65 results about "Decay factor" patented technology

The sentimental significance of a group of historical documents related to a topic is assessed with respect to change in an extrinsic metric for the topic. A unique sentiment binding label is included to the content of actions documents that are determined to have sentimental significance and the group of documents is inserted into a historical document sentiment vector space for the topic. Action areas in the vector space are defined from the locations of action documents and singular sentiment vector may be created that describes the cumulative action area. Newly published documents are sentiment-scored by semantically comparing them to documents in the space and/or to the singular sentiment vector. The sentiment scores for the newly published documents are supplemented by human sentiment assessment of the documents and a sentiment time decay factor is applied to the supplemented sentiment score of each newly published documents. User queries are received and a set of sentiment-ranked documents is returned with the highest age-adjusted sentiment scores.

A system and method for enabling an audio conference server (ACS) to provide an application program with multi-point weight controllable audio conferencing. The ACS manages a plurality of audio conferences, receives audio data from a plurality of audio clients, mixes the audio data to provide distance-based attenuation according to decay characteristics for each sound, and delivers the mixed audio data to a plurality of audio clients. Audio clients include set-top box (STB) audio clients and point source audio (PSA) audio clients. The ACS mixes the audio data by identifying a decay factor. Pre-defined decay factors include an audio big decay factor, an audio small decay factor, an audio medium decay factor, and a constant decay factor. One can also develop a customized decay factor. A weighted value for a source audio client based on the identified decay factor and the distance between the source audio client and a target audio client is determined. A mix table is generated using the weighted values for each source/target audio client pair. Then an actual mix value for each target audio client is calculated using the mix table. The present invention also includes means for refining the actual mix value.

The invention discloses a personalized recommendation method and system based on a probability model and user behavior analysis. The method includes the steps that article information and article attribute information are extracted, and operation behaviors of users on articles are extracted; interest points are obtained according to the article attribute information and the operation behaviors of the users on the articles; user interest similarity is obtained according to the operation behaviors of the users on the articles, and similar users are obtained; a decay factor is obtained according to the operation behaviors of the users on the articles based on the time dimension, and a user model is set up; interest characteristic information, at all dimensions, of the users is obtained according to the user model; after filtering, a recommendation algorithm is adopted to generate results to be recommended, and algorithm fusion is conducted to obtain personalized recommendation results of the users. After original data is preprocessed, the user model is set up, the interest points of the users and essential information acquisition requirements are depicted accurately to provide accurate personalized recommendation, and therefore the problems of information overload and long-tail articles in the network are solved.

Computing the popularity of a source of serial online content based upon a number of subscriptions to the source of serial online content is disclosed. In some embodiments, upon receiving an indication that a subscription to a source of serial online content has been requested, a popularity score for the source of serial online content is computed based at least in part on a decayed count of subscriptions to the source of serial online content over a prescribed time period. In some embodiments, the computation of the popularity score includes time decaying the count of subscriptions by multiplying by a decay factor at prescribed time intervals. In some embodiments, the popularity scores of a plurality of sources of serial online content are sorted and ranked, to generate, for example, a listing of the most popular sources of serial online content.

The invention provides a 3dsMax-based nuclear facility model radiation field dosage simulation method. The method comprises the following steps of: constructing a model by 3dsMax software according to determined nuclear facility parameters, and storing a file in a 3DS format; importing a 3DS nuclear facility model file and obtaining model parameters; decomposing the 3dsMax nuclear facility model into voxels by using an octree method; writing determined voxel parameters and material information into an input card; importing the input card into a point nuclear integration program; calculating an accumulation factor; calculating a mean free path, in a radiation field, of a gamma ray; establishing a flux rate-dosage rate conversion factor, quality decay factors of chemical elements and materials and a single-layer accumulation factor database by utilizing an SQLite database engine; carrying out combined operation on a box by using a Boolean connective operator, and constructing a complicated radiation field geometric structure; and calculating a three-dimensional radiation field dosage by using a point nuclear integration method. The method provided by the invention is capable of realizing radiation field dosage calculation of complicated 3dsMax nuclear facility models with sizes, materials and energy parameters.

