土空间发展格局视域下推进城市群一体化发展的空间逻辑

城市群是推动新型城镇化的主体形态和促进发展要素合理流动的空间载体,在支撑国民经济社会发展和提升国际竞争力方面发挥关键作用。优化国土空间发展格局蕴含引导要素优化配置的目标指向、提升空间结构韧性的实质内容、加快构建新发展格局的时代背景,为考察城市群一体化发展的空间逻辑提供有益视角。从宏观顶层设计、中观权力运作、微观主体行动来看,优化国土空间发展格局中的城市群一体化发展,涉及空间规划与发展规划协同引领、空间尺度与权力结构的动态适配、核心城市与重要主体的辐射带动。根据优化国土空间发展格局的价值导向与功能预期,新时期健全城市群一体化发展机制应规范完善空间规划程序、优化升级空间治理体系、渐进实现空间正义,逐步形成优势互补、均衡发展的城市群布局与国土空间体系。

城乡均衡发展大格局下我国公路服务区大网建设研究

当前我国高速公路服务区功能与畅通全国城乡产销大循环要求存在五大矛盾:一是服务区封闭,过路消费需求与沿线乡镇农特产品供给脱节;二是旅客上下中转受限,营运公司客流补充成本高昂,始发终到旅客集散时间成本猛增;三是小批量物流快件不能直接沿线集散,私营公司抢占赢利路线而弃舍高速沿线乡镇小批量件;四是旅客需求日益多样化,服务种类相对国外而言极其单薄;五是城市停车难,关键要靠市郊和城乡路网。建设开放型服务区且注重城乡均衡布点成网,是日韩和法德推动消费惠及城乡的重要成功经验,服务区集应急救援、旅客集散和换乘中转、物流仓储和快件集散交换、本地农特产售卖以及旅游观景休闲等商旅文于一体已成未来发展大势。在我国公路沿线建设数以万计的综合服务区和各类中小微网点,利用网点换乘中转实现全国客货邮“镇-镇”直达,可以更充分地发挥现有高等级公路的网络共享优势,更有效地实现客运增流、快递增质增量、城乡产销提质增速等国内双向大循环功能,将全国人民的日常经济社会活动汇集成为城乡一体共享生产、交换和消费大市场,助推实施乡村振兴,促进城乡融合发展。

以旅游“三交”铸牢中华民族共同体意识的理路

旅游高质量发展具有促进各民族交往交流交融的历史价值和时代意义,对铸牢中华民族共同体意识发挥重要驱动和链接作用。作为兼具文化互动和个体能动的现代服务业,旅游从“物质性—社会性—个体性”多方面嵌入各民族“三交”的具体交往实践和真实生活空间。在流动的现代社会,旅游活动能够建立跨文化动态关联,塑造多民族良序社会愿景和多维度认同,为推进中华民族共同体建设提供独特价值。为讲好旅游“三交”的中国故事,向世界展示中华文明的独特魅力,须以民族地区的旅游发展为内驱力,统筹中华民族的统一性与多样性,构建民族团结与主客互信的目的地,强化文化自觉自信与家国认同。