25 results about "Attenuation function" patented technology

The application discloses a kind of layered foundation in friction type pipe pile vertical flexibility calculation method, comprising: establishing three-layer physical model including pipe pile body, virtual soil pile and pile core soil plug;Based on Hamilton variation principle, the vertical vibration control equation of pipe pile body, virtual soil pile, pile core soil plug is respectively established, and the radial attenuation function control equation describing the radial displacement attenuation law of soil body around pile is established;Boundary conditions and pile-soil continuity conditions are set, and the displacement response expression of pipe pile body, soil body around pile and soil plug is obtained;For the strong coupling problem of pile body displacement and soil radial attenuation function existing in displacement response, iteration algorithm is introduced until convergence;The vertical displacement of pile top after convergence is divided by excitation load amplitude, and the vertical dynamic flexibility of pipe pile is obtained.The application models the pile core soil plug as deformable continuous medium soil column consistent with the layered mode of pipe pile, which is more in line with engineering practice and improves the accuracy of vertical flexibility calculation.

This invention relates to the field of channel communication technology, specifically disclosing a method for improving the communication performance of plasma sheath channels based on fountain code soft decoding. After establishing a plasma channel model, the amplitude attenuation function follows a log-normal distribution, and the phase shift function follows a Gaussian distribution. The probability densities of the amplitude attenuation function and the phase shift function are calculated respectively. Then, combined with the plasma channel model, the conditional probability density of the plasma sheath channel for matched filtering of the received signal is calculated. The log-likelihood ratio in the plasma sheath channel under BPSK modulation of ideal channel information is calculated, as well as the likelihood probability value and log-likelihood ratio of the received signal under unknown plasma sheath channel parameters. This determines the initial values ​​for iteration, which are then used for fountain code soft-decision decoding. This invention enables the reuse of usable information in discarded fountain code packets, thereby further improving the utilization rate of fountain code packets and enhancing the overall communication efficiency of the plasma sheath channel.

This invention proposes a method for assessing driving risks by integrating an independent climate field. The method mainly consists of three parts: First, based on a three-field model of kinetic energy field, potential energy field, and behavioral field in human-vehicle-road collaboration, an independent climate field model is innovatively defined and constructed to characterize the additional driving risks caused by abrupt changes in the environmental medium. Then, by acquiring environmental information such as road surface adhesion coefficient and rainfall intensity, the risk equivalent mass of the climate field source is calculated, and the field strength distribution and attenuation function of the climate field are established based on spatial distance. Finally, the climate field is vector-superimposed with the original three fields to calculate the total driving risk field strength across the entire region. Under the premise of ensuring driving safety, the method achieves advanced warning and risk avoidance decisions for potential accident hazards based on the dynamic change trend of the total field strength. This invention does not change the internal structure of the original three-field model, but supplements the influence of meteorological and road factors on risk characterization through the principle of physical field superposition, effectively improving the safety of intelligent vehicles in complex and extreme environments.

The application discloses a flexible joint with a sound attenuation function and a hydraulic forming method, which comprises a bellows, a flow guide pipe and an outer net. The bellows comprises a corrugated section and a resonant shell section; the flow guide pipe is installed in the bellows and forms a fluid channel inside, the flow guide pipe comprises a hose and an inner liner pipe, the inner liner pipe and the resonant shell section enclose a resonant cavity, and a through hole is formed in the inner liner pipe and communicates the channel and the resonant cavity; and the outer net is wrapped on the outer surface of the bellows. The structure can transmit sound waves to the resonant cavity through the through hole to excite resonance, prolong the sound wave path by using the corrugated structure, promote attenuation, and inhibit secondary noise by combining the outer net, so that excellent sound attenuation effects of multiple levels and wide frequency bands are achieved.

The utility model discloses a zeolite rotary drum device with shock attenuation function relates to environmental protection equipment technical field, including base, runner and drive arrangement, and the vertical fixed support shaft has on base, and runner rotation is installed on support shaft, and the even installation of a plurality of support wheel subassembly has on base, and support wheel subassembly includes the wheel frame fixed on base, the pin shaft installed on wheel frame and the load wheel rotation is installed on pin shaft, and the wheel surface of load wheel supports at the bottom of runner, and the rotating direction of load wheel is along the tangent direction of the circumference of this preset radius, and the gravity sensor is installed on support wheel subassembly for detecting the pressure that this support wheel subassembly bears, and the adjustable position of the circumference of runner is installed with counterweight. Through the even support of support wheel subassembly runner, and the real -time monitoring pressure of combining gravity sensor, can discover the unbalanced situation in time that runner causes the uneven distribution of zeolite and abrasion, through the position of counterweight adjustment, improve the operation stability of equipment.

