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49results about How to "Guaranteed reproducibility" patented technology

Ultrasonic phased array full-focusing mechanical arm scanning method for seamless steel rail weld defects

The invention provides an ultrasonic phased array full-focusing mechanical arm scanning method for seamless steel rail welding seam defects, and relates to the field of welding seam detection.The ultrasonic phased array full-focusing mechanical arm scanning method comprises the steps that S1, a flaw detection car advances on a steel rail route, a laser scanner synchronously scans a steel rail, and the flaw detection car stops when the surplus height of a steel rail welding seam is collected; s2, the upper computer corrects the preset scanning path point set through an automatic guide positioning algorithm to obtain a new scanning path point set, and a maintenance path is generated; s3, the upper computer drives the mechanical arm to clamp the ultrasonic phased array probe to scan along the maintenance path; and S4, the ultrasonic phased array displays a real-time full-focusing imaging picture according to the scanned and acquired signal data and can record the detected defects. According to the method, the full-section position of the steel rail weld defect is automatically scanned, the mechanical arm scanning path is corrected by using an automatic guide positioning technology, and the positioning error influence of a mechanical arm scanning program in automatic application is solved.
Owner:CENT SOUTH UNIV

Micro-area variable-angle grazing incidence wide-angle scattering test method

The invention provides a micro-area variable-angle grazing incidence wide-angle scattering test method based on a single-crystal X-ray diffractometer, which comprises the following steps: preparing a sample from a test material deposited on a substrate, and placing the sample on an improved sample rack which is provided with a specific structure and a driver for controlling an incident angle and the like; selecting an X-ray light source, aligning the X-ray light source with the sample, and switching and matching a copper target and a molybdenum target; z-scan scanning and tilting scanning along a light path direction and a direction vertical to the light path are carried out, and related parameters are set; the scattered X-rays are collected through a two-dimensional surface detector; and finally obtaining a correlation graph through software integration. Specific requirements for the table size, scanning parameters and the like of the improved sample holder are met, a height reference position, an adjusting structure and the like are further arranged, and a connecting part is installed on an equipment sample table through screw joint. The problems of inaccurate incident angle and height control and the like in the prior art are solved, and the test accuracy and reliability are improved.
Owner:WESTLAKE UNIV

Method for determining moisture of Chinese dates

The method comprises the following steps: taking Chinese dates, removing kernels, crushing or slicing, weighing particles or fragments, pre-drying at 80-90 DEG C for 0.5-2.5 hours, heating to 105 DEG C, drying to constant weight, and calculating according to the lost weight after weighing. According to the method, the water in the jujubes is slowly dried at a low temperature (85 DEG C) through temperature programming, the water evaporation rate of an outer-layer sample is low, and the water evaporation rate of an inner sample can be kept, so that the inner and outer water evaporation balance is ensured, the number of times required by the difference between two times of weighing is reduced to 1-3, the inspection and detection time is shortened, and the detection efficiency is improved. The efficiency is improved, the reproducibility and reliability of the result are ensured, and the practical popularization and application value is achieved.
Owner:CHENGDU INST OF DRUG CONTROL

A multi-core cache coherency debugging method based on multi-view access

The application discloses a multi-core cache consistency debugging method based on multi-view access and belongs to the field of multi-core processor debugging. The method is characterized in that a target address is specified in a main memory by a host computer through a JTAG debugging interface, five groups of data of CPU view, L1 data cache view, L1 instruction cache view, L2 view and real memory view corresponding to the address are read in turn, whether cache is invalid is judged by comparing data consistency, and a cache level inconsistent is marked. The debugging system comprises a built-in JTAG TAP controller, an enhanced debugging access module, a storage level access arbitrator and a data and state collector. The application realizes direct access of the JTAG interface to data of each level of cache, does not need to modify hardware or disable cache, does not interfere with system operation, can quickly locate cache consistency problems under a multi-core architecture, improves debugging efficiency and accuracy, and is suitable for debugging scenes of large-scale multi-core processors.
Owner:58TH RES INST OF CETC

