31results about How to "Improve system adaptability" patented technology

The invention discloses a fresh pericarpium zanthoxyli oleoresin separation and purification process which comprises the following steps: after harvesting fresh pericarpium zanthoxyli, carrying out cold pressing within two hours to obtain fresh pericarpium zanthoxyli oleoresin, carrying out countercurrent extraction separation on the fresh pericarpium zanthoxyli oleoresin through a liquid substance extraction and separation unit of a supercritical CO2 fluid dynamic countercurrent extraction and separation system, and after the countercurrent extraction separation is completed, obtaining fresh pericarpium zanthoxyli resin from the extraction unit, and obtaining fresh pericarpium zanthoxyli essential oil through a separation unit. The extraction separation process is as follows: the feeding rate is 40kg / h, the CO2 flow rate is 600L / h, the extraction temperature is 45 DEG C, and the extraction pressure is 20MPa; the separation I temperature is 40 DEG C, the separation I pressure is 7.5 MPa, the separation II temperature is 55 DEG C, and the separation II pressure is 4-6 MPa; the total yield of the oleoresin product reaches 98.74%-99.17%, and the separation efficiency of volatile oil reaches 94.00%-99.24%; the volatile oil content of the obtained essential oil can reach 101.94-128.93 ml / 100g; the content of amide substances in the obtained resin can reach 575.22 mg / g to 645.99 mg / g, and the content of the amide substances is increased to 79.08% to 98.25%. According to the process disclosed by the invention, the fresh pericarpium zanthoxyli essential oil with high volatile oil content and the fresh pericarpium zanthoxyli resin with a high amide substance content can be obtained, and the purification effect of the two products is remarkable.

The invention provides a concrete distributor automatic pre-calibration method based on laser ranging, and relates to the field of automatic control of prefabricated component concrete distributors inbuilding industrialization. The method comprises the steps that a laser distance sensor is mounted, and meanwhile the axis X and the axis Y are determined; the distance between the laser distance sensor and a bottom mold tray and the distance between the laser distance sensor and a magnetic side mold are measured, and the permissible error range is set; the initial position that a distributor arrives at the position outside a distribution area is controlled, and a controller is utilized for recording the pre-calibration point of the laser distance sensor of the distributor; the pre-calibration point of the distributor is calculated by the controller; and the relative position of the distributor is calculated, the distributor is controlled by the controller to move to the pre-calibration point, and distribution production is prepared. According to the method, modification to existing equipment and detection systems is small, the modification cost is low, compatibility with existing distribution systems is good, and operation is easy to implement; and meanwhile, pre-calibration of the distributor can be completed automatically, and the accuracy that the concrete distributor determines the pre-calibration point and the pre-calibration efficiency can be improved.

The invention relates to the field of chemical analysis, in particular to a detection method for a quinazoline-7-ether compound and related substances thereof. The detection method comprises the following step: detecting the content of a to-be-tested sample with the synthetic quinazoline-7-ether compound by using high performance liquid chromatography to respectively obtain the contents of the quinazoline-7-ether compound and the related substances thereof in the to-be-tested sample, wherein the quinazoline-7-ether compound has a structure shown in the formula I; the related substances of thequinazoline-7-ether compound comprise one or more of structural compounds shown in the formulas (II) to (IV); and a mobile phase used in the high performance liquid chromatography detection process isan ammonium acetate-phosphate buffer solution, methanol and acetonitrile. According to the detection method of the quinazoline-7-ether compound, disclosed by the invention, an ammonium acetate-phosphate buffer solution-methanol-acetonitrile elution system is adopted, so that the detection of the quinazoline-7-ether compound and other related substances is benefited. (The formula is shown in the description).

The invention relates to the field of analytical chemistry, and in particular relates to a detection method of ambrisentan related substances. The detection method comprises the following steps: preparing a solution for test products by using a to-be-detected ambrisentan product, diluting the solution for the test products for 100 times to be used as a reference solution, then respectively performing HPLC (High Performance Liquid Chromatography) detection by using a trifluoroacetic acid aqueous solution as a mobile phase A and a trifluoroacetic acid acetonitrile solution as a mobile phase B, and measuring the content of the related substances according to a self-contrasted method of main components added with correction factors. The detection method disclosed by the invention adopts an acetonitrile-water-trifluoroacetic acid gradient elution system, and ensures that a chromatographic peak of ambrisentan has higher separation degree with other related substance peaks, and the chromatographic peak of ambrisentan is relatively high in peak type symmetry, so that the detection method is beneficial to detection on the related substances, has relatively high system suitability, also shows incomparable advantages in specificity, quantitation limit, detection limit, linear range and repeatability, and has relatively high precision degree.

