汉中四种干果中脂肪酸含量测定

利用索氏提取仪提取葵花籽、花生、核桃、华山松籽四种果实中的粗脂肪,然后采用气相色谱法(GC)分析其脂肪酸组成。在四种干果中,核桃的粗脂肪含量最高,为74.3%。四种干果样品中共识别出11种脂肪酸,主要有四种:油酸、亚油酸、棕榈酸和硬脂酸,其中油酸和亚油酸相对含量较高,分别是20.1%,49.0%;39.3%,36.2%;17.3%,64.8%;22.0%,47.5%。花生中油酸、棕榈酸、山嵛酸和樵油酸相对含量是39.3%、11.0%、3.2%和1.3%,高于其它三种干果,特别是棕榈酸、山嵛酸和樵油酸。核桃中的亚油酸和亚麻酸相对含量是64.8%和8.5%,明显高于其它三种干果。另外,核桃的不饱和脂肪酸相对含量在四种干果中最高,为90.8%。通过本实验可了解四种干果中脂肪酸的种类及相对含量,特别是其中必需脂肪酸的相对含量,为四种干果深入加工利用提供参考。     

EPQ量表与哈萨克族大学生的神经类型特征

运用EPQ量表对哈萨克族大学生的神经类型进行测量评价研究,为探讨少数民族身心健康和神经类型特征提供科学的理论参考;为推动各民族传统体育项目的发展提出参照的心理统计量指标数据.     

煤矿复杂多源数据的混合相似性度量方法

随着煤矿产业自动化、电子化和信息化的发展，目前已有的数据描述方式不能有效刻画煤矿中多源、多维、动态的海量数据信息．针对该问题，首先将源于哲学范畴中的本体引入煤矿生产领域，以矿区监测位置本体作为语义模型与数值描述相结合，形成树状层次结构来描述煤矿复杂多源数据；然后，通过基于语义和数值的混合相似性度量方法计算煤矿数据的相似度；最后通过实验验证了本文所述方法的可行性和有效性．     

A Statistical Method for Analysis of Technical Data of a Badminton Match Based on 2-D Seriate Images

The use of computer vision technology to collect and analyze statistics during badminton matches or training sessions can be expected to provide valuable information to help coaches to determine which tactics should be used by a player in a given game or to improve the player＇s tactical training. A method based on 2-D seriate images by which statistical data of a badminton match can be obtained is presented. Image capture and analysis were performed synchronously using a multithreading technique. The regions of movement in the images were detected using a temporal difference method, and the trajectories of the movement regions were analyzed using sedate images. The shuttlecock trajectory was extracted from all detected trajectories using various characteristic parameters. The stroke type was determined by comparing the shuttlecock trajectory data with a set of stroke definition data. The algorithm was tested at a training center, and the results were compared with baseline data obtained by expert visual inspection using four video samples, which included approximately 10 000 frames. The shuttlecock trajectory and stroke type were detected correctly in almost 100% of the analyzed video sequences. The average speed of the automated analysis was approximately 40 frames/s, indicating that the method can be used for real-time analysis during a badminton match. The system is convenient for use by a sports coach.     

A thermal insulation method for a piezoelectric transducer

This study deals with the sources of signal distortion of a piezoelectric transducer heated by measured gas flow. These signal distortions originate from both unloading of preload on a piezocrystal because of expansion of a diaphragm in the test apparatus and the pyroelectric effect of a heated piezoelectric crystal. A plastic film on the diaphragm of the transducer can effectively insulate the diaphragm and the piezocrystal within transducer from heating by gas flow, eliminating the sources of distortion. A method for evaluating the thickness of the film is proposed.     

电阻应变测量技术在压力容器检验中的应用

介绍了电阻应变测量技术的测试原理和测试方法，并结合化工企业对压力容器检验的技术要求，应用电阻应变测量技术对典型压力容器作出了应力分析和安全评定。     

基于广义回归神经网络的交流电磁场检测裂纹量化研究

考虑到目前交流电磁场检测中裂纹量化精度和智能化水平的不足,将广义回归神经网络(GRNN)引入到交流电磁场检测技术中来,在有限元仿真试验基础上,选择了作为输入元素的交流电磁场信号特征向量,构建了一种适合于交流电磁场检测裂纹量化分析的GRNN模型,并利用归一化处理后的一些离散数据作为网络的训练和检测样本,使网络完成对整个裂纹交流电磁场范围内的主要信息的存储,从中发现输出和输入之间的内在关系,完成对未知点的预测。结果表明,与传统的线性插值方法以及BP网络相比,该方法建模简单,预测精度高,对原始数据的分布和边界条件无特别要求,推广性能强,人为调节参数少,收敛速度快,更为智能化,尤其在获得已知样本稀少的情况下仍能表现出极强的适应性,从而保证了模型的精度和推广性能,为交流电磁场检测裂纹量化提供了一种智能高效的方法。     

提高测量精度方法探讨

测量工作是一项精而细的工作,在精度方面尤为重要,精度的高低直接决定着矿井的安全生产,因此提高测量精度,减少测量工作量是测量工作中需要研究解决的问题。文章介绍了一种在导线测量中,既能提高测量精度,又能减少工作量的方法——边角分测法。     

Cu-11Fe-4Cr原位复合材料在HSO^-3和／或C1^-介质中的耐蚀性

采用选择腐蚀技术，提取了Cu-11Fe-4Cr原位复合材料中Fe-Cr纤维，并测定了其电极电位。通过间歇式盐水喷雾实验和极化曲线测定，研究了Cu-11Fe-4Cr原位复合材料在HSO^-3和／或C1^-介质中的腐蚀行为。用扫描电镜对腐蚀产物和腐蚀表面进行分析。结果表明，Cu-11Fe-4Cr原位复合材料中，E（Cu）〈E（Fe-Cr），故Cu基体为阳极，而第二相Fe-Cr纤维为阴极。Cu-11Fe-4Cr原位复合材料在（NaHS03＋NaC1）和NaHS03介质中的E（Fe-Cr）-E（Cu）显著高于NaC1介质中的E（Fe-Cr）-E（Cu），Cu-11Fe-4Cr原位复合材料在NaC1介质中的腐蚀失重最小，在NaC1介质中具有良好的耐蚀性。     

Hysteresis of ruby fluorescent line by pressure and annealing effect

Abstract

Accuracy of hydrostatic pressure measurement in a diamond-anvil cell (DAC) depends on the reproducibility of ruby RI fluorescent measurement. The larger scatter in R, fluorescent wavelength shift than the reproducibility of spectroscopic measurement was observed among appropriately mirror-finished ruby plates before setting up in DAC. The characteristics of the scatter changed after loading DAC up to pressure over hydrostatic limit. They vanished by annealing the ruby plates. These phenomena are presumably due to the appearance and disappearance of the residual stress in the ruby crystal. Such hysteresis of ruby fluorescent wavelength shift by pressure and its annealing effect are discussed.