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In recent years,the amount of the malwares has tended to rise explosively.New malicious samples emerge as variability and polymorphism.By means of polymorphism,shelling and confusion,traditional ways of detecting can be avoided.On the basis of massive malicious samples,a safe and efficient method was designed to classify the mal-wares.Extracting three static features including file byte features,assembly features and PE features,as well as im-proving generalization of the model through feature fusion and ensemble learning,which realized the complementarity between the features and the classifier.The experiments show that the sample achieve a stable F1-socre (93.56%).

Objective: To investigate the effects of laparoscopy in treating ectopic pregnancy complicated with intrauterine pregnancy., Method: Laparoscopy was performed in 5 patients with ectopic pregnancy complicated with intrauterine pregnancy., Results: The ectopic pregnancy tissue or the damaged fallopian tube was successfully excised laparoscopically., Conclusion: Laparoscopy is safe for treating ectopic pregnancy complicated with intrauterine pregnancy, causing minimal injuries and less disturbance to intrauterine pregnancy and ensuring rapid recovery.

Objective: To evaluate the impact of laparoscopic surgery on oxidative stress in patients with uterine myomas., Methods: Plasma malondialdehyde (MDA), antioxidant activity (AOA), and glutathione peroxidase (GPx) activity in 20 patients with uterine myomas were measured before, at the end of (5 min after deflation), and 24 h after laparoscopic surgery, for comparison with the measurements in 20 patients receiving laparotomic surgery at the same time points., Results: Immediately following laparoscopic surgery, plasma MDA level increased significantly as compared with the preoperative level (P<0.01) and recovered the normal level 24 h after the operation; but in laparotomic surgery, plasma MDA level underwent a slight increase in the immediately early postoperative stage and continued to increase 24 h after the operation. In laparoscopic surgery, GPx and AOA decreased significantly in the early postoperative stage (P<0.01) and recovered to some extent 24 h postoperatively, whereas in laparotomic surgery, GPx and AOA slightly decreased immediately following the operation and further decreased 24 h after the operation. Compared with patients receiving laparotomic surgery, laparoscopic patients had significantly lower plasma MDA level (P<0.01) and significantly higher GPx activity (P<0.01) with comparable AOA level (P=0.33) 24 h after the operation., Conclusion: Free radical produces at the end of a laparoscopic procedure, possibly as a result of ischemia-reperfusion induced by the inflation and deflation of the pneumoperitoneum.