21results about How to "Improve interference effect" patented technology

The invention provides a strip-shaped long-distance unmanned aerial vehicle sensing countering system and method along a railway, and relates to the technical field of rail traffic safety. The system comprises an unmanned aerial vehicle detection device arranged at a key node along a railway and used for detecting an unmanned aerial vehicle; the unmanned aerial vehicle countering device transmits a controllable interference signal to interfere with the unmanned aerial vehicle; the signal receiving and directional transmitting equipment is used for receiving, amplifying and redirectionally transmitting the interference signal or the radio signal transmitted by the unmanned aerial vehicle; the rear-end intelligent management and control platform is used for receiving the signal information, analyzing the threat level in real time, selecting a countering strategy and implementing directional interference through equipment; the method comprises the steps of equipment deployment, detection and early warning, data analysis, instruction issuing, signal emission and interference, and response and dynamic adjustment. According to the invention, the problems of insufficient coverage, poor identification precision and single countering means in long-distance and strip-shaped scenes along the railway in the prior art can be solved, and real-time sensing and dynamic countering of the unmanned aerial vehicle are realized.

The invention discloses airborne radar interference equipment of a phased array system in the technical field of radar countermeasure. The airborne radar interference equipment comprises an antenna array; a plurality of transmit-receive assemblies comprising a plurality of transmit-receive channels, wherein each transmit-receive channel comprises a numerical control attenuator and a numerical control phase shifter; the beam control unit controls the numerical control phase shifter and the numerical control attenuator; the power divider / combiner is used for combining or dividing the signals; the circulator is used for realizing one-way transmission of signals; the low-noise amplifier is used for performing low-noise amplification on the signal; the microwave frequency conversion unit is used for performing down-conversion and up-conversion processing on the signal; the digital processing unit is used for processing the intermediate frequency signal to form an interference signal; and the main control unit communicates with the digital processing unit to control an interference pattern, and communicates with the beam control unit to control beam pointing, frequency, attenuation and an enable signal of a transmit-receive assembly. The airborne radar interference equipment can realize interference signals with high power and beam scanning, and has the advantages of high equivalent radiation power and rapid interference scanning.

The invention relates to a specific chemiluminescent probe for determining CYP3A in the technical field of medicines, which is structurally characterized by being shown in the following formula: # imgabs0 #. The probe structurally comprises a high-specificity reaction response group of CYP3A, a chemiluminescent group, a self-hyperchromic group and a self-leaving linking group connected with the high-specificity reaction response group, the chemiluminescent group and the self-hyperchromic group, the chemiluminescent probe does not need to be excited by an external light source, is free of phototoxicity, has extremely high signal-to-noise ratio and sensitivity, can be used for cell and living body imaging, has the advantages of being free of interference of biological matrixes, different in detection mode and the like compared with a traditional fluorescent probe, guarantees the accuracy of experiments, has the characteristics of detection convenience and high-throughput detection, and is suitable for large-scale popularization and application. The potential application value is realized in new drug research and development and individualized drug treatment.

The invention relates to the technical field of unmanned aerial vehicle detection countering, and discloses a mooring type unmanned aerial vehicle detection countering system based on power line carrier control, and the countering system is composed of a radio interference module, a drive-by-wire unmanned aerial vehicle control module, a four-direction mooring positioning module, a system integration control module and a performance optimization module. The radio interference module is composed of a high-power radio transmitter, a frequency selector, a signal analyzer and an interference mode switcher, interference signals are accurately controlled and adjusted through the multi-component design, it is ensured that all key links including control, navigation and video transmission links are covered, the interference mode switcher is switched among different interference modes, and the interference mode switcher is switched among different interference modes. The unmanned aerial vehicle is controlled in a wired mode, the influence of radio interference on the unmanned aerial vehicle is avoided, the stability and reliability of the unmanned aerial vehicle in a radio interference environment are ensured by the wired control mode, and the beneficial effects of effectively sending countering signals to the ground, minimizing a shielding blind area and maximizing countering efficiency are achieved.

