389 results about "Incident wave" patented technology

The invention provides an RCS prediction method based on deep learning, computer equipment and a readable storage medium. The method comprises the following steps: firstly, constructing an electromagnetic simulation model of a target, and resolving to obtain noise-free RCS sample data corresponding to different incident wave angles; and then simulation errors are introduced to form noise sample data. Then, constructing a convolutional auto-encoder network as an RCS denoising model, and training the RCS denoising model by using noise-containing and noise-free sample data; and then a deep neural network model is built based on a grey wolf algorithm to serve as an RCS prediction model, the trained denoising model is used for preprocessing the training data set, then the prediction model is trained, and finally prediction of a target RCS value is achieved. According to the method, the GWO-DNN deep learning model is constructed for prediction, so that the dependence on a physical mechanism and the manual parameter adjustment cost are reduced. Meanwhile, noise reduction preprocessing is carried out on the actually measured RCS result through CDAE, the too high influence of measurement errors on the prediction result is overcome, and the RCS prediction precision is improved.

The invention provides a spatial light modulator, a self-checking device thereof and a light computing device, and relates to the technical field of optical modulation.The spatial light modulator comprises an incident waveguide structure, a covering plate, a liquid crystal layer, a substrate and an emergent waveguide structure; the incident waveguide structure is optically coupled with the cover plate and is used for guiding externally incident laser into the cover plate at a preset angle; the covering plate is used for enabling laser to be propagated in the covering plate in a total reflection form; the substrate bears the liquid crystal layer, integrates the driving circuit and is used for applying regulation and control voltage to the liquid crystal layer; the liquid crystal layer is arranged on the lower side of the covering plate and used for conducting phase modulation on the laser transmitted to the liquid crystal layer in a total reflection mode in response to the regulation voltage. And the emergent waveguide structure is optically coupled with the covering plate and is used for guiding the laser modulated by the liquid crystal layer out of the covering plate to a free space. According to the spatial light modulator, efficient spatial modulation and accurate control of the light field are realized, so that the integration and function accuracy of the spatial light modulator in self-inspection and light calculation are improved.

The invention relates to a tide level obtaining method and system based on an OWC wave energy conversion device. The method comprises the following steps: constructing an energy loss prediction model in the air chamber; acquiring field incident wave energy, reflected wave energy, water potential energy increment, kinetic energy increment and pneumatic output energy at the current time period; inputting incident wave energy and reflected wave energy into the model to obtain predicted energy loss; and the tide level variation is solved based on the energy conservation relational expression, and the current tide level is calculated. The system comprises an energy loss prediction module, a wave energy acquisition module, a water body energy acquisition module, a pneumatic output acquisition module, an energy loss calculation module, a tide energy solving module and a tide level calculation module, which cooperatively realize the method. According to the scheme, an external tide gauge station is not needed, the local sea area tide level can be inversed in situ, at high frequency and with high precision, the method is suitable for an OWC-breakwater fusion scene, and cooperative operation of a port and ocean energy is supported.

The invention relates to a super-large L-shaped high-sea-condition high-precision absorption type wave maker system and a wave simulation method.The wave maker system comprises a central control layer, an equipment control layer and an execution mechanism layer which are sequentially connected, and the central control layer is characterized in that a main control computer operates wave making control software; a target wave time calendar curve is generated, theoretical motion instructions needing to be executed by the wave making plates are synchronously deduced, the main PLC conducts format conversion and time sequence synchronization processing on the theoretical motion instructions, and wave making plate displacement curve instructions are generated and issued; the equipment control layer is used for calculating active absorption compensation from the PLC and generating a motor motion instruction; the executing mechanism layer comprises a super-large L-shaped wave making unit, a fan-shaped driving arm, a plurality of motors and other assemblies to execute wave making motion and feed back wave height information, and the motors drive the fan-shaped driving arm to drive a wave making plate to swing around a hinge assembly and drive the wave making plate to execute compensation action opposite to the phase of incident waves; high-sea-condition wave simulation and high-precision wave active absorption are realized, and a full-wave-direction test with navigational speed is supported.