The invention provides a frequency offset estimation and compensation method based on broadband frequency hopping system. The method comprises the following steps: dividing each to-be-transmitted message into a plurality of pulses with the two ends of each pulse added by a synchronous frame header consisting of known pseudo-random sequences; correlating the front end and the back end of the received synchronous frame header with the local PN codes respectively to obtain the frequency offset estimation values; normalizing the frequency offset estimation values of different frequency points; utilizing the signal-to-noise ratio estimation information as weighted values for weighted sums so as to obtain relatively accurate frequency offset estimation values; then, conducting anti-normalization followed by the compensation for the different frequency points so as to obtain the phase offset estimation value of each pulse; conducting phase offset compensation; and finally restoring the received data and conducting coherent demodulation. The method proposed in the invention can estimate and compensate the frequency offset in a high speed wide frequency hopping system, and can provide good performances especially in a complex electromagnetic environment.

The invention discloses a buckle plate type track expansion adjusting structure of a medium-low speed magnetic levitation transportation system for effectively relieving the driving problem caused by temperature difference expansion deformation of a large-span bridge. The structure comprises a rib plate type track panel, track bearing tables, cushion plates, foundation bolt components and buckle plates, wherein a main body of the rib plate type track panel consists of sleeper units longitudinally arranged at intervals, and two longitudinal connecting plates fixedly connecting the sleeper units into a whole and transversely arranged at intervals; rib plates are welded between the sleeper units and the longitudinal connecting plates; two lines of the track bearing tables are transversely arranged on a bridge body at intervals; the cushion plates are arranged between the top surfaces of the track bearing tables and the bottom surfaces of the longitudinal connecting plates; buckle plate fixing convex blocks are transversely arranged on the top surfaces of the cushion plates at intervals; the lower parts of the foundation bolt components are embedded and fixed in the bridge body; and the upper parts penetrate through the track bearing tables and the cushion plates to tightly press the buckle plates on the longitudinal connecting plates and the buckle plate fixing convex blocks.

An elastic strip pressing type low and medium speed magnetic levitation traffic system track stretching adjusting structure aims to effectively solving the traffic problem caused by temperature difference stretching deformation of a large-span bridge. The elastic strip pressing type low and medium speed magnetic levitation traffic system track stretching adjusting structure comprises a rib plate type track row, track bearing tables, base plates, sleeper transverse check blocks, foundation bolt assemblies and elastic pressing strips. The track bearing tables are transversely arranged in two rows on a bridge body in a spaced mode. The base plates are arranged between the top faces of all the track bearing tables and the bottom face of a longitudinal connecting plate, and elastic strip fixing lugs transversely arranged at intervals are arranged on the top faces of the cushion plates. The cross section of the sleeper transverse check blocks is in an L shape, the sleeper transverse check blocks are reversely buckled between the elastic strip fixing lugs and the longitudinal connecting plate. The lower portions of the foundation bolt assemblies are pre-buried and fixed in the bridge body, and the upper portions of the foundation bolt assemblies penetrate through the track bearing tables and the base plates to press the elastic pressing strips tightly on the sleeper transverse check blocks and the elastic strip fixing lugs.

The invention discloses a multi-vehicle universal stepless transmission oil and a preparation method thereof. The multi-vehicle universal stepless transmission oil is made of raw materials including the following parts by weight: synthetic base oil: 42-47 parts, deeply refined Type III base oil: 31-35 parts, colorant: 0.02-0.04 parts, functional agent: 20-23 parts; the functional agent includes the following raw materials in parts by weight: acrylamide-pentanediol diacrylate copolymer: 67 ~72 parts, tricresyl phosphate: 7~12 parts, didecylphenyl phosphite: 12~16 parts, high alkali value synthetic calcium sulfonate T106: 6~10 parts, antioxidant 3~6 parts, 0.9-1.5 parts of defoaming agent, 0.5-0.8 parts of rust inhibitor. The multi-vehicle general-purpose continuously variable transmission oil of the present invention has comprehensive properties such as good shear resistance, oxidation resistance, good anti-foam performance, and good anti-wear performance, and can be used for multiple vehicle types, and the shear resistance performance is improved during use. , anti-oxidation performance, good anti-foam performance and good anti-wear performance can maintain stability and durability.

The invention relates to a starting control circuit for the output linear voltage of a switching power supply. The circuit comprises an error amplifier unit, an output sampling unit, a reference voltage unit, a current control unit, a discharging circuit unit and a first capacitor C1. One end of the first capacitor C1 is connected with the input end of the error amplifier unit, and the other end of the first capacitor C1 is grounded. The input end of the output sampling unit is connected with the output voltage of a power supply, and the output end of the output sampling unit is connected with the input end of the error amplifier unit. The output end of the reference voltage unit is connected with the input end of the error amplifier unit. The output end of the current control unit is connected with the input end of the error amplifier unit. The input end of the discharging circuit unit is connected with the output end of the reference voltage unit. According to the technical scheme of the invention, during the starting process of the switching power supply, the waveform of the output voltage of the switching power supply can be controlled to have the linear rising characteristic. Therefore, the circuit security and the circuit adaptivity are improved. Meanwhile, the safety of a load system can be ensured.