614results about How to "The experimental results are accurate" patented technology

The invention relates to an ammunition overload detection device, and in particular relates to an overload test and detection device of a gas gun, wherein the device provided by the invention can be used for solving the technical problems such as inconvenience in operation and use and the like of the existing air gun penetration test device. The overload test and detection device of the gas gun comprises a frame body which is provided with an overload test air gun launching device, a charging overload test bomb, an overload test protective box and an overload test target plate replacement device. Comprehensively, compared with the prior art, in the technical scheme provided by the invention, the target plate replacement device for an overload test, the overload test protective box and a small-size penetration test bomb are designed specially for the small-size charging and priming system air gun overload performance test, principles and methods relevant to the mechanical design are utilized, the design scheme has the characteristics of being vigorous, practicable, convenient and the like, and the overload test and detection device has the advantages of favorable practical value, reliable operability and accurate experiment result.

The invention discloses an LSTM and SAE-based telephone voice emotion analysis and recognition method; according to the method, voice information is subjected to a series of preprocessing of sampling,quantifying, pre-emphasis, framing, windowing and the like, and then fast fourier transformation is carried out on the voice information to obtain frequency domain characteristics of the voice information, and next, the voice characteristic parameters MFCC are extracted. By adoption of the method, an LSTM+ SAE neural network model is established to train the extracted MFCC characteristic parameters to obtain depth characteristic information of voice signals; the classification accuracy is obtained by combining a full-connection layer and a softmax regression algorithm, and model training is completed; and finally, the MFCC characteristic parameters to be tested are input into a trained model, emotion analysis is carried out on the telephone voice, and the emotion of a speaker is judged.

The invention provides a method for preparing a rock core for shale experiments. The method includes the following steps that 1, drilling is conducted on actual stratum shale or outcrop rock to obtain a rock core column;2, crack making is conducted on the rock core column; 3, according to the thickness of a crack which needs to be simulated, a plurality of sheet-shaped objects with the same thickness are made, and the sheet-shaped objects are uniformly arranged on the surface of the crack; 4, the rock core column is folded and sealed by gel; 5, a wrapping layer capable of completely sealing the rock core column is wrapped outside the rock core column, and a rock core to be tested is prepared; 6, holedrilling is conducted on the upper and lower ends, in the extension direction of the crack, of the rock core to be tested till the end faces of the rock core column are exposed. By the adoption of the method, intrinsic structural features of the shale and wall-surface features of the crack under actual stratum conditions can be actually reproduced, so that results of crack plugging experiments are more accurate; the solidified wrapping layer and the rock core (column) are tightly wrapped, and when the experiments are conducted, results cannot be influenced by the generation of pressure penetration.

The invention discloses a new method for screening an anti-liver injury medicament by using a model organism zebra fish. The method comprises the following steps: continuously molding the zebra fish serving as a molding object for 3 days by using preferred carbon tetrachloride at the concentration of 1mmol/L to obtain the zebra fish of a liver injury model, and then evaluating the anti-liver injury activity of different receptor medicaments by using ALT and AST levels in the liver tissue of the zebra fish and the pathological change condition of the liver tissue of the zebra fish. Experimental results show that the new method for screening the anti-liver injury medicament by using the model organism zebra fish has high molding success rate, can simulate an in vivo environment to perform quick screening, and has the advantages of strong operability, accurate experimental results, little amount of required reacceptance medicament, strong repeatability, low cost, wide application range, capability of performing batch screening experiments and high work efficiency.

The invention discloses a rapid screening method for drought-enduring variety of rice at seedling stage, comprising the following steps that: after soil drought processing and drought processing simulated by polyethylene glycol (PEG), variety with strong drought tolerance in two processing methods is screened out. By simultaneously performing soil drought and drought simulated by PEG and conjointly analyzing the result, the defects of two drought processing methods can be simultaneously avoided and the advantages of two methods can be exploited to the full. Thus, the experimental result is accurate and the results of the studies of breeding, group construction, gene mapping and the like of the drought-enduring variety and drought-sensitive variety which are screened out are more credible, and the time and the expenditure of researchers are saved.

The invention discloses a food safety risk supervision mobile laboratory. The mobile laboratory provided by the invention comprises an engineering truck, wherein at least one electric leg which can be contracted to the ground is arranged at the bottom of a coach of the engineering vehicle; and a food detection related instrument is arranged in the coach of the engineering truck. The laboratory combines the detection analysis function of the traditional biological and a chemical laboratory with mobility and convenience of large engineering trucks, can supervise food safety in real time, has the advantages of strong maneuverability, high-end equipment, complete detection items, greenness and environmental protection, self-sufficiency of water, electricity and gas and the like, and can deal with field test tasks of various national-grade large activities and food safety emergency incidents.

