基于层次分析法的智能手机恶意软件静态检测及评价模型

Mobile malware is rapidly increasing and its detection has become a critical issue. In this study, we summarize the common characteristics of this mali-cious software on Android platform. We design a de-tection engine consisting of six parts: decompile, grammar parsing, control flow and data flow analysis, safety analysis, and comprehensive evaluation. In the comprehensive evaluation, we obtain a weight vector of 29 evaluation indexes using the analytic hierarchy process. During this process, the detection engine ex-ports a list of suspicious API. On the basis of this list, the evaluation part of the engine performs a compre-hensive evaluation of the hazard assessment of soft-ware sample. Finally, hazard classification is given for the software. The false positive rate of our approach for detecting malware samples is 4. 7% and normal samples is 7.6% . The experimental results show that the accuracy rate of our approach is almost similar to the method based on virus signatures. Compared with the method based on virus signatures, our approach performs well in detecting unknown malware. This approach is promising for the application of malware detection.     

粉煤灰综合利用的新途径

随着青海省电力资源的不断开发,火力发电厂粉煤灰的综合利用问题已十分突出。近年来粉煤灰在建材行业、公路建设、水电大坝工程建设中都得到了广泛应用,但由于利用量很小,远远解决不了日益增长的粉煤灰带来的环境污染问题。因此积极探索和开发粉煤灰综合利用的新路子、新方法,对改善环境质量,提高社会效益和经济效益等方面,都有十分重要的意义。为此青海大通水泥厂在不断的生产探索和粉煤灰开发研究中,利用粉煤灰部分代替粘土配料生产普通硅酸盐     

粉煤灰综合利用的新途径

随着青海省电力资源的不断开发,火力发电厂粉煤灰的综合利用问题已十分突出。近年来粉煤灰在建材行业、公路建设、水电大坝工程建设中都得到了广泛应用,但由于利用量很小,远远解决不了日益增长的粉煤灰带来的环境污染问题。因此积极探索和开发粉煤灰综合利用的新路子、新方法,对改善环境质量,提高社会效益和经济效益等方面,都有十分重要的意义。     

粉煤灰综合利用

NewApproachofFlyAshUtilization青海省桥头发电厂是燃煤火力发电厂,年耗煤量近70万吨,年排放灰渣30多万吨。目前电厂五、六期扩建工程正在建设之中,加上扩建工程耗煤量,每年排放灰渣近90万吨。桥头发电厂一至五期工程灰渣由灰渣泵水力输送到灰场贮存,迄今该灰场已堆存灰渣约300万吨,堆存高度约5m,由推土机堆坝圈定。扩建工程灰场设在正西方向1．5km处,按五、六期工程4台125MW机组运行20年的灰渣量（约1100万m3）规划设计。大通水泥厂是70年代的老厂,有一台Φ2．2m×8．5m盘塔式机立窑,设计规模为年产425号普通硅酸盐水泥4．4…