42results about How to "Evaluation quality" patented technology

The invention discloses a method for analyzing an active component in harmel grass. The method comprises the following steps of: constructing a finger print, analyzing the active component in a qualitative manner through the finger print, detecting the content of the active component through an HPLC (high performance liquid chromatography) method, wherein the finger print comprises a TLC (thin-layer chromatography) finger print and / or HPLC finger print. According to the invention, the constructed finger print has excellent reproducibility and specificity, and has good stability, precision and application sample recovery ratio on the content detection method of the active component, can realize qualitative and quantitative analysis of various active components such as vasicine, peganine, harmine, deacetylation harmel glycoside and harmel glycoside in the harmel grass, can fully evaluate the quality of the harmel grass, and can provide scientific reference for medicinal value of research and development on harmel grass; and the analyzing method provided by the invention has the advantages of simplicity in operation, velocity, economy, strong operability and the like, and can carry out popularization and application.

The invention discloses a dried noodle smoothness detection device which is favorable for objectively evaluating the quality of the dried noodle. The detection device is characterized by comprising a base (2), wherein a fixing bracket (18), a noodle clamping mechanism and a power device (17) are arranged on the base (2); a lifting arm (12) is arranged on the fixing bracket (18) and can perpendicularly move under the action of the power device (17); and an upper clamp (10) connected with a mechanic sensor (11) is arranged on the lifting arm (12) and is positioned above the noodle clamping mechanism. The detection method is scientific, reasonable, simple and feasible, and suitable for industrialization application. The detection device has the advantages of simple structure, convenience in operation, and scientific and reasonable detection method; and in addition, the dried noodle smoothness can be accurately reflected through the friction resistance, which is favorable for objectively evaluating the quality of the dried noodle.

The invention belongs to the numerical control machining related technical field and discloses a B-spline fitting method for a five-axis cutter path. The method includes the following steps that: S1,a five-axis B-spline cutter path is established according to a five-axis discrete cutter path; S2, the maximum chord height difference of the five-axis B-spline cutter path is calculated, and the chord height constraint and smoothness of the five-axis B-spline cutter path are detected, wherein the smoothness of the five-axis B-spline cutter path includes the smoothness of the B-spline path of a cutter location point, and the smoothness and isometric precision of a cutter shaft; and S3, the five-axis B-spline cutter path is adjusted according to the obtained maximum chord height difference of the five-axis B-spline cutter path and the detection result of the smoothness of the five-axis B-spline path of the cutter location point, so that a five-axis B-spline cutter path satisfying a machining requirement is established. With the method of the invention adopted, the quality of the five-axis B-spline cutter path can be comprehensively and efficiently evaluated, and the obtained cutter pathcan satisfy the high-speed and high-precision machining requirement of a five-axis numerically-controlled machine tool.

The invention provides a kind of HPLC method (oxalic acid, L-malic acid, citric acid and fumaric acid) of the HPLC method (oxalic acid, L-malic acid, citric acid and fumaric acid) of a kind of simultaneous determination of 4 kinds of organic acids in S. (succinic acid, cis-aconitic acid and trans-aconitic acid). The HPLC detection method of the present invention can simultaneously measure various organic acid components in the medicinal material Nanxing variegata, and has the advantages of simple operation, high sensitivity, good specificity and high accuracy, and can effectively evaluate the quality of the medicinal material Nanxing variegata.

The present invention relates to a method for monitoring a joint, in particular a method for monitoring a joint during a joining process by means of laser radiation, in which method: measurement is made in front of the machining point in the machining direction a joint to detect the position and geometry of the joint; determine a position of the seam behind the process at least from the position of the joint in front of the process; and The seam is measured at the determined position behind the processing point in the processing direction to detect geometric properties of the seam. The invention also relates to a device for carrying out the method and a laser processing head equipped with such a device.

