125 results about "Relative energy" patented technology

An audio privacy system reduces the intelligibility of speech in an audio signal while preserving prosodic information, such as pitch, relative energy and intonation so that a listener has the ability to recognize environmental sounds but not the speech itself. An audio signal is processed to separate non-vocalic information, such as pitch and relative energy of speech, from vocalic regions, after which syllables are identified within the vocalic regions. Representations of the vocalic regions are computed to produce a vocal tract transfer function and an excitation. The vocal tract transfer function for each syllable is then replaced with the vocal tract transfer function from another prerecorded vocalic sound. In one aspect, the identity of the replacement vocalic sound is independent of the identity of the syllable being replaced. A modified audio signal is then synthesized with the original prosodic information and the modified vocal tract transfer function to produce unintelligible speech that preserves the pitch and energy of the speech as well as environmental sounds.

Computer implemented speech processing is disclosed. First and second voice segments are extracted from first and second microphone signals originating from first and second microphones. The first and second voice segments correspond to a voice sound originating from a common source. An estimated source location is generated based on a relative energy of the first and second voice segments and/or a correlation of the first and second voice segments. A determination whether the voice segment is desired or undesired may be made based on the estimated source location.

To provide comprehensive (i.e. rapid and sensitive) MS-MS analysis, the inventor employs a time-nested separation, using two time-of-flight (TOF) mass spectrometers. Parent ions are separated in a slow and long TOF1, operating at low ion energy (1 to l00eV), and fragment ions are mass analyzed in a fast and short TOF2, operating at much higher keV energy. Low energy fragmentation cell between TOF1 and TOF2 is tailored to accelerate fragmentation and dampening steps, mostly by shortening the cell and employing higher gas pressure. Since separation in TOF1 takes milliseconds and mass analysis in TOF2- microseconds, the invention provides comprehensive MS-MS analysis of multiple precursor ions per single ion pulse. Slow separation in TOF1 becomes possible with an introduction of novel TOF1 analyzers. The TOF-TOF could be implemented using a static TOF1, here described on the examples of spiratron, planar and cylindrical multi-pass separators with griddles spatial focusing ion mirrors. Higher performance is expected with the use of novel hybrid TOF 1 analyzers, combining radio frequency (RF) and quadratic DC fields. RF field retains low-energy ions within TOF 1 analyzer, while quadratic DC field improves resolution by compensate for large relative energy spread.

Techniques for and apparatus capable of implementing packet detection and signal recognition in wireless communications systems are disclosed. In particular, the disclosed techniques and apparatus incorporate at least one of relative energy detection operable on assessment of a relative energy threshold for an inbound signal borne across an RF channel, carrier sense operable upon on assessment of at least one of a peak-to-sidelobe ratio and peak-to-peak distance defined by the inbound signal, and comparison operable upon demodulated data corresponding to the inbound signal as compared to predetermined preamble data. Clear channel assessment is performed based on determinations undertaken by one or more of the aforementioned relative energy detection, carrier sense and comparison operations.

A method is described for examining a solidifying and/or hardening material such as cement, concrete or the like, using ultrasound waves emitted by an ultrasound transmitter, which penetrate the solidifying and/or hardening material, are continuously measured and analyzed. During solidification and/or hardening of the material, the signal shapes of the ultrasound waves penetrating the material, are recorded. The change with time of the compression wave velocity and/or the relative energy of the ultrasound waves and/or the frequency spectra of the ultrasound waves is extracted from the ultrasound wave shapes during the entire course of solidification and/or hardening of the material. This change with time of the compression wave velocity and/or the relative energy of the ultrasound waves and/or the frequency spectra of the ultrasound waves is approximated through a compensating function, preferably the Boltzmann function. The free parameters of the compensation function are associated with material properties and permit comparison of a current measurement with reference values of these parameters to permit determination of material properties of the examined material. A receptacle and an ultrasound transmitter for carrying out the method also are described.

The invention relates to a solenoid valve fault diagnostic method, especially relates to a fault diagnostic method which is based on a current detection method and uses three-layer wavelet energy decomposition extraction characteristic values and a BP neural network for mode identification. The solenoid valve fault diagnostic method is characterized in that based on characteristics of current step signals, an electricity quantity isolation sensor is connected in series at a solenoid valve drive end for performing three-layer wavelet decomposition on a current change rate; relative energy values are extracted as eigenvectors; then the BP neutral network is used for classifying four kinds of signals, namely normal valve signals, valve core clamp stagnation valve signals, spring fracture valve signals and valve core resetting failure valve signals, and is used for accurately determining relative states of the solenoid valve, including valve core clamp stagnation, spring fracture and valve core resetting failure. Compared with similar products in the prior art, the solenoid valve fault diagnostic method based on current detection has the advantages of easy extraction of signals, high accuracy, low cost and the like.

