Abstract: A rolling device capable of applying horizontal vibration for metal clad plates includes two symmetrically arranged support frames, an upper roller and a lower roller both of which are provided between the two support frames and parallel to each other, four bearing seats which are fixed with two ends of the upper roller and two ends of the lower roller respectively, and four horizontal vibration apparatuses which are provided outside the four bearing seats respectively for driving the upper roller and the lower roller to horizontally vibrate. Every horizontal vibration apparatus includes an exciting hydraulic cylinder and a damper. One end of the exciting hydraulic cylinder and one end of the damper are fixedly connected with two sides of one of the four bearing seats respectively. Every horizontal vibration apparatus is provided outside one of the four bearing seats.

Abstract: The disclosure relates to a method for measuring parameters of roadway low-position lighting fixtures, comprising: selecting a plurality of sets of low-position lighting fixtures with preset color temperatures and color rendering indexes, or a set of low-position lighting fixtures configurable with multiple pairs of preset color temperature and color rendering index; for each set of the plurality of sets of low-position lighting fixtures or each pair of preset color temperature and color rendering index in the set of low-position lighting fixtures, dynamically recognizing a target under different predetermined luminance levels at different predetermined operating speeds; using obtained samples to fit a relationship model between recognition distance and luminance; and based on the fitted relationship model, determining at least one set of said plurality of sets of low-position lighting fixtures or determining at least one pair of preset color temperature and color rendering index for said set of low-position

Abstract: Provided are a polysaccharide composition and method capable of reducing, whether during pre-wear immersion or during post-wear cleaning, the amount of protein adsorbed on hard contact lenses and orthokeratology lenses. The polysaccharide composition and method reduce the amount of protein adsorbed on hard contact lenses and thereby prevent corneal abrasions and inflammations of the conjunctiva and cornea.

Abstract: Provided is an orthopedic composition, including: a powder composition including calcium sulfate hemihydrate, ?-tricalcium phosphate and hydroxypropyl methylcellulose; and a solvent including glycerol and water. The orthopedic composition exhibits improved washout resistance. A method of manufacturing the orthopedic composition and a bone graft set including the orthopedic composition are further provided.

Abstract: The disclosure discloses a method and system for adjusting user field of view (FoV) in a three-dimensional virtual reality (VR) scene. The method includes: acquiring two consecutive frames of scene pictures during a period of a user experiencing a VR scene by using a VR device; determining a projected scene flow vector on the basis of the two consecutive frames of scene pictures; generating a virtual scene graph of the two consecutive frames of scene pictures; determining a projected scene flow value of the virtual scene graph on the basis of the projected scene flow vector; determining a peripheral vision pixel of the virtual scene graph; calculating a projected scene flow average value of the peripheral vision pixel on the basis of the projected scene flow value of the virtual scene graph; and dynamically adjust a FoV of the user on the basis of the projected scene flow average value.

Abstract: A method for integrally forming a graphene film (GF) of a high specific surface area (SSA) by ultrafast ultraviolet (UV) laser processing, includes: selecting a carbon precursor material, where the carbon precursor material is one selected from the group consisting of a biomass/hydrogel composite and a heavy hydrocarbon compound; adding an activator solution to an inside of the carbon precursor material to obtain a composite with an activator uniformly loaded, and spreading the composite on a flexible substrate to form a carbon precursor material layer; heating and drying the carbon precursor material layer; in-situ processing with an ultrafast UV laser to obtain an activated GF of a high SSA; and cleaning and drying the activated GF. With the method of the present disclosure, a microporous activated GF of a high SSA can be directly processed in-situ on a flexible substrate.

Abstract: The present invention provides a polypeptide tag and its application in the synthesis of pharmaceutical chemicals, the recombinant nitrilase was obtained by connecting a polypeptide tag to the N-terminus of the amino acid sequence of the nitrilase; wherein amino acids at both ends of the polypeptide tag are uncharged glycine G, and the rest are a random combination of any one or more of glycine G, histidine H, glutamic acid E, aspartic acid D, lysine K and arginine R; The activity of the recombinant nitrilase in the preparation of 1-cyanocyclohexyl acetic acid is up to 3034.7 U/g dcw, the polypeptide tag significantly improves the soluble expression of nitrilase, and the whole cell catalyst hydrolyzes 1M substrate with the same concentration 30 minutes faster than the mother enzyme.

