134results about How to "Broaden your mind" patented technology

The invention discloses a full-wave nuclear magnetic resonance signal denoising method based on independent component analysis. The full-wave nuclear magnetic resonance signal denoising method is mainly used for power frequency harmonic interference or certain single-frequency interference in full-wave nuclear magnetic resonance signals. The method comprises the steps that firstly, utilizing a nuclear magnetic resonance sounding water detecting instrument for collecting MRS signals, obtaining the frequency of power frequency harmonic interference or certain single-frequency interference contained in the collected signals through spectral analysis, and adopting a digital orthogonal method for constructing input channel signals to solve the underdetermined blind source separation problem; then, using the constructed input channel signals and the collected MRS signals as input signals for conducting independent component analysis to obtain separated MRS signals; finally, adopting the spectrum correcting method for solving the problem that the separated MRS signals have uncertain amplitude, and then extracting denoised MRS signals. According to the full-wave nuclear magnetic resonance signal denoising method, the problem of the underdetermined blind source and the problem of the uncertain amplitude usually existing in independent component analysis are solved, the power frequency harmonic interference or the certain single-frequency interference in the noised MRS signals is effectively filtered out, and compared with a traditional MRS signal denoising method, the full-wave nuclear magnetic resonance signal denoising method has the advantages of being high in arithmetic speed, high in signal to noise ratio, high in practicability and the like.

The invention provides a test case design method based on a test case database system, including the following steps: firstly, extracted test key words are input into a test case database system; secondly, the test case database system queries according to the input test key words, and the following third step is executed when a query result exists; thirdly, the test case database system returns a test case and a test functional point prompt as a query result; fourthly, the test case database system outputs corresponding test case. Through making full use of the prior test cases during test implementation process of the system and providing expert test functional point prompt at the beginning of the design of the test case, the invention realizes effective extension of the thinking of the design staff of the test case, increase of the number of the test cases, shortened assessment time and improvement in assessment efficiency and assessment quality, thereby greatly improving testing quality.

The invention discloses an SIP soft terminal supporting a WEB service and multiple browsers and a working method thereof. The soft terminal is a multimedia terminal of which various interfaces for supporting the WEB service and multiple browsers are configured on the conventional desktop and which uses a webpage browser as an operation carrier. The soft terminal is provided with a JavaScript interface and a soft terminal assembly module, wherein the JavaScript interface is provided with a soft terminal builder and a soft terminal expansion interface; and a soft terminal functional module is packaged as a soft terminal assembly module by using a browser adapter interface. Compared with the conventional soft terminal, the SIP soft terminal has the advantages that: the building of the soft terminal assembly module is triggered by a JavaScript script and finally the soft terminal is embedded in the browser, the trouble of manual installation by the user is saved and a technique for the embedment in the browser is mature and is easy to realize; an operation platform set for developing WEB expansion services, which is a JavaScript-based bidirectional calling interface is provided for a programmer, the working details of a bottom layer soft terminal module is shielded, and the development of rich WEB services satisfying the individual needs of customers by the programmer is made extremely convenient.

The invention belongs to the molecular biology technology field, and concretely relates to a method for sequencing and development of Asplenium nidus L. EST-SSR primers based on transcriptome. The method comprises the following steps: firstly, a transcriptome library is constructed; secondly, transcriptome data is obtained, namely, sequencing data is subjected to splicing by utilization of a Trinity software and sequences are spliced into a complete transcriptome; thirdly, SSR site search is carried out, namely, combined with a Perl programming language method, a lot of sequence information is subjected to batch processing, and SSR site search is carried out; fourthly, batch design of EST-SSR primers is carried out. Different fiddlehead materials are selected to verify the designed SSR primers, if strips are detected, successful SSR primers are obtained. Through the method, 4063 pairs of SSR primers are designed, and a new method and thought are provided for development of Asplenium nidus L. EST-SSR primers and further for achieving molecule label auxiliary selection breeding.

