70 results about "Respiration rate" patented technology

The invention discloses a poplar degenerated forest stand accurate restoration method, and relates to the technical field of poplar degenerated forest stand restoration, and the method comprises the steps: obtaining a multi-temporal satellite remote sensing image and an unmanned plane multi-spectral image of a target area; in combination with soil moisture content, rhizosphere respiration rate and micrometeorological data collected by ground Internet of Things sensing nodes arranged in a forest stand, geographic coordinate registration and time sequence alignment are performed on the data to form a multi-source observation data set; the method comprises the following steps: extracting vegetation indexes, short-wave infrared reflectivity, soil moisture and rhizosphere physiological parameters based on a multi-source observation data set, constructing a degradation diagnosis index fusing spectral change, moisture stress and root activity, calculating the degradation degree of each pixel, and generating a degradation level spatial distribution diagram; the area with the degradation degree reaching a set threshold value is determined as a to-be-repaired area; and selecting representative poplar individuals in the to-be-repaired area, measuring the photosynthetic ability of the individuals, and calculating the individual competition intensity in combination with the three-dimensional point cloud data.

The invention discloses a soil oxygen dynamic prediction method for precision agriculture, and belongs to the technical field of soil oxygen prediction, and the method comprises the following steps: S1, collecting key parameters of different soil depths in a research area, and S2, calculating a soil oxygen diffusion coefficient according to the key parameters of different soil depths in the research area; s3, calculating the respiration rate of the soil root system; s4, constructing a soil oxygen consumption model; and S5, carrying out iterative calculation to obtain soil oxygen concentration distribution at different moments and different depths. The method can solve the problem that the oxygen concentration of the soil is influenced by complex factors such as moisture, temperature, porosity, root respiration and microbial activity, and provides a scientific basis for precise agricultural irrigation, soil health assessment and oxygenation irrigation strategy optimization.

The invention discloses a modified atmosphere preservation system and method, and aims to improve the preservation suitability of vegetables of different categories and different maturity degrees. The modified atmosphere preservation system comprises a refrigeration house, the in-warehouse sensing unit is used for collecting environmental data in the refrigeration storage in real time; the outside-refrigeration-house sensing unit is used for collecting outside-refrigeration-house environment data in real time; the respiration rate prediction unit performs fruit and vegetable respiration rate prediction calculation according to the environmental data in the refrigeration house; and the set point vector calculation unit is used for performing system energy consumption prediction calculation based on the cold storage external environment data and the cold storage internal environment data, performing optimal solution calculation of the comprehensive optimization index according to an energy consumption prediction calculation result and a fruit and vegetable respiration rate prediction calculation result, and performing optimal solution calculation of the comprehensive optimization index according to an optimal solution calculation result of the comprehensive optimization index. Outputting an optimal environment parameter set point vector; the decoupling compensation unit is used for performing error calculation according to the in-library environment data and the optimal environment parameter set point vector; and the PID control unit is used for generating a control signal according to an error calculation result.

A method for contactless vital sign monitoring includes transmitting, via a transceiver, radar signals for object detection. The method also includes generating a clutter removed channel impulse response from received reflections of the radar signals a portion of which are reflected off of a living object. The method further includes identifying a set of range bins corresponding to a position of the living object. Additionally, the method includes identifying a first set of signal components representing a respiration rate of the living object and a second set of signal components representing a heart rate of the living object.

Embodiments of the invention describe systems (110) and methods (400) for monitoring ripening of perishable items (104) stored within a container (102). The method (400) comprises measuring (402) one or more environmental parameters within the container (102) at pre-determined time intervals. Further, the method (400) comprises determining (404) a respiration rate associated with each of the perishable items (104) based on the measured one or more environmental parameters. Further, the method (400) comprises determining (406), based on the determined respiration rate and a ripening database (204a), an initiation time for initiating ripening of the perishable items (104). Furthermore, the method (400) comprises triggering (408) the ripening of the perishable items (104) at the initiation time.

In some examples, a non-transitory computer-readable medium stores executable code, which, when executed by a processor, causes the processor to receive a video of at least part of a human torso, use a neural network to produce multiple vector fields based on the video, the multiple vector fields representing movement of the human torso, and determine a respiration rate of the human torso using the multiple vector fields.

