对农业科技在南京农业产业化中的作用的再认识

农业是一个受自然资源和市场双重制约的弱质产业，南京农业产业化要想在激烈的市场竞争中取得成功，在土地等资源日趋紧张情况下提高劳动生产率，实现农业增效、农民增收，愈来愈取决于产业的科技含量和技术创新的程度。推进农业产业化经营，必须发挥南京的农业科技优势和相关的城市优势，提高农产品的市场竞争力，为农业产业化提供全方位的科技服务，用科技武装产业化的实施者，当好农业产业化宏观管理者的科技参谋，努力解决科技和农业产业化相结合上存在的有关问题等等。１　南京农业科技优势概述１－１　人才优势　南京有与农业和食品业…     

农业产业化地域模式形成中集聚-扩散机制分析——以烟台市栖霞蛇窝泊果品批发市场为例

在评述农业产业化及其地域模式研究现状的基础上，以烟台市栖霞蛇窝泊果品专业产业化经营模式为例，分析论证了集聚-扩散机制在农业产业化地域模式形成中的作用及其对农业产业化经营实践的有益启示。     

提高农业产业化经营中的科技含量是农业发展的希望

近年来，全国各地农业产业化经营发展较快，各种农产品蜂拥上市。但是随着农产品的不断丰富和受东南亚经济危机的冲击而导致市场的萎缩，我国的农产品市场已由卖方市场转向买方市场，粗放型、传统型的农产品逐渐滞销，这对于刚起步的农业产业化经营是个严峻的挑战，要使各地的农业产业化经营健康发展，出路何在？根据国内外农业产业化经营的经验教训和我们几年来的实践，注重提高农业产业化经营中的科技含量是我们的必然选择。一、农业产业化经营中提高科技含量的必然性和重要性农业产业化经营中的科技含量就是产业化过程各环节中诸如科学化…     

建设高新技术产业基地打造没有围墙的园区

高新技术产业（特色）基地是以促进高新技术产业化为目标,以产业集群理论为基础、集群化发展为路径,充分发挥人才、技术、信息、资本和市场等要素的集聚优势,依托一批产业特色鲜明、产业关联度较大、技术水平较高、创新能力较强的高新技术企业而建立起来的具有竞争优势的特定产业区域,被业界称为没有围墙的高新技术园区。     

振兴东北老工业基地必须加快发展现代化农业

长期以来，东北地区偏重型的工业结构、初级型的农业结构，以及工农、城乡之间的“双二元”结构，造成了工农业关联度的降低和互动机制的缺失。东北地区具有丰厚的农业资源和农产品规模优势，但长期得不到工业联动和支持，依托农产品原料的轻加工业落后，传统农业的规模优势弱化，致使农业产业化与社会化的进程缓慢，     

加快现代农业示范园区建设步伐

各地要根据苏州市现代农业发展的总体定位，按照每个市（区）都要建成1－2个具有一定规模的现代农业示范园区的总体要求，以基础设施投入为起点，生态建设为基础，高新科技为平台，招商引资为突破口，引进推广一批农业高新技术，吸引集聚一批产业化经营主体，培育壮大一批特色产业群，通过科学规划，合理开发，使园区逐步成为苏州市农业新品种的引繁中心，名特优农产品的生产基地，农业科技推广示范的窗口，三资开发的主战场，农业休闲观光的新胜地。     

江西产业发展中存在的问题及对策研究

江西产业发展中的主要问题是工业化水平低、产业加工度不高、产业投资存在明显的逆比较优势、产业经济成分结构不合理，从而整体经济效益不高。江西产业发展的根本出路在于解放思想、开拓进取：实施农业产业化政策，提高农产品加工度；振兴江西工业，实施工业强省战略；大力发展第三产业，提高第三产业劳动生产率。     

浅谈农业产业化在农村经济发展中的作用

农业产业化是我国农业走向现代化的必由之路。要解决"三农"问题,比较有效的方法是发展特色经济,加速农业产业化经营。其实质是为了拉长农业的产业链条,发展农产品精深加工,把企业经营引入农业领域,解决市场经济条件下农民面临的"小生产、大市场"的矛盾,以及种粮效益低下的状况,充分利用资金、技术、人才和市场的结合,激活本区域内的劳动力及土地等资源,使农业增效,农民增收。     

长三角地区县域乡村类型划分与乡村性评价

以长三角地区为例,首先划分出农业主导、工业主导、服务主导和均衡发展4种乡村发展类型;基于区域城乡一体的思想构建乡村性指数RI理论公式,对2000~2012年长三角地区乡村性及演变特征进行了探讨.研究结果表明:长三角地区农业主导、工业主导和服务主导的县域分别占总地域面积的13.79%、18.96%及12.06%,而均衡发展型的县域占到55.19%;农业型乡村分布在苏中、舟台地区,工业型乡村分布在苏锡常地区,而服务型乡村主要分布在宁甬杭地区;长三角县域RI总体上呈减弱趋势,乡村性空间格局与乡村类型划分具有较高关联性,苏中、舟台地区乡村发展农业主导,乡村性总体高值集聚,而苏锡常乡村发展工业主导,乡村性总体低值集聚,并且工业、服务主导型乡村性RI低于农业主导和均衡发展型;最后,提出未来长江三角洲地区乡村发展相关的重构建议.     

沿海发达地区发展高科技农业的模式选择

面对世界新技术革命的趋势及国内外高新技术产业迅速发展的形势；沿海发达地区发展现代农业必须要有效的思路。从扬长避短、发挥地区的比较优势出发，作者提出了一种新的农业发展模式，即沿海发达地区现代农业的发展模式，应该选择“开放型，高投入，高产出，高效益，精细密集化，生态型的现代高科技农业的发展模式。     

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…     

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)

正~~     

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.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.