119 results about "Pulse duration" patented technology

The invention relates to the technical field of welding, in particular to a hot riveting welding head synchronous temperature control method and system based on the temperature change rate, and the method comprises the steps: executing full-power heating pulse triggering operation on a welding head, calculating the pulse duration according to a start timestamp and an end timestamp, calculating the temperature rise, and eliminating peak noise through a digital filtering algorithm; environment temperature and relative humidity are collected in real time, and equivalent heat capacity is calculated; the initial temperature difference between any welding heads is calculated, and a dynamic target temperature curve is constructed; and calculating an actual temperature change rate, synchronously extracting a target change rate of the dynamic target curve at a corresponding moment, calculating a change rate deviation between the two change rates, judging whether intervention adjustment is needed or not, calculating an output signal by using an incremental PID algorithm if intervention adjustment is needed, and adjusting the heating power according to the output signal. According to the scheme, the stability of the hot riveting welding quality is effectively improved by accurately quantifying the thermal characteristics of the heterogeneous welding head, dynamically planning a personalized temperature rising track and performing high-frequency closed-loop regulation and control.

According to the mask defect in-situ repairing method, the femtosecond laser is adopted for defect repairing, and all the advantages of the femtosecond laser are absorbed. Femtosecond laser is ultrashort pulse laser with'femtosecond 'as a time unit, the pulse duration time of the femtosecond laser is extremely short (femtosecond magnitude), and the peak power of the femtosecond laser is extremely high (the maximum can reach pat watt). Therefore, according to the repairing method, the repairing precision can be reduced to 15 nm, the heat affected zone is smaller than 1 micron, the repairing time can be shortened to 100 ms for the defect of 100 nm, the roughness of the repaired surface is smaller than or equal to 0.5 nm, meanwhile, the good effects of high repairing precision, low heat affected zone, high repairing speed, low equipment cost and simple operation are achieved, and the rejection rate of the mask is reduced. The method is especially suitable for repairing advanced process masks, such as EUV and ArF, and display panel masks, such as OLED and FMM, and MEMS device masks.

An audio authentication and identity verification system and method that encodes dynamic cryptographic information across the audible and inaudible spectrum (0 Hz→30 kHz, scalable to 124 kHz). A rolling acoustic signature simultaneously embeds identity, time, date, and GPS location using a hybrid of frequency shift keying (FSK), phase shift keying (PSK), Morse style pulse duration modulation, and time domain multiplexing. To guarantee post-event privacy and integrity, the system further incorporates a dual custody audio architecture in which every authenticated recording is split into complementary bit interleaved segments stored separately, and the decryption key is fragmented via Shamir 3-of-5 secret sharing—preventing unilateral access or tampering. The system establishes a tamper proof, real time, and offline capable authentication layer that functions in air, through conventional microphones, and via dedicated emitter hardware.

In accordance with an embodiment, a method for controlling a constant on-time switched mode power converter includes: generating a pulse signal having an on-time; during a soft-start phase of the power converter, successively increasing the on-time from an initial duration to a final duration, wherein the final duration is larger than the initial duration; sensing an output voltage of the power converter and generating a feedback signal proportional to the output voltage; adjusting a frequency of the pulse signal based on the feedback signal and a reference signal; and driving a power switch with the pulse signal to control the power switch and regulate the output voltage.

The application provides a method for regulating halogen perovskite microstructure at a frozen temperature by using a laser and an electric field, and relates to a device, which is a customized TEM in-situ sample rod equipped with a laser optical fiber and a liquid nitrogen Dewar bottle, and a Nd:YAG pulse laser system with a wavelength of 532 nm, adjustable pulse frequency and a pulse duration of 7 ns coupled into a transmission electron microscope through the optical fiber; first, at a frozen temperature, perovskite nanocrystals are etched by controlling the energy, frequency and action time of the pulse laser, then at the frozen temperature, the small crystal nucleus rotation of the perovskite nanocrystals is controlled by using a low-energy pulse laser and applying an electric field, and the perovskite nanocrystals are recrystallized along specific crystal faces, so that perovskite nanocrystals with specific exposed surfaces, reduced microstructure defects and increased radiation resistance are obtained, and the method has great value for large-scale industrial production.