SERS (Surface Enhanced Raman Scattering) flexible sensor based on dual-ion modification as well as preparation method and application thereof

PendingCN121954838Ahigh selectivityhigh sensitivityRaman scatteringIonophoric ActivityKynurenic acid
The invention discloses an SERS (Surface Enhanced Raman Scattering) flexible sensor based on dual-ion modification as well as a preparation method and application of the SERS flexible sensor, and belongs to the technical field of biomedical detection. A bacterial cellulose membrane (BCM) is used as a base material, cation modification (QBCM) is carried out through glycidyl trimethyl ammonium chloride (EPTMAC), anion modification (TABCM) is carried out through tannic acid (TA), a functional substrate with asymmetric charge distribution and a porous structure is constructed, then Ag NPs are loaded on the modified base material through an in-situ reduction method, the QBCM-coated AgNPs and TABCM-coated AgNPs dual-ion active substrate is formed, and the AgNPs / TABCM-coated AgNPs dual-ion active substrate is used for preparing the composite material. The SERS flexible sensor is integrated through a layer-by-layer self-assembly (LbL) technology; the SERS flexible sensor can realize specific enrichment and synchronous detection of anionic kynurenic acid (KYNA) and cationic spermine (Spm) in urine, and is low in detection limit and good in reproducibility.
Owner:FUJIAN NORMAL UNIV

Carbon fiber gauze, preparation method thereof and carbon fiber reinforced composite material

The invention provides a carbon fiber gauze, a preparation method thereof and a carbon fiber reinforced composite material. The carbon fiber gauze comprises short carbon fibers and carbon nanotubes, wherein the carbon nanotubes are bonded to the short carbon fibers through a polymer adhesive; and the mass percent of the carbon nanotubes in the carbon fiber gauze is 1.8-18.6%. According to the carbon fiber gauze, chopped carbon fibers and carbon nanotubes are organically combined, and a unique multi-scale hierarchical toughening structure is constructed. When the carbon fiber gauze is used in a carbon fiber composite material, the chopped carbon fibers play a role in bridging and deflecting cracks among layers, so that the propagation of microcracks can be effectively inhibited. And the carbon nano tube absorbs energy in a resin-rich area at the crack tip of the carbon fiber composite material through mechanisms such as pulling out and breaking, so as to inhibit the generation of nano-scale cracks. In addition, the carbon nanotubes are adhered to the short carbon fibers through the polymer adhesive, so that the carbon nanotubes can be firmly fixed on the short carbon fibers, and the functional stability of the carbon fiber gauze or the carbon fiber composite material is ensured.
Owner:ZHONGFU SHENYING (SHANGHAI) TECH CO LTD

Method for adjusting leaf amplification factor of double-layer multileaf collimator

The application discloses a kind of double-layer multileaf collimator leaf amplification factor adjustment methods, comprising: the grating blade stroke is segmented according to preset interval;Respectively, the upper grating and the lower grating are independently calibrated, the equal center plane field width of each segmented point is measured, and the amplification factor is calculated;For the segmented point that cannot be directly measured, segmented linear interpolation is used to complete;Amplification factor is written into control system and the whole stroke accuracy is verified through multi-field strip field.The application fits the nonlinear characteristics of single-focusing grating amplification factor by segmented measurement, adapts to the difference of double-layer structure by independent calibration of upper and lower layers, realizes full-stroke coverage by interpolation completion, and finally improves the positioning accuracy of field boundary, significantly improves the accuracy and safety of radiotherapy.
Owner:JIANGSU RAYER MEDICAL TECH GO LTD

Concrete mix proportion intelligent generation and online compliance checking method and system

