4 results about "Common logarithm" patented technology

The method, apparatus, device, and medium for converting linear values ​​of audio to decibel values ​​provided in this disclosure include: determining a target conversion relationship between a natural logarithmic linear value and a decibel value based on an initial conversion relationship between linear values ​​and decibel values ​​and a conversion relationship between the natural logarithm and a common logarithm; determining the natural logarithmic linear value and a linear value in the target conversion relationship based on a coordinate rotation digital calculation algorithm; and determining the decibel value based on the correspondence between the linear value in the target conversion relationship and a preset linear value. In the process of calculating the decibel value of audio based on the linear values ​​of audio, the calculation of the natural logarithmic linear value does not require the use of a multiplier; it can be achieved through a coordinate rotation digital calculation algorithm, which offers high accuracy in calculating the natural logarithmic linear value. Furthermore, the data processing method based on the coordinate rotation digital calculation algorithm can be directly implemented through hardware (digital circuits), resulting in lower resource consumption.

To provide a holding member with excellent durability that enables long-term use.SOLUTION: A holding member comprises a first member, a second member, and an adhesive member that bonds the first member and the second member, wherein when a stress generated in the adhesive member while the first member and the second member are being pulled with a constant tensile load along a connection direction in which the first member and the second member are connected via the adhesive member under a temperature condition of 120°C is defined as holding stress (MPa), and a time from when the holding stress (MPa) starts to be applied to the adhesive member until the adhesive member ruptures is defined as rupture time (h), an amount of change in the value of the holding stress (MPa) that increases the common logarithm of the rupture time (h) by 1 is a value within a range of -0.09 MPa or more and less than 0 MPa.SELECTED DRAWING: Figure 1

The invention discloses a fabric defect classification method and system based on deep integrated ELM, and belongs to the technical field of intelligent detection of textile quality. A fabric defect image data set is prepared and preprocessed; the method comprises the following steps: constructing a double-branch deep feature extraction network, wherein a first branch extracts three-level features based on the OfficientNet-B0 and embeds a channel-space attention mechanism to perform feature enhancement; the second branch is used for extracting three levels of features based on Swin Transform; after the features are subjected to multi-scale fusion, an integrated extreme learning machine is adopted for fabric defect classification, the integrated extreme learning machine comprises a plurality of differential base learners, the number of hidden layer nodes of each base learner obeys uniform distribution from 300 to 700, and common logarithms of regularization coefficients obeys uniform distribution from-6 to-2. The method is suitable for efficient and automatic quality detection and grading of fabric surface defects in an industrial production line.

The present application relates to the technical field of automobile rubber seal sealing capacity test, and discloses a kind of evaluation method of rubber material stress relaxation, the compression of the compression deformation sample of rubber material is carried out in compression deformation device, is placed in aging oven under specified temperature condition and is aged, reaches specified time, takes out sample, tests compression stress under quasi-static condition, compares compression stress value with initial force test value, records the compression stress retention rate under each time point, makes graph to the common logarithm of compression stress retention rate to time, obtains a straight line with slope, which is a simple measure of the stress relaxation of the sample, a measure of testing the sealing capacity of rubber, and can effectively reflect the change of the sealing force of the sealant.