Abstract: A computer-implemented method, a computer program product, and a computer system for ranking explanatory variables in multivariate analysis. A computer system extracts words from documents related to categories, creates a histogram of the words in each category, and selects top words in each histogram, where the top words are used as representing words in each category. A computer system generates respective feature vectors of explanatory variable candidates and a feature vector of an objective variable, where a feature vector of a corresponding variable includes elements corresponding to respective ones of the categories and a value of element indicates whether a name of the corresponding variable is included in the top words. A computer system calculates cosine similarity between each of the respective feature vectors of the explanatory variable candidates and the feature vector of the objective variable. A computer system ranks the explanatory variable candidates, based on the cosine similarity.

Abstract: Herein provided are methods for determining deposition of contaminants significantly influencing machine runnability or product quality in manufacturing processes of pulp and paper, especially determining the degree of deposition and the morphology of deposits of sticky contaminants or pitch and for evaluating the effect of chemicals for reducing deposition. In a manufacturing process of pulp and paper is used a method comprising: determining the degree of deposition of a contaminant from a liquid or slurry on a quartz crystal oscillator; and quantifying the morphology of deposits on the surface of the quartz crystal oscillator by image analysis. Further, a method comprising adding a chemical for reducing deposition to the liquid or slurry and then quantifying the degree of deposition and the morphology of deposits is used to evaluate the effect of the chemical.

Abstract: Herein provided are methods for determining deposition of contaminants significantly influencing machine runnability or product quality in manufacturing processes of pulp and paper, especially determining the degree of deposition and the morphology of deposits of sticky contaminants or pitch and for evaluating the effect of chemicals for reducing deposition. In a manufacturing process of pulp and paper is used a method comprising: determining the degree of deposition of a contaminant from a liquid or slurry on a quartz crystal oscillator; and quantifying the morphology of deposits on the surface of the quartz crystal oscillator by image analysis. Further, a method comprising adding a chemical for reducing deposition to the liquid or slurry and then quantifying the degree of deposition and the morphology of deposits is used to evaluate the effect of the chemical.

Abstract: A radiator core support structure comprises a radiator core support and a heat exchanger. The former has a through-hole, and a fixing hole on its the lower portion. The latter has a pipe projecting rearward and introduceable in the through-hole and a lower mounting pin projecting downward from its bottom portion. The fixing hole is formed as an elongate hole extending toward the front side so that the pipe can be kept free from an interference between the pipe and the radiator core support when the lower mounting pin is inserted in a front side of the fixing hole and the heat exchanger is turned rearward around the front side of the fixing hole to stand erect. Then, the fixing hole allows the mounting pin to be slid rearward for introducing the pipe through the through-hole.