D GIS spatial overlay analysis is being broadly concerned about in international academe and is a research focus. It is one of the important functions of spatial analysis using GIS technology. An algorithm of multi mo...D GIS spatial overlay analysis is being broadly concerned about in international academe and is a research focus. It is one of the important functions of spatial analysis using GIS technology. An algorithm of multi model spatial overlay based on three dimensional terrain model TIN is introduced in this paper which can be used to solve the TIN based three dimensional overlay operation in spatial analysis. The feasibility and validity of this algorithm is identified. This algorithm is used successfully in three dimensional overlay and region variation overlay analysis.展开更多
Model for prediction of the concentration of tin extracted during potassium hydroxide leaching of cassiterite has been derived. The model: A = Nt1.53, indicates that the concentration tin extracted is dependent on the...Model for prediction of the concentration of tin extracted during potassium hydroxide leaching of cassiterite has been derived. The model: A = Nt1.53, indicates that the concentration tin extracted is dependent on the residence time. It was found that the validity of the model is rooted in the expression Log A = Log (Nt1.53). Tin extraction per unit time as obtained from experiment and derived model are 2.6666 and 2.6268 mg/min respectively. The maximum deviation of the model-predicted concentration of dissolved tin from the corresponding concentration obtained from the experiment was found to be less than 8%, which is quite within the acceptable deviation limit of experimental results and hence, impacting about 92% confidence coefficient on the model.展开更多
By means of multivariance analysis and finite element on the basis of the analysis of generation andevolution of structural systems and structural system of syn-metallogenesis in the orefield,the authorsmade a researc...By means of multivariance analysis and finite element on the basis of the analysis of generation andevolution of structural systems and structural system of syn-metallogenesis in the orefield,the authorsmade a research into the interrelation between tecto-geochemistry and structural stress field,revealedthe mechanism of metallogenesis by magma and ore-forming fluids driven under dynamic forces,andproposed a tecto-geochemistry model for the formation of the ore deposits,so as to suggest a basis oftheory for the prognoses of location and magnitude of hidden deposits.展开更多
A new model for predicting ternary thermodynamic properties from its three binary systems has been presented,that is<sup>E</sup>G<sub>m</sub>=(（X<sub>1</sub>X<sub>2</sub&...A new model for predicting ternary thermodynamic properties from its three binary systems has been presented,that is<sup>E</sup>G<sub>m</sub>=(（X<sub>1</sub>X<sub>2</sub>）/(V<sub>12</sub>V<sub>21</sub>)<sup>E</sup>G<sub>12</sub>(V<sub>12</sub>V<sub>21</sub>)+(（X<sub>1</sub>X<sub>3</sub>）/(V<sub>13</sub>V<sub>31</sub>))<sup>E</sup>G<sub>13</sub>(V<sub>13</sub>,V<sub>31</sub>))+（1-X<sub>1</sub>）<sup>2</sup> <sup>E</sup>G<sub>23</sub>（（X<sub>2</sub>/（1-X<sub>1</sub>））,（X<sub>3</sub>/1-X<sub>1</sub>））where <sup>E</sup>G<sub>m</sub> represents the ternary excess molar thermodynamic property; <sup>E</sup>G<sub>ij</sub>indicates the thermodynamic properties of i-jbinary systems; X<sub>i</sub> represents the mole fraction of component i of ternary solution,while V<sub>ii</sub>=（1+X<sub>i</sub>-X<sub>j</sub>）/2.The model is con-sidered to be rigorous in the case where the pseudobinary systems of fixed X<sub>2</sub>/X<sub>3</sub> are regular solution.The application of newmodel to the prediction of ternary enthalpies of mixing for Bi-Ga-Sn,Au-Ag-Sn and NaCI-KCI-CaCl<sub>2</sub> systems shows thatthe calculated results by new model are closer to experimental data than those by Toop’s model.展开更多
文摘D GIS spatial overlay analysis is being broadly concerned about in international academe and is a research focus. It is one of the important functions of spatial analysis using GIS technology. An algorithm of multi model spatial overlay based on three dimensional terrain model TIN is introduced in this paper which can be used to solve the TIN based three dimensional overlay operation in spatial analysis. The feasibility and validity of this algorithm is identified. This algorithm is used successfully in three dimensional overlay and region variation overlay analysis.
文摘Model for prediction of the concentration of tin extracted during potassium hydroxide leaching of cassiterite has been derived. The model: A = Nt1.53, indicates that the concentration tin extracted is dependent on the residence time. It was found that the validity of the model is rooted in the expression Log A = Log (Nt1.53). Tin extraction per unit time as obtained from experiment and derived model are 2.6666 and 2.6268 mg/min respectively. The maximum deviation of the model-predicted concentration of dissolved tin from the corresponding concentration obtained from the experiment was found to be less than 8%, which is quite within the acceptable deviation limit of experimental results and hence, impacting about 92% confidence coefficient on the model.
文摘By means of multivariance analysis and finite element on the basis of the analysis of generation andevolution of structural systems and structural system of syn-metallogenesis in the orefield,the authorsmade a research into the interrelation between tecto-geochemistry and structural stress field,revealedthe mechanism of metallogenesis by magma and ore-forming fluids driven under dynamic forces,andproposed a tecto-geochemistry model for the formation of the ore deposits,so as to suggest a basis oftheory for the prognoses of location and magnitude of hidden deposits.
文摘A new model for predicting ternary thermodynamic properties from its three binary systems has been presented,that is<sup>E</sup>G<sub>m</sub>=(（X<sub>1</sub>X<sub>2</sub>）/(V<sub>12</sub>V<sub>21</sub>)<sup>E</sup>G<sub>12</sub>(V<sub>12</sub>V<sub>21</sub>)+(（X<sub>1</sub>X<sub>3</sub>）/(V<sub>13</sub>V<sub>31</sub>))<sup>E</sup>G<sub>13</sub>(V<sub>13</sub>,V<sub>31</sub>))+（1-X<sub>1</sub>）<sup>2</sup> <sup>E</sup>G<sub>23</sub>（（X<sub>2</sub>/（1-X<sub>1</sub>））,（X<sub>3</sub>/1-X<sub>1</sub>））where <sup>E</sup>G<sub>m</sub> represents the ternary excess molar thermodynamic property; <sup>E</sup>G<sub>ij</sub>indicates the thermodynamic properties of i-jbinary systems; X<sub>i</sub> represents the mole fraction of component i of ternary solution,while V<sub>ii</sub>=（1+X<sub>i</sub>-X<sub>j</sub>）/2.The model is con-sidered to be rigorous in the case where the pseudobinary systems of fixed X<sub>2</sub>/X<sub>3</sub> are regular solution.The application of newmodel to the prediction of ternary enthalpies of mixing for Bi-Ga-Sn,Au-Ag-Sn and NaCI-KCI-CaCl<sub>2</sub> systems shows thatthe calculated results by new model are closer to experimental data than those by Toop’s model.
基金Project (50925417) supported by the National Funds for Distinguished Young Scientists, ChinaProject (50830301) supported by the Key Project of National Natural Science Foundation of China