The invention discloses a low-slow small aircraft target reconnaissance and interference integrated device, and the device comprises a plurality of receiving and transmitting antennas which are used for obtaining a collection signal, and transmitting an interference signal after the signal amplification; the high-power switches are connected with the transceiving antennas in a one-to-one correspondence manner and are used for switching received and transmitted signals; the microwave transceiving unit is connected with the high-power switch and is used for acquiring the acquired signal and filtering the acquired signal; the signal processing unit is connected with the microwave transceiving unit and is used for processing the filtered acquisition signal to obtain a target signal and a trigger interference signal and transmitting the target signal and the trigger interference signal to the microwave transceiving unit; and the microwave power amplifier is connected with the microwave transceiving unit and the high-power switch and is used for amplifying the interference signal. Through the scheme, the device has the advantages of simple structure, high sensitivity, accuracy, reliability and the like, and has very high practical value and popularization value in the technical field of reconnaissance interference.

The application provides a synthetic aperture radar active composite jamming method and system, the method comprising: acquiring intermediate frequency radar signals to be jammed, radar related parameters and control parameters; calling DSP and multiple FPGA calculation boards to calculate modulation coefficients corresponding to each false scattering point according to pre-downloaded deception templates and radar related parameters; generating deception jamming signals corresponding to the intermediate frequency radar signals according to the intermediate frequency radar signals and the modulation coefficients corresponding to each false scattering point; generating suppression jamming signals corresponding to the intermediate frequency radar signals according to the control parameters; and determining composite jamming signals corresponding to the intermediate frequency radar signals according to the deception jamming signals and the suppression jamming signals corresponding to the intermediate frequency radar signals. The application can obtain composite jamming signals, has better jamming effect, is not easy to expose the position of the jammer, and has lower cost of the jammer. The signal processing architecture of DSP and FPGA is adopted, the calculation performance of the system is improved, and the real-time performance of system simulation is ensured.

The invention discloses a coherent comb spectrum suppression interference method, and relates to the field of electronic countermeasures. The method comprises the following steps: receiving a radar signal, and converting the radar signal into a digital IQ signal; a plurality of coherent suppression interference modules are used for carrying out parallel modulation processing on the digital IQ signals in a digital domain, each module independently carries out modulation, and I-path signals and Q-path signals output by all the modules are added to generate coherent comb spectrum suppression interference signals, the modulation processing comprises the following steps: performing Doppler frequency modulation on the signal after amplitude modulation; performing Doppler noise modulation on the signal after Doppler frequency modulation; the modulated signal is converted into an analog signal, and the analog signal is radiated to a radar after up-conversion and amplification; wherein the coherent comb spectrum suppression interference signal is used for suppressing a real target signal at a radar receiving end. The method has the advantages of high coherence, quick response and adaptive adjustment, real target signals can be effectively submerged, and the interference effect is improved.

According to the preparation method of the high-spinning monatomic cobalt monolithic catalyst provided by the invention, monatomic sites are constructed on a millimeter-scale porous macroscopic carrier by adopting a green solvent'one-pot method ', so that the advantages of high monatomic reaction activity and high practicability and stability of the macroscopic carrier can be integrated; meanwhile, stable and ordered monatomic sites are formed through induction of a confinement effect generated by a nano pore channel in the carrier, and selective oxidation of non-free radical species dominated by the monatomic sites is enhanced through an adsorption enrichment-confinement catalysis effect to remove water pollutants; the strong carrier-metal interaction is regulated and controlled, so that the monatomic activity and the catalytic stability are improved, and the secondary pollution problem caused by metal dissolution is reduced. The preparation process is simple, convenient, green and economical, the confinement type active metal coordination environment and the non-free radical selective oxidation path are easy to regulate and control, and the application prospect in the aspect of selective oxidation removal of various pollutants under the complex water quality condition is good.