The invention relates to a failure line selection self-adapting method for a mixed line of a distribution network line-cable by utilizing the relative energy of a characteristic frequency band. The method is as follows: when the instant value of the zero sequence value of a bus is out of limit, a failure line section device instantly starts and records waves; a morphological filter is used for carrying out filter pre-treatment on the transient zero-sequence currents of temporary state of each line; a wavelet packet is applied for decomposing, the characteristic frequency bands of the transient zero-sequence currents of temporary state of each line are confirmed, the component of a stable state and the information of other frequency bands are eliminated and the line selection margin is improved according to the view of energy maximizing; the sizes of the relative energies in the front 1/4 period and the last 1/4 period in the back period of the failure under the characteristic frequency bands are compared according to the principle that the capacitance and current of the failure line under the temporary state attenuates fast in the characteristic frequency bands, thus forming the criterion for failure line selection. Principle analysis and imitation show that the relative energy of the first 1/4 period and the last 1/4 period in the back period of the failure is utilized for realizing the line selection, thus amplifying the temporary characteristics of the failure, avoiding the effect of an intermittent corner on the accuracy of the line section caused by the saturation of CT. The method is accurate and reliable for line selection.

The invention provides a single-phase ground fault section positioning method for a low-current grounding system. The single-phase ground fault section positioning method for the low-current grounding system includes when a single-phase ground fault of the low-current grounding system occurs, recording zero modal current signals in cycles before and after the fault time to obtain zero modal current pure fault component signals; subjecting transient zero modal current pure fault components measured by detectors or automatic feeder terminals on a whole feeder to S-transformation; obtaining transient zero modal current energies of the detectors or automatic feeder terminals at all frequency points, and obtaining sum of transient energies of the frequency points in a frequency of a feeder system; obtaining relative energy entropies of the detectors or automatic feeder terminals; subjecting the relative energy entropies of any two adjacent detectors or automatic feeder terminals to multiple combinations, comparing the combination results, and determining a possible fault section occurring most frequently as a fault section. The single-phase ground fault section positioning method for the low-current grounding system has the advantages of high detection precision and high universality and is widely applicable to power systems.

The invention discloses a high-voltage circuit breaker mechanical state monitoring and fault diagnosis method. The method comprises the following steps of 1) according to the historical fault data statistics result of high-voltage circuit breakers, carrying out an artificial fault simulation experiment on some common high-voltage circuit breakers to obtain fault data; 2) analyzing the fault current data, and extracting the current data characteristic quantity of each mechanism fault to be used as one of state diagnosis classification basis; 3) analyzing a fault vibration signal, adopting wavelet packet decomposition and sample entropy for processing high-frequency and low-frequency components to obtain corresponding wavelet packet relative energy and sample entropy respectively to be usedas vibration signal characteristic quantities; and 4) performing dimensionality reduction on the vibration signal characteristic quantities through principal component analysis to be used as one of state diagnosis classification basis, and carrying out state diagnosis on the circuit breaker by a support vector machine. By adoption of the method, the multi-dimensional information of the fault statecan be effectively utilized, so that the development of multi-parameter multi-dimensional mapping fault diagnosis of the circuit breaker can be promoted.

The invention discloses a hierarchical cluster aviation pump multiple fault diagnostic method based on frequency multiplication relative energy sum. In the method, firstly fault mode effect influence analysis technology is used for carrying out sensor optimal distribution on an aviation hydraulic pump and acquiring sensor signal; then common faults of the aviation hydraulic pump are classified by hierarchical cluster to determine the sequence and hierarchy of fault diagnosis; and finally fault diagnosis of a first diagnosis layer, a second diagnosis layer and a third diagnosis layer is carried out to complete the multiple fault diagnosis on the aviation pump. The method realizes the multiple fault diagnosis of the aviation pump with high accuracy; a extraction method of fault feature and frequency doubling relative energy sum is designed aiming that typical gradual fault of the aviation hydraulic pump is extremely weak at fault initial signature, the method can effectively realize the fault feature extraction of weak signal, and the method is proved to be accurate and efficient by plenty of experiments.

Apparatus and methods for adaptively, reliably, and accurately measuring the frequency of an alerting or other signaling tone. A tone detector measures the frequency of a tone (continuous or pulsed) with a high degree of accuracy (e.g., to within 1 part in 10,000). Two lower order or smaller DFTs measure the energy level in two separate but intersecting frequency ranges. A simple ratio is determined from the relative energy measured from discrete Fourier transforms relating to each of the two separate frequency ranges, and an actual measured frequency is determined.

