Abstract: The present disclosure discloses an intelligent mapping method for a cloud tenant virtual network based on a reinforcement learning model, where a mapping algorithm is used to combine a resource abstraction model, Blocking Island, with a deep reinforcement learning algorithm, Actor-Critic, reasonably abstract underlying network resources by means of the Blocking Island model, and efficiently represent resource connectivity information of the entire network with an amount of available resources between nodes as a lower bound. The method specifically includes: (1): completing modeling of virtual network embedding; (2): modeling computing resources and bandwidth resources in a physical network; (3): constructing a neural network; and the like. Compared with the prior art, the present disclosure has better performance in average mapping cost, benefit-cost ratio, total benefit value and mapping success rate, further improves mapping accuracy, reduces the average mapping cost, and has a wide application prospect.

Abstract: A device for fabricating a quartz microfluidic chip by a femtosecond pulse cluster. The device includes: a femtosecond pulse cluster laser source configured to output a femtosecond pulse cluster; a beam splitting and interference system, configured to split the femtosecond pulse cluster into a plurality of parts, and to converge split parts to form a femtosecond pulse cluster plasma or a femtosecond pulse cluster plasma grating; a sample system configured to move the electronic displacement platform where a quartz glass is placed to control a position where the parts of the femtosecond pulse cluster are converged on the quartz glass; and a hydrofluoric acid immersion system configured to immerse the quartz glass in a diluent hydrofluoric acid solution to remove an ablated part of the quartz glass to form the quartz microfluidic chip.

Abstract: A hyperspectral imaging method includes: providing time-domain synchronous mid-infrared ultrashort pulse and near-infrared ultrashort pulse as pump light and signal light, respectively; subjecting the signal light to optical time-stretching to broaden a pulse width of the signal light; directing the time-stretched signal light to a target sample to be detected; directing the pump light to a time delayer to adjust the time when the pump light reaches a silicon-based camera; spatially combining the time-stretched signal light from the target sample with the pump light from the time delayer; directing combined light to a silicon-based camera where the signal light is detected through non-degenerate two-photon absorption of the signal light under the action of the pump light to acquire hyperspectral imaging data; and obtaining an image of the target sample based on the hyperspectral imaging data.

Abstract: A method for assessing Safety Of The Intended Functionality of autonomous driving based on DAG block chain is provided. The method is based on DAG block chain technology and fused with system of the intended functionality, realizing safety assessment of the intended functionality. The intended functionality is objectively assessed based on data. The assessment method, in combination with an in-the-loop test, analyzes the current test data, without relying on a large amount of traditional experience to make judgments. Result of credit assessment of the nodes is taken as a result of safety assessment. Each of hardware or components is analyzed in terms of the safety and reliability, and the result of assessment is relatively complete. A device and a computer-readable storage medium are further provided.

Abstract: A glass fiber filter element for visible light photocatalysis and air purification and a method for preparing the same. The glass fiber filter element includes 4 to 7 wt % of nanoparticles including at least one selected from zinc oxide, graphene oxide, titanium oxide, and reduced graphene oxide, 2 to 7 wt % of silver nanowires, 3 to 12 wt % of an adhesive system, and 78 to 91 wt % of a glass fiber mat, based on the total weight of the glass fiber filter element. The glass fiber mat is made of at least two glass fibers with different diameters, and the diameters are in a range of 0.15 to 3.5 ?m. The nanoparticles have a particle size from 1 to 200 nm, and the silver nanowires have a diameter of 15 to 50 nm.

Abstract: The present disclosure discloses a method and apparatus for preparing a femtosecond optical filament interference direct writing volume grating/chirped volume grating. The method is characterized in that optical filaments are formed in glass by using femtosecond pulse laser, and plasma is controlled to quickly scan in the glass and etch a volume grating or chirped volume grating structure by adjusting the focal length of convex lens, laser energy and movement of motor machine. The apparatus includes a femtosecond pulse laser module, a pulse chirp management module, a pulse time domain shaping module, a laser separation and interference module, a glass volume grating processing platform module and a camera online imaging module.

