120 results about "Radiation loss" patented technology

The invention discloses a terahertz sensor based on graphene Fano resonance and a regulation and control method and application thereof, and relates to the technical field of sensing devices, the terahertz sensor comprises a substrate layer, a dielectric layer and a graphene layer, the graphene layer comprises at least one unit structure arranged on the dielectric layer, each unit structure comprises two long graphene ribbons arranged in parallel at intervals and four short graphene ribbons arranged between the two long graphene ribbons, the four short graphene ribbons are symmetrically arranged at the two ends of the two long graphene ribbons in pairs, and the outer ends of the short graphene ribbons are flush with the ends of the long graphene ribbons. Fano resonance is combined with the graphene terahertz sensor, electric dipole resonance caused by the action of an electric field and a magnetic field is utilized to generate a Fano resonance phenomenon, radiation loss is effectively reduced and the Q value of the sensor is improved through destructive interference action between a light mode and a dark mode, and the terahertz sensor has good sensing performance and can be used for sensing terahertz waves. The method has important application potential in the aspects of biomedicine and sample detection.

The invention provides a robust optimization method and device for a low-frequency sound absorption metamaterial, and relates to the technical field of punching, and the method comprises the steps: obtaining a response function of a target metamaterial through employing a linear one-dimensional rheological model; determining a target coupling region by using an imaginary part of a transfer function zero point corresponding to the response function or a size relationship between inherent loss and radiation loss as a coupling criterion, and determining a closed coupling region where a preset parameter point is located as an initial robust region; the target coupling region comprises a closed coupling region; the preset parameter point meets the one-dimensional frequency domain response of the target metamaterial; and determining the size of the initial robust region by using the Lexberg measure of the Euclidean space, and optimizing the robust region by maximizing the Lexberg measure of the initial robust region in the Euclidean space to obtain a target robust region. According to the method, the maximum robust region in the parameter space is found through maximum measurement, so that the response characteristics of the viscoelastic damping material under the actual working condition can be accurately described.

The invention relates to a dual-frequency electromagnetic metasurface unit, array and method for enhancing underground signal coverage, and the metasurface unit comprises a dielectric layer which comprises a first dielectric layer and a second dielectric layer; the surface of the first dielectric layer is provided with a metal resonance layer, and a metal isolation layer is arranged between the two dielectric layers; feeder lines are arranged at the bottoms of the two dielectric layers; a first resonance piece of the metal resonance layer is located in the middle of the surface of the first dielectric layer, and a first metal column penetrating through the first resonance piece and the first dielectric layer is arranged in the middle of the first resonance piece; the second resonance piece and the third resonance piece are respectively positioned on two adjacent side parts of the surface of the first dielectric layer and are connected with the first resonance piece through a diode; one end of the second resonance piece and one end of the third resonance piece are respectively provided with metal columns. One end of the feeder line is connected with the metal column. According to the dual-frequency electromagnetic metasurface unit, array and method for enhancing underground signal coverage, energy loss and radiation loss can be reduced, and the dual-frequency electromagnetic metasurface unit, array and method have efficient electromagnetic wave reflection capacity in a low frequency range.

The invention discloses a photovoltaic module irradiation dose determination method and device, equipment and a storage medium, and relates to the technical field of photovoltaic power station design, and the method comprises the steps: calculating a sunlight direction vector; determining a shielding object in the virtual photovoltaic module installation area, and determining a shadow area projected by the shielding object on the virtual photovoltaic module; determining an inclination angle between the virtual photovoltaic module and the ground and an azimuth angle between the virtual photovoltaic module and the sunlight direction vector, and determining an irradiation loss coefficient corresponding to the virtual photovoltaic module by using the geographic position information, the inclination angle and the azimuth angle; and obtaining the total irradiation dose of the horizontal plane in unit time, and determining the annual comprehensive irradiation dose of the virtual photovoltaic module according to the total irradiation dose, the irradiation loss coefficient and the shadow region, so as to determine the installation position of the target photovoltaic module according to the annual comprehensive irradiation dose. The full-year irradiation dose of the photovoltaic module is obtained by using the sunlight direction vector shadow region and the irradiation loss coefficient, so that the installation position of the photovoltaic module can be determined according to the irradiation dose.