The application provides a kind of distributed solar photovoltaic support system fault diagnosis method and system, comprising: for the influence of environmental change on fault determination, construct digital twin simulation framework based on support structure parameters, material thermal expansion coefficient and wind load model, generate three-dimensional grid environment-motion response surface, and store the theoretical response boundary in edge node;Real-time acquisition of temperature, wind speed, humidity, environment state fingerprint is generated by hash, and the reference parameter is obtained by table lookup, combined with the actual motion of support, drive motor current and temperature data, the absolute deviation from the reference value is calculated;Through multivariate coupling attenuation function weighted fusion deviation, using short window continuous monitoring and long window ratio analysis, trigger preliminary screening alarm;Then call rule tree causal verification module to distinguish binary between card stagnation and pseudo anomaly, the application can improve the environmental adaptability, realize efficient and accurate early screening of mechanical failure.

The invention provides a method for inverse tone mapping, the method being performed by: obtaining (42) a gain function of a first inverse tone mapping function, referred to as an initial gain function; if (43) an analysis of a current image shows that at least one pixel of the current image having a luminance value at least equal to a predetermined percentage of luminance values (TH1) of the pixels of the current image has an expanded luminance value resulting from the application of the first ITM function to the current image which is higher than a target value, applying (45) to the current image a second ITM function, the second ITM function corresponding to the first inverse tone mapping function in which the gain function has been replaced by a modified gain function derived from the initial gain function in which the gain provided by the initial gain function is attenuated by an attenuation function, the attenuation function being weighted by a weighting factor controlling the intensity of the attenuation, the weighting factor depending on a statistical distribution of luminance values between the maximum luminance value in a histogram of the current image and the luminance value depending on the predetermined percentage.

The application discloses a strong earthquake prediction method and device based on earthquake precursor information, a medium and equipment, and relates to the technical field of earthquake prediction. When the atmospheric tidal gravity signal is determined to be an atmospheric tidal gravity anomaly signal, the atmospheric tidal gravity anomaly signal is input to a gradient boosting machine model constructed in advance, the research area is simulated by spatial partitioning, and the simulated magnitude of each partition is obtained. Then, the energy loss of the signal in the complex medium propagation is compensated by using an attenuation function, and the actual magnitude of each partition is obtained. Further, in combination with the spatial distribution characteristics of regional earthquakes, the distribution of the source risk area is determined, and the strong earthquake prediction result of the research area is output accordingly. On this basis, by introducing a feature contribution degree analysis method, the physical interpretability of the model output is tested, and the influence mechanism of the key features of the abnormal signal on the prediction result is determined. The method improves the accuracy of quantitative prediction of strong earthquakes.

The present application belongs to the technical field of data processing, and particularly relates to a forest microwave remote sensing ground surface dead combustible moisture content monitoring method and system, which comprises the following steps: constructing a soil background scattering prediction model by using historical time series data, and obtaining the soil background scattering coefficient under the current environment; constructing a dielectric and energy coupling balance equation considering the two-way attenuation effect, and introducing a water impedance attenuation function and a water gain scattering function; constructing a residual target function according to the total backscattering coefficient observed by a satellite and the soil background scattering coefficient, and using a constrained interval search algorithm to invert the ground surface dead combustible moisture content. The present application decouples the soil background and the dead combustible signal, solves the problem that the traditional linear additive model is invalid in a humid environment, and realizes the accurate monitoring of the ground surface dead combustible moisture content under complex water and heat conditions.

This invention relates to the field of ultrasonic signal processing, specifically a time-correction gain method, module, and ultrasonic device for phased array ultrasonic equipment. The method first constructs a detection scenario using multiphysics simulation software and acquires simulation data corresponding to different defect depths, material types, and probe types; then, it performs bandpass filtering and Hilbert transform on the data to obtain envelope information for different types of defects; and finally utilizes C... 1 The exponential model is used to analyze the attenuation characteristics of ultrasonic signals at different defect depths and envelope peak values ​​of similar materials. An attenuation function is constructed, and its reciprocal is used as a time-corrected gain function to dynamically compensate the output signal of the phased array ultrasonic equipment, achieving precise gain of the ultrasonic echo. This invention improves the waveform consistency of the ultrasonic echo before and after gain, significantly mitigating the ultrasonic artifact problem present in traditional linear ultrasonic echo gain.

