30 results about "Nonlinear element" patented technology

The present invention relates to a method for measuring the observability of a cat qubit. The quantum system includes a command circuit and a nonlinear superconducting quantum circuit including a nonlinear element and a resonant portion. Each of the nonlinear superconducting quantum circuits has a resonant frequency f a and f b It has first and second modes. The method is a) by a command circuit, frequency f b The method includes (1) delivering microwave radiation to drive a second mode, thereby causing a nonlinear element to operate a jump operator [Equation 1] that stabilizes a two-dimensional manifold hosting a cat qubit (900), (2) mapping a measurement of the observable under measurement to a Pauli operator Z in a cat qubit manifold of a size value whose square coefficient is 2 or greater (910), and (3) measuring the value of the Pauli operator Z (920).

The application discloses a multi-constraint geometric nonlinear level set topology optimization method, device and medium, and aims to solve the problem that the current linear condition level set method is difficult to well optimize the large deformation of a to-be-optimized component. The method divides a design domain corresponding to the to-be-optimized component into a plurality of finite element units, and establishes corresponding level set radial basis functions based on volume constraints; according to the relationship between the element strain increment and the node displacement increment of the finite element unit, displacement constraint terms and frequency constraint terms are introduced to extend the Lagrange function; according to the nonlinear element unbalanced force, the element thermal load and the overall thermal load are calculated; based on the extended Lagrange function and the overall thermal load of the to-be-optimized component under the set temperature, the design domain is topologically optimized. The application considers the displacement constraint and the frequency constraint under the nonlinearity, is suitable for the to-be-optimized component under the large deformation condition, and can achieve an optimal topology result.

This invention provides an analytical method for a two-zone frequency full response model considering nonlinear elements, belonging to the field of analytical analysis of power system frequency response. First, considering the influence of nonlinear elements, a single-machine frequency full response model considering nonlinear elements is established. A piecewise modeling method for nonlinear elements and a full response analysis theory are proposed to achieve analytical analysis. Second, considering the influence of frequency spatiotemporal distribution characteristics, a two-zone equivalent frequency response model is established. An analytical method based on the model's vibration equation is proposed to achieve analytical analysis of regional frequencies. Finally, a two-zone frequency full response model considering nonlinear elements is established to achieve dynamic analytical characterization of the system's frequency response. This invention improves the accuracy of the model's description of the dynamic frequency characteristics of power systems after large disturbances, providing a new approach to solving the frequency security problem of power systems under the coupled influence of nonlinear elements and frequency spatiotemporal distribution characteristics, and contributing to the safe and stable operation of power systems.

In one embodiment, the bridge includes a first magnetoresistive element having a first reference angle, a second magnetoresistive element in series with the first magnetoresistive element having a second reference angle, a third magnetoresistive element in parallel with the first magnetoresistive element having the first reference angle, and a fourth magnetoresistive element in series with the third magnetoresistive element having the second reference angle. The output of the bridge has a linear response over a range of horizontal magnetic field values ​​having non-zero values, with horizontal magnetic field strength values ​​in the range associated with vertical magnetic field strength values ​​having zero Oersted (Oe) values. The reference angle indicates the angle at which the magnetoresistive elements are most sensitive to changes in the magnetic field.

The invention relates to a method for measuring observable quantity of cat quantum bits. A quantum system includes a command circuit and a non-linear superconducting quantum circuit including a non-linear element and a resonant portion. The non-linear superconducting quantum circuit has first and second modes with respective resonant frequency sums. The method comprises: a) delivering (900), by the command circuit, microwave radiation at a frequency to drive the second mode so that the nonlinear element constructs a hopping operator that stabilizes a two-dimensional manifold carrying the cat qubits, b) mapping (910) the observable quantity to be measured to a Fouli operator Z in a cat qubit manifold having a square modulus of magnitude greater than or equal to 2, and c) measuring (920) the value of the Fouli operator Z.