An arc chamber that includes one or more components that include a low thermal conductivity region is disclosed. The low thermal conductivity region may be formed using additive manufacturing to create a lattice pattern, stochastic infill, or hollow void. The low thermal conductivity regions are used to direct the flow of heat to desired areas, such as the faceplate of the arc chamber. The lattice pattern may be located within the end plates of the arc chamber, such that the heat from the cathode and repeller are directed toward the faceplate and away from the bottom of the arc chamber. The lattice pattern may also be located in the side walls and the bottom wall to reduce the amount of heat that is lost to the environment through conduction and radiation.

The invention relates to an electromagnetic wave polarization conversion system and conversion method based on a non-Hermite metasurface, the conversion system comprises a dual-port model having an x polarization mode and a y polarization mode, and the dual-port model satisfies that the two polarization modes have the same resonant frequency omega0, radiation loss gamma and intrinsic loss gamma, certain coupling strength kappa exists between the two polarization modes, and the resonant frequency omega0, the radiation loss gamma, the intrinsic loss gamma and the coupling strength kappa meet the condition that when x polarized waves / y polarized waves are only emitted to the two sides of the dual-port model, the corresponding emitted x polarized waves / y polarized waves are 0, and the emitted x polarized waves / y polarized waves are 0. Therefore, the dual-port model forms an equivalent PT symmetrical metasurface structure with the maximum linear polarization conversion efficiency. Electromagnetic wave polarization conversion is achieved through the PT symmetric metasurface based on the equivalent gain, materials do not need to have real gain or different losses of oscillators in a structure are not required, and material use and structural design can be simplified.

The invention discloses a Fano resonance sensor based on a surface plasmon coupled planar waveguide. The Fano resonance sensor sequentially comprises a zinc selenide prism, a bismuth selenide layer Bi2Se3, a Teflon layer Teflon, a silicon dioxide layer SiO2, a TiO2 layer and a dielectric layer to be measured from top to bottom. Compared with a traditional sensor, the sensing characteristic spectrum line width of the model is narrower, the local electromagnetic field is greatly enhanced, the radiation loss of the traditional SPR sensor is remarkably reduced, and the sensitivity is improved by at least two orders of magnitude. The SPR effect excited by the bismuth selenide material is coupled with a PWG mode generated by a planar waveguide structure composed of silicon dioxide, titanium dioxide and a to-be-detected medium to generate the optical sensor with Fano resonance as a mechanism, the sensitivity can reach 7700 RIU <-1 > or above within an existing parameter adjusting range, and compared with a traditional SPR sensor, the sensitivity of the optical sensor is greatly improved. Performance indexes such as sensitivity are improved by 2-3 orders of magnitude.

The utility model discloses a high-gain ultra-wideband antenna based on a metamaterial frequency selective surface, and relates to the technical field of electromagnetic materials and antenna microwaves. The high-gain ultra-wideband antenna of the utility model is composed of an ultra-wideband microstrip antenna and a frequency selective surface. The ultra-wideband microstrip antenna comprises a top layer, a middle layer and a bottom layer grounding plate; the top layer is composed of a circular radiation patch and a rectangular microstrip feeder line; the middle layer is a first dielectric substrate; the frequency selective surface is formed by periodically arranging a plurality of surface unit structures; the surface unit structure is composed of a metal unit layer and a second dielectric substrate, a circular groove is formed in the center of the metal unit layer, four right-angle grooves are evenly distributed around the circular groove, and four right-angle wire grooves are correspondingly formed outside the four right-angle grooves. Through the loaded frequency selection surface structure, the back radiation loss of the ultra wide band antenna can be reduced in the UWB (3.1 GHz-10.6 GHz) frequency band, the antenna gain can be effectively improved, and the ultra wide band antenna has the characteristics of miniaturization and low cost.