An antenna includes a supporting layer and a reflection element disposed on the supporting layer configured to reflect an incident wave with a respective reflection phase, the reflection element extending perpendicularly from the supporting layer at a height configured to achieve the respective reflection phase, and both the supporting layer and the reflection element being formed with an all-dielectric material. The antenna is not susceptible to metallic corrosion and has flexible design freedom. It is in a simple and compact structure for providing complete reflection and phase adjustment simultaneously. The simple structure of the antenna enables it to be manufactured in an efficient and cost-effective manner.

The invention belongs to the technical field of electromagnetic wave functional materials, and particularly relates to a nested split ring wave-absorbing metamaterial and a preparation method thereof. The wave-absorbing metamaterial sequentially comprises an FSS metal structure layer, a dielectric layer and a metal matrix layer from top to bottom in the thickness direction, the FSS metal structure layer is formed by distributing structure units in a periodic array mode, each structure unit is composed of a double-opening outer ring shaped like a Chinese character'hui 'and a double-opening inner ring, the double-opening outer ring is a split square, and the double-opening inner ring is a hollow square. The structural units are symmetrically arranged about the diagonal line of the dielectric layer. The FSS metal structure layer designed by the invention has anisotropy, so that the polarization direction of an incident wave can be rotated by 90 degrees in a reflection mode. By means of the design, the two functions of electromagnetic wave absorption and polarization conversion are achieved at the same time, and meanwhile the effect of multiband wave absorption is achieved. Within the frequency band of 4 GHz to 18 GHz, the maximum wave-absorbing strength of the nested wave-absorbing metamaterial is as high as-30 dB, and the effective wave-absorbing bandwidth can reach 7.5 GHz.

The invention belongs to the technical field of antennas, and particularly relates to an ultrathin full-space metasurface unit with dual-band amplitude-phase regulation and control and a multi-beam generator. In order to solve the problems that component design cost is high, unit amplitude is low, and incident wave energy cannot be efficiently regulated and controlled, the full-space metasurface unit comprises a first metal layer and a second metal layer, the first metal layer is located above the second metal layer, a dielectric plate is arranged between the first metal layer and the second metal layer, and the dielectric plate is located between the first metal layer and the second metal layer. A first C-shaped groove and a double split ring resonator are etched on the first metal layer from outside to inside in a hollowed-out manner, a second C-shaped groove and an elliptical groove are etched on the second metal layer from outside to inside in a hollowed-out manner, and the opening directions of the first C-shaped groove and the second C-shaped groove are perpendicular to each other. And the multi-beam generator is designed based on the total space metasurface unit.

The invention relates to the technical field of electromagnetic scattering, in particular to an electromagnetic scattering characteristic prediction method and device, equipment and a storage medium. The invention discloses an electromagnetic scattering characteristic prediction method, and the method comprises the steps: carrying out the joint construction of a target structure parameter, a material electromagnetic parameter, and an incident wave parameter according to a preset mapping function, so as to obtain a joint output vector; performing simulation processing on the joint output vector according to a simulation method; training a preset incremental network model according to the simulation result and the simulation data set to obtain an updated main network model; acquiring real-time structure scene parameters, and predicting the real-time structure scene parameters according to the updated main network model to obtain electromagnetic scattering characteristics; comprehensive parameters are obtained, multi-source data are fused, a training data set is generated through simulation, an incremental network model is dynamically optimized, conventional recognition and new parameter adaptation are considered, the main network is updated, the electromagnetic scattering characteristics are predicted in real time, efficient support is provided for engineering such as radar detection, and the research and development quality and efficiency are improved.

