Abstract: A method for preparing a ?-amino phosphonic acid derivative includes: dissolving N-(arylvinyl)benzamide, dialkyl phosphite, manganese acetate, and potassium carbonate in a solvent and reacting at room temperature to obtain (2-benzamido-1-arylvinyl)dialkyl-phosphonate derivative; and hydrolyzing (2-benzamido-1-arylethyl)dialkylphosphonate derivative to obtain ?-amino phosphonic acid derivative. The N-(arylvinyl)benzamide derivative is used as starting material. The raw materials are easy to obtain and are of many different types. A method of preparing ?-aminophosphonic acid derivative includes: dissolving N-(arylvinyl)benzamide, dialkyl phosphite, manganese acetate and potassium carbonate in a solvent, reacting at room temperature to obtain (2-benzamide-1-arylvinyl) dialkyl phosphonate derivative, and then reducing and hydrolyzing the compound to obtain ?-aminophosphonic acid derivative.

Abstract: The present invention discloses a carbon cloth material coated with iodine-doped bismuthyl carbonate, a preparation method thereof, and application in oil-water separation. The preparation method comprises the following steps: immersing preprocessed carbon cloth in iodine-doped bismuthyl carbonate precursor solution, and carrying out hydrothermal reaction to obtain the carbon cloth material coated with iodine-doped bismuthyl carbonate, wherein the iodine-doped bismuthyl carbonate precursor solution comprises bismuth citrate, sodium carbonate, sodium iodide and ethylene glycol. Through a hydrothermal method, the carbon cloth coated with iodine-doped bismuthyl carbonate is synthesized in one step, and the carbon cloth material has a function of emulsion separation. The material has the advantages of simple preparation, abundant raw material, good separation effect and good application prospect on the aspects of industrial sewage treatment and emulsion separation.

Abstract: A long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick belongs to the field of steelmaking technologies using powder-bottom-injecting converters. According to equipment characteristics, process characteristics, and erosion characteristics of the powder-bottom-injecting converter, the design, arrangement, installation, use, maintenance, and replacement of the bottom purging/powder injection bricks are systematically optimized and improved, a technology of automatically detecting the erosion height of bottom purging bricks is adopted, and hot replacement of bottom purging/powder injection bricks and hot replacement of the converter furnace bottom are used collaboratively, which not only can prolong the service life of a single bottom purging/powder injection brick, but also can greatly prolong the overall life of the powder-bottom-injecting converter from 1000-3000 heats in the prior art to 6000-10000 heats.

Abstract: The present invention discloses a method for preparing an ultra-thin Ni—Fe-MOF nanosheet, which comprises the steps of dissolving an organic ligand in an organic solvent, dripping the resulting solution to an aqueous solution containing a nickel salt and an iron salt, mixing uniformly and reacting at 140-160° C. for 3-6 h to obtain the ultra-thin Ni—Fe-MOF nanosheet, wherein the organic ligand is terephthalic acid and/or disodium terephthalate, and the organic solvent is N,N-dimethylacetamide and/or N,N-dimethylformamide. The present invention discloses an ultra-thin Ni—Fe-MOF nanosheet, and use thereof. The preparation method does not require a surfactant, the surface of the product is neat and easy to be cleaned, and the large-scale synthesis of 2D ultra-thin MOF materials can be realized.

Abstract: The invention discloses a visible light responsive titanium dioxide nanowire/metal organic skeleton/carbon nanofiber membrane and preparation method and application thereof. A CNF (Carbon Nano Fiber)/TiO2 nano-wire/MIL-100 (represented as CTWM) membrane material is prepared and an MIL-100 material is used for adsorbing waste gas to enhance the photocatalytic effect of titanium dioxide on the membrane material; a CNF/TiO2/MIL-100 membrane catalyst sufficiently utilizes the adsorption capability of MIL-100 on the waste gas, the photocatalytic degradation performance of the TiO2 and high electrical conductivity of CNF to effectively prolong the service life of photoelectrons and promote the photocatalytic activity of the photoelectrons.

Abstract: The present invention provides an energy consumption optimization method and system for a radio access spectrum-flexible optical network. The method includes: acquiring a set of traffic demands; obtaining the minimum number of occupied remote radio heads (RRH) and the minimum number of occupied baseband unit (BBU) ports of the traffic demands based on a traffic grooming algorithm; and solving an objective function based on the constraints of the objective function of traffic grooming energy consumption optimization, to implement transmission for the traffic demands.

