农业产业化与农业的两个转变

农业产业化是农村改革和发展中出现的一个新事物,它的重要作用和强大生命力已引起理论工作者和各级政府的重视.本文对农业产业化与农业两个转变的关系进行了一些初步的分析和探讨,指出农业产业化是实现我国农业两个根本性转变的根本途径.     

大连市农业产业化发展研究

农业产业化既具有全球普遍性，又具有区域特殊性，各地都可根据本地资源优势、区位优势发展本地区的农业产业化经营。以农业产业化的基本理论为指导，在深入调查研究的基础上，系统地论述了大连市发展农业产业化所具备的优势条件、发展现状及存在问题。通过调查研究、比较分析，结合地域优势、产品优势和经济优势提出了发展农业产业化的思路与对策，可为各级政府、相关部门、企业和农户发展农业产业化提供理论依据及借鉴参考。     

黄河滩区绿色养殖带开发与农业经济转型契机--以开封黄河滩区为例

把畜牧养殖业作为开封市农业发展的突破点,结合农业产业结构调整和开封的地域优势,研究开封市农村产业化发展的新契机.最后,分析了开封市发展奶业的优势条件,并针对发展过程中应该注意的各种问题提出了相应的对策.     

关于"农业产业化经营情况"的专题调研报告

农业产业化经营是农业结构调整和农村发展的战略性措施。阐述了甘肃实行农业产业化的必然性 ,提出甘肃实现农业产业化的途径是 :大力培育和发展以特、新、大为基本特征的农产品商品生产基础 ;培育和壮大龙头企业 ,促进农产品加工转化 ;强化市场体系建设 ,扩大农产品销售 ;改造传统农业 ,加快农业科技的引进与推广。     

黄河滩区绿色养殖带开发与农业经济转型契机——以开封黄河滩区为例

把畜牧养殖业作为开封市农业发展的突破点，结合农业产业结构调整和开封的地域优势，研究开封市农村产业化发展的新契机．最后，分析了开封市发展奶业的优势条件，并针对发展过程中应该注意的各种问题提出了相应的对策．     

让"龙头"昂起来——苏州市农业龙头企业的产业化之路

农业龙头企业是指以加工和销售为龙头,联结基地和农户,具有较强的辐射带动作用,能够促进农业增效和农民增收的规模型企业。实践证明,推进农业产业化经营,关键是培育和发展壮大农业龙头企业,核心是辐射、带动农业、农民。农业龙头企业是推进农业产业化的有效载体,是促进农业结构调整,发展效益农业的客观要求,也是提高农业市场竞争力的重要措施。近年来,苏州市积极培育农业龙头企业,这些昂起来的“龙头”带动着千千万万的农户走向市场,推进社会主义新农村建设,农业产业化经营取得了明显成效。据统计,到2005年底,苏州市年销售收入超500万元或利税超50万元的规模型农业龙头企业共有企业330家,比上年同期增加42家,实现销售收入510亿元,利税总额25.5亿元,出口创汇3.3亿美元,同比分别增长15.6、17.0%和3.1%,联结农户125.6万户,带动各类种、养基地面积433.7万亩。两个省级重点农产品批发市场实现交易金额和交易量分别比上年增长29.2%和4.3%。     

重构淮北农业发展新的支撑体系

改革开放以来,淮北市农业取得了明显的成效,粮食产量、人均收入、产业结构调整出现了前所未有的成绩.但是,面对我国全面加入WTO和市场农业竞争加剧的现实,不能盲目乐观、更不能沾沾自喜.目前淮北市农业仍面临千家万户的小生产与千变万化的大市场之间、农民生产规模小与实现农业产业化之间、农业的社会效益高与农业自身效益低之间、农产品过剩与农业结构调整缓慢之间和社会对农产品多样化、优质化、方便化、绿色化的高需求与农产品加工低之间的矛盾.呈现出农村工业化、农业市场化、国际化、农村城镇化趋势和农民组织化趋势.面临如何实现中长期粮食供应平稳、如何实现劳动力充分就业、如何实现农业和农村经济可持续发展的问题.     

财政支持农业产业化项目管理探究

农业产业化项目对于促进农业结构调整和优化,增加农民收入起着四两拨千金的作用,为解决＂三农＂问题做出了贡献。农业产业化项目的开展通常需要通过政府财政进行支持和引导,有效的项目管理则是这种财政支持方式成功的关键。本文通过介绍福建省农业产业化项目的财政投入现状和取得的成效,分析其存在的问题,最后从立项评审、过程管理、制度建设和统筹协调等方面对财政支持农业产业化项目管理提出建议。     

关于厦门市农业社会化服务体系建设的对策研究

一、厦门农业社会化服务体系现状与问题 农业社会化服务是伴随着农业生产由分散的、孤立的、自给自足的小生产方式转变为分工细密、协作广泛的商品化社会生产而产生的,是农业产业化发展和现代化建设的客观要求.改革开放以来,我市农业社会化服务体系建设取得一定成效.     

我省农业产业化的发展

农业产业化问题,是关系到农村深化改革和农村经济发展的一个重大课题。为深入探讨这个问题,推进我省农业产业化的发展,本文拟就其含义、组织形式、产生发展的客观必然性以及怎样推进农业产业化问题,谈些粗浅认识。     

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)

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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.     

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.