The invention relates to a high performance liquid chromatography analysis method of neticonazole hydrochloride and belongs to the technical field of pharmaceutical analysis. The high performance liquid chromatography analysis method utilizes an octadecyl bonded silica-filled chromatographic column having specifications of 4.6mm*150mm, 5 microns or 4.6mm*200mm, 5 microns or 4.6mm*250mm, 5 microns, an acetonitrile-water mixture as a mobile phase having a volume ratio of acetonitrile to water of 45-65: 35-55, a flowing rate of 0.5-0.9mL / min, a column temperature of 30-40 DEG C, a ultraviolet detector wavelength of 280-290nm, and a sample introduction volume of 5-50 microliters. The high performance liquid chromatography analysis method of neticonazole hydrochloride can utilize a common liquid chromatograph, has low equipment requirements, utilizes two easily available mediums of the mobile phase, has high feasibility, has simple and convenient operation processes, has good applicability and can be widely used for neticonazole hydrochloride and its preparation.

The invention discloses a method for constructing the fingerprint of Tianmeng Oral Liquid and its application. The method includes: preparation of the test solution, preparation of the reference solution, optimization of chromatographic conditions, measurement and analysis of the obtained spectrum by fingerprint software to process. The present invention adopts chromatographic columns of different stationary phases to be connected through a six-way valve, and the same mobile phase is gradiently eluted, and a variety of characteristic index components are well separated. As many characteristic components as possible are separated and detected, and more characteristic peaks of fingerprints are obtained, which can more comprehensively reflect the component information of Tianmeng Oral Liquid. Good and other advantages, it can more comprehensively and scientifically evaluate the quality of Tianmeng Oral Liquid, so as to ensure the quality and curative effect of the product, and provide a reference for the improvement of its quality standards.

The invention relates to a color image digital watermark method capable of resisting stamping, printing and scanning processes and belongs to the technical fields of anti-counterfeit, authentication and information safety. The invention adopts the technical scheme that an L*a*b* color space of a color carrier image is represented by quaternary supercomplex number; readable watermark information is encoded and modulated to generate a two-dimensional watermark signal in a form of the quaternary supercomplex number; and the watermark embedding position is determined by a uniform discrete logarithmic polar coordinates method. The color image digital watermark method capable of resisting stamping, printing and scanning processes has the beneficial effects that the embedding capacity of watermarks is large; the robustness resisting synchronous distortion is strong; the gap of an image quality evaluation function of the color image is filled; self-adaption embedding of the watermarks with highest strength is realized; the robustness resisting rotation, compression, stamping, printing and scanning attacks is strong; and the method can be widely applied to anti-counterfeiting domain authentication of various certificates and printed products.

The invention discloses a method for simultaneously determining the content of four active ingredients in scutellaria breviscapine, the four active ingredients are scutellarin, scutellarin, scutellarein and apigenin, and the method adopts the following chromatographic conditions: Column: C 18 Liquid chromatography column; flow rate: 0.8~1.2ml / min; column temperature: 25℃~35℃; detection wavelength: 335nm; injection volume: 2μl; mobile phase A: water; mobile phase B: acetonitrile; mobile phase C: 0.3% phosphoric acid in water; using gradient elution. The invention has the advantages that the measuring method is accurate, reliable, scientific and reasonable.

The invention discloses a method for judging the comprehensive performance of coating quality, which comprises the following steps: 1) conducting conventional plastic deformation tests such as unidirectional tension or compression on a test piece on a tension-compression testing machine in a test system; 2) when stretching or compress to a certain extent, carry out load preservation, and measure the cross-sectional area of ​​the sample; 3) through the indentation tester integrated in the system, perform semi-automatic multi-point vertical compressive stress on the coating surface of the parallel section of the specimen while maintaining the load 4) After the indentation instrument is finished working, the system automatically removes the tensile or compressive load, and judges and records the tensile or compressive stress at the coating failure point and the vertical compressive stress through the microscopic imaging equipment that comes with the system. stress. The invention obtains the failure mechanism relationship curve of the sample coating by carrying out tension or compression on the integrated test system while maintaining the load of the sample, and carrying out vertical compressive stress or frictional loading, so that it can be comprehensive and practical. To evaluate the surface coating quality of materials.