The invention provides a mobile signal shielding method. The mobile signal shielding method comprises the following steps: generating a corresponding pseudo-synchronization signal by acquiring emission information of a real base station, and then converting the pseudo-synchronization signal into a waveform signal; and transmitting an interference signal formed by superposing different waveform signals according to different communication systems so as to interfere with a synchronization signal of a real base station. The invention further provides a system, equipment and an electronic device of the mobile signal shielding method. According to the system and the method provided by the invention, error interference on uplink signals and service signals is avoided through accurate positioning, so that unnecessary spectrum interference is reduced, and normal communication is ensured. According to the method, high efficiency and high precision of interference are achieved, the system can suppress real synchronous signals, the interference effect is maximized, and it is ensured that the system still has excellent interference performance in a complex multi-path propagation environment. The interference-free frequency point and the interference-free signal are not interfered, the power consumption is saved by 80%, the ideal interference effect of 100% is achieved with the emission energy of 5%, and the low-power-consumption and high-efficiency interference is realized. And meanwhile, the limitation of multipath interference is exceeded, and an echo-like cancellation algorithm is introduced, so that a pseudo-synchronization signal effectively covers and interferes with a synchronization signal of a real base station, and terminal equipment is effectively prevented from staying in a network.

The invention discloses a deception jamming method and device for an azimuth phase coding SAR (synthetic aperture radar), and belongs to the technical field of electronic support system synthetic aperture radar countermeasure. The method comprises the following steps: intercepting an SAR signal, carrying out two-dimensional structured phase stripping by constructing an inverse distance modulation operator and an inverse azimuth modulation operator, and estimating to obtain an azimuth phase sequence; carrying out complex domain differential operation on the estimated azimuth phase sequence, constructing a phase consistency measurement index and minimum consistency order mapping, and identifying a coding structure of the phase consistency measurement index and the minimum consistency order mapping; constructing a linear least square problem based on an identification result, and reconstructing an azimuth phase sequence; and performing phase consistent modulation including convolution modulation on the intercepted signal to generate a deception jamming signal. According to the method, complete matching of the interference signal and the SAR receiving filter is realized, and effective deception interference can be implemented on a new system SAR adopting random, primary, secondary and grouped phase coding.

The invention discloses a post-turbidity prevention and control method for green plum fruit wine. The method comprises the step of adding polysaccharide or compound polysaccharide or a combination of the polysaccharide and the compound polysaccharide and bentonite into the green plum fruit wine for post-turbidity prevention and control of the fruit wine. Research finds that compared with carboxymethyl cellulose, guar gum and solek, Arabic gum, sodium alginate and glucan have obvious interference effects on four protein-polyphenol models when polysaccharide or compound polysaccharide or a combination of the polysaccharide and the compound polysaccharide and bentonite are added into the green plum fruit wine, the Arabic gum, the sodium alginate and the glucan have obvious interference effects on the four protein-polyphenol models, and by combining the Arabic gum, the sodium alginate and the glucan, the green plum fruit wine has the obvious interference effects on the four protein-polyphenol models. The interference effect is better than that of single polysaccharide. The polysaccharide or the compound polysaccharide is combined with the common bentonite for use, and the bentonite TOP + Arabic gum and the bentonite TOP + Arabic gum + sodium alginate have a better clarification effect compared with single bentonite TOP. Therefore, the polysaccharide or the compound polysaccharide or the combination of the polysaccharide and the bentonite is applied to turbidity prevention and control of the green plum fruit wine.

The invention relates to the technical field of gas sensors, in particular to an anti-ion interference gas sensor packaging structure and a working method thereof, and the anti-ion interference gas sensor packaging structure is characterized in that a first electrode leading-out end is arranged at the lower part of a substrate; the upper cover is made of a conductive material, the upper cover is fixedly arranged at the upper part of the substrate, a cavity is formed between the substrate and the upper cover, the upper cover is provided with a plurality of hole channels which are communicated with gas in the cavity, and the upper cover is used for being connected with an external circuit so as to apply voltage on the upper cover; and the gas sensitive element is arranged in the cavity and is electrically connected with the first electrode leading-out end. The gas sensitive element has the beneficial effects that voltage is applied to the upper cover, the voltage causes charge distribution on the surface of the conductive upper cover and forms an electric field, and ions are prevented from entering the cavity from a hole channel in the upper cover through an attraction capture or repulsion blocking effect of the electric field, so that an ion isolation structure is formed, and the ions are prevented from interfering with detection of the gas sensitive element; the detection precision is improved.