The invention belongs to biotechnology field, and relates to a method for developing a dendranthema SSR (Simple Sequence Repeat) primer based on transcriptome sequencing. A lot of sequence information is processed in batch for searching an SSR sequence and designing an SSR labeled primer based on the transcriptome sequencing by utilizing EST-SSR (Expressed Sequence Tags-Simple Sequence Repeat) interspecific metastasis and using a Perl (Practical Extraction and Reporting Language) programming language method in combination, so that the defects of low efficiency, long time consumption, high cost and the like of the SSR development are conquered. Different dendranthema materials are selected for verifying the designed SSR primer, and the primer is a successful SSR primer if detected out by any strip. By adopting the method, 1788 pairs of SSR primers are successively designed, so that a novel method and thinking are provided for the development of the dendranthema SSR primer to further achieve molecular marker assistant selection breeding and comparative genomics research.

The invention discloses a method for predicting the residual life of a turbine disc of a digital twin-driven aero-engine. The method comprises the following steps: firstly, simulating a vibration signal of an aero-engine turbine disc by utilizing digital twinning of the aero-engine turbine disc; extracting radial displacement, blade circumferential displacement and blade spacing information of theaero-engine turbine disc; extracting aero-engine turbine disc radial displacement, blade circumferential displacement and blade spacing information from the aero-engine turbine disc actual measurement vibration signals subjected to noise reduction processing by using the same extraction method; and calculating a difference value between the aero-engine turbine disc damage model and the aero-engine turbine disc, adjusting and correcting internal parameters of the aero-engine turbine disc damage model by utilizing a difference value calculation result, and finally calculating the residual lifeof the aero-engine turbine disc by utilizing the updated aero-engine turbine disc damage model. According to the digital twin-driven aero-engine turbine disc residual life prediction method provided by the invention, the working condition change of the aero-engine turbine disc can be considered, so that an accurate life prediction result is obtained.

The invention discloses a digital twin driven crack detection and diagnosis method of an aero-engine turbine disk, comprising three parts: the establishment of a digital twin database of an aero-engine turbine disk-rotor-supporting system, the crack detection of the aero-engine turbine disk, and the crack quantitative diagnosis of the aero-engine turbine disk. In a flight process, the flight attitude, speed and altitude of an aircraft will constantly change and are affected by the airflow, the operating conditions of the aero-engine turbine disk, a rotating shaft and a main bearing change accordingly. According to the digital twin driven crack detection and diagnosis method disclosed by the invention, the digital twin technology is imported into the field of crack detection and quantitative diagnosis method of the aero-engine turbine disk, so that the instantaneity and accuracy of the crack detection and quantitative diagnosis result of the aero-engine turbine disk are improved; and anew idea can not only be provided for the research on the crack detection and quantitative diagnosis method of the aero-engine turbine disk, and a way can also be explored for the practical application of the digital twin technology.

The invention belongs to the constructional engineering field and relates to a project beam-column joint for a reverse building method. The technical scheme of the project beam-column jpint for the reverse building method is as follows: after a foundation pit is excavated below the bottom elevation of a structural beam, a steel ring plate is welded in an elevation position opposite to the position of the main reinforcement of the structural beam at the outer side of a concrete filled steel tubular column; the width of the steel ring plate meets the welding requirement of the main reinforcement of the structural beam; the thickness of the steel ring plate meets the force transfer requirement of the main reinforcement of the structural beam. The main reinforcement of the structural beam transfers force to the main reinforcement of the structural beam of the adjacent span through the steel ring plate. The joint has the advantages that the connection of the reinforcements of the structural beam and force transfer among the reinforcements of the structural beam in the position of the beam-column joint in a reverse building foundation pit project are realized successfully, and the trouble of different traversing through the reinforcements of the beam-column joint to technicians in a field for a long time is solved.

