49 results about "Apparent mass" patented technology

In an auto image stabilization system, a driving member formed as a wire of shape memory alloy (SMA) is retained by a projection of an image capturing unit. A distance Lb from the rotation center of an elastic deforming part to center of gravity (point of application) of the image capturing unit is longer than a distance La from the rotation center of the elastic deforming part to the projection (power point). In the configuration, equivalent mass (apparent mass) of the image capturing unit becomes (Lb/La) times, and it causes deterioration in response. Consequently, the driving member having an ellipse-shaped section in which a value obtained by dividing the width in the longer direction of the section by the width in the shorter direction is 1.3 or larger is employed. As a result, heat dissipation of the driving member increases, so that response in the SMA actuator can be properly improved.

The invention belongs to the technical field of engineering structure control, and in particular relates to a stayed cable vibration damper and a design method for an apparent mass rotating electromagnetic damper. The stayed cable vibration damper comprises a damping device and a transmission mechanism, the transmission mechanism is used for connecting the stayed cable and the damping device, the design method comprises the steps that the fundamental frequency of the stayed cable is determined; the installation location of the apparent mass rotating electromagnetic damper is determined; the damping parameters of the apparent mass rotating electromagnetic damper is calculated; and the stiffness parameters of the apparent mass rotating electromagnetic damper is calculated. According to the stayed cable vibration damper and the design method for the apparent mass rotating electromagnetic damper, a ball screw is utilized to effectively improve the rotational speed of the rotating electromagnetic damper, the equivalent damping coefficient of the damper is improved, and the energy consumption efficiency of the electromagnetic damper is improved; and an inertia flywheel mounted on a rotating shaft of the electromagnetic damper generates an apparent mass effect, the apparent mass effect is amplified through a ball screw mechanism, the stayed cable vibration damping mechanism is provided passive negative stiffness control characteristics, and the vibration damping effect of the stayed cable is effectively improved.

Methods and systems for determining fractional regional ventilation are disclosed. A method includes obtaining first and second lung image data indicative of a first phase and a second phase of a respiratory cycle, respectively, determining an apparent mass ratio k based on the first lung image data and the second lung image data, determining first and second spatially matched lung image data, each including N voxels, based on the first lung image data and the second lung image data, and determining at least one fractional regional ventilation value (FRV value), in accordance with a first equation FRV(n)=(k·ρ2_n−ρ1_n)/ρ1_n. The value of n is a voxel index, ρ1_n is indicative of a density of a voxel n of the first spatially matched lung image data, and ρ2_n is indicative of a density of a voxel n of the second spatially matched lung image data.

The invention belongs to the field of metallurgy and relates to a method for preparing sigma-phase FeV50. The technical problem to the solved of the invention is to provide a method for preparing the sigma-phase FeV50 which has good apparent mass and is easy to break. In the adopted technical scheme, the sigma-phase FeV50 is obtained by uniformly mixing vanadium oxide, aluminum, iron and lime serving as raw materials, feeding the mixture into a furnace and smelting the mixture in an electric arc furnace by an electro-aluminothermic process. The method comprises the following steps of: a, adding excess aluminum into the raw materials while proportioning so as to reduce the vanadium oxide, melting a furnace charge down, depleting slag until vanadium content is low and removing lean slag; and b, adding an appropriate amount of vanadium oxide into alloy liquor from which the slag is removed to remove the excess aluminum, discharging and casting when the temperature and aluminum content ofthe alloy liquor meet requirements and cooling so as to obtain a product, namely, the sigma-phase FeV50. The crush strength of the sigma-phase FeV50 produced by the process is less than 510 MPa and convenience can be brought to vanadium iron manufacturers and customers in the crushing, sampling and using processes of vanadium iron.

The invention generates mass scale comparability between mass spectra which are acquired in time-of-flight mass spectrometers, particularly with ionization by matrix-assisted laser desorption. Always slightly distorted mass scales of different mass spectra from the same type of sample can be aligned. The flight times of identical ions always differ slightly from one mass spectrum to the next due to non-reproducible processes in the ionization method. Thus the apparent mass values of ion signals of identical substances in different mass spectra do not match even if the flight times are converted into mass values with the identical calibration equation. After alignment of the mass scales, mass spectra can be reliably compared with respect to deviations in intensities of bio-makers, or be added together without deterioration in the mass resolution, and improved reference spectrum libraries can be created. Furthermore, the invention allows more reliable library searches to be carried out.

