30results about How to "Increase inhibition" patented technology

The present invention discloses a wave filter circuit which comprises a filtering capacitor or filtering inductor, and a resonance inductor which is connected with the filtering capacitor in series to form a LC series circuit, or a resonance capacitor which is connected with the filtering inductor in parallel to form a LC parallel circuit. The control of the filtering capacitor/inductor to a single frequency point signal is reinforced through the LC series/parallel connection. The invention also discloses a switch power source which adopts the wave filter circuit. The switch power source comprises a capacitor or an inductor which can process the transmitting interference. At least one in the capacitors is in-series connected with a resonance inductor to form a LC series circuit. Or at least one in the inductors is in-parallel connected with a resonance capacitor to form a LC parallel circuit. The control of the capacitor/inductor to transmitting interference on a single frequency point is reinforced through the LC series/parallel resonance. The wave filterer circuit of the invention has an advantage of simple structure and can effectively process the stronger signal interference on a single frequency point.

The invention provides a method for eliminating odor emitting by the water and bottom sludge in a river. The method is characterized in that: ferric oxide and sodium humate complex preparation is added into river water with the dosage of 10-30g per cubic meter. The weight percentage ratio of the ferric oxide and the sodium humate complex preparation is 50-70 percent of ferric oxide and 30-50 percent of sodium humate. The method of the invention can obviously inhibit water and bottom sludge in a river emitting odor, so as to avoid disturbing people.

The invention relates to a lithium-sulfur battery functional composite diaphragm and a preparation method therefor, and belongs to the technical field of a battery material. The lithium-sulfur batteryfunctional composite diaphragm comprises a diaphragm substrate and a functional coating layer which coats the diaphragm substrate; the functional coating layer is a mixture of nitrogen-cobalt-doped graphitized carbon material and a binder; the functional coating layer is 5-15[mu]m in thickness; the preparation method comprises the steps of performing calcining on the obtained BMZIF material in inert atmosphere at a temperature of 900-1,000 DEG C for 3-5h to obtain the nitrogen-cobalt-doped graphitized carbon material; performing uniform mixing on the nitrogen-cobalt-doped graphitized carbon material and the binder to obtain the functional coating layer; and the coating the diaphragm substrate with the functional coating layer and then performing drying to obtain the lithium-sulfur batteryfunctional composite diaphragm. By virtue of the lithium-sulfur battery diaphragm, the positive electrode impedance of the lithium-sulfur battery can be lowered, and the shuttle effect of the polysulfide ions can be suppressed effectively.

The invention provides a fractional-N frequency synthesizer, which can effectively inhibit integer-N boundary spurs. A reference signal frequency division output unit, a VCO (voltage controlled oscillator) frequency division output unit, a Delta-Sigma modulator and a phase discriminator are integrated on an integrated circuit, so that the interference of external noises can be effectively reduced. An LVDS (low voltage differential signaling) wire input into the integrated circuit from a reference clock unit and an LVDS wire output from the integrated circuit by the phase discriminator form a 90-degree layout, and an LVDS wire output from the integrated circuit by the phase discriminator and an LVDS wire input into the integrated circuit from a VCO form a 90-degree layout, so that the probability of intermodulation between higher harmonics of a reference clock and the output frequency of the VCO can be maximally reduced, and the inhibition degree of the integer-N boundary spurs furthercan be decreased. Moreover, a reference clock signal and an output signal of the VCO are transmitted by adopting the LVDS wires, so that the amplitude of the transmitted signals is low, and even though the two signals are intermodulated, the power of intermodulation interference is low and almost can be neglected.

The embodiment of the invention discloses a magnetic resonance image processing method and device, a storage medium and a magnetic resonance imaging system. The method comprises the steps of obtainingto-be-corrected data, inputting the to-be-corrected data into an artifact correction model, and generating initial correction data, wherein the artifact correction model is obtained through pre-training based on a neural network model, and a k space corresponding to the initial correction data comprises more high-frequency components than the k space corresponding to the to-be-corrected data; performing weighting processing on the to-be-corrected data and the initial correction data to generate weighting results, and performing fusion processing on the two weighting results to generate targetcorrection k space data; and reconstructing the target correction k space data to generate an artifact-corrected target correction magnetic resonance image. Through the technical scheme, the magneticresonance image with a better artifact correction effect is obtained under the condition that the resolution and the signal-to-noise ratio of the artifact-corrected magnetic resonance image are basically unchanged and the scanning time is not increased.