The invention discloses a fatigue detection method based on multi-source information fusion. Electroencephalogram signals, twinkling information and electrocardiosignals of a testee are synchronously collected by means of an electroencephalogram collecting device and an electrocardiogram collecting device respectively; electroencephalogram signal features including the relative energy of electroencephalogram rhythm waves alpha, beta, theta and delta, electro-oculogram information including twinkling frequency E and twinkling intensity F, and electroencephalogram features including heart rate values HR, LF and HF are extracted; by means of the logistic regression algorithm, the fatigue degrees are primarily divided into three classes, namely, the non-fatigue degree, the mild fatigue degree and the deep fatigue degree, and meanwhile features with large weights are screened according to logistic regression weights for feature fusion; fused feature vectors are classified again by means of the bagging algorithm based on a support vector machine, the processed feature vectors serve as input of the bagging algorithm, and the current fatigue degree of the testee is determined; different fatigue relieving methods are used according to classification results of the fatigue degree of the testee. The method has the advantages of being high in applicability, high in fatigue detection precision, good in improvement effect and the like.

The invention relates to a nonlinear ultrasonic phased array imaging method for micro-crack detection. According to the method, an ultrasonic phased array detection system is utilized to collect the detection signals in the sequence focusing mode and the parallel focusing mode, the appropriate receiving delay tr and the width T of the time-domain intercepting window are determined, the intercepted detection signals are subjected to Fourier transform, the sound kinetic energies Es and Ep of the sequence focusing method and the parallel focusing method and the relative energy difference gamma of the two focusing methods are respectively calculated, and the nonlinear source position is determined according to the gamma, ie., the micro-defect position.

The invention discloses an image self-adaptive method based on visual saliency, comprising the steps as follows: firstly, the energy of an original image is calculated; secondly, a saliency object in the original image are extracted and the relative energy of the saliency object is strengthened; and thirdly, by utilizing a dynamic programming technique, the gaps with the lowest energy on the vertical and horizontal directions in the image are found out and eliminated so as to realize the image self-adaption. As the method eliminates the gaps with the lowest energy in the image, the whole energy loss of the image is the smallest; and as the relative energy of the saliency object is higher, the eliminated gaps can not pass through the saliency object, the saliency object can keep complete after the image self-adaption. Therefore, the method can minimize the image visual effect distortion in intelligent mobile equipment with low resolution and small screen and maintain the completeness of the saliency object, thereby providing a visual effect which is the same as that of display equipment with high resolution.

The invention discloses a fatigue brain electrical characteristic research method based on different experiment difficulties. Mental fatigue is a gradual and cumulative phenomenon, and generally shows weakening of physiological activities of the human body. Fatigue brain electricity under different states is induced by setting two groups of Stroop experiments with different difficulties, and characteristic analysis is carried out on brain electrical signals in a waking state and in a fatigue state in the two groups of experiments by using wavelet packet decomposition and a sample entropy algorithm. Experimental results show that the relative energy of alpha waves and theta waves is increased from the waking state to the fatigue state, the relative energy of beta waves is obviously reduced (P<0.05), the ratio (P<0.05) of parameters alpha/beta and (alpha+theta)/beta is gradually increased along with deepening of fatigue, and sample entropy values of encephalic regions are in decreasing tendency; compared with the experiment group with high difficulty, parameter changes in low-difficulty tasks are more obvious, and therefore the parameters alpha/beta and (alpha+theta)/beta can serve as potential indicators for measuring mental fatigue and meanwhile can verify that proper increase of experiment difficulty can prevent generation of metal fatigue to a certain extent.

The invention relates to a power distribution network fault step type line section method based on spectral kurtosis relative energy entropies. According to the method, when a fault occurs, a first step begins, whether the ratio between a head-wave extremum and a half-wave extremum of the transient state zero-sequence current of adjacent lines is larger than 0 constantly is calculated, if yes, a bus has a fault; if not, the second steps begins for judgment, the spectral kurtosis relative energy entropies of all branch lines are solved, an entropy multiple is calculated, and when the entropy multiple is larger than or equal to a critical value, the line with the largest relative energy entropy in the overhead lines is the fault line; when the entropy multiple is smaller than the critical value, the third step begins, and the line with the largest relative energy entropy in cable lines and a cable-line mixed lines is the fault line. The theoretical analysis and the simulation result show that the method is high in line section accuracy, wide in application range and high in anti-noise capacity.

