During the fracturing of the production intervals , log data are used to calculate continuous formation stress profile parameters near oil layer , formation stress profile analysis is applied to determine fracturing execution scale and technology , fracturing software , gohfer2000 , is used to adjust execution parameters , which can optimize fracture geometry of target formation , and ensure high fracturing and stimulation efficiency 在油层压裂过程中,应用测井资料计算油层附近地层连续的应力剖面参数;用地应力剖面分析,确定压裂施工规模及施工工艺;用gohfer2000压裂软件调整施工参数,能够优化压裂目的层裂缝几何型态,保证压裂增产效果。
Firstly , the author reviews the classical articles about early - warning models in the financial - failure field . on the basis of summarize and review these research , the author selected 18 listed companies which experienced financial failure and 18 corresponding listed companies which were in formal financial conditions as the comparative examples . after the section analysis and the single - variable discriminant analysis of the financial ratios " difference of the two groups for three years before the financial failure , the author picks out some ratios as the predication variable and establishes some multi - variable models to forecast financial failure 本文通过对国内外财务失败预警模型研究领域经典文献的回顾,在对已有研究成果进行总结和评价的基础上,笔者选取了我国上市公司中18家财务失败的公司和18家财务正常的公司为样本,应用剖面分析和单变量判定分析法,研究了公司财务失败出现前3年内各年这两类公司20个财务指标的差异,并从中选定若干指标作为预测变量,应用多元统计方法构建预测财务失败的多变量模型。
First with section analysis and single variable , this essay analyzes the difference of twenty - one financial indexes between st and no st stock companies in five years basic financial data . at last , three financial crisis prediction modes are set up with six financial indexes which are the most important financial indexes in linear probability model , fisher linear analysis model and logistic analysis model 首先应用剖面分析和单变量判定分析,研究财务危机出现前5年内各年这二类公司21个财务指标的差异;最后选定6个财务指标为预警指标,应用lpm多元线性回归分析、 fisher线性判定分析和logistic回归分析三种方法,分别建立三种预测财务危机的模型。
The magnitude of these variables increased approximately ten times . it helped the rapid releasing of instability energy . the interaction of high - level and low - level mesoscale system leads to the rainstorm . the vertical cross section analysis of potential temperature tells us that rainstorm take place in the warm - moist and instability area . usually locate in the very stiff moist isentropes and it can lead to the development of vortex 通过对相当位温的垂直剖面分析,可知两场暴雨的中低层都为暖湿不稳定区,暖湿不稳定区上部冷空气明显扩散,暴雨产生在暖湿对流不稳定区内,通常产生在_ e陡峭和密集区中, _ e陡峭和密集区有利于涡旋发展。