36results about How to "Applicable method" patented technology

The invention relates to an alternating current electric transmission line lightning flashover restriction method and device. The method includes the steps of current steering, voltage limiting and arc blowing-out. The current steering includes the steps of providing a current discharge channel for power frequency short-circuit current through a parallel gap, wherein the parallel gap is mounted on both ends of an insulator, the breakdown strength of the parallel gap is lower than that of the insulator, and lightning current flows through the parallel gap rather than passing through the insulator when the parallel gap is broken down by lightning. The voltage limiting includes the steps of connecting a non-linear energy absorbing assembly in series with the parallel gap and limiting over-voltage at both ends of the insulator to prevent the insulator from being damaged by lightning flashover, wherein the non-linear energy absorbing assembly is used for absorbing lightning current energy on the basis of current steering. The arc blowing-out includes the steps of treating continuous combustion caused by arc produced in the parallel gap when the power frequency short-circuit current continues to flow through the parallel gap after lightning current passes to prevent tripping of a circuit breaker. The alternating current electric transmission line lightning flashover restriction device is composed of the parallel gap, electrodes, the non-linear energy absorbing assembly and a special-shaped connecting unit which are assembled and connected with one another and is simple in structure, light in weight and small in size.

The invention relates to a method for preparing high-purity salvianic acid A sodium. The method comprises the following steps: micronization of radix salviae miltiorrhizae, sopping extraction of ethyl acetate, sopping extraction of dregs, adsorption of extracting solution by AB-8 resin, elution, eluent concentration to adjust the pH value to 7-8, heating for 30 min at high temperature of 110-130 DEG C, filtering, adjusting the pH value to 1-3 for the filter liquor, standing, precipitation, filtering, adsorption of filter liquor under the AB-8 resin acidic condition, pure water elution, adjusting the pH value to 7-8 for the eluent, concentration, drying, obtaining salvianic acid A sodium solid and methanol recrystallization to obtain the high-purity salvianic acid A sodium.

The present invention relates to an energy efficiency evaluation method for high energy-consuming enterprises, comprising the following steps: S1) collecting data and establishing an energy efficiency evaluation index system, which includes a plurality of first-level indicators, and each first-level indicator includes a plurality of second-level indicators. Each second-level index is normalized; S2) Based on the energy efficiency evaluation index system, determine the factor domain and comment level domain of the first-level index and the second-level index in turn, and determine the weight set of the first-level index and the second-level index , obtain a comprehensive evaluation matrix, and establish a mathematical model of multi-level fuzzy comprehensive evaluation; S3) use the mathematical model of multi-level fuzzy comprehensive evaluation to complete the energy efficiency evaluation of high energy-consuming enterprises, and analyze the results. The present invention retains all the information of evaluation indicators at all levels, and through multi-level evaluation and subjective and objective comprehensive weighting, it effectively overcomes the industry limitations of a single evaluation method and the subjective randomness of traditional fuzzy comprehensive evaluation, and the calculation method is scientific, Fast, high reliability, strong engineering practicality and application promotion value.

The invention discloses a cross section curve reconstruction method for three-dimensional model reconstruction, which comprises the steps of carrying out segmentation on data points according to curvature information of discrete data, determining corresponding characteristics, and determining an area in which an ideal segmentation point is located; referring to the density of data sampling, determining a reasonable grid division spacing, and carrying out gridding on a target area; firstly fitting a straight line as for each node of the current grid, then fitting a B spline curve based on boundary constraint conditions, and calculating the total error of all data points to the curve and the number of control vertexes of the B spline curve; comprehensively analyzing the two groups of calculated data, and determining a current optimal segmentation point; outputting the optimal segmentation point if the density of the current grid node satisfies the precision; and otherwise, reducing the target area by taking the current optimal segmentation point as a center, reducing the spacing, dividing the grid, and reconstructing a cross section curve according to the current optimal segmentation point.

