9results about How to "Suppress mutual interference" patented technology

The invention discloses a programmable metasurface unit chip and a programmable metasurface, and the unit chip sequentially comprises a first dielectric layer, a first bonding dielectric layer, a controllable metal layer, a second bonding dielectric layer, a third dielectric layer, a third metal layer, a third bonding dielectric layer, a fourth dielectric layer and a fourth metal layer from top to bottom. The controllable metal layer comprises a metal structure and a controllable element and is used for forming two isolation electromagnetic wave regulation and control channels so as to independently control orthogonal polarization electromagnetic waves and provide independent and controllable electromagnetic response for the incident orthogonal polarization electromagnetic waves; the third metal layer is used as a radio frequency ground for improving the electromagnetic wave reflection performance; the fourth metal layer is used for inputting bias voltage; and bias voltage is loaded to the controllable element through the metal holes of each layer. The plurality of unit chips are arranged on the substrate in an array mode to form the metasurface. The unit chip provided by the invention can greatly reduce the design and implementation complexity of the metasurface, reduce the production and maintenance cost, and promote the application of the metasurface in a wireless information system.

The invention provides a double-channel planar gate silicon carbide LDMOS and a preparation method thereof. The preparation method comprises the following steps: forming a barrier layer on a silicon carbide substrate, and performing etching and ion implantation to form a first channel region and a first N-type source region; a barrier layer is formed again, etching and ion implantation are carried out, and an isolation region is formed; a barrier layer is formed again, etching and ion implantation are carried out, and a second channel region is formed; a barrier layer is formed again, etching and ion implantation are carried out, and a P-type well region is formed; a barrier layer is formed again, etching and ion implantation are carried out, and a second N-type source region is formed; forming a barrier layer again, etching and depositing metal, and forming a body diode metal layer; a barrier layer is formed again, and a gate dielectric layer is formed through etching and deposition; forming a barrier layer again, etching and depositing metal, and forming a gate metal layer; re-forming a barrier layer, etching, depositing metal, respectively forming a source metal layer and a drain metal layer, and removing the barrier layer to complete preparation; and a double-channel structure design is adopted, so that the on-resistance of the device is reduced.

This invention discloses a method for locating the sub-pixel intersection point of two straight lines based on robust estimation and local refinement, comprising the following steps: S10, defining the Region of Interest (ROI) and extracting sub-pixel edges at multiple scales; S20, initial fitting of the straight lines based on robust estimation; S30, refining the intersection region and assessing uncertainty. This invention achieves intersection point location accuracy superior to the pixel level; significantly reduces the impact of abnormal edge points, missing local edges, and interference near the intersection point on the location results; has a high degree of automation, reducing reliance on manual parameter adjustments; and can output the intersection point coordinates while providing an estimate of its location uncertainty, providing a decision-making basis for downstream applications.

A mixer circuit disclosed by the present invention comprises a diode mixer and a triode mixer, a first intermediate frequency signal pair output by the diode mixer is input to the triode mixer, and the triode mixer comprises a first triode mixer and a second triode mixer which are electrically connected. The triode mixer comprises a radio frequency input stage for amplifying an input signal, wherein a first intermediate frequency signal pair output by a first intermediate frequency port is input to the radio frequency input stage; the local oscillation frequency conversion stage is used for processing the first intermediate frequency signal pair input into the triode mixer into a second intermediate frequency signal pair by using a second local oscillation signal pair; the output load stage is used for converting the second intermediate frequency signal pair into a voltage signal and outputting the voltage signal, the linearity and noise performance of the whole mixer circuit can be improved, the mixer circuit is suitable for processing application scenes with high requirements for signal quality, the working frequency range of the whole mixing system is expanded, and the service life of the mixer circuit is prolonged. And the signal intensity and the dynamic range of the whole frequency mixing system are improved.