The invention discloses an optimization method of a low-loss bending waveguide, which comprises the following steps: firstly, adopting NA bending as a basic bending path, determining two optimal boundary NA curves for a given equivalent bending radius Reff, and forming a width gradually-changed NA bending waveguide structure; lateral shift amounts din and dout are introduced into the input end and the output end of the constructed NA bending waveguide structure with the gradually-changed width respectively, and optimal lateral shift amounts din and dout are obtained through step-by-step parameter scanning and simulation optimization; and based on the optimal lateral shift amounts din and dout, obtaining a curved waveguide structure combining an NA curved path, width gradient and a specific lateral shift parameter. According to the method, the mode mismatch loss and the radiation loss can be remarkably reduced at the same time for the NA bending waveguide with the ultra-small radius, and the total transmission loss of the bending waveguide is further reduced on the basis of the prior art.

The invention discloses a grounding coplanar waveguide with low radiation loss and high signal uniformity, and belongs to the field of magnetic parameter measurement. The grounding coplanar waveguide comprises a bottom metal grounding layer, a medium substrate, a grounding through hole, a signal line, a split signal line and two side metal grounding layers. The dielectric substrate is arranged above the metal grounding layer, two-side metal grounding layers are arranged above two sides of the dielectric substrate, the two-side metal grounding layers are respectively provided with more than two columns of grounding through holes to form a through hole array, a split signal line is arranged in the middle position above the dielectric substrate, and two ends of the split signal line are respectively connected with signal lines. One end of the split signal line is connected with a signal input end, and the other end is connected with a signal output end; the bottom metal grounding layer and the two side metal grounding layers are connected through grounding through holes. According to the invention, the phenomenon of broadening of a test curve caused by non-uniform distribution of a surface magnetic field is avoided, so that the test precision is improved to a great extent, and the radiation loss at a high-frequency position of the grounded coplanar waveguide is reduced.

The invention discloses an air medium-filled suspended slot line structure, which is an air medium-filled suspended slot line structure based on an MISL platform and is formed by stacking a plurality of layers of metal plates, a self-packaging structure is formed, a slot line structure of a main circuit is arranged on one layer of metal plate inside, and the other layer of metal plate is arranged on the other layer of metal plate inside. And hollow cavities filled with air are formed in the metal plates above and below the slot line structure of the main circuit through partial cutting. According to the invention, a multi-layer metal plate stacking structure is adopted to form a multi-layer self-packaging structure, etching can be carried out on the internal metal plates to form a slot structure, and mediums in the slot structure and above and below the metal plates where the slot structure is located are air, so that dielectric loss caused by a slot line structure designed based on a traditional PCB is thoroughly eliminated, and the reliability of the slot line structure is improved. And therefore, relatively low loss can be realized. Due to the adoption of a self-packaging structure, an electric field is mainly distributed in air in the packaging structure, so that the radiation loss of the slot line can be greatly reduced.

The utility model discloses a heating plate thermal insulation device for pultrusion, which comprises a heating plate, a pultrusion mold matched with the heating plate is fixedly connected onto the inner wall of the heating plate, heat conduction pipes are mounted on the outer walls of two ends of the heating plate, and a thermal insulation device matched with the heating plate is fixedly connected onto the outer wall of the heating plate. The heating plate heat preservation device for pultrusion is characterized in that the heat preservation device is of a multi-layer composite structure, the multi-layer composite structure comprises a heat preservation plate outer layer, a heat preservation plate middle layer and a heat preservation plate inner layer, and a heating plate plug port is formed in the outer wall of one end of the heating plate. The heat preservation layer is completely attached to the outer wall of the heating plate, the problems of heat preservation dead corners, serious heat loss and the like of the heating plate are solved, the heat preservation layer is of a multi-layer composite structure, heat conduction, convection and radiation loss are effectively prevented, the energy utilization rate is increased, and the pultrusion quality is guaranteed.

