82 results about "Relational equation" patented technology

A method of generating a check matrix for an LDPC code includes determining a coding rate, generating a basic matrix that satisfies predetermined conditions, determining a number of columns of a check matrix, substituting rows of the basic matrix based on a specific relational equation, provisionally searching an ensemble of weights by executing Gaussian approximation, deleting rows of the basic matrix after the permutation in order from the bottom by considering the number of rows after a division, searching an optimal ensemble of weights by executing Gaussian approximation based on a predetermined condition after row deletion, and dividing at random the weights of the basic matrix after the row deletion based on the optimal ensemble.

In a Fresnel lens which is made of a lens material whose refraction index is n, and focuses light beam from a light source at a specified radiation view angle phi, and has plural N pieces of circular lens surfaces arranged concentrically around a common optical axis, and plural circular rise surfaces arranged adjacent alternately between these lens surfaces, and two lens surfaces adjacent via at least one of the rise surfaces are concave surfaces, and tangent lines and at the intersecting point with the rise surfaces of the shape of a cross section passing through the optical axis of those lens surfaces intersect at the outside with respect to the optical axis, and when the angle formed between these tangent lines is defined as theta, a relational equation theta>=phi / (2 n N) stands.

An electronic apparatus includes: a temperature measurement section that measures a temperature of a heat generation source generating heat by consuming power or a temperature of an inner position of a casing of which the temperature changes due to the heat generation of the heat generation source; and an environmental temperature calculation section that calculates a temperature which is calculated using a predetermined relational equation that is different in accordance with a model from a difference between a first temperature measured by the temperature measurement section at a point in time when the heat generation source starts consuming a predetermined amount of power and a second temperature measured by the temperature measurement section at a point in time after the passage of a predetermined period from the start of consumption of a predetermined amount of power by the heat generation source as an environmental temperature in an environment where the casing is placed.

A two-dimensional lattice calibrating device includes: a measuring unit that measures respective positions of marks for each of a plurality of measurement dispositions; a simultaneous-equations generating unit that generates simultaneous equations for acquiring deviations of the plurality of marks using a coordinate relational equation and a least-squares conditional equation that sets least-squares lines that minimize the deviation of actual position of the marks based on measurement values as coordinate axes of artifact coordinates; and a simultaneous-equations calculating unit that solves the derived simultaneous equations.

An apparatus for detecting a longitudinal force of a tire is provided with at least one mark (3) provided in on one circumferential line (j) in a tire (2), a first sensor (5) disposed in a vehicle body side (4) and capable of detecting a passage of the mark (3), a second sensor (7) capable of detecting a rotation angle (θ) of an axle (6), and a computing device (8) for computing a longitudinal force (Fr) of the tire (2) on the basis of an information of the first and second sensors (5, 7). The computing device (8) sequentially stores a rotation angle (θr) of the axle (6) when the mark (3) passes through the first sensor (5). Further, the computing device (8) computes a tire warp angle (αr) corresponding to a difference (θo−θr) between a no-load rotation angle θo (a rotation angle of the axle (6) in a no-load state) stored in advance and the rotation angle θr, and sequentially computes a tire longitudinal force (Fr) of a tire applied during the running from the warp angle (αr), using a previously determined relational equation F=f(α) between the warp angle (α) and the tire longitudinal force (F).