A stator core, a birotor motor and a clothes dryer, the stator core comprises a plurality of outer stator wire slots and a plurality of inner stator wire slots, the outer stator wire slots and the inner stator wire slots are formed by separating a plurality of tooth parts uniformly distributed on yoke parts, and the extension directions of the tooth parts on the two yoke parts are opposite. The plurality of inner stator wire slots are used for accommodating stator windings to form an inner magnetic field, the plurality of outer stator wire slots are used for accommodating stator windings to form an outer magnetic field, and at least one yoke part is provided with a magnetic resistance structure used for inhibiting mutual interference between the inner magnetic field and the outer magnetic field. According to the utility model, on the premise of ensuring the output stability and efficiency of the double-rotor motor, the distance between the outer stator wire duct and the inner stator wire duct can be reduced, so that the outer diameter of the stator core is reduced, the size of the stator is reduced, and the size of the double-rotor motor is smaller; therefore, the double-rotor motor is suitable for a clothes dryer and other scenes with high volume requirements, and the equipment compactness is improved.

The application discloses a kind of vehicle-mounted millimeter wave radar interference suppression methods based on sparse and low rank model, comprising: the low rank and sparse characteristics of useful signal and interference signal in radar receiver demodulation filtered intermediate frequency signal are utilized, and low rank sparse optimization model is constructed;After maximum minimum non-convex sparse penalty and low rank factor decomposition are carried out to the low rank sparse optimization model, interference signal and useful signal are separated by the aid of alternating direction multiplier method and iterative optimization is realized.Thereby, explicit detection of interference component is avoided, and compared with prior art, the power loss of target signal will be greatly reduced.

The application belongs to the technical field of water treatment agents, and particularly relates to a multifunctional composite water purifying agent and a preparation method thereof, which comprises the following raw materials in parts by weight: multifunctional water purifying powder 90-100 parts, bentonite 8-10 parts, sodium carboxymethyl cellulose 0.5-1.5 parts, sodium percarbonate 0.5-1 part and sodium citrate 0.5-1 part; the multifunctional water purifying powder comprises core layer material and shell layer slurry; the multifunctional water purifying agent of the application takes the multifunctional water purifying powder with a core-shell structure as a core, cooperates with bentonite, sodium carboxymethyl cellulose, sodium percarbonate and sodium citrate, realizes efficient and synchronous removal of heavy metals, organic matters, colority and microorganisms, and has the advantages of wide spectrum, stability and easy recovery.

The application discloses a kind of three-channel wireless power and information synchronous transmission device based on multi-resonance frequency point and parameter design method, it relates to a kind of three-channel wireless power and information synchronous transmission device and parameter design method.The present application is to solve the problem that the transmission rate is limited in the existing wireless power and information synchronous transmission system due to the narrow channel bandwidth, and it is difficult to implement high-speed modulation scheme.The present application uses high-order resonant circuit to construct multiple independent information transmission channels, enabling three-channel information parallel high-speed transmission under a single coupling coil structure, breaking through the inherent narrow bandwidth of energy transmission channel to limit high-capacity data transmission;Through the design of circuit resonance point frequency difference, the system can effectively suppress the mutual interference between different channels without additional filter.The present application belongs to the technical field of wireless power transmission.

The invention relates to an active infrared vision fusion VR positioning method in an under-illumination environment, and the method comprises the steps: configuring an active infrared illumination unit on a head-mounted device, controlling the active infrared illumination unit to emit infrared light to the environment in a preset illumination mode, and collecting an infrared image; synchronously acquiring measurement data of the inertial measurement unit; performing preprocessing and feature extraction and tracking on the infrared image to obtain visual features; carrying out pre-integration on the measurement data to obtain IMU pre-integration data; visual features and IMU pre-integration data are fused, and state estimation and map construction are carried out through a multi-sensor tight coupling optimization algorithm; outputting a six-degree-of-freedom pose; and based on a state estimation result or visual feature extraction quality, dynamically adjusting illumination parameters, and repeating the steps. The fundamental problem that a traditional visual scheme fails in the dark is thoroughly solved, stable and continuous six-degree-of-freedom pose output is achieved, meanwhile, the optimal balance of power consumption and performance is achieved, mutual interference among multiple devices is effectively restrained, and the precision and robustness of the system are greatly improved.