五自由度采摘机械臂运动学通用算法应用   总被引：2，自引：0，他引：2  

汪雨萌  钱桦  谭月胜  周满平 《安徽农业科学》2012,40(3):1757-1759

通过建立通用采摘机械臂运动学模型,构造初始矢量方程,完成求解,验证了基于Groebner基法的运动学算法的可行性,为采摘机械臂结构设计与控制研究提供了参考数据。  相似文献   

图书馆危机信息预警能力的评价     

杨景荣 《农业环境科学学报》2012,31(6)

参考企业危机信息预警能力评价的有关资料,从投入大小、环境支撑、管理控制、信息活动4个方面构建评价指标,运用模糊综合评判方法对图书馆危机信息预警能力进行评价,为图书馆采取相应措施,不断提升危机管理能力提供参考。

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天津市传染病医院图书馆总分馆模式的实践及思考     

朱德秀 《农业环境科学学报》2012,31(8)

简述了总分馆模式的背景,探讨了天津市传染病医院图书馆实施总分馆模式的必要性和过程,并针对存在的问题提出了相应的对策。  相似文献   

《普通植物病理学》多媒体课件的开发     

齐永霞  陈方新  丁婷  丁克坚  高智谋 《安徽农业科学》2009,37(11):5306-5307

介绍了《普通植物病理学》多媒体课件开发研究的背景、研究内容、功能模块及主要特色,分析了多媒体课件在《普通植物病理学》教学过程中应用后给学生带来的益处。  相似文献   

谈绥棱林业局努敏河自然保护区经营状况     

周国相 《林业勘查设计》2012,(2):16-17

黑龙江省绥棱林业局努敏河自然保护区是国家林业局批准的省部级自然保护区,本文主要介绍了自然保护区的概况及动植物资源情况,对自然保护区进行了综合评价,并提出发展建设。  相似文献   

安徽省林业血防工程之建设     

方建民  程鹏  张世清  赵学诗  丁常惠  肖正东 《安徽林业科技》2012,(2):85-92

本文阐述了安徽省血吸虫病及其中间宿主钉螺分布状况和特点、控制措施与方法。总结与分析了近年来安徽省实施的林业血防工程建设概况、综合治理措施、实施效果及其效益。  相似文献   

Aggressiveness and production of cell-wall degrading enzymes by Pythium violae, Pythium sulcatum and Pythium ultimum, responsible for cavity spot on carrots   总被引：1，自引：0，他引：1  

C. Campion  P. Massiot  F. Rouxel 《European journal of plant pathology / European Foundation for Plant Pathology》1997,103(8):725-735

This study investigated the relationships between pathogenesis, types of symptoms and in vitro production of cell-wall degrading enzymes by P. violae, P. sulcatum and P. ultimum. The three pathogens, considered as the three Pythium species principally responsible for cavity spot on carrot roots, secreted only low levels of fatty acid esterases activity, suggesting they have limited ability to degrade suberin in the walls of the outer cell layers of carrot tissues. Among the enzymes that degrade cell-wall polysaccharides, only pectate lyases and cellulases were produced by P. violae, and these were produced late and in small amounts: the symptoms caused by P. violae were limited and typical of cavity spot. Conversely, P. ultimum caused maceration of tissues, and secreted polygalacturonases and -1,4-glucanases earlier and in larger amounts than P. violae. P. ultimum also produced a large diversity of proteins and cellulase isoenzymes. Although secreting all the monitored enzymes in higher quantity than the two previous species, P. sulcatum was responsible for only typical limited symptoms of cavity spot, with a brown colouring. The role of plant reactions induced in response to early pectinolytic enzyme production by P. sulcatum may account for this apparent inconsistency.Died on April 11, 1997  相似文献   

Chloroplast biogenesis 91: Detection of δ-aminolevulinic acid esterases activity in higher plant and insect tissues     

Vladimir L. Kolossov 《Pesticide biochemistry and physiology》2005,83(1):9-20

δ-Aminolevulinic acid (ALA) esterase(s) is an enzyme or a family of enzymes that regenerate ALA from ALA esters by hydrolysis. These enzyme(s) are highly active in cancer cells. As a consequence ALA esters have been used to advantage in ALA-dependent photoradiation therapy, since ALA esters translocate better to sites of metabolism in cancer cells and tissues than free ALA. In this work, it is shown that ALA esterase(s) also occur in insect and plant tissues, but are less active than in cancer cells. In plant cells ALA esterase activity is observed in the cytosol as well as in the plastids where most of the activity is observed in the plastid stoma. The ALA esterase activity appears to be sensitive to the nature of the esterifying alcohol as well as to components of the incubation medium. The observed lower activity of ALA ester conversion to tetrapyrroles in insect and plant cells, in comparison to free ALA, suggests that the use of ALA esters in photodynamic insecticidal and herbicidal applications may not be as advantageous as their use in cancer photodynamic therapy treatments. It is proposed that ALA esterase(s) may be involved in the mobilization of sequestered and esterified ALA. Esterification and sequestering of excess ALA may be visualized as a mean of cellular detoxification.  相似文献   

县级土地利用总体规划实施评估——以东阳市为例     

吴祥福史学军  杨志强等 《安徽农业科学》2014,(21):7220-7224

新一轮土地利用总体规划基于保护耕地和保障建设的理念编制,目前规划处于实施之中。基于社会经济形势变化和土地利用政策调整,有必要对土地利用总体规划指标执行情况和规划与经济发展适应性进行评估,分析规划实施成效和存在问题,为下一步规划实施提供合理建议,以增强土地规划的科学性、适应性和可操作性,充分发挥土地规划的宏观调控和引导作用。该研究对县乡两级土地利用总体规划实施评估工作进行了具体分析,探讨了土地规划评估目的、评估内容、评估方法,最后得出评估结论,并提出规划实施建议。  相似文献   

北卡罗来纳设计的通用计算程序     

Liu Ding-fu 《湖北农学院学报》1991,(2)

北卡罗来纳设计Ⅰ、Ⅱ和Ⅲ资料的分析,在统计学上均为两向分类方差分析。NCⅠ为系统分类,NCⅡ为交叉式分类,NCⅢ是NCⅡ母本数为2的特例。本文应用正交变换方法进行平方和分解,编制出了这3种分析的通用计算程序。该程序适于这3种设计的完全随机或随机区组试验资料的分析,程序给出方差分析的结果、方差分量和遗传参数的估值。  相似文献