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计算机在土木工程中的应用十分广泛,尤其在结构设计方面已表现出巨大的优势。基于框架结构设计的基本原理,应用VB6.0语言开发了相应的计算机辅助设计软件。该软件以人机交互方式输入原始数据以及计算参数,各种数据以图形方式显示,形象直观。简要介绍了该软件的设计思想、原理以及实现方法。 相似文献
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计算机在土木工程中的应用十分广泛,尤其在结构设计方面已表现出巨大的优势.基于混凝土框架结构设计的基本原理,我们应用"Visual Basic"语言开发了相应的计算机辅助设计软件.本文主要介绍了该软件的设计思想、原理以及实现方法. 相似文献
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ZHANG Ning HU Shengde 《东北农业大学学报(英文版)》2010,(1):90-96
With the development of China's market economy, the agricultural products' market has changed from the seller's market into the buyer's market. Therefore, the limitations of the household contract responsibility system gradually appeared. The farmers professional cooperatives not only covered the limitations but also effectively connected the small-scale farmers with the competitive market by increasing the farmers' organizational degree. However, during the development process of farmers' professional cooperatives, many problems were exposed. By using SWOT analysis belonging to the field of enterprise strategic management, this paper discussed the opportunities and threats of the external environment, as well as the strengths and weaknesses of the internal environment of Chinese farmers' professional cooperatives. Thereby, it proposed some development strategies for Chinese farmers professional cooperatives in the current stage . 相似文献
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A mechanism and operation principle of the original structure of the reclamation chisel-fertilizer is presented. The advantage of the design consists in the possibility of the uniform supply of the fertilizers and ameliorants to the plowing and subsurface soil layers, which ensures an increase of the fertile layer, improvement of the nutrition conditions of the plants, and, as consequence, an increase of the yield of the cultivated crops. The pressure supply of the ameliorants to the layer is carried out by a high-pressure fan with a pressure air duct, fertilizer tube, by which the fertilizer-air mixture is supplied under the A-blade. The ameliorants are supplied to the trapezoidal deformation zone of the subsurface soil layer created by the chisel working element below the furrow bottom. The calculation of the structural elements of the mechanism is given. The developed structure also allows for combining the operations on applying the ameliorants, which increase the complex criterion of energy efficiency to 15%. The use of the developed structure in the agricultural production allows keeping and restoring the soil fertility. 相似文献
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《农业图书情报学刊》2012,24(2)
读者的阅读倾向决定着图书馆藏书结构的构成,它是图书馆建设的核心要素。以沈阳工程学院图书馆读者阅读需求为研究对象,对2008—2010两学年的中文图书流通数据进行统计分析,进而从读者需求的角度找出藏书结构存在的不足,分析我院图书馆藏结构的合理性,为图书采购工作提供理论依据。 相似文献
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Unbalanced agricultural production decision becomes the great block that influences the effective distribution of social resources, national grain security, social stability and economic development. This paper took the game theory as an analyzed tool to describe the interactional processes among the peasants, and set up the game theory model of independent decision and joint decision by peasants. It was shown that the government's positive guide and the market environment macroscopically controlled by the government could effectively increased the peasants' income 相似文献
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ZhaoZhengwen MaJifeng LiXiaohong 《农业科学与技术》2000,1(3):14-18
There are three ecotypes of soybean cultivar in Hunan Province: spring soybean, summer soybean and autumn soybean. Spring soybean has become the leading cultivar used in soybean's commercial production in Hunan these 30-40 years along with the growing improvement of the double-cropping of rice in the province which has reduced the area of the summer and autumn soybean gradually. Soybean produced in the province is almost consumed as processed food. 相似文献
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Analysis of the articles and author' s group for the Chinese Journal of Applied Ecology in 2009-2011
《农业图书情报学刊》2012,24(6)
以《应用生态学报》2009年--2011年载文作者为统计对象,对载文量、第一作者单位、职称、年龄、合著情况进行统计分析。结果表明:《应用生态学报》2009年~2011年共栽文1404篇,期均发文量39篇,篇均页数7页。第一作者单位以高校最多,占64.4%,科研院所其次,占33.3%;第一作者主要为在读硕、博士研究生,占48%,其次为具有中、副高级职称人员;作者年龄主要集中在40岁以下;论文以合著类型为主。编辑部应针对主要作者群体加强沟通和重点培养,使其成为刊物未来稳定的撰稿人。 相似文献
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《农业图书情报学刊》2012,24(7)
中文连续出版物的样本缴送问题多年来一直困扰着每一个从事国家图书馆采访工作的人员。如何解决这一问题也是业界同仁非常关心的,文章通过对2005-2009年度年缴送情况的对比,提出只有出版单位、国家图书馆、新闻出版总署等三方共同努力才能达到最终目的,以确保国家图书馆馆藏中文连续出版物的完整,才能使国家总数库的职能得到最大的发挥。 相似文献
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《农业图书情报学刊》2012,24(4)
在知识经济与网络环境的双重背景下,高校图书馆是高校的信息中心和学生的"第二课堂",也是现代化、信息化、智能化、社会化的集中体现。在这里,高校图书馆应该扩展服务的空间,加速馆藏资源的信息化、网络化,信息的编制和集成,开展多媒体图文和声像服务。同时,还可以用现代企业的管理方式,促进读者服务模式的发展创新。 相似文献
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《农业科学与技术》2000,1(3):4-5
2000 is the beginning of the new millennium from which on Hunan's agriculture will meet with a new challenge and chance. Hunan will carry out 12 central agricultural engineering projects in the early stage of the new century to promote the adjustment and optimilization of the province's industries for agricultural production and development, speed up the new technological revolution to prosper agriculture with science and technology, accelerate agriculture's opening to the outside world in depth and richen farmers through their income increase from both high crop yield and favourable marketing price. These 12 projects are as follows: 相似文献
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《农业图书情报学刊》2012,24(1)
运用解构计划行为理论(DTPB),检测馆员对图书馆集成系统(ILS)的接受度。通过对23家图书馆的问卷调查得知,基于DTPB的拓展模型,大部分因素间呈显著正相关。此外,任务技术适合度与自我效能显著,直接影响使用的态度。 相似文献