Abstract: Disclosed is ultrafast photographing apparatus based on polarization-time mapping, which can obtain spatiotemporal (x, y, t) information of a dynamic scene by means of single exposure. The apparatus includes an active illumination system, a synchronous control system, a data acquisition system, and a data reconstruction system. Firstly, illumination light is generated by the active illumination system to irradiate on a dynamic scene; the synchronous control system is configured to control the single exposure of a camera; the data acquisition system is configured to acquire a two-dimensional image containing sixteen frames of spatiotemporal aliasing by means of polarization modulation and polarization filtering; and the data reconstruction system is configured to reconstruct the acquired image by using an iterative Tikhonov regularization algorithm, and finally to restore sixteen frames of original dynamic scenes with time series information.

Abstract: It relates to a microporous aluminotitanosilicate crystalline zeolite, method of preparation and applications thereof. It extends to a catalytic hydroxylation, by reaction of a compound of formula (I) with H2O2 in the presence of a catalyst comprising the zeolite.

Abstract: A method for preparing a graphene based composite wave-absorbing material includes: dissolving a water soluble barium salt and a water soluble iron salt into deionized water, respectively; mixing barium salt solution and iron salt solution according to a molar ratio of Ba:Fe of 1:12 to obtain a precursor solution; dispersing a graphene material in deionized water to form a graphene dispersion; adding citric acid, nitric acid and the graphene dispersion into the precursor solution in sequence to form a mixture solution; stirring the mixture solution at a temperature of 50 to 75° C. to obtain a sol; coating and drying aged sol on a substrate to obtain a coating layer; and sintering the coating layer by a laser irradiation.

Abstract: An automatic photocurrent spectrum measurement system based on a Fourier infrared spectrometer, including a light source component, an environment control component, a measuring module, and a control module. The system is configured to evaluate photoelectric performance semiconductor materials or devices under different temperatures, voltage biases or current biases.

Abstract: Disclosed is an automatic generation method of a fine-labeled digital pathological data set based on hyperspectral imaging, comprising following steps: obtaining reference histological stained slides and double-stained slides based on pathological samples; obtaining two-dimensional color reference whole slide images based on the reference histological stained slides, and obtaining double-stained hyperspectral images based on the double-stained slides; establishing virtual staining models based on the two-dimensional color reference whole slide images and the double-stained hyperspectral images; establishing a segmentation model for automatically generating labeling information based on the double-stained hyperspectral images; and obtaining the fine-labeled digital pathological data set based on the double-stained hyperspectral images and the virtual staining models, the double-stained hyperspectral images and the segmentation model.

Abstract: Provided is a method for preparing a graphene material from an industrial hemp material by laser induction, which uses a skin, a stem and/or a root of industrial hemp as a carbon precursor-containing material and reduce the carbon precursor-containing material into graphene by laser induction, so as to prepare graphene, graphene quantum dots, a graphene mesoporous material and a graphene composite material.

Abstract: Disclosed in the present invention are a functionalized fluoroalkyl silane compound and a synthetic method therefor. The method comprises: dissolving a halosilane and a fluoroalkyl source in an organic solvent; and synthesizing functionalized fluoroalkyl silane under the effect of an alkali or a tertiary phosphine compound. The functionalized fluoroalkyl silane can not only be used for constructing a series of high added-value compounds such as fluoroalkyl substituted alcohols, ketones and amines that can be constructed by conventional TMSRf, but also can transfer, by means of appropriate conversion, a functional group on a silicon protecting group to the obtained addition product in an addition reaction, for synthesizing some fluorine-containing compounds that cannot be synthesized by using a conventional TMSRf reagent, thereby greatly improving the synthesis efficiency and the atom economy of reactions.

Abstract: Provided are a time and frequency control method and system for optical comb. The method includes: controlling an optical comb measuring system to start and to generate an optical comb; obtaining monitoring data, wherein the monitoring data comprises a working temperature, a mode-locked frequency and a light pump power, wherein the mode-locked frequency comprises a repetition frequency and a carrier envelope phase locked at the end of starting the optical comb measuring system; determining whether an offset of the mode-locked frequency exceeds a self-feedback adjustment range of a hardware adjustment circuit; and in response to any of the repetition frequency and the carrier envelope phase exceeds the self-feedback adjustment range, adjusting the working temperature and the light pump power until the mode-locked frequency returns back into the self-feedback adjustment range.