This invention relates to the technical field of medicinal herb image recognition, specifically to a method for sorting and grading Chinese medicinal herbs based on multi-dimensional visual feature fusion. The invention acquires color images of Chinese medicinal herbs on a conveyor belt; calculates the motion blur span based on the conveyor belt speed, camera exposure time, physical field of view width, and pixel width in the direction of motion; combines the effective feature distribution radius and pixel coordinates of the medicinal herbs, and calculates the influence coefficient of each pixel using an attenuation function; calculates the disorder coefficient and absolute gray difference coefficient on the red, green, and blue color channels respectively, thereby obtaining the grayscale evaluation coefficient and weight of each channel; calculates the multi-dimensional similarity between the image to be tested and a standard medicinal herb image, and completes the grading based on this similarity. This invention incorporates industrial site hardware conditions into the algorithm considerations, suppresses edge interference through differentiated influence coefficients, and achieves multi-dimensional feature fusion through dynamic allocation of channel weights, effectively improving the accuracy and robustness of sorting and grading Chinese medicinal herbs.

The utility model relates to a kind of plastic water pipes with sound-absorbing function, belong to plastic water pipe technical field, including water pipe body, the outside of water pipe body is equipped with anticorrosive mechanism, the inside of water pipe body is equipped with sound insulation mechanism;The anticorrosive mechanism includes the reinforcing layer being set in the outside of water pipe body, the outside of reinforcing layer is equipped with heat insulation layer, the outside of heat insulation layer is equipped with connecting layer, the outside of connecting layer is equipped with anticorrosion layer, the reinforcing layer is glass fibre layer, the heat insulation layer glass wool layer, the connecting layer is rigid polyurethane foam plastic layer.This plastic water pipe with sound-absorbing function, by the effect of the mutual cooperation between reinforcing layer, heat insulation layer, connecting layer and anticorrosion layer can improve the heat preservation and heat insulation performance, sound-absorbing performance, structural strength and anticorrosion performance of plastic water pipe, plastic water pipe can be widely applied in chemical industry, construction, agriculture and other fields.

This utility model relates to the field of industrial control technology and discloses a pressure regulating valve assembly with a noise reduction function, including a valve body. The inner wall of the valve body has an inlet groove, and the inner wall of the inlet groove has a sliding groove and a circular groove. The inner cavity of the valve body is provided with a baffle plate and a valve core. By utilizing three sets of arc-shaped metal plates and circular holes in the mounting cylinder, the gas is divided into two streams when passing through the opening of the arc-shaped metal plates, flowing along both sides of the outer wall and forming a vortex. Through the repeated action of multiple sets of structures, the gas flow velocity and turbulence intensity are greatly reduced, which can effectively attenuate noise. At the same time, it is only necessary to push the slider of the mounting cylinder along the sliding groove and rotate it 90 degrees. The ball and the pin automatically complete the locking and fixing. When disassembling, the locking can be released by pulling the pull rod, thereby effectively shortening the installation time. This facilitates targeted maintenance of vulnerable parts such as arc-shaped metal plates and reduces equipment downtime.

This invention belongs to the field of control, specifically a method and system for graded crushing control of construction waste. It includes achieving refined crushing through multimodal sensing and collaborative control, acquiring multi-view texture images of the primary crushing chamber inlet; constructing a gray-level-gradient co-occurrence matrix and analyzing singular value entropy to represent the hardness dispersion of waste components, thereby adjusting the tilt angle of the moving jaw plate; extracting acoustic emission signals from each chamber, reconstructing the energy spectrum using wavelet packet transform, and calculating the KL divergence with the empty energy spectrum as a real-time load index; if the fractal dimension of the final stage aggregate projection profile exceeds the shaping threshold, extracting the secondary chamber load index to construct an attenuation function, generating a frequency correction factor to adjust the eccentric shaft speed, and combining the hardness and load weighted results to collaboratively control the inter-stage screening throughput, thus restoring the fractal dimension. This invention solves the problem of maintaining a balance between crushing throughput and energy consumption in the processing system, enabling intelligent graded crushing of construction waste.

The application discloses a low-altitude economy operation situation three-dimensional visualization and data mapping method based on digital twinning, relates to the technical field of digital twinning and low-altitude airspace intelligent management, and comprises the following steps: collecting multi-dimensional operation data of a low-altitude aircraft to construct a digital twinning body, and deducing a future situation based on a multi-agent simulation engine combined with rules and reinforcement learning; mapping the deduced result to a visual parameter through a confidence attenuation function to realize uncertain coding expression; combining eye movement data and interactive behavior to calculate a cognitive load index and highlight the situation; constructing a stress state index through a physiological signal and triggering authority control and scene load reduction; and realizing dispatcher state visualization and task handover in a multi-seat collaborative scene. The application can improve the low-altitude situation prediction capability and visual expression effect, realize man-machine collaborative optimization and safe scheduling.

