35 results about "Stretch factor" patented technology

The invention provides a method and apparatus for identifying gestures performed by a user to control an interactive display. The gestures are identified based on a bounding box enclosing the points at which a user contacts a touch sensor corresponding with the display surface. The invention thus permits the use of inexpensive and highly reliable grid-based touch sensors that provide a bounding box to describe contact information. In identifying the gestures, the position, motion, shape, and deformation of the bounding box may all be considered. In particular, the center, width, height, aspect ratio, length of the diagonal, and orientation of the diagonal of the bounding box may be determined. A stretch factor, defined as the maximum of the ratio of the height of the bounding box to the width of the bounding box and the ratio of the width of the bounding box to the height of the bounding box, may also be computed. Finally, gestures may be identified based on the changes in time of these characteristics and quantities.

The present invention provides a method and apparatus for arriving at true relative amplitude destretched seismic traces from stretched seismic traces. The method compensates for offset varying reflection interference effects due to normal moveout. Stretch factors β and also input spectra are determined for NMOR stretched seismic traces. Estimates are then made of stretched wavelet spectra from the input spectra. A destretched wavelet spectra is then obtained. Shaping correction factors are determined by taking the ratio of the destretched wavelet spectra to the stretched wavelet spectra and are applied to the input spectra of the stretched traces to arrive at a destretched trace spectra. True relative amplitude scaling factors are computed by taking the ratio of a true relative amplitude property of the destretched wavelet spectra to a corresponding true relative amplitude property of the stretched wavelet spectra. Finally, the true relative amplitude scaling factors are applied to the destretched trace spectra to arrive at true relative amplitude destretched seismic traces.

A computer-implemented method of accounting for angle-dependent wavelet stretch in seismic data based on a novel relationship between wavelet stretch and the cosine of a reflection angle of an acoustic ray. Conventional seismic data having at least one wavelet, such as data generated from a reflection seismic survey, is accessed. The data is processed such that at least one wavelet is subject to angle-dependent wavelet stretch. A reflection angle for at least one wavelet is also determined. An operator is utilized to calculate a wavelet stretch factor for at least one wavelet based on the cosine of the corresponding reflection angle of the wavelet. The wavelet stretch factor is applied to the seismic data to account for angle-dependent wavelet stretch.

Aspects of a system and method for processing an image are presented. The method may comprise stretching contrast of an input image based on a distribution of luma values for the input image and a distribution of luma values for a desired output image. The pixels below a specified level of contrast defined by the distribution of luma values for the input image and the distribution of luma values for the desired output image are substantially stretched. The method may also comprise constructing a lookup table of the desired output luma values and stretching a contrast of the input image using the constructed lookup table. The method may also comprise applying linear function and a non-linear function to the distribution of luma values, and applying a stretch factor above a specified level of the distribution and a stretch factor below a specified level of the distribution.

The present invention provides a method and apparatus for arriving at true relative amplitude destretched seismic traces from stretched seismic traces. The method compensates for offset varying reflection interference effects due to normal moveout. Stretch factors β and also input spectra are determined for NMOR stretched seismic traces. Estimates are then made of stretched wavelet spectra from the input spectra. A destretched wavelet spectra is then obtained. Shaping correction factors are determined by taking the ratio of the destretched wavelet spectra to the stretched wavelet spectra and are applied to the input spectra of the stretched traces to arrive at a destretched trace spectra. True relative amplitude scaling factors are computed by taking the ratio of a true relative amplitude property of the destretched wavelet spectra to a corresponding true relative amplitude property of the stretched wavelet spectra. Finally, the true relative amplitude scaling factors are applied to the destretched trace spectra to arrive at true relative amplitude destretched seismic traces.

Systems and methods are provided for ultrafast optical waveform sampling based on temporal stretching of an input signal waveform. Temporal stretching is performed using a time lens based on four-wave mixing in a nonlinear medium. The signal is passed through an input dispersive element. The dispersed signal is sent into the time lens, which comprises a chirped pump pulse and a nonlinear medium. The chirped pump pulse is combined with the signal. The four-wave mixing process occurs in the nonlinear device or medium, which results in the generation of a signal at a new optical frequency (idler). The idler is spectrally separated from the signal and pump pulse using a bandpass filter and sent into an output dispersive element. The output dis persive element is longer than the input dispersive element and the temporal stretching factor is given by the ratio between the dispersions of these two elements.

