a newly developed heavy duty diesel engine in dual fuel mode of operation has been studied in detail. the main fuel would be natural gas and diesel oil as pilot injection. the importance and effects of mixture preparation and formation through ports, valves and in cylinder flow field with different swirl ratio and tumble on diesel combustion phenomena is an accepted feature which has been studi...

In image based rendering (IBR), a 3D scene is recorded through a set of photos, and a novel view is rendered by assembling data from the photo set. Compression is essential to reduce the huge data amount of IBR. In this paper, we examine three categories of IBR compression algorithms: the block coder, the reference coder and the high dimensional transform (wavelet) coder. It is observed that th...

Compression Ratio (CR) and Logical Operation Time (LOT) are two major measures of the efficiency of bitmap indexing. Previous works by [5, 9, 10, 11] compare the performance of bitmap compression schemes conducted separately on logical operation time and compression ratio. This paper will describe these works and recommend for consideration a new matrix – overall efficiency indicator. The overa...

Our motive of this study is to develop an application of the wavelet packet to PIV image compression processing in order to improve the spatial resolution and reliability furthermore. It was found that the reconstructed PIV image with a lower compression ratio might emphasize particle edges at a relatively high spatial resolution. The reconstructed PIV image with a higher compression ratio may ...

In present Multimedia Computing era, compression of multimedia data has been highly significant. Digital Image, being a major part of multimedia data, requires effective compression mechanisms as well. During last few decades, there had been innovated numerous image compression techniquesmost of which achieve considerable compression ratio by taking the advantage of domain transformation. Very ...

This paper investigates a complementary compression concept to the JPEG 2000 standard for improving the compression efficiency of medical images, in terms of compression ratio and image quality, by introducing a denoising process before the application of the JPEG2000 compression. The case of dental radiography is assessed, where the JPEG 2000 compression standard is appropriately tuned to fit ...

In this earlier multimedia scenario, the various disputes are the optimized use of storage space and also bandwidth. In order to shrink the storage space of pictures and transmission of information with customize limited bandwidth availability, Image compression plays a crucial role by retreating the size of image and to exploit the bandwidth in economical and valuable manner without demeaning ...

This paper proposes a framework for the constitutive model based on the semi-micromechanical aspects of plasticity, including damage progress for simulating behavior of concrete under multiaxial loading. This model is aimed to be used in plastic and fracture analysis of both regular and reinforced concrete structures, for the framework of sample plane crack approach. This model uses multilamina...

Superstrings have many applications in data compression and genetics. However the decision version of the shortest superstring problem is NP-complete. In this paper we examine the complexity of approximating a shortest superstring. There are two basic measures of the approximations: the compression ratio and the approximation ratio. The well known and practical approximation algorithm is the se...

This paper proposes a method to improve the performance of Fractal lmage Compression (FIC) technique by combining FIC (lossy compression) and another lossless method (in this case Huffman coding is used). This proposed method takes advantage on each techniques, the high compression ratio that can be provided by FIC and the infinite peak-to-peak signal to-noise ratio (PSNR) that can be provided ...