This invention relates to a method, system, medium, and device for Q-value estimation based on the attenuation function integral, comprising the following steps: acquiring a reference wavelet and a received wavelet; performing calculations based on the reference wavelet and the received wavelet to obtain the reference wavelet amplitude spectrum and the received wavelet amplitude spectrum; selecting a frequency band based on the reference wavelet amplitude spectrum and the received wavelet amplitude spectrum to obtain a calculation frequency band; determining the center frequency and the attenuation function frequency based on the calculation frequency band; calculating an expression for the attenuation function with respect to the wavelet amplitude spectrum before and after attenuation based on the center frequency, the attenuation function frequency, and a seismic wave attenuation constant Q model; calculating the attenuation function integral within a given frequency band based on the expression; and calculating the formation Q-value based on the attenuation function integral. Compared to the traditional spectral ratio method, this invention avoids amplified noise interference, has higher noise immunity, and significantly enhanced stability.

The application discloses a kind of import energy sea transport channel resilience evaluation and early warning method and system of characteristic double coupling, it is related to international sea transport energy transport safety technical field, this method includes: the multi-source data of target sea transport channel is collected, a plurality of resilience indicators are calculated, and the final dynamic weight of each described resilience indicator is calculated;According to the resilience indicator and the final dynamic weight, the current resilience index of the target sea transport channel is calculated;The time series data of the multi-source data is input into the disturbance intensity pre-judgment model, and the future disturbance intensity of the target sea transport channel is predicted;According to the current resilience index and the future disturbance intensity, the future resilience index is calculated by resilience attenuation function, and early warning is carried out according to the future resilience index.

The present application relates to the technical field of human-computer interaction and computer graphics, and particularly relates to a keyboard lamp effect creation method based on a time function, which comprises the following steps: obtaining a lamp effect intention description text, keyboard backlight layout data and lamp effect playing parameters; performing visual element extraction on the lamp effect intention description text and layer disassembly to obtain a layer set, and determining the layer types and layer effective time windows; determining a parameterized drawing function with frame number as the independent variable according to the layer types and layer effective time windows, and outputting color values, brightness values and continuous spatial positions frame by frame; distributing the color values and brightness values to each light-emitting unit according to a distance attenuation function based on the keyboard backlight layout data to obtain backlight output values; and performing fusion calculation on the backlight output values of each layer in the same frame and outputting a backlight control sequence to a keyboard backlight control interface. The present application realizes the structured generation and cross-layout stable mapping of lamp effect creation, and improves the controllability and playing consistency of lamp effects.

This invention belongs to the field of automatic control and relates to a PLC-based automatic control method and system for dry powder pressure rollers. The method includes: collecting the main motor current, real-time roller pressure, roller gap, and feed screw speed of the pressure roller; calculating state parameters based on the changes in real-time roller pressure and real-time roller gap; using a reference pressure as the target roller pressure, setting a current threshold based on the state parameters; when the main motor current exceeds the limit, calculating the pressure reduction using a nonlinear attenuation function to correct the target roller pressure; based on the deviation between the target roller pressure and the actual roller pressure and the state parameters, obtaining PID control parameters from a preset multidimensional gain surface for calculation to obtain the basic control quantity; simultaneously, combining the feed screw speed with feedforward calculation to obtain the pressure fluctuation prediction compensation quantity; judging the system stability based on the real-time roller pressure change rate; and executing hydraulic control commands by the PLC to achieve precise roller pressure adjustment. This invention can achieve stable roller pressure control, meeting the precision control requirements of high-quality production.

The application belongs to the field of materials, and particularly relates to a crystal structure generation method based on a diffusion model and a self-attention attenuation graph network, aiming to solve the problems of low matching degree of crystal structure generation and target properties and limited prediction accuracy. The method comprises the following steps: obtaining real crystal structure data, and performing feature extraction to construct a crystal structure dataset; inputting the crystal structure dataset into a diffusion model for training under the condition of target material properties; converting the crystal structure dataset into a crystal graph, and inputting the crystal graph into a graph neural network for training; in the message passing process, combining a multi-head self-attention mechanism and a weight attenuation function based on atomic distance to update node features and edge features, so as to obtain a prediction model; inputting target material properties into the trained diffusion model to generate candidate crystal structures; inputting the candidate crystal structures into the trained prediction model to output property prediction values; comparing the property prediction values with the target material properties, and screening to obtain a target crystal structure.