The invention discloses an assisted power controlling method for an electric power assisted steering system. The method includes the steps that a microprogrammed control unit (MCU) collects a torque signal and a vehicle speed signal of a steering wheel to calculate to obtain power assisted motor target electric current Im of the power assisted steering system and meanwhile, collects current actual electric current Ireal of a power assisted motor; stretch factors alpha (e) and alpha (ec) of an input domain and stretch factors Beta (e, ec) of an output domain are obtained by the aid of control thoughts of a varying domain and a functional expression; a fuzzy control unit is combined with stretch factors of the varying domain to obtain control parameter modification values delta Kp and delta Ki through fuzzy reasoning; the calculation is performed to obtain an incremental value of a duty ratio of pulse-width modulation (PWM) by an incremental PI algorithm, and the motor is controlled in a PWM driving mode to output power assisted torque. By means of the assisted power controlling method for the electric power assisted steering system, defects such as nonlinearity and multiple coupling of the electric power assisted steering system can be effectively overcome by the established fuzzy control strategy, the stretch factors can adjust the domains in an on-line mode, and adaptive ability and control accuracy of the system are improved.

The present invention relates to a wood composite panel having a major planar portion, at least one panel portion, and an inwardly extending contoured portion surrounding the panel portion and interconnecting the major planar portion and the panel portion. The contoured portion defines an inter-relationship between a vector angle and a deep draw depth that achieve a satisfactory stretch factor. The present invention also relates to a door having the disclosed wood composite door facings, and methods of forming the facing and door.

A method for photocopying an original color document reduces the amount of color in the resulting photocopy. This is accomplished by scanning bands of the original document to create image bands, detecting a background color in one or more margins of the document that are within the scanned image bands, determining a stretch factor based on the color in the margins, and then scaling pixel values of the pixels by the stretch factor. The stretch factor may be established in one space, e.g., luminance space, and the scaling may be performed in another space, e.g., RGB, though this is not an absolute requirement. A device capable of performing the foregoing thereby reduces the amount of color ink or color toner consumed when the color background of an original document is not needed in the photocopy.

According to a quasi-cyclic low density parity check code basis matrix construction method, node distribution acquired through optimization of a density evolution algorithm is used, then a stretch factor Z is set, the circle length of the LDPC code check matrix and external message scale of the circle are jointed optimized, finally, a QC-LDPC code basis matrix with excellent performances is generated through extension. Each element in the basis matrix is corresponding to one Z*Z dimensional all-zero matrix, a unit matrix or a cyclic shift matrix of the unit matrix. But in construction of high code rate QC-LDPC code, the contradiction of limitation of matrix row number and maximum line number usually occurs, namely, the maximum line number is greater than the row number. To solve the problem, the invention provides construction of the basis matrix through a method increasing line number through superposition of a plurality of cyclic shift matrixes, namely, multiple cyclic shift matrixes are embedded in a single block matrix. The "superposition" operation is binary addition, the constructed basis matrix not only guarantees the cycle performance of the QC-LDPC code, but also meets the requirement of optimization of codon performance through increase of minimum code distance.

The present document relates to audio source coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), as well as to digital effect processors, e.g. exciters, where generation of harmonic distortion add brightness to the processed signal, and to time stretchers where a signal duration is prolonged with maintained spectral content. A system and method configured to generate a time stretched and / or frequency transposed signal from an input signal is described. The system comprises an analysis filterbank (101) configured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude. Furthermore, the system comprises a subband processing unit (102) configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor 5″. The subband processing unit (102) performs a block based nonlinear processing wherein the magnitude of samples of the synthesis subband signal are determined from the magnitude of corresponding samples of the analysis subband signal and a predetermined sample of the analysis subband signal. In addition, the system comprises a synthesis filterbank (103) configured to generate the time stretched and / or frequency transposed signal from the synthesis subband signal.