ActiveCN122245572BReduce the probability of defaultMeet real-time requirements
This invention discloses a method and system for intelligent generation and online compliance verification of concrete mix proportions, relating to the fields of intelligent concrete engineering and industrial internet technology. The method includes training a multi-objective prediction model using a joint loss function containing a supervision error term and an engineering physical constraint penalty term, guiding the model output to tend towards the engineering rule boundary set; inputting the sample to be predicted into the model to obtain the original prediction result; verifying the original prediction result; if it does not meet the engineering rule boundary set, generating a pattern vector, and matching a deterministic repair operator sequence from a repair strategy mapping table based on the pattern vector and key process parameters, thereby obtaining the final mix proportion that meets the constraints through repair; if the repair fails, outputting a safe alternative mix proportion or reverting to a historical effective mix proportion, and issuing an alarm. This invention, through the synergy of soft constraint training and rule-based repair, ensures that the output meets 100% of the engineering constraints while maintaining accuracy.
Owner:SINOHYDRO BUREAU 8 CO LTD

Collectors for recovering platinum group metals from spent catalysts, their preparation methods and applications

This invention provides a collector for recovering platinum group metals (PGMs) from spent catalysts, its preparation method, and its application, belonging to the technical field of precious metal recovery. The collector comprises a copper matrix, a flux, a framework support, and a lattice activator: the copper matrix, flux, and lattice activator are loaded on the surface of the framework support; the copper matrix is ​​elemental copper or a copper-based compound; the flux is boric acid or a borate; the framework support is a porous inorganic material; and the lattice activator is tin, a tin alloy, or a metal sulfide. The collector serves as a collector for the pyrometallurgical recovery of PGMs from spent catalysts. This invention constructs a multi-component synergistic collector composed of a copper matrix, flux, framework support, and lattice activator, which significantly improves the recovery rate of PGMs, especially rhodium, from spent automotive exhaust purification catalysts in pyrometallurgical treatment, and reduces the smelting temperature required for pyrometallurgical treatment, thus significantly reducing energy consumption.
Owner:JIANGXI JUNXIN PRECIOUS METAL TECH MATERIAL CO LTD +1

High-precision battery residual capacity detection method, detection system and detection device

The invention discloses a high-precision battery residual capacity detection method, system and device, and the method comprises the steps: S1, testing the AC impedance data of a plurality of batteries, and drawing an AC impedance spectrum; s2, obtaining the real residual capacity of the plurality of batteries; s3, utilizing the composite neural network prediction model to construct an evaluation model of the alternating current impedance presumption residual capacity; and S4, obtaining the residual capacity of the to-be-tested battery according to the evaluation model. The detection system is used for implementing the method, and the detection device is used for obtaining the alternating-current impedance data in the S1 and the S4. According to the method, rapid and accurate capacity presumption of the retired power battery is realized, the problems of high deviation, high energy consumption and long time of battery residual capacity estimation by adopting a traditional detection method are avoided, and high accuracy and reproducibility of detection data are ensured.
Owner:HUNAN CLOUD STORAGE RECYCLING NEW ENERGY TECH CO LTD

Wind turbine blade manhole plate and manhole cover plate and preparation method and application thereof

The application relates to the field of wind power blades, and discloses a wind power blade manhole plate and manhole cover plate as well as a preparation method and application thereof. The method comprises the following steps: (1) mixing unsaturated polyester resin, a thickening agent, an initiator, a crosslinking agent, a low shrinkage agent, a release agent, a polymerization inhibitor, an inorganic filler and waste glass fibers, and then filling the mixture into a mold for preheating; (2) performing mold pressing on the preheated material to obtain a preformed material; and (3) performing heat treatment on the preformed material, and then performing demolding to obtain the wind power blade manhole plate and manhole cover plate. The method is prepared by creatively adopting a mold pressing forming method, and waste glass fibers are used as raw materials for preparation, so that the preparation cost is saved, and the preparation efficiency is improved.
Owner:GUODIAN UNITED POWER TECH

