scholarly journals The Application Research of GM (1,1) Model with X (1) (n) as Initial Value in Deformation Prediction Combined with Accumulation and Logarithm Transformation

2021 ◽  
Vol 719 (4) ◽  
pp. 042061
Author(s):  
Lijun Qiu ◽  
Bo Zhang ◽  
Zhanxue Zhou
Keyword(s):  
Application Research ◽  
Initial Value ◽  
Deformation Prediction

Application Research of Fuzzy Mathematics to the Surface Movement Deformation Prediction

2014 ◽  
Vol 962-965 ◽  
pp. 998-1002 ◽  
Author(s):  
Shao Jie Feng ◽  
Xue Fang Zhao ◽  
Ji Lv
Keyword(s):  
Underground Mining ◽  
3D Visualization ◽  
Prediction Method ◽  
Measured Data ◽  
Fuzzy Mathematics ◽  
Application Research ◽  
Function Model ◽  
Deformation Prediction ◽  
Surface Movement ◽  
Prediction Function

In this paper,based on the fuzzy mathematics theory, established prediction function model about the surface movement deformation caused by underground mining. On the basis of the measured data of a large number of engineering, determined the fuzzy measure expression. The function model is applied to a surface movement deformation prediction in the mines, combine with the Matlab, implement the surface movement deformation’s 3D visualization. The results of prediction was coincident with the test data, illustrated that the function model has certain validity and practicability. The method provided an exploration for the reserch of Surface Movement Deformation Prediction method.

Grey Forecasting Model Refining in Deformation Prediction Based on Semi-Parametric Regression

2012 ◽  
Vol 204-208 ◽  
pp. 2731-2735
Author(s):  
Ning Gao ◽  
Xi Min Cui
Keyword(s):  
Data Analysis ◽  
Error Term ◽  
Point Of View ◽  
Forecasting Model ◽  
Important Work ◽  
Initial Value ◽  
Deformation Prediction ◽  
Parametric Regression ◽  
Grey Forecasting ◽  
Proposed Model

Accurately estimating the deformation of dangerous rock is an important work for surveyors. Aiming at the limitation of the traditional GM (1,1) model, we propose that the error term in GM(1,1) model have an important influence on this model’s precision and adaptability. From this point of view, a novel new model termed SRGM (1, 1) is proposed. In this proposed model, the work modifies the algorithm of GM (1, 1) by integrate within semi-parametric regression model to eliminate the error term resulted from the traditional calculation of background value and initial value. According to the experimental results, our proposed SRGM (1, 1) model obviously can improve the precision of prediction and therefore can be adopted to deformation data analysis.

Bestimmung des zerebralen Blutflusses mittels des 81 Rb/81 mKr-Generatorsystems

1990 ◽  
Vol 29 (01) ◽  
pp. 7-12 ◽  
Author(s):  
J. Bialy ◽  
F.-J. Hans ◽  
E. Oberhausen ◽  
W.J. Peters ◽  
M. Schmitt ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Blood Circulation ◽  
Semiconductor Device ◽  
Animal Experiments ◽  
Initial Value ◽  
Brain Arteries ◽  
Sufficient Concentration ◽  
Static Quantity

A method is being developed which not only measures cerebral blood flow as a static quantity but also its changes with time. For that purpose a semiconductor device ascertains the proportion of intracerebral81 Rb and 81mKr activities. By opening the haemato-encephalic barrier in animal experiments a sufficient concentration of intracerebral81 Rb could be attained and the modified blood circulation after step-wise ligature of all brain arteries brought into relation to the corresponding Rb/Kr quotient. Over the range from undisturbed to completely interrupted cerebral blood flow this quotient varied up to 25% of its initial value.

In-vitro- und In-vivo-Wirkung von Schilddrüsenhormon auf das Wachstum von Neuroblastomzellen

1990 ◽  
Vol 29 (03) ◽  
pp. 120-124
Author(s):  
R. P. Baum ◽  
E. Rohrbach ◽  
G. Hör ◽  
B. Kornhuber ◽  
E. Busse
Keyword(s):  
Cell Differentiation ◽  
Neuroblastoma Cells ◽  
Control Group ◽  
Initial Value ◽  
Initial Rise ◽  
Biphasic Effect ◽  
Contrast Microscopy ◽  
Morphological Sign

The effect of triiodothyronine (T3) on the differentiation of cultured neuroblastoma (NB) cells was studied after 9 days of treatment with a dose of 10-4 M/106 cells per day. Using phase contrast microscopy, 30-50% of NB cells showed formation of neurites as a morphological sign of cellular differentiation. The initial rise of the mitosis rate was followed by a plateau. Changes in cyclic nucleotide content, in the triphosphates and in the activity of the enzyme ornithine decarboxylase (ODC) were assessed in 2 human and 2 murine cell lines to serve as biochemical parameters of the cell differentiation induced by T3. Whereas the cAMP level increased significantly (3 to 7 fold compared with its initial value), the cGMP value dropped to 30 to 50% of that of the control group. ATP and GTP increased about 200%, the ODC showed a decrease of about 50%. The present studies show a biphasic effect of T3 on neuroblastoma cells: the initial rise of mitotic activity is followed by increased cell differentiation starting from day 4 of the treatment.

Mathematical Models of Papermaking

2001 ◽  
Vol 6 (1) ◽  
pp. 9-19 ◽  
Author(s):  
A. Buikis ◽  
J. Cepitis ◽  
H. Kalis ◽  
A. Reinfelds ◽  
A. Ancitis ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Initial Value Problems ◽  
Moisture Transfer ◽  
Bound Water ◽  
Drying Process ◽  
Initial Value ◽  
First Order ◽  
Heat And Moisture ◽  
The Mathematical Model ◽  
The Web

The mathematical model of wood drying based on detailed transport phenomena considering both heat and moisture transfer have been offered in article. The adjustment of this model to the drying process of papermaking is carried out for the range of moisture content corresponding to the period of drying in which vapour movement and bound water diffusion in the web are possible. By averaging as the desired models are obtained sequence of the initial value problems for systems of two nonlinear first order ordinary differential equations. 

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