The utility model aims to provide a strip line broadband phase shifter. The strip line broadband phase shifter comprises a substrate I, a substrate II and a substrate III, the top surface of the substrate I is integrally covered with a metal layer I, and the bottom surface of the substrate III is integrally covered with a metal layer II; a main line I, a main line II and a Port2 port are respectively arranged on the bottom surface of the substrate I and the top surface of the substrate II; and a main line III, a main line IV, a reference line, a Port 1 port, a Port 3 port and a Port 4 port are respectively arranged on the bottom surface of the substrate II and the top surface of the substrate III. The antenna is small in electromagnetic radiation, is low in radiation loss, is high in anti-interference capability, and can be suitable for occasions where a phased array radar is high in anti-interference capability.

In at least one embodiment, the environment sensor for sensing at least one environment parameter includes a semiconductor layer sequence, a sheath, the index of refraction of which changes as a function of the environment parameter, and a first electrical contact and a second electrical contact for supplying current to the semiconductor layer sequence. The semiconductor layer sequence has the shape of a generalized cylinder having a main axis. In directions perpendicular to the main axis, the semiconductor layer sequence is at least partly covered by the sheath. The semiconductor layer sequence has an index of refraction which is greater than the index of refraction of the sheath. The semiconductor layer sequence is designed to form laser modes within the environment sensor. Furthermore, the environment sensor is designed such that, in its normal operation, a change in the index of refraction of the sheath causes a change in the electrical resistance of the semiconductor layer sequence as a result of a change in radiation losses within the semiconductor layer sequence.

The present invention discloses an ultra-narrowband absorber tunable from visible to mid-infrared, and its structure includes a substrate, a bottom Bragg reflector, a resonant cavity layer, a lower electrode, a dielectric spacer layer, an upper electrode, a bilayer graphene structure capable of mutual electrostatic gating, and a top Bragg reflector. The absorber is based on Fabry-Perot cavity resonance to form a resonance mode within the resonant cavity layer between the bottom and top Bragg reflectors. The radiation loss rate of this resonance mode is mainly determined by the constituent components, the number of periods of the Bragg reflector, and the Fermi level of graphene together, while the absorption loss rate is determined by the Fermi level of graphene. The bandwidth of the resonance mode is jointly determined by the magnitudes of the radiation loss rate and the absorption loss rate. By constructing a Bragg reflector with appropriate components and number of periods and regulating the Fermi level of graphene to make the system reach critical coupling, an ultra-narrowband perfect absorption tunable from visible to mid-infrared can be achieved.

A diffraction grating coupler (10) is provided with: a diffraction grating (12) having a plate-shaped base material (121) and different refractive index regions (122) that are periodically arranged in a one-dimensional or two-dimensional manner within a predetermined range of the base material (121) and have a refractive index different from that of the base material (121); and a light reflecting section (14) provided at an end of the range on the opposite side from the light input section (13) side, the different refractive index region (122) having a planar shape in which the absolute value of the direct coupling coefficient (kappa 1D) is less than 1 / L, the direct coupling coefficient (kappa 1D) is an index indicating the intensity of light traveling from the light input unit (13) in a first direction (positive x-direction) parallel to the base material (121) reflected in the different refractive index region (122) in a second direction (negative x-direction) that differs by 180 DEG from the first direction (positive x-direction) without any radiation loss. The 1 / L is the reciprocal of the span length (L) of the range in relation to the first direction (positive x direction), and the light input portion (13) is a part of the end portion of the range.