The invention discloses a spectacle lens with a hexagonal cylindrical microstructure on the surface, and relates to the technical field of optical lenses, and the spectacle lens comprises a lens main body which is divided into a central optical area, a hexagonal cylindrical microstructure distribution area and a peripheral optical area from inside to outside in sequence by taking the geometric center of the lens main body as a circle point, the hexagonal cylindrical surface microstructure is arranged on the surface of the lens main body and comprises a plurality of regular girdle cylindrical surface microstructures and inverse girdle cylindrical surface microstructures which are concentrically arranged, the regular girdle cylindrical surface microstructures and the inverse girdle cylindrical surface microstructures are alternately arranged in the radial direction, and irregular astigmatism generates high-order disturbance on incident wave surfaces of human eyes. The method is mainly suitable for teenagers with fast myopia development, and low-order and high-order aberrations and myopia defocus can be alternately introduced into the peripheral retina view field, so that the effect of preventing and controlling the myopia of the teenagers is improved.

This invention provides a split Hopkinson bar device for achieving single-pulse loading, comprising an incident bar, a transmission bar, an incident wave-catching unit, and a stress wave generating unit. The incident wave-catching unit includes an incident wave-catching sleeve and an absorbing bar. One end of the absorbing bar is spaced apart from the incident bar flange, and the other end is connected to the absorbing bar flange. The incident wave-catching sleeve is fitted around the absorbing bar, with its two ends respectively fitting against the absorbing bar flange and the incident bar flange. The compressive stress wave generated by the stress wave generating unit is reflected by the incident bar flange to form a tensile stress wave. After loading the sample, a portion of the stress wave is reflected back as a compressive wave and absorbed by the incident wave-catching unit. This solves the problem of multiple reflections and interference in traditional Hopkinson bars, achieving pure single-pulse tensile loading. The device is compact, has high energy utilization, and is suitable for testing the dynamic mechanical properties of materials.

The invention relates to a line-to-circular polarization Huygens transmission array, which comprises a plurality of transmission array units arranged according to a square matrix form, each transmission array unit sequentially comprises a first metal layer, a dielectric substrate layer and a second metal layer from top to bottom, the first metal layer is located on the upper surface of the dielectric substrate layer, and the second metal layer is located on the lower surface of the dielectric substrate layer. The second metal layer is located on the lower surface of the dielectric substrate layer; the first metal layer comprises a C-like rectangular ring group arranged along the x direction and a C-like rectangular ring group arranged along the y direction; the second metal layer comprises a C-like rectangular ring group arranged along the x direction and a C-like rectangular ring group arranged along the y direction; the structures and sizes of the C-like rectangular ring groups placed in the x direction are the same, and the structures and sizes of the C-like rectangular ring groups placed in the y direction are the same. Compared with the prior art, the problem that an existing line-to-circular polarization transmission array antenna is low in aperture efficiency is solved, and the antenna has the function of focusing and converting a linear polarization spherical incident wave into a circular polarization plane transmission wave based on phase compensation.

The invention discloses an ultra-wideband high-efficiency absorber in the technical fields of optics, material science and energy, which takes silicon dioxide (SiO2) as a substrate, and a titanium (Ti) nano rectangular body array is arranged above the substrate; a silicon nitride (Si3N4) regular hexagonal prism array is constructed on the top of the titanium layer, six cylindrical holes are etched in the midpoint of each vertex of a regular hexagon on the bottom surface of the titanium layer, and magnesium fluoride (MgF2) is filled in the cylindrical holes to form magnesium fluoride nano cylinders; a chromium (Cr) ring and a silicon nitride ring are sequentially superposed at the top end of the hexagonal prism and are tangentially matched with the hexagon on the top surface of the hexagonal prism. According to the UWB-HEA, the incident wavelength ranges from 400 nm to 4000 nm, the designed efficient absorption range (namely absorption band) of the UWB-HEA covers from near-infrared 855 nm to mid-infrared 3540 nm, about 2685 nm, the average absorption rate of 96.67% is achieved under TM waves, and the highest absorption rate is 99.66%; the average absorption rate of 96.44% is achieved under TE waves, the highest absorption rate is 99.72%, and the absorption rate is almost unrelated to polarization. In order to reduce radiation energy loss of an object, an ideal solar heat absorber needs to realize efficient light absorption in a wide wave band range.