The invention discloses a method for evaluating the stress level of shellfish emaciation syndrome, and belongs to the technical field of aquaculture. According to the method for evaluating the stress level of the shellfish emaciation syndrome, the respiration rate is used as an indication index of the stress level of the shellfish emaciation syndrome, and the stress level of the shellfish emaciation syndrome is estimated by comparing the respiration rate of shellfish in a natural state in a culture sea area with the respiration rate of the shellfish under normal feeding. And farmers can conveniently take measures in advance to prevent and treat the shellfish emaciation syndrome. According to the method, the physiological indexes of the shellfish are used as indication indexes, so that the problems of low accuracy, high difficulty and incapability of directly reflecting the nutrition stress level of the shellfish in sea area nutrition monitoring are avoided, the blank of accurate evaluation of the filter-feeding shellfish marinating syndrome is filled, and an important technical support is provided for healthy culture of the shellfish.

The invention discloses a determination method for acquiring a denitrification rate based on river dissolved oxygen high-frequency monitoring. The determination method comprises the following steps: S1, constructing a dynamic response model of the river denitrification rate to heterotrophic respiration; s11, carrying out in-situ high-frequency DO observation on different types of rivers, collecting a water sample, and measuring the concentrations of dissolved N2 and O2 in the collected water sample by adopting an MIMS technology; s12, on the basis of the O2 concentration data, the river heterotrophic oxygen respiration rate is calculated through an O2 mass balance model; s13, based on the N2 concentration data, calculating the river denitrification rate through an N2 mass balance model; s14, fitting the obtained series of heterotrophic respiration rates with the denitrification rate to obtain a dynamic response model between the denitrification rate and heterotrophic respiration; and S2, based on field real-time high-frequency monitoring dissolved oxygen observation data, simulating the river denitrification rate through the constructed dynamic response model. According to the invention, the problems that the traditional denitrification rate measurement cost is high and real-time continuous monitoring cannot be realized are solved, and in-situ, real-time and high-frequency monitoring of the denitrification rate is realized.

Embodiments of the present disclosure describe systems and methods for monitoring the maturation of perishable items stored within a container. The method includes measuring one or more environmental parameters within the container at predetermined time intervals. Further, the method includes determining a respiration rate associated with each of the perishable items based on the measured one or more environmental parameters. Further, the method includes determining an initiation time for initiating aging of the perishable item based on the determined respiration rate and an aging database. Further, the method includes triggering curing of the perishable article at the start-up time.

The present application relates to a kind of new air system and control method based on plant and personnel metabolism coupling, the method comprises: according to indoor plant state and personnel metabolism design the maximum fresh air volume and minimum fresh air volume of new air system;Based on minimum fresh air volume, the minimum light intensity of pre-set system is corrected plant net photosynthetic rate and respiration rate to new air system debugging;Based on pre-set minimum light intensity, the plant net photosynthetic rate and respiration rate of corrected, and personnel quantity fluctuation dynamic adjustment fresh air volume;Combining the real-time fresh air volume of new air system carries out feedback type minimum light intensity adjustment, plant net photosynthetic rate and respiration rate back calculation, and dynamic adjustment of fresh air volume.The new air system and control method of the present application, according to indoor CO2 concentration, photosynthetic active radiation intensity and personnel quantity are comprehensively regulated as needed, and carry out feedback type plant net photosynthetic rate analysis and fresh air volume as needed calculation, real-time control new air system, accurate regulation of new air system is realized.

The application discloses a wearable device and a monitoring method and a monitoring device thereof. The monitoring method comprises the following steps: acquiring an acceleration signal and a photoplethysmography (PPG) signal of the wearable device; calculating an activity amount based on the acceleration signal; extracting a respiration signal of an acceleration channel and a respiration signal of a PPG channel from the acceleration signal and the PPG signal respectively, and calculating a respiration rate and a signal quality based on the respiration signal of the acceleration channel and the respiration signal of the PPG channel in combination with a reference respiration rate; and determining an output respiration rate based on the activity amount, the respiration rate and the signal quality, so as to realize respiration monitoring. Thus, the method realizes joint tracking of the respiration rate based on the acceleration signal and the PPG signal, thereby realizing respiration monitoring in daily work and life.

