Nonlinear diffusion and wavelet shrinkage are two successfully applied methods for discontinuity preserving denoising of signals and images. Recently, relations between both methods have been established taking into account wavelet shrinkage at one or multiscale. In this paper we show that one step of (stabilized) explicit discretization of nonlinear diffusion can be expressed in terms of tight frame shrinkage on a single spatial level or multiscale. We prove that our scheme permits larger steps while having more choices of shrinkage functions. Numerical examples demonstrate the behavior of our scheme for one or two scales.
Based on WSN,GPRS,embedded system,database and Web server technology,a system of collection,storage and release for field information was designed.The WSN network is responsible to collect field information,such as air temperature,humidity, illumination,image and so on. The information collected can be not only save in gateway's embedded database,but also transferred to the long-distance Web server.Which solve the farmland monitoring information storage, distribution and mobile measurement of inconvenience issues. Solar power supply module has the role of long-term supply power.Experimental result shows the system can accurately and timely collect information agriculture farmland.
Though VR (Virtual Reality) technique is now applied in petroleum exploration & development, the state-owned petroleum companies have no IP (intellectual property) for such a VR system in China. Thus, it is necessary to study and develop a VR system for our petroleum companies. Based on our previous achievements in study of software and hardware technique, the concept of developing a multi-subject cooperating exploration center based on VR system is proposed in this paper. The design of interpretation software is mainly done and the further study for it is put forward.
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