A method and apparatus for inscribing a high-temperature stable Bragg grating in an optical waveguide, comprising the steps of: providing the optical waveguide; providing electromagnetic radiation from an ultrashort pulse duration laser, wherein the wavelength of the electromagnetic radiation has a characteristic wavelength in the wavelength range from 150 nanometers (nm) to 2.0 micrometers (μm); providing cylindrical focusing optics; providing a diffractive optical element that when exposed to the focused ultrashort laser pulse, creates an interference pattern on the optical waveguide, wherein the irradiation step comprises irradiating a surface of the diffractive optical element with the focused electromagnetic radiation, the electromagnetic radiation incident on the optical waveguide, from the diffractive optical element, being sufficiently intensive to cause permanent (Type II) change in the index of refraction within multiple Bragg grating planes in the core of the optical waveguide resulting from at least one micropore.

We present a ground-based laser system for searching, ranging, and tracking that actively illuminates small resident space objects (RSOs) in low Earth orbit (LEO) and observes position and transit-time of reflections, enabling orbital custody of most one-to-few centimeter-sized objects. A diode-pumped alkali laser (DPAL) augmented with mode-locking and Q-switching serves as an illuminator and offers exceptionally high spectral brightness due to its output beam's sub-nanosecond pulse duration and picometer-level spectral linewidth. Kilohertz fast-rastering enables interrogations of distinct few-meter-sized sky-patches at megahertz rates. Paired on the observation side with one or more telescopes outfitted with Faraday anomalous dispersion optical filters (FADOFs), image intensifiers, multi-pixel arrays, and nanosecond timing, the combined system could offer nearly background-free discoveries of RSOs every hour, even during daytime. Periodically re-flashing previously discovered objects to maintain orbit custody expends only a small fraction of total observing time.

The invention provides a display device and an image brightness modulation method thereof. In the display device, a clock signal generator is used for generating a plurality of original clock signals in a display frame. The display frame has a valid frame and a plurality of skip frames. Each of the original clock pulse signals has a first pulse duration in a valid frame and a plurality of skip frames, respectively. The pulse width modulator is used for receiving a plurality of original clock pulse signals and setting a plurality of pulse width compensation values respectively corresponding to each original clock pulse signal in a plurality of skip frames. The pulse width modulator modulates each original clock signal from a first pulse duration to a second pulse duration in a plurality of pulse durations in a plurality of skip frames according to a plurality of pulse width compensation values.

This invention relates to a keyboard system and a method of operating the keyboard. The keyboard system includes: a key structure comprising a key switch having a light-emitting element and a phototransistor; and one or more processors driving the light-emitting element for a first pulse duration. The output of the phototransistor is determined when the first pulse duration ends, wherein if the output is lower than a first output value when the first pulse duration ends, it is determined that the key structure is pressed, and if the output of the phototransistor is higher than a second output value when the first pulse duration ends, it is determined that the key structure is not pressed. The fall time of the output during the first pulse duration is determined, and if the fall time is less than the first pulse duration, the first pulse duration is calibrated to a second pulse duration, the second pulse duration being greater than the fall time and less than the first pulse duration.

This invention discloses a method and system for resisting slice reconstruction interference based on alternating frequency modulation slope polarity and time-series agility. It mainly addresses the problems of high complexity, poor real-time performance, and high dependence on prior information and training data in existing technologies. The scheme is as follows: At the transmitting end, a joint agile transmission signal is established based on the number of sub-pulses, sub-pulse duration, sub-pulse interval, sub-pulse bandwidth, and sub-pulse frequency modulation slope; at the receiving end, the received signal is segmented according to the recorded sub-pulse timing to obtain each segment signal, and pulse compression and delay compensation for both matched and mismatched channels are performed simultaneously; dynamic weights are generated based on the energy of the two compensated channels; an anomaly suppression factor is constructed based on the energy of the matched channels of each segment, and the output of each segment's matched channels is weighted and accumulated using this factor and the dynamic weights to obtain a one-dimensional range profile result. This invention does not require a large amount of training data or estimation of interference parameters, has low computational complexity, can suppress false targets generated by slice reconstruction interference while maintaining the energy of the real target, and can be used for target detection.

The invention relates to a method and a device for determining a phase difference (6) between a measurement signal (4) and a reference signal (5), at least comprising: converting the measurement signal (4) into a first square-wave signal (33) and the reference signal (5) into a second square-wave signal (35), which are each substantially symmetrical square-wave signals (33, 35), the pulse duration of which corresponds to half a period duration; determining the phase difference (6) by means of a phase comparison of the two square-wave signals (33, 35), wherein, by means of a logic module (36, 63), a pulse-duration-modulated signal is generated, from which the phase difference (6) is extracted. The invention also relates to an optical arrangement (200) for determining a phase difference (6) between a first optical signal (1) and a second optical signal (2).

