Multi-linear regression model of Fixed Assets Investment in Heilongjiang Province in China

2010 ◽  
Author(s):  
Wang Zhihao ◽  
Wang Wei ◽  
Gu Zhengbing
Keyword(s):  
Linear Regression ◽  
Regression Model ◽  
Linear Regression Model ◽  
Heilongjiang Province ◽  
Fixed Assets ◽  
Multi Linear Regression

scholarly journals A Multi Linear Regression Model to Derive Dust PM10 in the Sahel Using AERONET Aerosol Optical Depth and CALIOP Aerosol Layer Products

2020 ◽  
Vol 12 (18) ◽  
pp. 3099
Author(s):  
Jean-François Léon ◽  
Nadège Martiny ◽  
Sébastien Merlet
Keyword(s):  
Linear Regression ◽  
Regression Model ◽  
Aerosol Optical Depth ◽  
Optical Depth ◽  
Linear Regression Model ◽  
Population Exposure ◽  
Aerosol Layer ◽  
Multi Linear Regression ◽  
Sun Photometer ◽  
The Impact

Due to a limited number of monitoring stations in Western Africa, the impact of mineral dust on PM10 surface concentrations is still poorly known. We propose a new method to retrieve PM10 dust surface concentrations from sun photometer aerosol optical depth (AOD) and CALIPSO/CALIOP Level 2 aerosol layer products. The method is based on a multi linear regression model that is trained using co-located PM10, AERONET and CALIOP observations at 3 different locations in the Sahel. In addition to the sun photometer AOD, the regression model uses the CALIOP-derived base and top altitude of the lowermost dust layer, its AOD, the columnar total and columnar dust AOD. Due to the low revisit period of the CALIPSO satellite, the monthly mean annual cycles of the parameters are used as predictor variables rather than instantaneous observations. The regression model improves the correlation coefficient between monthly mean PM10 and AOD from 0.15 (AERONET AOD only) to 0.75 (AERONET AOD and CALIOP parameters). The respective high and low PM10 concentration during the winter dry season and summer season are well produced. Days with surface PM10 above 100 μg/m3 are better identified when using the CALIOP parameters in the multi linear regression model. The number of true positives (actual and predicted concentrations above the threshold) is increased and leads to an improvement in the classification sensitivity (recall) by a factor 1.8. Our methodology can be extrapolated to the whole Sahel area provided that satellite derived AOD maps are used in order to create a new dataset on population exposure to dust events in this area.

scholarly journals The Prediction of Engel's Coefficient and Education Expenditure Based on the Linear Regression Model for Heilongjiang and Ontario

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Jinjin Yang
Keyword(s):  
Linear Regression ◽  
Regression Model ◽  
Linear Regression Model ◽  
Household Expenditure ◽  
Heilongjiang Province ◽  
Education Expenditure ◽  
Increasing Trend ◽  
Food Expenditure

It is meaningful to study trends in food and education expenditure as proportions of total household expenditure. In this study, based on year 2006 to 2017 data from Heilongjiang province in China and Ontario province in Canada, a linear regression model is used to forecast the Engel’s coefficients (proportion spent on food) and the education proportion from year 2018 to 2027 for those two regions. The results suggest that in both regions the Engel’s coefficients show a decreasing trend, while the education expenditure proportions show an increasing trend. The ratios of education expenditure to food expenditure in both places show an increasing trend.

scholarly journals Multi-linear regression model for chlorine consumption by waters

2020 ◽  
Vol 26 (4) ◽  
pp. 200402-0
Author(s):  
Guocheng Zhu ◽  
Shanshan Zhang ◽  
Yongning Bian ◽  
Andrew S Hursthouse
Keyword(s):  
Water Quality ◽  
Linear Regression ◽  
Regression Model ◽  
Linear Regression Model ◽  
Drinking Water Treatment ◽  
Model Combination ◽  
Water Matrix ◽  
Matrix Properties ◽  
Multi Linear Regression ◽  
The Relationship

In drinking water treatment, disinfection is a key step to ensure the safety of water quality and people's health but little is known of the relationship between chlorine consumption and water matrix properties from varied sources (BWM). In this study, we measured the fluorescence from fractions of NOM (FFN) for the relevant BWM. This included the evaluation of three components: the chlorine-dependence factor (CDF) (DOC and NH3-N), the BWM (such as NO3<sup>-</sup>, NO2<sup>-</sup> and turbidity), and FFN (I-V fluorescence fractions). Multi-linear regression model was used to fit the data. Results showed that when using the CDF, BWM and FNN, in the prediction of chlorine consumption showed the (R<sup>2</sup>) values were 0.72, 0.71 and 0.41, respectively. While the FNN did not fit the model well it did enhance the model using CDF by 11.26%. The FNN is not effective in enhancement of the BWM response to the model. Combination of the CDF, BWM and FNN or that of the CDF and BWM were both effective in prediction of chlorine consumption.

Estimating severity of sideways fall using a generic multi linear regression model based on kinematic input variables

2017 ◽  
Vol 54 ◽  
pp. 19-25 ◽  
Author(s):  
A.M. van der Zijden ◽  
B.E. Groen ◽  
E. Tanck ◽  
B. Nienhuis ◽  
N. Verdonschot ◽  
...  
Keyword(s):  
Linear Regression ◽  
Regression Model ◽  
Linear Regression Model ◽  
Model Based ◽  
Multi Linear Regression ◽  
Input Variables ◽  
Sideways Fall
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