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218results about How to "Improve match" patented technology

Testing method for corrosion and scaling properties of oilfield wastewater

The invention discloses a testing method for corrosion and scaling properties of oilfield wastewater. The testing method comprises the following steps of: (1) testing an electrochemical impedance spectrum of a pipeline material in on-site oilfield wastewater; (2) designing a simulation pipeline, simulating flow-state information in a pipeline model under different flow speeds of a pipeline inlet by utilizing CFD (Computational Fluid Dynamic) software and determining an installation position of an experiment testing piece; (3) mounting the experiment testing piece on a dynamic pipeline and carrying out water circulation to stat a dynamic simulation experiment; measuring the thicknesses of scale layers of the test pieces at the different installation positions under different experiment durations; and (4) carrying out a data integrated analysis step: obtaining a relation between the thickness of each scale layer and each variable so as to obtain the corrosion and scaling properties of the oilfield wastewater. The testing method disclosed by the invention can be used for effectively testing the corrosion property and the scaling property of the oilfield wastewater and can reflect different conditions of each site very well aiming at different water quality and pipeline conditions of each specific water injection oilfield.
Owner:黄雨辰 +1

Detection assembly and measuring arrangement for multigas analyzers

A non-dispersive infrared measuring arrangement for a multigas analyzer is described having a radiation source (10), a measuring chamber (20), a beam splitter (3), at least a first and a second detector unit (21, 22) both with at least two detectors (1a, 1b; 2a, 2b); and optical filters in radiation beam portions ending in said detectors. The detector units receive the reflected beam portions (RR) and the transmitted beam portion (RT). Both the first and second detector units (21, 22) have: at least one measuring detectors (1a, 1b) provided with an optical measurement filter (5a, 5b); and at least one reference detectors (2a, 2b) provided with an optical reference filter (6a, 6b). Alternatively, the first detector unit (21) has at least two measuring detectors (1a, 1b) each provided with an optical measurement filter (5a, 5b), and the second detector unit (22) has at least two reference detectors (2a, 2b) each provided with an optical reference filter (6a, 6b). The first detector in said first detector unit and said second detector in said second detector unit are positioned to constitute a first independent single path analyzer channel (11), and said second detector in said first detector unit and said first detector in said second detector unit are positioned to constitute a second independent single path analyzer channel (12).
Owner:INSTRUMENTARIUM CORP

Non-load-sharing piezoelectric thrust test device

The invention provides a non-load-sharing piezoelectric thrust test device, belongs to the technical field of sensors and measuring and control technology, and particularly relates to the test technology of the pulse thrust of attitude control rocket engine. The test device comprises an outer shell, an inner shell, four piezoelectric quartz sensors, four square press plates, four support rods, an engine installation flange, pre-fastening bolts and connection bolts. Piezoelectric quartz sensors made of four YO cut type quartz chip resemble a diamond shape and are located between the inner shell and the outer shell. Four pre-fastening bolts and square press plates are used for pressing all the piezoelectric quartz sensors tightly. Rocket thrust force generated by fuel ejection is transmitted to the piezoelectric sensors through the installation flange, the four support rods and the inner shell, thus eliminating the load division phenomenon in the traditional piezoelectric test system caused by bolts connection or an elastic ring clamping which are adopted by the piezoelectric quartz sensors for pre-fastening, and enhancing the sensitivity and the dynamic measurement accuracy of the test system. The device has the advantages of having high sensitivity, good frequency response performance, being high in dynamic measurement accuracy, therefore can be adopted for testing the pulse thrust of the attitude control rocket engine.
Owner:YANTAI VOCATIONAL COLLEGE

High-voltage fast recovery diode chip employing gradient field limiting ring and production technology of high-voltage fast recovery diode chip

