Search

Existing methods for detecting Android malware only consider a single kind of features, which do not fully describe the features of Android software. In order to solve the above problems, this study presents a multimodal Android malware detection method based on the permissions, byte code probability matrix and function call graph. At the same time, in order to solve the problem of feature representation of function nodes, a new node feature generation method is presented in this study in the generation of function call graph. In order to enrich the semantic information of opcode, a byte probability matrix generation method based on 2-gram is presented. The experiment proves that the method described the characteristics of Android software more comprehensively than other methods, and the detection accuracy rate reached 95.2%. Compared with the existing methods, the accuracy of this method has been improved by 22% on average, effectively improving the detection ability of Android malware. [ABSTRACT FROM AUTHOR]

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bulletin of Botanical Research is the property of Bulletin of Botanical Research Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Taiwan Agricultural Research is the property of Taiwan Agricultural Research Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Taiwan Agricultural Research is the property of Taiwan Agricultural Research Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Technology Economics is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Clinical Neurosurgery / Linchuang Shenjingwaike Zazhi is the property of Editorial Board of Journal of Clinical Neurosurgery and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Medical Equipment Journal is the property of Chinese Medical Equipment Journal Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Liquid Crystal & Displays is the property of Chinese Journal of Liquid Crystal & Displays and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper proposed a method of video character relationship mining based on association rules under MapReduce frame aiming at the problem of single relationship in current video character relationship mining. Firstly, this method applied face clustering in the preprocessed video images. Secondly, it introduced three concepts of relational refinement, namely relational direction, relational weight and relational impact, and mined positive and negative association rules in the resulting face transaction database. Finally, this paper compared the mining result graph with the objective character relationship graph in the degree of difference among the corresponding graph nodes. Experiments show that the proposed method can extract the main structure of objective relation graph, at the same time complete the refinement of the relationship between characters compared with other video character relationship mining method. It has a strong reference value for the research of video content analysis. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Computational Mechanics / Jisuan Lixue Xuebao is the property of Chinese Journal of Computational Mechanics Editorial Office, Dalian University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Liquid Crystal & Displays is the property of Chinese Journal of Liquid Crystal & Displays and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Oxidative dehydrogenation of propane (ODHP),with highly promising energy efficiency,is a newfangled technology for producing propene. First of all, the effects of flow rates of H2O and O2 with different temperature on the yield of propene were analyzed thermodynamically by Aspen Plus software. Then, based on the kinetic reaction model provided by the literature experiment, the model of the plug flow reactors was established. The steady-state simulation was carried out, which was in accordance with actual situation of the industrial units. The influencing factors of propylene yield were analyzed. It was concluded that the optimization of steam, catalyst and oxygen led to the increase of propylene yield by 25%, 19% and 7% respectively. Finally, the Comsol software was used to make the coupled calculation of R1 reactor. The structure of oxygen distributor of R2 oxidation reactor was studied preliminarily. [ABSTRACT FROM AUTHOR]

Copyright of West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Rizosphere nutrient regulation for vegetable seedling is the basis to cultivate high quality seedlings. Among them, nitrogen regulation in the rhizosphere is of great importance for the growth and development of tomato seedling. Previous studies on the nitrogen regulation in the rhizosphere were mostly focused on the physiological development of tomato seedlings. The absorption and utilization of nitrogen are closely related to the root system architecture at the seedling stage. Researches have shown that root length density, root depth, root radius related to root architecture parameters can limit uptake, transport and utilization of nitrogen and phosphorus in the root. Furthermore, the interactions of root three-dimensional (3D) architecture with different nitrogen concentrations will affect root nitrogen uptake, transfer and use efficiency. However, these interactions and the responses of the 3D architecture of root system for tomato seedling to different nitrogen levels are not well reported yet. Therefore, the aim of current study was using 15N tracer method and 3D digitizing technology to investigate the efficiency of nitrogen absorption and transfer, and root 3D architecture at seeding stage. A greenhouse experiment of tomato seedling under different nitrogen concentration treatments was conducted by sand cultivation in the Chinese Academy of Agricultural Sciences. Greenhouse temperature was controlled at 25-28℃ for the day and at 15-20℃ for the night. Tomato seeding of ‘Zhong Za 109’ was used as the study material. After cultured under 3 nitrogen levels, the seedlings were transplanted in the plastic pots (diameter 35 cm, height 10 cm, volume 35 dm3) with quartz sand matrix. The 3 nitrogen levels were 4, 12 and 20 mmol/L (N4, N12 and N20). Hoagland complete nutrient solution was used to water the tomato seedlings with 700 mL per day, according to the requirements of normal growth of tomato seedling. Moisture content within quartz sand remained at about 60%. Nine days after transplanting, isotope test was carried out, in which 15N labeled nutrient solution was used to water the plant and this lasted till 18 days after transplanting. Then, nitrogen nutrient solution without the labeled 15N was continuously used to water the plant till the end of experiment, 30 days after transplanting. Experiments were designed by using randomized block design with totally 120 plants for each treatment and 3 repetitions per treatment. Four plants were sampled for each treatment at each time. Measurements of plant biomass, leaf area and nitrogen content for each organ, and root architecture information were done every 9 days after transplanting. Isotope 15N for each type of organ was measured 18 and 27 days after transplanting respectively. ScanMaker i800 Plus (Microtek) was used to scan the root system with the precision of 400 dpi. The spatial coordinates of the root system were measured with Fastrak (Polhemus, 3Space, USA). The results showed that tomato seedling dry weight, leaf area, root-shoot ratio were significantly affected under different nitrogen treatments. The root total length, root surface area and root branching density under N4 treatment were 16.5%, 17.5% and 15.5% higher than those under N20 treatment. Root architecture under N4 treatment was with narrow radius and deep depth, compared with those under N20 treatment. High nitrogen concentration would promote root 15N uptake and distribution rate. 15N allocation rate sequence was leaf > stem > root, which showed the largest contribution of root nitrogen transfer for leaf. The transfer of 15N and utilization rate of nitrogen fertilizer were the highest for 12 mmol/L treatment, with 508.3 mg transfer per plant and 8.9% nitrogen use efficiency. The transfer of 15N for 20 mmol/L treatment was 128 mg per plant higher than that for 4 mmol/L treatment; however, the utilization rate of nitrogen fertilizer was reduced by 2%. The results indicate that the nitrogen concentrations can be decreased in tomato production, and the tomato seedlings will take the initiative to change the root 3D configurations to improve nitrogen use efficiency. [ABSTRACT FROM AUTHOR]

Based on the semi-parametric models with panel data, we research what's the six indicators' (researchers' ratio, enterprise scale, the imported technology costs, export ratio, R&D funding ratio and new fixed assets ratio) impacts to the five high technology industries respectively. Then we compare and analyze the results. It shows: The researchers' ratio, imported technology costs and export ratio stimulates innovation performance. Specifically, the imported technology costs has a good impact on aerospace industry and computer industry; the researchers, ratio stimulates computer industry mostly; and export ratio has little impact on all the high technology industries. The results can improve the innovation performance of high technology industry. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)