测井曲线拐点在测井层序地层分析中的应用研究

在层序地层学研究中，层序界面的划分是基础和重要的环节，而利用测井资料分析可以进行层序界面划分和进行较长期基准面旋回识别。测井曲线的值是深度的函数，测井曲线的一阶导数表示了曲线变化的趋势和变化的快慢，在某一范围内，当一阶导数呈现符号转换时，相对应的深度点的测井值即为该范围内极大（极小）值；测井曲线的二阶导数则表示曲线的凹凸性，在某一范围内，当二阶导数呈现符号转换时，相对应的深度点代表了测井曲线的拐点，即反映曲线凹凸性变化的转折点，亦即地层的分界面。基于以上特点，提出利用测井曲线拐点进行层序界面划分的原理和方法，并结合岩心和录井资料，对白音查干凹陷达28井腾格尔组不同级次沉积旋回、地层垒积、旋回特征随沉积厚度变化特点和不同级次基准面旋回进行研究，最后得到该地层单井测井层序地层分析结果。     

1956——剧场发展的拐点

该文抓住1956年这样一个时间点,在明晰历史背景的情况下,阐述了期间发生的剧场标志性事件,其中既有对现代主义发飙的象征主义手法的运用,也有针对已有鞋盒式音乐厅提出大胆改变的葡萄园式音乐厅,也有镜框式品字型舞台形式的出现,还有从城市复兴出发的演艺中心的首次建设。这些富有实用价值和时代意义的剧场创新式发展,对于当今我国剧场建设中的复制现象,无疑有着历史借鉴和启示作用。     

Coagulation Kinetics of High Pressure Treated Acidified Milk Gel for Preparation Chhana (An Indian Soft Cottage Cheese)

Chhana, an Indian cottage cheese, is one of the most popular heat-acid coagulated milk products. It forms the base material for a variety of milk-based sweets. Application of high pressure treatment for denaturation of milk protein has successfully been carried out. In the present study, high pressure in the range of 200–400 MPa for 0 to 100 min at coagulation temperature of 30–70°C was applied at constant acidity of milk-acid mixture in order to study the coagulated milk gel properties for preparation of chhana. The experiments were conducted using a central composite rotatable experimental design. Linear and non-linear regression equations, using the coded values of the independent variables were developed to study the effect of process variables on coagulated gel properties viz., lag time, mean coagulation rate and inflexion time. The optimum values of independent variables corresponding to minimum lag time, maximum coagulation rate and minimum inflexion time was obtained were high pressure - 280 MPa; pressurization time - 47 min; and coagulation time - 52°C. At this optimum condition of independent variables the lag time, mean coagulation time and inflexion time were 0.0028 min, 3.87 min, and 5.19 min, respectively.     

改进的拐点提取法在曲线拟合中的应用

针对目前在曲线拟合中常用拐点提取法的弊端,提出一种新的拐点提取方法.其步骤包括:检测物体边缘轮廓;拟合边缘轮廓的分段直线;初步确定图像轮廓的拐点,并对所拟合的直线段进行线段合并,由此减少拐点的个数.     

VFD光电参数自动测试系统的研究

真空荧光显示（VFD）广泛应用于仪器仪表与家电等各个领域，它的光电特性的自动测试显得甚为迫切，这里提出了一种对VFD自动选型与测试的方法，以曲线拟合方式实现了对灯丝拐点电压的自动测试，为新型VFD的研制与检验提供了简单易行的工具。     

CT图像边缘退化模型的建立及其在图像尺寸测量中的应用

本文为了提高图像尺寸测量的精度,提出了基于构造边缘退化的近似函数的尺寸测量算法。该算法首先根据原图像的灰度信息以及拐点信息构造边缘退化的近似函数,并确定最佳边缘检测点,再利用这个函数对原图像进行校正,准确提取图像的边缘信息,从而完成CT图像的尺寸测量。实验表明该方法能够有效地提取CT图像边缘信息,且尺寸测量精度较高。     

综合语义和轮廓特征的图像检索技术研究

针对基于内容的图像检索系统的检索效率和精度的不足,提出了综合语义和轮廓特征的图像检索方法.以拐点作为控制点对图像的轮廓进行精确分段,利用边界跟踪法对图像进行轮廓特征提取,并以图像的语义和底层的轮廓特征作为图像检索的综合指标,将图像的主观语义和底层特征融合起来,提高了图像底层特征和高层语义之间的联系.通过对不同类型的图像进行检索,实验结果证明该算法对复杂图像检索的效率高、精度高,并具有稳定的检索性能.因此,具有很好的发展趋势.     

一种粘连颗粒图像的快速分割方法

对于工业和医学中常见的颗粒图像，提出了一种快速分割粘连颗粒的方法。利用颗粒图像的轮廓特征，找到若干拐点，从拐点中进一步提取出分割点。然后利用分割点的相互距离等因素，为每个分割点找到相匹配的分割点。连接每对分割点即可分开相粘连的颗粒。这种方法快速有效，取得了良好的效果。     

Industrial computed tomography image size measurement

As one of the most useful modern detection technologies, Industrial Computed Tomography (ICT) image size measurement can correctly non-destructively measure the size of workpieces’ inner construction, and it is considered as the standard for quality assurance and reverse engineering. In view of the advantages and disadvantages compared to conventional methods, this paper improves the precision of image size measurement with a new algorithm that uses an approximate function to describe edge degradation. First, this algorithm constructs the approximate function and determines the optimal point of edge detection, based on image intensity and inflexions. Then, in order to accurately extract the image edge, this algorithm is used to revise the primary image, completing construction of the CT image.Excellent results are obtained from simulations and experiments. The experimental results indicate that the relative error is 2% for the CT image when the step evolution of the image edge is pooled. The relative error of this method is decreased by as much as 1.5% compared to wavelet transformation and ridgelet transformation. Therefore, this new algorithm demonstrates increased effectiveness in extracting an accurate measurement of the CT image edge.     

基于栅格法的桥式起重机路径规划技术研究

原有的桥式起重机路径规划算法完全仿照智能机器人路径规划的方法,得到的最优路径在实际应用中不能满足人们的需求,自动转载消耗的时间比人工手动转载还要长。在分析桥式起重机运行系统的特点后,通过栅格法限制最优路径的转角角度,同时将路径的拐点数转换为长度,最终得到了用时最短的最优路径。通过仿真和实验,并与原有的方法相比较,证明了改进的算法能够在路径规划环节提高桥式起重机自动转载的效率。