The invention relates to a method for preparing a carbon microsphere material with a grading-pore structure by utilizing cassava starch as a raw material. The preparation method comprises the following steps of (I) placing the cassava starch into a water bath at the temperature of 42DEG C to carry out enzymatic hydrolysis with glucolase and amylase with the mass ratio of 1: 1 to 5: 1 for 24 hours, washing the mixture by utilizing deionized water to be neutral, and carrying out freeze drying on the mixture to obtain the porous starch; (II) weighing the porous starch with a given quantity, placing the weighed porous starch into a drying box at the temperature of 180 to 250 DEG C to be pretreated for 4 to 24 hours; placing the pretreated porous starch into a tubular furnace, heating the porous starch at a temperature increasing speed of 1 to 2 DEG C / min to 500 to 700 DEG C under the nitrogen flow rate of 30 to 70 ml / min, and preserving the heat for 1 hour; mechanically and uniformly mixing the carbonized porous starch with the potassium hydroxide according to the carbon-alkali ratio of 1: 2 to 1: 8, placing the mixture into the tubular furnace, heating the mixture at the temperature increasing speed of 2 to 5 DEG C / min to 850 to 950 DEG C under the condition that the nitrogen flow rate is 60 to 100ml / min, and preserving the heat for 1 hour to 3 hours, washing the obtained product after being cooled by utilizing diluted hydrochloric acid and distilled water until the pH value is 6 to 7, and drying at the temperature of 120 DEG C to obtain the grading-pore carbon microsphere.

The invention discloses a sunflower meringle food and a preparation method thereof. Sunflower meal contains rich protein, unsaturated fatty acid, dietary fiber vitamins and trace elements, has a plurality of healthcare and therapeutic effects. The Sunflower meal can be mixed with auxiliary materials, such as flour and the like according to a certain proportion to prepare a convenient food with crisp mouthfeel, pure fragrance, rich nutrition and high protein and fiber by a process of raw material premixing, dough preparation, forming, baking and cooling, packaging, and the like and can also improve the raw material utilization rate and the nutritive value of the sunflower meal so as to improve the comprehensive utilization value of the sunflower meal and create the economic benefits.

The invention discloses a brassica juncea EST-SSR (expressed sequence tag-simple sequence repeat) marker primer group based on development of a transcriptome sequence, and belongs to the technical field of biologics. The brassica juncea EST-SSR marker primer group has the advantages that the primer group is obtained on the basis of development of the transcriptome sequence; on the basis of transcriptome sequencing, a large amount of sequence information is processed by batches, and the finding of an SSR sequence and the primer design of an SSR marker are performed, so as to overcome the defects of fewer SSR markers, low development efficiency and the like in the present brassica juncea; as the brassica juncea and brassica campestris are different materials, the effectiveness and universality of SSR primer are verified, and a foundation is laid for the development of the brassica juncea SSR primer, the auxiliary selecting of the molecule marker, the building of the genetic linkage map, the evaluation of genetic diversity, and the like.

The invention discloses a method for treatment of dye and PVA containing neutral wastewater by a UV collaborated complexing / Fenton system. The steps include: subjecting the wastewater to anaerobic treatment by a microbial porous metal membrane reaction zone and aerobic treatment by a sprouted bed bioreactor, using a complexing agent to form a PVA-polymethylacrylic acid complex, adding a flocculant to form precipitate, utilizing scrap steel and the byproduct waste generated by production of titanium dioxide from ilmenite, and under the irradiation of certain intensity ultraviolet (UV), adding hydrogen peroxide and carrying out magnetic stirring reaction to conduct UV / Fenton oxidation. According to the invention, through dynamic control of the complexing agent, catalyst and hydrogen peroxide adding amount, ultraviolet intensity, time and other key factors, the optimal treatment effect can be obtained, efficient treatment of the dye and PVA containing wastewater can be realized under a neutral pH condition, the scrap steel and the byproduct waste generated by production of titanium dioxide from ilmenite are utilized reasonably so as to achieve waste control by waste, and the treatment efficiency is improved.

The invention relates to an image tampering detection method based on a haze characteristic. The method comprises the following steps of 1) using a plurality of haze characteristic calculation methods to calculate a haze characteristic for an input tampered image and generating several haze characteristic maps; 2) carrying out subtraction on each two haze characteristic maps of the several generated haze characteristic maps, acquiring an absolute value and generating several characteristic difference maps; 3) combining super pixel division of the input image, according to each characteristic difference map, carrying out tampered area and non-tampered area separation on the input tampered image; 4) using a low rank to establish similarities among the tampered areas and the non-tampered areas, and calculating a weight for each tampered area and each non-tampered area; and 5) using the calculated weight to carry out weighting fusion on the tampered areas and the non-tampered areas so as to generate a tampered area positioning map. In the invention, limitation of a splicing tampering detection method based on JPEG compression and a camera internal characteristic can be overcome and detection performance is accurate.