The invention discloses a post-turbidity prevention and control method for kiwi fruit wine. The method comprises the step of adding polysaccharide or compound polysaccharide and alkaline protease or bentonite into the kiwi fruit wine for post-turbidity prevention and control of the fruit wine. The invention finds that the polysaccharide CMC, the trehalose and the glucan have a better interference effect on a model constructed by the turbid protein and the polyphenol of the kiwi fruit wine, and the compound polysaccharide CMC-trehalose compound polysaccharide has the highest turbid protein decline rate. According to the method, polysaccharide or compound polysaccharide is combined with bentonite or alkaline protease, a synergistic effect is found between the polysaccharide or compound polysaccharide and bentonite or alkaline protease, turbid protein in the kiwi fruit wine can be better removed, and the method can be used for preventing and controlling post-turbidity of the kiwi fruit wine.

The invention discloses application of RGS14 in preparation of a kit for auxiliary diagnosis or prognosis of liver cancer and application of an RGS14 expression inhibitor in preparation of a medicine for treating liver cancer. It is found for the first time that RGS14 expression in liver cancer is remarkably improved compared with para-carcinoma tissue, and high RGS14 expression is not beneficial to overall survival of liver cancer patients; and when the RGS14 is knocked down, the clone formation and migration of the liver cancer cells are obviously inhibited. The high expression of the RGS14 is closely related to the poor prognosis of the liver cancer patient, which prompts that the RGS14 can be used as a prognosis marker of the liver cancer, and effective information is provided for prognosis evaluation and curative effect monitoring of the liver cancer. The invention also provides an RGS14 expression inhibitor siRNA which has a good interference effect when being used for inhibiting the expression of RGS14 and has clinical application potential.

The invention relates to a non-uniform intermittent sampling interference method, device and equipment based on RFSoC. The method comprises the following steps: acquiring the sub-pulse width of an intercepted intra-pulse frequency coding radar signal; obtaining a target interference parameter according to a constraint formula and the sub-pulse width; sampling, forwarding and modulating according to the target interference parameter to obtain a non-uniform intermittent sampling and forwarding interference signal; and after the non-uniform intermittent sampling and forwarding interference signal is subjected to RFSoC interpolation frequency mixing processing, the radar is interfered. According to the technical scheme, an RFSoC device is adopted, the interference method is low in power consumption and good in real-time performance, non-uniform intermittent sampling and forwarding interference is achieved by restraining interference parameters and adopting a low-complexity and high-real-time mode, the complexity of the method is reduced, meanwhile, the interference efficiency and stability of the non-uniform intermittent sampling and forwarding interference are improved, and the interference performance of the non-uniform intermittent sampling and forwarding interference is improved. And the interference effect is good.

The invention provides a radar interference waveform adaptive generation method, device and equipment. The method comprises the following steps: setting a radar signal generation function based on configuration parameters about a radar in an opposite side radar; constructing a jammer model for reinforcement learning; in response to a received radar signal of an adversarial party, controlling to generate a matched radar environment based on the generation function, and using the jammer model to control the jammer to output a jamming wave corresponding to a jamming pattern; evaluating the interference effect of the interference wave, and calculating and determining a reward value corresponding to the interference effect; and adjusting parameters of the jammer model based on the interference effect and the corresponding reward value, so that the adjusted jammer model can generate interference waves corresponding to a new interference pattern. According to the method, the optimized interference waveform can be adaptively generated according to the change of the radar environment of the opposite side, and the radar interference effect is improved.

