5 results about "Rate curve" patented technology

This application proposes a method and apparatus for detecting aspiration. The method includes: acquiring a first flow rate curve and a second flow rate curve, wherein the first flow rate curve is the pumping flow rate curve of the ventricular assist device (VAD) during the first first cycle when running at a target speed, and the second flow rate curve is the pumping flow rate curve of the VAD during the second first cycle when running at the target speed; calculating a target time-domain deviation and a target frequency-domain deviation based on the first and second flow rate curves; and determining whether aspiration exists in the VAD based on the target time-domain deviation and the target frequency-domain deviation. This application improves the accuracy of aspiration detection by calculating the deviation of the VAD's pumping flow rate in the time domain and frequency domain, respectively.

The application provides a gas filling whole-process data driving optimization method and system and a storage medium, which comprises the following steps: constructing constraint conditions with safety pressure boundary and pressure change rate as cores by monitoring pressure and temperature in real time and calculating state entropy increase gradient; generating an initial filling rate curve by using a generative adversarial network; combining the constraint, efficiency and equipment loss to perform multi-objective evaluation on a discriminator of the network, and adjusting a safety weight in real time according to the entropy increase gradient; and smoothing and optimizing the curve by wavelet transform and nonlinear Kalman filtering, wherein the decomposition layer number and the filtering parameter are both associated with the entropy increase gradient, so that a stable and safe execution rate curve is generated, and intelligent closed-loop control of the filling process is realized.

The application discloses a power distribution area daily line loss rate curve abnormal feature extraction method and system, comprising the following steps: according to the obtained daily line loss rate curve data and area line loss abnormal treatment record work order, an abnormal power distribution area daily line loss rate dataset is constituted; the abnormal power distribution area daily line loss rate dataset is classified according to the abnormal type, and a plurality of abnormal dataset subsets are obtained; local section data of the plurality of abnormal dataset subsets is extracted through a preset scanning window, and local section data corresponding to each abnormal dataset subset is obtained; statistical value features of the local section data are calculated and clustering calculation is performed, a plurality of first abnormal features are obtained; the plurality of first abnormal features are determined according to a self-defined rule, a plurality of second abnormal features are screened out, and abnormal features corresponding to each abnormal dataset subset in the plurality of abnormal dataset subsets are obtained, thereby improving the universality of abnormal diagnosis.

A wire wheel displacement rate simulation method, comprising the following steps: step 0: establishing a coordinate system, importing action arcs and a slider; step 1: obtaining the stroke between two action arcs; step 2: taking three action points R0, R1 and R2 on the action arc; step 3: obtaining the slider radius OD; step 4: setting the slider displacement distance Y; step 5: obtaining the offset angle of the slider and the arc center of one of the action arcs; step 6: calculating the coordinates of the three action points R0, R1 and R2 on the slider center; step 7: calculating the arc and arc intersection coordinates; step 8: taking P(x0, y0) on the slider, judging the y0 region; step 9: calculating the displacement value Q of the P point in the t time period; step 10: calculating the instantaneous speed through Q / t; step 11: looping to step 9 until the slider completes the back and forth movement; step 12: all instantaneous speed sets are combined to form a speed curve; step 13: combining the lift curve and the return curve to simulate the wire wheel displacement rate curve.

The invention discloses an external pricing model construction method. The model construction method comprises the following steps: confirming an external interest rate curve model; establishing a pricing engine model; establishing a scheme model according to the scheme condition; establishing a business detail data model; and establishing a final result model. The method solves the problem that business personnel do not know how to price products for customers, pricing principles, pricing mechanisms, parameters required for pricing and other information, and can quickly obtain guidance prices by obtaining information according to actual conditions of the customers through the use of an external pricing model and method, so that the practical value is very high, and support is well provided for business influence.