A miniaturized high-Q coaxial resonant cavity, comprising: a metal cavity, a cover plate, and a metal resonant rod; the metal cavity is a three-dimensional geometric shape of a column or a cuboid, and the cover plate is located on the top of the metal cavity, so that the metal cavity becomes a closed space to reduce radiation loss; a metal resonant rod is arranged inside the metal cavity, the upper end of the metal resonant rod is a circular plane, the lower end is a circular plane, and the side surface is a gradually concave structure; the central axis of the metal resonant rod coincides with the central axis of the metal shell; a gap is left between the upper end of the metal resonant rod and the metal cavity to form an open circuit; the lower end of the metal resonant rod is directly connected to the metal cavity to form a short circuit; the size of the filter cavity depends on the specific frequency and Q value requirements.

The invention provides a bismuth-doped optical fiber and a preparation method and application thereof, the bismuth-doped optical fiber realizes C + L full-band positive gain through cooperation of Bi, Ge, La and Y and component proportion optimization: Bi is a core active component to form a BACS to generate near-infrared gain; la and Y improve the BACS concentration, inhibit non-radiation loss and enhance the gain efficiency; and the Ge adjusts the refractive index of the fiber core to guarantee stable optical transmission. According to the optimization, the problem of negative gain of the traditional BDF in the C + L wave band (especially 1524nm) is solved, the noise is reduced, and the practical value of broadband communication is improved.

The invention provides a low-noise single-frequency laser, which comprises a linear resonant cavity for realizing light field local constraint and gain amplification, and is characterized in that the linear resonant cavity comprises a gain optical fiber, an all-dielectric C-waveband narrow-band high-reflection metasurface structure and a miniature BIC high-Q-value metasurface structure; the first end of the gain optical fiber is welded and fixed with the all-dielectric C-waveband narrow-band high-reflection metasurface structure, and the second end of the gain optical fiber is welded and fixed with the miniature BIC high-Q-value metasurface structure; wherein the all-dielectric C-waveband narrow-band high-reflection metasurface structure is used for screening a C-waveband target wavelength through a narrow-band high-reflection characteristic and suppressing a non-target mode at the same time; the miniature BIC high-Q-value metasurface structure realizes a high-Q-value characteristic by suppressing radiation loss, so that the laser line width is efficiently compressed, and noise is suppressed. The low-noise single-frequency laser provided by the invention can finally realize low-noise and narrow-linewidth single-frequency laser output.

[Technical Problem] An optical modulator is provided that can suppress electrode loss at low frequencies below 50 GHz and suppress radiation loss at high frequencies above 50 GHz. [Solution] An optical modulator (1) includes a substrate (2) and at least one interaction portion (MZ) disposed on the substrate (2). The interaction portion (MZ) includes: first and second optical waveguides (10a, 10b) adjacent to each other formed on the substrate (2), and first and second signal electrodes (7a, 7b) disposed opposite the first and second optical waveguides (10a, 10b), respectively. No ground electrode is configured in a region (NZ) near the interaction portion (MZ), and a ground electrode is configured near at least one of an input portion and a terminal portion electrically connected to the first and second signal electrodes (7a, 7b).

The present application provides an energy charge-discharge control method and system based on integrated water-light-storage, which relates to the technical field of charge-discharge control. The method includes: analyzing historical energy application logs in combination with a predetermined unit cycle to generate a historical energy application amount time series; obtaining the target energy demand of a target cycle; introducing a radiation loss correction function to perform loss analysis on solar energy output characteristic information to obtain a loss correction result, and obtaining a predicted energy output amount; determining whether the predicted energy output amount is greater than the target energy demand to obtain a determination result; and reading a predetermined charge-discharge strategy according to the determination result to perform charge-discharge control. By accurately predicting and comparing the predicted energy output amount and the target energy demand, the energy storage device is activated to perform charge-discharge control, ensuring the balance between energy supply and demand and optimizing energy utilization. The effect of activating the energy storage device to perform charge-discharge control according to the actual situation, ensuring the balance between energy supply and demand, and optimizing energy utilization is achieved.