The invention relates to an automobile apparent quality detection method based on a generative adversarial network. The method comprises the following steps: acquiring apparent defect image data suchas surface pit packages, scratches, geometric dimension gaps and surface differences of offline vehicles; in consideration of the existence of shelters such as mud points, rain points and oil stains on the surface of the actual defect, performing random binary mask equivalent processing on the acquired defect data to complete an image restoration task based on unsupervised learning; the repaired defect data and the unprocessed defect data are used for training the generative adversarial network, and a defect recognition and classification task based on semi-supervised learning is completed; and optimizing the weight parameters in the generative adversarial network training process by using an interval optimization algorithm. The network structure of the generative adversarial network provided by the invention is used for unsupervised authenticity discrimination to assist in completing an image restoration task. And finally, defect shielding object removal can be carried out simultaneously to complete image restoration and automobile apparent defect identification and classification multitask.

The invention relates to a testing method for cohesion performance of 3D printing building mortar. The method comprises the two steps of preparation of a test specimen and testing of voidage, wherein the testing of voidage comprises the steps of determination of drying quality, dipping of the test specimen, determination of apparent mass of a saturated specimen, quality determination of the saturated specimen, voidage calculation and the like. Compared with the prior art, the method provided by the invention can be used for effectively representing the layer cohesion performance (voidage) of different kinds of printing mortar, i.e., while the voidage is lowered, the compactness is increased, and thus less defects exist between each two adjacent layers. According to the method, the quantitative index to the layer cohesion performance of the 3D printing mortar can be given so as to provide a basis for evaluating the performance of the 3D printing material. By testing the layer cohesion performance of the printing material via the method, the compositions of the material can be blended, so that the requirements on the performance of the printing material in different environments and under different working conditions can be met.

The invention discloses a compound admixture for heat curing-free concrete in winter construction. The compound admixture consists of the following components in parts by mass: 28-40 percent of high performance superplasticizer, 3-10 percent of early strength admixture, 5-15 percent of antifreezing agent, 3-7 percent of plant fiber intermediate-acting water-reducing agent MPA for retaining plastic and controlling the thickening, 0.02-0.5 percent of defoaming agent, 0.02-0.1 percent of PC-II for bleeding air and the balance of water. The compound admixture disclosed by the invention can be used for concrete with the intensity of C35 and over C35, does not need heat curing during winter construction and has the addition amount of 1-2 percent of that of gel material; and the compound admixture has the advantages of enabling the concrete to have upper flow regime, favorable cohesiveness, favorable water-retaining property, favorable slump loss, early strength under low temperature, good apparent mass of concrete and the like. According to the compound admixture, the initial slump flow is over 500mm, the early strength is obviously increased without influencing the development of later strength, the template cycle is prolonged and the curing cost of the concrete is reduced.

A dynamic method to accurately determine the mass of a vehicle which deforms on acceleration and is subject to low frequency noise is disclosed. Only the greater than zero hertz frequencies of the signals are processed. Both signals are squelched during periods of high jerk to reduce the error between true mass and apparent mass. For a single body or combination vehicle such as a semi-rig with a propulsive body of known mass a reference for matched or Wiener filtering is constructed from the noisy signals to filter low frequency noise. A towing vehicle with a fifth wheel mounted on a dedicated load sensing apparatus can, therefore, determine the weight of any semi-trailer towed on any terrain of any inclination and any changing inclination with the greatest precision in the shortest possible time.

The invention discloses a crop straw manmade board and a production method thereof. The production method comprises the steps of (1) cutting straws of which the moisture content is 20%-30% into straw sections of which the length is 10-100 mm; (2) uniformly drying the straw sections by adopting drying equipment, and enabling the moisture content of the straw sections to be reduced to 3%-20%; then removing sundries in the straw sections; (3) pulverizing the straw sections by adopting a pulverizer; (4) screening pulverized fiber into coarse materials and fine materials by adopting screening equipment; (5) taking the coarse materials as raw materials of a core layer and the fine materials as the raw materials of a surface layer, sequentially carrying out sizing, mat formation, pre-pressing, hot pressing and post-processing, and obtaining the crop straw manmade board. According to the crop straw manmade board and the production method, disclosed by the invention, the straws are cut into the straw sections, and feeding, drying and pulverizing are easy; the energy consumption of the pulverizer can be reduced due to dry and clean straw sections, and the production efficiency is substantially increased; meanwhile, the fault rate of the pulverizer is greatly reduced, and continuous and stable production is ensured; the straw yield is increased, the shapes of wood shavings are uniform, and the apparent mass and the physical and chemical performance of a straw board are ensured.

