我国知识密集型服务业创新格局的时空演化研究——基于探索性空间数据分析方法

知识密集型服务业创新是国家创新系统中知识基础结构的重要组成部分,对我国当前经济结构升级转型与创新发展具有重要的引领作用.该研究构建知识密集型服务业创新的综合评价指标,测算了我国31个省、自治区、直辖市的知识密集型服务业创新水平.在考虑空间因素影响的条件下,运用探索性空间数据分析法、核密度估计法研究我国省域知识密集型服务创新水平的空间分布、聚集模式及时空演变规律.研究发现,我国知识密集型服务业创新水平整体较低,形成不同的趋同俱乐部,出现俱乐部之间趋异的现象.KIBS创新在空间上总体呈现出由东向西递减的“核心—边缘”结构,创新扩散遵循着地理距离衰减效应.在时间演进上呈“单峰－多峰”的动态演进趋势和阶段性特征,呈现出不同的空间集聚模式,高高集聚区主要分布在江浙沪和环渤海心脏地带(北京和天津),而大西南和大西北大部分地区则属于低低的空间集聚模式.     

河南省生产性服务业集聚水平时空特征研究——基于区域和行业视角

河南省生产性服务业的空间优化布局对于区域产业调整、制造业发展,促进河南经济发展具有重要意义.运用全局主成分分析、克鲁格曼专业化指数、空间基尼系数、区位熵等方法从区域和行业两个视角分析河南省生产性服务业集聚水平的时空特征.结果表明:①从区域视角来看,运用全局主成分分析,在时间维度上,只有郑州得分一直呈上升趋势,且变化较大,其他省辖市则变化不大;在空间上差异明显,郑州集聚水平处于绝对优势.运用克鲁格曼专业化指数分析,时间维度上生产性服务业专业化程度不高,产业结构有异化的趋势,但从空间角度来看,除濮阳外产业结构整体变化不大.②从行业视角来看,在时间维度上,除科学研究、技术服务和地质勘查业以及批发和零售业外,其他分行业和整个生产性服务业集聚水平都大致呈倒"V"形分布,整体上呈上升趋势,且知识和资本密集型行业集聚水平较高;从空间角度来看,市域范围内,整个生产性服务业及各分行业集聚格局整体相对较稳,局部变动明显.     

浙江生产性服务业和制造业产业集聚度及发展态势研究 ——基于产业空间集聚视角

根据2003—2012年浙江省生产性服务业和制造业的时间序列数据,利用空间基尼系数、赫芬达尔指数、EG指数以及三市集中度对其产业集聚水平进行测度,并从产业内企业间集聚程度和产业地理上的空间集聚程度两个层面进行深入分析。结果显示:产业地理上的空间集聚程度与产业内企业间的集聚程度存在不一致性,产业地理上的空间集聚发展态势与产业内企业间的集聚发展态势也存在不一致性,生产性服务业与制造业的产业集聚呈现出较为明显的集聚相关性特征。     

浙江生产性服务业集聚特征及影响因素研究

对2005—2015年浙江省生产性服务业的集聚特征、空间分布和影响因素进行研究。结果表明:浙江省生产性服务业处于集聚发展阶段,2015年生产性服务业集聚程度从高到低依次为信息技术业、科研技术业、商务服务业、交通运输业、金融业。整体上浙江省生产性服务业空间分布较均衡,但各分行业空间分布呈现不同的变化趋势。市场需求、人力资本与对外开放程度对浙江省生产性服务业集聚发展有促进作用,但政府作用、信息化水平、城市化水平对浙江省生产性服务业集聚发展的推动作用不明显。最后,提出了促进浙江省生产性服务业发展的政策建议。     

科技服务业的集聚特征与影响因素研究 ——以珠三角为例

科技服务业在技术扩散和知识传播过程中扮演重要角色,是连接科技与经济的有效桥梁和纽带。产业集聚化是科技服务业发展的一种空间演化形式,而且产业集聚也会带来一定的规模效应和知识溢出效应,对于带动产业和经济的发展具有很重要的意义。研究以珠三角为例,运用空间基尼系数、区位熵指数对科技服务业集聚特征进行分析,在此基础上分析了珠三角科技服务业发展的影响因素,进而提出促进科技服务业发展的相关建议。     

浅议生产性服务业在城市创新中的作用

生产性服务业是典型知识密集型服务性产业,它能产生极强的集聚和辐射效应,极大的提升城市的综合服务功能,增强城市在区域乃至全球的综合竞争力。因此,生产性服务业的发展与城市功能提升表现出相辅相成的互动关系。对于以建设国际化大都市和国家创新型城市为发展目标的武汉而言,发展生产性服务业更成为当前经济领域一项重要而紧迫的任务。本文从生产性服务业对城市创新能力的提升作用入手,结合武汉生产性服务业的现状和趋势,分析两者间的相互作用,得出大力发展生产性服务业能增强武汉城市创新能力的结论。     

现代服务业发展空间溢出效应的实证研究

现代服务业发展具有空间溢出效应,可以推动本地制造业外移,并逐步形成现代服务业与制造业协同集聚的产业空间格局。这有利于促进产业分工演进与城市价值链重组,从而实现区域经济的协同发展。在政策涵义上,要以现代服务业发展为主导,加快产业价值链的地域空间重组,建立面向大都市圈的产业分工与协作体系。要以产业结构服务化转型为方向,统筹区域工业化与服务化进程,打造"优势互补、一体发展"的区域经济发展格局。     

北京市体育产业企业时空格局特征及其优化策略

基于北京市18 000余家体育产业企业信息,综合运用GIS地理空间分析,探寻基于微观企业数据的城市体育产业空间格局.发现:①北京市体育产业空间集聚特征明显,且体育服务企业集聚规模、程度均大于制造企业,产业趋向核心竞争要素集聚、非核心竞争要素扩散的空间演化趋势;②时间演变:以体育赛事为核心的体育产业发展模式,将在首都经济、政治和文化圈层内,逐渐催生新兴体育相关产业产生,产业发展导向作用将进一步提升;③空间演变:规模以上企业选址并未集聚于主城区企业高度集聚区域,而注册资本较少、规模较小的体育服务企业则扎堆积聚于主城区高地价、高人才集聚区,且新注册企业多围绕体育产业基地选址,产生空间集聚效应.     

我国智慧养老产业的区域集聚特征和空间发展模式

依托国内“企查查”网站的智慧养老企业数据，采用核密度估计、区位熵、局部莫兰指数与线性回归等方法，探讨我国智慧养老产业的区域集聚特征。研究结果显示：我国智慧养老产业的集聚分布已出现溢出效应且形成六大产业中心；各省份的产业集聚较明显，但省际的产业集聚不够明显；智慧养老的基础产业及工业表现为内陆型集聚，而服务业则呈现沿海型集聚；各省份智慧养老的基础产业、工业和服务业的企业数量与该省份一二三产业GDP显著正相关，同时第一产业GDP对智慧养老企业数量的正向影响最大；智慧养老产业已形成了长三角融合服务模式、粤港澳协同发展模式、成渝竞争发展模式和京津冀均衡发展模式等空间集群发展模式。     

贵州省知识密集型服务业发展现状

知识密集型服务业具有强大的外部经济效益,为经济社会发展提供智力服务和科技支撑,是区域竞争力和现代化的重要体现。近几年贵州省科技创新能力大幅提升,但知识密集型服务业尤其是科学研究和技术服务业发展相对较缓,从贵州省知识密集型服务业发展现状入手,探究了提升贵州省科技创新能力的有效途径。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.