The invention discloses a device for measuring the bone density through a reference module. The device comprises a digital X-ray imaging device used for collecting a projected image of a measured bone, an image preprocessing device used for preprocessing the image containing the measured bone, an image segmenting processing device used for segmenting the preprocessed image of the measured bone, a bone decay factor calculating device used for calculating bone decay factors of an irradiated part according to the decay characteristic of an X-ray and a bone density equivalent analysis device, wherein the bone density equivalent analysis device enables a m (x,y) value to correspond to an area with the same m (x,y) value in the image formed by a reference module with a known equivalent bone density value, and the equivalent bone density value of the corresponding reference module area is a bone density value of the measured bone part. Compared with a traditional DXA method, the device has the advantages of being high in measurement accuracy, convenient to operate and the like.

The invention relates to the field of identification of electric power system low-frequency oscillation modes, and in particular relates to an electric power system low-frequency oscillation mode identification method based on Matrix Pencil. Aiming at solving the problem that measured data obtained by ac actual system is usually influenced by site environment and other factors and thereby is signal data with a certain signal to noise ratio, the method proposes to utilize ESPRIT to improve the Matrix Pencil algorithm, decompose a signal space into a signal sub-space and a noise sub-space by directly adopting a data matrix composed of measured data as a basis, accurately estimate a model order, and detect oscillation frequencies, decay factors, oscillation amplitudes, phases and other information of the low-frequency oscillation signals of an electric power system in different oscillation modes, and thereby computational efficiency and low-frequency oscillation identification capability can be effectively improved. The method is applicable to the electrical power systems and other relevant departments for identifying low-frequency oscillation modes of the electrical power systems.

The invention relates to a high-precision star sensor installation matrix in-orbit real-time calibration method. The method comprises the steps that actual measurement installation relation quaternion is resolved, the vector part of the installation relation quaternion is subjected to filtering and calibration, and an installation matrix is resolved by means of the calibrated installation relation quaternion. Accordingly, on the condition that no accurate prior information exists, filter is given by measuring a residual sequence to achieve criterion convergence, if convergence is conducted, a decay factor takes 1, and a parameter R is estimated online so as to avoid criterion convergence failure; if divergence is conducted, the decay factor is resolved in real time, the weight of current beat in the filtering process is adjusted, and the problem that due to the fact that a model is inaccurate, the filer performance is lowered or even divergence is conducted can be effectively solved. Accordingly, real-time caliberation compensation is conducted on the installation matrix, a large amount of measurement information does not need to be stored, the vector of the installation relation quaternion is filtered directly, but not a three-axis euler angle, and an error introduced by reverse triangle resolving is avoided.

A system and method for enabling an audio conference server (ACS) to provide an application program with multi-point weight controllable audio conferencing. The ACS manages a plurality of audio conferences, receives audio data from a plurality of audio clients, mixes the audio data to provide distance-based attenuation according to decay characteristics for each sound, and delivers the mixed audio data to a plurality of audio clients. Audio clients include set-top box (STB) audio clients and point source audio (PSA) audio clients. The ACS mixes the audio data by identifying a decay factor. Pre-defined decay factors include an audio big decay factor, an audio small decay factor, an audio medium decay factor, and a constant decay factor. One can also develop a customized decay factor. A weighted value for a source audio client based on the identified decay factor and the distance between the source audio client and a target audio client is determined. A mix table is generated using the weighted values for each source/target audio client pair. Then an actual mix value for each target audio client is calculated using the mix table. The present invention also includes means for refining the actual mix value.

A method and system for detecting wind noise are adapted to determine whether two of a plurality of sound signals acquired by a plurality of sound receiving units include wind noise. The method includes the following steps: (a) transforming the two sound signals to their corresponding digitized sound signals including a plurality of sound frames; (b) calculating a correlation coefficient of each pair of the corresponding sound frames from the two digitized sound signals; (c) subtracting one of the digitized sound signals from the other, and transforming the resultant digitized sound signal to frequency domain; (d) selecting a frequency bin in frequency domain for each of the sound frames to serve as a frequency boundary, and calculating a dB difference, a low-frequency energy decay factor, and a low-frequency ripple number of each of the sound frames according to the frequency boundary; and (e) determining whether the correlation coefficient, the dB difference, the low-frequency energy decay factor, and the low-frequency ripple number of a respective sound frame comply with a predetermined determination rule, the two sound signals being determined to include wind noise if affirmative.