The invention discloses a livestock respiratory rate estimation method, and relates to the technical field of animal health monitoring. The method comprises the following steps: collecting a livestock lung sound stream, segmenting into segments according to a fixed window length, and carrying out initial noise reduction; framing endpoints of the segments are detected, starting points and ending points of inspiration segments are marked, and after a sequence is obtained, a small subset and a large subset are divided according to the number of the inspiration segments; screening the effective inspiration section by using the expiration average duration time in the less set, and screening the effective inspiration section by using the difference value between the time interval of two adjacent inspiration sections and the expiration average duration time and the standard difference value in the more set; after the effective inspiration sections are screened out, the breathing frequency is calculated according to the ratio of the time interval between the head and tail inspiration sections of the target section to the number of effective breathing cycles. The accuracy of livestock respiratory rate detection can be effectively improved.

According to the rice field carbon emission reduction and yield increase synergistic system and method, EC11 bacteria inhibit methane bacteria by occupying ecological niche, and micromolecule water treated by fullerene not only optimizes the soil microenvironment (the volume weight is reduced by 12%), but also can promote the metabolic activity of the EC11 bacteria (the respiration rate is increased by 25%) to form 1 + 1gt; and 2, the synergistic effect is achieved. Meanwhile, a carbon monitoring and trading system is pre-embedded into a planting process, and a'planting and trading 'mode of paddy field carbon assets is realized for the first time.

To provide a biological information detection system, a biological information detection method, and a program capable of measuring biological information such as a respiratory frequency and a cardiac rate of a person to be measured with a high degree of precision.SOLUTION: A Doppler data acquisition unit 20 acquires Doppler data indicating a measurement result by a Doppler sensor in a certain period for each of a plurality of Doppler sensors provided toward a person to be measured. A frequency spectrum generation unit 22 generates a frequency spectrum on the basis of the Doppler data indicating a measurement result by the Doppler sensor for each of the plurality of Doppler sensors. A consolidation spectrum generation unit 26 generates a consolidation spectrum on the basis of a part or all of the frequency spectra generated for each of the plurality of Doppler sensors. A biological information generation unit 28 generates biological information on the person to be measured in the period on the basis of the consolidation spectrum.SELECTED DRAWING: Figure 2

A method for computing respiration rate and detecting events in a respiration signal representing the respiration of a monitored patient includes: performing a frequency domain analysis of the respiration signal to identify low frequency portions of the respiration signal that may be caused by one or more artifacts; and performing a time domain analysis to modify thresholds during artifacts to compute respiration rate from the time domain respiration signal. The method may be performed by a physiological monitoring device or a patient monitoring system employing a physiological monitoring device.

Methods and apparatus for measuring biometric data including temperature in head-mounted devices (HMDs). Thermal sensors may also be integrated into the HMD and used to collect thermal data from the surface of the user's face. This thermal data may, for example, be processed to determine core body temperature of the user, or be processed to generate estimates of the user's respiration. The temperature data and / or respiration rate and changes to respiration rate derived from signals from the sensors may be used to generate and present biometric data to the user.

Video cameras capture video images of livestock and transmit the images to a computer. The computer identifies individual livestock based on biometric markings. The computer performs pixel enhancement to amplify breathing motion and calculates a respiration rate. A sudden increase in respiration rate indicates respiratory compromise, such as pneumonia or BRD.

A system for measuring long-distance respiration rate is provided. The system includes a processing unit configured to receive and normalized a sensor output signal. The processing unit is further configured to compute a series of four Discrete Prolate Spheroid window functions. For each of the series of four Discrete Prolate Spheroid window functions, the processing unit is configured to (1) multiply the normalized sensor output signal by the Discrete Prolate Spheroid window function to produce a windowed output signal, and (2) compute a Lomb-Scargle periodogram based on the windowed output signal. The processing unit is further configured to compute a weighted average of the Lomb-Scargle periodograms to produce an averaged periodogram. The processing unit is further configured to compute a frequency corresponding to a peak estimated spectral density on the averaged periodogram. The processing unit is further configured to output breaths per minute data based on the frequency.