The invention relates to a quantum system (1) for stabilizing Bose quantum bits, said system comprising: an instruction circuit (5) comprising three microwave sources (11, 13, 15), and a nonlinear superconducting quantum circuit (3) comprising a four-wave hybrid nonlinear element (7) and a resonant section (9), the quantum circuit (3) has a first mode having a first resonant frequency and a second mode having a second resonant frequency. The quantum circuit (3) is arranged to design a Hamiltonian H expressed as, by dissipation in the second mode, produce an effective dissipater that stabilizes the Bose quantum bits. To this end, the first microwave source (11) delivers frequency-equal radiation, the second microwave source (13) delivers frequency-equal radiation, and the third microwave source (15) delivers frequency-equal radiation to drive the second mode.

A photonic integrated circuit includes an optical input configured to receive pump radiation, and a plurality of nonlinear elements connected to the optical input. The plurality of nonlinear elements are configured to generate broadband radiation upon receiving the pump radiation. At least two of the plurality of nonlinear elements differ in at least a material and / or a dimension.

An assembly comprising a nonlinear element configured to generate broadband radiation from input radiation coupled into the nonlinear element. The assembly further comprises an optical element downstream of the nonlinear element, the optical element being configured to reflect a portion of the broadband radiation back into the nonlinear element. The nonlinear element is typically a nonlinear optical fiber, such as a hollow-core photonic crystal fiber (HC-PCF).

The present invention relates to a light source for optically pumping a laser active medium (7). The object of the present invention is to provide an improved, and in particular more efficient, pump light source compared to the prior art, in which the pump light is generated by nonlinear frequency conversion. To this end, the present invention proposes that the light source includes a multicore optical waveguide (1), the multicore optical waveguide (1) includes a plurality of photoconductive cores (2) extending along the longitudinal length of the multicore optical waveguide (1). A frequency converter (4) is connected downstream of the multicore optical waveguide (1) in the beampath, the frequency converter (4) is configured to convert a plurality of individual beams (5) emitted from the plurality of cores (2) of the multicore optical waveguide (1) into a plurality of frequency-converted individual beams (6) in a plurality of mutually distinct nonlinear elements of the frequency converter (4), each associated with an individual beam (5). A superimposed optical system is provided to superimpose the plurality of frequency-converted individual beams (6) in the laser active medium (7), thereby optically pumping the laser active medium (7). Finally, the present invention relates to a laser system using such a light source as a pump light source, and a method for optically pumping a laser active medium (7).

A method of measuring self-Kerr in a physical quantum system configured to host a bosonic code qubit, comprises the following operations: 1) providing a physical quantum system configured to host a bosonic code qubit, said physical quantum system comprising (i) a quantum circuit comprising oscillators hosting a buffer or readout mode and a memory mode, and a non-linear element coupling the buffer or readout mode to the memory mode, and (ii) a control circuit configured to apply one or more control signals to the quantum circuit to stabilize the bosonic code qubit in the memory mode and further configured to receive measurement signals from at least the buffer or readout mode, 2) define a coherent state (α) for the memory mode, and, for each of a plurality of coherent state amplitudes and each of a plurality of durations (t), a. prepare, using the control circuit, said coherent state (α) in the memory having one of said plurality of coherent state amplitudes, b. wait for a period of time having one of said duration (t), c. apply, using the control circuit, one or more control signals to said quantum circuit such that the quantum circuit is in a resonant regime | i * ω a - ω b | = j * |ω cs | if said one or more control signals comprise an AC component having an angular frequency |ω cs | or | i * ω a - ω b | = 0 if said one or more control signals comprise only DC components, resulting in an interaction, mediated via said non-linear element, in said physical quantum system which results in a Hamiltonian having a leading term of the general formula Hi,(j,0) α ξ(j,0) (α†)i b + h.c...., where α is the annihilation operator of said memory mode, i is an integer superior or equal to 1, ω a is the angular frequency of the memory mode whilst the quantum circuit is in the resonant regime, j is an integer superior or equal to 1, b is the annihilation operator of the buffer or readout mode, ω b is the angular frequency of the buffer or readout mode whilst the quantum circuit is in the resonant regime, and ξ(j,0) is the strength of said interaction, and d. simultaneously to operation 2)c., using the control circuit, receiving measurement signals comprising at least the mode phase and / or mode amplitude of the buffer or readout mode, 3) derive an effective detuning or a decayed mode amplitude for each coherent state amplitude, by fitting of the measurements of operation 2)d. which are associated with said each coherent state amplitude, 4) derive at least one of self-Kerr coefficients, stark-shift detuning, and memory dephasing rate from the plurality of effective detunings or decayed mode amplitudes of operation 3) by fitting of a function of the absolute magnitude squares of coherent state amplitude in said memory mode.

