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For aero-engine main shaft bearings, fatigue damage is one of the main failure models in the contact interface of rolling elements and raceways. In this paper, the fatigue damage of the bearing is analyzed based on the stress. The feature changing rules of the quasi-static alternating stress and the dynamics contact stress are obtained respectively in the quasi-static and the dynamic method. Based...
The precision of wind power forecast system (abbr. WPFS) depends on many field situations, such as geographical conditions, the quality of numerical weather prediction (abbr. NWP), and historical data acquisition. The forecast models and their specifications differ case by case. It is necessary to provide any efficient methodology to design an adaptive WPFS. This paper analyzes, evaluates and then...
Applied in power system integrated with large scale wind farms, an equivalence method based on parameter aggregation is presented in this paper. The method is used to get parameter aggregation of equivalent model of coherent wind farms, considering the reserve of dynamic electric load at the boundary nodes. Transient stability simulation of the original system and equivalent network is conducted and...
Missile-engine is an important part of missile system and a crucial factor to form military battle effectiveness. Considering of the long-term stored and one-time expended characteristics of missile-engine, it is significant to study storage reliability assessment of missile-engine and determine the weak moment. For digging the potential storage life of missile-engine, a missile-engine storage reliability...
In coded cooperation, diversity is enhanced since cooperating nodes transmit different parts of a coded packet on different channels. In this paper, we investigate the outage probability behavior of coded cooperation relaying strategies over Nakagami-m fading channels. An exact expression for the outage probability is derived using the statistical characteristic of the signal-to-noise ratio. We also...
Vertically oriented Si nanorods (SiNRs) grown on different substrates were successfully obtained by hot wire chemical vapor deposition (HWCVD) with the glancing angle incident silane flux. The organic-inorganic hybrid solar cells were fabricated by spin coating 3-hexylthiophene (P3HT) into the SiNRs array with the average length of ~200 nm and average separation of ~10 nm. The P3HT shows well penetration...
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