10 results about "Strong pulse" patented technology

The application discloses an in-loop enhancement method for super-low code rate video coding based on artificial intelligence, and relates to the technical field of artificial intelligence, which comprises the following steps: step 1: obtaining a reconstructed frame generated by a current decoder as a visual input and a current code rate indicator as a control input; generating an initial pulse event stream containing event timestamps and polarity and a pulse timing consistency graph thereof; step 2: under the constraint of the pulse timing consistency graph, performing pulse consistency re-estimation and asynchronous residual back-annotation based on interleaved phase cross-checking; step 3: under the control of in-loop closed-loop and code rate collaborative regulation, generating a pulse reconstruction enhancement frame by using the enhanced pulse event stream, and replacing a reference frame with the pulse reconstruction enhancement frame. The application can significantly reduce the cross-frame distortion accumulation risk, improve the subjective viewing quality and the reliability of the reference frame, and has practical application value in low-bandwidth transmission and limited storage scenarios.

This invention discloses an electromagnetic ultrasonic online monitoring probe, device, and method for steam pipelines with a coating layer. The probe includes: a butterfly coil for supplying a DC-like current, or simultaneously supplying a DC-like excitation current and a strong pulse excitation current; and a zigzag coil for supplying a strong pulse excitation current. The zigzag coils are unequally spaced, with the spacing gradually decreasing from the input end to the output end. Supplying a DC-like excitation current into the butterfly coil generates a bias magnetic field; supplying a strong pulse excitation current into the butterfly coil excites ultrasonic body waves, while supplying a strong pulse excitation current into the zigzag coil excites ultrasonic guided waves, thereby enabling pipeline wall thickness and defect detection. The guided waves excited by the unequally spaced zigzag coils exhibit Chirp signal characteristics, allowing for pulse compression to improve the signal-to-noise ratio and resolution of the ultrasonic echo signal. The probe is small in size, unaffected by Curie temperature, and suitable for continuous high-temperature detection and detection in narrow areas.

The application provides a time delay-Doppler joint estimation method under polar pulse noise interference. On the basis of the orthogonal matching pursuit algorithm, the maximum correlation entropy criterion and the l1 norm constraint are introduced to enhance the robustness under the pulse noise, and a fast solving algorithm based on a distributed iterative optimization strategy is used to improve the calculation efficiency. Compared with the existing same type estimation method, the method has a wider application range, higher estimation accuracy and stronger robustness.

The invention relates to the field of decoking, in particular to a thermal power plant external peeping type flame detection sleeve air flow pulse decoking device which comprises a spray head piece, a plurality of power assisting holes, a plurality of air flow pulse decoking devices and a plurality of air flow pulse decoking devices. The sensing assembly is located in the spray head part; the adjusting assembly is movably arranged on the outer side of the spray head part; when the sensing assembly moves in the first direction, the adjusting assembly is driven to movably change the medium flow of the assistance hole. The coke cleaning device has the beneficial effects that through linkage of the sensing assembly and the adjusting assembly in the coke cleaning device, the resistance change in the coke cleaning process is automatically sensed, and the forward thrust is correspondingly adjusted. When encountering stubborn coke blocks, the device can automatically pressurize and break obstacles, and can automatically depressurize and stably move when passing through a smooth area, so that the self-adaptive control of the coke cleaning process is realized; by instantly maximizing the flow of the power-assisted hole and generating strong pulse-type thrust, coke blocks can be effectively crushed, cleaning of difficult areas can be completed without manual intervention, and the success rate of coke cleaning is remarkably improved.

The invention discloses an ultra-low bit rate video coding and decoding in-loop enhancement method based on artificial intelligence, and relates to the technical field of artificial intelligence, and the method comprises the steps: 1, obtaining a reconstruction frame generated by a current decoder as a visual input, and obtaining a current bit rate indication quantity as a control input; generating an initial pulse event stream containing an event timestamp and polarity and a pulse time sequence consistency graph of the initial pulse event stream; 2, under the constraint of the pulse time sequence consistency graph, pulse consistency reestimation and asynchronous residual error reinjection based on staggered phase rechecking are executed; and step 3, under the control of in-loop closed loop and code rate cooperative adjustment, generating a pulse reconstruction enhanced frame by using the enhanced pulse event stream, and replacing a reference frame with the pulse reconstruction enhanced frame. According to the method, the cross-frame distortion accumulation risk can be remarkably reduced, the subjective watching quality and the reliability of the reference frame are improved, and the method has the practical application value in low-bandwidth transmission and limited storage scenes.

