34results about How to "Avoid discreteness" patented technology

The invention relates to a probability statistical analysis method for solving non-uniqueness of dam concrete mechanical parameter inversion, which comprises the following steps: step 1, separating measured water pressure displacement component; 2, for a plurality of sets of value of parameters to be inverted; 3, obtaining the calculated relative displacement under the action of the water level attwo different times before and after a certain calculation work condition; 4, obtaining a trained neural network model; 5, obtaining the corresponding mechanical parameter inversion value under the selected calculation condition; 6: getting the rest n-1 group of inversion values of corresponding mechanical parameters at different water levels under different computational conditions; 7: determining the final mechanical parameter inversion value with 80% guarantee rate, so as to solve the non-uniqueness problem of multi-parameter inversion. The invention provides a probability statistical analysis method for solving the non-uniqueness of dam concrete mechanics parameter inversion, which can overcome the defect that the mechanics parameter inversion value has great difference under different calculation conditions and different initial values.

A method for measuring the penetration quantity of a rubber membrane in large-scale triaxial test of coarse-grained soil belongs to the technical field of geotechnical tests. The measurement method ischaracterized in that a small confining pressure cyclic loading process is arranged in a conventional isotonic consolidation test, the volume variation quantity of a recoverable sample under a smallconfining pressure increment condition under different confining pressures is measured, and the measurement of the penetration quantity of the rubber membrane and the change law of the penetration quality with the confining pressure is realized based on the penetration recoverability of the rubber membrane. The measuring method is easy to implement in a conventional triaxial apparatus, has the advantages of simple operating steps and low difficulty, can be coupled to a conventional consolidation test process without affecting subsequent test, avoids the links of a development device, multi-time sample production and multi-group test in some measuring methods, effectively eliminates the influences of the individual discreteness of the sample, can accurately measure the penetration quantityof the rubber membrane changing with the confining pressure, provides a reliable technical way for correcting the volume deformation of the coarse-grained soil sample in the triaxial test, promotes the study of the mechanical properties and the constitutive model of he coarse-grained soil, and has good promotion values.

The present invention relates to a method for analyzing the collapse of a multi-story RC frame structure under the earthquake. The method is characterized in that: without dividing the earthquake action through the seismic intensity level, based on the component coefficient of the seismic effect of the component, the importance of each component of the frame is embodied, and the collapse failure criterion of the structure is defined; and the thinking of reverse analysis is used, the solution of seismic characteristic quantities can be obtained through the collapse critical state of the structure, so that a characteristic quantity solution set of the collapse of the RC frame structure can be obtained, and the collapse of the structure under the earthquake can be analyzed and determined to realize the earthquake vulnerability analysis process.

The embodiment of the invention discloses a linear motor, and the linear motor comprises: a shell; and a vibration unit and at least two displacement determining assemblies, wherein the vibration unitand the at least two displacement determining assemblies are located in the shell, each displacement determining assembly comprises an induction coil and a first magnet, each displacement determiningassembly is arranged along two opposite sides of the vibration direction of the vibration unit, and when the vibration unit vibrates, the induction coil and the first magnet act together to generatean induction current for determining the displacement of the vibration unit in the vibration direction. The embodiment of the invention further discloses a control method of the linear motor, a driving circuit and electronic equipment.

The invention relates to an integrated circuit substrate. The substrate comprises a copper coated core board, wherein the circuit function of the integrated circuit package substrate is favorably improved or extended by forming an annular groove for accommodating a magnetic ring in the copper coated core board, i.e., a micro transformer can be integrated in the integrated circuit substrate by winding connection on via holes which are internally and externally distributed along the magnetic ring, the copper coated core board is characterized by comprising a substrate body, the substrate body comprises the copper coated core board, the copper coated core board comprises a core board, an upper copper coated layer and a lower copper coated layer, the upper copper coated layer is combined with a surface of the core board, the lower copper coated layer is combined with a bottom surface of the core board, the annular groove is formed in the core board and is provided with an opening facing upwards, and the opening extends out of the upper copper coated layer.

The invention discloses an automatic centering device and a using method thereof. The automatic centering device is characterized in that: a displacement loading mechanism is arranged at an elevator mechanism; a power loading mechanism is arranged on the upper part of the displacement loading mechanism; the position of the displacement loading mechanism close to the center is provided with a vertical machine frame; a loading head is arranged at the lower end of the vertical machine frame; a centering industrial camera is arranged in the vertical machine frame on the upper part of the loading head; a torque sensor is arranged in the vertical machine frame on the upper part of the centering industrial camera; and a centering mechanism is arranged at the vertical machine frame on the lateralpart of the centering industrial camera. In the automatic centering device, image detection data is transmitted to a computer and is subjected to high-speed processing by utilizing high-precision industrial image equipment, so that the high-efficiency, high-precision and full-automatic centering operation is realized by matching with special processing software. The automatic centering device hasa reasonable and reliable integral structure, improves the accuracy and precision of tests and the reliability of test data, avoids the discreteness of centering indeterminacy and reduces error caused by artificial operation.