The invention provides a method and system for detecting the carbon utilization rate of microorganisms based on a microwell plate respiratory system, and the method comprises the following steps: pre-culturing target microorganisms, and confirming the logarithmic growth phase of the target microorganisms; the method comprises the following steps: inoculating target microorganisms into a plurality of deep holes of a microporous plate respiratory system for culture, wherein each deep hole in the microporous plate respiratory system comprises a bacterial liquid containing a specified carbon source; detecting the initial biomass in the bacterial liquid and the initial carbon dioxide value in the microplate respiratory system at the beginning of culture, and detecting the final biomass in the bacterial liquid and the final carbon dioxide value in the microplate respiratory system at the end of culture; calculating the growth rate of the target microorganisms according to the initial biomass and the end biomass; calculating the respiration rate of the target microorganism according to the initial carbon dioxide value, the end carbon dioxide value and the growth rate; and calculating the carbon utilization rate of the target microorganism according to the growth rate and the respiration rate. The problem that the carbon utilization rate of species level microorganisms is difficult to obtain is solved.

A device including: a sensor capturing an infrared image of a target, recognizing a living body from the captured infrared image, and estimating a body temperature and two-dimensional orientation of the living body; and a radar sensor having a signal acquirer acquiring a reception signal of a reflected wave by the target, a signal separator separating the acquired reception signal into a moving object signal and stationary object signal, a moving object estimator detecting a moving object by estimating a range, velocity, and two-dimensional orientation of the moving object from the moving object signal, and a vital estimator estimating a position, respiration rate, and heart rate of the living body from the stationary object signal on the basis of a detection result of the detected moving object.

The invention relates to an apparatus for determining a respiration rate of a subject. A pressure signal providing unit provides a measured pressure signal of a subject over a time, wherein the measured pressure signal is indicative of blood pulsations and comprises a plurality of pressure pulses, and a processor determines, for a respective pressure pulse of the plurality of pressure pulses (9), a respective dicrotic notch position and determines the respiration rate based on the dicrotic notch positions determined for the plurality of pressure pulses (9). This allows for a very accurate determination of the respiration rate.

The invention relates to a device, system and method for determining a respiration rate of a subject. The presented device comprises an input interface for obtaining a red and / or infrared photoplethysmography, PPG, signal, a feature signal unit configured to extract a first feature sequence from the PPG signal and to generate a first feature signal from the feature sequence, a resampling unit configured to resample the first feature signal with a resampling function to produce a resampled signal with a constant sampling rate and / or to resample a first derivative to produce a resampled first derivative with a constant sampling rate, a transformation unit configured to compute a Fourier transform of the resampled signal to produce a transformed resampled signal or to compute a Fourier transform of the resampled first derivative to produce a transformed resampled first derivative, and an extraction unit configured to extract a first respiration rate from the transformed resampled signal or from the transformed resampled first derivative, wherein the first feature sequence is a sequence of phases of a first harmonic of a heart beat of the subject with respect to a start of the heart beat, and wherein the first feature signal corresponds to the sequence of phases.

An interface receives a signal corresponding to a waveform of physiological information involving cyclic changes from a sensor attached to a subject. A processor causes, in response to the signal, an output device to output information corresponding to an estimated value of a respiration rate of the subject. The processor extracts multiple feature quantities corresponding to respiration of the subject from the signal included in each of multiple time slots. The processor applies frequency analysis processing with respect to each of the feature quantities to acquire multiple preliminary estimation values of the respiration rate. The processor determines the estimated value based on a mode value of the preliminary estimation values.

Provided are a biological information generation system, a biological information generation method, and a program that make it possible to accurately measure biological information such as the respiration rate and heart rate of a subject. A Doppler sensor control unit (30) controls the position of a Doppler sensor (15) such that the Doppler sensor (15) is disposed at one of a plurality of predetermined candidate positions. A reliability calculation unit (36) calculates, for at least one candidate position, the reliability of biological information obtained from Doppler data indicating a measurement result measured by the Doppler sensor (15) disposed at the candidate position, on the basis of the Doppler data. A determination unit (38) determines the measurement position from among the plurality of candidate positions on the basis of the reliability calculated for the at least one candidate position. The biological information generation unit (40) repeatedly executes processing for generating biological information of the measurement subject on the basis of Doppler data indicating a measurement result measured by the Doppler sensor (15) disposed at the measurement position.