The invention provides a method and device for implementing load balance, wherein when a first node overloads, multiple virtual links are selected between the first node and a second node are selected to transmit a service stream to the second node for complete process, and the method for implementing load balance can be used for implementing effective load balance on the multiple virtual links, such as implementation of effective load balance considering a stretch factor and a weight factor. The method for implementing load balance is mainly intended to process the first node for load balance for the service loaded by the virtual links when links are added or cancelled, to use the the new virtual links to load and share the link with currently heaviest load when the virtual links are added, to select the link with lightest load to load the service loaded by the cancelled links when the links are cancelled, and more important to act maximumly without affecting the primary service stream when the virtual links are added or cancelled. Particularly, expandable virtual links and the service weight factor can be used for optimizing load balance based on the service.

A knitted-in band for terminating a raw edge of footless pantyhose has a stretch factor and a thickness for the leg band and a stretch factor and a thickness for the leg portion. The stretch factor of the leg band is approximately equal to the stretch factor of the leg portion and the thickness of the leg band is approximately equal to the thickness of the leg portion.

Aspects of a system and method for processing an image are presented. The method may comprise stretching contrast of an input image based on a distribution of luma values for the input image and a distribution of luma values for a desired output image. The pixels below a specified level of contrast defined by the distribution of luma values for the input image and the distribution of luma values for the desired output image are substantially stretched. The method may also comprise constructing a lookup table of the desired output luma values and stretching a contrast of the input image using the constructed lookup table. The method may also comprise applying linear function and a non-linear function to the distribution of luma values, and applying a stretch factor above a specified level of the distribution and a stretch factor below a specified level of the distribution.

The present invention relates to a method for producing a polyolefin-based porous separator and, more particularly, to a method for producing a separator having improved tensile strength and thermal shrinkage rate by adjusting the stretching factor of a base film during the casting and stretching processes of a separator production process. Also, the present invention relates to a polyolefin-based porous separator having a small difference in tensile strength between the longitudinal direction and the transverse direction of the separator, excellent tensile strength, and improved thermal shrinkage rate and improved puncture strength. Further, the present invention relates to an electrochemical battery, of which the dimensional stability under heat and tension is improved using the separator.

The invention discloses a brand new fully-linear analog multicast method without error correction protection. The method comprises the following steps: performing de-correlation transformation, L shape-based partition and data stretching, whitening transformation and group of pictures (GoP) based interleaving on multimedia data at a transmitting end, and transmitting the multimedia data through a linear modulation wireless communication channel without error correction protection; and performing de-interleaving, anti-whitening, stretching factor estimation based on received data, fitting-based correction factor model correction, reverse drawing and reverse de-correlation transformation on the received data at a receiving end. The method can have the advantages that (1) the fairness is excellent; (2) the 'cliff effect' in metadata transmission does not exist, and better robustness and a longer transmission distance are achieved; (3) digital sideways are avoided, and the computation complexity and memory overhead are lowered; (4) metadata transmission is not required, and the bandwidth occupation is reduced; and (5) better image quality is achieved in a circuit with a high packet loss rate.

The invention relates to a total-absorption PML (perfectly matched layer) method applicable to staggered mesh finite differences. Factors including d / in PML, alpha and k in C-PML (convolutional perfectly matched layer) and m in M-PML (multiaxial perfectly matched layer) are integrated to obtain a numerical simulation result matched with a complex highly-deviated well sonic log; respectively fusing stretch factors of X-directional, Y-directional and Z-directional absorbing boundaries in the C-PML and stretch factors of X-directional, Y-directional and Z-directional absorbing boundaries in the M-PML into mixed stretch factors of X-directional, Y-directional and Z-directional absorbing boundaries. The total-absorption PML method applicable to staggered mesh finite differences has the advantages that advantages of C-PML and M-PML are taken by means of parameter optimization, and high efficiency of PML absorbing boundaries in solution of TTI (tilted transverse isotropy) media is realized; accuracy in calculation under the condition of incidence at extreme incidence angles is achieved, and excellent stability can be kept to extreme anisotropic media.

