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In the distillation process, many important process variables are often difficult to be measured online. For example, the aviation kerosene is an important index of operation quality, but current methods cannot obtain the real-time value of the aviation kerosene efficiently. To solve this problem, a method of selecting the input variable based on partial least squares regression (PLS) is proposed...
To remove redundant variables and resolve the high correlation problem of soft sensor modelling, this paper proposed an efficient mutual information(MI) based partial least squares(PLS) method. First, we use MI criterion to sort the variables in a descending order according to their importance. Then the linearity between process variables and quality variables is tested through F test. If there is...
Canonical correlation analysis(CCA) is a popular technique that works for finding the correlation between two sets of variables. However, CCA faces the problem of small sample size in dealing with high dimensional data. Several approaches have been proposed to overcome this issue, but the resulting transformation matrix fails to extract shared structures among data samples. In this paper, we propose...
The multi-layer urban logistics facilities location is not only influenced by service radius, but also be readily influenced by the capacity of the facilities and the relationship of different demand points. Therefore, considering the constraints of capacity and correlation, the multi-level urban logistics infrastructures location model with constraints of capacity and correlation is developed based...
A new type of address code-Optical Orthogonal Code Pairs (OOCP) for Optical Code Division Multiple Access (OCDMA) system is presented in this paper according to the theory of sequence pair. Simultaneously, the concept of OOCP and correlation are defined, and OOCPs of capacity 1 are obtained by using exhaustive algorithm. Finally, OOCPs of larger capacity can be obtained by the recursive construction...
Optical orthogonal codes (OOCs) have been applied in OCDMA system because of their good correlation properties, especially the (n,w,1) optimal optical orthogonal codes. In this paper, based on block design and O-plus theory, the relationship between optimal optical orthogonal codes and O-plus Matrix is presented. One method, which could construct strict-optimal optical orthogonal codes, is proposed...
A new perfect discrete signal-mutual orthogonal binary complementary array pair set is presented under aperiodic correlation condition. Several construction methods of mutual orthogonal binary complementary array pair set are proposed. Based on these methods, a great many new mutual orthogonal binary complementary array pair sets can be generated. This kind of array signals extend the existence scope...
This paper considers the problem of correlation analysis using correlation coefficient and Random Forest. Although Random Forest is a function estimation algorithm, it provides two extra information about independent variables importance according to dependent one and partial dependence. Thus influencing order of correlative factors comes out. The limitation of correlation coefficient of only two...
Different classes of information system stakeholders depend on different values to be successful. Understanding stakeholders' value dependencies is critical for developing software intensive systems. However, there is no universal one-size-fits-all stakeholder/ value metric that can be applied for a given system. This paper presents an analysis of major classes of stakeholders' value priorities using...
Optical orthogonal codes (OOCs) have application in OCDMA system because of their good correlation properties. In this paper, two correlation-detection methods, difference method and distance method, were studied. Calculate amount of these correlation-detection methods was analyzed. Constraint condition of optimal optical orthogonal codes was discussed. Besides, a construction method of optimal (n,w,1)...
A discrete signal with good periodic correlation property is discussed, which is pseudorandom punctured binary sequence pairs. The invariant transformation properties and combinatorial admissibility conditions of it were presented. Based on these properties some pseudorandom punctured binary sequence pairs with certain length were searched out. The research results show that it has high energy efficiency...
A new discrete array signal with good periodic correlation property is discussed, which is ZCZ array pairs. The invariant transformation properties of it were presented. Based on perfect array pair and orthogonal matrix, ZCZ array pairs set with certain volume, family size and zero correlation zone can be synthesized through row or column interleaved technique. Except the binary case, this technique...
Distribution of effort in software engineering process has been the basis for facilitating more reasonable software project planning. This paper reports empirical results on activity effort distribution patterns of a series of industrial software maintenance projects. The results show that with respect to different influencing factors, the projects demonstrate large variations in their activity effort...
Airborne and space-borne imaging systems are often limited in resolution by image degradation resulting from mechanical vibrations during image exposures. A new image stabilization method using digital motion estimation and micro-mechanical compensation is presented. Motion estimation is accomplished by an auxiliary high-speed camera using modified real-time digital image stabilization (DIS) algorithm...
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