The invention discloses a GSM external radiation radar signal processing method based on digital modulation and demodulation. The GSM external radiation radar signal processing method mainly solves reference signal purification problems of an external radiation source system based on digital modulation and demodulation. The GSM external radiation radar signal processing method comprises the steps that a signal of a reference channel is modulated and demodulated so as to obtain a pure emission signal; the local regenerated pure emission signal is used for conducting clutter cancellation, distance-Doppler detection is conducted, and detection and position information extraction of a moving object are finished. The core of the GSM external radiation radar signal processing method is purification conducted on the reference signal in the reference channel, multi-path and noise influences from the reference signal are removed, the correlation of a target echo signal in an echo channel is improved, and detection power of the system is improved.

The invention relates to a macrophage-mediated drug-loaded hyaluronic acid nanohydrogel and preparation thereof. A drug-loaded hyaluronic acid nanohydrogel is obtained by synthesizing polypyrrole in situ from the interior of a hyaluronic acid nanohydrogel, and loading a drug; and the macrophage-covered drug-loaded nanohydrogel is obtained by performing co-incubation on the drug-loaded hyaluronic acid nanohydrogel and mouse macrophages. The macrophage-mediated drug-loaded nanohydrogel prepared by the method has the advantages of low toxicity, safety, avoidance of phagocytosis of a reticuloendothelial system, and specific targeting in tumor areas when used for delivery of anti-cancer drugs, and has potential application prospects in tumor treatment.

The invention discloses a symmetrical arm quick automatic opening and closing system of an ultralow temperature shielding case, which comprises a support body, a rotation shaft, two bevel gears, a shielding case bracket, a half-box-shaped shielding case, a rotating shaft and bevel gear assembly, a coupler, a rotating servo motor, two spur gears, a piston rod and rack assembly and a linear cylinder, wherein the rotating servo motor drives the half-box-shaped shielding case to symmetrically open by virtue of the rotating shaft and bevel gear assembly, the two bevel gears and the shielding case bracket; and the linear cylinder drives the shielding case to symmetrically open by virtue of the piston rod and rack assembly, the two spur gears and the shielding case bracket. By adopting the synchronous drive configuration that the rotating servo motor drives the staggered bevel gears and the linear servo cylinder drives the gear racks, the synchronous drive by two drive systems is realized, and the quick opening and closing of the half-box-shaped shielding case is realized by coordinating the output torques of the two drive systems. The system realizes quick extraction of the ultralow temperature shielding case, and has significant practical meanings to the ultralow temperature medium application engineering.

The invention relates to a device and method for measuring the Young modulus, in particular to an experimental device and method for measuring the Young modulus of a metal wire according to simple harmonic vibration.The device and method aim at solving the problems that the experiment principle for measuring the Young modulus of the metal wire in a college physics experiment is single and abstract in the prior art.According to the device, a cross beam is arranged at the upper end of a support, an upper chuck and a force sensor are arranged in the middle of the cross beam, the two ends of the metal wire are connected with the force sensor and a lower chuck respectively, and the lower chuck and a metal frame into which an iron block is fixed are fixed together.A measuring device is composed of a differential bridge composed of four capacitors composed of fixed polar plates and movable polar plates, an adjustable alternating voltage source, a voltage amplifying device, a digital oscilloscope and the like.According to the method, the digital oscilloscope is used for measuring the period of periodically-changing bridge output voltage waveforms, the period during which a metal wire spring oscillator conducts simple harmonic vibration is obtained, the period is substituted into a formula, and the Young modulus of the metal wire is calculated.The device and method are suitable for measuring the Young modulus of the metal wire.