A device includes a grouping of N qubits, where N is equal to two or more, and a coherent light source configured to, given selected values for a set of parameters of at least a first and a second laser pulse, the parameters selected from a relative phase shift, a laser frequency, a laser intensity, and a pulse duration: apply at least the first and second laser pulses to all qubits within the grouping of N qubits, thereby coupling a non-interacting quantum state |1 to an interacting excited state |r, such that each qubit that begins in quantum state |1 returns to the state |1 upon completion of the at least first and second laser pulses, and such that qubits in the grouping are mutually blockaded.

The present disclosure relates to an inertial sensor for measuring an amount of inertia along a sensing axis. The sensor includes an atom interferometer including a pulse generator for generating one or more pulsed light beams defined by respective pulse durations to place atoms in superposition and recombine the atoms to measure interference of the atoms, the one or more pulsed light beams being configured to generate one or more pulsed light beams, the one or more pulsed light beams being defined by respective pulse durations, the one or more pulsed light beams being defined by respective pulse durations, and the one or more pulsed light beams being defined by respective pulse durations, the one or more pulsed light beams being defined by respective pulse durations. And calculating the amount of inertia based on the measured interference. The sensor further includes an auxiliary acceleration sensor configured to measure acceleration transverse to one or more of the pulsed light beams; and a control system configured to calculate a lateral offset of the atoms relative to the pulsed light beam caused by the measured acceleration transverse to the one or more of the light beams, increase the pulse duration, and adjusting the pulse timing to compensate for a reduced beam strength applied to the atoms due to the lateral offset.

Techniques are described for acquiring data of an examination object and imaging parameters for an acquisition of measured data via an acquisition method in which gradients to be switched for position encoding of the measured data have their full strength during an irradiation of the RF excitation pulses, and a desired flip angle are loaded. The feasibility of the correction, the acquisition method is selectively performed with the loaded imaging parameters and the loaded flip angle. If a feasibility check is negative, a pulse duration of the RF excitation pulses to be irradiated in the acquisition method and / or of the desired flip angle are adjusted into an adjusted flip angle and / or at least one of the desired imaging parameters into an adjusted imaging parameter, and the acquisition method is performed with an adjusted pulse duration and / or with an adjusted flip angle and / or with an adjusted imaging parameter.

This invention relates to an artificial intelligence storage system. A string comprises multiple sets of transistor pairs connected in parallel between a source line and a bit line, with each set containing a pair of source-interconnected storage transistors. The sources of both storage transistors in each set are connected to the source line, and the drains of both storage transistors are connected to the bit line. Multiple strings are mapped to multiple weight value carriers of a neural network. The input data for each set of transistor pairs in each string is refreshed periodically. In consecutively numbered sets of transistor pairs, if the difference between the effective pulse duration of any storage transistor in the previous cycle and the effective pulse duration in the next cycle exceeds a predetermined value, then the adjacent numbered transistor pairs of that set are locked for one refresh cycle during the periodic refresh of the input data, and unlocked after the locking ends to begin the next round of input data refresh.

An x-ray FLASH radiotherapy device uses an electron beam to generate x-rays on a target element. The focal area on the target element is about 1 to about 12 cm2. The target element is separated from a radiotherapy patient by a thin aerogel insulator. Using about 50 to 200 kV of power, the x-ray FLASH radiotherapy device administers 40 Gy / s of radiation or more during short bursts or pulses of one second or less. Due to the short duration of these pulses, heating of the target element is limited, thereby reducing the source to surface distance between the radiation source and the patient.

The invention relates to a discharge control circuit, a corresponding system, a vehicle and a method. A discharge control circuit includes a driving circuit arrangement that applies a pulsed discharge signal to a control terminal of an electronic switch and generates a pulse in the pulsed discharge signal, the duration of the pulse being in accordance with a voltage applied to the control terminal of the electronic switch sensed at a sensing node. The circuit also includes a feedback network including a reference generator that generates a signal indicative of a reference duration of a pulse in the pulsed discharge signal, and a pulse duration generator coupled to the sensing node to generate a duration signal indicative of an actual duration of the pulse in the discharge signal. A pulse duration comparator coupled to the reference generator and the pulse duration generator acts on the pulse duration control circuitry to control the duration of a pulse in the pulse discharge signal applied to the control terminal of the electronic switch.