Method for determining the density of an ore to be mined

PendingCN122689574AImprove density calculation accuracyEliminate sampling bias
The application discloses a method for measuring density of ore to be mined, and relates to the technical field of mining and geological testing. The method comprises the following steps: preparing a comprehensive sample according to a selection ratio, performing multi-grain-level screening and calculating a yield; performing automatic mineralogy analysis on each grain-level sample, calculating overall mineral content and theoretical density; measuring sample porosity, and performing primary correction on the theoretical density; measuring actual measured density of the multi-region sample and the comprehensive sample, calculating a correction coefficient K, and performing secondary correction. The application solves the problem of mineral representation deviation by using grain-level yield weighting, solves the interference problem of structural defects and system deviation by using porosity and correction coefficient, significantly improves the accuracy of actual apparent density measurement of the ore, and is particularly suitable for rapid and accurate analysis of the density of the ore to be mined in a complex occurrence state, thereby providing reliable data support for mine ore matching, resource reserve estimation and ore dressing process design.
Owner:CHANGCHUN GOLD RES INST

Database fuzzing method based on write-copying

PendingCN122285528ASpeed ​​up the overall progress of fuzz testingSpeed ​​upDatabaseFast recovery
This invention relates to the field of database testing technology and discloses a database fuzzing method based on copy-on-write. The method includes: initializing a persistent layer to obtain a baseline storage state; creating a temporary layer and associating it with the persistent layer to form a union storage view; during test case execution, redirecting write operations to the temporary layer via copy-on-write, while read operations are read from either the temporary or persistent layer depending on whether the data exists; after testing, deleting and rebuilding the temporary layer to quickly restore the initial state; and repeating this process until all test cases are completed. This application constructs a two-layer storage structure consisting of a persistent layer and a temporary layer, recording all test changes in the temporary layer. After testing, only deleting and rebuilding the temporary layer is needed to quickly reset the repository, avoiding a complete initialization process and significantly improving the efficiency of database fuzzing.
Owner:CHINESE PEOPLES LIBERATION ARMY UNIT 61660

High-throughput detection method for determining fructose-6-phosphoric acid in cell matrix

The invention discloses a high-throughput detection method for determining fructose-6-phosphoric acid in a cell matrix, a sample is introduced into a mass spectrum through sound wave ejection based on a sound wave excitation mass spectrum technology for target compound detection and analysis, a carrier liquid of the sample is an alkaline carrier liquid, the sample ejection amount of sound wave ejection is 10-15 nL, and the sample ejection amount of the sound wave ejection is 10-15 nL; the ejection frequency of sound wave ejection is that the interval between every two samples is 1000-4000 milliseconds. According to the detection method provided by the invention, the analysis time can be shortened, the manpower and consumable cost can be saved, the operation is simple and convenient, and the high-throughput detection requirement can be met.
Owner:WUXI APPTEC (SHANGHAI) CO LTD +1

Annular double-T ventilation structure and device based on pore anisotropy

The invention provides an annular double-T ventilation structure and device based on pore anisotropy, and belongs to the technical field of grain storage. The annular double-T ventilation structure comprises an annular main air duct, two symmetrically-arranged air inlets and two T-shaped air ducts which are located in the annular main air duct and are in central symmetry; ventilation holes are formed in the walls of the annular main air duct and the T-shaped air duct, the T-shaped air duct comprises a longitudinal branch pipe and a transverse branch pipe, one end of the longitudinal branch pipe is connected with the air inlet, and the other end of the longitudinal branch pipe extends towards the center and is connected with the transverse branch pipe; a composite ventilation network with the outer ring and the inner T is formed, and the problem of ventilation blind areas in the center area of the bottom of the silo caused by pore anisotropy when wet grains containing impurities are stacked is effectively solved; the invention further provides a wet grain ventilation and cooling device comprising the ventilation structure, the ventilation uniformity of a grain pile can be remarkably improved, the grain temperature can be remarkably reduced, the wet grain ventilation and cooling device is suitable for rapid warehousing ventilation of high-impurity-content wet grains, strict cleaning is not needed, and time and cost are saved.
Owner:NANJING AGRI MECHANIZATION INST MIN OF AGRI

