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.

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.

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.

Approach to conceptual data integration for multidimensional data analysis in e-commerce

In e-commerce the multidimensional data analysis based on the Web data needs integrating various data sources such as XML data and relational data on the conceptual level. A conceptual data description approach to multidimensional data model the UML galaxy diagram is presented in order to conduct multidimensional data analysis for multiple subjects. The approach is illuminated using a case of 2_roots UML galaxy diagram that takes marketing analysis of TV products involved one retailer and several suppliers into consideration.

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.

Research on the Modern Precision E-commerce Marketing Model under the Big Data and Pattern Recognition Background

In this paper, we conduct research on the modern precision e-commerce marketing model under the big data and pattern recognition background. Large amount of consumption data provides the electricity enterprises grasp the user consumption pattern and the basis of the electric business enterprise through the use of big data can be personalized, accurate and intelligent advertising push service, service mode for the creation of more interesting and effective. Under this basis, electricity companies can also pass the assurance of pair of big data, looking for better increase user stickiness, development of new products and services, the ways and methods to reduce operational costs and accordingly, we propose the novel perspectives on the corresponding issues for the systematic level enhancement that provides the novel methodology of precision e-commerce marketing.

Foreign E-commerce Practitioners in “Taobao Village”: Isolation and Integration

This research mainly analyzes the actual situation of social integration of migrant E-commerce practitioners in Xintang Town of Guangdong Province through field survey.According to the survey,the overall level of social integration is relatively low,and there are three isolation barriers,namely time,space and psychology.Regarding the influencing factors of social integration level,it is concluded through the principal component analysis that five main factors impacting the social integration of migrant E-commerce practitioners are life factor,business factor,housing factor,social factor and individual factor.By establish a multiple logistic analysis model,it is found that type of friends,interest protection and frequency of recreational activities would impact the social integration of migrant E-commerce practitioners most significantly among all factors.

Process of Security Assurance Technique for Application Functional Logic in E-Commerce Systems

Security practices such as Audits that often focus on penetration testing are performed to find flaws in some types of vulnerability & use tools, which have been tailored to resolve certain risks based on code errors, code conceptual assumptions bugs, etc. Most existing security practices in e-Commerce are dealt with as an auditing activity. They may have policies of security, which are enforced by auditors who enable a particular set of items to be reviewed, but also fail to find vulnerabilities, which have been established in compliance with application logic. In this paper, we will investigate the problem of business logic vulnerability in the component-based rapid development of e-commerce applications while reusing design specification of component. We propose secure application functional processing Logic Security technique for component-based e-commerce application, based on security requirement of e-business process and security assurance logical component behaviour specification approach to formulize and design a solution for business logic vulnerability phenomena.

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.

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.

Spatial and Temporal Variation of Real Integrated Land Productivity of Yunnan Province

Taking Yunnan Province as an example,this paper calculated the real integrated land productivity(RILP)of 16 prefectures(cities)in Yunnan Province for the past 11 years(2009-2019),and analyzed its spatial distribution pattern.The research results show that the RILP of the whole Yunnan Province and all prefectures(cities)showed a slow upward trend.Among them,the province's RILP showed the highest increase in 2019 compared with the previous year;the RILP of all prefectures(cities)in Yunnan Province has significant spatial autocorrelation,showing obvious positive spatial agglomeration characteristics.Based on this,this paper proposes to improve the overall RILP in various regions according to local conditions and formulate countermeasures for coordinated development of various prefectures(cities).

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.

“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。

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。

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。

太忻一体化经济区医养旅游资源空间分布及利用模式

医养旅游资源是从区域性“旅医养资源融合”视角重新定义旅游资源,以当地居民作为旅游发展的最大受益者进行研究。借助GIS空间处理方法,结合最邻近指数、基尼系数、核密度分析法和规模度指数等方法分析太忻一体化经济区医养旅游资源空间分布特征及利用模式。研究表明太忻一体化经济区医养旅游资源空间分布特征有4方面:(1)医养旅游资源呈现“总体离散、局部集聚”的空间分布特征;(2)12个市区县内医养旅游资源分布具有不均衡性;(3)南部地区的医养旅游资源规模最大、最集中;(4)太忻一体化经济区的医养旅游资源空间分布的密集区域,即迎泽区、万柏林区、杏花岭区、尖草坪区,与其人口分布密集区域几乎一致。在对医养旅游资源空间分布进行分析的基础上提出以下利用思路:(1)主客共享的“旅医养融合”发展模式;(2)在产业融合发展基础上构建医养旅游产业集聚模式。通过研究为实现太忻一体化经济区空间优化和高质量发展提供理论依据。

砾岩致密油地质工程一体化井距优化——以玛131小井距立体开发示范区为例

玛湖砾岩致密油藏的开发存在着地层非均质性强,两向应力差大,天然裂缝不发育和物性差的问题,为了更经济有效的开发,在玛131井区首次开展了小井距立体开发现场试验,试验区整体采收率较高但经济效益并未达到预期,急需开展井距优化工作。本文采用地质工程一体化的思路和方法,建立了完整的立体井网井距优化流程,同时结合压裂参数和响应特征提出了一种多井多段条件下快速拟合压裂缝网模型的方法,主要包括:开展系统性油藏工程分析,基于精细地质和地质力学模型采用非常规裂缝模型进行复杂缝网模拟与拟合,耦合油藏数值模拟开展生产历史拟合,通过压裂数模一体化模拟完成了示范区井距优化并结合大范围井距矿场试验进行了验证。研究结果表明,解析缝长和模拟缝长结果可相互验证,百3段水平井裂缝相对较长,平均支撑半缝长70.1 m,平均水力裂缝高度24.6 m;百2段水平井裂缝相对较短且存在穿层效应,平均支撑半缝长61.1 m,平均水力裂缝高度28.3 m。在具备一定渗透性的地层条件下,两套开发层系的井距均可适当扩大至200~300 m,在确保较高采收率条件下提高单井产能和经济效益。本文优化验证后的井距范围可在同区块同层位进一步推广,所使用的立体井网井距优化流程可以被其他非常规油气藏类型所借鉴。