The present invention discloses a temperature calibration and measurement method of baby incubators. The method comprises the steps: setting a first standard thermometer at a position A 10 cm above acenter of a baby bed surface in a baby incubator and setting a second standard thermometer at a position B of a temperature measurement sensor in the baby incubator; closing a heating system of the baby incubator and simultaneously reading a measurement value t1 of the temperature measurement sensor, a measurement value TA1 of the first standard thermometer and a measurement value of the second standard thermometer by a controller; starting the heating system of the baby incubator, simultaneously reading a measurement value t2 of the temperature measurement sensor, a measurement value TA2 of the first standard thermometer, a measurement value TB2 of the second standard thermometer and a heating power value P by the controller, and calculating a slope Kb and a temperature correction coefficient K of the temperature measurement sensor; and in actual application measurement, calculating a B point temperature representation value TBn and an A point actual temperature value TAn at any moment by the controller and conducting outputting and displaying. The temperature calibration and measurement method effectively improves temperature measurement precision in the baby incubator.

The invention relates to the technical filed of measurement and value transfer, in particular to a measuring table( A level) for the rotation speed characteristic of a torque rotation speed measuring device which measures the rotation speed characteristic of various torque rotation speed measuring devices( B level). The rotating speed and the certain position are accurately controlled through a computer and a digital servo system. The invention has the advantages of increasing the accuracy and precision of the measurement and the reliability of the measured data by utilizing various Windows application programs, avoiding the uncertain discreteness of the system, decreasing the errors caused by a manual operation, and favoring the research on the torque measurement.

The invention relates to the technical filed of measurement and value transfer, in particular to a digital torque measuring and loading device which can measure various torque measuring devices. A PC computer or a portable PC computer controls an AC digital servo system. With the technical proposal, the invention solves the problems of being not firm enough of the connection mode, too lower standardized degree, poor reproducibility of the measuring process and relatively large error of the systematical operation of the prior measuring method; and the invention is characterized in that the torque is sampled directly through a motor; the digital torque measuring and loading device adopts a speed, position and intelligent three-shaft positioning system and implements SPC image data conversion analysis; and the invention adopts a network real time filed monitoring and measuring data transmission system to satisfy the requirements of modern diverse measuring technology and to program visual programming software. The invention has the advantages of quickly developing various application programs and WINDOWS type operation interface, increasing the accuracy and precision of the measurement and the reliability of the measured data by utilizing various WINDOWS application programs, avoiding the uncertain discreteness of the system, decreasing the errors caused by manual operation, and being beneficial for the research on the torque measurement.

The invention discloses a method for evaluating the disturbance degree of an undisturbed hollow cylindrical sample of residual soil. The method comprises the following steps: A, taking a blocky sample and calculating the void ratio of an in-situ state soil sample; b, preparing an undisturbed hollow cylinder sample and loading the sample: cutting the undisturbed hollow cylinder sample, sleeving the sample with a rubber membrane, and mounting the sample on a hollow cylinder torsional shear apparatus; c, sample saturation: simultaneously increasing the inner confining pressure, the outer confining pressure and the back pressure from zero; d, sample consolidation: keeping the back pressure at 500kPa, gradually increasing the inner confining pressure and the outer confining pressure from 520kPa, and completing consolidation; e, calculating a disturbance index DI according to the drainage volume delta V, the sample size and the in-situ state soil sample void ratio in the consolidation process; f, evaluating the disturbance degree of the sample: evaluating the disturbance degree of the sample according to the DI value; g, sample shearing, unloading and instrument cleaning, wherein after evaluation is completed, the sample is the sample with small disturbance or extremely small disturbance. The method is easy to implement, simple and convenient to operate, low in test cost, high in test precision and high in evaluation efficiency.

The invention discloses a rock tensile strength measuring device and a measuring method. The device comprises a lower seat, an upper seat, a lower pressure-resistant block, an upper pressure-resistantblock, a force application mechanism and a displacement sensor; the force application mechanism comprises a cylinder sleeve and a piston rod, the cylinder sleeve is arranged in the lower pressure-resistant block, a high-pressure cavity is formed between the bottom of the cylinder sleeve and the lower pressure-resistant block, and the top end of the piston rod extends out of the cylinder sleeve tomake contact with the upper pressure-resistant block; one side of the upper seat is connected with the upper pressing block, and a tensioning reset mechanism is arranged between the lower seat and the upper seat and/or between the lower pressure-resistant block and the upper pressure-resistant block. The lower seat is connected with the lower pressure resistant block through a high-pressure connector, an output port of the high-pressure connector is communicated with the high-pressure cavity; fluid is input from the high-pressure connector to drive the piston rod to move so as to realize external expansion of the lower pressure-resistant block and the upper pressure-resistant block, so that a rock sample to be tested is subjected to tension damage. The rock sample to be tested cracks fromthe separation part of the upper pressure-resistant block and the lower pressure-resistant block, and the cracking position of the test is controllable, so that the repeatability of the test is ensured.