Functions of the correlative analysis , multiple linear regression method and stepwise regression method in identifying environment - affecting factors were compared . with baiyin city of gansu province as an example for analysis , the three methods were used to identify environment - affecting factors of heavy metal pollution of the soil - crop system in the suburbs of the city . based on results of the experiment , indexes were proposed for selecting plans for remedying contaminated soils in the region under research 我国北部中小城市采暖锅炉的使用比较普遍,锅炉烟尘监测仍然是一项主要的大气污染源监测之一.该项监测必须具备一定的专业技术知识和实践经验,初学者不易全面掌握.结合多年的监测实践经验,阐述监测采样中的一些问题和对异常情况的分析
The variable bandwidth local linear regression method we used in this paper have the advantages of both the local linear regression method and the variable bandwidth idea . the variable bandwidth henced the flexibility of the estimation . and it make this method can fit the spacial complex curve very well . and the asymptotic results of the estimation found the theoretic base for find the best variable bandwidth and drive the pratical best variable bandwidth from data directly 本文所用的变窗宽局部线性回归方法,继承了局部线性回归的优点,并且使用变窗宽提高了所得估计的可塑性。并使之能成功地处理空间非齐次曲线等复杂形状的曲线拟合问题。所得估计的渐近结果为求渐近最优窗宽方案以及直接从数据估计最优变窗宽提供了理论基础。
Thirdly , the short - term and long - term financial early - warning system is established based on the financial statements of marketing corporation in electric power , medicine and general merchandise . systematic method , efficiency coefficient method and linear regression method are applied in the short - term financial early - warning system from the aspect of cash flow , operating performance and function model ; growth periods method and management grade method are applied in the long - term financial earl y - warning system from the aspect of growing capability and financial stratagem . finally , lots of examples are given to validate these early - warning models , and some countermeasures are discussed for avoiding and eliminating the distress of enterprise 首先,介绍了企业财务预警的概念、功能和国内外的研究现状;其次,阐明了企业财务预警的原理、程序和方法;再次,它以电力、医药和百货行业的上市公司报表为资料,按照指标选取、标准判断、警限设置和警度预报的步骤,从企业的现金流量、财务业绩和函数模型三方面,分别运用系统化方法、功效系数法和线性回归法构建了企业短期财务预警系统,从企业的成长能力和财务战略两方面,分别运用周期波动法和管理评分法构建了企业长期财务预警系统;最后,举了大量实例对构建的各个预警模型进行考证,并从财务角度探讨了企业的防警和排警对策。
To take full advantage of corporate data collected in territory management and give full play to their value , the author also adopted some management accounting tools in this article to probe into these data more deeply . for example , the author adopted the multivariable linear regression method to forecast sales and the principal component analysis method to assess territory market , etc 为了对区域管理获得的公司数据资源进行充分合理的利用,使之发挥最大价值为公司所用,在本文中作者还运用了一些管理统计工具对这些数据进行了更深入的挖掘,如用多元线性回归方法进行销售预测、用主成分分析方法对区域市场进行评估等。
Functions of the correlative analysis , multiple linear regression method and stepwise regression method in identifying environment - affecting factors were compared . with baiyin city of gansu province as an example for analysis , the three methods were used to identify environment - affecting factors of heavy metal pollution of the soil - crop system in the suburbs of the city . based on results of the experiment , indexes were proposed for selecting plans for remedying contaminated soils in the region under research 随着我国汽车保有量的不断提高,汽车排放污染物对大气环境的影响已经引起人们的广泛重视,并采用各种各样的方法进行治理,国家有关部门也为此制订了相关的标准和法规.本文简单介绍汽车排放污染物及其检测方面的基本知识
Functions of the correlative analysis , multiple linear regression method and stepwise regression method in identifying environment - affecting factors were compared . with baiyin city of gansu province as an example for analysis , the three methods were used to identify environment - affecting factors of heavy metal pollution of the soil - crop system in the suburbs of the city . based on results of the experiment , indexes were proposed for selecting plans for remedying contaminated soils in the region under research 通过对安徽省辖淮河流域7月份汛期的水质监测结果进行主要污染物浓度及流量之间的变化趋势初步分析,结果表明,汛期淮河流域整体水质状况有所改善;干流污染物浓度与流量存在相关.汛早期受面源污染影响较为明显,中、后期受点源污染为主;支流污染物浓度与流量之间相关不显著,主要受点源排污影响
On this basis , adopt the plural linear regression method , regard peasant ' s per capita income as the dependent variable , per capita agricultural land area , unit agricultural land area chemical fertilizer use amount , agriculture total value account for gdp proportion and land degradation the index data ( land degradation fictitious variable , land degradation percentage and land degradation the array variable of the degree ) as the independent variable 在此基础上,采用多元线性回归方法,以农民人均收入为因变量,人均农业用地面积、单位农业用地面积化肥使用量、第一产业总值占gdp比例和土地退化指标(土地退化与否的虚拟变量、土地退化百分比和土地退化程度的序列变量)为自变量来分析。