A breathing rate estimation system includes at least one radar type sensor installed in a monitoring area, an information processing device configured to execute person detection processing of acquiring sensor data output from the sensor and detecting a person present in the monitoring area using the acquired sensor data and breathing rate estimation processing of estimating a breathing rate of the person, and a display device configured to display the breathing rate of the person estimated in the breathing rate estimation processing. The information processing device determines whether the person is in a specific state based on a detection result of the person by the person detection processing, and executes the breathing rate estimation processing when it is determined that the person is in the specific state.

The invention discloses an inhibitor for inhibiting development of ampullaria gigas eggs and application of the inhibitor. Through medicament screening, a compound mixture of salad oil and acetic acid provided by the invention can effectively inhibit the development of ampullaria gigas egg masses, the optimal ratio of salad oil to acetic acid is 10: 1, and 0.07 g of medicament is applied to 1 g of eggs. Laboratory and field tests show that the inhibition rate of the mixture to ampullaria gigas egg masses reaches 100%. A scanning electron microscope is used for observing the processed ampullaria gigas ovum structure to show that more pores are formed on the surfaces of the ovum masses after the mixture is processed, so that the mixture can enter an embryo easily. Further respiratory action experiments show that the respiratory action of the egg masses treated by the mixture is obviously reduced within 24 hours, which is speculated that the mixture permeates into the egg masses, the respiratory action of the egg masses is inhibited, and the development of the eggs is further inhibited. The invention provides an environment-friendly, efficient and cheap technical means for prevention and treatment of ampullaria gigas.

A method includes obtaining at least one breathing audio sample of a user captured using earbuds worn by the user. The method also includes converting the at least one breathing audio sample to a breathing spectrogram configured as an image. The method further includes processing the breathing spectrogram using a trained multi-task convolutional neural network (CNN) to identify a breathing rate and a breathing depth of the user. In addition, the method includes outputting the breathing rate and the breathing depth of the user.

In some implementations, an apparatus may obtain channel state information (CSI) corresponding to each of a plurality of subcarriers in a set of RF transmissions including at least the plurality of subcarriers. The apparatus may extract phase information of the CSI corresponding to each subcarrier, and determine, for each subcarrier, a spectrum from the phase information of the CSI, where the spectrum includes phase change values of the CSI corresponding to respective subcarriers for a plurality of frequencies. The device may determine a respiration rate according to the spectrum of the CSI corresponding to a set of subcarriers including one or more of the subcarriers, the respiration rate corresponding to a phase change value in the spectrum within a predetermined frequency range of respiration rates. The device may output an indication of the determined respiration rate.

The application provides a respiration rate detection method and device applied to oxygen therapy equipment, and relates to the technical field of medical equipment. The method comprises the following steps: obtaining a target flow signal set of a target oxygen therapy equipment, and standardizing target flow signals in the target flow signal set; performing Fourier transform on the standardized target flow signals to obtain a target amplitude-frequency signal; determining a first target frequency corresponding to a first target amplitude peak in a preset frequency range of the target amplitude-frequency signal, and determining a corresponding first target respiration frequency range according to a first target respiration rate range of the target oxygen therapy equipment; determining whether a target user accesses the target oxygen therapy equipment according to the first target frequency and the first target respiration frequency range; when it is not determined whether the target user accesses the target oxygen therapy equipment, performing baseline drift detection, interference detection and frequency multiplication detection on the target amplitude-frequency signal in sequence, and determining a second target respiration rate and outputting according to the detection result. The application can reduce the false detection probability.

To count a breathing rate properly.SOLUTION: A breathing rate counting device (10) includes: acquisition means (11) for acquiring biological sound information including a breathing sound; generation means (12) for generating a frequency spectrum from the biological sound information; and calculation means (12) for calculating a breathing rate by specifying a peak corresponding to breathing from the frequency spectrum on the basis of an intensity threshold that is determined in accordance with one or more peak frequencies included in the frequency spectrum.SELECTED DRAWING: Figure 1