Abstract: The invention discloses an aramid fiber electrode and a preparation method thereof. Silver nanoparticles, carbon nanotubes and polypyrrole were sequentially coated on the surface of the aramid fiber by chemical bonding, to prepare an aramid fiber electrode, two aramid fiber electrodes were wound with an electrolyte to obtain an aramid fiber electrochemical capacitor. Compared with the polymer fiber electrochemical capacitor prepared in the prior art, the aramid fiber electrochemical capacitor provided by the present invention has both high specific capacitance, high energy density, high mechanical performance, high stability, good flexibility and wearability. And other characteristics; the preparation method is controllable and suitable for large-scale applications.

Abstract: The present invention provides a protection method and system in flexible bandwidth optical networks with multi-core fiber. The method includes steps of: selecting an appropriate working path for a connection request, and selecting a working core as a transmission channel on the working path; allocating, on the selected working path and working core, a spectrum resource that satisfies spectral continuity, spectral consistency, and a crosstalk threshold constraint; selecting, for the connection request, a dedicated protection path that does not intersect a link of the working path, and selecting a protection core as a transmission channel on the protection path; and finally, allocating, on the selected protection path and protection core, the spectrum resource that satisfies the spectral continuity, the spectral consistency, and the crosstalk threshold constraint.

Abstract: A method for characterization of respiratory characteristics based on a voxel model includes: successively capturing multiple frames of depth image of a thoracoabdominal surface of human body and modelling the multiple frames of depth image in 3D to obtain multiple frames of voxel model in time series; traversing voxel units of the multiple frames of voxel model and extracting a volumetric characteristic and areal characteristic of the multiple frames of voxel model; acquiring a minimum common voxel bounding box of the multiple frames of voxel model; describing spatial distribution of the multiple frames of voxel model in the form of probability and arranging the probabilities of the minimum voxel bounding boxes of individual frames of voxel model to construct a sample space of super-high dimensional vectors; reducing the dimensions of the sample space to obtain intrinsic parameters; obtaining a characteristic variable capable of characterizing the voxel model.

Abstract: A platinum sulfide protein nanoparticle having near-infrared photothermal effect and multi-modal imaging function, a preparation method therefor and an application thereof. The platinum sulfide nanoparticle having near-infrared photothermal effect and multi-modal imaging function is prepared in aqueous phase by means of formulation screening and process limitation. The nanoparticle has an ultra-small particle size and good stability as well as tumor targeting and photothermal effects and integrates functions of near-infrared imaging, CT imaging, and thermal imaging, so as to achieve high sensitivity, high resolution, and precise positioning of tumors, and to produce high-efficiency photothermal effects under the excitation of near-infrared light to kill tumor cells by thermal ablation, thereby achieving the purpose of efficient, safe, visual, and accurate treatment of tumors. The nanoparticle has the potential for further development and clinical application.

Abstract: The invention discloses a method for measuring a complex degree of coherence of a random optical field by using a mutual intensity-intensity correlation, including the steps of: building a test optical path; rotating a quarter-wave plate to enable the fast axis of the quarter-wave plate to be consistent with a polarization direction of reference light, to obtain light intensity distribution information of a first combined light; rotating the quarter-wave plate to enable the slow axis of the quarter-wave plate to be consistent with the polarization direction of the reference light, to obtain light intensity distribution information of a second combined light; blocking the reference light to obtain light intensity distribution information of to-be-tested light; blocking the to-be-tested light to obtain light intensity distribution information of the reference light; and calculating the amplitude and phase of a complex degree of coherence of the to-be-tested light.

Abstract: A joint locking mechanism of a passive robotic arm includes: an output assembly, including a joint output shaft, and a friction disk fixed to the joint output shaft; a braking assembly, including a threaded shaft arranged coaxially with the joint output shaft, a threaded sleeve threaded to the threaded shaft, a rotary disk connected fixedly to the threaded shaft, an end cap rotatable relative to the rotary disk, and a scroll spring generating a rotational force on the threaded shaft. The scroll spring has one end connected fixedly to the end cap and the other end connected to the rotary disk or the threaded shaft. The threaded sleeve is abutted tightly against the friction disk.

Abstract: The present invention relates to a fluorine-containing alternating copolymer macromonomer and a synthesis method thereof. The synthesis method comprises steps of: subjecting a fluorine-containing alternating copolymer to a reduction reaction at 60-100° C. in an organic solvent in the presence of a reducing agent and a first catalyst to obtain a reduction product; in the presence of a second catalyst, reacting the reduction product with a mercapto-monohydric alcohol in an organic solvent at 60-100° C., to obtain a hydroxyl-terminated fluorine-containing alternating copolymer; and in the presence of a third catalyst, reacting the hydroxyl-terminated fluorine-containing alternating copolymer with an acrylic monomer or acryloyl chloride monomer at 0-30° C., to obtain the fluorine-containing alternating copolymer macromonomer. In the present invention, a fluorine-containing alternating copolymer macromonomer is initially synthesized from a fluorine-containing alternating copolymer through polymer modification.