The invention belongs to the technical field of optical microscopic imaging, and discloses a microscopic imaging system and a stimulated radiation loss microscope. The microscopic imaging system comprises an illumination mechanism used for providing a first light beam and a second light beam which are coaxially incident; the phase modulation optical device comprises multiple layers of diffractive optical elements, and the multiple layers of diffractive optical elements are arranged at intervals in the transmission direction of the first light beam and the second light beam and used for conducting phase modulation and convergence on the first light beam and the second light beam in a matched mode. And the first light beam and the second light beam can form a first light spot and a second light spot at the focal plane of the stimulated radiation loss microscope, and the first light spot and the second light spot are in one-to-one correspondence and coincide in center. According to the technical scheme of the invention, the stimulated radiation depletion microscope can be normally matched with a commercial laser which has a large bandwidth and wavelength drift and is used as an excitation beam and a depletion beam.

The invention relates to the technical field of stimulated emission depletion (STED) super-resolution imaging probes, in particular to design synthesis based on curcumin compound molecules containing a beta-dicarbonyl fluorine boron skeleton and a preparation method of a low-power STED nano-particle probe. According to the invention, the curcumin derivative compound with the beta-dicarbonyl fluorine boron skeleton is synthesized, and the constructed host and guest body type TADF nanoparticles realize low-power STED biological imaging. The preparation method of the host-guest doped nanoparticles is simple and economical, and the host-guest doped nanoparticles have high luminance and TADF characteristics. As an STED nano-particle probe, the material has the advantages of high optical stability and low saturation power, so that ultrahigh-resolution imaging is realized.

The application discloses an anti-interface rough scattering quantum cascade laser active region and a preparation method thereof. The application forms a topological interface state protected by chiral symmetry as a lasing upper energy level at the butt joint interface between a first superlattice region and a second superlattice region, the wave function of the topological interface state is strictly zero in the thick barrier center and the interface, thereby the non-radiation loss caused by the interface roughness scattering is inhibited from the root, and the upper energy level carrier lifetime is significantly prolonged. Based on this, the threshold current density of the quantum cascade laser is greatly reduced, and high-efficiency lasing of 10 μm wavelength can be realized at room temperature. Meanwhile, a mixed epitaxy process combining molecular beam epitaxy and metal organic chemical vapor deposition is adopted, the nanometer precision energy band design of the core active region is ensured, and the efficient growth of the thick film waveguide layer is realized, which is beneficial to the practicalization and large-scale preparation of the device.

The invention belongs to the technical field of microwave communication, and particularly discloses a low-loss differential transmission line structure based on a common dielectric layer. According to the invention, the technical means of alternately laminating multiple transmission layers and dielectric layers and arranging through holes for vertical interconnection is adopted, so that an electromagnetic field is distributed in the air above and below the conductor as much as possible, and the side surface of the signal transmission conductor is grooved, so that the dielectric loss of the substrate is directly reduced; signal transmission conductors are connected through high-density metalized through holes, so that signal current can flow in parallel in a plurality of metal layers through the through holes, the equivalent cross sectional area of current circulation is remarkably increased under the high-frequency skin effect, the equivalent resistivity is reduced, and the conductor loss is reduced; meanwhile, the grounding conductors are connected in parallel through the through holes, an electromagnetic field is bound around the signal transmission conductor, and radiation loss and mutual interference are restrained to the maximum extent. Compared with the prior art, the effects of greatly reducing high-frequency loss and improving signal integrity on a common dielectric layer are achieved.