In summary, the present disclosure provides an approach which combines active DC-electrostimulation with active AC measurements, all performed using a disposable wound dressing device 1. The DC-electrostimulation and the AC-measurements can be automatically performed by a circuitry 10 of as system 23 comprising said device 1, and the circuitry 10 can adapt the stimulation, in particular parameters such as DC current strength, DC pulse duration, or waiting time m1 based on the active AC measurements. For achieving biocompatibility and long-term stability, the device 1 features laser-induced graphene (LIG) stimulation electrodes 3a, 3b which are covered with a conductive polymer 15. All electrodes 3a, 3b, 5, 6 as well as electrical contact pads 19 and wirings 16 can be defined in a single laser processing step (c.f. Figure 7).

The application relates to the technical field of radio frequency signal processing, in particular to a radio frequency absorption rate determination method, device and computer readable storage medium. The method comprises the following steps: collecting instantaneous radio frequency output power in a single radio frequency pulse duration at a set time interval; calculating an equivalent pulse width of the single radio frequency pulse according to all the collected instantaneous radio frequency output powers; calculating pulse output energy of the single radio frequency pulse according to the equivalent pulse width; and calculating the radio frequency absorption rate of the radio frequency in a target time length according to the pulse output energy of the single radio frequency pulse. The method collects the instantaneous radio frequency output power of a single radio frequency pulse, determines the equivalent pulse width of the single radio frequency pulse, calculates the radio frequency absorption rate based on the equivalent pulse width, improves the accuracy of the radio frequency absorption rate calculation, and thus more effectively prevents the target, especially the target subjected to magnetic resonance detection, from being damaged due to excessive heat.

The present application relates to a method (100) for use in cutting a substrate or preparing a substrate for cleaving. The method (100) comprises: irradiating (102) the substrate with a plurality of pulses of a laser beam, the pulses having a pulse duration of less than a nanosecond and an elongate cross sectional spatial profile, and wherein the fluence of the plurality of pulses is controlled to be less than a single shot damage threshold fluence of the substrate; providing (104) relative movement between the laser beam and the substrate such that the plurality of pulses are arranged along a cutting path; and controlling (106) the relative movement such that each of the pulses is spatially overlapped with at least one other of the pulses along the cutting path. An apparatus having a laser system configured to perform the method (100) is also disclosed.

The invention discloses a screw machine control system, and relates to the technical field of screw machine control, and the system comprises a detection module which is used for capturing the rising edge of an external electromagnetic pulse signal as a time reference point, and establishing a control time sequence synchronous with the electromagnetic pulse signal, and the control time sequence comprises a pulse duration and a pulse intermittent period; the processing module is used for locking the output torque of the screw machine and collecting the magnetic field intensity change rate of the electromagnetic pulse signal within the pulse duration of the current round of control time sequence; in the pulse intermittent period of the current-round control time sequence, reading an upper-round torque value output by the screw machine for screwing the memory screw last time, and measuring the springback value of the memory screw in the process from the output of the upper-round torque value to the end of the current-round pulse continuous period from the screw machine; determining a target torque value according to the upper wheel torque value, the springback value and the magnetic field intensity change rate; and controlling the screw machine to output the target torque value. The memory screw assembling cost of the screw machine under the strong magnetic working condition is reduced, and the good assembling effect is achieved.

The present disclosure relates to reducing reflection of transparent solids using laser, coatings and devices employing transparent solids. Methods and apparatus for reducing reflections of a transparent solid in a spectrum using a laser, coatings and apparatuses using a transparent solid are disclosed. The laser is used to shape the surface of the transparent solid material by raising the temperature of the material near the melting temperature, thereby creating a desired target nanostructured two-dimensional anti-reflective pattern array on the surface. A laser energy density value, wavelength, repetition rate, pulse duration, and number of consecutive laser pulses per focal spot are selected and a desired focal spot distribution on the surface of the transparent solid material is determined. Transparent solid materials are relatively translated to generate a desired array of nanostructured two-dimensional patterns.

A method for surface treating a functional surface of a cooking apparatus for cooking food to be cooked. The method according to the invention can include: structuring the functional surface via a laser-processing apparatus, the functional surface being structured by at least one laser beam, the at least one laser beam comprising at least temporary pulse durations of at most 500 ns, and the structuring producing a profile having at least one indentation, applying a lubricant to the structured functional surface, thermally treating the structured functional surface having the lubricant at a temperature between 50° C. and 700° C. in order to obtain the treated functional surface. The cooking apparatus according to the invention has a functional surface treated in accordance with the method according to the invention.

