15 results about "Activity measurements" patented technology

The invention discloses an activity value measuring method based on closed-loop feedback and an activity meter. The method comprises the following steps: 1) selecting an activity meter with the same model as a target activity meter as a prototype and placing the prototype in a programmable precision incubator; selecting a standard reference source and placing the standard reference source at a measurement position of the prototype; 2) starting an activity meter to measure the activity value of the standard reference source; calculating a compensation factor measured value under the current combination (T, t); 3) establishing a composite mathematical model CF which takes the temperature T and the operation time point t as independent variables and takes the compensation factor CF as a dependent variable, fitting and solving the measured value of each compensation factor to obtain a specific coefficient numerical value of the model CF, and pre-storing the specific coefficient numerical value into a target activity meter; (4) reading the initial temperature by the target activity meter, and loading a pre-stored composite mathematical model, and (5) collecting the current environment temperature, reading the accumulated operation time, calculating according to the collected radiation signal to obtain an original activity measurement value when the target activity meter is used for radioactive activity measurement, and then obtaining a corrected activity value according to the model.

A method of physical activity measurement and analysis, the method comprising computer-executed steps of: receiving at least one value extracted from measurements of a physical activity of a first user, and detecting a deviation of the physical activity of the first user from at least one previous physical activity using the received at least one value and at least one reference value calculated over at least one value extracted from measurements of the at least one previous physical activity.

The utility model relates to the technical field of microbial activity determination, in particular to a biological activity determination device. The biological activity measuring device provided by the utility model solves the technical problem that a biological activity measuring device in the prior art cannot automatically shake uniformly. The biological activity measuring device comprises a base, the sliding table is connected to the base in a sliding manner; by arranging the sliding table and the driving assembly, the motor of the driving assembly can drive the fixer to rotate, and the to-be-detected vessel is fixed in the fixer and rotates along with the fixer, so that a medium in the to-be-detected vessel is shaken up. Meanwhile, the linkage mechanism is arranged, and when the fixator rotates, the linkage mechanism enables the sliding table to do reciprocating motion relative to the base, that is, the fixator also does reciprocating linear motion while rotating, so that the medium in the to-be-detected vessel can be quickly and uniformly shaken, the measurement precision is effectively improved, and the measurement efficiency is improved.

The invention discloses an activity measurement method based on an adaptive coincidence window and dead time correction. The method comprises the following steps: (1) arranging three photomultipliers around a sample to be detected, monitoring three paths of signals generated by the three photomultipliers, and when any path of signal has a rising edge, triggering a self-adaptive coincidence window of which the width is determined by a counting rate R; when R < =, = to ensure that a real coincidence event is captured; at gt; rgt; when R is greater than R, decreasing gradually along with the increase of R so as to reduce accidental coincidence counts; when R > =, = to maximize coincidence efficiency; 2) performing coincidence event judgment in the adaptive coincidence window; the width of the dead time window is adaptively adjusted according to the counting rate R, when R is larger than or equal to R, the width of the dead time window is shorter, and when R is smaller than or equal to R, the width of the dead time window is longer, (4) after the dead time window is finished, normal monitoring is recovered, and (5) when measurement is terminated, the activity of the sample to be measured is reversely deduced through coincidence counting.

This invention describes a system for determining the state of a pelvic disorder in a subject, characterized by abnormal contractile activity of a target pelvic structure. The system includes a sensing module for measuring electrical activity of the subject's pelvis at multiple time points during the subject's hormonal cycle; a signal processing module configured to receive electrical activity measurements from the sensing module and separate electrocontraction parameter measurements representing the target pelvic structure from the electrical activity measurements; and a processor module operatively connected to the signal processing module. The processor is configured to receive the electrocontraction parameter measurements representing the target pelvic structure as input; generate a data profile of the subject containing the electrocontraction parameter measurements representing the target pelvic structure; compare the data profile with the database of reference data profiles containing reference data profiles of subjects with different pelvic disorder states; and output the state of the subject's pelvic disorder based on the comparison. In any embodiment, the signal processing module is configured to separate slow-wave electrocontraction parameter measurements representing the target pelvic structure from the electrical activity measurements. The present invention also describes systems and methods for treating pelvic disorders, including stimulating pelvic structures to normalize their contraction.

According to one aspect, a method for determining an augmented vital sign, such as heart rate or heart rate variability, includes obtaining a signal from a patient when the patient is in both active and inactive situations. An activity signal is generated from a first signal and a physiological signal is generated from a second signal. An activity weight factor is calculated from the activity signal and a vital sign signal is calculated from the physiological signal. A mapping from the activity signal to the vital sign helps determine the vital sign over an entire period of motion. The augmented vital sign is a result of a combination of a first value and a second value, the combination including a product of the activity weight factor and an activity-derived vital sign and a product of the vital sign signal and the activity weight factor less than one.