The invention belongs to the field of engineering machinery, and particularly relates to an anti-rollover system and method for a lorry-mounted crane. The anti-rollover system comprises a support legstate monitoring system, an axle state monitoring system, an anti-rollover controller and a support leg hydraulic cylinder telescopic control valve, and is characterized in that pressure information detected by front side support leg pressure sensors and rear side support leg pressure sensors is transmitted to the support leg state monitoring system; displacement information detected by front axledisplacement sensors and rear axle displacement sensors is transmitted to the axle state monitoring system; the support leg state monitoring system and the axle state monitoring system separately transmit the pressure information and the displacement information to the anti-rollover controller; and the anti-rollover controller performs data treatment and drives the support leg hydraulic cylindertelescopic control valve to drive oil cylinders corresponding to different vertical support legs, so that stress states of the different vertical support legs and lorry posture are adjusted. By adopting the anti-rollover system and method, initiative anti-rollover of the lorry-mounted crane can be realized automatically and safely.

The invention relates to a preparation method of a 1,4-di-[4-(glucosyloxy) benzyl]-2-isobutyl malate comparison product. The method comprises the following steps of: pulverizing a rhizoma bletillae medicinal material into coarse powder, extracting in alcohol and recovering the alcohol; adding water to an obtained concentrated solution to dilute and enriching through a macroporous adsorption resincolumn; hydrolyzing and adsorbing in alcohol, and recovering the alcohol to obtain a concentrated solution; adding silica gel to the concentrated solution and uniformly mixing; drying to form powder and eluting by using chloroform and methanol to obtain a crude 1,4-di-[4-(glucosyloxy) benzyl]-2-isobutyl malate product; carrying out gel column chromatography to obtain a fine 1,4-di-[4-(glucosyloxy) benzyl]-2-isobutyl malate product; and then carrying out preparative reverse silica gel column chromatography and methanol-water elution to obtain the 1,4-di-[4-(glucosyloxy) benzyl]-2-isobutyl malate comparison product. Detected by using a high efficiency liquid chromatography method, the content of the 1,4-di-[4-(glucosyloxy) benzyl]-2-isobutyl malate can reach higher than 98 percent. The method has lower cost, simple step and strong specificity.

The invention discloses a factory-like rapid propagation method for test-tube seedlings of dendranthema morifolium. The method comprises the following steps: by taking a flower bud of dendranthema morifolium as an explant, inducing dedifferentiation and redifferentiation; obtaining the test-tube seedlings through a tissue culture technique; carrying out transitional planting in a vermiculite matrix or a matrix with a ratio of peat to vermiculite to perlite being 33% to 33% to 33% to obtain a shoot with 3-5 leaves and height of 15-20cm after about 30 days; and transplanting to a land for growing field crops, thus harvesting in the current year. By adopting the technical scheme, the seedlings are fully originated from a same plant which accords with inheritable character, so that virus accumulation is reduced, the period is short and the effect is achieved fast. Genuine medicinal material dendranthema morifolium is convenient to store and quick to popularize as a conventional resource, and the method is an effective method suitable for factory-like production of the test-tube seedlings.

The invention discloses a manufacturing method of a medical bionic trabeculae structure multihole tantalum bone implant prosthesis through laser additive manufacturing-high-temperature vacuum sintering. The method comprises the following steps of establishing a bone defect prosthesis three-dimensional graph by using CT scanning data, performing transformation design on the bone defect prosthesis graph into a bionic trabeculae multihole shape of which the air porosity is 60-85%; designing a support, wherein the support sufficiently forms firm connection between a basal plate and a printed transplant prosthesis, and after printing is performed, the printed transplant prosthesis is easy to taken off from the printing basal plate by a manual method; and reducing the oxygen content of the transplant prosthesis and relieving stress by using an ultrahigh temperature vacuum sintering heat treatment method so as to obtain a qualified human body transplant prosthesis. The method can prevent pollution of wire cutting on the multihole tantalum transplant prosthesis, the oxygen content of the multihole tantalum transplant prosthesis is reduced, through a conventional technology, connection in series is performed, so that the manufacturing method of the medical bionic trabeculae structure multihole tantalum bone implant prosthesis through laser additive manufacturing-high-temperature vacuumsintering is formed, and the method is a complete technology manufacturing method.

