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Landslides are major hazards for human activities often causing great damage to human lives and infrastructure. Therefore, the main aim of the present study is to evaluate and compare three machine learning algorithms (MLAs) including Naïve Bayes (NB), radial basis function (RBF) Classifier, and RBF Network for landslide susceptibility mapping (LSM) at Longhai area in China. A total of 14 landslide conditioning factors were obtained from various data sources, then the frequency ratio (FR) and support vector machine (SVM) methods were used for the correlation and selection the most important factors for modelling process, respectively. Subsequently, the resulting three models were validated and compared using some statistical metrics including area under the receiver operating characteristics (AUROC) curve, and Friedman and Wilcoxon signed-rank tests The results indicated that the RBF Classifier model had the highest goodness-of-fit and performance based on the training and validation datasets. The results concluded that the RBF Classifier model outperformed and outclassed (AUROC = 0.881), the NB (AUROC = 0.872) and the RBF Network (AUROC = 0.854) models. The obtained results pointed out that the RBF Classifier model is a promising method for spatial prediction of landslide over the world., (Copyright © 2019. Published by Elsevier B.V.)

Objective: To evaluate the surgical techniques of open reduction and internal fixation performed for ankle fracture retrospectively and the corresponding clinical outcomes., Methods: From March 2001 to January 2006, 242 patients with ankle fracture were treated. A total of 85 patients with complete clinical data were analyzed. According to the Lauge-Hansen classification system, the fractures were classified into pronation-external rotation (grade II) in 12 cases and grade IV in 9 cases, supination-external rotation (grade II) in 34 cases and grade IV in 16 cases, supination-adduction (grade II) in 8 cases, and pronation-abduction in 6 cases. The reduction and internal fixation started with lateral malleolus, then medial malleolus and posterior malleolus, and distal tibiofibular syndesmosis in sequence. Among 10 cases, 5 of the distal tibiofibular syndesmosis were fixed with one screw through 3 layers of bone cortexes. All cases were auxiliarily fixed with plaster pad for 4 to 6 weeks after operation., Results: The follow-up period varied from 6 to 36 months, with an average of 10 months. There were no local complications such as malunion or nonunion of the fractures and deformity of the ankle. The inserted screw to distal tibiofibular syndesmosis was not broken. The patients were evaluated with Baird-Jackson scoring system. The numbers of the patients who had excellent, good, fair and poor results were 53, 23, 6, 3, respectively. The excellent and good rate was 89.4%., Conclusion: Operative treatment may provide satisfactory clinnical outcomes for ankle fracture. Proper internal fixation and correct fracture pattern estimation are of importance to achieve and gain better long-term results.