The invention discloses a method for acquiring a DC contactor equivalent service life, and the method is invented for the effective early warning of the service life of a DC contactor or a relay. The method comprises the following steps of dividing the load current of a DC contactor into a plurality of current intervals according to the number frequency characteristic of an estimating connection/disconnection power switch; obtaining the sacrificed life value of the DC contactor corresponding to each of the current intervals according to the number frequency characteristic of the estimating connection/disconnection power switch, and obtaining the life decay factor corresponding to each of the current intervals; obtaining a current value when the DC contactor carries out action, and determining the current interval to which the current value belongs and the life decay factor corresponding to the current interval to which the current value belongs; and obtaining the actual equivalent service life value of the DC contactor by using life decay factor corresponding to the current interval to which the current value belongs. The method is suitable for the equipment and device with a large current DC contactor.

The invention discloses a fluid solidification simulation method based on PBF, comprising: S1, initialization data; 2, searching that neighborhood of a fixed radius of the particle; S3, updating the solidification state of the particles; S4, applying the velocity decay factor to the particles, and the intermediate quantity of the position of the particles is calculated; 5, calculating that particle density and the motion constraint quantity; S6, calculating the position change amount of the particles and performing penetration prevention correction; 7, updating that velocity and position of the particles, and deal with the problem of collision between the particles and the boundary; S8, calculating the artificial viscosity and eddy current constraints. The invention also discloses a fluidsolidification simulation system based on PBF. The invention can simulate the speed of different fluid simulations through different particle velocity attenuation factors, and can also correct the particle penetration phenomenon through the position change amount, so as to realize larger scale and more efficient fluid solidification simulation under the support of GPU.

The invention discloses an eight-channel radiometer capable of realizing a self-calibrating function. The radiometer also has a radiation observation and self-calibrating function. The eight-channel radiometer comprises an observation light path, a related photon generating module, a scanning motor module, a multiplexing telescope module, a collimating light path module, a light splitting and gathering light path module, a photoelectric detection and signal processing module. The decay factors of the optoelectronic circuit of the eight-channel radiometer can be evaluated by disposing the related photon calibrating device in the radiometer, and then the periodic correction of the calibration coefficient of the eight-channel radiometer can be realized. The related photon calibrating device is absolute, and the tracing to the high-precision measurement standard is not required, and therefore the higher calibrating precision can be achieved.

The invention discloses a sound wave leakage positioning method based on same-side sensor arrangement. The sound wave leakage positioning method comprises the steps of establishing a leakage positioning model based on sensor same-side arrangement for a to-be-detected pipe section; sound wave sensors are arranged on the same side of the to-be-detected pipe section, and sound wave signals are acquired by the sound wave sensors; operation parameters between the to-be-detected pipe section and the two sensors are acquired, and decay factors between the to-be-detected pipe section and the two sensors are separately calculated according to the operation parameters; and the sound wave signals and the decay factors in the step 2 are substituted into the leakage positioning model to perform leakage positioning. The sound wave leakage positioning method has the beneficial effects that the two sensors are arranged on the same side of the to-be-detected pipe section, so that compared with the mode in the prior art that holes are drilled in the two ends of the pipeline, the danger degree for drilling holes is lowered; and the mode that leakage points are positioned by calculating time differences is not adopted, and only the distances between the two sensors and the tail end or the head end of the to-be-detected pipe section, so that the operability is high, and the safety is high.

The invention relates to the test field of wireless products, and discloses a method and device for testing the stray radiant power of a wireless product. The method comprises the following steps: receiving a wireless signal of a to-be-tested wireless product through a signal receiver, and reading a power value Rn and a frequency value fn of the wireless signal, wherein the to-be-tested wireless product is placed at a position where a transmitting antenna is located during calibration and is in a normal working state; substituting the frequency value fn in a linear relation between a decay factor Fn and the frequency fn to obtain the decay factor Fn at the frequency; and compensating the decay factor Fn in the power value Rn to obtain a stray radiant power value of the to-be-tested wireless product: ERPn or EIRPn = Rn + Fn. The device for testing the stray radiant power of the wireless product disclosed by the invention comprises a receiving module, a calculation module and an output module. Compared with the prior art, the method and the device improve the test efficiency and reduce the manpower input and the site occupation time of the test item.