The present invention discloses a siRNA targeting the HDAC3 gene of cotton bollworm, the nucleotide sequence of the sense chain is shown in SEQ ID NO.13, and the nucleotide sequence of the antisense chain is shown in SEQ ID NO.14. Also disclosed is the application of the aforementioned siRNA in the regulation of cotton bollworm growth, development or metamorphosis, the application in inhibiting the expression of the HDAC3 gene of cotton bollworm, or the application in preventing and controlling cotton bollworm, or the application in preparing cotton bollworm insecticide. Compared with dsRNAs, selecting siRNA to silence the target gene of cotton bollworm is a more accurate and effective method. The present invention finds one of the five siRNAs with outstanding silencing efficiency on the HDAC3 gene, and has a significant inhibitory effect on the pupation, eclosion, egg laying and hatching of cotton bollworm, and has an outstanding interference effect. It is expected to be applied to the prevention and control of cotton bollworm in the field, and has a good application prospect.

The invention relates to application of an inhibitor in regulation and control of proliferation, invasion and migration of endometrial cancer cells. According to the application of the inhibitor in regulating and controlling proliferation, invasion and migration of endometrial cancer cells, the inhibitor contains a substance for reducing the expression level of circ0005692 and / or SDC3, and the application does not include disease treatment and diagnosis. The application comprises application of circ0005692 and / or SDC3 as a target in regulation and control of proliferation, invasion and migration of endometrial cancer cells. The inhibitor provided by the invention contains a substance for reducing the expression level of circ0005692 and / or SDC3, and can regulate and control proliferation, invasion and migration of endometrial cancer cells in a targeted manner. The molecular mechanism that the inhibitor regulates and controls the progress of the endometrial cancer through a circ0005692 / miR-650 / SDC3 axis is clarified, an action target is provided, and a research basis is provided for expanded research of the endometrial cancer.

The application discloses a kind of multi-jammer cooperative resource allocation method and equipment for networking radar, the method includes: determining multi-jammer cooperative jamming networking radar scene;Scene contains opposite radar, our target and our jammer;Obtain the position and speed of each opposite radar, our target and our jammer at current time;According to position and speed, determine the measurement value of each opposite radar to each our target at current time;According to measurement value, calculate the bayesian information matrix of each our target at current time;Based on the resource constraint of our jammer and the bayesian information matrix of each our target at current time, construct multi-jammer cooperative resource allocation model;Using augmented lagrange multiplier method, solve multi-jammer cooperative resource allocation model, obtain the solution result that the interference residence time of each our jammer to each opposite radar at current time is characterized.The application can quickly allocate the resource of our jammer, and the calculation complexity is low.

The present invention discloses a cross-eye interference system and interference generation method based on digital amplitude and phase control. Two signal processing boards are used to measure the frequency of the radio frequency signals of the two transceiver paths; according to the obtained frequency, the coarse calibration phase value and amplitude value and the fine calibration phase value and amplitude value of the corresponding two paths are searched in the pre-stored coarse calibration table and fine calibration table; according to the coarse calibration phase value and amplitude value, attenuators and phase shifters are used to roughly adjust the phase and amplitude of the two paths at the radio frequency end; according to the fine calibration phase value and amplitude value, two signal processing boards are used to fine-tune the phase and amplitude of the two paths after the coarse adjustment. The present invention adopts a reverse cross-eye system, and the radio frequency signals of the two transceiver paths are roughly adjusted in amplitude and phase at the radio frequency end, and then fine-tuned in the baseband signal, to achieve the effect of approximately equal amplitude and opposite phase, high amplitude and phase control accuracy, and good interference effect.

The invention relates to a multi-beam interference resource allocation method based on an improved artificial fish swarm algorithm, which comprises the following steps of: firstly, constructing a hardware interference resource model of a multi-beam jammer, and analyzing interference hardware resources required by different interference styles so as to obtain required hardware resource types; designing a solution model and constraint conditions of resource allocation according to threat level differences and interference effect differences of different interference patterns on different radars, and constructing an optimization target and a constraint function of an interference resource allocation model, thereby obtaining a multi-beam interference resource allocation model; the interference resource allocation model is solved by adopting an artificial fish swarm algorithm, and the artificial fish swarm algorithm is optimized by adopting a linearly reduced step length, mutation operation and initialization of an infeasible solution; in a word, the method has the advantages that the constructed hardware interference resource simulation effect is good, the algorithm is easy to implement, the sensitivity to an initial value is low, the earlier-stage optimization speed is high, and the global search capability is high.