Zhengyan Zhang

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Location-Based Services (LBSs) have been one of the most popular activities in our daily life. Users can send queries to the LBS server easily to learn their surroundings. However, these location-related queries may result in serious privacy concerns since the un-trusted LBS server has all the information about users and may track them in various ways. In(More)
Taking the Megawatt Wind Turbine Gear Increaser as research object, the dynamics model was constructed by the software of SOLIDWORKS and ADAMS. STEP function was applied to simulate the driving rotation and load. Carried out FFT transform to the key components, and obtain the curves in time domain and frequency domain about meshing force. Compared with the(More)
This paper introduces a kind of rescue vehicle with laminated multilayer platforms used in the case of fire on large area and many floors, as well as the virtual prototype of that vehicle established with Solidworks. The special effects of the flame, smoke and characters is handled with particle system in 3DS MAX to accomplish in the scene, in order to(More)
Conventional network representation learning (NRL) models learn low-dimensional vertex representations by simply regarding each edge as a binary or continuous value. However, there exists rich semantic information on edges and the interactions between vertices usually preserve distinct meanings, which are largely neglected by most existing NRL models. In(More)
This paper systematically study the calculative theory of of large-scale port crane's the temperature field and thermal stress, Use the finite element software ANSYS to mode and analyse the large-scale port crane under the temperature field and temperature stress. Carry out a detailed study to results of the analysis and determine the impact of temperature(More)
This paper introduces the way to optimize the rocker-slider mechanism for lifting platform based on genetic algorithm of excessive objects, aimed at the minimum compression height, the maximum lifting height and the largest cylinder's axial force. And combined with MATLAB's graph management and interface development function, we have produced a motion(More)
Application of empirical formulas and related documents,calculation of the wind farm installation vessel's environment loads. Establish the model of wind farm installation vessel by the usage of software ANSYS to the actual situation. We can applied the Calculated environmental loads and dynamic load which obtained in the most adverse conditions to the(More)