A method for calibrating a quantum system for stabilizing cat qubits, the quantum system (1) comprising: a non-linear superconducting quantum circuit (3) having a first mode (a) having a first resonant frequency (1) and for carrying the cat qubits, and a second mode (b) having a second resonant frequency (2) and for carrying the cat qubits; the second mode (b) has a second resonant frequency (f) and comprises a nonlinear element (7). The non-linear element (7) is arranged to cause 2-to-1 photon switching between the first mode (a) and the second mode (b) via 4-wave mixing and parametric pumping coupling the first mode (a) and the second mode (b) or via 3-wave mixing and DC biasing coupling the first mode (a) and the second mode (b); and a command circuit (5) for delivering microwave radiation or a current bias to the non-linear superconducting quantum circuit (3) to provide the parametric pumping or the DC bias and a first mode drive, the method comprises the following operations: a) obtaining a set of command circuit operating parameters, each set comprising a pairing of correlating the frequency of the parametric pump with the frequency of the first mode drive when the non-linear element (7) performs 4-wave mixing, or a pairing of correlating the frequency of the parametric pump with the frequency of the first mode drive when the non-linear element (7) performs 3-wave mixing, or a pairing of the parametric pump with the frequency of the second mode drive when the non-linear element (7) performs 3-wave mixing. Comprising a pairing of associating the DC bias value () with a first mode drive frequency (); b) applying the set of command circuit operating parameters to the command circuit during a period of more than 10 ns; c) performing at least one measurement of the group comprising a first mode photon number measurement and a second mode electromagnetic field measurement, d) repeating operations a) to c) until a calibration condition is met, e) deriving a set of calibrated commanded circuit operating parameters based on the measurements obtained in operation c).

A superconducting quantum circuit apparatus includes first through fourth qubits; and a coupler arranged in a region surrounded by a ground plane. The coupler includes: first and second electrodes opposed to each other; and a nonlinear element including at least one Josephson junction bridged between the first electrode and the second electrode between the first and second electrode, the first electrode including first and second opposing portions extended toward the first and second qubits, the second electrode including third and fourth opposing portions extended toward third and fourth qubit, the first through fourth opposing portions having ends for capacitive coupling with the first through fourth qubits, respectively. The ends of the first through fourth opposing portions are disposed within the region surrounded by the ground plane.

This disclosure provides a work machine capable of predicting the precise behavior of each part of an attachment affected by nonlinear elements. [Solution] The shovel 100 is a work machine comprising an upper rotating body as the main body, an attachment provided on the upper rotating body, and a controller 30 as a control device. The controller 30 stores a dynamics model 301 of the attachment and a learning model 302 that outputs the nonlinear elements of the dynamics model 301. The controller 30 predicts the behavior of the attachment using the dynamics model 301, which includes the nonlinear elements output by the learning model 302.

The invention relates to producing time information. Particularly, the invention relates to an optical apparatus and an optical method for producing time information. The optical apparatus comprises a pump pulse generator, a supercontinuum probe generator, a nonlinear element, wherein the nonlinear element is configured to produce a modulated supercontinuum caused by cross-phase modulation between the pump pulses and the supercontinuum probe, and a spectral analyser.