The invention discloses a preparation method of 1,2,3,4,6-pentagalloylglucose reference substances, belonging to the technical field of extraction and purification of traditional Chinese medicine and natural product reference substances. The method comprises the following steps of: crushing white peony root herbs, carrying out reflux extraction and concentration on the crushed white peony root herbs, adding water into the obtained object to dilute, carrying out macroporous adsorptive resin enrichment and desorption on the diluted object two times, and carrying out gel column chromatographic separation on the obtained product so as to obtain a 1,2,3,4,6-pentagalloylglucose reference substance; and through carrying out detection by using a high-performance liquid chromatography, the content can reach more than 98%. The method is lower in cost, simple in steps and strong in specificity.

The invention discloses a method for measuring the normal meshing tooth profile of an involute spiral cylindrical gear, which is used for measuring the normal meshing tooth profile on the tooth surface of a measured gear, and a cross-axis involute spiral cylindrical gear is driven to move through the normal meshing tooth profile. The actual movement working conditions of the transmission quality and the working stability of the gear reflected by the normal meshing tooth profile are measured; in gear hobbing, gear shaving and worm grinding wheel grinding generating method machining, movement of a tool and a gear is achieved based on the normal meshing tooth shape, and control over the normal meshing tooth shape has the unique advantage on control over the gear machining quality. Measurement is achieved through a gear measurement center, four-axis linkage measurement is adopted, and the situation that the measurement precision is prone to being affected by the size of a measured gear is effectively improved. Radial and axial motions are respectively limited to realize simplified measurement of normal meshing tooth profiles and measurement of involutes by a meshing method. The method is suitable for measuring the involute of the straight toothed cylindrical gear, and the normal meshing tooth form on the tooth surface of the gear coincides with the involute, so that the method is also suitable for measuring the involute of the straight toothed spur gear.

The invention relates to a static reactive power compensation control method based on a sequence component method. The static reactive power compensation control method is characterized by comprising the following steps of: converting a, b and c three-phase current to sequence current; performing positive-sequence voltage space vector conversion, negative-sequence voltage space vector conversion and positive-negative-sequence space vector synthesis on the current to obtain positive-sequence and negative-sequence compensating current through a symmetrical component method according to the three-phase current to be compensated; transferring positive-sequence voltage and negative-sequence voltage to be under an (alpha, beta) coordinate system; laminating the values of positive-sequence components and negative-sequence components under the (alpha, beta) coordinate system; performing SVPWM (Space Vector Pulse Width Modulation) control through a DSP (Digital Signal Processor) to generate a series of PWM (Pulse-Width Modulation) signals; and driving an IGBT (Insulated Gate Bipolar Translator) module through a driving circuit to generate the necessary compensation current so as to realize asymmetric static reactive power compensation. The static reactive power compensation control method has the advantages of being scientific, reasonable and applicative, being capable of performing reactive power compensation on a static reactive power compensator of a distribution system, having a good compensation effect, and the like.

A method for monitoring movement of a dam body of a five-level tailings pond is characterized by comprising the following contents of: (1) arrangement of a working base point and a movement observation point; (2) a measurement method; (3) office computation; and (4) achievement data. By the technical scheme, angle measuring accuracy and distance measuring accuracy of the method meet technical requirements of a four-level network, and requirements on observation of the movement of the dam body of the five-level tailings pond can be met basically. The method has the advantages that the tailings pond can be monitored by using a simple measuring method, the principle is simple, the method is suitable and easy to operate, and investment cost is low.

