1149 results about "Light wave" patented technology

The invention relates to the technical field of image processing, and discloses an image correction method and system for binocular diffraction AR intelligent glasses. The method comprises the following steps: calculating a dispersion response parameter of a diffractive optical element in the AR glasses in a visible light wave band; respectively carrying out dispersion distortion detection on the left eye image and the right eye image in the AR glasses to obtain a left eye dispersion distortion feature and a right eye dispersion distortion feature; interpupillary distance change data of a user is obtained, effective aperture offset calculation is carried out on the diffractive optical element, and interpupillary distance compensation parameters are obtained; performing coupling calculation on the left eye dispersion distortion feature, the right eye dispersion distortion feature and the interpupillary distance compensation parameter to obtain a binocular dispersion correction matrix; and performing dispersion compensation on the left eye image and the right eye image to obtain a dispersion correction image, and outputting the dispersion correction image to a display module of the AR glasses. The method can respond to the pupil distance change of the user in real time, automatically adjust dispersion correction parameters, realize accurate and comprehensive dispersion correction, and ensure the stability of dispersion correction performance.

The invention discloses a digital twinborn intelligent travel management system and method, and relates to the technical field of travel interaction, and the method comprises the following steps: building a multi-projection unified phase baseline and energy distribution auditing model, carrying out the nanosecond-level synchronous sampling of the phase difference and brightness change curve of a plurality of projection light waves in a virtual-real superposition region, and carrying out the nanosecond-level synchronous sampling of the phase difference and brightness change curve of the multi-path projection light waves in the virtual-real superposition region; generating a corresponding initial light field energy coupling matrix; and constructing an interference trajectory inversion network based on the initial light field energy coupling matrix, and replaying the light wave superposition sequence by using a time inversion algorithm. According to the invention, accurate monitoring and active regulation and control of light field energy are realized through unifying a phase baseline and energy auditing, interference focusing and brightness mutation are effectively eliminated, and visual stability and immersion experience are improved; and energy self-adaptive balance and dynamic closed-loop control are realized through phase conjugate driving and spectrum inverse diffusion gating, so that safe operation of a light field and soft and stable brightness are ensured, and a comfortable and healthy digital twinborn travel light environment is created.

The invention relates to the technical field of chip preparation, and provides a chip based on an annular photonic crystal and a preparation method thereof. The preparation method comprises the following steps: growing a nucleating layer on a substrate; growing a superlattice structure on one side, away from the substrate, of the nucleating layer; sequentially growing an n-type coating layer, an n-type waveguide layer, a quantum well and a p-type electron blocking layer on one side, deviating from the nucleating layer, of the superlattice structure; etching a plurality of annular cavities on the p-type electron barrier layer to form an annular photonic crystal; growing a p-type extension contact layer on one side, deviating from the quantum well, of the p-type electron blocking layer; and carrying out in-situ annealing treatment. According to the preparation method, the directivity of the photonic band gap can be effectively adjusted, uniform light waves in all directions on the side face can be formed, so that leakage of laser from a non-light-emitting area on the side face is restrained, the light emitting efficiency is improved, the annular photonic crystals are periodically distributed, and the light beam quality is effectively guaranteed.

The invention provides a strip mine area automatic extraction method based on a convolutional neural network and an attention mechanism, and the method comprises the steps: carrying out the data preprocessing, and constructing multispectral data containing a vegetation index and a plurality of wavebands; a strip mining area extraction model is set, a double-branch encoder structure is constructed in the strip mining area extraction model, a main encoder in the double-branch encoder structure inputs the visible light wave band of the remote sensing image to extract geometric and texture features, and an auxiliary encoder fuses the near-infrared wave band and the vegetation index to extract vegetation features; high-level features output by the double-branch encoder are input into a cavity space convolution pooling pyramid module, and multi-scale context information is integrated; constructing a decoder containing a depth supervision mechanism, and setting an attention segmentation head at the tail end of the decoder; and training the strip mining area extraction model by adopting the dynamic weighted mixed loss function, and outputting an automatic extraction result of the strip mining area based on the trained model. According to the invention, rapid and accurate extraction of the strip mine area can be realized.

A semiconductor device inspection method includes: selecting, for a semiconductor device including at least one layer, a target layer on which inspection and measurement are to be performed; selecting a material to fill a hole region formed inside the semiconductor device; conducting a simulation for an optical inspection and a measurement for the semiconductor device; selecting, based on the simulation, a wavelength band of light for the optical inspection and the measurement; and detecting, through the light at the selected wavelength, a lower portion of the semiconductor device and a defect of the semiconductor device. A refractive index of the material filling the inside of the hole region is greater than a refractive index of a molding layer surrounding the outside of the hole region.

