Aiming at insufficient robustness of depth map in multi-view 3D video with depth format, a 3D robust video watermarking algorithm based on depth map was proposed. Firstly, a depth map was divided into 4×4 nonoverlapped blocks, the mean square error of each block of pixels was calculated, and a threshold was set to distinguish the texture block and the flat block. Secondly, the block energy value of the texture block was calculated, and a threshold was set according to the calculated result to selectively embed the watermark bits. Finally, the transformed and quantized DC coefficients of each block were obtained and used to construct a 3×3 invertible matrix, then QR decomposition was performed on the invertible matrix and the watermark was embedded in the decomposed Q matrix. The proposed algorithm guarantees that the average Peak Signal to Noise Ratio (PSNR) is a constant, and the average Bit Error Rate (BER) under re-encoding attack with different Quantization Parameter (QP) values (25, 30, 35, 40) is 14.9%. Experimental results show that the algorithm has good robustness and embedding capacity, and has little impact on the quality of video.

With the improvement of standardization and intelligence level of secondary equipment, a kind of communication network more efficient and smarter is needed in smart substation to meet the substation operation and maintenance requirements, to achieve equipment plug and play, intelligent monitoring, subnet secure isolation and element interchange. For the application needs of substation network unified management, security isolation between subnets and equipment compatibility and interchangeability, a Software Defined Network (SDN)-based substation network architecture was proposed. IEC 61850 and OpenFlow protocols were used for network architecture design. OpenFlow controller was used to control and isolate the individual subnets to implement network device management and subnet secure isolation. The experimental results show that precise traffic control based on service types, and securely data isolation can be implemented with the proposed substation SDN-based network architecture. It has a very important application value for promoting the operation and maintenance level of smart substation.

Traditional security testing methods (such as symbolic execution, fuzz testing, and taint analysis) cannot obtain high coverage of Graph User Interface (GUI) for Android programs. To solve this problem, an Android program testing method combining both static and dynamic analysis was proposed. Based on the static analysis of data flow of Android applications, activity translation graph and function call graph were constructed, and the GUI elements of the program were parsed, then scripts were written to dynamically traverse GUI elements of applications. This method was applied to the testing of the applications including Booking Calendar, Wifi Master Key and 360 Weather, the result showed that the average coverage of activity reached 76%, which was significantly higher than that of manual testing (30.08%) as well as GUI tree traversal (42.05%-61.29%). Experimental result demonstrate that the method can effectively traverse GUI of Android applications.

With reference to the creation of the independent game StarMusiX, this paper provided a new method of designing game scenes in order to solve such problems as high cost and low efficiency in development and production of game scenes. The method is that external data was analyzed in real-time and the result was recognized as the driving factors of real-time game scenes building, meanwhile the details of game scenes were generated by program. In the experimental game, scenes can be generated by inputting and analyzing "music-data" and a full expression can be found in "music-visualization". This verifies the rationality and feasibility of the above methods. The experimental results indicate that the method effectively improves the efficiency of game scenes design.

Integrity is a critical parameter for Global Positioning System (GPS)/ Strapdown Inertial Navigation System (SINS) tight coupling system. In order to reduce satellites' failure detection time, an innovation extrapolation method based on the innovation test method was proposed. By disposing the innovation produced in the extrapolation process, the innovation extrapolation method's test statistics that has been used for failure detection was formed. Applying the proposed method in GPS/SINS tightly coupled system, the simulation results show that innovation extrapolation method can detect slowly growing failure faster than the innovation test method, and innovation extrapolation method can undermine the effect of outliers for failure detection.

Real-time moving vehicle modeling and dynamic behavior simulation is an important research in virtual reality game engine. In this paper, a real-time vehicle game engine was designed and presented. Auther provided a method of real-time vehicle rendering based-on multi-body dynamics in engine, and could simulate different of dynamic behaviors as real as in real world. The other techniques such as collision detection, 3D music rendering, real-time virtual environment rendering were also realized. Thus,it can enhance the immersion when user walk-through virtual environment.