The invention provides a composite material damage imaging method and system, and belongs to the technical field of material detection.The composite material damage imaging method comprises the steps that original signals are processed through a frequency domain analysis method, and environmental noise in the signal acquisition process is filtered out; establishing a full wave field data energy curve based on the original signal after the environmental noise in the signal acquisition process is filtered out, and analyzing the attenuation characteristic and the global distribution condition of wave field energy; compensating the original signal based on the attenuation characteristic, obtaining a compensation wave field based on the compensated original signal, and selecting a time window of damage imaging based on the global distribution condition of the energy of the compensation wave field; constructing a damage index based on a wave field gradient, and calculating a wave field damage matrix; and calculating a spatial distribution matrix of damage indexes by adopting an MS effective value based on a time window and a wave field damage matrix of damage imaging, and performing image fusion based on the spatial distribution matrix to create a final damage image. According to the method, the influence of strong incident wave components on damage identifiability is inhibited, and accurate identification of multiple damages is realized.

The application provides a kind of ice constant temperature dynamic mechanical property testing device, belongs to ice detection technical field, including launch subassembly, impact lever, incident support, incident lever, sample support, transmission support, transmission lever, data acquisition module and data processing module, the end face of impact lever towards incident lever is equipped with several spaced convex structures, the end face of incident lever towards impact lever is equipped with shaping piece, shaping piece is used to extend the rising time of incident stress wave that incident lever transmits to ice sample, the end face of incident lever towards ice sample is equipped with wave modulation module, wave modulation module is used to realize the wave impedance continuous gradient matching of incident stress wave from incident lever to ice sample, data processing module corrects the data collected by data acquisition module to obtain final incident wave strain and final transmission wave strain, and calculates the strain rate, stress and strain of ice sample.The application scheme improves the accuracy of ice constant temperature dynamic mechanical property test results.

The present application relates to the technical field of optical aspheric surface, especially points to a kind of free curved surface characterization method based on CGH lens zero position compensation detection optical path, with the detection of free curved surface as the guide, based on zero position compensation detection principle, according to ray tracing method, Snell's law, diffraction principle and equal optical path principle, using the parameters required by interferometer incident wave front as plane wave, compensator as single CGH lens zero position compensation detection system indirectly characterizes free curved surface shape, by using XY polynomial and Zernike standard phase polynomial, the mathematical description of free curved surface is realized in design stage can determine its measurement scheme, and according to the characterization method self-defined a kind of aspheric surface type, called zero position free curved surface.The free curved surface characterization method improves the degree of freedom of free curved surface shape and the feasibility of zero position compensation method, reduces the detection difficulty of free curved surface shape, realizes the function of zero position free curved surface design can be detected.

The invention provides a curved surface polarization torsion reflecting surface and an antenna using the same, and belongs to the technical field of antennas. The curved surface polarization torsion reflection surface comprises a curved surface dielectric plate, and a metal bottom plate and an electromagnetic metasurface which are respectively arranged on the outer side and the inner side of the curved surface dielectric plate; the electromagnetic metasurface is formed by periodically arranging a plurality of single-layer electromagnetic metasurface units. The single-layer metasurface unit with the polarization torsion function is conformal on the curved surface, so that the technical problems that a traditional multi-layer planar polarization torsion structure is complex to process, curved surface conformal is difficult, and the performance is deteriorated after conformal are solved. The reflecting surface is preferably a paraboloid, so that the incident wave polarization torsion is realized, and the spherical wave can be converted into the plane wave to improve the antenna gain. The metasurface unit keeps good cross polarization reflection performance within the wide incidence angle range of 0-40 degrees, is suitable for curved surface conformal design, can be integrally formed through 3D printing, and is easy and convenient to machine and stable in performance.