Abstract: Provided is a system for measuring gas temperature and component concentrations in a combustion field based on optical comb. The system includes two pulse laser devices, two continuous laser devices, a beam splitting device, a measurement path, an interference signal detecting device, an optical processing and electrical processing device and a signal acquisition and analysis device. The measurement path refers to the combustion field to be measured. The interference signal detecting device outputs an interference signal. The optical processing and electrical processing device includes several optic elements and electrical elements, and outputs an adaptive compensation signal and an asynchronous sampling clock signal after a series of processing on output of the two pulse laser devices and two continuous laser devices. The signal acquisition and analysis device outputs the measurement result based on the adaptive compensation signal, the asynchronous sampling clock signal and a stable interference signal.

Abstract: The present disclosure provides a stealth dicing method and apparatus. With the method, the focusing element focuses the laser beam on the surface of material to be diced, and the dynamic-equilibrium plasma channel is formed in the material to be diced by means of self-focusing and defocusing effect of plasma generated by ionizing the material to be diced. The modified layer may be formed in the material to be diced throughout the plasma channel, so as to realize stealth dicing.

Abstract: The present disclosure relates to a gain optical fiber heat-dissipating device for high power ultra-fast laser, including a gain optical fiber and a heat-dissipating structure. The heat-dissipating structure includes a metal tube, a flexible heat-conducting layer and a water-cooling structure. The gain optical fiber is passed through the metal tube, and the flexible heat-conducting layer is provided between the metal tube and the gain optical fiber. The water-cooling structure is provided on the metal tube to reduce temperature of the gain optical fiber. The gain optical fiber heat-dissipating device according to the present disclosure can dissipate the heat through a water-cooling mode, and realize rapid heat dissipation, thus improving heat-dissipating efficiency.

Abstract: The present invention discloses a method of species identification and quality detection of liquid-like samples based on nuclear magnetic resonance technology. In this invention, a two-dimensional relaxation signal containing the 1H T1 and T2 relaxation properties of liquid-like samples is obtained by applying a specially designed composite pulse sequence to liquid-like samples, and a fingerprint spectrum from this signal is established. The fingerprint spectrum can be associated with the essential characteristics of the tested sample, thus can be used to distinguish a specific liquid-like sample from the others. The fingerprint spectrum can be easily converted into a digital form, which is not only suitable for constructing big data of fingerprint spectrum for liquid-like samples, but also can be used for quality detection and authenticity judgment of liquid-like samples based on artificial intelligence.

Abstract: A silicon nitride phased array chip based on a suspended waveguide structure, which includes a silicon nitride waveguide area and a suspended waveguide area. The silicon nitride waveguide area includes a silicon substrate, a silicon dioxide buffer layer, a silicon dioxide cladding layer and a silicon nitride waveguide-based core layer. The silicon nitride waveguide-based core layer includes an optical splitter unit, a first curved waveguide, a thermo-optic phase shifter and a spot-size converter. The suspended waveguide area includes a second curved waveguide and an array grating antenna.

Abstract: A single-mode micro-laser based on a single whispering gallery mode optical microcavity and a preparation method thereof described includes: preparing a desired single whispering gallery mode optical microcavity doped with rare earth ions or containing a gain material such as quantum dots, wherein an optical microcavity configuration include a micro-disk cavity, a ring-shaped microcavity, and a racetrack-shaped microcavity; a material type include lithium niobate, silicon dioxide, silicon nitride, etc.; preparing an optical fiber cone or an optical waveguide of a required size which can excite high-order modes of the optical microcavity, such as a ridge waveguide and a circular waveguides; and coupling, integrating, and packaging the optical fiber cone or the optical waveguide with the microcavity. A pump light is coupled to the optical fiber cone or the optical waveguide to excite a compound mode with a polygonal configuration.