A sum-difference beam antenna with asymmetric double artificial surface plasmon is composed of a dielectric substrate (1), and a transition section (2) from a coplanar waveguide to the artificial surface plasmon, an upper artificial surface plasmon (31) and a lower artificial surface plasmon (32) which are on the dielectric substrate (1). Metal conductors (4) are arranged on the two surfaces of the dielectric substrate (1), are symmetrically distributed on the two surfaces of the dielectric substrate (1) and are connected through metallized via holes (5), the upper artificial surface plasmon (31) and the lower artificial surface plasmon (32) share one common side edge (30) but have different dispersion characteristics, and two different modes are transmitted. When the end-fire direction isat different frequencies, the sum wave beams and the difference wave beams are alternately presented, and when the frequency varies between the frequency of the sum beam and the frequency of the difference beam, the beam direction scans around the end-fire direction. The antenna has the characteristic of simple feeding while realizing the sum-difference wave beams, and the feeding loss is reduced.

The invention belongs to the field of degradable medical polymer synthesis and design and preparation of anti-cancer drug conjugates, and discloses adriamycin polyprodrug nano-micelle with reducibility response and a preparation method and application thereof. Hydroxyethyl methacrylate and 4, 4'-dithiodibutyric acid are adopted as basic raw materials, amino of adriamycin is modified, disulfide bond primitives are introduced, an adriamycin prodrug monomer DOXM with disulfide bond reducibility response is prepared, and polyprodrug amphiphilic molecules PDMA-b-PDOXM are prepared through RAFT. ThePDMA-b-PDOXM has very high drug loading capacity, and the water solubility and the stability of the drug are improved. The disulfide bonds enable the drug carrier to respond to a tumor cell reductivemicroenvironment after reaching a tumor targeting site to release a small molecular raw drug adriamycin, so that the drug toxicity is reduced and an anti-cancer drug can be intelligently released intumor cells.

The invention relates to an interface supply device for a soft bag large transfusion production line, in particular to a T-shaped interface supply device for a non-polyvinyl chloride (PVC) soft bag large transfusion production line, which comprises an oscillation hopper, a straight line slide way and a horizontal bracket, wherein the horizontal bracket is arranged under the straight line slide way in parallel; the straight line slide way is located diagonally above the oscillation hopper; and the technical key point lies in that: a clamping device is arranged under the straight line slide way, a straight line guide rail is arranged on the bottom of the clamping device, limiting frames are respectively arranged on the two ends of the straight line guide rail, clamping hands are arranged on the straight line guide rail, and a parallel gas claw is arranged on the upper end of each clamping hand. The continuous operation of the T-shaped interface production line can be realized, so that the automatic feeding problem of T-shaped interfaces is solved successfully and the development idea of a soft package transfusion manner is expanded through the T-shaped interface supply device for the PVC soft bag large transfusion production line provided by the invention.

The invention relates to the cultivation technique of high quality forage grass, that is, a cultivation technique of high quality and high yield forage grass for barley multiple-planting oats in Alpine region of North China, in particular to the cultivation technique of the high quality and high yield forage grass, which can produce two stubble of forage grass a year and increase forage yield in the Alpine region of North China according to the growth characteristics of barley and oats and requirements of ecological environment. The cultivation technique specifically includes the integrated technology of variety selection, sowing time, sowing mode, sowing quantity, harvesting mode, multiple planting mode and the like. The farming system of forage planting once a year in the Alpine region of North is changed, the multiple planting index is increased, plastic films are not used, the amount of water, fertilizer and pesticides is reduced, less straw residue is caused, environmental pollution is reduced, the optimal selection mode of rotation stubble is achieved, the supply capacity of the forage grass is improved, the pressure of natural grassland is alleviated, and higher ecological,social and economic benefits are achieved.