Abstract: A method for generating millimeter wave noise with a flat RF (radio frequency) spectrum includes the following steps. A noise optical signal with an optical spectrum in Gaussian shape is output by a first optical emission module. The noise optical signal is transmitted to an optical coupler. n beams of noise optical signals with optical spectra in Gaussian shape is output by a second optical emission module. The noise optical signals is transmitted to the optical coupler. The noise light generated by the first optical emission module and the second optical emission module is coupled to the optical coupler. The coupled optical signals is transmitted to a photodetector. The beat frequency is performed by the photodetector to realize mapping transformation from the optical spectra to the RF spectra. The flat millimeter wave noise is output.

Abstract: The present disclosure relates to an LED vehicle lamp with a frustum base plate. The LED vehicle lamp includes a base plate, a circuit board and a plurality of LED chips. The base plate is a frustum base plate. The frustum base plate is arranged on an axis of the LED vehicle lamp. A width of an upper bottom surface of the frustum base plate is smaller than that of a lower bottom surface of the frustum base plate. An axis of the circuit board is parallel to an axis of the frustum base plate. A width of the circuit board is smaller than that of the upper bottom surface of the frustum base plate. The circuit board is installed on the upper bottom surface of the frustum base plate, and the plurality of LED chips are installed on the circuit board.

Abstract: The present invention belongs to the technical field of wind-induced vibration control study of bridges, and provides a dangling net cloth device for suppressing flutter of a sea-crossing bridge, i.e., a large-area dangling net cloth equipped with multiple balance weights, which is suspended below a girder by ropes and is immersed in water. When wind-induced vibration occurs on a bridge, the device is driven to move in the water, and gravity of the device as well as a huge additional mass force and an additional damping force produced by the water on the net cloth will do negative work on the girder to consume vibration energy of the bridge and effectively suppress large vibration of the bridge. The device adopts lightweight standardized components which are convenient to install, detach, transport, and store, and has the advantages of safety, reliability, economy, and practicality.

Abstract: The present invention belongs to the technical field of computer vision, and provides a video semantic segmentation method based on active learning, comprising an image semantic segmentation module, a data selection module based on the active learning and a label propagation module. The image semantic segmentation module is responsible for segmenting image results and extracting high-level features required by the data selection module; the data selection module selects a data subset with rich information at an image level, and selects pixel blocks to be labeled at a pixel level; and the label propagation module realizes migration from image to video tasks and completes the segmentation result of a video quickly to obtain weakly-supervised data. The present invention can rapidly generate weakly-supervised data sets, reduce the cost of manufacture of the data and optimize the performance of a semantic segmentation network.

Abstract: An oil-gas-water three-phase automatic metering device and method includes a liquid inlet pipe, a pump body, a degassing assembly, a water inlet assembly, first and second liquid storage pipes, a weighing assembly, and a control unit. The liquid inlet pipe, degassing assembly, one end of the first liquid storage pipe and one end of the second liquid storage pipe are connected to four valve ports of a first changeover valve, respectively. The water inlet assembly, one end of the pump body, the other end of the first liquid storage pipe, and the other end of the second liquid storage pipe are connected to four valve ports of a second changeover valve, respectively. The degassing assembly, the water inlet assembly and the other end of the pump body are in communication with the weighing assembly, and the pump body, degassing assembly and weighing assembly are communicatively connected to the control unit.

Abstract: A temperature demodulation method oriented toward a distributed fiber Raman temperature sensing system, the method comprising the following steps: step 1 of constructing a high-precision temperature detection device oriented towards a distributed fiber Raman sensing system; step 2 of performing signal processing with respect to Stokes light and anti-Stokes light at a calibration stage; step 3 of performing signal processing with respect to Stokes light and the anti-Stokes light at a measurement stage; and step 4 of obtaining a high-precision temperature demodulation technique oriented toward the distributed fiber Raman sensor. The method is used to effectively resolve the issue of low temperature measuring accuracy caused by Rayleigh crosstalk in existing distributed fiber Raman temperature measurement systems, and temperature measurement accuracy thereof is expected to fall within ±0.1° C. The method is applicable to distributed fiber Raman temperature measurement systems.

Abstract: A method for removing phosphorus and boron impurities in an industrial silicon melt by secondary refining is provided. According to the present disclosure, inorganic zinc chloride is adopted as an impurity removal medium and is quickly decomposed into zinc and chloride ions at high temperatures; the phosphorus and boron impurities can react with the zinc and chloride ions to yield low-melting and high-melting compounds during contact with a silicon melt, the low-melting compounds volatilize and escape from the industrial silicon melt at the high temperature of the secondary refining. The high-melting compounds are segregated at the grain boundary along with silicon solidification and removed by crushing and pickling, or sink to the very bottom of the silicon melt and are removed by cutting off a deposition layer at a bottom of a silicon ingot after the silicon melt is solidified.