The invention provides an electro-optical modulator and a modulation method thereof, the electro-optical modulator comprises a substrate, a buried oxide layer and a lithium niobate waveguide layer are sequentially stacked on the substrate, and the lithium niobate waveguide layer comprises a first optical waveguide and a second optical waveguide; the electrode layer comprises a composite traveling wave electrode and a direct-current electrode, and the direct-current electrode is arranged on one side, in the signal transmission direction, of the composite traveling wave electrode; wherein the composite traveling wave electrode comprises a metal electrode and a polymer electrode, the metal electrode is embedded into the buried oxide layer, the polymer electrode is arranged on the surface of the buried oxide layer, and the composite traveling wave electrode is arranged between the first optical waveguide and the second optical waveguide and arranged on the side faces of the first optical waveguide and the second optical waveguide respectively; wherein the direct current electrode is arranged between the first optical waveguide and the second optical waveguide. The electro-optical modulator is high in electro-optical conversion efficiency, the plasma effect caused by light field coupling is effectively avoided, and the light loss of the device is remarkably reduced.

The invention relates to the field of image recognition, discloses an image recognition method and an image recognition system, and systematically solves the core pain point of traditional document recognition through optical-topology fusion processing and a dynamic resource allocation mechanism. The image recognition method is composed of an acquisition module, a grid module, a phase module, a setting module and a distribution module, pixel brightness is calculated and coded based on document RGB data, and a two-dimensional coding matrix is generated; constructing a geometric correction grid, forming a nonlinear constraint field, and enhancing the anti-deformation capability of the image; generating spiral phase light waves in the constraint field by using a spatial light modulator, and generating a time-varying phase map; determining a local topology index by detecting the number of phase jump times; and extracting the closed boundary region as a character block, and generating an analysis result file. The system breaks through traditional limitation, improves image geometric correction precision, feature extraction sensitivity and boundary judgment accuracy, efficiently completes document analysis, and is suitable for scenes such as document digitization and information retrieval.

The invention discloses a cross-medium wearable audio transmission system and a transmission method thereof, which are suitable for audio communication scenes in an air and water body junction environment such as a natatorium. The system comprises a shore transmitting terminal and an underwater receiving earphone, and adopts a blue-green light wave band as a transmission carrier to realize cross-medium wireless transmission of audio signals. The transmitting terminal comprises an audio preprocessing module, a modulation and driving module and a coarse-fine composite light beam alignment module; the receiving earphone comprises an optical receiving module, a posture sensing and aligning module, a signal processing module and a bone conduction audio output unit. According to the system, through a dynamic attitude compensation and light beam alignment mechanism, the audio transmission rate greater than or equal to 1Mbps in a 10-meter range is realized, the error rate is less than or equal to 1 * 10 <-6 >, and the transmission delay is less than 50ms. The method has the advantages of high communication quality, strong anti-interference capability, good wearable performance and the like, and is suitable for scenes of underwater training, voice guidance, immersive audio playing and the like.

The invention discloses a dynamic tunable zero-level electro-optical wave plate system, a device and a preparation method, and belongs to the technical field of optical devices. The invention provides a dynamic tunable zero-order electro-optical wave plate system, and the system comprises a zero-order electro-optical wave plate device which comprises a wave plate substrate made of an electro-optical crystal of a non-centrosymmetric structure, and an electrode disposed on the wave plate substrate; the output end of the adjustable voltage source is electrically connected with the electrode; wherein the adjustable voltage source is configured to be capable of outputting a half-wave working voltage corresponding to a target working wavelength, so that the zero-order electro-optical wave plate device works at the target working wavelength as a half-wave plate. According to the invention, self-adaptive matching of a single device to a plurality of working wavelengths is realized, the problem that the working wavelength of the device is single due to material dispersion is solved, and meanwhile, the processing difficulty of an ultrathin structure required by a specific wave band is avoided.

The invention relates to a preparation method of a visible and near-infrared dual-band high-transmittance transparent conductive film, which is characterized by comprising the following steps of: (1) preparing an ITO (Indium Tin Oxide) film on a transparent substrate by adopting a magnetron sputtering process, and sputtering and depositing the ITO film with the thickness of 200-1000nm; and (2) placing the substrate on which the ITO film is deposited in a high-temperature furnace for rapid heating heat treatment, and cooling after heat treatment. The preparation method has the advantages that the preparation method is simple, and rapid batch production can be realized in combination with an existing magnetron sputtering system; the average transmittance of the transparent conductive thin film prepared by the method reaches 70%-75.1% at the wave band of 1.1-2.5 microns, the average transmittance of the visible light wave band is not lower than 84%, and the sheet resistance is 20-35 omega / sq.