This invention discloses a method for correcting transient measurement errors of CVTs using a digital filter. CVTs, as monitoring devices used to measure grid voltage in power systems, suffer from nonlinear components and are affected by stray capacitance in the windings at high frequencies. This causes oscillating waveforms in the secondary voltage of the CVT during transient processes, disrupting the linear relationship between the steady-state secondary voltage and the primary line voltage. This leads to distortion of the CVT output signal, resulting in a surge in transient voltage measurement errors and reducing the accuracy of the measurement system. Therefore, based on the CVT frequency response curve, an indirect method is used to design a digital filter to correct CVT transient measurement errors. This not only improves the accuracy of transient measurements and suppresses persistent resonance protection measurement systems, but also provides assurance for system relay protection and reliable transient voltage measurement.

The invention belongs to the technical field of vibration reduction of vibrating screens, and particularly relates to an elastic suspension damping system of a vibrating screen and a dynamic parameter analysis method of the elastic suspension damping system. The elastic suspension damping mechanism is connected between the whole screen vibration part and the whole screen base in a suspension manner; the elastic suspension damping mechanism comprises a supporting spring and a damper. According to the system, the damping element is introduced into the elastic suspension damping system, due to the addition of the damper, an original single linear element or a single nonlinear element is added into a composite element formed by combining the elastic element and the damping element, and the vibration reduction effect of the system is greatly improved.

An analog neural network is described comprising: a plurality of layers connected to form an electrical circuit having an input and an output, the input suitable for receiving an electrical signal corresponding to an input example and the output corresponding to an output of the neural network. Each layer comprises elements connected together, where the elements comprise: at least one programmable electronic element representing a weight of the neural network; at least one non-linear element; at least one amplifier block; an error element. Each layer also comprises a measurement element for measuring a change in an electrical signal across the error element.

Microwave detection unit (205) which features: a non-destructive quantum microwave photon detector (100); a quadrature microwave hybrid coupler (210) connected to the non-destructive quantum microwave photon detector; a dispersive nonlinear element connected to the quadrature microwave hybrid coupler; and a measuring unit (255) configured to detect a microwave photon by measuring a non-zero voltage across the dispersive nonlinear element.

A low power analog Long Short-Term Memory (LSTM) recurrent neural network has an input layer, an array of Adaptive Filter Unit for Analog LSTM, a linear projection layer, and an output layer. The output layer has multiple nonlinear amplifiers, a nonlinear element with a sigmoidal input-output characteristic function, and a time-constant adjustable, nonlinear, low pass filter that provides the memory function of the LSTM. The LSTM memory is used with mismatch-robust weights determined by learning by computation of optimal weights values, wherein the objective function minimizes misdetection probability, and used to process a signal to detect events.

The invention relates to the technical field of lightning protection and arc extinguishing, in particular to a line self-arc-extinguishing lightning protection device capable of releasing lightning stroke current, which comprises a main gap, an auxiliary gap, a nonlinear current limiting element, an inductor and a grounding resistor, one end of the main gap is connected with a high-voltage line, the other end of the main gap is connected with one end of the auxiliary gap and one end of the nonlinear current limiting element in parallel, one end of the main gap is directly and fixedly connected with a phase line conductor of the 10kV high-voltage line in a bolt crimping mode, and a connection point is tinned to reduce contact resistance; according to the device, through the structure of main and auxiliary gap isolation and nonlinear element cooperation, the power frequency voltage stress of the zinc oxide valve plate is cut off by using the serial air gaps, and the problem that the traditional lightning arrester valve plate is easy to age is thoroughly solved; the releasing efficiency of lightning stroke current is improved through a cooperative mechanism of main and auxiliary gap dual-channel discharge and inductance triggering; meanwhile, by means of the design of high-resistance current limiting of a nonlinear element and arc extinguishing assisting of a gas production material, power frequency follow current is achieved.

The invention discloses a signal sending device, a signal receiving device and a nonlinear compensation system, and belongs to the technical field of communication. The signal sending device comprises a synchronous data acquisition unit used for acquiring first data from a first link signal and sending a synchronous data acquisition instruction to a signal receiving device through a synchronous control channel of a first link; the signal coding demodulation unit is used for receiving a combined signal sent by the signal receiving device through a second link and obtaining feedback data from the combined signal, and the combined signal comprises a second link signal and the feedback data determined based on the second data; and the pre-distortion processing unit is used for carrying out nonlinear compensation on a signal transmitted through the first link according to a pre-distortion compensation coefficient, the pre-distortion compensation coefficient is determined according to the first data and the feedback data or determined according to the feedback data, and the first link comprises at least one nonlinear element.