The invention discloses a load-adjustable anti-loosening performance evaluation and detection device for electric power fasteners. The device comprises a vibration main unit, a servo hydraulic system, a microcomputer and an electrical control system, the vibration main unit comprises a frame and a servo oil cylinder connected on one side of the frame, a piston rod of the servo oil cylinder is connected with a force transducer, the force transducer is connected with a connecting seat and a pulling plate, a through hole for a testing screw to pass through is arranged in the middle of the pulling plate, and a support plate is connected on the other side of the frame and movably connected below the pulling plate. Vibration load of the anti-loosening performance evaluation and detection device can be adjusted according to practical application occasions and borne vibration load characteristics of the electric power fasteners, so that evaluation and detection for the anti-loosening performance of the fasteners in connection are achieved.

The invention discloses a Langmuir multi-probe control circuit used for plasma diagnosis and belongs to the technical field of plasma diagnosis. The control circuit is located outside a plasma device and comprises three Langmuir single-probes, an alternating-current sawtooth wave supply voltage generation device, a direct-current supply voltage generation device, a double-pole-double-throw switch, a reversing switch, a first double-pole-three-throw switch, a second double-pole-three-throw switch, a first single-pole-single-throw switch, a second single-pole-single-throw switch and a transform resistor. Selection of the Langmuir single-probes, a double-probe, and a three-probe in different diagnosis circuits is carried out through switching-over of the switches in control circuits, and a cleaning circuit is provided for cleaning of the probes. According to the Langmuir multi-probe control circuit used for the plasma diagnosis, similarities of three probe diagnosis methods on an experimental instrument are used, experimental cost can be saved, different methods can be used by switching-over of the control circuits due to the fact that difference of the three probe diagnosis methods are combined, convenience and high efficiency are achieved, experimental period is greatly shortened, and experimental results are enabled to be accurate due to the fact that the probes can be cleaned during experiment.

The present invention relates to a wind tunnel for researching snow drift. The wind tunnel comprises a cave body, an environment simulation device arranged inside the cave body, a measurement controlsystem and a driving device. Through an installation rod movably arranged in the cave body, an installation plate which is provided with a spraying head is connected, and the translation and rotationof the installation plate are realized. Through the movable installation plate and a fan set arranged in a matrix, the simulation of a complicated snowfall field and a complex wind field can be realized, thus the relation between a building roof structure and building distribution in a building group and the snow drift under a wind field effect is researched, and wind tunnel plays a guiding role in architectural design and urban planning in an area with heavy snowfall.

The invention discloses a method for measuring the blending uniformity of cigarette cut tobacco. The method is characterized by comprising the following steps: within the production time of one batch,taking flavored blended cut tobacco to carry out thermal weight loss testing five times at same intervals, calculating the similarity between every two obtained sample thermal weight loss TG curves and the variable coefficient between the similarities, and thus measuring the blending uniformity of cigarette cut tobacco. A thermal gravimetric analyzer is creatively used for the measurement of theblending uniformity of cigarette cut tobacco, the used equipment and operation treatment are simple, and neither tracer nor chemical reagent is needed; the quantity of the required sample in small; the method is quantitatively described and objective and accurate in experimental result; according to method principle, the method is applicable for any blending system.

The invention provides a non-contact indirect measuring method for thickness of a Fresnel biprism. The non-contact indirect measuring method comprises the steps of measuring refractivity of the Fresnel biprism in a minimum deviation angle method and a refraction law method through measuring the wedge angle of the Fresnel biprism; and measuring the thickness of the Fresnel biprism in a non-contact manner by means of a statistical method. Under an experiment background of measuring the wavelength of natrium yellow light, through continuously changing the position of the biprism, the fringe spacings at different positions are recorded, and a linear relationship between the position and the fringe spacing is simulated, thereby calculating the thickness of the Fresnel biprism. The non-contact indirect measuring method can realize easy measurement for the thicknes of an easy-damage optical lens on condition that a requirement of no damage is satisfied.

The invention discloses a multifunctional impact experiment platform and method capable of continuously applying an axial force. The device comprises seven parts including a rigid support, a fixed end, a sliding end, a sliding assembly, a loading assembly, a hydraulic assembly and a data acquisition assembly and is characterized in that an annular spring is assembled on a jack between the sliding end and the hydraulic assembly; pressure is pre-applied to a test piece through a compression spring; in an impact experiment, the spring is gradually stretched and the axial force is reduced; an axial force gradually weakening process of an axial pressure component is really simulated under an impact or explosion load effect; four inner thread bolt holes are pre-formed in the bottom of the sliding end; after the sliding end is fixedly connected with the rigid support, a failure process of a bent component under an impact load can be simulated; and the multifunctional impact experiment platform and method have the advantages that the whole structure is simple and compact and experiment operation is simple and convenient.

