1201 results about "Equivalent model" patented technology

A system and a method are provided for performing an integrated uncertainty analysis on a system having interacting modules. The interaction of the modules includes data transfer between the modules with the output of one module being indicative of the input of another module. An uncertainty analysis is performed on each module based on given probability density functions of each input to the module. The uncertainty analysis may include developing a deterministically equivalent model for one or more modules. Data may be provided from one module to another in a uniform format. Thus, two or more modules may be integrated with uncertainties in the inputs of one module being effectively propagated to the inputs of another module. A plurality of modules may thus be modeled as a single integrated system. The integrated system may be replaced with a deterministically equivalent model, preferably of a further reduced order. In this manner, key uncertainties in particular inputs may be isolated. Once these inputs are identified, resources may be effectively allocated to minimize the impact of those inputs on the variability of the results.

The accuracy of neural response recordings in neural stimulators, e.g., cochlear implants, is often degraded by a recording artifact. An idealized electrical-equivalent model of a neural stimulator is created to study, measure and compensate for artifact evoked compound action potential (eCAP). Using this model, the artifact is shown to occur even when the electrical components that make-up the neural stimulator are ideal. The model contains parasitic capacitances between the electrode wires. The model demonstrates that these small parasitic capacitances provide a current path during stimulation which can deposit charge on the electrode-tissue interfaces of the recording electrodes. The dissipation of this residual charge and the charge stored across the stimulating electrode is seen as the recording artifact. The proposed solution for eliminating the artifact problem is realized by utilizing a capacitive electrode material, e.g., TiO2, Ta2O5, or other dielectric coatings or films, instead of Faradaic electrode material, e.g., Platinum (Pt), Pt—Ir alloy or similar alloys, on the neural stimulator electrode lead.

The invention discloses an SOC (Stress Optical Coefficient) estimation method for power batteries based on a RC (Remote Control) equivalent model, which comprises the following steps: determining an estimation equation based on the RC equivalent model and expanding an estimation method of a Kalman filter. The SOC estimation method has the beneficial effects that the charge states of the power batteries can be accurately estimated, and as SOC values directly reflect the states of the batteries, the maximum discharge current of each battery can be limited, the driving mileage of an electric vehicle can be forecasted; and the performance difference among all the batteries in a battery pack can be identified according to the SOC values of the batteries, and equalizing charging is performed to keep the uniformity of battery performance and finally achieve the purpose of prolonging the service lives of the batteries.

The accuracy of neural response recordings in neural stimulators, e.g., cochlear implants, is often degraded by a recording artifact. An idealized electrical-equivalent model of a neural stimulator is created to study, measure and compensate for artifact evoked compound action potential (eCAP). Using this model, the artifact is shown to occur even when the electrical components that make-up the neural stimulator are ideal. The model contains parasitic capacitances between the electrode wires. The model demonstrates that these small parasitic capacitances provide a current path during stimulation which can deposit charge on the electrode-tissue interfaces of the recording electrodes. The dissipation of this residual charge and the charge stored across the stimulating electrode is seen as the recording artifact. The proposed solution for eliminating the artifact problem is realized by utilizing a capacitive electrode material, e.g., TiO2, Ta2O5, or other dielectric coatings or films, instead of Faradaic electrode material, e.g., Platinum (Pt), Pt—Ir alloy or similar alloys, on the neural stimulator electrode lead.

The invention discloses an electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform. The electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform comprises a neutral grounding module, a 10 kV bus, a 10 kV pi-type equivalent model electric transmission line module and a single-phase ground fault module. The electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform can dynamically simulate a single-phase ground fault of an overhead line of different lengths and a cable line of a distribution network in a 1:1 voltage class. The electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform can simulate different neutral grounding modes, such as neutral ungrounding, neutral low-resistance grounding and neutral grounding through an arc suppression coil; transmission lines of different lengths and different types can be simulated, such as the overhead line or the cable line; single-phase ground faults of various types can be simulated, such as metallic grounding, arc light grounding, high resistance grounding and the like; meanwhile, the electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform is provided with a distribution network fault indicator, a line selection and fault positioning device and ports of a DTU / FTU and other distribution network automation terminals, and the requirements for scientific researches, product development, product testing and related personnel operating training in directions of the distribution network single-phase ground fault line selection, traveling wave distance measurement accurate positioning and the like are met.

The invention belongs to the technical field of lithium battery health management, and particularly relates to a combined simulating evaluation method of the state of health and the state of charge ofa lithium battery. A lithium battery equivalent circuit is utilized to describe battery characteristics, and a describing means is provided for a hysteretic phenomenon existing in the relation of open circuit voltage and the state of charge; internal resistance of the battery is introduced to serve as a state variable, the state variable is correlated with the state of health of the battery defined from the aspect of the capacity and the internal resistance of the battery, and thus the current capacity of the battery is updated in real time by updating the internal resistance. In this way, ageing of the battery can be self-adapted, and the high describing precision is maintained all the time. Compared with an existing method, the combined simulating evaluation method can achieve real-timeonline capacity estimation which is difficult to implement by a traditional method, the real-time accuracy degree of the circuit equivalent model is guaranteed, and references are provided for the state of health and the state of charge of the battery.

A method for generating models for simulating the imaging performance of a plurality of exposure tools. The method includes the steps of: generating a calibrated model for a first exposure tool capable of estimating an image to be produced by the first exposure tool for a given photolithography process, where the calibrated model includes a first set of basis functions; generating a model of a second exposure tool capable of estimating an image to be produced by the second exposure tool for the photolithography process, where the model includes a second set of basis functions; and representing the second set of basis functions as a linear combination of the first set of basis functions so as to generate an equivalent model function corresponding to the second exposure tool, where the equivalent model function produces a simulated image corresponding to the image generated by the second exposure tool for the photolithography process.

A method for generating models for simulating the imaging performance of a plurality of exposure tools. The method includes the steps of: generating a calibrated model for a first exposure tool capable of estimating an image to be produced by the first exposure tool for a given photolithography process, where the calibrated model includes a first set of basis functions; generating a model of a second exposure tool capable of estimating an image to be produced by the second exposure tool for the photolithography process, where the model includes a second set of basis functions; and representing the second set of basis functions as a linear combination of the first set of basis functions so as to generate an equivalent model function corresponding to the second exposure tool, where the equivalent model function produces a simulated image corresponding to the image generated by the second exposure tool for the photolithography process.

The invention discloses a ship cabin indoor explosion structure damage evaluation method based on an equivalent scale model. The ship cabin indoor explosion structure damage evaluation method comprises the following steps: obtaining an impact wave pressure curve and a quasi-static pressure curve of explosion of equivalent filling in a scale cabin by adopting a pressure sensor; processing test data to obtain a pressure peak value and corresponding pressure impulse; determining a damage rule of the explosion in the equivalent cabin according to the positive pressure acting time of pressure born by the cabin wall and the natural vibration period of the cabin; dividing damage grades and determining a structure damage threshold value of the equivalent cabin; and evaluating damage effects of a ship cabin structure by taking the structure damage threshold value as the basis. The invention provides the ship cabin indoor explosion structure damage evaluation method based on the equivalent scale model by taking a ship cabin indoor explosion effect scale equivalent model as a test carrier, so that the testing cost can be reduced, the researching period is shortened, and the development and application of anti-ship weapons are effectively supported.