The invention provides a simple harmonic oscillation based experimental device and method for measuring the Young's modulus with a beam bending method, relates to a Young's modulus measurement device and method and aims to solve the problems that the experimental principle of the Young's modulus measurement with the beam bending method in current college physical experiments is comparatively single and abstract and a telescope is greatly difficult to adjust. The device is characterized in that two vertical columns are arranged on a base, two ends of a metal beam with a rectangular section are freely arranged in a spanning manner at tool edges at the upper ends of the vertical columns, the metal beam is sleeved with a copper frame, a force sensor and an iron block are arranged at the lower end, an electromagnet device is arranged below the iron block, a scale is arranged on a scale base, and a laser and a photoelectric sensor connected with an intelligent photoelectric timer are arranged on the scale. According to the method, a cycle of simple harmonic oscillation performed by a metal beam spring oscillator is obtained on the basis of measurement of a cycle of the simple harmonic oscillation performed by light spots formed on the scale by a laser beam which is emitted by the laser and reflected through a plane mirror of an optical lever, the cycle of the simple harmonic oscillation performed by the metal beam spring oscillator is substituted into a formula, and the Young's modulus is obtained through calculation. The device and the method are applicable to measurement of the Young's modulus.

The invention discloses recombinant lactococcus lactis yielding nisin highly and a construction method. The construction method comprises the following step: importing a lipoprotein signal peptidase gene lspA into lactococus lactis subsp.lactis YF11, the preservation number of which is CGMCC No.12429, to obtain recombinant lactococcus lactis YF11-lspA, wherein the nucleotide sequence of the lipoprotein signal peptidase gene lspA is as shown in SEQ ID NO.1. The recombinant lactococcus lactis improves the nisin endurance capacity of nisin producing strains so as to reduce inhibition of nisin togrowth of the strains in the fermenting process, so that the output of nisin is improved and the output of nisin of the lactococus lactis subsp.lactis YF11 is improved obviously.

The invention belongs to the field of medical and health, and particularly relates to application of a product detecting the expression level of a biomarker in carcinogenesis state indicating. The biomarker is LBP, a gene encoding LBP, or a polypeptide or polypeptide fragment synthesizing the LBP. It is proposed by the invention for the first time that the level of exosome protein LBP in serum ofpatients with non-small cell lung cancer is significantly higher than that of a healthy contrast group, and the level of exosome protein LBP of patients with metastatic non-small cell lung cancer is significantly higher than that of patients with non-metastatic non-small cell lung cancer, and therefore, the level of the exosome protein LBP in serum can be utilized for distinguishing patients withnon-small cell lung cancer from a contrast case, distinguishing metastatic non-small cell lung cancer, non-metastatic non-small cell lung cancer, lung adenocarcinoma and squamous-cell lung cancer.

The invention discloses a laser brazing weld surface defect detection method based on envelope line recognition, comprising the following steps: after weld surface contour data is obtained, real-timefitting is carried out on an actual contour curve by adopting a weighted cubic spline curve to obtain a standard contour, and the standard contour is respectively translated upwards and downwards fora fluctuation distance to obtain a weld qualified interval; the actual contour curve is compared with a reasonable weld interval: when the actual contour curves are completely located in the reasonable weld interval, the weld has no defects; when the actual contour curve is higher than an upper contour line or lower than a lower contour line and the area of the exceeding part is greater than or equal to a threshold value, the weld contour is unqualified; when the continuous appearing number of the unqualified weld contours reaches a weld defect critical dimension value, it is judged that the weld has defects; and on the basis, defect classification is carried out and a corresponding characteristic value is calculated. According to the weld surface defect detection method, weld defects canbe rapidly and accurately detected, and the weld surface defect detection method is insensitive to interference caused by the environment, sensors and the like.

The invention discloses a magnetic resonance sounding signal sparse denoising method based on particle swarm optimization. The method is mainly used for processing the power frequency harmonic interference and the random white noise in magnetic resonance signals. The method comprises the steps of firstly, preprocessing the MRS signals collected by a magnetic resonance sounding water exploration instrument in a band-pass filtering mode, obtaining the power frequency harmonic interference contained in the collected signals and the frequency of the MRS signals through frequency spectrum analysis,and constructing the oscillation atom libraries for the MRS signals and the power frequency harmonic noise characteristics respectively; secondly, recording an individual extremum and a population extremum by adopting a particle swarm algorithm to update the speed and the position of each particle in the particle swarm, and selecting an optimal atom from a power frequency harmonic oscillation atom library to reconstruct the power frequency so as to remove harmonic interference; and finally, selecting an optimal atom from the MRS signal oscillation atom library by using a particle swarm algorithm to reconstruct the MRS signal, if the MRS signal does not meet the experimental requirements, calculating a residual error signal, and repeatedly iterating until the condition is met. According tothe method, a novel atom library for the MRS signal is constructed, the power frequency harmonic interference and the random white noise in the noise-containing MRS signal are effectively filtered, and compared with a traditional MRS signal denoising method, the method has the advantages of being fast in operation speed, high in precision, strong in practicability and the like.