The metasurface resonator comprises a plurality of unit structures arranged periodically, each unit structure comprises a substrate layer and an L-shaped metal column, the L-shaped metal column is arranged at the center of the upper surface of the substrate layer, and the L-shaped metal column is arranged at the center of the upper surface of the substrate layer. The L-shaped metal column is composed of two cuboid metal columns which are perpendicular to each other, and the heights of the two cuboid metal columns which are perpendicular to each other are adjusted through a height scaling factor. By adjusting the height scaling factor of the metasurface resonator, the dissipation characteristic of the resonance mode supported by the metasurface resonator can be controlled, when the height scaling factor is reduced, the local state of the high-loss and low-quality factor supported in the metasurface resonator is evolved into the non-local state of the low-loss and high-quality factor, and the local state of the high-loss and low-quality factor is changed into the non-local state of the low-loss and high-quality factor. And non-local plasmon resonance with smaller radiation loss, narrower line width and higher quality factor is excited. By using the non-local plasmon resonance of the high-quality factor, the GH displacement can be greatly enhanced.

A super-resolution laser direct writing and imaging method and device based on two-photon and stimulated emission depletion effects, the method comprising: adding a photoinitiator to the photoresist, utilizing its two-photon absorption effect and stimulated emission depletion effect to realize two-photon STED high-precision micro-nanostructure laser direct writing; at the same time, utilizing its own fluorescent luminescence characteristics, utilizing its two-photon absorption characteristics and stimulated emission depletion (STED) characteristics, to perform two-photon STED super-resolution microscopic imaging of the written structure. The present invention utilizes the two-photon and STED effects of the initiator to simultaneously realize super-resolution writing and imaging, simplifying the composition of the photoresist. In addition, the same excitation light and loss light can be used in writing and imaging, respectively, so high-precision writing and super-resolution imaging can be realized simultaneously in one optical system, and the system complexity can be effectively simplified by multiplexing the excitation light and loss light optical paths of writing and imaging.

The invention provides a luminous copper halide cluster as well as a preparation method and application thereof. The light-emitting copper halide cluster has visible light emission with high light-emitting efficiency in a film state, the molecular structure of the light-emitting copper halide cluster is high in expansibility, and the light color is easy to regulate and control. Meanwhile, the copper halide cluster is good in machinability, and a membrane can be prepared through a vacuum sublimation method or a solution method. The two problems of the majority of copper halide cluster luminescent materials in the prior art are overcome: (1) the copper halide cluster luminescent materials are poor in processability, difficult to sublimate and low in solubility; and (2) the non-radiation loss of the excited state is serious, resulting in insufficient luminous efficiency of the film.

This invention relates to the field of industrial sand drying and energy optimization control, and particularly to a green production quality control system and method for drying sand. It includes: real-time monitoring and acquisition of sand data and drying environment data; preprocessing the acquired sand data and drying environment data to obtain preprocessed sand data and drying environment data; calculating the heat demand using a heat demand estimation and control algorithm, and dynamically correcting for heat loss; dynamically adjusting the heating power output based on the heat demand using an adaptive nonlinear heating power control algorithm; and calculating the heat recovery efficiency in the exhaust gas in real time at each moment using an instantaneous heat recovery efficiency calculation algorithm based on the heat demand and heating power output. This solves the technical problem that heat loss during the drying process is inevitably caused by conduction, convection, and radiation, and the heat loss decays exponentially over time, affecting drying efficiency and energy consumption.

The present invention provides a transition structure from a radio frequency chip to a substrate integrated waveguide, the transition structure comprising: a substrate integrated waveguide and a radio frequency chip. The substrate integrated waveguide comprises a substrate, a first through hole, a second through hole, and a coupling structure, wherein the second through hole is the grounding end of the substrate integrated waveguide; the coupling structure is located between two rows of first through holes; and the radio frequency chip is located above the coupling structure. During the application of the transition structure, the radio frequency signal of the radio frequency chip enters the substrate integrated waveguide, the coupling structure changes the surface current to excite multi-mode resonance, and couples the radio frequency signal to the substrate integrated waveguide in the form of an electromagnetic wave. Since the second through hole is grounded, the electromagnetic wave is impedance matched through the second through hole during transmission along the arrangement direction of the first through holes. The present invention provides a transition structure with broadband and low loss characteristics through the coordination between the coupling structure, the first through hole, and the second through hole, and does not provide a microstrip line, thereby avoiding radiation loss.