农业机械的绿色设计

本文提出了农业机械进行绿色设计的观点,阐述和分析了农业机械绿色设计的综合评价体系的评价准则和评价指标的构成与内容,讨论了农业机械绿色设计的内容。     

《科技活动》MCAI课件的设计和实现

提出运用AutoCAD、3DSMAX、EWB等软件进行图形、图像的生成,再按脚本要求将各种媒体信息进行集成,制作为交互式多媒体教学软件的实现过程。     

Design of Information Technology Application System for Automotive Industry

The situation and the future of the automotive industry information construction is shown in this paper. The significance of Chinese automotive industry information construction is discussed,and the technology base and system structure is also described. The function and the structure of information system by one application of marketing plotting system in one automobile factory's E-commerce are introduced.The important significance for develop and research of product and strategic decision is shown by building market demand information system.     

端部圆锥形薄壁构件的抗撞性设计优化

基于显式有限元技术,采用响应面法,以结构的比吸能为优化函数,研究了圆形截面金属薄壁构件的端部锥形尺寸对抗撞性的影响;经过数值分析,得出了端部为锥形的圆形截面薄壁构件的比吸能关于锥形长度和锥边直径的变化规律,这些规律可以用于实际吸能原件的设计,并为进一步研究奠定了基础.     

实木橱柜的包装设计

实木橱柜体积大、质量重,通常采用整体包装的方式。根据物流过程情况提出半封闭和全封闭2种包装方式,并对全封闭包装中的瓦楞纸箱包装和蜂窝纸箱包装进行分析和比较。     

应用均匀设计研究电场刺激及培养因素对甘蓝叶原生质体分裂频率的影响

应用均匀设计法探讨了电场刺激及培养因素对甘蓝叶原生质体分裂频率的影响。结果表明 ,电场方向和强度强烈地影响细胞分裂频率。培养成分对细胞分裂频率均有不同程度的影响。均匀设计能筛选最优的植物原生质体培养条件或培养基。结合“回归 -通径”分析 ,有效地综合评判和研究了各培养成分对原生质体分裂频率的作用     

福州左海公园风情园设计分析

在诸多限制条件下进行福州左海公园风情园的设计,巧妙构景,因势借景,注重环境对人造景观的衬托效应,同时对以人造景观为主的园林设计进行探讨。     

现代设施蔬菜农业园区发展模式探索

从我国设施蔬菜的发展现状出发,针对生产型农业园区的规划理念、市场定位、近远期规划方向、功能分区、分项规划、规划保障等方面均进行了研究,对于生产型农业园区近期应具备的各项功能区进行了进一步的阐述与研究,同时针对设施蔬菜现代农业园区的远期建设模式进行了阐述。     

利用响应面分析法优化向日葵盘中果胶的提取工艺

利用响应面试验设计考察提取温度、提取时间、料液比和pH值几因素对果胶得率的影响。研究结果发现,提取时间、温度和pH值对提取率有显著影响,向日葵盘果胶的最佳提取条件为提取温度79℃、提取时间80min、料液比0．04、pH值3．20。向日葵盘果胶最大得率为10．44％。     

Genetic variability and inheritance of aluminium tolerance as indicated by long root regrowth in lucerne (Medicago sativa L.)

The objective of this study was to quantify the genetic variability and determine the inheritance of Al tolerance in lucerne (or alfalfa) using a 4-parent diallel mating design. Regrowth root length (RRL), along with root length (RL) and total root length (TRL), was measured to indicate relative Al stress response using a hydroponic system in a 3 μM Al solution at pH 4.5. A diallel analysis indicated the significance of general combining ability (gca) variance for RRL but not the specific combining ability (sca) variance; the same result was obtained for TRL but not for RL. For both RRL and TRL, genetic variance appeared to be more important than the environmental variance. For RRL, a strong but non-significant correlation was indicated between parental performance and their gca effects; while mid-parent heterosis and/or over-dominance were detected, as associated with the expressed sca effects in several combinations. These results suggest the complex genetic nature and expression of Al tolerance in the 4-parent diallel crossing system tested. Al-tolerant parent, GAAT‘S’, was the most promising parent, conferring the highest gca effects for RRL as well as for other two characters. The existence of significant gca variance in RRL may also suggest the feasibility of improving Al tolerance through enhanced root regrowth using phenotypic recurrent mass selection to pyramid desirable Al-tolerant genes, focussing on parental lines and/or elite individual plants expressing long regrowth roots.