The invention belongs to the technical field of photovoltaic modules, and relates to a photovoltaic module, a preparation method thereof and a photovoltaic system, and the photovoltaic module comprises a battery piece layer which comprises a plurality of battery pieces which are connected with one another; the back surface of the battery piece layer comprises a coating layer, a grid line, a first adhesive film layer and a first cover plate which are stacked in sequence; a hollow reflective material layer is also arranged between the coating layer and the first adhesive film layer, the average reflectivity of the reflective material layer in a visible light wave band is greater than or equal to 30%, and the coverage area of the reflective material layer in the back surface of the battery piece layer is less than or equal to 70%. The reflective material layer is additionally arranged on the back of the photovoltaic module, so that the double-sided power generation capability is considered while the back color difference is effectively eliminated, and the photovoltaic module is particularly suitable for distributed application scenes.

The invention relates to the technical field of spot-size converters, and discloses a lithium niobate film spot-size converter with an asymmetric trident structure and a preparation method of the lithium niobate film spot-size converter with the asymmetric trident structure. The lithium niobate film waveguide layer is positioned on the insulating layer; the silicon dioxide layer is coated on the lithium niobate film waveguide layer; the silicon nitride waveguide layer is located on the silicon dioxide layer; the silicon nitride waveguide layer comprises a first waveguide part, a second waveguide part and a third waveguide part which are connected in sequence in the direction from the input end to the output end of the lithium niobate film spot size converter, and the first waveguide part, the second waveguide part and the third waveguide part are located on the same plane; in the light wave transmission direction, the transverse size of the second waveguide part is sequentially increased, and the transverse size of the third waveguide part is sequentially reduced; according to the invention, the process preparation difficulty is low, high-efficiency coupling with the coupling efficiency of more than 90% from the silicon nitride waveguide to the lithium niobate waveguide can be realized, and the optical fiber coupling alignment tolerance and overlay tolerance as well as the overall coupling efficiency of the spot size converter are improved.

The invention relates to a wind speed measurement system and method based on a homologous isomorphic light wave wind finding radar, and the system comprises a photo-generated millimeter wave signal source module which employs a first laser and a second laser to carry out beat frequency to generate photo-generated millimeter waves, obtains a local oscillator signal based on the photo-generated millimeter waves, and obtains local oscillator light based on the second laser; the millimeter-wave radar wind measurement transceiving module is used for radiating photo-generated millimeter waves to a target space, receiving echo signals, mixing the echo signals with local oscillation signals and outputting intermediate-frequency signals; the laser radar wind measurement receiving and transmitting module is used for transmitting second laser to a target space, receiving echo light and performing coherent beam combination on the echo light and local oscillation light of the second laser to output an electric signal; the signal processing module receives the intermediate-frequency signals and the electric signals and calculates the comprehensive wind speed based on the intermediate-frequency signals and the electric signals. Compared with the prior art, the invention provides a simplified and more flexible homologous laser-millimeter wave signal generation method, and more accurate and reliable wind measurement can be realized.

The invention relates to the technical field of microscopic optical imaging, and discloses a semiconductor conductive particle detection task-oriented differential interference optical system, which comprises an objective lens group and a differential interference module, the objective lens group comprises a front group, a middle group and a rear group which are arranged in sequence; the front group is used for ensuring a large aperture angle and less introduction of spherical aberration and chromatic aberration, the middle group is used for compensating various aberrations introduced by the front group, and the rear group is used for correcting field curvature; the differential interference module comprises a Nomarski prism, a polarizer and an analyzer which are arranged in sequence; the Nomarski prism is used for splitting and combining the linearly polarized light beams; the polarization analyzer is used for converting linearly polarized light which passes through the Nomarski prism and is orthogonal in polarization direction into linearly polarized light with the same polarization direction; the system further comprises a beam splitter and a barrel lens group. According to the invention, long working distance and large numerical aperture can be realized in the visible light wave band, the light path design is optimized so as to reduce aberration introduction, and the anti-interference capability to weak signals is enhanced.