The invention discloses a measurement method for the influence of residual stress on bolt connection structure clamping force attenuation. A device for realizing the method includes: a tensile testingmachine, a lower connecting piece, a nut, an eddy current displacement sensor, an upper connecting piece, a bolt, a pressure sensor, and a corresponding sensor data acquisition system and a computer,a 3D surface morphology measurement instrument, a digital display torque wrench, a vibration table, and an X ray residual stress tester. The 3D surface morphology measurement instrument is employed to acquire the three-dimensional morphology of a contact surface, vibratory stress relief process and the X ray residual stress tester are employed to acquire bolts that are made of a same material andhave different levels of residual stress, the tensile testing machine, the pressure sensor and the displacement sensor are combined to collect the data under the circumstances of a same pretighteningforce and specific amplitude circulating alternating load. The method can achieve quantitative analysis of the relationship between the two structures, provides the experimental basis for further study of the influence of residual stress on bolt connection structure clamping force attenuation, and has the characteristics of simple and quick operation and accurate measurement.

The invention discloses a method for quickly detecting a crosslinked polyethylene cable insulating material structure. The method has the characteristics that: crystallinity, wafer thickness and distribution of a crosslinked polyethylene cable material are detected by a thermal fractionation method; elasticity modulus and entanglement density of the crosslinked polyethylene cable material at a high temperature are detected by a dynamic mechanical method; and a simple and effective method for detecting the crosslinked polyethylene cable insulating material structure is provided by synthesizing the thermal fractionation method and the dynamic mechanical method. By the method, theoretical basis is provided to improve a polymerization process of a polyethylene basic material and adjust a formula of the polyethylene cable insulating material. The method is simple and convenient in test process, sensitive and accurate in result and high in repeatability.

The invention discloses an efficient fruit fly neural network Hash search method for WMSN data, and the method comprises the steps: firstly, carrying out the preprocessing of a data set, enabling thecharacteristics of the data set to be converted into numerical data, and enabling the Fast Johnson-to be used for carrying out the Hash search of the WMSN data; the Lindenstrauss Transform (FJLT) projection matrix projects data to a measurement space with a higher dimension, so that the content similarity between original data objects is ensured, and accurate search is facilitated; and finally, awin-win characteristic selection strategy in a fruit fly olfactory neural local sensitive hashing method is adopted to reduce the dimension of the data set and improve the search efficiency. When thefruit fly olfactory nerves are used for simulating the locality sensitive hashing process, better universality is achieved, the accuracy of the search result is improved, the approximate neighbor query problem of high-dimensional big data is effectively solved, and the method is effectively applied to WMSN data search affairs based on a WMSN application system.

The invention discloses a rapid detection method and a device for ferrous oxide in sintered ores. The detection method comprises the following steps: subjecting a sample to a pre-treatment, establishing a standard curve between the sintered ore magnetic conductivity and the corresponding ferrous oxide content in the sintered ore, and finally substituting the measured sample magnetic conductivity into the standard curve between the sintered ore magnetic conductivity and the ferrous oxide content to calculate the concentration of ferrous oxide in the sinter ore sample. The device comprises a detection signal generating unit, the upper end of the iron core of the transformer of the detection signal generating unit is provided with a magnetic circuit disconnecting gap, the magnetic circuit disconnecting gap is provided with a sample measuring cavity, which is used to place an sintered ore sample and make the sample contact and connect to the iron core; a signal collecting unit is used to convert the collected voltage signals into magnetic conductivity signals and then transmits the magnetic conductivity signals to a signal processing unit, the signal processing unit is used to substitute the magnetic conductivity into the standard curve to calculate the ferrous oxide concentration of the sample, and the device has the advantages of low detection cost, rapid analysis speed, and accurate detection result.