The invention discloses an article recommending method and a device based on an ant colony collaborative filtering algorithm, which are used for recommending proper articles for a user according to the favor of the user. The method comprises the following steps: acquiring the information element of user ui and the information element of any article vj based on the rating factor of the article vj and the decay factor of the information element given by the user ui, and calculating the similarity between the user ui and the article vj according to the information element of the user ui and the information element of the article vj; sequencing the similarity obtained by calculating, and recommending articles with high similarity for the user ui. According to the method provided by the embodiment of the invention, modelling is performed according to the fact that the favor of user can be changed along with time by means of a mechanism that the information element is volatilized along with time, so that articles the user really likes can be recommended for the user, and the recommending function of a recommending system is optimized.

Artificial Immune Systems (AIS) including the Dendritic Cell Algorithm (DCA) are an emerging method to detect malware in computer systems. A DCA module may receive an output or signal from multiple indicators concerning the state of at least a portion of the system. The DCA module is configured to combine the plurality of signals into a single signal vector. The DCA module may be configured to sort the received signals based on signal type and magnitude of each signal. The DCA module may then use a decay factor to weight the received signals so that a large number of “nominal” signals do not drown out a small number of “strong” signals indicating a malware attack. The decay factor may be exponentially increased each time it is applied so that all received signals are considered by the DCA module, but so that the “nominal” signals may have a minimal effect.

The invention relates to a target tracking method based on a cubature strong tracking information filter. The method includes: estimating one-step prediction target state; iteratively computing a pseudo-observation matrix, an innovation matrix, an information matrix and an information state vector; and calculating optimal linear estimation of the target state and error covariance of the optimal linear estimation. According to the method, a decay factor can be obtained by iterative computing of the pseudo-observation matrix with no need for computing Jacobi matrix. In addition, a time-varying decay factor based on latest update is introduced, the CSTIF (cubature strong tracking information filter) has high strong tracking capacity and is well robust while tracking target state mutates and a system model is inaccurate.

The invention provides a method for evaluating the heat protection level of protective fabric and protective clothes. The method for evaluating the heat protection level of the protective fabric includes the steps that the protective fabric is placed on a fabric heat protection performance tester, the front face of the fabric faces a simulated heat source, and the back face of the fabric is provided with a copper sheet heat flow meter used for recording the temperature of the back face of the fabric; the copper sheet heat flow meter on the back face of the fabric collects data of a heat exposure period t10 and data of a cooling period t20 after heat exposure; heat absorbed by the copper sheet heat flow meter within the whole data collection period of time t10+t20 is calculated; heat needed by a second-degree skin burn is predicted according to the Stoll burn rule; the heat absorbed by the copper sheet heat flow meter is compared with the heat needed by the second-degree skin burn and predicted according to the Stoll burn rule, the maximum decay factor of the second-degree skin burn is calculated, and the average value of three times of testing is taken to judge the heat protection level of the protective fabric. Uniform indexes are adopted for evaluating the heat protection level of the fabric and the clothes.

The invention discloses an electronic dispersion compensation (EDC) method for a high-speed optical communication system. The method comprises the following steps: firstly, configuring a phase multi-threshold excitation feedback structure network by means according to a multi-phase modulation optical communication system model; then designing a phase multi-threshold excitation function, providing the relation between a decay factor and an inflection point in the designed phase multi-threshold excitation function, and showing a solving method; further, designing a brand new energy function to guide the operation of network feedback; and finally in execution, enabling the network not to stop giving feedback until the value of the energy function is minimized and then to exit a loop. The EDC method is mainly targeted at a dispersion compensation occasion of single module value and multiple phases which is the modulation mode adopted by the optical communication system. The EDC method is applicable no matter whether constellation points of the modulation mode are sparse or dense.