The invention provides a red light and infrared light-emitting compound based on a boron-nitrogen fused ring and application thereof. The invention provides a boron-nitrogen polycyclic aromatic hydrocarbon material of a fused naphthalene ring, and a specific strong electron withdrawing group is introduced to a boron atom para-position. Compared with a compound disclosed in the prior art, the compound provided by the invention introduces a strong electron withdrawing group to a boron atom para-position of boron-nitrogen polycyclic aromatic hydrocarbon of a fused naphthalene ring, so that the emission spectrum of the material can be subjected to significant red shift (red shift from a yellow light band to a red light band and even an infrared band), and red light and even infrared light emission with high luminous efficiency and a narrow band can be realized. An electroluminescent device prepared from the compound provided by the invention shows relatively high luminescent color purity and relatively excellent luminous efficiency, and can meet the requirements of current enterprise production on high-performance luminescent materials.

The invention discloses a light field display method and system with holography as a representation medium, and the method comprises the following steps: S1, collecting a multi-view image of a target scene, carrying out the coding of the multi-view image, and generating a light field tensor containing space and angle information; s2, mapping the light field tensor in the step S1 into a two-dimensional space phase diagram; s3, converting the two-dimensional space phase diagram in the step S2 into a modulation diagram used for driving a spatial light modulator; and S4, driving the spatial light modulator to perform light wavefront modulation according to the modulation graph in the step S3, and reproducing the image of the target scene through optical diffraction. According to the invention, integration from dynamic scene information acquisition to high-quality three-dimensional image reproduction is realized, a low-redundancy and high-fidelity processing link is realized, and the efficiency and quality of holographic display are greatly improved.

The invention relates to a high-resolution wavefront measurement method and device for a complex light field, electronic equipment and a storage medium, and the method comprises the steps: obtaining an observation image representing the to-be-measured wavefront intensity distribution based on to-be-measured light waves passing through a scattering sheet; obtaining initial complex amplitude space distribution corresponding to the wavefront to be measured based on the observation image; and inputting the initial complex amplitude space distribution and the observation image into a target function, taking the complex amplitude space distribution under the condition that the numerical value of the target function is minimum as the complex amplitude space distribution corresponding to the wavefront to be measured, and performing wavefront inversion by minimizing the target function to obtain the wavefront to be measured. The objective function comprises a data fidelity term, a spatial smoothness constraint term and a spatial spectrum bandwidth constraint term of the wavefront to be measured. And for a complex light field with strong aberration, turbulent flow or high-order singular points, the high-resolution wavefront is quickly reconstructed. Object information recording and imaging can be supported under the defocus condition, and the method is further suitable for application requirements of rapid and high-throughput detection and the like.

The invention relates to the technical field of high polymer materials, in particular to a low-viscosity self-curing polyurethane acrylate composition and a preparation method thereof.The low-viscosity self-curing polyurethane acrylate composition is prepared from, by mass, (a) 50-80 parts of polyurethane acrylate prepolymer; (b) 1-10 parts of functional particles; (c) 10-30 parts of a reactive diluent; (d) 0.1-2 parts of a visible light initiator; (e) 0.1-2 parts of a leveling agent; and (f) 0.1-1 part of a deoxidizing auxiliary agent. According to the invention, light response is expanded to a visible light wave band, natural light can trigger free radical polymerization and disulfide bond oxidative cleavage through component and structural design to realize controllable release of water, the system viscosity of an acrylate group is further reduced to 1500mPa. S or below, and the adhesive property and weather resistance are better after curing.

Polarization BRDF characteristic measuring device and method, belong to optical measurement technical field, the present application is to solve the existing BRDF or polarization BRDF measurement slow, low efficiency problem of measurement.The scheme of the present application: the laser light source at the second focal point emits laser light vertically through the circularly polarized light generating system and the polarizing system, the circularly polarized light generating system converts the laser light emitted by the laser light source into circularly polarized light, the polarizing system quantitatively changes the polarization state of the circularly polarized light to form the measuring incident light, the incident light is transmitted through the transmission light of the half mirror, and is reflected by the ellipsoidal mirror to the surface of the sample to be measured at the first focal point, the reflected light wave of the surface of the sample to be measured is reflected again by the inner surface of the ellipsoidal mirror, and is transmitted to the second focal point direction and is reflected by the half mirror, and the reflected light wave is converged to the third focal point of the measuring system through the polarizing system, the polarizing system is adjusted with the polarizing system, and the polarization BRDF characteristic of the sample to be measured is measured.

