417 results about "Attenuation factor" patented technology

A method and system for selectively and variably attenuating audio data are disclosed. A high-volume control value as selected by a user is first received, and this high-volume control value defines a volume output level for high amplitude audio samples. An attenuation factor is then determined by utilizing the high-volume control value. Each sample from an incoming audio data stream is conditionally attenuated with the attenuation factor such that high amplitude audio data get compressed while low amplitude audio data remain unaffected. Finally, the attenuated samples are sent to an output.

A system and method for inspecting an object, the system and method comprising a source for generating a penetrating radiation beam for irradiating the object, the beam having, for each instant of time, an instantaneous energy spectrum of intensity, a shaper for modulating the generated beam, thereby creating a shaped beam, the shaper comprising at least a first section and a second section, the first section attenuating the intensity of a portion of the generated beam by a first attenuation factor and the second section attenuating the intensity of another portion of the generated beam by a second attenuation factor, and at least one detector for detecting the shaped beam after the shaped beam interacts with the object. The source may scan a beam across an object while the source and at least one detector are moving on a platform capable of highway travel or on an inspection module movable with respect to the object.

The present invention relates to a connector which includes a plug unit and a receptacle. The plug unit includes a housing board and a transmission path board. The housing board has a housing board body and first connection terminals and second connection terminals. The transmission path board has a transmission path board body, plural differential signal patterns which are connected to the first connection terminals and the second connection terminals of the housing board, and high pass filters which are connected to each of the differential signal patterns. The receptacle has a receptacle body and pin contacts. According to the present invention, a low-frequency component of a digital signal is attenuated. Thus, since an attenuation factor of the high-frequency component and an attenuation factor of the low-frequency component of the digital signal can be set substantially the same, the digital signal can be transmitted surely.

The invention discloses a big-data-based method and system for establishing and analyzing an e-commerce user portrait of a mobile terminal. The method comprises: offline data of a user are obtained; according to an identification code, data of different data sources are integrated into an offline knowledge base; pretreatment including normalization, discretization and attribute reduction is carried on the offline data; feature extraction is carried out on the offline data based on a customized tag rule and a basic tag of the user is constructed; weight and time attenuation factor processing iscarried out on the tag data and a user portrait offline prediction model based on a QPS cluster algorithm is established; data clustering mining is carried out on the offline knowledge base by usingthe prediction model to obtain an e-commerce user portrait of a mobile terminal; and distributed processing is carried out on online behavior data and then the processed data are integrated with the offline model. Therefore, massive data of the e-commerce transaction of the mobile terminal are analyzed in a big data environment; the real-time user behavior can be analyzed quickly and real-time image fusion is realized; and a multi-dimensional user portrait is built, so that the e-commerce user is analyzed comprehensively.

An aspect of an embodiment or partial embodiment of the present invention (or combinations of various embodiments in whole or in part of the present invention) comprises, but not limited thereto, a method and system (and related computer program product) for continually assessing the risk of hypoglycemia for a patient and then determining what action to take based on that risk assessment. A further embodiment results in two outputs: (1) an attenuation factor to be applied to the insulin rate command sent to the pump (either via conventional therapy or via open or closed loop control) and/or (2) a red/yellow/green light hypoglycemia alarm providing to the patient an indication of the risk of hypoglycemia. The two outputs of the CPHS can be used in combination or individually.

Indicating a spatial location of a virtual sound source by determining an output for each of one or more physical speakers as a function of an orientation of corresponding virtual speakers that track the position and orientation of a virtual listener relative to the virtual sound source in a virtual environment or game simulation. A vector distance between the virtual sound source and each virtual speaker is used to determine a volume level for each corresponding physical speaker. Each virtual speaker is specified at a fixed location on a unit sphere centered on the virtual listener, and the virtual sound source is normalized to a virtual position on the unit sphere. All computations are performed in Cartesian coordinates. Preferably, each virtual speaker vector distance is used in a nonlinear function to compute a volume attenuation factor for the corresponding physical speaker output.

A method and processing device are presented for reconstructing an absorption and/or scattering image of a region of interest inside a scattering medium. A mathematical model is provided being representative of a relation between the distribution of the intensity and phase of electromagnetic radiation components scattered from a medium and a certain attenuation factor, which is function of spatial variations of scattering and absorption coefficients of the medium. The mathematical is used for processing a map of distribution of the intensity of electromagnetic radiation components scattered from known locations within the region of interest, thereby producing a halftone pattern of the region of interest.

The present invention belongs to the field of electric vehicle power battery management systems, and especially relates to an SOH estimation method for a power lithium-ion battery management system. According to the technical scheme of the invention, the method is provided for multiple problems in the current SOH estimation method. Based on the method, the internal resistance enhancing factor of a power lithium-ion battery is estimated through dynamically calculating the DCR of the power battery. Meanwhile, the capacity attenuation factor of the power lithium-ion battery is estimated through dynamically calculating the throughput capacity of the power battery. On the above basis, the internal resistance enhancing factor and the capacity attenuation factor are comprehensively applied to establish the SOH estimation method.