Culture medium for biosynthesis of indigoidine and application thereof

PendingCN122503246Ahigh purityAcetic acid concentration decreasedEscherichia coliIndigoidine
This invention discloses a culture medium for the biosynthesis of indigoidine and its application, belonging to the field of microbial fermentation and synthetic biology technology. Addressing the problems of low yield, insufficient precursor supply, byproduct accumulation, and poor scale-up stability in existing culture media for indigoidine fermentation, this invention provides a core culture medium system. This medium, per 1L, includes: 10-50g carbon source, 5-20g nitrogen source, 10-30g L-glutamine, and 0.1-20g inorganic salts, with optional addition of 0.1-20mL trace element salt solution and / or vitamin components. The pH is 6.0-7.5. The carbon source is selected from glucose, glycerol, sucrose, dextrin, or combinations thereof; the nitrogen source is selected from ammonium sulfate, yeast extract, peptone, or combinations thereof. This culture medium can significantly increase the yield of indigoidine synthesized by recombinant *E. coli* and effectively inhibit acetic acid accumulation. In a 5L fermenter, compared with LB medium, this medium can increase the indigoidine yield by at least 80% while reducing the acetic acid concentration in the fermentation broth by more than 60%, showing good prospects for industrial application.
Owner:HANGZHOU BOHUI HESHENG TECHNOLOGY CO LTD

Method for measuring potential difference of diffusion layer in solid-liquid interface double electric layer

The invention provides a method for measuring the potential difference of a diffusion layer in a solid-liquid interface double electric layer, and belongs to the technical field of corrosion protection, the potential difference # imgabs0 # of the diffusion layer is calculated by adopting the following formula: # imgabs1 #, alpha is a charge transfer coefficient, alpha * is a charge transfer coefficient in a non-ideal state, n is the charge gain and loss number of redox reaction, # imgabs2 # and # imgabs3 # are electrode potential, and # imgabs1 # and # imgabs2 # are electrode potential. # imgabs4 is a relative charge when the electrode is in equilibrium potential and zO is in an oxidation state. By means of the method, the potential difference of the diffusion layer can be successfully measured on the surfaces of metal materials such as steel and titanium alloy.
Owner:UNIV OF SCI & TECH BEIJING

A fluorescence emission-independent excitation carbon quantum dot and its preparation method

PendingCN122080924AGood orientationConducive to polycondensationNanoopticsNano-carbonAir atmosphereFreeze-drying
This invention discloses a fluorescence emission-independent excitation carbon quantum dots and its preparation method. The method includes: Step 1, mixing o-phenylenediamine and boric acid at a molar ratio of 4 mmol:(1.2~4 mmol), grinding the mixture, transferring it to a square ceramic boat, and placing it in an oven. Under air atmosphere, the temperature is increased from room temperature to 100~135℃ at a heating rate of 5℃ / min, and the solid-phase reaction is carried out for 4~6 h. The mixture is then naturally cooled to room temperature to obtain a brownish-red solid; Step 2, dissolving the brownish-red solid in deionized water and sonicating it to obtain a yellowish-brown liquid; Step 3, filtering the yellowish-brown liquid to obtain a pure carbon quantum dot aqueous solution; Step 4, freeze-drying the carbon quantum dot aqueous solution to obtain carbon quantum dot powder. This invention simplifies the process flow, reduces energy consumption and post-processing complexity, and provides controllable reaction process. The prepared carbon quantum dots exhibit fluorescence emission-independent characteristics and long-wavelength orange fluorescence.
Owner:XIJING UNIV

High-efficiency stable Pt-based catalyst for dehydrogenation of n-octane and preparation method of high-efficiency stable Pt-based catalyst