This application discloses a method, device, terminal, and medium for electromagnetic transient simulation of nonlinear power systems, relating to the field of electromagnetic transient simulation technology. By introducing a homotopy mapping function and a path tracing mechanism, this solution can effectively avoid the oscillation, cyclic iteration, or divergence problems that easily occur in traditional methods when dealing with power systems containing a large number of power electronic converters and where the current-voltage characteristics of nonlinear components are highly coupled. It achieves reliable solutions for the electromagnetic transient processes of complex nonlinear power systems, ensuring the accuracy and stability of simulation results, thereby supporting in-depth analysis of the transient characteristics of novel power systems. This achieves the invention objective of improving the robustness and reliability of electromagnetic transient simulation for strongly nonlinear power systems.

An optical information processing system comprising a nonlinear element selected in relation to input optical pulses to initiate nonlinear optical frequency conversion and a detection unit, the nonlinear element receiving encoded information input in form of pulsed light, pulsed light from the nonlinear element being read-out by the detection unit for spectro-temporal feature extraction, and the readout being used to train the system on a specific target to obtain a task-specific output or re-directed to the nonlinear element to obtain an input-dependent output, yielding processed information comprising selective positions in an output of the system. A method for training an optical system comprises, for each individual optical input information, reading specific optical amplitude or phase features from specific output bins of the system in time or frequency, weighting and evaluating the specific features towards optimizing user-defined fitness function to identify, classify, or fit the input information.

This invention provides an event-driven method and system for evaluating power system frequency security indicators, applicable to modern power grids containing a high proportion of renewable energy. The method first parameterizes the system's dynamic frequency trajectory using an open-loop decoupling strategy, then constructs an event-driven piecewise analytical model. This model automatically handles high-order dynamics and strictly nonlinear elements within frequency regulation units. By combining the parameterized frequency trajectory with an iterative solver, it accurately calculates key frequency security indicators after a fault, including the time of the frequency minimum, the rate of frequency change, and the quasi-steady-state frequency deviation. This method approximates detailed closed-loop time-domain simulation in terms of evaluation accuracy, while simultaneously improving computational efficiency by tens of times, providing a highly efficient "white-box" analysis tool for online dynamic security assessment and primary frequency regulation reserve optimization.

The invention discloses an energy-frequency integrated selective surface with adjustable frequency band characteristics. The energy-frequency integrated selective surface sequentially comprises a top-layer structure unit, a middle-layer structure unit and a bottom-layer structure unit from top to bottom, the top-layer structure unit and the bottom-layer structure unit are the same or symmetrical in structure and are loaded with nonlinear elements such as diodes and the like; the top layer structure unit and the bottom layer structure unit form a cascade resonance structure through the middle layer structure unit. The interlayer electromagnetic coupling strength is changed by adjusting the thickness of an air layer between the top layer / bottom layer structure unit and the middle layer structure unit, so that the device is switched between a dual-frequency band-pass mode and an ultra-wideband flat band-pass mode; meanwhile, by means of impedance changes of the nonlinear element under different powers, low-loss transmission of signals is allowed under low power, and strong reflection of electromagnetic waves is achieved under high power. According to the invention, the problem that the traditional single structure is difficult to meet the requirements of multi-band reconstruction and high-power protection at the same time can be solved.