Disclosed is a method for simultaneously preparing a pyromellitic acid and a terephthalic acid with coal serving as a raw material. The method includes firstly, adding potassium hydroxide, a coal sample and distilled water in a high pressure kettle to perform a reaction, cooling after the reaction to obtain an oxidation product, filtering and removing insoluble residues to obtain a filter liquor, acidizing the filter liquor by a concentrated sulfuric acid to enable a water soluble acid to be completely free, extracting a processed solution by butanone to obtain an extract liquor, subjecting the extract liquor to a vacuum evaporation to obtain a concentrate, recycling the butanone, subjecting the concentrate to a vacuum drying to obtain the water soluble acid, subjecting the water soluble acid to a selective decarboxylation in a mixed medium of an sulfuric acid, potassium acid sulfate and the distilled water to obtain the pyromellitic acid, adding coal acids and catalysts which remain after the preparation of the pyromellitic acid in a reacting kettle to perform a constant temperature isomerization reaction of the coal acids to obtain a filter liquor, cooling the filter liquor after the reaction, adjusting potential of hydrogen (pH) of the filter liquor by an diluted hydrochloric acid, precipitating the terephthalic acid in a sedimentation mode, filtering, washing and drying to obtain the refined terephthalic acid. By means of the method, the pyromellitic acid and the terephthalic acid can be simultaneously prepared, the reaction conditions are mild, conditions for devices are low, the terephthalic acid is a main product due to a high yield, and the pyromellitic acid is an auxiliary product.

The invention relates to a method for determining the solubility of a solid in supercritical ammonia, and an apparatus used thereby, and discloses the apparatus for determining the solubility of a supercritical ammonia system. The apparatus is composed of a cyclic balance sampling system and a sample analyzing system; and the cyclic balance sampling system comprises a balancing kettle and a sampling kettle which are two autoclaves, a circulating device, a needle valve and an oil bath pot. The sample analyzing system comprises a valve, a gas flow meter, an ammonia gas absorption bottle (gas collecting bottle) and a corresponding titration device. The invention also discloses the method for determining the solubility of the supercritical ammonia system by using the apparatus. A design idea in the invention is derived from the determination process of the solubility of a solution at normal temperature under normal pressure, that is, a saturated solution is measured, and the solubility of the system keeps unchanged in the operating process. The above static method for determining the solubility of the supercritical ammonia system avoids the disadvantages of valve obstruction and complex operation of present dynamic methods, and allows determination experiment data to be more accurate than data obtained through traditional static methods.

The invention discloses a method for identifying sugarcane germplasm resources. According to the method, SSR (Simple Sequence Repeats) molecular marker and CE (capillary electrophoresis) technique are combined, and fingerprint spectrums of 52 sugarcane varieties are established by utilizing 12 pairs of primers and are applied to identification of sugarcane germplasm, variety identification and protection. The specific method comprises the following steps: extracting genomic DNAs of different varieties of sugarcane, carrying out PCR (polymerase chain reaction) amplification, detecting amplification results by utilizing CE, establishing fingerprint spectrums of different sugarcane germplasms according different sizes of DNA strips and utilizing the fingerprint spectrums in the identification of germplasm resources. Compared with the conventional germplasm resource identification and biochemical detection, the method for identifying the sugarcane germplasm resources are not influenced by growth environment of plants and seasons and has the advantages that the resolution is high, the result is exact and reliable, the operation is simple, quick and direct, and the method is especially suitable for mass multiple-batch experimental data integration.

The invention discloses a simulation experiment table for a multi-flow-direction and flow distribution algorithm of a slope water current. The simulation experiment table comprises a square experiment table top, an adjusting device and a current collection trough, wherein the adjusting device is fixed below the experiment table top and comprises three telescopic supports used for supporting the experiment table top; the experiment table top is connected with the adjusting device through spherical hinges, the current collection trough is distributed in the periphery of the experiment table top in a surrounding mode, and the experiment table top and the current collection trough are of an integrated structure; the lengths of the three supports can be changed, and the supports are used for adjusting the experiment table top to be at a required direction angle; a soil layer with the thickness ranging from 10 cm to 15 cm is laid on the surface of the experiment table top, and vegetation distribution and stripe trends are simulated on the soil layer. Corners of the current collection trough are respectively provided with two drain holes. The simulation experiment table is simple in structure, low in manufacturing cost, easy and convenient to operated, capable of obtaining accurate experiment results, high in efficiency, and capable of being used for accurately simulating multiple flow directions of the slope water current in a drainage basin and simulating the situation of actual flow distribution in each flow direction.

The invention discloses a water-based heat-fluid-solid coupling true triaxial shear seepage test apparatus for coal body and a test method using the apparatus. According to the test apparatus, on the basis of the prior art, a true triaxial test box with a separated structure is employed, and two rubber pallets each possessing a special structure matched with the test box are employed, so that the simulation authenticity, accuracy and reliability are substantially improved during shear deformation operation of a test piece, and monitoring is facilitated. According to the test apparatus, because the to-be tested test piece is subjected to the force along the three axial directions of a stereo coordinate system, the test apparatus is a true triaxial shear seepage test apparatus in a real sense. Compared with the prior art, the test method using the test apparatus is high in simulation degree, and possesses the characteristics of true and accurate result, good reliability and the like.