The utility model discloses a device for measuring the activity of a cobalt-60 industrial source. The device comprises a radioactive source bracket and an activity measuring assembly, wherein the activity measuring assembly and the radioactive source bracket are arranged at an interval. A shielding assembly is arranged on the side, away from the radioactive source support, of the activity measuring assembly and used for absorbing rays penetrating through the detection end of the activity measuring assembly. The activity measurement assembly comprises a detection probe, a ray collimation assembly and an installation sleeve shell arranged on the ray collimation assembly in a sleeving mode. The ray collimation assembly is provided with a ray collimation channel. And the detection probe is arranged at the tail end of the ray collimation channel. The ray collimation assembly comprises a plurality of diaphragms which are arranged at intervals, and the diaphragms made of metal tungsten are adopted, so that rays in other directions can be blocked by the diaphragms made of the metal tungsten when being reflected after being in contact with the inner wall, the rays in other directions are effectively prevented from being received by a detection probe, and the detection accuracy is improved. Therefore, the detection result is prevented from being influenced.

There is provided a ring-type electrodermal activity measurement device including a first electrode, a second electrode and a sensor chip. The first electrode is for contacting a first skin of a first finger, and for receiving a first voltage. The second electrode is for contacting a second skin of a second finger, different from the first finger, and for receiving a second voltage. The sensor chip is coupled to the first electrode and the second electrode, and is to measure a voltage variation of a skin area between the first electrode and the second electrode to detect the electrodermal activity.

A device includes a memory configured to store fit test configuration data associated with a fit test of an audio playback device. The device also includes one or more processors coupled to the memory. The one or more processors are configured to set, based on the fit test configuration data, a test performance frequency of the fit test to a first value. The one or more processors are configured to obtain activity data corresponding to an activity measurement associated with the audio playback device. The one or more processors are also configured to set, based on the activity measurement, the test performance frequency of the fit test to a second value.

The invention discloses a TDCR circular shift wave coupling measurement method under low luminous efficiency, and the method comprises the steps: carrying out the counting measurement of a background solution and a series of quenching sources through a TDCR circular shift wave coupling module, drawing a shift wave quenching correction curve, and further calculating the transition of a sample. The invention also discloses a TDCR circular wave-shifting coupling measurement device under low luminous efficiency, the device comprises a sample bottle and three PMTs which are placed at an included angle of 120 degrees by taking the sample bottle as a center, and the outer wall of the sample bottle is surrounded by an optical coupling silicone oil ring layer and an outer wave-shifting agent layer from inside to outside in sequence. According to the invention, the circular wave shifting module design is adopted, the TDCR technology is combined, so that the Cerenkov measurement efficiency is higher, the device is suitable for activity measurement when the Cerenkov luminous efficiency of nuclides is lower, such as Sr-90 and F-18, the device is matched with multiple bottles of quenching sources to carry out quenching correction, the activity measurement precision is higher, and the stability is better.

The invention provides a nuclide activity measurement method based on a neural network, and relates to the technical field of nuclide activity measurement, and the method comprises the steps: constructing a coincidence measurement system, obtaining a plurality of groups of counting parameters of nuclides under different beta detection efficiencies through the system, and carrying out the correction processing of the counting parameters, and inputting the corrected counting parameter into a one-dimensional convolutional neural network model, and obtaining the nuclide real activity based on a condition that model output extrapolation is performed until beta detection efficiency is 100%. According to the method, the neural network is adopted to replace a traditional extrapolation fitting method, the nonlinear relation between the nuclide counting rate and the activity is automatically learned, the accuracy and robustness of activity measurement are remarkably improved, the method does not depend on an explicit function form, abnormal data can be effectively handled, the accuracy of beta, gamma and coincidence counting rates is ensured, and the method is suitable for popularization and application. The interference of environmental background and cosmic rays is effectively inhibited, the signal-to-noise ratio is increased, the measurement efficiency is improved, the operation is simpler and more convenient, and the method is suitable for various nuclear technology application scenes.

The present invention relates to a radiopharmaceutical dose calculation method and apparatus for pre-injection analysis for imaging. The calculation method comprises: acquiring the current radioactivity of a radiopharmaceutical and a weight and a height of the currently medicated patient; generating a first standard curve on the basis of data in a data lookup table; generating a second standard curve on the basis of a total activity dose formula; and plotting the first standard curve and the second standard curve into a same coordinate system to form two standard curves whose envelopes define a safe medication range and which do not completely overlap, and determining, on the basis of the standard curves, a desired volume of the radiopharmaceutical to be withdrawn for the current injection for the patient. The calculation apparatus can execute the calculation method. The present invention not only improves accuracy of radiopharmaceutical dose calculation, but also significantly improves system operating efficiency and user experience. By means of accurate activity measurement and accurate patient information entry, the system can quickly generate a personalized dose scheme, thereby reducing errors caused by manual operation and improving use safety and effectiveness.

SYSTEM AND METHOD FOR MEASURING MICROBIAL ACTIVITY A microbial activity measurement system comprising a support with a plurality of slots, each slot configured to accommodate the cap of at least one reactor, a stirring device positioned below the support, a transducer positioned above the support, and a displacement device configured to move the transducer. Abstract figure: Fig. 2

Provided is a real-time closed-loop brainstem stimulation system for alleviating hypertension, the system comprising: a nucleus tractus solitarius (NTS) stimulation unit attached to a subject and stimulating the subject's NTS with a preset parameter; an NTS activity measurement unit for measuring NTS activity; and a closed-loop control unit for receiving feedback on the NTS activity measured according to the stimulation by the NTS stimulation unit and controlling the parameter of the NTS.