The invention relates to the technical field of transformers, in particular to a transformer current rising experiment method, which comprises the following steps of: 1, constructing an equivalent inductance model according to the working frequency, the number of turns, the magnetic core resistance, the leakage inductance resistance and the maximum current response of a transformer; constructing an equivalent capacitance model according to the total impedance of the transformer and the working frequency of the transformer; 2, applying an initial current response according to a rated current response of the transformer, calculating a capacitor current response, and adding a nonlinear element to obtain a nonlinear voltage response; 3, updating the capacitor current response based on the nonlinear voltage response to obtain an updated capacitor current response; step 4, performing asynchronous frequency modulation, and updating the voltage response to obtain an updated voltage response; and calculating an experiment result based on the updated voltage response. According to the invention, accurate simulation and test of the high-voltage large-capacity power electronic power conversion equipment are realized, so that the efficiency and feasibility of equipment performance verification are improved.

A liquid crystal display device having a plurality of picture elements arranged in a matrix including a plurality of rows and a plurality of columns includes a first substrate, a liquid crystal layer, and a second substrate The first substrate includes a first electrode, an insulating layer, and a second electrode in which elongated openings extending along a row direction or a column direction of the plurality of picture elements are provided separately for each of the picture elements. The first substrate further includes a plurality of non-linear elements placed separately in correspondence with each of the picture elements. The liquid crystal layer contains liquid crystal molecules and a chiral dopant. In a plan view, an alignment direction of the liquid crystal molecules beside the first substrate in absence of application of a voltage is placed parallel or orthogonal to a longitudinal direction of the openings.

The method can be applied to a quantum system having a non-linear element coupled to a resonator, the non-linear element having a quantum state changeable between a plurality of quantum states and the resonator having a resonance frequency. The method can include driving the resonator; the resonator resonating at a first frequency in response to said driving the resonator; and simultaneously to said driving the resonator, driving the non-linear element at the first frequency.

In order to take advantage of the characteristics of a display device including an oxide semiconductor, which has excellent operation characteristics and can be manufactured at low temperatures, a protection circuit or the like having an appropriate structure is needed.SOLUTION: A protective circuit is formed using a non-linear device 105a including a gate insulating layer 102 covering gate electrodes 101, first oxide-semiconductor layers 103 overlapping with the gate electrodes 101 over the gate insulating layer 102, and a pair of first and second wiring layers 38 and 39 whose end portions overlap with the gate electrodes over the first oxide-semiconductor layers 103 and in which a conductive layer 104a and a second oxide-semiconductor layer 170a are stacked. When a junction of oxide-semiconductor layers having different physical properties is formed over the gate insulating layer 102, stable operation can be performed as compared to a Schottky junction, junction leakage can be reduced, and characteristics of a non-linear device 170a can be improved.SELECTED DRAWING: Figure 5

There is provided a method for resetting an arbitrary state, hosted in a quantum system, to the vacuum Fock state or a coherent state, wherein the quantum system comprises: (I) at least one resonant portion configured to have a first mode having a first resonant frequency and wherein the arbitrary state is hosted in the first mode, (II) a non-linear element coupled to the at least one resonant portion so as to non-linearly couple to the first mode, and (III) one or more signal generator(s) coupled to the at least one resonant portion and / or to the non-linear element and configured to input control signals to physically stabilize a cat qubit subspace in the first mode having a cat phase angle. The method comprises: (i) physically stabilizing for a first period of time, with the one or more signal generator(s), a first cat qubit subspace having a first cat phase angle and first cat size ΙαΙ2, wherein α is a first amplitude which is the amplitude of the superposed coherent states Ι ± α > defining the first cat qubit subspace (702); (ii) after the first period of time, physically performing for a second period of time, with the one or more signal generator(s), a first parallel displacement drive by inputting electromagnetic radiation having a first phase substantially equal with the first cat phase angle, a frequency substantially equal to the first resonant frequency, and a first displacement amplitude greater than or equal to the first amplitude (704); (iii) after the second period of time, physically stabilizing for a third period of time, with the one or more signal generator(s), a second cat qubit subspace having a second cat phase angle which is substantially equal to the first cat phase angle and second cat size ΙβΙ2, wherein β is a second amplitude which is the amplitude of the superposed coherent states Ι ± β > defining the first cat qubit subspace, such that a coherent state Ιβ> with the second amplitude β is stabilized in the first mode (706). There is also provided a corresponding quantum processor, a computer program product, and a computer-readable medium.