PendingCN121797308AEnsure consistencyguaranteed reproducibilityMolecular sieve catalystsHydrocarbonsPtru catalystN octane
The invention discloses a high-efficiency stable Pt-based catalyst for dehydrogenation of n-octane and a preparation method of the high-efficiency stable Pt-based catalyst, and belongs to the technical field of catalysis. The catalyst takes aluminum oxide, silicon dioxide or a Silicalite-1 molecular sieve as a carrier, and active components comprise a main active component platinum and three functional aids, wherein the first aid is at least one of lanthanum, cerium and zirconium, the second aid is at least one of zinc, copper, tin and manganese, and the third aid is at least one of potassium, sodium, calcium and magnesium. The preparation method comprises the following steps: sequentially loading the components on the carrier by adopting a step-by-step impregnation process, and carrying out ultrasonic treatment, drying and roasting to obtain the catalyst. The catalyst has high catalytic activity, high octene selectivity (more than 70%), low cracking byproduct selectivity (less than 3%) and excellent long-term operation stability in the dehydrogenation reaction of n-octane through the synergistic effect of multiple components, and the preparation process is simple and controllable and is easy for industrial production.
Owner:LANZHOU INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES

A rapid detection system and method for aroma concentration in flavor-enhancing cigarettes

PendingCN122084838AStrong sensory connectionSolve the problem of poor processing reproducibilityWithdrawing sample devicesPreparing sample for investigationProcess engineeringAroma aroma
This invention relates to the field of tobacco product quality testing, and more particularly to a rapid detection system and method for aroma concentration in flavor-enhancing cigarettes. The detection system includes a carrier gas supply module, an aroma sampling module, and a gas detection module connected sequentially along a gas path. The carrier gas supply module is used to adjust a first preset parameter value to provide a target clean carrier gas. The aroma sampling module is used to drive the target clean carrier gas to flow through the sample to be tested at a second preset parameter value, generating an aroma-carrying gas. The gas detection module is used to detect the concentration of the target aroma substance in the aroma-carrying gas. This invention can highly simulate the real smoking environment and achieve standardized gas generation and collection, thereby providing stable, reliable, and sensorily correlated gaseous samples for rapid detectors such as PID, and achieving efficient and accurate evaluation of the aroma concentration consistency of flavor-enhancing cigarette products.
Owner:WUHAN DAHUI NEW TECH CO LTD

A clamped structure prosthetic heart valve

A clamping structure artificial heart valve comprises a first valve seat body, a second valve seat body and artificial valve leaflets; the second valve seat body is arranged outside the first valve seat body, and the artificial valve leaflets are arranged between the first valve seat body and the second valve seat body; the second valve seat body is provided with a split line, the midpoint of the split line intersects with the central axis of the second valve seat body, and the split line divides the second valve seat body into two halves. The present application improves the symmetry of the whole artificial valve, avoids the influence of traditional sewing on the peripheral sewing edge part of the artificial valve leaflets, prolongs the service life of the artificial heart valve, ensures the replicability and quantitative production of the whole structure of the artificial valve, and improves the production efficiency.
Owner:NAT CENT FOR CARDIOVASCULAR DISEASES

A bio-based coordination type foam dust suppressant as well as a preparation method and application thereof

PendingCN122503085AEven and long-lasting coverageSolve the problem of difficult wetting
A bio-based coordination-type foam dust suppressant, its preparation method, and its application belong to the field of dust control technology. The bio-based coordination-type foam dust suppressant comprises the following components in parts by weight: 10-30 parts sodium alginate, 1-8 parts α-hydroxycarboxylate, 0.2-2 parts coordination intermediate stabilizer, 6-20 parts lauryl alcohol, 3-15 parts dodecyl vinyl ether, 2-5 parts ethylene glycol laurate, 1-2 parts isopropyl myristate, 2.5-10 parts dodecyl diethylene glycol ether, 1-10 parts dodecyl carboxylate, and 50-200 parts water. The bio-based coordination-type foam dust suppressant of this invention possesses coordination charge regulation capability, good biodegradability, and excellent foam stability, enabling efficient dust suppression.
Owner:SHANDONG DONGHUA TECH CO LTD