The invention discloses a topology control method for effectively reducing a construction expenditure based on a wireless lossy network. Any network node u in the wireless lossy network performs the following steps of (1) setting a stretch factor t of the wireless lossy network according to user demands; (2) acquiring a maximum transmitting power link data set TABmaxu of the node u; (3) altering a transmitting power broadcasting explorer packet of the node u; (4) initializing an adjacent link data set H of the node u and a shortest path set PATH as null; (5) acquiring a current transmitting power link data set TABku; (6) updating the adjacent link data set H; (7) updating the shortest path set PATH; and (8) sequentially seeking an alternative path for each link from the shortest path set obtained in step (7) so as to determine the transmitting power of the node u in the wireless lossy network. According to the topology control method, the topology construction communication expenditure and time consumption in the wireless lossy network environment are effectively reduced and meanwhile the average transmitting power level is effectively reduced.

The present document relates to audio source coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), as well as to digital effect processors, e.g. exciters, where generation of harmonic distortion add brightness to the processed signal, and to time stretchers where a signal duration is prolonged with maintained spectral content. A system and method configured to generate a time stretched and / or frequency transposed signal from an input signal is described. The system comprises an analysis filterbank (101) configured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude. Furthermore, the system comprises a subband processing unit (102) configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor 5″. The subband processing unit (102) performs a block based nonlinear processing wherein the magnitude of samples of the synthesis subband signal are determined from the magnitude of corresponding samples of the analysis subband signal and a predetermined sample of the analysis subband signal. In addition, the system comprises a synthesis filterbank (103) configured to generate the time stretched and / or frequency transposed signal from the synthesis subband signal.

An auto-stereoscopic monitor and method for the presentation of a three-dimensional scene on an auto-stereoscopic monitor, wherein a number of basic images of a scene is predefined, b) an image mask is predefined for each of the basic images, c) the individual basic images are weighted pixel by pixel or subpixel by subpixel with the values of the respectively associated image mask and are then added to form a raster image, d) the determined raster image is displayed on the screen of the auto-stereoscopic monitor, e) a current normal distance of the viewer from the monitor is determined, and f) a stretch factor is determined as a function of the determined current normal distance and a nominal distance off the screen, wherein the image masks are stretched or compressed in the direction of the horizontal image axis as a function of the stretch factor.

A computer-implemented method of accounting for angle-dependent wavelet stretch in seismic data based on a novel relationship between wavelet stretch and the cosine of a reflection angle of an acoustic ray. Conventional seismic data having at least one wavelet, such as data generated from a reflection seismic survey, is accessed. The data is processed such that at least one wavelet is subject to angle-dependent wavelet stretch. A reflection angle for at least one wavelet is also determined. An operator is utilized to calculate a wavelet stretch factor for at least one wavelet based on the cosine of the corresponding reflection angle of the wavelet. The wavelet stretch factor is applied to the seismic data to account for angle-dependent wavelet stretch.

The invention provides a heating device and plasma processing equipment. The heating device comprises resistance wires, a first base and fixing parts, and the resistance wires are fixed on the first base by the aid of the fixing parts. By the aid of the fixing parts, the resistance wires can be prevented from deviating from preset positions and guaranteed to be uniformly distributed on the first base all the time, and the resistance wires can maintain the same stretch factor, so that heating uniformity of the heating device is improved, and the service life of the heating device is prolonged. The temperature in a reaction chamber of the plasma processing equipment is uniform, and processing quality of processed workpieces can be improved.

The invention relates to a frequency domain finite element total absorption PML method applicable to a TTI medium. A frequency domain finite element total absorption PML boundary condition is constructed, high-precision acoustic logging simulation in a TTI medium complex borehole condition is realized, a numerical simulation result in agreement with the theoretical solution is obtained, and a solid data support is provided for manufacturing of an acoustic logging instrument and evaluation on a complex oil and gas reservoir layer by using the acoustic logging data. Scaling factors of X-direction and Z-direction absorption boundaries in C-PML and scaling factors of X-direction and Z-direction absorption boundaries in M-PML are integrated to be fused to evanescent wave suppression factors and tangential attenuation factors for totally-absorbed X-direction and Z-direction absorption boundaries. The method of the invention has the beneficial effects that through constructing the total absorption PML boundary condition, advantages of the C-PML and the M-PML are considered, and the high efficiency when the frequency domain finite element PML absorption boundary solves the TTI medium is realized. Acoustic logging numerical simulation on a TTI shale formation can be carried out accurately and high efficiently, and essential theoretical basis is provided for the manufacturing of the acoustic logging instrument and development of the shale gas reservoir.