The invention discloses a broadband low-scattering reflection surface based on a back-loaded active microstrip network, which integrates an antenna unit with the back-loaded active microstrip network to control the response of the low-scattering reflection surface to incoming waves. Wherein the antenna unit sequentially comprises a top dielectric matching layer, a dipole patch, a first dielectric substrate, a coupling capacitor metal disc, a second dielectric substrate, a metal floor and a third dielectric substrate from top to bottom; the back-loaded active microstrip network is arranged below the third dielectric substrate; after receiving an incident wave, the antenna unit transmits the incident wave into the back-loaded active microstrip network, and after network processing, the incident wave is radiated to a free space through the antenna unit; the back-loaded active microstrip network realizes phase control of TE polarized reflected waves by adjusting the on-off state of the PIN tube, and realizes absorption of TM polarized incoming waves by loading a resistor in the middle of the short-circuit microstrip line. According to the invention, low profile and miniaturization are ensured, and wave absorbing and active scattering regulation and control functions are realized at the same time.

The invention provides a diffusion screen and a display device. The diffusion screen and the display device can be applied to a vehicle-mounted system and a vehicle. When the diffusion screen provided by the invention is applied to the display device, the quality of a display image can be improved, so that the user experience is improved. Specifically, the diffusion screen comprises a first surface, a plurality of first main areas are distributed on the first surface, and each first main area comprises N1 first secondary areas. Each first area in the N1 first areas is a micro-lens array, meanwhile, the period of each first area is one of M periods included in the diffusion screen, and the M periods are used for matching diffraction angles of red light, green light and blue light in incident wavelengths. Specifically, the period of each first area is the distance between the centers of any two adjacent microlenses in the corresponding microlens array. Wherein N1 is an integer greater than or equal to 3, M is an integer greater than or equal to 3, and M is less than or equal to N1.

To provide a laminate structure that can obtain electromagnetic wave transmission or blocking performance required for design while using a metal layer as it is without processing it.SOLUTION: A laminate structure 10 is configured such that the intensity of the outgoing wave relative to the incident wave is stronger for electromagnetic waves below a predetermined frequency than for electromagnetic waves above a predetermined frequency, and includes a laminate 1 having at least one plate material 2 and a metal layer 3 laminated on the at least one plate material 2, and a metasurface sheet 4 attached to the laminate 1, and the metasurface sheet 4 is configured such that the intensity of the outgoing wave relative to the incident wave is stronger for electromagnetic waves of the predetermined frequency or higher than for electromagnetic waves of below the predetermined frequency.SELECTED DRAWING: Figure 3

The application provides a method for aligning a microchip sensing device and a waveguide by measuring the intensity of reflected waves. Electromagnetic waves with different reflectivity on the sensing device and the chip structure adjacent to the sensing device are selected, and the electromagnetic waves are incident on the surface of the microchip through the waveguide. The position, angle and distance of the output port of the waveguide relative to the surface of the microchip are adjusted, so that the electromagnetic waves are vertically incident on the surface of the microchip and are reflected, and then re-enter the output port of the waveguide and propagate reversely in the waveguide. The method uses a waveguide element to separate the reflected waves from the incident waves, and measures the intensity of the reflected waves relative to the incident waves. By adjusting the horizontal position of the output port of the waveguide relative to the sensing device, and observing the jump of the intensity of the reflected waves when the incident area of the electromagnetic waves transitions from the sensing device to the chip structure adjacent to the sensing device, the boundary of the sensing device can be determined, and the electromagnetic waves output by the waveguide can be incident on the sensing device. The application can reduce the alignment cost and improve the signal coupling efficiency.