Gateway batch testing device and method and readable medium

The invention relates to the technical field of communication testing, in particular to a gateway batch testing device and method and a readable medium, and the testing device comprises a connection module which is used for connecting a plurality of gateway devices to be tested at the same time and providing an independent communication channel for each gateway device; the test task generation module is used for generating a plurality of test tasks according to a preset test scene; the batch test control module is used for controlling connection and initialization of a plurality of gateway devices and scheduling of test tasks; according to the invention, a plurality of gateway devices are simultaneously connected through the connection module, and an independent communication channel is provided for each device, so that the stability of a test environment and the independence of a test process are ensured, communication interference among the devices can be effectively avoided, and a reliable basis is provided for subsequent test task execution.
Owner:SHENZHEN HENGGUOLIAN CO LTD

A rapid detection method and system for the reheating degree of meat dishes based on electrochemical sensing

PendingCN122282892Afast outputaccurate outputFood safetyMeat dishes
This invention discloses a rapid detection method and system for the reheating degree of meat dishes based on electrochemical sensing, belonging to the field of food testing technology. Addressing the problem of difficulty in rapidly and accurately evaluating the reheating degree of meat dishes in existing technologies, this invention first places the meat dish to be tested in a space, generating headspace gas at a preset equilibrium temperature and time. An electrochemical sensor unit collects the complete time-response curve of the interaction between the headspace gas and the sensitive layer, extracting dynamic characteristic parameters such as response rise time, peak response value, time to reach peak value, curve integral area, and half-life of the fall phase. Simultaneously, it acquires ingredient attribute parameters and reheating method parameters. These parameters are then input into a pre-trained deep learning prediction model, which outputs the reheating degree level and displays it on a display unit. This method can be used in the catering industry, food processing, and home cooking for rapid detection of the reheating degree of meat dishes, ensuring food quality and food safety.
Owner:INST OF AGRO FOOD SCI & TECH CHINESE ACADEMY OF AGRI SCI +1

Gradient silicon nitride ceramic femoral head prosthesis and preparation method

PendingCN122272890Areduce frictionreduce wearHigh fractureFemoral head prosthesis
This invention provides a gradient silicon nitride ceramic femoral head prosthesis and its preparation method, relating to the technical fields of clinical medicine and biomaterials. The femoral head prosthesis is prepared from 88-94 parts of silicon nitride powder, 4-12 parts of sintering aid, 5-20 parts of tungsten carbide titanium, and 0-30 parts of pore-forming agent, wherein the pore-forming agent cannot be 0 parts. The gradient silicon nitride ceramic femoral head prosthesis of this invention retains the advantages of silicon nitride ceramics—low wear, low friction, high strength, high fracture toughness, and good chemical stability—at the interface between the femoral head prosthesis and the liner, while reducing wear on the titanium alloy femoral stem cone caused by the large hardness difference between the femoral head prosthesis and the liner. This reduces the incidence of organ toxicity, periprosthetic osteolysis, and aseptic loosening caused by metal wear debris, improves the survival rate of the femoral head prosthesis and the femoral stem cone, reduces the revision rate of replacement surgery, and saves patients' treatment costs.
Owner:FIRST HOSPITAL AFFILIATED TO GENERAL HOSPITAL OF PLA

Hydrophilic aluminum foil dry and wet hydrophilic angle pretreatment testing device

The utility model belongs to the technical field of hydrophilic aluminum foil performance testing, and particularly relates to a hydrophilic aluminum foil dry and wet hydrophilic angle pretreatment testing device which mainly comprises a temperature and humidity box, a liquid storage tank, a stepping motor, a motor controller, a transmission device and a sample holder. And a stepping motor is arranged at the top of the temperature and humidity box and is connected with the sample holder through a transmission device via the test hole. The liquid storage tank is arranged in the temperature and humidity box, and the stepping motor below the sample holder is connected with the motor controller through a control line. The device ensures that the whole experiment is carried out in an environment in which the temperature and humidity conditions are accurately controlled, and ensures the accuracy and reproducibility of the experiment conditions; the device is compact in structure and convenient to use, and the test environment control part and the dry-wet infiltration part are relatively independent and can be independently used under different test requirements.
Owner:GUOBIAO BEIJING TESTING & CERTIFICATION CO LTD

