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In response to mobile terminal threats, this work is innovative, and gives practical solutions and prototype systems. The work first analyzes in detail the entire process of the generation, transmission and use of user-sensitive data within the Android system. In order to achieve resource sharing and data transmission between different applications and processes, the Android system provides a mechanism for inter-process communication based on Binder. Sensitive data is transmitted through Binder as a channel in the system. But sensitive data is carried out in the form of clear text during Binder transmission, which allows malware to easily intercept and tamper with sensitive data based on Binder communication, such as SMS content and GPS location information. In response to this problem, based on the above research, this work innovatively proposes and implements an adaptive transparent encryption protection scheme for sensitive data in the Android system from generation to use throughout the life cycle, effectively preventing sensitive data from being. The threat of theft and tampering by malicious third parties guarantees the privacy and integrity of user sensitive data during the internal transmission of the system. In addition, the system provides users with a simple and flexible operating experience, allowing users to independently protect specific types of sensitive data in specified applications, enhancing the ease of use and practicality of the system.

Aluminum industry is one of the most important industries in China’s nonferrous metal metallurgy industry. With the development of output in alumina and the improvement of its production technology, China’s high quality bauxite resources are difficult to meet. Under this condition, “Calcification-Carbonation Method” was put forward to deal with middle-low grade bauxite and red mud by Northeastern University, the main purpose of this method is to change the balance phase of red mud into 2CaO•SiO2 and CaCO3 with hydrometallurgical process. Through treatment by “Calcification-Carbonation Method”, A/S of the new structure red mud lowed below to 0.5 and the Na content lowed below to 0.3%, the red mud could be used in cement industry directly. This paper mainly introduced the technological idea and principle of new method, process comparison and typical experiment results is given as well.

Compared with the traditional cathode structure cell, the new cathode structure cell can restrain the level fluctuations of aluminum liquid, effectively reduce polar distance and decrease cell voltage, it makes greatly electricity saving into reality. In this paper, using cold water model experiment based on principle of similitude to study the level fluctuations by anode gas disturbance, and investigate the rules of level fluctuations in new cathode structure electrolytic cell. Numerical simulation of the anode structure with Fluent was also carried out. Simulation results are basically consistent with experimental results, which can verify possibilities of using Fluent to investigate fluctuations in the interface of cell. According to the analysis of experimental data, the empirical formula of amplitude are obtained by using dimensional analysis, which are associated to a variety of material factors, operating factors, equipment factors. After the theoretical analysis, Dimensionless equation is in good agreement with experimental results.