Numerical solutions of the wave equation have greatly aided geophysicists in both forward modeling and migration of seismic wave fields in complicated geologic media, and they promise to be invaluable in solving the full inverse problem. This paper compares time-stepping methods based on the solution...

This paper studies the modified hybrid projective synchronization of fractional order chaotic systems, which generalizes many various synchronization forms. We firstly present this kind synchronization that the response and drive systems have scaling factors at the same time. In addition, based on the...

The evaluation model of university laboratory safety based on BP neural network is presented. By reference of the domestic research for laboratory safety evaluation and combining with of laboratory characteristics of Jinlin University, the safety evaluation index system of university laboratory is selected....

GPS has been more and more important in people's life, which can provide accurate positioning for us. However, under realistic conditions GPS signal is very weak, it is easy to be outside intentional and unintentional interference, and thus can't achieve good positioning. This article describes the basic...

This paper presents an image compression algorithm based on neural network with almost real-time response, to address the difficulty of real-time video transmission and compression. After giving the structure of the neural network based video compression system, the self-learning algorithm of neural...

This paper investigates the complex dynamics of fractional-order hyper-chaotic complex system via numerical simulations. It is found that the variation of both the system parameters and the fractional order can induce bifurcations, and the parameter ranges of chaos are different. Also, a controller of...

Reverse time migration allows steep dip imaging, any lateral velocity variation and correct amplitude and phase information at the same time. However, it is time consuming and requires large hard disk memories. To shorten the running time of prestack reverse time migration, we use synthesized areal shot...

In this paper, bifurcation of a fractional-order complex system is studied. As system parameter is varied, bifurcation of the system is showed by the numerical simulation. The routes leading to chaos including the period-doubling and tangent bifurcations are obtained. The phase portraits for different...

According to compactly supported characteristics of bearing local damage diagnosis based on wavelet analysis, the construction of compactly supported orthogonal function method are studied. With the wavelet multi-resolution analysis and multivariate time series analysis as the foundation, the parameters...

In this paper, synchronization of a fractional-order complex system is studied. Based on the stability theory of fractional-order systems, the scheme of synchronization for the fractional-order complex system is proposed. the synchronization for the system is realized by designing appropriate controllers....

The coal seam gas content is the base of coal mine gas reserves calculation, but also is the important index to forecast the gas emission and evaluate the coal and gas outburst danger. The paper summarizes the current widely used mathematical models to predict the coal seam gas content, and focuses on...

Some oil refineries arrange low fusion point crude oil storage tanks and high fusion point ones at two different locations. Different fusion point crude oil needs different pipeline to transfer. So, to transport diverse fusion point oil needs two pipelines. Because of the constraints resulted from transferring...

The nutritious value of corn oil is gradually recognized by the public, while with the expansion of its production, how to detect its quality has become a tough problem. The research performs data analysis on the infrared spectrum of corn oil to inspect the quality of corn oil by adopting neural network...

Network media has become the main means of communication in modern life, this paper discusses how to do evaluation of the effect about network media dissemination, whether the media files reach the audience and the extent of the impact on the audience. To calculate the performance effect of network media,...