Preparation method of photocatalyst material

The invention discloses a preparation method of a photocatalyst material, and belongs to the technical field of material preparation and pollution treatment. The method comprises the following steps: by taking bismuth citrate as a multifunctional precursor, firstly mixing the bismuth citrate with a titanium source, a manganese source and a cerium source in a solvent for gelation, then carrying out solvothermal reaction to form an intermediate, and finally carrying out programmed temperature control pyrolysis in an inert and oxygen-containing atmosphere. In the pyrolysis process, carbon element doping and manganese and cerium bimetal ion lattice embedding are synchronously realized, and a graded porous folded structure is constructed in situ by utilizing precursor decomposition gas. The method integrally solves the problems of weak visible light response, low mass transfer efficiency and poor stability of a traditional material, and the prepared material shows efficient inhibition and degradation efficiency on mold such as aspergillus flavus under simulated granary low-illumination visible light.
Owner:FENMING TECH (SHENZHEN) CO LTD

Micro-area variable angle grazing incidence wide-angle scattering test method

The present invention proposes a micro-area variable angle grazing incidence wide-angle scattering test method based on a single crystal X-ray diffractometer, including preparing a sample of a test material deposited on a substrate and placing it on an improved sample holder, the improved sample holder having a specific structure and a driver for controlling the incident angle, etc.; selecting an X-ray light source and aligning it with the sample, using a copper target and a molybdenum target for switching and matching; performing a Z-scan scan and a tilt scan along the optical path direction and perpendicular to the optical path direction, and setting relevant parameters; collecting the scattered X-rays through a two-dimensional surface detector; and finally obtaining a related graph through software integration. The table size, scanning parameters, etc. of the improved sample holder have specific requirements, and a height reference position, an adjustment structure, etc. are also provided, and the connection part is installed on the equipment sample table by screwing. The present invention solves the problems of inaccurate control of the incident angle and height in the prior art, and improves the accuracy and reliability of the test.
Owner:WESTLAKE UNIV

A porous, fast-dissolving sugar-containing dialysis powder and a method for preparing the porous, fast-dissolving sugar-containing dialysis powder based on freeze-drying spray.

PendingCN122075529Alow bulk densityreduce shipping weightPowder deliveryOrganic active ingredientsFreeze-dryingPhysical chemistry
This invention belongs to the field of dialysis powder preparation, specifically relating to a porous, fast-dissolving sugar-containing dialysis powder and a method for preparing the porous, fast-dissolving sugar-containing dialysis powder based on freeze-drying spray. The method includes the following steps: (1) concentrating the sugar-containing dialysis solution to obtain a concentrated solution; (2) atomizing the concentrated solution and freezing the resulting atomized droplets to obtain solid ice crystal particles; (3) sublimating and drying the solid ice crystal particles under reduced pressure to obtain the porous, fast-dissolving sugar-containing dialysis powder. This dialysis powder is prepared using a specific freeze-drying spray technology, possessing the characteristics of porous particles, uniform composition, and rapid dissolution, while significantly reducing transportation volume and cost.
Owner:SICHUAN UNIV

Construction method and application of chelidonium majus sample specific chromatogram

ActiveCN119643725Aguaranteed reproducibilityreduce lossComponent separationMedicinal herbsFormulary
The invention provides a construction method and application of a chelidonium album sample specific chromatogram, the method adopts ultrahigh performance liquid chromatography to establish the specific chromatogram of chelidonium album formula granules or upstream raw materials thereof, and the method comprises the following specific steps: preparation of a test solution, preparation of a reference medicinal material solution, preparation of a reference substance solution and acquisition of the specific chromatogram. The specific chromatogram construction method provided by the invention makes up the vacancy of research on water-soluble components of the chelidonium majus, and the method is simple and convenient to operate, short in analysis period, good in common peak separation degree and stable in baseline, and provides a new analysis means for quality control of the chelidonium majus formula granules.
Owner:JIANGYIN TIANJIANG PHARMA