Provided is an optical control element capable of arranging an input portion and an output portion of an optical waveguide on the same side of a substrate in which the optical waveguide is formed, and capable of reducing differences in the configuration of each branch waveguide while minimizing optical path differences between branch waveguides. The optical control element has a substrate (1) having an electro-optic effect, an optical waveguide (2) formed in the substrate, and a control electrode that controls an optical wave propagating in the optical waveguide, characterized in that an input portion (incident light (L1)) and an output portion (emitted light (L2)) of the optical waveguide are formed on the same side of the substrate, the optical waveguide has at least one Mach-Zehnder type optical waveguide portion (MZ) having two branch waveguides (21, 22) branched from one optical waveguide and recombining the two branch waveguides to form one optical waveguide, and the branch waveguides have an even number of return portions (A1, A2).

The invention discloses a computing spectrum reconstruction method based on CS-Unet and a spectral imaging system. The calculation spectrum reconstruction method comprises two parts, namely TwIST pre-reconstruction and Unet coupling reconstruction, wherein the TwIST pre-reconstruction is used for preprocessing an initial coding spectrum image to generate a pre-reconstructed spectrum image; and the Unet part couples the pre-reconstructed image and the initial coding spectral image in the spectral dimension and inputs the coupled image and the initial coding spectral image into a network for fine reconstruction, and finally a target space-spectral image is recovered. The imaging system is composed of a spectral image coding module and a CS-Unet reconstruction module, a metasurface spectral modulator applied to the spectral image coding module is composed of 36 silicon-based all-dielectric structures, and rich spectral response is achieved by adjusting the period, the size and the direction angle of three basic C4 symmetric units, namely a round unit, a cross unit and a square unit. According to the method, high-robustness and high-imaging-quality spectrum reconstruction is realized in a visible light wave band (400-700 nm), and the method has relatively high engineering applicability.

The application relates to a data transmission system and a medical imaging device. The data transmission system comprises a stationary part and a rotating part rotatingly coupled in the stationary part, and a first transceiving module and a second transceiving module, the first transceiving module being arranged on the rotating part, and the second transceiving module being located on the rotating axis of the rotating part; the first transceiving module is used for transmitting a first signal to the second transceiving module, and / or receiving a second signal transmitted by the second transceiving module. By using the system, one end of signal transmission is arranged on the rotating part of a rotating scanning gantry of the medical imaging device, and the other end of signal transmission is arranged outside the medical imaging device and on the rotating axis of the scanning gantry of the medical imaging device, a data transmission path between the medical imaging device and an external device is formed in the form of light waves or electromagnetic waves; not only the data transmission distance can be improved, but also the data transmission bandwidth and the data transmission rate can be improved.

The invention relates to a refraction-super hybrid long-focus day and night confocal lens and an image acquisition device, and belongs to the field of optical lenses. The long-focus day and night confocal lens has focus consistency in a visible light band and an infrared band; comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object plane to an image plane along an optical axis; at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens is a metasurface lens, and the other lenses are spherical lenses. By adopting the technical scheme of folding and super mixing, large-target-surface day and night common-focal-length imaging is realized, the use of glued lenses is reduced, the complexity of the system is reduced, the assembly difficulty is reduced, and the risk that a structural member generates stray light is reduced.

The invention relates to the technical field of image recognition, and discloses a concrete prefabricated part surface crack detection method and system based on image recognition, and the method comprises the steps: collecting a double-spectrum image sequence of a concrete prefabricated part in a near-infrared wave band and a visible light wave band; separating a surface texture mask and a subsurface structure gradient map of the precast concrete in the double-spectrum image sequence; according to the non-continuous mutation characteristics of the subsurface structure gradient map, identifying a density abnormal region of the concrete prefabricated member, and extracting a potential crack path of the density abnormal region in combination with the penetration depth difference of the near-infrared band; utilizing the surface texture mask to shield an environment interference area of the potential crack path; and collecting the surface vibration frequency spectrum of the shielded area under simulated vibration excitation. The method can solve the problems that the potential crack path cannot be positioned through the penetration depth difference and the detection coverage range and the precision cannot meet the engineering requirements in the prior art.