The invention discloses an SAR image non-reference quality evaluation method based on multi-view amplitude statistics characteristics. The problems of high implementation difficulty and low stability in the prior art are solved. The method comprises the steps that 1 a training sample and a test sample are extracted from an SAR image database; 2 the global equivalent visual acuity, the local maximum equivalent visual acuity and the ratio of the global equivalent visual acuity to the local maximum equivalent visual acuity of SAR images are calculated; 3 the fuzzy correlation coefficient of the SAR images is calculated; 4 fitting square root gamma distribution in the homogeneity region in the SAR images is selected; 5 the eigenvectors of all samples are extracted; 6 an eigenvector threshold is set to classify noise images; 7 a quality evaluation prediction model is trained for SAR images with different noise pollution types; 8 the quality value of the test sample is calculated; and 9 the quality of the test sample is determined according to the test sample quality value. According to the invention, the practicability and accuracy of SAR image quality evaluation are greatly improved, and the method can be used for screening SAR images.

The invention discloses a ceramic glaze prepared from waste concrete powder and a preparation method of the ceramic glaze. The ceramic glaze consists of the following components in parts by weight: 30-50 parts of feldspar powder, 15-30 parts of quartz powder, 3-10 parts of kaolin, 30-50 parts of glaze stone powder, 6-50 parts of a mixture of waste concrete powder and glass powder, 4-12 parts of talcum powder and 2-5 parts of ZnO. The ceramic glaze prepared from the waste concrete not only can solve a problem on handling construction waste but also can achieve the recycling of the construction waste. By virtue of the ceramic glaze prepared by the invention through the waste concrete powder, the additional value of recycling the waste concrete can be greatly improved, and the thought of recycling the waste concrete is widened. The method is applicable to the preparation of the ceramic glaze, and is capable of achieving the recycling of the construction waste; and since the waste concrete powder is high in quantity and low in cost, the quantity of natural resources adopted by the ceramic glaze can be reduced.

An experimental device and method for measuring Young's modulus by the beam bending method based on the resonance principle relates to a Young's modulus measuring device and method. Difficult question. The device of the present invention includes two columns on the base, the two ends of the metal beam with rectangular cross-section are freely straddled on the knife edge of the upper end of the column, a copper frame is placed on the metal beam, and a vibration exciter and a movable armature are arranged at the lower end. Connected with the signal source, the measuring device is composed of a differential bridge composed of two inductance coils and two resistors, an AC voltage source, an amplifying device and an oscilloscope; the method of the present invention converts a sinusoidal signal into a mechanical vibration by using an exciter to make the metal The beam spring vibrator is forced to vibrate, and the electric bridge composed of variable inductance is converted into an electrical signal, and the frequency of the signal is adjusted. When the waveform amplitude is maximum, the natural frequency of the metal beam spring vibrator is obtained, and the Young's modulus is calculated. The invention is applicable to the measurement of Young's modulus.

The invention relates to the technical field of inverted pendulum control, in particular to a method for designing a reduced-order observer of an inverted pendulum. The method includes the steps that a movement differential equation set of an inverted pendulum control system is obtained and subjected to linear processing to obtain a state space equation of a controlled object; the reduced-order observer is constructed in the inverted pendulum control system and used for observing a state quantity which cannot be directly measured in the inverted pendulum; a feedback controller based on the reduced-order observer is designed, so that the inverted pendulum control system is stable. The method is capable of observing unmeasured state quantities in the inverted pendulum control system, so the observer is more targeted, the computation amount and design complexity are further reduced, and the concept of an observer design method is widened.