The application relates to the technical field of intelligent manufacturing equipment industry, and particularly discloses a quality safety intelligent management and control data dynamic processing method and system, which comprises the following steps: collecting quality abnormal event data, constructing a dynamic mapping atlas, identifying the risk diffusion track of the quality abnormal event, and extracting a high-risk correlation node group; identifying whether the high-risk correlation node group accelerates the track diffusion, performing quality scheduling imbalance analysis based on interaction data, obtaining an intelligent quality scheduling bias value, and judging whether an algorithm bias early warning needs to be triggered; embedding a dynamic attenuation function to adjust the intelligent quality scheduling weight of a quality safety intelligent management and control platform, and correcting and intervening in the quality abnormal event in the quality safety intelligent management and control platform; improving the efficiency of quality abnormal event source tracking and high-risk node identification, and timely discovering the risk diffusion imbalance problem caused by excessive correlation of a high-sensitivity quality risk label in an intelligent quality scheduling strategy.

The application relates to the technical field of medical informatization, and discloses a bed intelligent scheduling method and system based on dynamic resource planning, which comprises the following steps: acquiring bottom layer data to calculate real-time nursing redundancy, and converting entity sickbeds into four-dimensional real-time resource vectors; generating a patient demand vector, performing a pre-locking operation when a time tolerance threshold is met, and registering a space-time heartbeat timer; performing smooth attenuation calculation on the real-time nursing redundancy by using a computing power tide smooth attenuation function, and adding a repulsion stain attribute to an idle candidate sickbed when the real-time nursing redundancy is not greater than a safety red line threshold; calculating a comprehensive adaptation degree score to complete sickbed allocation; and when a timeout interruption occurs, restoring the real-time nursing redundancy by using a reverse exponential rebound function, and combining a hysteresis interval threshold to cancel the repulsion stain attribute. The application prevents allocation conflicts by pre-locking and four-dimensional characteristics, avoids nursing over-limiting by using nonlinear attenuation and repulsion attributes, and maintains stable synchronization of the bottom layer physical state by virtue of exponential rebound and hysteresis determination.

This invention discloses a method and system for intelligent custom design of towels. The method includes: acquiring gradient color custom patterns and multi-layer jacquard weaving parameters; performing mesh resampling of each layer and extracting initial color balance feature vectors and gradient hue sequence sets; retrieving the washing attenuation function of each layer's yarn color and generating a yarn color attenuation mapping table for each layer; calculating a color balance offset report and a list of gradient zones with discontinuity risk; performing multi-layer exposure ratio decomposition based on the attenuated yarn color and applying hue step uniformity constraints to the gradient zones with discontinuity risk; performing cross-layer floating thread coupling detection and correction; and generating the final weaving control matrix for each layer after color verification and outputting the custom design scheme. This invention is applicable to the field of intelligent custom design of multi-layer jacquard towels.

The application discloses a wind power optimization prediction model and an application method thereof. The model comprises a multi-source data acquisition module, which is used for synchronously collecting meteorological forecast data, fan equipment data and real-time and historical operation data of a wind power plant; a model construction and optimization module, which is used for constructing a wind power prediction model and adaptively optimizing model parameters through a double-dimension closed-loop calibration mechanism. The mechanism comprises a first dimension of dynamically adjusting meteorological factor weight coefficients based on historical deviation and a second dimension of correcting performance attenuation functions based on equipment fault and performance attenuation data. The two-dimension results are used for acting on model parameters after weighted fusion. A prediction output module is used for outputting wind power prediction data and deviation correction control instructions. The application method comprises a prediction method, a transaction optimization method, an equipment intelligent maintenance method and a closed-loop power control method based on the model. The application solves the problems of weak generalization, uncompensated equipment attenuation and low medium and long-term prediction accuracy of existing models.

A computer comprising a system for reducing mechanical rattling or clattering noises resulting from a mechanical coupling of an audio output converter to a part of the computer device, wherein the system comprises: a processing subsystem configured to receive an input audio signal and to output a drive signal to drive the audio output converter in order to generate a converter output, wherein the processing subsystem is configured to selectively apply an attenuation function to the input audio signal in order to attenuate a signal component of the input audio signal at a frequency that causes mechanical rattling or clattering noises in the computer;and an analyzer subsystem configured to receive the input audio signal and output a control signal to the processing subsystem to control the application of the attenuation function to the input audio signal by the processing subsystem based on a spectral content of the received input audio signal; wherein the attenuation function is based on a characteristic acoustic behavior of the computer.