A method of a network node is disclosed. The method is for concurrently transmitting two or more wake-up signals (WUS) using an signal generator applying an signal generator symbol rate, wherein eachWUS is for reception by a wake-up receiver (WUR) of a respective wireless communication device. The method comprises selecting a respective Manchester coding symbol rate for each of the two or more WUS, wherein all of the selected respective Manchester coding symbol rates are different from each other, and all Manchester codes having the selected respective Manchester coding symbol rates are orthogonal to each other. The method also comprises generating each of the two or more WUS using the signal generator and application of a Manchester code of the selected respective Manchester coding symbol rate, and multiplexing the two or more WUS for transmission in a WUS message. A corresponding arrangement, a network node and a computer program product are also disclosed, as well as counterparts for a wireless communication device.

The invention discloses a method for machining an oil seal shaft. In the method, the conventional centerless grinding machine is retrofitted; a grinding wheel of the centerless grinding machine is required to meet the following requirements that: the roughtness Ra is 0.2 to 0.4 and Rz is less than 4; texture directions produced by grinding are required to be parallel with one another and verticalto the central line of the shaft; the grinding wheel is required to be abrasion-proof; the thickness of the grinding wheel is equal to the axial length of an oil seal slot of the shaft; a guide wheelis arranged on one side of the grinding wheel; the axial lines of the grinding wheel and the guide wheel are parallel with each other; a distance between the grinding wheel and the guide wheel is equal to a difference between the diameter of a workpiece and the depth of the oil seal slot; the axle of the guide wheel is connected with the output shaft of a motor; a vertical supporting plate is arranged between the grinding wheel and the guide wheel; the workpiece with a horizontal axial line is arranged on the top face of the supporting plate; and a rotating roller parallel to the axial line of the workpiece is arranged above the position of the workpiece. A machining method for statically grinding comprises the following steps of: positioning the workpiece through the grinding wheel, the guide wheel, the supporting plate and the rotating roller; and starting the motor and injecting grinding solution into a part to be ground for grinding. The roughness and the texture directions of theoil seal slot machined by using the method can completely meet the technical requirements of the oil seal shaft.

The invention provides an electrochemical gas sensor ultrasonic welding tool. The electrochemical gas sensor ultrasonic welding tool comprises a base plate. A containing mechanism for containing an electrochemical gas sensor lower shell is arranged at one end of the length direction of the base plate, and a pressing mechanism cooperating with the containing mechanism to press the electrochemical gas sensor lower shell on the containing mechanism is arranged at the end, away from the containing mechanism, of the base plate. The tool is simple in structure and convenient to operate, the weldingquality and the consistency can be improved, and the situation of pseudo soldering or material overflowing is avoided. The invention further provides an electrochemical gas sensor ultrasonic welding method.

The invention discloses an electric power system risk assessment common cause failure sampling method. The method comprises the steps that a plurality of elements where common cause failures occur during electric power system risk assessment are given, the random number representing the failure state of each element independently is obtained through sampling respectively at first, then a dependency sampling matrix is built, and the random numbers representing the failure states of the elements respectively and obtained through sampling are converted into the random numbers representing the failure states and considering the common cause failure dependency sampling according to the dependency sampling matrix. Further more, the converted random numbers are compared with the failure probabilities of the elements, and finally the failure states of the common cause failure elements are determined through one sampling process. The electric power system risk assessment common cause failure sampling method uses a correlation coefficient matrix to carry out conversion on sampling values, changes independent sampling into dependency sampling, and achieves the sampling of electric power system risk assessment common cause failures. The electric power system risk assessment common cause failure sampling method is simple and suitable, can achieve common cause sampling accurately and is applied to the sampling of electric power system risk assessment common cause failures.

The invention provides a non-line-of-sight identification and positioning method by using anchor point high-dimensional space coordinate information. The method comprises the following steps of in an N-dimensional space multilateral measurement method positioning model, expanding N-dimensional coordinates of the anchor point into N + 1-dimensional coordinates, solving the N + 1-dimensional coordinates, and measuring an error of non-line-of-sight measurement by using the N + 1-dimensional coordinates; and carrying out the non-line-of-sight identification and positioning by using the high-dimensional space coordinate information of the anchor point, and optimizing the positioning result of the to-be-positioned point. The method is suitable for two-dimensional space positioning, three-dimensional space positioning and even N-dimensional space positioning.