Abstract: Measured values are obtained from multiple points of a target by thinning out and measuring or measuring and then thinning out. A calculator 102 of a reconstructing device 101 calculates a variance/covariance matrix of the multiple points from calibration values measured at different points at the same time among the measured values. A corrector 103 obtains corrected values by interpolating unmeasured values for times when the measured values are absent at each of the multiple points. Here, the corrector 103 obtains the corrected values so that a variance/covariance matrix of the multiple points that should be calculated from the corrected values matches or approximates to the variance/covariance matrix calculated from the calibration values.

Abstract: Measured values are obtained from multiple points of a target by thinning out and measuring or measuring and then thinning out. A calculator 102 of a reconstructing device 101 calculates a variance/covariance matrix of the multiple points from calibration values measured at different points at the same time among the measured values. A corrector 103 obtains corrected values by interpolating unmeasured values for times when the measured values are absent at each of the multiple points. Here, the corrector 103 obtains the corrected values so that a variance/covariance matrix of the multiple points that should be calculated from the corrected values matches or approximates to the variance/covariance matrix calculated from the calibration values.

Abstract: A signal separating device includes an iterative estimator, a repeating calculator, a result output unit, and a repetition controller. The repeating calculator repeatedly causes the iterative estimator to iteratively perform independent component analysis on an observed signal matrix, and to further perform independent component analysis on the source signal matrix obtained as a result. The result output unit outputs the product of the respective mixing matrices obtained during each repetition as a mixing matrix with respect to the observed signal matrix, while also outputting the source signal matrix obtained during the final repetition as a source signal matrix with respect to the observed signal matrix. The repetition controller causes the repeating calculator to repeat the calculation control until all mixing matrices and all source signal matrices satisfy a convergence condition. The iterative estimator may perform a fixed number of iterations, or perform iterations until convergence is obtained.

Abstract: A signal separating device includes an iterative estimator, a repeating calculator, a result output unit, and a repetition controller. The repeating calculator repeatedly causes the iterative estimator to iteratively perform independent component analysis on an observed signal matrix, and to further perform independent component analysis on the source signal matrix obtained as a result. The result output unit outputs the product of the respective mixing matrices obtained during each repetition as a mixing matrix with respect to the observed signal matrix, while also outputting the source signal matrix obtained during the final repetition as a source signal matrix with respect to the observed signal matrix. The repetition controller causes the repeating calculator to repeat the calculation control until all mixing matrices and all source signal matrices satisfy a convergence condition. The iterative estimator may perform a fixed number of iterations, or perform iterations until convergence is obtained.

Abstract: In a multimedia information providing system, responding to a preview request from a terminal equipment, a server device generates a chaotic random number sequence from an initial value allocated to the terminal equipment, mixes this sequence into a set of multimedia information as a noise signal at a first mixing ratio, and then transmits the result as a first set of multimedia information for distribution. Responding to a quality improvement request, the server device generates a chaotic number sequence from the initial value allocated to the terminal equipment, mixes this sequence into a set of multimedia information as a noise signal at a second mixing ratio, and then transmits the result as a second set of multimedia information for distribution. The terminal equipment performs component analysis on the first and second sets of multimedia information, removing the noise and restoring a high-quality version.

Abstract: Provided are a receiving device which improves communication performances by separating signals in CDMA communications using a chaos code, etc. In the receiving device, a receiving unit receives a signal directly spread by a chaos code and transmitted from a transmitting device, a component analyzing unit applies component analysis to the received signal to separate it into a plurality of components, a despreading unit obtains a plurality of signals by despreading the plurality of separated components by the chaos code respectively, and a selective output unit selects a signal having a large intensity from the plurality of despread signals, and outputs it.

Abstract: An information reception unit of a chemical substance classification apparatus receives plural kinds of target change information on changes in a quantity of a plurality of chemical substances, applies a predetermined conversion to the target change information, and supplies them to a component analysis unit as a target signal group. The component analysis unit analyzes independent components of the target signal group by independent component analysis, and outputs a component signal group as the analysis result. An analogousness degree calculation unit applies a predetermined inversion to the component signal group, regards the inversion result as a plural kinds of component change information, and calculates analogousness degrees of each component change information with respect to each of the plural kinds of target change information.