An auto-stereoscopic monitor and method for the presentation of a three-dimensional scene on an auto-stereoscopic monitor, wherein a number of basic images of a scene is predefined, b) an image mask is predefined for each of the basic images, c) the individual basic images are weighted pixel by pixel or subpixel by subpixel with the values of the respectively associated image mask and are then added to form a raster image, d) the determined raster image is displayed on the screen of the auto-stereoscopic monitor, e) a current normal distance of the viewer from the monitor is determined, and f) a stretch factor is determined as a function of the determined current normal distance and a nominal distance off the screen, wherein the image masks are stretched or compressed in the direction of the horizontal image axis as a function of the stretch factor.

The invention relates to a printed board drilling band drawing coefficient data processing method. The printed board comprises a unit plate and a test strip. The data processing method comprises the following steps: 1) On four corners of the test strip, drilling drill holes whose number is one third of a total number of the drill holes as a proportion of 1:1, comparing a hole position deviation so as to calculate a preliminary drilling band drawing coefficient and then executing a step 2; 2) Drilling the drill holes whose number is one third of the total number of the drill holes according to the preliminary drilling band drawing coefficient, comparing the hole position deviation and determining whether the drilling band drawing coefficient accords with a requirement; if the drilling band drawing coefficient accords with the requirement, obtaining the drilling band drawing coefficient; if the drilling band drawing coefficient does not accord with the requirement, executing a step 3; 3) Continuously drilling the residual one third of the drill holes according to the drilling band drawing coefficient of the step 2, comparing the hole position deviation and returning to the step 2. Compared to the prior art, by using the method of the invention, there are the following advantages that cost is saved; the method is visual; a result is accurate and so on.

The invention discloses an upper and low limit accurate estimation and framework determination method for a discretized wavelet transformation family. The method comprises the following steps: step 01: a user collects data while setting a discretized wavelet family; step 02: according to the set scale stretch factor discretization parameter a0, discretizing the frequency f within the range from 1to a0 in order to obtain a series of discretized frequency values f; step 03: using conventional method within the frequency domain to estimate in order to obtain an upper Aold and a lower Bold for the discretized wavelet transformation family; step 04: using a novel method within the frequency domain to estimate in order to obtain an upper limit Anew and a lower limit Bnew for the discretized wavelet transformation family; step 05: obtaining an upper limit A and a lower limit B for the discretized wavelet transformation family by integrating Aold, Bold, Anew and Bnew; step 06: determining whether the discretized wavelet transformation family can form a wavelet framework or not; and step 07: if so, utilizing the framework to carry out data processing. The upper and low limit accurate estimation and framework determination method can be used for determining whether the discretized wavelet transformation family can form the wavelet framework or not and whether the discretized wavelet transformation family can be used for data processing. Meanwhile, the method is featured by being simple in implementation, easy in operation and broad in application scope.

A method for calibrating global translation and linear extension of images. First, the translation parameters of the three corresponding linear displacement boxes in the reference image and the corresponding distortion test image are determined, and then based on the difference between the three box translation parameters, whether there is an extension is detected. If an extension is detected, the Extension coefficient. The base image is carefully adjusted by extending it based on the estimated extension coefficient so that it overlaps with the distorted test image. Then use the finely adjusted extension coefficient to perform an extension operation to shrink the distortion test image, and then align the distortion test image with the reference image to obtain image quality data.

The invention discloses a brand new fully-linear analog multicast method without error correction protection. The method comprises the following steps: performing de-correlation transformation, L shape-based partition and data stretching, whitening transformation and group of pictures (GoP) based interleaving on multimedia data at a transmitting end, and transmitting the multimedia data through a linear modulation wireless communication channel without error correction protection; and performing de-interleaving, anti-whitening, stretching factor estimation based on received data, fitting-based correction factor model correction, reverse drawing and reverse de-correlation transformation on the received data at a receiving end. The method can have the advantages that (1) the fairness is excellent; (2) the 'cliff effect' in metadata transmission does not exist, and better robustness and a longer transmission distance are achieved; (3) digital sideways are avoided, and the computation complexity and memory overhead are lowered; (4) metadata transmission is not required, and the bandwidth occupation is reduced; and (5) better image quality is achieved in a circuit with a high packet loss rate.