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Recently, some statistically optimal steganalyzers are proposed based on hypothesis testing theory, in which the cover pixels are supposed to be independent. However, the independent assumption is of limited interest since redundancy exists in natural images. In this paper, using a more appropriate image model considering pixel correlation, a new steganaly-sis method for the least significant bit...
Welding cold crack is the most serious defects in welding structure, which has a direct impact on product quality and may even cause major accidents. In this paper, the inclined y-shaped groove butt welding experiments have been conducted. The present work explored the acoustic and magnetic properties by means of acoustic emission and MMM testing during the cooling process after welding. The change...
RWIS (Road Weather Information System) data is integral to assisting transportation agencies in making critical maintenance decisions. In China, road weather sensors are occupied by foreign products, especially pavement sensors. Standardized testing methodologies for pavement sensors are limited, because of the lack of a large number of meteorological data. By reviewing previous research regarding...
Software testing is a very important part in software projects. As a key issue in software testing, Optimal Testing Resource Allocation Problems (OTRAPs) have drawn more and more attention recently. Along with the rapid increasing of the scale and complexity of software systems, the problems become more and more difficult to solve. Although some single objective optimization approaches had been used...
This paper presents an approach to solve the data association problem for a hybrid metric map representation. The hybrid metric map representation uses Voronoi diagram to partition the global map space into a series of local subregions, and then a local dense map is built in each subregion. Finally the global feature map and the local maps make up of the hybrid metric map, which can represent all...
For the problem of little sample size and incomplete sample information which leads to the fact that fault diagnosis results are not ideal in the transformer fault diagnosis process, we combine the simplifying of rough sets with support vector machine classification .Then, we build the model of transformer fault diagnosis which is based on the rough sets and support vector machine .Proved by the simulation...
To solve the class imbalance problem in classification of pre-miRNAs with ab initio method, a novel sample selection method is proposed according to the characteristics of pre-miRNAs. Real/pseudo pre-miRNAs are clustered based on their stem similarity and their distribution in high dimensional sample space respectively. The training samples are selected according to the sample density of each cluster...
Considering that NC machine tools are difficult to be excited, a novel method of executing the self-exciting of structural vibration by applying a machine tool movement, which is proved to be effective by machine tool testing, is presented in the proposed study. The influence of movement parameters on the vibration response is studied by testing the designed movement under different parameters and...
The light-emitting diode (LED) is the world's most efficient light source being mass produced today. However, the packaging cost is relatively high, which has been the main factor restricting widespread application of LED lighting. As the LED industry becomes prosperous, short time consumption for single die measurement is particularly concerned by semiconductor manufacturers. Parallel scheduling...
Least squares support vector machines (LSSVM) has been carried out in order to obtain a statistically meaningful analysis of the extended set of molecules. The combined HF with LSSVM correction approach (LSSVM/HF) has been applied to evaluate the transition energies of organic molecules. After LSSVM correction, the RMS deviations of the calculated transition energies reduce from 0.91 to 0.26 eV for...
One design goal of future processors is to maximize the performance per watt. However, the performance of general purpose processors can be hardly improved by barely increasing clock frequency. This paper presents an application specific reconfigurable processor architecture which is fine tuned for high performance computing. It benefits from the application specific hardware customized to significantly...
More and more softwares based on web service technologies are developed. Before their releases on the Internet, it is necessary to evaluate these systems' performance, especially their response time under different workload pressures. However, existing performance testing benchmarks and tools for web service applications are difficult to adapt to various user-specific testing purposes. This paper...
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