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通过对崔庄煤矿矿井水文地质条件分析认为,该矿井属于以静储量为主,以孔隙含水层充水特征的简单类型.预计矿井正常涌水量-250m水平为131.95m3/h,-400m水平为162.02m3/h;最大涌水量为324m3/h. 相似文献
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油样品的可变角同步荧光光谱的计算机模拟 总被引:1,自引:0,他引:1
可变角同步荧光法(VASF)是在三维荧光光谱和同步荧光光谱的基础上发展起来的1种特殊形式的荧光光谱,在用于光谱相互重叠的多种组分的同时分析中,取得了很好的效果。文中基于实验得到的原油样品三维荧光光谱数据EEM(excitation-emission matrix),引入二维三次卷积插值,通过Matlab软件实现了对所选扫描路径中各数据点的荧光强度值的获取,编写了用于模拟所选扫描路径下的可变角同步荧光光谱VASFS(Variable-angle synchronous fluorescence spectrum)的VAS-FS程序。此程序为三维荧光光谱和可变角同步荧光光谱的获取和分析提供了1种模拟方法,也为可变角荧光分析中最优扫描路径的选取提供了1种快捷、方便的途径。 相似文献
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通过对崔庄煤矿矿井水文地质条件分析认为,该矿井属于以静储量为主,以孔隙含水层充水特征的简单类型。预计矿井正常涌水量-250m水平为131.95m^3/h,一400m水平为162.02m^3/h;最大涌水量为324m^3/h。 相似文献
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钻探工程中,经常出现硬质合金块碎裂或脱落的问题,除地层结构等的影响和使用钻具不当外,硬质合金钻头的焊接质量不高是一个重要原因.因此,提高硬质合金钻头的焊接质量,改进钻头焊接工艺十分必要.由于硬质合金较脆,导热性差,热后收缩率大,如果焊接不当,便会引起内应力增大而造成裂纹. 相似文献
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随着PDC钻头的推广使用,传统的岩屑录井方法已难以分析如此细小的岩屑。基于数字图像处理技术对岩屑分类识别技术进行研究,首先利用和差直方图统计方法对岩屑进行纹理特征分析和提取,接着运用贝叶斯分类器进行分类识别,实验结果表明,此统计特征提取方法对于大部分岩屑可以很好地获取其主要特征,并最终取得理想的识别结果。此技术的发展将提高现场录井人员的工作效率和识别准确率。 相似文献
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Fenneropenaeus chinensis distributed in the Yellow Sea and Bohai Sea of China and the west coast of the Korean Peninsula. Different geographical populations represent potentially different genetic resources. To learn further the characteristics of different geographical population, crosses among two wild and three farmed populations were produced. The two wild populations were from the Yellow Sea and Bohai Sea (WYP), and the west coast of the Korean Peninsula and coast (WKN). The three farmed populations included the offspring of first generation of wild shrimp from coast in Korea (FKN), the Huang Hai (the Yellow Sea in Chinese) No. 1 (HH 1), and JK98. The phenotypes growth and survival rates of these populations were compared to confirm the feasibility for crossbreeding. The body length (BL), carapace length (CL), carapace width (CW), height of the second and third abdominal segment (HST), width of the second and third abdominal segment (WST), length of the first abdominal segment (LF), length of the last abdominal segment (LL), live body weight (BW), and survival rate were measured. Different combinations were statistically performed with ANOVA and Duncan's Multiple significant difference (P<0.05) in BL, CL, HST, LL, and BW; and insignificant difference (P0.05) in other growth traits and survival rate. The results of Duncan's Multiple Range Test are that BL and CL of was the best combination in all growth traits. Therefore, hybridization can introduce the variation to base populations. The systematic selection program based on additive genetic performance may be more effective than crossbreeding. 相似文献
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基于LIBSVM的石油录井中岩屑岩性识别方法研究 总被引:3,自引:0,他引:3
针对在PDC钻头条件下石油录井过程中的岩屑岩性难以用肉眼识别,以及传统分类器准确率低的问题,该文利用和差直方图变换、傅里叶变换、Gabor变换3种不同的岩屑图像特征提取技术,将岩屑样品进行特征提取,并设定LIBSVM分类器的分类参数,根据得到的岩性识别率的高低来确定最优的参数组合。结果表明,SVM设置类型上选择NU_SVC、核函数选择RBF、分类参数gamma设置为0.1、nu设置为0.11的参数组合可获得较高的岩性识别率。其中采用Gabor特征提取方式和LIBSVM分类器对现场岩屑样品进行测试,获得的岩性识别率最高,对现场泥岩和砂岩的平均识别率分别为95%和90%。与神经网络分类器分类结果比较,该方法能更好地分析岩屑的岩性,可望在现场得以推广应用。 相似文献