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In this paper, for statistical validation of rival (analytical or simulation) models collected for modeling observable process in stochastic system (say, transportation or service system), a uniformly most powerful invariant (UMPI) test is developed from the generalized maximum likelihood ratio (GMLR). This test can be considered as a result of a new approach to solving the Behrens-Fisher problem...
We show how statistical Model Checking can be used for verifying properties of analog circuits. As integrated circuit technologies scale down, manufacturing variations in devices make analog designs behave like stochastic systems. The problem of verifying stochastic systems is often difficult because of their large state space. Statistical Model Checking can be an efficient verification technique...
The price of crude oil is tied to major economic activities in all nations of the world, as a change in the price of crude oil invariably affects the cost of other goods and services. This has made the prediction of crude oil price a top priority for researchers and scientists alike. In this paper we present an intelligent system that predicts the price of crude oil. This system is based on Support...
The theme is try to introduce the calculation software of fuel consumption for heavy truck which is based on Microsoft Access 2003 database management system and object-oriented visual programming language Visual Basic (VB) 6.0. It developed through the analysis of the important factors influencing heavy truck fuel consumption, the database of the actual running vehicle information, the compilation...
This paper proposes a practical model to monitor the degradation of electronic equipment and further to predict the remaining useful life based on the self-diagnostic data. The de gradation precursor, characterized by voltage or current signals, is modeled as a Non-stationary Gaussian process with tim e-varying mean and variance. Statistical testing is then used to characterize the trend patterns...
Randomized algorithms have been used to successfully address many different types of software engineering problems. This type of algorithms employ a degree of randomness as part of their logic. Randomized algorithms are useful for difficult problems where a precise solution cannot be derived in a deterministic way within reasonable time. However, randomized algorithms produce different results on...
Defect of the rail in service of Shanghai metro is very fearful. So as to it is heavy for checking and maintenance for steel rail. In this paper, the method of metro rail defect detection is introduced, and the main categories of rail defect is analyzed. According to the statistical analysis of a large number of detection data of the metro and the studying of its regularity, these conclusions are...
Design for manufacturability (DFM) is inevitable because of the formidable challenges encountered in nano-scale integrated circuit (IC) manufacturing. Unfortunately, it is difficult for designers to understand the cost-benefit tradeoff when tuning their design through DFM to achieve better manufacturability. This work attempts to assist the designer in this aspect by providing a methodology (called...
It is necessary to assess the reliability of safety-critical software to a high degree of confidence before they are deployed in the field. However, safety-critical software often includes some rarely executed critical operations that are often inadequately tested in statistical testing based reliability estimation. This paper discusses software statistical testing acceleration based on importance...
For software developed under the principles of Cleanroom Software Engineering, the software statistical testing often reveals no failure. Applying Bayesian Inference and taking into account the software structure information, this paper discusses how to estimate the failure probability under this condition. The criterion to stop statistical testing is also discussed under different conditions.
The traditional approach in ranking and selection procedures is to compare simulated systems based on the mean performance of a metric of interest. The system with the largest (or smallest) mean performance is deemed as the best system. However, the system with the best mean performance may be an undesirable choice because of its large variance. Variance is a measure of risk. A highly variable system...
The article establish an computing mode according to the Q-NM(Q-Nonlinear Mapping)theory and design a responsible program software and application flat. The theory and mode has been successfully applied to the testing device of car high energy dry mode ignition coin.
The optimal illuminant of jadeite-jades' color green were confirmed by the 277 pieces jadeite-jades' analysis of L*, C* and □E* 2000 under 3 standard illuminants D65, CWF, and AError! Reference source not found. By the contrastive analysis of theoretical and tested spectral distribution between standard illuminant CWF and D65, A, it is revealed that D65 has continuous and smooth spectral distribution...
This paper presents the application of Life testing methods for Life and Reliability Prediction of new components. The procedure developed for this work can be adopted for testing of any components by incorporating component specific changes. There are two major feature of this work. First, the emphasis of this work was to take life testing methods to understand the physics-of-failure of the components...
The article does empirical research on the margin level setting of Shanghai and Shenzhen 300 index futures. First of all, through the trend comparison chart of index and simulation index futures in 100 trading days, we obtain the conclusion that index data can instead of index futures. Then, 482 full samples' daily returns is to descriptive statistical analysis and test of normality, we obtain that...
In the work, we address a relation between segments overlapping in Welch periodograms and F-ratio, which is used in the problem of statistical identification of signals. We show that the F-ratio increases with the overlapping that gives a better identification of signals. The obtained results are illustrated by the application of the method to speech signals identification.
This paper refers the first results of the pilot study. Students at two foreign universities (the Peoples' Friendship University of Russia, Moscow, and the Aristotle University of Thessaloniki, Greece) were asked to fill in our questionnaires. The main goal of this pilot search was to test the understandableness of the questionnaire and to perform some first simple statistical testing. The aim of...
In order to maximize the signal detection probability, while maintaining a pre-specified false alarm rate, it is well known that the Neyman-Pearson likelihood ratio test (LRT) is the optimal sufficient statistic. As the distributions involved might depend on some unknown parameters, commonly a generalized LRT (GLRT) is evaluated where an estimate replaces the true value of the unknown parameters....
This paper investigated the relationship between capital structure and corporate performance. Differing from former studies, the paper stood on a special position of small and medium-sized enterprises and evaluated corporate performance by factor analysis method. Based on 608 observations, conclusions show that capital structure can improve corporate performance for small and medium-sized enterprises...
This article analyzes FDI (Foreign direct investment)'s Overflow Effect on High-tech Enterprises of Shannxi Province typically in two aspects of qualitative analysis and quantitative analysis on the basis of the review and summary of the general situation of FDI in the Hign-tech Enterprises of Shannxi Province. On the aspect of qualitative analysis, researches have been carried on in angles of economic...
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