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with the popularity of the Internet and increasingly diversiform commodity, the recommendation system as a common approach came into our daily life, which supports an assistant decision-making when we purchase something on the internet. The traditional recommendation system is based on the user's collaborative filtering algorithm, and Amazon proposed a collaborative filtering algorithm to achieve...
With space debris increasing, the flight environment of ballistic missile is serious. In order to insure the safety flight of missile, the avoidance strategies are studied when it's possible to collide between missile and space debris. Multiple-pulse strategy is studied to avoid the collision, while the whole process is converted to compute min-fuel problem with complicated restraints. Genetic algorithm...
Recently, the general Volterra filter (VF) has been adopted for the modeling of parametric loudspeakers. However, the computation complexity of the VF is too high for real-time implementation. In this paper, a one-dimension Volterra filter (ODVF) with much lower complexity is introduced to model and compensate for the nonlinearity of parametric loudspeakers. A theoretical framework for ODVF model...
On the basis of retaining the merits of the traditional artificial potential field method which has simple structure and is easy to implement, and combining with the characteristics of obstacles in the apple growing environment, an improved artificial potential field method is present for the obstacle avoidance of apple picking robot. The virtual target point is introduced to help the searching progress...
Vegetation fractional cover which defines the amount of vegetation on the surface of the land, is a key parameter in land surface models. Based on a geometric-optical model in combination with linear spectral mixture analysis, this paper discusses the estimation of shrub fractional cover in Wushen Banner of Inner Mongolia in the Mu Us Sandland using HJ-1B image. Firstly, we acquire the surface reflectance...
Aiming at the wide application of SPWM sinusoidal modulation wave in the inverter circuit, the paper presents a method of generating SPWM wave according to an improved equal area algorithm based on digital signal processor (DSP) TMS320F2812, and adopts a particle swarm optimization (PSO) algorithm to estimate the amplitude and phase of harmonics, hence, it can help to choose duty cycle to make the...
The Elaeagnus mollis Diels fruits is a specific plant product of south Shanxi province and HuXian of Shaanxi province. Regression equation between the diameter and length of nut, as well as relationship between the weight of kernel and nut was got by analyzing its shape and physical characteristics. Respectively by analyzing load direction and water content of effecting Elaeagnus mollis Diels fruits...
The numerical simulation was carried out by building methane-diesel fuel model at the base of physical model and basic control equation of hydrodynamics, by adopting non-premix combustion method, by simplifying combustion as blends, and by calculating blend fraction. Furthermore, its combustion press field, temperature field and velocity field were analysed. Finally, the experimental results indicated...
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