The invention provides an impedance bootstrapping frequency conversion band-pass filter. The impedance bootstrapping frequency conversion band-pass filter at least comprises an LCR network and a frequency conversion band-pass filter body. The LCR network is used for connection to achieve matching of narrow-band input impedance and rising conversion of input source impedance to obtain in-band gain. The frequency conversion band-pass filter body is used for providing high-quality-factor band-pass impedance matched with the input impedance and cooperating with the input source impedance to achieve enhancement of out-of-band rejection. According to the impedance bootstrapping frequency conversion band-pass filter, the front LCR network is used for assisting in achieving matching of front-end impedance of a radio frequency receiver, converting and bootstrapping the input source impedance with a low resistance value into impedance with a high resistance value, and cooperating with the switch capacitor type frequency conversion band-pass filter body to promote voltage gain in a passing band and enhance the out-of-band interference rejection performance. The impedance bootstrapping frequency conversion band-pass filter is compatible with parasitic capacitors and bond-wire inductors of radio frequency input nodes.

The invention provides a 3D integrated superminiature band-pass filter which is realized by adopting a semi-lumped structure, and comprises an input/output port, four parallel-connection resonant cells, an inter-stage coupling capacitor and a Z-shaped crossed coupling capacitor. According to the band-pass filter provided by the invention, interconnection between stages is realized by virtue of electromagnetic coupling among the resonant cells. By virtue of an LTCC (low temperature co-fired ceramic) laminating structure, an equivalent lumped parameter element is realized. Compared with the prior art, the 3D integrated subminiature band-pass filter has the advantages of a small size, low cost, good frequency-selection characteristic, high temperature stability and small insertion loss, can be machined into a paster film, is convenient to integrate with other microwave assemblies and beneficial to mass production. The scheme adopted by the invention can be used for inhibiting out-of-band harmonic waves, and is applicable to occasions and corresponding systems with strict requirements on size, electrical performance, temperature stability and reliability, such as communication terminals of corresponding microwave millimeter wave frequency bands, digital radars and wireless communication hand-held terminals.

The invention discloses a setting calculation method for closing and opening delays for suppressing the excitation inrush current of a converter transformer, comprising: testing the opening and closing times of a circuit breaker; determining the target closing angle of the circuit breaker; and calculating the delayed closing angle; Calculate the circuit breaker opening target angle and other steps. The invention can close each phase of the converter transformer at the optimal angle, so that the generated excitation inrush current is the least, and open the switch at the optimal angle, so that the generated converter transformer has the least residual magnetism, and the excitation inrush current can be reduced again during the next charging.

The invention provides ground cloth for inhibiting the growth of weeds in an orchard and an application method of the ground cloth. The ground cloth comprises a rectangular ground cloth body; the ground cloth body comprises a woven fabric layer and a non-woven fabric layer from top to bottom; the woven fabric layer is a net-shaped object formed by vertically and horizontally interweaving a plurality of braided wires; and long-strip-shaped pressing strips are arranged along the two sides of a long side of the ground cloth body. According to the ground cloth for inhibiting the growth of the weeds in the orchard, the woven fabric layer and the non-woven fabric layer, which are separated, are adopted, so that the air permeability is good, the inhibition of the weeds is improved and rotting of tree roots is prevented. The pressing strips and the like are arranged on the ground cloth body, so that the ground cloth body is convenient to fix, the working amount of utilization is reduced, the utilization time is long and the practicability is strong; and the growth of the weeds in the orchard can be effectively controlled, and the ground cloth is convenient to splice and use. According to the application method of the ground cloth for inhibiting the growth of the weeds in the orchard, the overgrowth of the weeds around fruit trees can be inhibited and the weeds can also be sufficiently recycled, so that the weeds form a fertilizer of the fruit trees and the values of the weeds are utilized at the maximum.

The present invention relates to a capacitive distance sensor. The capacitive distance sensor comprises a measurement polar plate of a capacitor to be measured, a reference capacitor Cref, a switch S3, a switch S4, a charging/discharging circuit of the capacitor to be measured, a charging/discharging circuit of the reference capacitor, a fully differential sampling/holding circuit and a source follower. A capacitor to be measured Cf is formed on the surface of the measurement polar plate of the capacitor to be measured and the surface of a measured conductor; the measurement polar plate of thecapacitor to be measured is connected with the charging/discharging circuit of the capacitor to be measured through the switch S3, and is connected with the source follower; one end of the referencecapacitor Cref is connected with the charging/discharging circuit of the reference capacitor through the switch S4, and is connected with the source follower; the other end of the reference capacitorCref is connected with a system ground Vss; the input end of the fully differential sampling/holding circuit is connected with the voltage output end of the source follower; and two input ends of thesource follower are respectively connected with the capacitor to be measured Cf and the reference capacitor Cref. The capacitive distance sensor is not sensitive to the parasitic effect, and is high in anti-noise capability and high in measurement precision.