The invention discloses a high-voltage fast recovery diode chip employing a gradient field limiting ring and a production technology of the high-voltage fast recovery diode chip, and belongs to the field of semiconductor chips. The high-voltage fast recovery diode chip employing the gradient field limiting ring comprises a chip, an N+ cut-off ring, the gradient field limiting ring and a P+ anode, wherein the chip is the fast recovery diode chip; and a chip intercept layer sequentially comprises the chip, the N+ cut-off ring, the gradient field limiting ring and the P+ anode from right to left. The gradient field limiting ring comprises a plurality of field limiting rings of which the widths are gradually reduced from the P+ anode to the N+ cut-off ring; the widths of the field limiting rings are gradually reduced from the P+ anode to the edge of the chip; and the distances between the field limiting rings are gradually increased, so that the targets of linear reduction of a high voltage potential from the P+ anode to the edge of the chip and uniform field distribution are achieved; and the high-voltage fast recovery diode chip has the advantages of uniform field distribution, high breakdown voltage, low switching loss, low leakage current and low reverse power consumption.
Owner:桑德斯微电子器件(南京)有限公司

Heat-insulating film with high ultraviolet barrier property and preparation method thereof

The invention provides a heat-insulating film with high ultraviolet barrier property and a preparation method thereof. A section of the heat-insulating film has a layered structure sequentially including an anti-scratch layer, a base film, an ultraviolet barrier compound layer, a base film, an ultraviolet barrier installation adhesive layer and a release film, wherein the ultraviolet barrier compound layer and the ultraviolet barrier installation adhesive layer are formed by coating an ultraviolet absorption paint, the ultraviolet absorption paint at least comprises an ultraviolet light absorbent, a pressure-sensitive adhesive and a solvent; and the anti-scratch layer is formed by coating a photocuring paint or a photocuring nanometer heat-insulating paint, and the photocuring paint or the photocuring nanometer heat-insulating paint at least comprises photocuring resin and auxiliaries. The prepared heat-insulating film has high-weather-resistant, high-definition and high-ultraviolet barrier properties, the infrared barrier rate is greater than 85%, the haze degree is less than 0.1%, the ultraviolet permeability of the UVA long wave band is less than 1%, and the ultraviolet barrier property has no attenuation after being irradiated for 7 hours under the ultraviolet intensity of 100mw/m<2>.
Owner:SUZHOU GENER NANO TECH

Fixture and positioning mechanism thereof

The invention relates to a fixture and a positioning mechanism thereof. The fixture comprises a base, a first cylinder, a second cylinder, an intake pipe and an exhaust pipe; the positioning mechanism includes a positioning body, a first spring, a first positioning column and a second positioning column; a positioning groove is formed in the positioning body; the first spring coats the first positioning column; when a workpiece is positioned on a positioning plate of the fixture, the other end of the second positioning column is inserted through a positioning hole of the workpiece; and as the diameter of the other end of the second positioning column is gradually decreased in a direction far from the first positioning column, positioning holes with different sizes can be adapted to, the adaptability of the positioning mechanism is improved, and the matchability between the positioning mechanism and the positioning holes is improved. The side wall of the positioning hole of the workpiece is butted against the outer peripheral edge of the second positioning column; and when the pressure is applied to the workpiece by a pressure plate, the pressure is applied to the second positioning column by the workpiece to force the first spring, so that the first spring is compressed, and the distance between the workpiece and the positioning surface of the positioning plate is reduced.
Owner:GUANGDONG EVERWIN PRECISION TECH

Vehicle recommendation method and device, equipment and storage medium

The embodiment of the invention discloses a vehicle recommendation method and device, equipment and a storage medium. The method comprises the steps of obtaining a user feature vector of a current user and determining a vehicle feature vector of a to-be-recommended vehicle; determining a long-term behavior vector of the current user in the first time period and a short-term behavior vector of thecurrent user in the second time period according to the historical interaction information of the current user for the historical recommended vehicle; inputting the user feature vector, the vehicle feature vector, the long-term behavior vector and the short-term behavior vector into a DeepFM model to obtain a behavior prediction score of the interaction behavior of the current user on the to-be-recommended vehicle; and recommending the vehicle to the current user according to the behavior prediction score. According to the technical scheme provided by the embodiment of the invention, the long-term and short-term behavior preferences of the user can be tracked in the use process of the DeepFM model, so that the personalized requirements of the user are met during vehicle recommendation, thematching degree between the vehicle recommendation result and the user is improved, and the user experience is improved.
Owner:上海乐享似锦科技股份有限公司
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