The invention discloses a white laser labeled glass fiber reinforced nylon 6 composite material and a preparation method thereof. The composite material comprises the following components in percentage by weight: 50 to 88 percent of nylon 6 resin, 10 to 45 percent of glass fiber, 0.5 to 10 percent of color development filler, and 0.5 to 5 percent of other additives. The method comprises the following steps: weighing various materials except the glass fiber; mixing the materials in a material mixer for 3 to 5 minutes; adding the evenly mixed material into a double screw extruder, wherein the glass fiber is added from the first air outlet, the temperatures from a feed inlet to an extrusion die head are between 160 and 180 DEG C, between 190 and 220 DEG C, between 210 and 240 DEG C, between 220 and 250 DEG C, and between 210 and 240 DEG C respectively, and the rotating speed of a host machine is between 20 and 50 hertz; and then using a plastic injection molding machine to prepare samples. The composite material has the advantages of good apparent mass, obvious white laser labels, abrasion resistance, durability and easy processing.

The invention discloses a method and a device for improving the quality of continuously cast hollow billets by imposing a compound alternating electromagnetic field, which pertains to the technical field of the preparation of metal materials. The method and the device of the invention are that the outside of a slotted outer crystallizer is provided with electromagnetic coils with medium frequency and high frequency and the liquid surface is kept parallel to the central plane of the coins, with an error not exceeding plus or minus 5mm; meanwhile, a convex magnetic field generator with low and medium frequency is arranged in the cooling water sheath inside an inner crystallizer, which is adjacent to a initially solidified shell. The method and the device of the invention have the advantages that: (1) the surface vibration mark caused by the vibration of crystallizers is settled and the segregation tumors, cracks and other defects on the inner and outer surface of the hollow billets are eliminated, thus having good apparent mass; (2) the solidification structure has good homogenization and fine crystal grain and can be directly rolled in a as-cast state; (3) the placement of the convex magnetic field generator in the inner crystallizer simplifies the design of the magnetic field generator and saves the space of industrialized operations, which is especially beneficial to the production of the large-caliber hollow billets. The method of the invention is applicable to the production of various alloy hollow billets.

The invention provides a vacuum brazing method for a radio fuze antenna radiator. The vacuum brazing method comprises the following steps: 1) preparing a soldering lug by adopting a linear cutting mode; 2) assembling a cavity and a cover plate of the radiator according to requirements; 3) designing a welding process box and a welding tool, putting the assembled radiator into the process box, and then, putting the process box onto the welding tool which is put into a vacuum furnace in advance; 4) carrying out vacuum brazing on the radiator; and 5) carrying out thermal treatment on the brazed radiator. According to the vacuum brazing method, the soldering lug is prepared by adopting the linear cutting mode, so that break-off is avoided, and the time is saved; the soldering lug is fixed by four locating pins on a welding step, and the vacuum welding tool is supplemented, so that the welding defects of uneven welding flux filling, soldering skips and the like are greatly avoided, and the apparent mass is improved; according to the optimized process, a thermal treatment process is independent, thereby shortening the vacuum brazing and cooling time, and greatly improving the vacuum brazing efficiency.

The invention discloses a high-apparent mass blowing micro foaming automotive air duct material and a preparation method thereof. The material disclosed by the invention contains the following components in parts by weight: 60-85 parts of polyethylene, 1-10 parts of a filling agent, 1-10 parts of a hyperdispersant, 5-20 parts of a flexibilizer, 1-10 parts of a foaming agent, 5-15 parts of a blowing promoter, 1-5 parts of a nucleating agent and 0.5-2 parts of other additives. The invention further discloses a preparation method of the high-apparent mass blowing micro foaming automotive air ductmaterial. The material disclosed by the invention has the characteristics that the molded foam is small in particle size, the foam density is high, the inner and outer walls of blowing air duct products have high apparent mass and the like, and wind resistance of the product is reduced; the product has the characteristics of being light in weight, excellent in dimensional stability, short in molding cycle, high in molding yield and the like; and meanwhile, the performance requirements on odor and VOC (Volatile Organic Compounds) in automotive original equipment manufacturers are met.

The invention discloses a vacuum infusion process for forming a composite material and the composite material. The vacuum infusion process comprises the following steps of: injecting raw materials for preparing the composite material for performing mold filling; and defoaming the raw materials before the raw materials are injected into the mold for performing mold filling. According to the process, the air bubbles in the raw materials for preparing the composite material are reduced, so that the porosity in the formed composite material is reduced, and the apparent mass and mechanical properties of the prepared composite material are improved. The method for defoaming the raw materials for preparing the composite material before mold filling is simple and easy to implement.

