输气管道缺陷尺寸定量化及其概率分布特性研究

通过对四川某输气管道现场采样管段的室内缺陷探测，建立了以现场采样，无损检测、切检测拉断和缺陷尺寸测试为主要过程的缺陷探测和尺寸定量化方法。对采样管段探测结果表明，管子内焊耻存在严重的表面裂纹，裂纹平均深度为１．９１ｍｍ，最大深度为３．８５ｍｍ，采用了正态分布，对数正态和威布尔分布拟合缺陷尺寸的概率分布规律，结果表明裂纹深度α最接近正态分布。     

基于RETE算法的速生丰产林培育知识系统的设计

本文应用实现产生式系统的高效模式匹配算法—RETE算法,分析设计了速生丰产林生长培育知识系统。该系统的特点是使用相似性方法来处理模糊问题,能够较为理想地实现速生丰产林生长培育过程中的推理机制。     

Technology of the Rapid Prototyping Manufacturing Precision of Thin-shell Part

To the photo-solidification rapid prototyping technology, the precision of parts relate directly to their size and structural characteristics, not to their complexity. However, variant prototyping processes bring about variant surface shapes and dimension precisions. The authors compare its prototyping precision and prototyping time by testing a thin-shell exterior trimming part at variant laying angles and under variant bracing conditions. And then reduced model is founded, warping deformation of variant bracing diaphragms and sheet metals at optima laying angle are surveyed, finally the process to upraise the rapid prototyping precision of the thin shell parts is set up. Experiments are then done to test the process.     

Comparison of leaf and pod disease reactions of beans (Phaseolus vulgaris L.) inoculated by different methods with strains of Xanthomonas campestris pv. Phaseoli (Smith) dye

Summary Common blight disease in beans (Phaseolus vulgaris), caused by the bacterium Xanthomonas campestris pv. phaseoli, reduces crop yield and seed quality. Information is needed on the variation of leaves and pods disease reaction to strains of the bacterium after different inoculation methods. Phaseolus vulgaris cultivars Red Kidney Charlevoix, GN Harris, GN 1140, and GN Emerson were inoculated with three different strains of Xanthomonas campestris pv. phaseoli at two inoculum concentrations (10⁸ and 10⁶ bacterial cells/ml) using water soaking, multiple needle, and razor blade inoculation on leaves, and razor blade scratch, dissecting needle, and razor blade cut inoculation on pods. Differential cultivar disease reactions of leaves, pods, or both to the bacterial strains were observed in some cases. Significant interactions among cultivars, inoculation methods, strains, and inoculum concentrations (leaves) were found. A rapid leaf chlorosis developed 6 to 7 days after inoculation. Strains of bacteria did not show specificity in inducing this reaction, but rapid leaf chlorosis was associated with high inoculum concentration and with the water soaking and multiple needle methods. Another experiment was conducted to count the number of living bacterial cells deposited in the leaf tissue after inoculation by different methods. The number of bacteria deposited by water soaking or multiple needle was higher than that deposited by razor blade.Published as Paper No. 8584, Journal Series, Nebraska Agricultural Experiment Station. Research was conducted under Project No. 20–36.     

A Rapid Test Procedure for Estimating the Amylose Content of Pea Starch *)

Rapid estimation of the amylose content of pea starch is of particular importance in breeding for pea starches high in amylose. An amylose test for starch in fresh potato tubers was adapted for use with high-amylose pea flour. Wavelengths for photometric detection were slightly changed, and the iodine concentration could be reduced. Defatting of the flour was not necessary. Reproducibility of the analyses was good (s% <3; n = 95). Variability of amylose content was investigated for different potato, barley and pea varieties. An analysis of the F4-generation of a crossing experiment with peas underlined the specific suitability of this rapid test method for supporting breeders' activities.     

观赏性小苹果“特丽”的组织培养及快速繁殖技术

以MS为基本培养基，以观赏性小苹果“特丽”的茎段为外植体，建立了无菌培养体系，研究了不同的激素配比和不同茎段类型对增殖培养的影响以及不同的生长素组合对试管苗生根的影响。结果表明：MS+BA0.5 mg/L~2.0mg/L+NAA0.1mg/L均为适合的芽萌发培养基；MS+BA1.5mg/L+IBA0.1mg/L是最适合的茎段增殖培养基；继代增殖培养取留顶芽无侧芽和去顶芽带有1~2个侧芽两种类型的茎段有利于提高增殖系数；1/2MS+0.2mg/L IAA是最佳生根培养基。试管苗增殖系数达到5.6，生根率达91.9%。     

机器视觉系统在桔瓣质量检测中的应用

开发了一套罐装线实时在线质量检测视觉系统，用于装罐前桔瓣上头发等细长形杂质检测，以保证产品质量。硬件系统采用了6台彩色CCD摄像头，两台计算机的处理结构。软件系统依据杂质和背景在颜色分布及形状大小等特征上的差异进行分离，其核心是一种用于二值图像特征区域提取的新型连通算子—面积重构算子，利用该算子平滑图像时不破坏对象轮廓完整的优点，结合改进的区域生长、区域消减等算法，形成了一套完整的检测算法。试验显示系统处理能力约30片/s，错误率仅2%。该系统能满足实时生产准确性和在线处理的要求，为其实用化、商品化奠定了基础。     

深圳市抛石填海强夯地基的瑞雷波法检测

介绍了瑞雷波勘探的基本原理和工作方法及瑞雷波勘探在抛石填海强夯地基检测中的实际应用。瑞雷波法能全面、直观和快速地检测强夯地基的加固效果，缩短地基检测周期。     

遥感影像在占用征用林地检查中的应用探讨

利用遥感影像对内蒙古自治区南木林业局、林西县、杭锦旗占用征用林地情况进行了检查,分析了遥感影像变化与林地变化的关系,并对应用遥感技术提高林地检查精度进行了探讨。     

台湾榕组织培养快速繁殖技术研究

文章对台湾榕组织培养快繁育苗技术进行研究,结果表明:在MS培养基中添加6-BA 1.0,2.0mg/L和NAA 0.1 mg/L有利于丛生芽的诱导和增殖;添加6-BA 1.5 mg/L和NAA 0.1 mg/L适合于丛生芽的继代增殖培养;培养基中添加IBA 1.0 mg/L和NAA 0.1 mg/L有利于小苗生根和植株...