3 results about "Frequency factor" patented technology

Methods and systems are disclosed. The method may include obtaining a first plurality of hydrocarbon source rock samples from a first well and a second plurality of hydrocarbon source rock samples from a second well, each well penetrating a portion of a subterranean region. For each of the first and second plurality of samples obtaining a set of kinetic parameter values, including a discrete distribution of activation energy and a common frequency factor and determining a weighted average activation energy value from the distribution. The method may further include identifying a first chemostratigraphic segment of the first well and a second chemostratigraphic segment of the second well, each based on the weighted average activation values; determining a correlated stratigraphic unit and mapping organofacies based on the first the second chemostratigraphic segments; and predicting hydrocarbon generation, retention and expulsion and determining a drilling target within the correlated stratigraphic unit.

The application discloses a kind of on-line evaluation methods of remaining service life of insulation bus duct, belong to the technical field of electric power equipment.The method comprises: obtaining the reference thermal life parameters of insulating material, including activation energy and frequency factor;Real-time temperature data in operation is obtained according to sampling period;Characteristic life value under current temperature is calculated based on the temperature data using Arrhenius equation, and the ratio of sampling period length and characteristic life value is taken as the thermal aging loss increment of the period;Loss increment is accumulated to historical cumulative thermal aging loss total value;Whether the cumulative value reaches the life termination threshold is judged, and the remaining service life evaluation result is calculated and output when not reached.The application combines thermal aging model with on-line temperature monitoring, to realize dynamic evaluation under variable temperature condition in the form of discrete time sampling and loss accumulation, solves the problem that offline evaluation cannot reflect actual operation condition cumulative aging, algorithm is simple, deployment cost is low, and is suitable for bus duct on-line monitoring.

The invention discloses a modeling method and system for a frequency-dependent giant magnetostrictive actuator. The modeling method comprises the following steps: firstly, establishing a classic PI model; then, a symmetric Play operator in the classic PI model is improved into an asymmetric Play operator, and an improved PI model is obtained; further introducing a frequency factor, representing part of parameters as a frequency function, and constructing a frequency-related improved PI model; the input current and output displacement data under different frequencies are utilized, a nonlinear optimization tool box is adopted for parameter identification, and model parameters are optimized. And finally, comparing the root-mean-square error and the mean absolute error of the model output and the actual output, and verifying the fitting precision of the model under different frequencies. According to the method, the asymmetric hysteresis characteristic and the frequency-dependent hysteresis characteristic of the giant magnetostrictive actuator can be accurately described within the frequency range of 1-90 Hz, and a more accurate theoretical basis is provided for modeling and control of the giant magnetostrictive actuator.