A digital recording device includes a microphone configured to convert collected sound into an analog audio signal; a first analog to digital converter configured to convert the signal converted by the microphone into a digital audio signal; a first memory configured to store the digital audio signal of the first analog to digital converter; an attenuator configured to attenuate the analog audio signal with a predetermined attenuation factor; a second analog to digital converter configured to convert the attenuated signal into a digital audio signal; a second memory configured to store the digital audio signal of the second analog to digital converter; an audio signal generating unit configured to extract the digital audio signal in one of the first memory and the second memory for a required time range according to an amplitude maximum value of the signal, and generate a new digital audio signal; and an audio signal memory for storing the generated digital audio signal.

The invention relates to a virtual 3D replaying method based on an earphone. The method comprises the following steps: setting a parameter of a virtual 3D sound source; calculating an absorption value of air to sound and calculating a sound pressure attenuation factor of the sound; calculating a room pulse response (RIR); calculating a position distance d between each sample point of the RIR and a receiving point, calculating a sound pressure of the original sound source after being transmitted for the d distance according to the d; using a interpolation method to process an absorption coefficient of a metope frequency point so as to obtain the RIR after increasing air attenuation and metope absorption; calculating a level angle and an elevation angle between a sound source point position and a head position so as to select a proximal head correlation transmission function; carrying out convolution on head-related transfer function (HRTF) and the RIR after increasing the air attenuation and the metope absorption so as to acquire binaural room pulse response (BRIR); carrying out the convolution on the BRIR and an input sound signal so as to realize a virtual 3D sound signal based on the earphone. By using the method provided in the invention, an '' inner head '' problem during earphone replaying, a distance direction feeling problem, a room characteristic problem and the like can be solved so as to realize a virtual 3D effect based on the earphone.

An apparatus and method for measuring coefficients of retroreflectance of retroreflective surfaces such as road signs involves use of a modified light based range finder. The apparatus includes a power attenuation factor data base which relates pulse width of received pulses to power attenuation of the transmitted pulses. The range finder calculates target range based on time of flight of light pulses. The apparatus automatically calculates the absolute coefficient of retroreflectance for an unknown reflective surface being measured by comparison of the measurement to a reading with the same instrument of a known reflectance standard. The method involves either recalling a stored standard reference reflectance factor or determining a reflectance factor via the range finder for a sample of retroreflective material with a predetermined coefficient of retroreflectance, and then measuring the distance to an unknown target, determining a power attenuation factor from the received pulse width from the unknown target and then calculating the absolute coefficient of retroreflectance based upon these determined values of power attenuation factor, distance and the reference reflectance factor.

The invention provides a method and a voice collecting system for speech enhancement. The system comprises a microphone collecting device and a chip which integrates the method for the speech enhancement. The method for speech enhancement comprises the following steps of: carrying out frame division and pre-emphasis treatment on the noise-contained speech signal so as to be converted to frequency domains; dividing into a plurality of frequency bands; calculating the signal energies of each channel; calculating the estimation value of the posterior signal-to-noise-ratio and the prior signal-to-noise ratio of the current frame; judging whether updating the estimation value of the noise energy; calculating and processing the attenuation factor of each frequency band so as to obtain the speech signal with enhanced signal-to-noise ratio; and converting the processed speech signal into the time domain and outputting the speech signal.

The invention provides a user behavior data based interest recommending method and device. The method comprises the steps: pre-setting an interest category set, which comprises a variety of interest categories, and time attenuation factors, which respectively correspond to each of k continuous unit time periods, wherein k is a natural number; acquiring a first interest weight to each interest category of an appointed user in each unit time period according to behavior data of the appointed user in the k continuous unit time periods; attenuating the first interest weight to each interest category of the appointed user in each unit time period according to a time attenuation factor corresponding to the first interest weight, so as to obtain an interest feature weight to each interest category of the appointed user in the k continuous unit time periods; carrying out interest recommending on the appointed user according to the interest feature weight of each interest category. According to the method and the device, the accuracy of user interest features can be effectively improved.

