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36 results about "Common denominator" patented technology

Information Encoding Method, Decoding Method, Common Multiplier Estimating Method, and Apparatus, Program, and Recording Medium Using These Methods

An object of the present invention is to provide a method for encoding signals by separating a signal by using a common multiplier so as to improve the efficiency of compression of audio signals and a method for calculating a common multiplier of a set of numeric values including errors. A common multiplier A, of the input signal samples x(i) in each frame is estimated. Each sample x(i) is divided by A, the quotient is rounded to the number of significant digits, and the rounded quotient y(i) is encoded. The quotient y(i) is multiplied by A and the product is subtracted from x(i) to obtain an error signal z(i), which is then encoded. The multiplier A is encoded and the code of y(i), the code of z(i), and the code of A are combined together and outputted. To estimate the common multiplier, each numeric value is divided by a determined representative value. Irreducible fractions between the maximum positive error and the maximum negative error are obtained by dividing each numeric value by a correct representative value using rational approximation. Among the obtained irreducible fractions, the one having the smallest common denominator of the numeric values is obtained and the common denominator is corrected using the representative value to obtain a common multiplier.
Owner:NIPPON TELEGRAPH & TELEPHONE CORP

Access management technique with operation translation capability

Access management techniques have been developed to specify and facilitate mappings between I/O and host domains in ways that provide flexibility in the form, granularity and/or extent of mappings, attributes and access controls coded relative to a particular I/O domain. In some embodiments of the present invention, operation translations coded relative to a particular logical I/O device, domain or sub-window seek to optimize functionality, isolation or some other figure of merit without regard to needs or limitations of another. In this way, operation translations need not be uniform and need not reduce supported operation semantics to correspond to that of a lowest common denominator I/O device. In some embodiments, the form of mappings (e.g., of operation translations) may be specialized on a per-logical-device basis (or even a per-sub-window basis), thereby offering individual logical I/O devices (or sub-windows thereof) immediate, indexed, and/or untranslated operation mapping frameworks appropriate to their individual requirements or needs. In general, flexibilities and efficiencies afforded in some embodiments of the present invention can be desirable, particularly as the diversity of I/O device types and richness of transaction semantics supported in interconnect fabrics increase. Some embodiments may be leveraged in support of sophisticated system partitions or I/O virtualizations.
Owner:NXP USA INC

Gas steam combined cycle unit multivariable constrained prediction function load control method

ActiveCN104090491ASmall pressure fluctuationsSolve the disadvantages of large amount of calculationAdaptive controlSteam pressureLoad instruction
The invention discloses a gas steam combined cycle unit multivariable constrained prediction function load control method. The method is characterized by comprising the steps that (1) an original load instruction counter circuit is adjusted, and a primary frequency modulation instruction is superposed onto a load instruction of a gas turbine; (2) a 2*2 controlled object model with gas turbine fuel valve opening and steam turbine inlet adjusting valve opening as input and combined cycle unit actual power and steam turbine main steam pressure as output is built, wherein the controlled object model is expressed by an equation shown in the specification, PW is the combined cycle unit actual power (MW), TP is the steam turbine main steam pressure (MPa), U1 is the gas turbine fuel valve opening (%), U2 is the steam turbine inlet adjusting valve opening (%), G11 is a transfer function with the U1 as input and the TP as output, G12 is a transfer function with the U2 as input and the PW as output, G21 is a transfer function with the U1 as input and the TP as output, and G22 is a transfer function with the U2 as input and the TP as output; in addition, it is ensured that denominators of the G11 and the G12 are the same, and the denominators of the G21 and the G22 are the same after reduction of fractions to a common denominator is carried out on the transfer functions.
Owner:SOUTHEAST UNIV
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