Abstract: The invention belongs to the technical field of natural medicinal chemistry and quality control thereof, and relates to a method for determining the weight average molecular weight and the purity of a soluble salt of an acidic saccharide. The method comprises using metal ion content in the soluble salt of an acidic saccharide to correct the weight average molecular weight and the content of the of acid saccharide obtained by the combined use of the molecular sieve chromatography and a multi-angle laser scattering detector SEC-MALS. The method of the present invention can be used to more quickly and accurately determine the weight average molecular weight and content of acidic saccharide soluble salts.

Abstract: The present invention discloses a method for preparing a cyclopenta[c]chromene compound. A cationic rare earth compound [Ln(CH)3CN)9]3+[(AlCl4)3]3?.CH3CN is used as a catalyst, and p-methyl thiophenol is used as an accelerator for a catalytic reaction of a chalcone compound so as to prepare a product; and Ln, contained in the catalyst, represents a positive trivalent rare earth metal ion and is selected from one of La, Nd, Sm, Gd and Yb. According to the method, the starting materials are easy to obtain, the reaction process is simple, the catalyst usage is low, the catalyst is universally applicable to various substituted 2-hydroxy chalcones, and the obtained cyclopenta[c]chromene compound has not been reported. The catalyst synthesis method is simple and easy to obtain, and the yield of the target product is high.

Abstract: A heterojunction composite material consisting of one-dimensional In2O3 hollow nanotube and two-dimensional ZnFe2O4 nanosheets and its application are disclosed. When using this material for catalytic reactions, the hollow cavity and two-dimensional nanosheets of hollow nanomaterials can not only reduce the migration distance to accelerate the electron-hole separation, but also provide a large surface area and rich active sites to promote pollution adsorption and surface catalysis. At the same time, multiple light scattering or reflection in the hollow cavity of the hollow nanomaterials can increase light absorption and utilization. In addition, the heterojunction photocatalyst constructed by growing two-dimensional semiconductor nanosheets on a tubular substrate can promote the effective separation of photogenerated electrons and photogenerated holes, thereby improving the catalytic efficiency.

Abstract: The present invention provides a magnetic Fe2O3 nanosphere with PNH surface modification and application thereof in water treatment. First, 2,2-bipyridyl-5,5?-dicarboxylic acid is reacted with thionyl chloride to obtain 2,2-bipyridyl-5,5?-diacid chloride; then 2,2-bipyridyl-5,5?-diacid chloride and 1,4,8,11-tetraazacyclotetradecane react in the presence of triethylamine to obtain a polynitrogen heterocyclic polymer; the polynitrogen heterocyclic polymer is added into an aqueous solution with iron salt to obtain a magnetic Fe2O3 nanosphere with PNH surface modification which has strong light absorption ability, which improves its ability to catalyze in degradation of tetracycline under visible light, so that the pollutants are removed from water.

Abstract: Visible-light response hybrid aerogel and a preparation method and application thereof in waste gas processing are disclosed. Dicyandiamide is taken as a precursor and is calcined in two times to prepare a carbon nitride nanosheet; the carbon nitride nanosheet is dispersed in water, silver metavanadate quantum dots are subjected to in-situ growth to prepare a silver metavanadate quantum dot/carbon nitride nanosheet composite material; the silver metavanadate quantum dot/carbon nitride nanosheet composite material and graphene oxide carry out hydrothermal reaction, and are then frozen and dried to prepare silver metavanadate quantum dot/carbon nitride nanosheet/graphene hybrid aerogel which is the visible-light response hybrid aerogel. The problems of large reduction dosage, serious secondary pollution, complexity in operation and the like generated when waste gas is processed by a traditional flue gas denitration technology are overcome.

Abstract: The present disclosure discloses a real-time micro/nano optical field generation and manipulation system and method. The system comprises a light source, a spatial filtering unit, an optical 4F system and a light wave manipulation unit, and the optical 4F system comprises a first lens (set) and a second lens (set) sequentially arranged along a light path. The present disclosure achieves real-time modulation on an incident wavefront through a phase element or a phase element assemble. By dynamically manipulating an incident light sub-wavefront, or the light wave modulation optical element, or different areas of the optical element, or different parts of the optical field in an imaging plane and/or the like by the spatial filtering unit, real time light fields with different parameters are generated in the image plane of the system.

Abstract: Provided is a bolt screening machine, including an external frame, a feeding mechanism, and a screening mechanism, wherein the feeding mechanism and the screening mechanism are combined with and mounted on the external frame, the unscreened bolts are fed into the screening mechanism through the feeding mechanism, and the screening mechanism screens and arranges the bolts.