To provide a distance measuring device having high resistance to contamination in a path of light or electromagnetic waves for distance measurement, and to provide a distance measuring device capable of maintaining distance measurement accuracy even when an obstacle exists on the path of light or electromagnetic waves for distance measurement.SOLUTION: A light emitting unit that emits emission light, a light receiving unit that receives reflected light reflected by a distance measurement target, and an opening that houses the light emitting unit and the light receiving unit and is provided on an optical path of the emission light, A housing having an opening end portion that is formed along an inner surface of the light transmitting member of the moving body and has a shape along the inner surface of the light transmitting member, and a deflection plate that covers an opening at the opening end portion and includes a deflection unit that deflects emission light, in which the light emission unit emits first emission light in a first direction and emits second emission light in a second direction, the deflector includes a first deflector configured to deflect the first outgoing light, and a first irradiation region irradiated with the first outgoing light deflected by the first deflector and a second irradiation region irradiated with the second outgoing light deflected by the first deflector at least partially overlap each other.SELECTED DRAWING: Figure 1

The invention discloses a bismuth oxyiodide modified oxygen-vacancy-enriched titanium dioxide nanotube array and a preparation method and application thereof, which realize wide-range and efficient light response efficiency: BiOI (forbidden bandwidth is approximately equal to 1.8 eV) is used as an excellent visible-light-driven photocatalyst and forms a semiconductor heterojunction with TNAs after being loaded, the spectral response range of the material is widened to a visible light wave band, and the visible-light-driven visible-light-driven photocatalyst can be used for preparing a visible-light-driven photocatalyst. And the construction of interface oxygen vacancies also improves the transmission efficiency of photon-generated carriers, so that the photocatalytic efficiency and the visible light utilization rate of the material are greatly improved. The material prepared by the invention can be used for a long time after being fixed in a reactor, and after the material is recycled for 20 times, the degradation rate of typical refractory organic matters in single 60 minutes can still be kept above 90%.

Optical transmission property estimation device comprising:a transmission waveform restoration unit configured to restore a transmission signal from a reception signal obtained by receiving an optical signal by a coherent detection system; andan estimation unit configured to estimate an optical power distribution in a transmission line by estimating a nonlinear coefficient in a propagation equation of a light wave by a linear least square method based on the restored transmission signal and the reception signal.

The invention belongs to the technical field of child visual training, and particularly relates to a child visual function training system and method based on ciliary muscle adjustment. The child visual function training system based on ciliary muscle adjustment comprises a collaborative acquisition module and a dynamic training module. The collaborative acquisition module acquires an anterior segment image of an eyeball in real time through a built-in image acquisition unit so as to identify eye features, acquires extraocular muscle pressure deformation data through a built-in pressure acquisition unit, and then associates and analyzes the eye features and the extraocular muscle pressure deformation data through a built-in data fusion unit; a mapping model is established according to the analysis result, the refractive power change of the crystalline lens is calculated, and the calculation result is processed into the ciliary muscle adjustment amount; the dynamic training module determines training parameters in combination with child individual data and historical data acquired by the collaborative acquisition module, and dynamically adjusts training duration and light wave parameters according to the ciliary muscle adjustment amount, thereby solving the problems of poor child training effect and safety risk in the training process.

The invention provides a dry-mixed mortar crack risk early warning method and system. The method comprises the following steps: acquiring reflection spectrum differences of dry-mixed mortar aggregates in ultraviolet and visible light wave bands, and quantifying distribution uniformity difference characteristics of coarse and fine aggregates; dynamically adjusting the intensity of a near-infrared light source of the multi-band imaging device based on the characteristics, and constructing a mortar space thermodynamic diagram; identifying the position of a stress concentration area in the thermodynamic diagram, and constructing a stress mapping network taking aggregate particles as topological nodes and stress transfer strength among particles as topological edges; measuring the stress transfer strength change of the topological edge, and calculating the probability distribution value of the crack initiation position; and comparing the probability value with a preset risk threshold value, and generating an aggregate proportion adjustment instruction. According to the method, millisecond-level visual early warning of the aggregate stress transfer risk is realized, the crack initiation prediction accuracy is improved, and the service life of the structure is prolonged.

An electro-optical semiconductor chip includes a ring-shaped optical waveguide and a bus optical waveguide extending past the ring-shaped optical waveguide, such that an optical coupling region exists therebetween. A doped-silicon non-silicided region is disposed outside of the ring-shaped optical waveguide and within thermal communication with the ring-shaped optical waveguide. An inner contact region is formed of silicided silicon along an inner side of the doped-silicon non-silicided region. An outer contact region is formed of silicided silicon along an outer side of the doped-silicon non-silicided region. A first plurality of electrical contacts electrically contact the inner contact region. A second plurality of electrical contacts electrically contact the outer contact region. A voltage differential between the first and second pluralities of electrical contacts controls an electrical current flow through the doped-silicon non-silicided region to control a temperature of at least a portion of the ring-shaped optical waveguide.