This invention discloses an experimental apparatus and method for enhancing oil recovery through high-frequency pulsed CO2 injection, relating to the field of oil and gas extraction technology. The apparatus includes a high-frequency pulsed injection module, a pulse waveform adjustment module, and a nuclear magnetic resonance (NMR) module. The high-frequency pulsed injection module comprises a first pneumatic valve, a second pneumatic valve, and a pneumatic valve controller. The first pneumatic valve is connected to a high-pressure CO2 source, and the second pneumatic valve is connected to a low-pressure CO2 source. The pneumatic valve controller controls the first and second pneumatic valves to interlock and instantaneously switch according to pulse parameters, generating high-frequency pressure pulses. The pulse waveform adjustment module adjusts the waveform of the high-frequency pressure pulses. The NMR module, based on the adjusted high-frequency pressure pulses, alternately injects high-pressure and low-pressure CO2 into the experimental core, collects NMR data of the experimental core before and after pulsed injection, and generates an adjustment signal to adjust the pulse parameters. This invention can achieve instantaneous pressure changes and enhance the pulse effect.

This invention relates to the field of mud pulse generator technology and discloses a mud pulse generator structure, including a suspension section, a fixed block, a main shaft, a rotor, and a stator. The rotor blades transition in a circular wedge shape from top to bottom. The mud pulse generator structure also includes a pressure spring, a clamping ring, and multiple Venturi flow channels. The pressure spring is placed in a slide rail within the suspension section, with its upper end abutting against the lower end face of the stator. The clamping ring is fixed within the suspension section, with its upper end face abutting against the lower end of the pressure spring. Multiple Venturi flow channels are placed in the flow grooves of the fixed block. From top to bottom, each Venturi flow channel includes an inlet straight section, a contraction section, an expansion section, and an outlet straight section. A negative pressure channel is connected to one side of the throat between the contraction and expansion sections. Multiple jet holes are formed around the periphery of the outlet straight section. This invention enhances the pulse signal amplitude without disrupting the regularity of the pulse signal changes, while ensuring the normal operation of the overall structure.

The utility model discloses a quantum radar detection system based on quantum correlation. The quantum radar detection system comprises a signal generation module, a beam splitter a, a signal transmission module, a beam splitter b, an imaging device, an interference module, a detector and a master control module. The utility model discloses a quantum radar detection system based on quantum correlation, which is characterized in that a signal generation module outputs adjacent continuous pulses with good quantum correlation, when two continuous strong pulses enter an interference module, the two continuous strong pulses are completely coherent and cancelled, and a detector does not have a count value; external operation (such as interception and retransmission) can destroy quantum correlation, so that the interference module cannot output completely coherent and cancelled optical signals, and then the detector is triggered to generate a great count value; therefore, whether the detection signal of the quantum radar is interfered can be judged through the counting result of the detector, the judgment mode is simple and convenient, the error rate is greatly reduced, and the method is widely applied to the unmanned system and navigation field.

The application discloses a cross-patient seizure detection method based on a graph-enhanced pulse state space model, first, the brain electrical signal data of a patient is acquired and an electrode space topology graph is constructed; then, a pulse state space model is used to extract the time sequence features of physiological channels, and a pulse graph convolution network is used to perform message aggregation between adjacent nodes in a discrete pulse domain across time steps; finally, feature aggregation is performed through a global average pooling operation at a graph level, and a two-class prediction probability is output through a fully connected classifier. The application follows the design logic of "first time and then space", the pulse state space model models the potential brain state dynamics of the time sequence change, and realizes stable long context feature processing through the cyclic updating mode of the adaptive hardware; the pulse graph neural network completes the information transmission and fusion between channels based on the electrode correlation graph, can capture the spatial dependence relationship which is crucial for the representation of seizures, reduces the calculation energy consumption, and improves the overall performance.

The invention discloses a quadrupole nuclear two-dimensional high-resolution solid NMR method based on five-quantum excitation enhancement, and the method comprises the steps: carrying out the optimization of a frequency offset satellite transition selective flip pulse based on a first change hill climbing algorithm, obtaining an LP-opt pulse, designing an LP-opt 5QMAS pulse sequence, and carrying out the time sequence of the LP-opt 5QMAS pulse sequence, the method sequentially comprises a layout number transfer enhancement pulse, a first center transition selective excitation pulse, a first LP-opt pulse, a second LP-opt pulse, a second center transition selective excitation pulse and a third center transition selective excitation pulse. According to the invention, high-order quantum transition effective excitation which is difficult to excite by a traditional rectangular pulse method is realized. Especially for a nuclear spin system with a large nuclear quadrupole interaction constant (CQ) generated due to asymmetry of a local structure, the five-quantum excitation material shows excellent five-quantum excitation efficiency in a 5QMAS experiment.