A 3-D graphics accelerator for performing lighting operations using operands within a given fixed point numeric range. The 3-D graphics accelerator includes a first computational unit which is configured to compute a value of an attenuation factor usable for performing said lighting operation for local lights. The attenuation factor is represented in floating point format. The first computational unit is also configured to represent the attenuation factor in an intermediate format including a first intermediate value (a scaled attenuation factor value within the given fixed point numeric range), and a second intermediate value (a shift count usable to convert the scaled attenuation factor value back to the original attenuation factor value). The 3-D graphics accelerator further includes a lighting unit coupled to said first computational unit. The first computational unit is further configured to convey the intermediate representation of the attenuation factor to the lighting unit. The lighting unit performs lighting calculations in fixed point, using operands within the given numeric range (such as the scaled attenuation factors). The lighting unit generates intermediate color values as a result of these lighting calculations. The lighting unit then uses the shift count value to shift the intermediate color values by an appropriate amount, thereby generating a final color value. The lighting unit clamps said final color value to a predetermined maximum color value in response to said final color value exceeding said predetermined maximum color value.

A reflective member is fixedly or movably provided near the pupil plane of a projection optical system with which a projection exposure apparatus is equipped. A collimated measuring beam with an exposure wavelength is incident from the object plane side or image plane side of the projection optical system, and the intensity of the beam reflected by the reflective member is detected photoelectrically to measure a value corresponding to the attenuation factor (transmissivity or reflectivity) of the projection optical system or the variation with time of the attenuation factor (transmissivity or reflectivity) of the projection optical system. In accordance with the measurement results, the exposing conditions when a photosensitive substrate is exposed are corrected to avoid the deterioration of the exposure control precision due to the variation of the attenuation factor (transmissivity variation or reflectivity variation) which is caused in the projection optical system and illumination optical system of a projection exposure apparatus which uses ultraviolet illumination light.

The invention provides a method for achieving speech enhancement, which comprises the following steps: performing frame separation and pre-emphasis processing on a noisy speech signal, and transforming the noisy speech signal into a frequency domain; dividing the noisy speech signal into a plurality of frequency bands, calculating the signal energy of each frequency channel, and updating the estimated value of the noise energy; calculating the posteriori signal-to-noise ratio of the current frame, and the estimated value of the priori signal-to-noise ratio; calculating the attenuation factor of each frequency band, and processing the attenuation factor to obtain a speech signal with increased signal-to-noise ratio; and transforming the speech signal after the processing into a time domain, and outputting the speech signal.

Mitigation of nonlinear echoes by dynamic range compression may be provided. An audio output may be evaluated to determine whether nonlinear echoes are interfering with an audio signal. In order to reduce such nonlinear echoes, a dynamic range compression algorithm may be applied to the audio signal prior to output. The signal may be modified according to a compression wave and/or subjected to an attenuation factor.

The invention relates to a method for removing eye electrical artifact in EEG signals, which belongs to the technical field of biological information, relates to the technology of EEG signal collection and pretreatment, and is mainly applied to the pretreatment process of the EEG signal acquisition. The method comprises that principal component analysis is carried out on EEG data containing eye electrical artifact; the components of the eye electrical artifact are determined; 1-8Hz of wave filtering is carried out on the time domain waveform of artifact components; attenuation factors of the eye electrical components in each electrode are calculated by combining regression algorithm and using the time domain waveform of artifact components; the attenuation factors are used for regulating the spatial distribution of the eye electrical artifact components; the regulated spatial distribution of the artifact components is used for removing the eye electrical artifact. The method solves the problems that in the traditional method for removing the eye electrical artifact based on principal constituent decomposition, the principal constituent decomposition is incomplete, and the decomposed eye electrical artifact components contain EEG components. The regulation of the attenuation factors causes that the components containing eye electrical are more easily distinguished.

Various embodiments of the present invention provide systems and methods for data regeneration. For example, a system for regenerating data is disclosed. The system includes a media defect detector that is operable to identify a potential media defect associated with a medium from which an input signal is derived, an attenuation amplitude detector that generates an attenuation factor, and a data detector. The data detector includes a first data path and a second data path. The first data path includes a bank of two or more selectable noise prediction filters and the second data path includes a fixed noise prediction filter and the attenuation factor. The data detector processes a derivative of the input signal using the second data path when the potential media defect is indicated, and processes the derivative of the input signal using the first data path when a media defect is not indicated.

The invention, which belongs to the technical field of image processing and computer vision, provides an image defogging method for eliminating a fog effect in an image effectively to realize image defogging based on depth learning and prior information. According to the image defogging method, an imaging model of foggy weather is expressed as follows: I(x)=J(x)t(x)+A(1-t(x)), wherein the I(x) expresses an image shot on a foggy day, the J(x) expresses a clear image, the A indicates global background light, and the t(x) belonging to a set of [0,1] indicates medium transmissivity; and the medium transmissivity is expressed as follows: t(x)=exp(-betad(x)), wherein the indicates an atmospheric attenuation factor and the d(x) expresses a scene depth. Estimation is carried out based on combination of a deep learning technology with foggy image prior information; and a clear image is restored based on an imaging model by using a reverse compensation technology. The image defogging method is mainly applied to an image processing occasion.