Abstract: A resilient prestress-free steel structure includes the elastic centering beam and two pin-ended box column bases. The elastic centering beam includes two cantilever segment I-shaped steel beams, a middle segment I-shaped steel beam and buckling restrained high strength steel bars. The cantilever segment I-shaped steel beams are fixed to the two pin-ended box column bases, the middle segment I-shaped steel beam is connected between the two cantilever segment I-shaped steel beams, the buckling restrained high strength steel bars are symmetrically arranged. One end of each of the buckling restrained high strength steel bars is firmly connected with the web of each of the cantilever segment I-shaped steel beams, and the other end of each of the buckling restrained high strength steel bars is firmly connected with the web of the middle segment I-shaped steel beam. The resilient prestress-free steel structure is arranged in left and right symmetrical manner.

Abstract: A wing model for static aeroelasticity wind tunnel test belongs to the technical field of aeroelasticity tests. In the wing model, the model steel joint and the spar frame are connected with the composite material skin. The piezometer wing ribs are arranged among the spar frame and the plurality of supporting wing ribs. The embedded piezometer tubes are arranged in the piezometer wing ribs, the lightweight filling foam is arranged among the spar frame and the plurality of supporting wing ribs. An outer surface of a frame segment formed by the lightweight filling foam, the plurality of supporting wing ribs, the piezometer wing ribs and the spar frame is covered with the composite material skin. The frame segment is assembled on the model steel joint to form the wing model for the static aeroelasticity wind tunnel test.

Abstract: A method for removing phosphorus and boron impurities in an industrial silicon melt by secondary refining is provided. According to the present disclosure, inorganic zinc chloride is adopted as an impurity removal medium and is quickly decomposed into zinc and chloride ions at high temperatures; the phosphorus and boron impurities can react with the zinc and chloride ions to yield low-melting and high-melting compounds during contact with a silicon melt, the low-melting compounds volatilize and escape from the industrial silicon melt at the high temperature of the secondary refining. The high-melting compounds are segregated at the grain boundary along with silicon solidification and removed by crushing and pickling, or sink to the very bottom of the silicon melt and are removed by cutting off a deposition layer at a bottom of a silicon ingot after the silicon melt is solidified.

Abstract: The present invention discloses an adaptive damping nonlinear spring-variable damping system and a mobile platform system, with the nonlinear spring-variable damping system applied to the mobile platform. The nonlinear spring-variable damping system is characterized in that the system comprises: an oil cylinder accommodating damping oil; a piston, accommodated in the oil cylinder and movable along the oil cylinder to make the damping oil flow; at least one connecting rod, connected to the piston; at least one spring, whose deformation process is constrained by the connecting rod; and a damping adaptive adjustment device, configured to be able to adaptively change the flow resistance of the damping oil according to the vibration of the mobile platform, so as to control the system damping; wherein, when the mobile platform vibrates, the connecting rod and the spring can subject the piston to a nonlinear spring force.

Abstract: The present invention relates to a distributed energy source system utilizing waste heat deeply. The distributed energy source system utilizing waste heat deeply comprises a primary waste heat recycling module, a membrane distillation type seawater desalination module and a membrane type thermoosmosis power generation module. The distributed energy source system utilizing waste heat deeply provided by the present invention can recycle and deeply utilize waste heat and moisture in flue gas by means of the primary waste heat recycling module, the membrane distillation type seawater desalination module and the membrane type thermoosmosis power generation module to realize functions of seawater desalination and low-temperature power generation, has high energy utilization ratio and improves the waste heat utilization efficiency.

Abstract: A concrete curing agent, a curing coating layer and a preparation method thereof, the concrete curing agent comprises a hardening agent and a hydrophobic agent, the raw materials of the hardening agent comprises the following raw materials in parts by weight: 0.1-10 parts of fluorosilicate salt and 100 parts of water, and the hydrophobic agent comprises the following raw materials in parts by weight: 0.1-10 parts of a base catalyst, 1-10 parts of a silane coupling agent, 0.1-10 parts of hydrogen-containing silicone oil, 5-10 parts of a cross-linking agent, 10-100 parts of silica sol and 100-1000 parts of water. The present invention can significantly improve the strength, hardness and hydrophobicity, impermeability and freeze-thaw resistance of surface of concrete before and after hardening, and effectively improves the service life of concrete structures.