Provided are a method for processing harmonic interference, and a base station. The method comprises: before resource scheduling is conducted on a user equipment, determining, by a base station, whether a harmonic of an uplink frequency resource which is to be used by the user equipment in a current carrier aggregation scenario will generate harmonic interference to a downlink frequency resource which is to be used by the user equipment; if it is determined that the harmonic interference will be generated, acquiring a transmitting power of the user equipment and a relative energy value of a harmonic component of the uplink frequency resource which is to be used by the user equipment and a principal component, and also being capable of acquiring the channel state quality of the user equipment, and according to the acquired information, determining a change value of the reference signal receiving quality of the user equipment subjected to the harmonic interference; and if the change value of the reference signal receiving quality of the user equipment subjected to the harmonic interference exceeds a preset threshold value, adjusting a scheduling solution of the user equipment. The embodiments of the present invention reduce the interference of harmonic interference when the user equipment receives signals.

The invention relates to a compressed air air-conditioner. The invention belongs to a rotor transducer used for converting energy into power, and relates to an air-conditioning system using an expansion engine to increase the energy of a compressor. The compressed air air-conditioner can be used for adjusting the indoor temperature by cold air generated by expansion of compressed air which is cooled, and is an ideal environment-friendly air-conditioner which has low air specific heat and high relative energy consumption so as not to be used as the common air-conditioner. If the expansion engine with high energy conversion efficiency can recover the compression energy as much as possible, and the energy is only consumed in the aspects of heat exchange and mechanical wear, so that the compressed air air-conditioner has the value of being taken as the common air-conditioner. The compressed air air-conditioner comprises the compressor which is arranged together with the expansion engine in a coaxial way, and a heat exchanger is connected between the compressor and the expansion engine. The compressed air air-conditioner is characterized in that both the compressor and the expansion engine use the rotor transducer. The compressed air air-conditioner has the advantage of adding the advantage of saving energy on the basis of environmental protection.

Carrier frequency selection and handoff initiation methods in wireless communications systems employing multiple carrier frequencies are described. Although the receiver is tuned to a single band, based on the relative energy of one or more beacon signal components corresponding to the currently used carrier and one or more beacon signal components corresponding to an alternative carrier, a carrier selection and a handoff determination is made. Mobile nodes can use a single RF chain with a controllable RF filter to receive and process a signal within a first selected carrier band including components from different transmitters, e.g., a first signal component identified with the first currently selected band and a second signal component identified with a second alternative band. The signal components, e.g., beacon signal components from different transmitters may be obtained from a signal which corresponds to multiple symbol transmission time periods. Separate signal energy measurements are performed on the first and second signal components. The signal component energy is compared, and a determination is made as to whether a handoff should be initiated.

The invention discloses a GPSR (Greedy Perimeter Stateless Routing) random routing method on the basis of the energy-aware. The method is used for routing of a wireless sensor network. The method comprises the following steps of: determining a candidate routing neighbour set of any one routing node, wherein the candidate routing neighbour set is formed by all neighbour nodes with closer distances to a target node than the node; calculating relative energy of each neighbour node in the candidate routing neighbour set of the node; randomly selecting m certain nodes i in the candidate routing neighbour set as next-hop routing nodes of the node by using the relative energy as the probability; and repeatedly carrying out the steps on the nodes i to select next-hop routing nodes of the nodes i until transmit data arrives at the target node from a source node. The invention also provides a GPSR determining routing selecting method on the basis of the energy-aware. According to the GPSR determining routing method, next-hop nodes are selected with reference to the relative energy of the candidate routing neighbour nodes and relative distances between the nodes and the target node according to a set formula.

The invention relates to a phase controlled energy converter array and phase controlling method used for acoustic Doppler current section apparatus, the energy converter array has about 1000 energy converters uniformly distributed in a circular plane at semi-wavelength intervals, it uses the condition that the energy converter array generates grating petals to group all the energy converters, where it uses an group at the center of the energy converter array as a reference group, connects the energy converter in the same relative position of each group in parallel with the relative energy converter in the reference group so as to form 16-channel energy converters, and by controlling the phases and amplitudes of transmitted and received signals of the 16-channel energy converters, realizes four inclined-orthogonal structural phase controlled transmission and reception beams which make an angle of 30 degrees with the vertical line of the phase controlled energy converter array. Its beneficial effects: it largely reduces the size of energy converter array, reduces the cost in producing and manufacturing low-frequency large-depth acoustic Doppler current section apparatus, thus making the acoustic Doppler current section apparatus have better mounting applicability and larger use range.