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This paper describes the use of this 3D virtual reality engine of making natural landscape walkthrough. It explains the methods of making the sky, topography, trees and flowers, water of nature common things in Unity 3D, and expound Unity 3D software has quick and convenient advantage in making of virtual roaming, at last, it emphaise the pursuit for realistic scene is more important than the scene...
The composition of the landscape image can convey the emotion of cameramen. Proposed in this article is one novel technique for landscape image composition analysis, which could lay the foundation for the further analysis of image emotion. This method is mainly aimed at analyzing the composition of landscape image with no foregrounds compos. Firstly, the image segmentation method based on edge detection...
After analyzing the essence of service selection, an optimum service selection genetic algorithm with multi-objective constraints is proposed. The algorithm includes a matrix-coding scheme of chromosomes that expresses the relationship between service providers, services and end-users. Special crossover and mutation operations based on matrix-coding are constructed, and both operations can ensure...
This thesis puts forward a security framework for internet of things based on SM2 cipher algorithm agreement. In TLS1.1 handshake agreement, SM2 and IBC authentication modes, key exchange mode have been employed; DH key negotiation manner will be cancelled and the definition of cipher external member has been modified. Besides, the author advances a key management system of internet of things, As...
The codon usage bias of DPV UL19 gene and 25 reference herpesviruses have been analyzed in this study. This work was performed by program CodonW 1.4, and CUSP and CHIPS of EMBOSS. The results indicated that codons of DPV UL19 gene were strong bias towards the synonymous codons with A or T at the third codon position. The codon adaptation index (CAI), effective number of codons (ENC), and GC3s values...
Mobile learning is a new stage of distance education, and is the product of the stage in which wireless mobile communication device and wireless mobile communication network technology are developed to be mature. Its main characteristic is the 4A"Anyone Anytime Anywhere Anystyle" free learning style. This paper introduces the concept of Mobile Learning and 3G technology, also describes the...
In order to resolve the problem of loading mass terrain data in airborne radar real beam ground map (RBGM), multi-resolution terrain database and data loading tactic is designed, which meets the demand of terrain resolution in different range and reduces the system memory consumption. By using and optimizing Terrain defilade algorithm which is fit for far distance condition, whether a ground echo...
Based on two-way wave equation, prestack reverse time migration (RTM) overcomes dip limitation, and can image complicated geological body with high precision. However, since the massy storage, large amount of computation, low frequency noise, the industrialization process of this approach develops slowly. High order finite difference algorithm is used to calculate reverse time migration in the paper...
To explore the characteristics of morphological awareness in different subtypes of Chinese dyslexia children.[Methods] The one cognitive test was used to compare the characteristics of morphological awareness of different subtypes of Chinese dyslexia children (the poor decoding; the poor comprehension and the double-deficit group) and normal children. [Result] There were significant difference in...
Inter-atomic potential parameters of uranium dioxide, for a new partially ionic model (PIM), were found out by fitting method using experimental lattice parameter data in an improvised way. Thermodynamics properties of solid uranium dioxide that have been assessed in a wide temperature range from 300 K up to 3000 K include enthalpy, isobaric heat capacity, melt point, density variation with temperature,...
The effect is limited that in single-wavelet noise reduction. A new multiwavelet denoising method is available to inhibit the noise interference in the gyroscope output signals of an inertial navigation system. It will be an important Breakthrough that the vector of initial azimuth and attitude angle are determined quickly and correctly in the inertial navigation system. The sampling data reducing...
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