The invention relates to an oxygen-deficient titanium dioxide nanosheet modified lithium ion battery diaphragm and a preparation method and application thereof. The method comprises the following steps of 1) calcining titanium dioxide nanosheets at high temperature under flowing hydrogen to obtain oxygen-deficient titanium dioxide nanosheets, 2) dispersing the oxygen-deficient titanium dioxide nanosheet obtained in the step 1) into a solvent, and standing after ultrasonic treatment, 3) loading oxygen-deficient titanium dioxide on the lithium ion battery diaphragm through vacuum filtration of the suspension obtained in the step 2), and drying to obtain the functionalized diaphragm modified by the oxygen-deficient titanium dioxide nanosheet. The method has the beneficial effects that the adsorption capacity of the transition metal oxide to polysulfide is inherited, and charged polysulfide is very easy to capture, so that the capacity of inhibiting the dissolution of polysulfide is greatly improved. Besides, the introduction of oxygen deficiency can improve the conductivity and catalytic ability of TiO2, the conversion of long-chain polysulfide adsorbed on the surface of TiO2 into short-chain polysulfide is promoted, and the utilization rate of active substances is improved.

The invention discloses a distributed power supply modulation amplifier with a filtering function, belongs to the field of wireless communication, and particularly relates to a distributed power supply modulation amplifier. A digital filter is successfully embedded into the power supply modulation amplifier by utilizing the gain characteristic of the power supply modulation amplifier. On the basisof meeting high efficiency, the suppression degree of a near-carrier end and a sideband is increased, and the filter and the power amplifier are integrated together, so that the system is simplified,the cost is reduced, the volume density of the whole transmitter system is improved, and the transmitter is very suitable for the design of an integrated circuit. Such a structure also has reconfigurability.

The embodiment of the invention discloses a distance ambiguity suppression method and device based on a particle swarm algorithm and an optimal beam forming method, electronic equipment and a storage medium. The method comprises the following steps: acquiring a key parameter value corresponding to each particle sample in a sample group; according to a preset radar signal parameter value and the key parameter value corresponding to each particle sample, determining a receiving directional diagram of the corresponding particle sample by applying an optimal beam forming method; according to the receiving directional diagram of each particle sample, determining the fitness of the corresponding particle sample; sorting the particle samples according to the fitness of each particle sample, and determining the optimal particle sample of the iteration; and under the condition that the fitness of the optimal particle sample of the current iteration does not meet the specific condition, updating the sample group and performing a new round of iteration according to the fitness of the optimal particle sample of the current iteration, and repeating the iteration until the fitness of the optimal particle sample meets the specific condition.

The invention relates to the technical field of polymerization inhibitors, and particularly discloses a nanometer rare earth composite polymerization inhibitor as well as a preparation method and application thereof. The nanometer rare earth composite polymerization inhibitor comprises the following components in parts by weight: 30-450 parts of N,N-dimethylformamide, 50-150 parts of 4-hydroxy-2,2,6,6-tetramethylpiperidine nitroxide free radicals, 10-60 parts of an antioxidant, 20-50 parts of calcium dodecyl benzene sulfonate, 10-50 parts of nanometer rare earth oxide-nanometer rare earth derivative, and 400-800 parts of a JM-1 fuel oil synergist, wherein the nanometer rare earth oxide-nanometer rare earth derivative is formed by mixing a nanometer rare earth oxide and a nanometer rare earth derivative. The preparation method comprises the following steps: mixing N,N-dimethylformamide and other raw materials to obtain a mixture, adding the JM-1 fuel synergist, and conducting mixing. The nanometer rare earth composite polymerization inhibitor provided by the invention can relieve coking and scaling on the pore surface of a catalyst and prolong the long-period normal operation of a device.