The invention belongs to the technical field of wave energy power generation control, and provides a wave energy efficient conversion device based on dynamic fixed-point wave gathering and a control method, and the efficient conversion device comprises a first reflected wave adjusting structure, a second reflected wave adjusting structure and a rotation driving unit; the first reflected wave adjusting structure and the second reflected wave adjusting structure can independently rotate around respective rotating shafts, the radial distance between the rotating shafts and the fixed point position is kept unchanged, so that the orientation of the generated reflected wave is independently adjusted, and the fixed point position is located in a constructive interference area of the incident wave and the reflected wave; the rotation driving unit is used for driving the first reflected wave adjusting structure and the second reflected wave adjusting structure to rotate independently. According to the efficient conversion device and the control method, by dynamically adjusting the reflection angles of the two reflected waves, the fixed point position is always located in the constructive interference area of the waves, and efficient conversion of wave energy under various sea conditions is achieved.

The present application relates to the technical field of optical aspheric surface, especially refers to a kind of splicing aspheric surface characterization method based on CGH lens zero position compensation detection optical path, with the detection of aspheric surface as the guidance, based on zero position compensation detection principle, according to ray tracing method, Snell's law, diffraction principle and equal optical path principle, using the parameters required by the zero position compensation detection system of interferometer incident wave front as plane wave, compensator as single CGH lens and diffraction surface as binary optical surface 3 or binary optical surface 4 to characterize aspheric surface surface shape, and according to the aspheric surface type defined by the characterization method, it is called zero position splicing aspheric surface.According to the splicing aspheric surface characterization method, the measurement scheme can be determined in the design stage through the mathematical description of splicing aspheric surface, which avoids the influence of stray light and projection distortion of CGH detection, reduces the detection difficulty of splicing aspheric surface surface shape, and realizes the function of zero position splicing aspheric surface design.

The utility model provides a material measuring system with a multi-line scanning function. The material measuring system comprises a plurality of signal modules, a plurality of reflecting structures and a driving mechanism, the signal module is at least used for generating a transmitting wave beam and receiving an incident wave beam; the reflection structure is used for reflecting the transmitting wave beam generated by the signal module to form an emergent wave beam; the reflecting surface of the reflecting structure and the transmitting beam of the signal module form a plurality of first angles, and the reflecting surface of the reflecting structure and the emergent beam form a plurality of second angles; the reflection structures and the signal modules are arranged in a one-to-one correspondence mode. And the driving mechanism is used for driving the plurality of reflection structures and / or the plurality of signal modules to rotate so as to realize multi-line scanning of the surface profile of the material. According to the invention, the driving mechanism drives the signal modules and / or the reflection structures to rotate, so that the reflection surfaces of the reflection structures and the emission beams of the signal modules form a plurality of first angles, and the reflection surfaces of the reflection structures and the emission beams form a plurality of second angles, and three-dimensional scanning of the surface of the material is realized.

The invention relates to the technical field of computational electromagnetism, in particular to a metasurface scattering behavior analysis method and device, equipment and a storage medium. The method comprises the following steps: tracking an incident wave emitted into the metasurface based on geometrical optics; for the tracked incident wave, determining a first relationship between the equivalent surface current and the scattered field based on physical optics; determining an equivalent surface current based on the generalized boundary condition and a surface polarizability model; and determining a scattering field by combining the equivalent surface current and the first relationship by adopting Gordon integral. According to the metasurface scattering behavior analysis method provided by the embodiment of the invention, the surface polarizability model is combined with physical optics and geometrical optics, so that the scattering behavior related to the metasurface target can be effectively analyzed, and meanwhile, the calculation amount is reduced.

A plasma generator by means of a resonant waveguide is disclosed. The plasma generator comprises: an annular or elliptical central waveguide that includes a plurality of slots on the inner side surface thereof; a first incident waveguide that is tangentially connected to the central waveguide to enable electromagnetic wave communication; an electromagnetic wave supply unit that transmits electromagnetic waves to the incident waveguide; and a plasma chamber that has an electromagnetic wave incident window which is positioned on an outlet side of the slots to seal the inside of the central waveguide, and through which electromagnetic waves introduced through the slots may be radiated to the outside.

