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This article concerned modelling the dynamics of a novel type of autonomous underwater vehicle, which looked like a plane and worked in the condition of negative buoyancy. Linear system theory was applied to study the hydrodynamics of the negative buoyancy vehicle (NBV). The motions in the lognitudinal plane and the lateral plane were divided into a few modes, and the influence of buoyancy and metacentric...
The inventory model for deteriorating items with general trapezoidal type demand rate and partial backlogging rate is investigated in this paper. The deteriorating rate is a generous positive time-varying Weibull function, and the demand rate is a general trapezoidal type function. In this model, we allow the product out of stock. Assume that production function is a linear function of inventory level...
With the rapid development of multimedia technology and computer network technology, and the popularization of the Internet, digital media has gradually become the primary means of information exchange, such as images, audio, video. People can easily get a variety of digital information from the Internet. Because digital information can easily be illegally copied and manipulated, the current infringement...
The scientific scheduling of maintenance support resources in the war is very important to accomplishing the task of maintenance support, but the finity of maintenance support resources has a demand that the commander of maintenance support must schedule maintenance support resources dynamically. The paper consideres total effect of maintenance support, and takes the current and latent need into account...
The technique is established for performance-analysis and inner failure location of three-dimensional braided composites, which is based on the wave transmission of the acoustic emission and the equation of time location method. We have a few of failure three-dimensional braided composites which is seemed a crack on the material obviously. The crack is formed by the break yarn when the material are...
Modern equipment is large structure and complex function with redundant components within the system. As a result, the complexity is increased when fault diagnosis and analysis model is set up. In order to reduce diagnosis model complexity, a method of directed fault propagation model and optimization is proposed. Fault relationship among the components is analyzed based on the probability and influence...
Successful diffusion of information technology is the key point for IT firms to gain competitive advantages. Compared with other types of technology, most of information technology is characterized by significant network externalities, coherent cross-product interaction and high knowledge barriers. As the main impetus underlying diffusion modeling methods, the Bass model provides a general framework...
Aimed at the movement model of Three Beidou Geostationary Satellites passive dynamic positioning receiver and the noise characteristics of the receiving signal, the turn model is applied to represent exactly the movement pattern of the receiver, and a Kalman filter algorithm based on turn model is presented in this paper. By filtering the Three Beidou Geostationary Satellites passive dynamic positioning...
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