The invention belongs to the field of integrated circuits, and discloses a heartbeat current signal conversion device. The heartbeat current signal conversion device comprises a converter, a mixer and a fully-differential integrator, and is characterized in that the converter is used for converting modulated light signals into current signals and transmitting out the current signals; the mixer is used for performing frequency conversion on heartbeat current signals and background light current signals in the current signals and then transmitting out the modulated light current signals, the frequency converted heartbeat current signals and the frequency converted background light current signals in the current signals; and the fully-differential integrator is used for performing positive integration and negative integration on the inputted modulated light current signals, the frequency converted heartbeat current signals and the frequency converted background light current signals and then outputting voltage signals. The fully-differential integrator provided by the embodiment of the invention can improve suppression of the heartbeat current signal conversion device for common-mode noise, the linearity and the output dynamic range. In addition, a loop of the heartbeat current signal conversion device always forms a closed loop, thereby being capable of directly outputting for a lower-level circuit, saving an output buffering circuit, and thus reducing the power consumption.

The invention provides a current sensor system. The system comprises: a first current sensor, which includes a first current-carrying conductor and a first magnetic sensor located around the first current-carrying conductor; a second current sensor, which comprises a second current-carrying conductor and a second magnetic sensor located around the second current-carrying conductor; wherein one endof the first current-carrying conductor is electrically connected to one end of the second current-carrying conductor, and a measured current flows through the first current-carrying conductor and the second current-carrying conductor in sequence. Compared with the prior art, in the current sensor system, an external magnetic field in a non-sensitive axis direction enables the output or sensitivity of the first current sensor to be increased or decreased, and the external magnetic field in the non-sensitive axis direction enables the output or sensitivity of the second current sensor to be decreased or increased, so that the external magnetic field suppression can be improved, and then the current detection precision is further improved.

Starting from clinics, it is found through repeated study at the animal level that by inhibiting differentiation of MDSCs, plumbagin can inhibit the inhibiting effect of MDSCs on effector T cells, promote the infiltration of anti-tumor immune cell sub-populations in a tumor micro-environment and inhibit recruitment of immunity inhibitive cells MDSCs towards tumor tissue to achieve the anti-pancreatic-cancer effect. Plumbagin can directly act on MDSCs or indirectly inhibit differentiation and functions of MDSCs by inhibiting expression of CCL2, IL-6 and other relevant inflammatory cytokines. These results show that plumbagin may be a new drug for treating pancreatic cancers; meanwhile, a new scientific basis is provided for immunological therapy of the pancreatic cancers.

The present disclosure provides engineered immune cells and methods for their creation and use. The immune cells comprise activating and blocking receptors, which form into micro-clusters upon contacting a target or non-target cell.

The present disclosure provides engineered immune cells and methods for their creation and use. The immune cells comprise activating and blocking receptors, in which the blocking receptor provides a signal that dominates a signal from the activating receptor.

The present disclosure provides engineered immune cells and methods for their creation and use. The immune cells comprise activating and blocking receptors, and binding of the blocking receptors to cognate ligands causes reduced surface expression of the activating receptors.

An embodiment of the invention provides a low-pass filter, belonging to the technical field of filters. The low-pass filter comprises a shell, a cover plate and coaxial connectors, wherein a partitionplate is arranged in the shell, and the interior of the shell is divided into a plurality of cavities by the partition plate; the cover plate covers the plurality of cavities; the coaxial connectorsare arranged at the two ends of the shell respectively; a strip line copper sheet is suspended in the shell and comprises a low-pass section used for suppressing harmonic waves and a plurality of copper sheet branches connected to the low-pass section and arranged at intervals, the two ends of the low-pass section are connected with the coaxial connectors at the two ends of the shell respectively,and the multiple copper sheet branches are correspondingly arranged in the multiple cavities respectively; and a coupling structure is arranged on the partition plate and comprises an insulating supporting body and a capacitor copper sheet fixed to the insulating supporting body, and the two ends of the capacitor copper sheet are located in the two cavities in the two sides respectively. According to the invention, the filter is small in size, low in frequency, wide in pass band, low in loss, high in power, free of debugging and capable of meeting the technical requirement for transmission zero points.

The invention discloses a multi-task fusion speech enhancement model training method. The method comprises the following steps: acquiring an echo signal source, clean speech and real noise; and obtaining reverberation voice and noisy signals. And obtaining a training label of the to-be-trained neural network. And training to obtain a speech enhancement model. According to the embodiment of the invention, the nonlinear distortion characteristics introduced by a neural network learning hardware system can improve the suppression degree of residual nonlinear echoes. And better reverberation removal and noise reduction effects can be obtained by utilizing the advantages that the neural network is superior to the traditional linear prediction and noise estimation algorithm. Multiple speech enhancement tasks can be completed by a single model, algorithm integration is simple and efficient, and maintenance cost is low.