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The condition monitoring system of gearboxes usually employs accelerometers fixed on the gear housing to diagnose the gear damage. Such diagnostic system is essential in scheduling the maintenance of drive-trains. However, the successful application of vibration based diagnostic techniques for planetary gearboxes is still challenging because of the complexities of the sideband behaviors in the measured...
BBS is an important channel of public opinion spreading, so establishing model to analyze public opinion spreading characteristics will naturally become the primary goal of public opinion control. This paper analyzes the application of Social Network Analysis and sentiment classification in the research of BBS public opinion spreading, builds user reply relation network with real data base on the...
Aiming at the problem of energy efficiency of public institution to be promoted, this paper propose a method of analysis of public institution energy use basing the multi-level energy transfer model. Firstly, analyze the energy use characteristics of public institution, so as to preliminary ascertain the energy consumption systems of public institution. Then, construct public institution multi-level...
This essay analyzed the economic influence of to tourism destination applying to the Hotelling Space difference model. One of the studied results is that tourism destination could improve the price and profit level only when the information technology investment scale of single tourism firm overruns its competitor. When scale is constant, it could increase the total surplus of consumer and social...
Information technique has deeply impacted on development of tourism industry; information is the key factor to tourism industry development. This paper qualitative analyzes the application of IT and the influence in the tourism industry. Taking Chinese tourism economic date of 1999–2009 years as example, applying to the information Resources Abundance Coefficient Model, positive correlation is found...
Ship power system continuously expanding its scale makes simulation test to grow its importance for the safety evaluation. This platform integrates object-oriented technology, visualization technology and database technology to build ship power system graphical simulation platform. We establish the simulation model of ship power system component by using object-oriented technology. The user just needs...
In this paper, according to the time series theory and the term life insurance of fixed insurance amount, a mathematical model of single premium of term life insurance under stochastic interest is established, and the example analysis illustrates the significant rationality of this model under fixed interest.
The effect of different modeling design on temperature field of headlamp was studied. Numerical simulation of internal temperature field of headlamp was performed and temperature distributing rules were summarized. On those bases, a fast analytical model of temperature field of headlamp was presented considering flow field around the automobile. Taking one headlamp modeling design for example, numerical...
Based on the KRC model as transformation thermodynamics, a new model of the phase equilibrium temperature of X80 pipeline steel has been established by C++ under the hot deformation conditions, on which analyzing the influences of true strain, deformed temperature and strain rate. The results given by the model have good agreements with the measured value. It shows that the model can have a good accuracy...
In order to analyze the influence of saddle parameters on driving stability of tractor semi-trailer, the steering stability was investigated in the typical operating conditions under the time-domain simulation based on the dynamics model. Then, the paper analyzed the match and the estimation of the effects of parameter variations, these analyses got better values for the design reference. The results...
Deformation resistance of X80 pipeline steel was researched by experiment with the Gleeble-3500. Establishing the model of dislocation density of X80 pipeline steel through the corresponding relationship between dislocation density and deformation resistance, then combining with the thermodynamic model of X80 pipeline steel which is based on the KRC thermodynamics model in order to analysis the effect...
In multi-antenna wireless communications, spatial and temporal correlations always affect the performance of space-time codes (STC) designed for uncorrelated channels. In this paper, we use the Laplace transform and derive a closed-form expression for pairwise error probability (PEP) of STC over this double correlated fading channels. Numerical results show that the simple expression can achieve the...
Based on the analysis of the steering performance, the objective of this paper is to present evidence for the tractor adopted the four-wheel steering (4WS) which can improve the handling and stability of tractor semi-trailer. The simplified single track model with 3 DOF for 4WS tractor semi-trailer has been constructed for dynamic simulation through time-domain response on the two states of small...
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