共查询到20条相似文献，搜索用时 46 毫秒
1.
本文从持续发展、持续性等基本概念出发，进而讨论了持续农业与农业持续性的概念和持续农业的基本内容（土壤保护、多样化的耕作制度和生物技术的应用），结合我国国情，提出了持续农业的基本任务：因地制宜，优化农业结果，改进耕作制度，降低农业资源的消耗速度，提高其利用 持续发展、持续农业、粮食保障体系 相似文献
2.
中国农业与农村可持续发展的障碍与对策 总被引：4，自引：0，他引：4
实现农业与农村可持续发展是社会发展的必然要求。本文论述了中国可持续农业与农村发展的提出过程及基本内涵，分析了中国可持续农业与农村发展面临的矛盾与障碍，最后提出了今后发展的道路与对策。 相似文献
3.
中国农业、农村持续发展与科技对策 总被引：1，自引：0，他引：1
45a年来，中国农业生产持续发展，但近年钝化；农民基本解决温饱但未脱离贫穷；主要农区生态条件改善，非农区丘陵山区恶化；资源环境形势严峻。当前中国面临能否持续发展的十字路口，强项在弱化，弱项在激化，21世纪目标——实现农业现代化，集约持续农业是中国通向农业现代化 农业与农村持续发展、集约持续农业 相似文献
4.
新疆生产建设兵团可持续农业技术变迁的对策研究 总被引：1，自引：0，他引：1
农业可持续发展实施的关键是农业可持续发展技术的进步.本文在分析制约新疆生产建设兵团农业持续发展主要因素的基础上,认为采用可持续农业技术对兵团农业持续发展具有重要支撑作用,并提出了兵团可持续农业技术变迁的路径、对策措施和政策建议. 相似文献
5.
张存生 《内蒙古科技与经济》2006,(12):16-17
实现我国农业可持续发展战略,必须抛弃旧的发展观,树立符合时代要求的新的科学发展观,走集约、高效、节约资源型的可持续农业发展道路。在实践中要因地制宜,实施区域发展战略,发展多种类型的可持续农业,对不同区域不同的经济发展水平,应采取不同的可持续发展模式和途径。同时,还要建立可持续发展的农业生态系统、可持续发展的农业技术系统和可持续发展的农业经济系统。 相似文献
6.
我国可持续农业评价指标体系建设的有关问题 总被引：12，自引：0，他引：12
本文旨在对我国可持续农业评价指标体系的设计与建设等方面的有关问题进行研究,从我国可持续农业评价指标体系的设计目标与内容、评价指标的类型与结构、指标体系的基本特征等方面进行了较为系统的分析。文章最后提出了我国可持续农业评价指标体系建设过程中所必须加以重视的有关问题,对可持续农业指标体系的设计具有一定的参考意义。 相似文献
7.
本文首先论述了我国农业文献资源的地方优势,并列举了部分地区的农业连续出版物和西北五省农业期刊的地区特点,文中简要分析了目前我国农业文献检索利用及科技情报工作发展的现状,认为建立农业文献数据库不仅是时代的需要,也是开发我国农业文献资源地方优势的良好对策,文中重点论述了建设西北专题农业文献数据库的意义、条件以及策略与方法。 相似文献
8.
中国农业持续发展与生态学研究 总被引：3，自引：1，他引：3
中国农业发展已基本越过温饱要求,经济效益已成为普遍追求的首要目标。然而,中国农业现实要求认真对待供需平衡及生态平衡,这是首要的国家目标之一。在生态系统水平上对农业进行设计和组装的生态学研究,以及在品种选择与种养技术方面进行优化的农学研究的结合,可建立起农业持续发展模式,能促进农业三大效益统一。当前农业持续发展模式研究可识别出的重点有:(1)小流域的农业持续模式,(2)克服环境制约因子的农业持续发展模式和(3)绿色食品原料生产基地农业模式。这类研究的技术路线中应注意资助年限、过程变化、农民实践、多模式的比较、设计实用简单模式,注意模式非流特点、配套措施和失败模式总结等。 相似文献
9.
喀斯特贫困地区可持续农业发展战略研究--以贵州省为例 总被引：1，自引：0，他引：1
农业是喀斯特贫困地区可持续发展的基石和优先领域。面对生境的恶化、资源的稀缺、人口的膨胀等一系列严峻问题，喀斯特地区农业惟有走可持续发展的道路，才能摆脱传统农业经济发展的束缚和颓势，进而实现整个喀斯特地区社会经济的可持续发展。本文从阐述喀斯特贫困地区农业经济与资源环境态势出发，指出可持续农业是喀斯特贫困地区农业实现可持续发展的现实选择，并提出了可持续农业发展的三大目标和五项原则，在此基础上给出了新形势下保障农业可持续性发展的战略措施。 相似文献
10.
我国农业信息化发展的瓶颈与应对策略思考 总被引：6，自引：0，他引：6
农业信息化发展的核心是信息服务,信息服务的重大需求是个性化、专业化与低成本、可持续。以农业为应用背景、农村为实施环境、农民为服务对象的我国农业信息化发展面临的困难与瓶颈问题是：农业生产环境多变,信息要素难以大面积、低成本、快速准确地获取;农业生产过程分散,异质、异构、海量、分布式大数据处理技术缺失;农业生产主体复杂,需求千变万化主动扑捉困难。对此提出如下应对策略：集中我国优势力量突破农业传感器核心技术,打破国外封锁形成系列装置、装备与仪器仪表;加快云计算与大数据处理技术研究与农业应用,开发农业大数据库管理系统、农业大知识库管理系统等基础软件系统,实现数据处理的智能化;在国际数据资源描述标准框架下,建立我国农业信息资源描述标准、数据资源定价协议,实现数据资源建设的标准化、市场化与可持续发展。 相似文献
11.
A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
12.
《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
13.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
14.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
15.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
16.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
17.
Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
18.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
19.
Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
20.
Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献