The quantitative classification of granite and their metallogenetic relations have never been discussed.The Q-system clustering analysis and discriminant analysis methods were alternately used to quantitatively analyz...The quantitative classification of granite and their metallogenetic relations have never been discussed.The Q-system clustering analysis and discriminant analysis methods were alternately used to quantitatively analyze the 11 oxide data in granite samples from the West Qinling area of Gansu Province,and then to construct the quantitative classification series models of granite(oxide).The granites samples are divided into three categories and eight subcategories.The classification of granites is biased toward prospecting.According to the spatial correlation between eight types of granites and copper deposits,lead and zinc deposits,gold deposits,etc.(within 3 km of the intrusion)in the West Qinling area in Gansu Province,the“metallogenic related intrusions”are sought,and the prospecting target areas are defined.Furthermore,they provide reliable basis for regional geological prospecting.展开更多
Based on the desertification definition of United Nations Convention to Combat Desertification and features of desertification in China, three-level hierarchical classification system for desertification and quantitat...Based on the desertification definition of United Nations Convention to Combat Desertification and features of desertification in China, three-level hierarchical classification system for desertification and quantitative assessment methodology of desertification degree were developed and used to evaluate desertification danger degree across the country. The system is composed of three components: type of desertification, type of land utilization and degree of desertification. The type of desertification monitored in China was divided into 4 major categories, 15 sub-categories and 52 types. Vegetation coverage, soil characteristics, and topography are considered as three major indicators for quantitative assessment of desertified land. A simple, yet practically sound mathematical assessment model was built using these indicators. Furthurmore, a regional land desertification warning model was also constructed on the basis of the ratios of non-desertified land area to desertified land area in different degrees. The warning result of wind-erosion desertification at county scale for 12 provinces in northern China was also calculated by this model.展开更多
Objective Hemifacial microsomia(HFM),a congenital craniofacial malformation,is characterized by unilateral mandibular dysplasia.At present,the Pruzansky classification is the most common descriptive classification use...Objective Hemifacial microsomia(HFM),a congenital craniofacial malformation,is characterized by unilateral mandibular dysplasia.At present,the Pruzansky classification is the most common descriptive classification used clinically,which involves mandibular deformities.Although multiple classification systems have been proposed for HFM,a quantitative classification has not yet been proposed.This study intended to propose a quantitative classification for HFMaccording to the mandibular volume on the affected side.Methods Patients with HFM from January 2017 to January 2018 were included,and the A/U ratio(volume of the affected side/volume of the unaffected side)was measured.This study proposed a classification for HFM(mandibular-volume classification,MVC)according to the A/U ratio and compared the new classification system with the Pruzansky classification using consistency and correlation tests.Results A total of 48 patients were included.The results of MVC based on the A/U ratio were as follows:A/U>0.85,classified asmild;0.73-0.85,as moderate;and<0.73 assevere;the weighted kappa value of the Pruzansky and MVC classifications was 0.616(P<0.01).Conclusion The quantitative classification of HFMbased on the A/U ratio can serve asa viable evaluation index for patients withHFM and can provide a new reference index for determiningthe treatment plan.展开更多
基金This work was supported by Mineral Resources Compensation Project of Gansu Province(2017D18)Basic Geological Survey Project of Gansu Province(20151616).
文摘The quantitative classification of granite and their metallogenetic relations have never been discussed.The Q-system clustering analysis and discriminant analysis methods were alternately used to quantitatively analyze the 11 oxide data in granite samples from the West Qinling area of Gansu Province,and then to construct the quantitative classification series models of granite(oxide).The granites samples are divided into three categories and eight subcategories.The classification of granites is biased toward prospecting.According to the spatial correlation between eight types of granites and copper deposits,lead and zinc deposits,gold deposits,etc.(within 3 km of the intrusion)in the West Qinling area in Gansu Province,the“metallogenic related intrusions”are sought,and the prospecting target areas are defined.Furthermore,they provide reliable basis for regional geological prospecting.
基金the National Natural Science Foundation of China (Grant No.30070601 and 399904900)
文摘Based on the desertification definition of United Nations Convention to Combat Desertification and features of desertification in China, three-level hierarchical classification system for desertification and quantitative assessment methodology of desertification degree were developed and used to evaluate desertification danger degree across the country. The system is composed of three components: type of desertification, type of land utilization and degree of desertification. The type of desertification monitored in China was divided into 4 major categories, 15 sub-categories and 52 types. Vegetation coverage, soil characteristics, and topography are considered as three major indicators for quantitative assessment of desertified land. A simple, yet practically sound mathematical assessment model was built using these indicators. Furthurmore, a regional land desertification warning model was also constructed on the basis of the ratios of non-desertified land area to desertified land area in different degrees. The warning result of wind-erosion desertification at county scale for 12 provinces in northern China was also calculated by this model.
文摘Objective Hemifacial microsomia(HFM),a congenital craniofacial malformation,is characterized by unilateral mandibular dysplasia.At present,the Pruzansky classification is the most common descriptive classification used clinically,which involves mandibular deformities.Although multiple classification systems have been proposed for HFM,a quantitative classification has not yet been proposed.This study intended to propose a quantitative classification for HFMaccording to the mandibular volume on the affected side.Methods Patients with HFM from January 2017 to January 2018 were included,and the A/U ratio(volume of the affected side/volume of the unaffected side)was measured.This study proposed a classification for HFM(mandibular-volume classification,MVC)according to the A/U ratio and compared the new classification system with the Pruzansky classification using consistency and correlation tests.Results A total of 48 patients were included.The results of MVC based on the A/U ratio were as follows:A/U>0.85,classified asmild;0.73-0.85,as moderate;and<0.73 assevere;the weighted kappa value of the Pruzansky and MVC classifications was 0.616(P<0.01).Conclusion The quantitative classification of HFMbased on the A/U ratio can serve asa viable evaluation index for patients withHFM and can provide a new reference index for determiningthe treatment plan.
