The probabilistic models and methods for risk prediction and processes optimization, considering characteristics of threats, the measures of control, monitoring and recovery for complex system are proposed. The way of generating new models to increase an accuracy of probabilistic modeling is described....

Compressed air is considered to be the second electric power energy in the industrial applications, the energy consumption accounted for about 9% of the national industrial power consumption, study the compressed air system is of great significance. This paper studies the frequency conversion constant...

A kind of UAV with coaxial propellers and multi-rotor is presented and the dynamics model of this UAV is established in this paper, then the control system of the UAV is designed on the basis of PID control algorithm, which includes altitude and atti-tude control module. Simulation results show that...

It is of great necessity to explore a method to seek for a wrecked plane in the sea. In this paper we think of a static situation and establish a model that can be applied to quickly search the plane fallen into different oceans. Firstly, we develop a parabola model to simulate the process of plane falling....

To study epicenter intensity model of aftershock, regression analysis on 68 sets data of main shocks and their aftershocks have done, epicenter intensity linear model has researched. According to analysis of earthquake parameters such as peak ground acceleration (PGA), ground motion duration, spectrum...

The complex adaptive multi-agent system evolution requires the system is capable of evolving dynamically according to the application requirements and run-time environment changes. The scenario concept in the requirements phase of software engineering domain is introduced to the dynamic evolution. Different...

Industrial added value (IAV) is an important indicator to measure a country's industrial development level, at the same time, is also a core indicator of national economy accounting system. The paper respectively using ARIMA and Holt - Winters, the two time series forecasting model, to fit the monthly...

In order to provide scientific and effective analysis tools and decision support platform for the irrigation district management, this paper provides a way using GIS spatial database, visualization simulation(VS) to research on a new way for irrigation management system. During the system, interface...

Performance of Automatic Identification System (AIS) transmitter is very important for AIS network reliability and marine safety. In order to ensure the performance, a high precision AIS transmitter automatic test system based on Virtual Instrument Software Architecture (VISA) and the Standard Commands...

The flight dynamic equations in mathematics for aircraft response to the crosswind effects during the landing are highly non-linear partial differential equations. The main objective of this paper is to present fuzzy-logic modeling (FLM) technique to establish flight control models with the function...

The performance of gas-drilling (drilling oil and gas wells with air, nitrogen, or natural gas) is very unpredictable in many areas due to lacking of proper design of drilling parameters because of limited understanding of gas-rock interaction which requires knowledge of heat transfer in the well system....

The alumina-based eutectic ceramic is considered as a most promising candidate materials of aviation engines due to its excellent mechanical property and high temperature oxidation resistance. Effect of the crucible rotation on the zone melting process of the eutectic ceramic is analyzed by finite element...

For unstability and backward control method of ceramic shuttle kiln control system, a kind of hybrid intelligent control method of ceramic shuttle kiln is proposed in the paper. According to firing process of ceramic shuttle kiln, intelligent hybrid model of firing process for ceramic shuttle kiln was...

Face as the most direct and important carrier of human's daily emotional expression and information exchange, with its peculiar to different from other organs and parts of the universality and ease of use as mathematical modeling of the object of study, and many research algorithm has been applied to...

This research is to solve the stability analysis issue of nonlinear pressurized water reactor cores. On the basis of modeling a nonlinear pressurized water reactor core using the lumped parameter method, its linearized model is achieved via the small perturbation linearization way. Linearized models...

A two-dimensional tidal model with the adjoint method is used to investigate the optimum strategy for siting of new tidal stations in the Bohai Sea. Open boundary conditions of the model are estimated and the M2 constituent in the Bohai Sea is simulated by assimilating observations from tidal stations...

An adaptive unscented Kalman filtering(UKF) method for geomagnetic/celestial autonomous navigation is presented to solve the problem that the conventional UKF is sensitive to the initial value and declines in accuracy and further diverges due to the system model inaccuracy. Firstly, the residual sum...

This paper studied how to use the variation of the dispersion curves of Rayleigh wave group velocity to detect interfacial debonding damage between FRP plate and steel beam. Since FRP strengthened steel beam is two layers medium, Rayleigh wave velocity dispersion phenomenon will happen. The interface...

Despite the possibility of finding exact solutions to the Einstein field equations, there is another way to obtain new exact solutions without having to directly solve the Einstein field equations. This method is the so called "solution generating theorems". In the descriptive approximation of stars,...

In this paper, a model of active control system with delays is studied. Some sufficient conditions to guarantee the stability and oscillations for the system are established. Computer simulation is given to support our result.