Nâng cao tính kỵ nước và chống tia uv cho gỗ Bồ đề Styrax tonkinensis bằng công nghệ phủ ZnO - 19



Ký hiệu

Sau khi chiếu UV 0h

Sau khi chiếu UV 6h

Sau khi chiếu UV 24h

L*

a*

b*

L*

a*

b*

L*

a*

b*

W-ZnO-01

80.62

4.97

35.3

80.23

4.29

31.6

78.12

5.65

32.51

W-ZnO-02

80.96

4.81

34.91

80.52

3.96

30.36

78.63

5.29

31.61

W-ZnO-03

80.62

4.48

29.6

79.94

4.29

27.56

77.38

5.36

28.16

W-ZnO-04

80.42

4.56

28.53

79.52

4.29

26.13

77.95

5.22

27.13

W-ZnO-05

80.42

4.56

28.53

79.52

4.29

26.13

77.95

5.22

27.13

ĐC-01

82.78

1.75

16.81

78.53

2.93

27.15

75.50

4.94

33.04

ĐC-02

80.08

2.45

17.14

73.02

3.67

27.56

75.14

4.75

31.14

ĐC-03

81.28

2.23

17.68

77.03

3.58

27.33

74.75

5.41

32.80

ĐC-04

83.88

1.68

16.61

79.16

3.10

27.25

76.90

4.61

32.16

ĐC-05

81.50

2.29

16.46

77.62

3.57

26.63

75.87

4.97

31.72

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Nâng cao tính kỵ nước và chống tia uv cho gỗ Bồ đề Styrax tonkinensis bằng công nghệ phủ ZnO - 19