A system for detecting angle of arrival comprises an array of metamaterial or resonant elements that share a dielectric substrate and a metallic ground layer, wherein each of the metamaterial or resonant elements includes a switchable component; an opening in the ground layer configured to couple an incident wave signal; and a waveguide below the ground layer configured to guide the coupled signal to a receiving circuit including an intensity or power meter. A method for detecting angle of arrival comprises providing the system as described above; coupling an incident wave signal to the shared substrate; guiding the coupled signal from the shared substrate to the receiving circuit via the waveguide; measuring the coupled signal via intensity or power meter of the receiving circuit; and calculating an angle of arrival based on the measured intensity or power.

A radio apparatus that has a high heat dissipation performance and can be manufactured at a low cost is provided. A radio apparatus includes a heat dissipation part that dissipates heat generated by a heat generation source to the outside. The heat dissipation part is composed of a solid material, and includes a heat dissipation plate and a plurality of heat dissipation fins provided in the heat dissipation plate, the plurality of heat dissipation fins being disposed on a side of the heat dissipation plate where a radiating element or a reflective element is disposed. The heat dissipation fins form a periodic structure along at least one direction on the heat dissipation plate. Tips of the plurality of heat dissipation fins form a virtual reflective surface that reflects incident waves to the plurality of heat dissipation fins.

The present invention belongs to the field of wave energy power generation, and discloses a method for optimizing the structure of an array of heterogeneous floating wave energy devices. In combination with the technical properties of the wave energy device, a frequency band reconstruction and division strategy for the input wave energy spectrum is given; based on the energy spectrum theory, the equivalent energy capture of the device in the full frequency band is derived, and the energy contribution of the devices in the array in each frequency band is clarified; with the input wave spectrum as the target spectrum, the array configuration design is carried out, the ratio of the floats in the array is clarified, and the array output level and the resource are accurately matched, thereby improving the development and utilization efficiency of the array. This method comprehensively considers factors such as the mass, resonance bandwidth, natural frequency, and applied PTO damping of the float, and establishes a connection between the influencing factors. In a simple and quick way, it efficiently finds the heterogeneous floating wave energy device that meets the requirements under specific sea conditions. The array composed of heterogeneous floating wave energy devices can absorb the incident wave energy in the full frequency band, greatly improving the utilization rate of wave energy.

The invention discloses a method and system for calculating a seismic oscillation amplification coefficient of a river valley field under SV wave incidence, and belongs to the technical field of rock-soil seismic engineering, and the method comprises the steps: building a model; analyzing an infinitesimal body; establishing a free field; establishing a scattering field; substituting boundary conditions; solving a matrix equation; and calculating an amplification coefficient. According to the method, a wave field caused by an irregular terrain of the earth surface is constructed by an interval decomposition strategy taking a terrain cuspidal point as a demarcation point, a method for calculating the seismic oscillation amplification coefficient of the river valley field under SV wave incidence is provided, and the influence of factors such as river valley geometric parameters, material parameters, the frequency and incident angle of incident waves and the like on the river valley seismic oscillation amplification coefficient is revealed; a theoretical basis is provided for aseismic design of major projects of river valleys; the calculation method is a semi-analytical method, reveals the physical nature of irregular terrains on seismic wave propagation and scattering, improves the calculation precision and efficiency, and can be used as a reference for verification of a numerical method.

The application discloses a kind of through type radio frequency microwave vector analysis device and method, device includes radio frequency front end and down conversion module, digital acquisition and processing module and control and interactive module.Radio frequency front end and down conversion module are used for the transmission of radio frequency signal, two-way coupling sampling and coherent down conversion;Digital acquisition and processing module are used for collecting signal and processing, obtain pure incident wave signal and reflected wave signal;Control and interactive module are used for controlling each module, and carry out man-machine interaction.The application is realized by using through type measurement architecture, under the premise that the signal transmission of measured system is not interrupted, realizes the online vector analysis of radio frequency signal, and does not need built-in signal source, and then complete vector parameter such as reflection coefficient, impedance, standing wave ratio can be accurately calculated.