论我国都市型农业的发展

:都市型农业为城市不仅提供新鲜、营养、多样化的物质供给 ,还有生态环境、科学实验、绿色文化、科普教育、休闲娱乐的多元化功能。与传统的“粗、脏、累”的农业形象相比 ,都市型农业是充分运用高新科学技术的高智能绿色产业 ,是一种全新的“细、净、雅”的高智能产业。我国发展都市型农业应注意规模化、市场化 ,产加销、产研教、农工贸形成一体化     

天津都市型现代农业发展水平评价

在界定沿海都市现代型农业概念的基础上,应用熵权法从粮食安全水平、产业化经营水平、现代化生产水平、可持续发展水平和绩效水平5个领域评价了天津都市型现代农业的发展水平.研究结果表明,现代化生产水平对天津都市型现代农业发展影响最大,而可持续发展水平和产业化经营水平影响较小,人均耕地面积、土壤质量、水资源等因素严重制约了天津现代农业的发展,应大力发展科技型、节水型、生态型农业.     

都市型农业与政府责任——以宁波市为例

从城郊型农业过渡到都市型农业,是都市建设现代农业的必由之路,具有历史的和逻辑的统一。都市型农业是一种集约化、多元化、多功能、发达形态的农业。新世纪宁波选择都市型农业发展之路具有客观性、必然性。作为地方政府的责任是：科学规划、政策拉力、重在服务。     

北京蛋鸡良种有效打破国外垄断

2010年4月中旬，致公党中央领导就“都市型现代农业”到平谷区峪口禽业进行调研。位于平谷区的北京华都峪口禽业有限责任公司，是目前国内最具实力的现代化蛋鸡繁育基地，拥有“京红”和“京粉”两个鸡蛋配套系，填补了优质蛋鸡国产化空白。该公司首创的“产权式”农业作为“政府搭台企业主导”的新模式，开辟了带动京郊农民增收致富的新途径，创新了都市型现代农业产业发展新模式。     

我国新型农业现代化发展水平的综合评价——以河南省为例

借鉴农业现代化发展经典理论和其他学者的研究,结合新型农业现代化的内涵和新型工业化、城镇化、信息化和新型农业现代化的关系,从农业生产现代化、农村现代化、农民现代化和“四化”协调发展四个方面构建评价指标体系,并运用灰色多层次综合评价模型,针对河南省18个主要城市的新型农业现代化发展水平进行评价,其评价结果是河南省18个主要城市新型农业现代化整体发展水平较高,通过实证分析证明该方法评价我国新型农业现代化发展水平具有较强的实用性和可行性。     

各地现代农业园区建设的进展和动态

改革开放以来，我国的农业生产发展取得了显著的变化。80年代乡镇企业的崛起，大大增强了农村的经济实力，为农业现代化创造了条件。进入90年代后，各地在实施“八五”、“九五”计划中，逐渐把建设现代农业园区作为重要内容；近两年发展势头很猛，建设热情很高。下面选择部分省市的情况作一简介。1．上海上海是长江三角洲经济开发的龙头，在农业现代化方面正以崭新的面貌面向21世纪。为发展都市型现代农业，上海市建设了一批具有现代化设施、高科技含量、集约化经营、产加销一体的现代农业示范区。早在1994年，上海就为10个市级示范区投资…     

南宁市都市型农业发展初探

分析南宁市发展都市型农业的优势条件和制约因素．认为南宁市的农业物质和科技装备水平明显提高，农村产业结构得到有效调整，农业产业化步伐不断加快，技术储备充裕，科技信息通畅，旅游观光农业已初见端倪，人民消费水平较大幅度提高，但是南宁市没有从根本上形成适度规模的区域化布局的现代农业发展格局，农业结构优化不够．农业社会化服务体系发展滞后，耕地资源匮乏，环境矛盾日趋严重。提出南宁市发展都市型农业首先要进行产业结构重组，合理规划，调整种植业和畜禽生产规模，实现多样化和多功能化；其次要调整产业组织，积极培育和扶持龙头企业，加大科技投入和推广力度，支撑和引导都市型农业发展；第三要调整农业空间布局，把外环路以内作为城市化生态农业区，城北区、江南区、武鸣县南部等地作为近郊生态休闲创汇农业区．鸣县北部、邕宁县大部、隆安县等地作为远郊综合农业区，空间上将表现出近、中、远郊结构功能渐次的格局。     

数字农业研究进展及发展天津数字农业的建议

介绍了农业信息技术、精确农业及数字农业的概念及发展动态。根据天津耕地资源、水资源、农业环境状况等，提出了天津发展数字农业的必要性。针对天津沿海都市型农业发展的需要，提出了有关天津发展数字农业的一些建议。     

我国大城市面对新世纪的都市型农业发展研究

一、都市型农业产生的背景分析当今的世界是城市化的时代。随着人类经济、社会的发展，城市作为人类生产生活的载体，必然相应地急剧扩张。西方国家在本世纪初到五六十年代，城市化道路经历了一个无序扩张和膨胀的阶段，其沉重的代价是生态环境和传统文化的巨大破坏。城市普通出现了人口高度聚集、工业集中、交通拥挤、住宅匮乏、土地投机、私人汽车猛增、城市生态环境迅速恶化。令人头痛、诅咒的“综合城市病”威胁着居民的生活与健康，有的城市甚至发生了惨重的城市环境污染事件。自７０年代以来，开始了规模巨大的生态环境工程，包括综合…     

佛山市现代农业的发展对策

佛山市提出要率先基本实现社会主义现代化，如果没有农业的现代化是不行的。而农业现代化是最困难、最复杂的。本文根据国内外农业发展的现状和态势以及佛山市的实际情况，提出：1．发展生态农业，促进可持续发展；2．进行适度规模经营，促进农业人口的空间转移和城镇化发展；3．加快信息化建设，解决农村“信息温饱”问题；4．实现农业科技示范园区与城市农业的有机结合；5．适度反哺农业；6．加快农业结构的调整，实现农业产业化经营；7．加快农业教育，提高农民素质等作为佛山市有选择性地推进现代农业的发展对策。     

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.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

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

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

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

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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