Ký hiệu

Sau khi chiếu UV 48h

Sau khi chiếu UV 72h

Sau khi chiếu UV 96h

L*

a*

b*

L*

a*

b*

L*

a*

b*

W-ZnO-01

78.47

6.05

31.7

78.54

6.38

31.1

78.72

6.14

30.14

W-ZnO-02

78.75

5.8

31.23

78.92

6.2

30.85

79.04

6.08

29.96

W-ZnO-03

78.25

5.72

27.94

78.37

5.89

27.35

78.57

5.61

26.21

W-ZnO-04

79.09

5.33

26.53

78.45

5.66

25.93

78.75

5.46

25.06

W-ZnO-05

79.09

5.33

26.53

78.45

5.66

25.93

78.75

5.46

25.06

ĐC-01

76.29

5.26

33.87

76.24

5.66

34.46

76.12

5.79

35.02

ĐC-02

74.42

5.39

32.77

74.13

5.97

33.41

73.80

6.05

34.10

ĐC-03

75.36

5.61

33.64

74.53

6.10

34.50

74.49

6.17

34.95

ĐC-04

75.71

5.18

33.97

76.73

5.71

34.63

76.24

5.80

35.29

ĐC-05

75.80

5.36

32.90

76.53

5.66

32.84

75.70

5.81

34.08



Ký hiệu

Sau khi chiếu UV 144h

Sau khi chiếu UV 192h

Sau khi chiếu UV 240h

L*

a*

b*

L*

a*

b*

L*

a*

b*

W-ZnO-01

78.76

6.52

27.36

79.16

6.43

28.35

79.42

6.31

27.68

W-ZnO-02

78.95

6.35

29.09

79.19

6.32

28.26

79.75

6.17

27.42

W-ZnO-03

78.72

5.76

25.34

79.03

5.62

24.25

79.04

5.53

23.55

W-ZnO-04

78.94

5.58

24.25

79.32

5.43

23.35

79.51

5.41

22.78

W-ZnO-05

78.94

5.58

24.25

79.32

5.43

23.35

79.51

5.41

22.78

ĐC-01

75.86

6.14

35.61

76.21

6.20

36.02

75.93

6.42

36.17

ĐC-02

74.30

6.18

34.78

74.29

6.40

35.60

74.08

6.62

35.87

ĐC-03

75.89

6.06

34.98

74.95

6.64

35.63

74.85

6.71

36.16

ĐC-04

76.91

5.78

34.92

77.35

5.73

35.08

77.65

5.73

35.44

ĐC-05

75.21

6.23

35.20

76.01

6.08

35.44

75.60

6.60

36.14



Ký hiệu

Sau khi chiếu UV 312h

Sau khi chiếu UV 384h

Sau khi chiếu UV 456h

L*

a*

b*

L*

a*

b*

L*

a*

b*

W-ZnO-01

80.79

6.33

25.9

81.43

6.26

25.47

80.04

6.1

24.8

W-ZnO-02

80.99

6.06

25.62

80.43

6.19

25.53

80.95

6.02

24.87

W-ZnO-03

80.14

5.71

22.28

80.05

5.56

21.45

80.58

5.36

20.92

W-ZnO-04

80.18

5.62

21.78

80.27

5.53

20.99

80.75

5.26

20.4

W-ZnO-05

80.18

5.62

21.78

80.27

5.53

20.99

80.75

5.26

20.4

ĐC-01

75.56

6.81

36.45

75.16

6.85

36.58

75.64

7.01

37.31

ĐC-02

73.90

7.18

36.25

73.97

7.26

36.51

73.48

7.60

37.13

ĐC-03

73.67

7.37

36.34

73.60

7.54

36.18

73.80

7.33

36.73

ĐC-04

76.59

6.67

36.18

74.83

7.12

36.39

74.43

7.13

37.42

ĐC-05

75.02

7.40

36.51

74.89

7.51

36.62

75.18

7.49

37.32



Ký hiệu

Sau khi chiếu UV 528h

Sau khi chiếu UV 600h

Sau khi chiếu UV 672h

L*

a*

b*

L*

a*

b*

L*

a*

b*

W-ZnO-01

81.57

6.04

24.17

81.34

5.94

23.18

81.35

6.22

22.99

W-ZnO-02

81.58

5.78

24.64

81.37

5.79

23.67

81.53

6.13

23.33

W-ZnO-03

81.29

5.21

20.53

80.7

5.3

19.64

81.04

5.58

19.38

W-ZnO-04

81.38

5.19

20.08

80.93

5.16

19.39

81.09

5.44

19.01

W-ZnO-05

81.38

5.19

20.08

80.93

5.16

19.39

81.09

5.44

19.01

ĐC-01

75.61

7.46

37.90

74.43

7.54

38.04

74.49

7.96

37.91

ĐC-02

73.27

7.99

37.49

72.71

7.90

37.50

72.69

8.71

37.93

ĐC-03

75.30

7.35

36.76

72.90

7.66

36.91

73.55

8.17

36.99

ĐC-04

76.23

7.01

37.32

74.24

7.26

37.75

76.14

7.34

36.99

ĐC-05

75.13

7.80

37.94

74.02

8.13

38.46

73.92

8.69

38.51



Ký hiệu

Sau khi chiếu UV 744h

Sau khi chiếu UV 816h

Sau khi chiếu UV 888h

L*

a*

b*

L*

a*

b*

L*

a*

b*

W-ZnO-01

81.55

6.05

22.31

81.64

6.21

21.39

81.61

6.22

21.02

W-ZnO-02

81.67

5.95

22.56

81.79

6.09

21.8

81.77

6.14

21.3

W-ZnO-03

80.97

5.52

18.97

80.91

5.61

18.11

81.41

5.41

18.25

W-ZnO-04

81.12

5.44

18.69

81.22

5.53

18.05

81.29

5.5

17.98

W-ZnO-05

81.12

5.44

18.69

81.22

5.53

18.05

81.29

5.5

17.98

ĐC-01

73.84

8.28

38.44

73.37

8.52

38.76

73.45

8.60

39.06

ĐC-02

72.25

8.76

37.92

71.32

9.21

38.14

72.11

8.43

37.28

ĐC-03

72.13

8.42

37.40

72.01

8.52

37.23

73.44

7.70

37.98

ĐC-04

74.72

7.50

37.43

73.57

7.83

37.93

71.73

9.20

38.32

ĐC-05

73.25

9.03

39.06

72.39

9.30

39.18

72.75

9.19

39.29


ANOVA for Quadratic model

Response 1: WCA

Source Sum of Squares df Mean Square F-value p-value


Model

625.48

5

125.10

9.98

0.0044

significant

A-C

89.56

1

89.56

7.14

0.0319


B-t

416.63

1

416.63

33.23

0.0007


AB

4.08

1

4.08

0.3255

0.5862


22.60

1

22.60

1.80

0.2213


103.25

1

103.25

8.24

0.0240


Residual

87.76

7

12.54




Lack of Fit

78.93

3

26.31

11.92

0.0183

significant

Pure Error

8.83

4

2.21




Cor Total

713.24

12





Factor coding is Coded. Sum of squares is Type III - Partial

The Model F-value of 9.98 implies the model is significant. There is only a 0.44% chance that an F-value this large could occur due to noise.

P-values less than 0.0500 indicate model terms are significant. In this case A, B, B² are significant model terms. Values greater than 0.1000 indicate the model terms are not significant. If there are many insignificant model terms (not counting those required to support hierarchy), model reduction may improve your model.

The Lack of Fit F-value of 11.92 implies the Lack of Fit is significant. There is only a 1.83% chance that a Lack of Fit F-value this large could occur due to noise. Significant lack of fit is bad -- we want the model to fit.


Fit Statistics


Std. Dev. 3.54

0.8770

Mean 145.56

Adjusted R²

0.7891

C.V. % 2.43

Predicted R²

0.1937

Adeq Precision 9.0660

The Predicted R² of 0.1937 is not as close to the Adjusted R² of 0.7891 as one might normally expect; i.e. the difference is more than 0.2. This may indicate a large block effect or a possible problem with your model and/or data. Things to consider are model reduction, response transformation, outliers, etc. All empirical models should be tested by doing confirmation runs.

Adeq Precision measures the signal to noise ratio. A ratio greater than 4 is desirable. Your ratio of 9.066 indicates an adequate signal. This model can be used to navigate the design space.


Final Equation in Terms of Actual Factors

WCA =

+57.36746

+34.38188 C

+0.556026 t

-0.033667 C * t

-7.21000 C²

-0.001070 t²

The equation in terms of actual factors can be used to make predictions about the response for given levels of each factor. Here, the levels should be specified in the original units for each factor. This equation should not be used to determine the relative impact of each factor because the coefficients are scaled to accommodate the units of each factor and the intercept is not at the center of the design space.


Coefficients in Terms of Coded Factors

Factor Coefficient Estimate df Standard Error 95% CI Low 95% CI High VIF


Intercept

149.04

1

1.58

145.30

152.78


A-C

3.35

1

1.25

0.3857

6.31

1.0000

B-t

7.22

1

1.25

4.26

10.18

1.0000

AB

-1.01

1

1.77

-5.20

3.18

1.0000

-1.80

1

1.34

-4.98

1.37

1.02

-3.85

1

1.34

-7.03

-0.6780

1.02

The coefficient estimate represents the expected change in response per unit change in factor value when all remaining factors are held constant. The intercept in an orthogonal design is the overall average response of all the runs. The coefficients are adjustments around that average based on the factor settings. When the factors are orthogonal the VIFs are 1; VIFs greater than 1 indicate multi-colinearity, the higher the VIF the more severe the correlation of factors. As a rough rule, VIFs less than 10 are tolerable.

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