The invention discloses a displacement frequency response calculation method of a series multi-degree-of-freedom system. The method includes: through modeling of a series multi-degree-of-freedom system, obtaining a series multi-degree-of-freedom system model; establishing a displacement transfer function model; establishing an apparent quality model; establishing an acceleration frequency responsemodel; establishing a displacement frequency response model and obtaining the displacement frequency response. Through apparent mass, the kinematic relationship between adjacent mass points in the system is established. On the premise of not establishing the whole system dynamics model, the displacement transfer function and acceleration transfer function between adjacent mass points are established from back to front and step by step, and the apparent mass of each mass point is obtained. The apparent mass of the first mass point is combined with the boundary condition to obtain the displacement frequency response and acceleration frequency response of the first mass point. The displacement frequency response and acceleration frequency response of all the mass points are obtained by the transfer function between the adjacent mass points.

The invention discloses a visual robot for inspecting the surface texture and apparent quality of textiles. It comprises a base, and a test box is fixedly installed on the top of the base. A baffle is fixedly installed on one side of the box, and the baffle is located at the opening on one side of the through groove, and a chute connecting the through groove is opened on the baffle, and a limit plate is slidably installed inside the chute, and the One side of the limiting plate is fixedly connected with one end of the electric push rod. In the present invention, the community drive box is started by the drive motor in the drive box, and through the cooperation of the driving wheel and the driven wheel, when the drive motor is started, the first rotating shaft and the second rotating shaft will rotate in opposite directions at the same time, when the first rotating shaft When rotating with the second rotating shaft, the textiles will be moved to the inside of the inspection box, and the textiles will be flattened, so as to avoid the inaccurate inspection structure caused by the unevenness of the textiles.

A method to improve apparent mass a film coating includes the steps of: coating, drying and rolling. A humidifying device is arranged on at least one side of a gravure roller in the coating process; the device is composed of a water storage tank, an ultrasonic oscillator, a wind feeding device, a spray pipe and a spray nozzle; and the spray pipe and the gravure roller have a distance of 10-50 mm, and the ligature of the spray pipe axis and the gravure roll axis has an included angle with the horizontal direction of 30 to 60 DEG. The invention solves the problem that temperature rise of the roller surface causes accelerated volatilization of local coating liquid aqueous solution on the roller surface, which further causes solid precipitation; the method plays good wetting effect, avoids the phenomenon of paste roller caused by clogging of precipitated solid on the gravure roller surface groove and mesh, and improves the coating stability and apparent mass of film coating.

The invention provides a hood adopting a longitudinal-transverse reinforced rib structure and adopting an RTM entire shaping technology and a manufacturing method of the hood. According to the hood, carbon fiber textiles are used as a material, the textiles are fixed by adopting a hot melting type fixative, material preparation is performed according to the design of a paved layer, and the textiles are cut; the cut textiles are paved and pasted to a hood mold for preparing preforms, then the preforms are assembled and matched, the RTM entire shaping technology is adopted, under 2-10 bar pressure, resin is poured into the hood mold in which the preforms are paved, finally the resin is solidified and shaped in a curing furnace, and the shaped resin is demolded after solidification so as to obtain the hood with the longitudinal-transverse reinforced rib structure and adopting the RTM entire shaping technology. According to the hood disclosed by the invention, the precision of external dimensions of products can be guaranteed; the continuity of longitudinal and transverse reinforced ribs and a panel is guaranteed through the entire shaping technology method; besides, second cementation shaping is not needed, the apparent mass is better, the dimensions of the products are high in precision, the fiber volume fraction is high, the porosity is low, and the cost of the mold can be reduced through batch production.

The invention discloses a quantitative evaluation method for the apparent mass of fair-faced concrete, which is used for testing a surface pore area ratio of the fair-faced concrete and evaluating theapparent mass of the fair-faced concrete according to the surface pore area ratio, and the quantitative evaluation standard is as follows: the surface pore area ratio is less than or equal to 0.35%;wherein the product is qualified if the content is 0.35%-0.55%; and if not less than 0.55%, the condition is unqualified. The method for testing the surface pore area ratio comprises the following steps: collecting an image of on-site fair-faced concrete by using an unmanned aerial vehicle and processing the fair-faced concrete image ; marking the concrete structure and the pore size; performing gray scale binarization processing on the marked image, and distinguishing pores and concrete on the surface of the image through gray scale difference; measuring and counting the size and quantity ofpores on the surface of the fair-faced concrete through computer software, and calculating the surface pore area ratio of the fair-faced concrete. The apparent mass of the bare concrete is quantitatively evaluated by taking the surface pore area ratio as an evaluation parameter for the first time. The method has the advantages of quantification and high accuracy, and convenience is brought to field engineering.