The present disclosure provides a method for forming a conductive structure. The method comprises: i) applying a conductive ink composition on a substrate; and ii) performing an IR laser irradiation on the applied conductive ink composition. The IR laser irradiation is performed with a wavelength of 800 nm to 1150 nm and a pulse duration of 100 femtoseconds to 5000 femtoseconds, and is operated at an absolute value of defocused Z offset ranging from 2 mm to 40 mm.

A cochlear implant system with a measurement unit is disclosed, the cochlear implant system comprising: an external unit configured to receive an acoustic sound and to process the acoustic sound into an encoded audio signal; an implantable unit configured to receive the encoded audio signal; a pulse generation unit configured to generate a first electrical pulse of a first pulse duration and a second electrical pulse of a second pulse duration different from the first pulse duration based on the encoded audio signal; an electrode array comprising a plurality of electrodes, wherein at least one of the plurality of electrodes is configured to receive at least the first electrical pulse and the second electrical pulse; a capacitor connected to at least one of the plurality of electrodes; a measurement unit configured to measure a first electrical voltage based on the first electrical pulse and a second electrical voltage based on the second electrical pulse across the connection of the at least one of the plurality of electrodes and the capacitor; and an evaluation unit configured to calculate a voltage difference between the measured first and second electrical voltages.

The present disclosure provides a method for forming a conductive structure. The method comprises: i) applying a conductive ink composition on a substrate; and ii) performing IR laser irradiation on the applied conductive ink composition. The IR laser irradiation is performed at a wavelength of 800 nm to 1150 nm and a pulse duration of 100 femtoseconds to 5000 femtoseconds, and is operated with a defocus Z offset in an absolute value in a range of 2 mm to 40 mm.

The present disclosure provides a conductive ink composition for forming a wiring pattern by a one-step IR laser irradiation process. The conductive ink composition comprises: silver nanoparticles, a binder and a solvent, and the one-step IR laser irradiation process is performed with a wavelength ranging from 800 nm to 1150 nm and a pulse duration of 100 femtoseconds to 1000 femtoseconds. The present disclosure also provides a wiring pattern manufactured from the conductive ink composition by the one-step IR laser irradiation process.

A selective deposition method is disclosed. The selective deposition method comprises providing a plurality of substrates in a process chamber, the plurality of substrates having a first surface comprising a first material and a second surface comprising a second material, the first surface being different than the second surface, and selectively forming a layer comprising a metal on the first surface relative to the second surface, wherein selectively forming the layer comprises: i) contacting the plurality of substrates with a precursor comprising a compound of the form MXnOm, wherein: M is a metal; X is selected from the group consisting of F, Cl, Br, and I; n and m are integers; n+2m is at least 4 to at most 6; and ii) contacting the plurality of substrates with a reactant, wherein step i) comprises pulsing the precursor for a pulse duration of greater than 10 seconds.

A device (100) for determining temperature information (130) from a sensor device (200) configured to transmit sensor information by temporally limited electrical pulses (210) according to a defined protocol, the device comprising a data processing unit (110) configured to: call reference data (120) on a correlation between a pulse duration (215) of the electrical pulses (210) and a thermal effect in the sensor device (200); measure a pulse duration (215) of at least one of the electrical pulses (210); and determine the temperature information (130) based on the measured at least one result and the reference data (120).

The invention provides a near-fault seismic motion vector type intensity index construction method, and belongs to the technical field of structural toughness anti-seismic analysis, and the method comprises the steps: calculating a value of an ideal speed pulse signal acceleration response spectrum at a structural basic period under a 5% damping ratio, and taking the value as a near-fault seismic motion speed pulse spectrum characteristic representation parameter; calculating the normalized total speed pulse duration, and representing the influence of the multi-speed pulse generation time process on the low-cycle fatigue damage of the structure; the two parameters are combined into a vector, namely the near-fault multi-speed pulse record vector type intensity index. According to the method, the structure dynamic response is directly associated with the velocity pulse frequency spectrum characteristic, meanwhile, the pulse generation time process parameters are introduced for the first time, the structure fatigue damage is associated with the velocity pulse generation process in the seismic oscillation, the near-fault multi-velocity pulse seismic oscillation intensity can be effectively represented, and the accuracy of the seismic oscillation intensity is improved. And the influence on the seismic response of the structure can be measured more accurately.