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In the paper, we present ViViSnoop, a novel video-assisted keystroke inference attack which snoops the victim user's typed input without visually seeing it. Instead, it infers the typed input from the vibration extracted from the video capturing the desk where the physical or virtual keyboard is placed. ViViSnoop is built on the fact that keystrokes on the desk incur mechanical vibrations which are...
Recently, the use of unmanned aerial vehicle (UAV) is going to receive great interest in various areas. As a newly emerging area, UAV-aided communications encounter unique communication scenarios and thus need corresponding UAV channel models for better design of such UAV communication systems. In this paper, we propose a three-dimensional (3D) sphere UAV air-to-ground (A2G) multiple-input-multiple-output...
With the constant increase of multimedia internet penetration as well as rapid spread and sharing of various information, people pay more and more attention to the information related to daily power utilization. In order to realize the interaction between power companies and power utilization information of users, the power companies apply and register their public accounts to establish their own...
The objective of this research was to develop a meso-scale 3-axis milling machine with a nanometer resolution. The main elements of the Z-axis design of the meso-scale 3-axis milling machine are a pagoda structure, a high speed air bearing spindle, two HR8 ultrasonic motors, a laser diffraction grating interferometer system (LDGI) and a coaxial counter-balance system for the spindle. The optimal geometrical...
Due to the differences between traditional production mode and modular production mode, the modular enterprises' innovation behavior has been the focus of scholars under the field. This paper discusses and empirical analysis the suppliers' willingness to innovate in the modular production networks. The study found that the maturity of product modularization and the competition between module suppliers...
In order to expand the development of health edible functions of Acanthopanax leaves, to meet people's demand for low care wine, Acanthopanax low alcohol wine was studied. Corn without Germ and Acanthopanax leaves are main materials, using double enzyme saccharification, low-temperature fermentation technology to produce low-alcohol wine. Saccharification process conditions was optimized by orthogonal...
Between the year 2005 and 2007, the authors monitored the habitat of golden monkey (Rhinopithecus roxellana) with the geography information system, remote sensing and global position system. We record the transect, altitude, forest canopy cover, the height of the tree, slope. Vanderloeg and Scavia selective index was used to evaluate the golden monkey's selection for varied habitat parameter. Through...
Dredging simulation is of great significance to the development of dredging engineering technology of harbor, waterway, rivers, lakes, etc. The design and implement of the dredging simulation system are introduced. The modeling and key techniques for the virtual reality of construction site, the movement of dredge vessel, the soil cutting of cutter, and the hydraulic transport of sand in a pipeline,...
The paper introduces the system for dynamic generation of terrain and dredging cutter in work. The model of dredging cutter and the method of calculating the soil quantity are emphasized. 3D terrain is rendered by point pattern and grid model, represented by LOD(Level of Detail). Besides, the cutter model and its implicit equation are built. The collision between terrain grid and the dredging cutter...
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