51results about How to "The experiment takes a short time" patented technology

A method for calibrating a marine acoustic phase center relates to the field of marine surveying and mapping. It solves the problem that the existing acoustic phase center calibration method needs to perform water pool experiments to calibrate the acoustic phase center of the acoustic array in advance, and has the defects of long time-consuming experiments and low efficiency. The method of the present invention comprises the following steps: S1, making the operation ship sail around the seabed beacon according to the preset track, and collecting data, S2, using the data collected by S1 to calculate the coordinate matrix of the seabed beacon in the geodetic coordinate system and the installation of the acoustic matrix Position deviation D X ; S3, according to and D X , calculate the coordinates of each primitive on the acoustic matrix in the workboat coordinate system; S4, calculate the length of each baseline according to the coordinates of each primitive on the acoustic matrix in the workboat coordinate system, and calibrate the length of each primitive through the length of each baseline Acoustic phase center. The invention is mainly used for calibrating the acoustic phase center of the primitive.

The invention discloses a method for calculating dislocation density of a deformed crystal material based on a single diffraction peak. The method comprises the following steps of: utilizing a synchrotron radiation energy scanning X-ray diffraction technology to obtain an experimental intensity distribution curve of diffraction intensity of the deformed crystal material relative to a diffraction vector mode and a reference intensity distribution curve of diffraction intensity of a non-deformed crystal material relative to the diffraction vector mode; introducing a dimensionless variable M, andcalculating a standard intensity distribution curve of a diffraction peak after dislocation density normalization; calculating a specific M value of the experiment intensity distribution curve according to the experiment intensity distribution curve and the standard intensity distribution curve, and recording the specific M value as M'; and calculating the dislocation density of the deformed crystal material according to the full widths at half maximum of the experimental intensity distribution curve, the standard intensity distribution curve and the reference intensity distribution curve. The dislocation density of the deformed crystal material can be obtained by analyzing the intensity distribution curve of the single diffraction peak, and the experiment time is shortened.

The present invention provides a femtosecond time-resolved multi-channel phase-locked fluorescence spectrometer based on optical parameter amplification, including: a laser light source and a beam splitter; a sample excitation light generation part, which is used for frequency conversion of the fundamental frequency light output by the laser light source; The focusing device of the sample excitation light and the sample cell where the sample is fixed; the collection and convergence system of the sample fluorescence; the generation part of the pump light required for the fluorescence light parametric amplification; the optical parametric crystal, used for the non-collinear light generation of the pump light and the fluorescence Parametric process; time-resolved fluorescence spectrum data acquisition system; optical path delay system, used to change the time delay between optical parametric pump light and sample excitation light; data acquisition system is a data acquisition system based on a multi-channel lock-in amplifier. The invention can realize a single measurement to obtain a time-resolved fluorescence spectrum without hyperfluorescence background interference.

The invention relates to the technical field of sample fixing devices, and specifically relates to a sample fixing platform. The sample fixing platform comprises a base and a cylinder arranged on the base, wherein a plurality of sample placing positions are arranged at the upper end of the cylinder; and fixing parts for fixing samples are arranged on the sample placing positions. The invention also relates to a freeze scanning electron microscope containing the sample fixing platform. According to the sample fixing platform and the freeze scanning electron microscope containing the sample fixing platform provided by the invention, a plurality of fixing parts are arranged at the upper end of the cylinder, and a plurality of samples such as blades can be fixed simultaneously, so that the consumed time for experiments is short, the experiment efficiency is greatly improved, and the economic cost in the experimental process is also reduced.

The invention provides a microstructure parameter-based clay consolidation coefficient prediction method, which comprises the steps of: conducting clay consolidation experiments under different pressures, and measuring the void ratio according to conventional geotechnical experiments; calculating the consolidation coefficients of different consolidation experiments; employing a scanning electron microscope technique to obtain a microstructure photo of a corresponding sample section; carrying out granule area and void area segmentation on the clay microstructure photo, and extracting the information of granule unit sum, unit direction, total area, total circumference, and area ratio; analyzing the granules and establishing a main component expression with an accumulative contribution rate of over 95%; and establishing the relationship between the main components and the clay consolidation coefficient. The method provided in the invention links the consolidation coefficient of clay with its microstructure parameters to obtain corresponding consolidation coefficient indexes under different pressures according to the clay void ratio and micro-parameter main components. The method can effectively shorten the experiment time at a civil engineering investigation phase.

The invention relates to a high-precision electronic multi-activity isothermal-adsorption experimental apparatus. The experimental apparatus consists of an external case and a single-activity weighing unit and is characterized in that the external case comprises an isothermal water cycle temperature control system, adjustable foot pads, a glass door, a level gauge, a data recording system and a control panel; the isothermal water cycle temperature control system consists of a water tank, a temperature control component, an electric heating wire, a water pump, a water-circulation pipeline and a temperature control system; the single-activity weighing unit consists of a shell, high-precision electronic weighing units, a dynamic atmosphere circulator, a working area, a sample cabinet, a water cistern and a weighing bottle; the shell is a rectangular hollow shell, five high-precision electronic weighing units are arranged in the shell, and the sample cabinet and the water cistern are separately placed at an upper half part and a lower half part of the shell. According to the high-precision electronic multi-activity isothermal-adsorption experimental apparatus, an adsorption environment can be effectively controlled indoors, data of a plurality of samples of multiple activities are accurately and simultaneously measured and are continuously recorded under different temperatures, and a continuous sample quality changing process is obtained.

A coal caking index and gelatinous layer index rapid measurement method comprises the following steps: collecting spectral data of a calibration sample by using a laser-induced breakdown spectroscopysystem, and selecting spectral lines in two modes: 1, selecting related elements and spectral lines according to the physical background of coal properties; 2, establishing a regression equation amongthe caking index, the gelatinous layer index and the spectral line intensity by using a partial least square method, and selecting a partial spectral line with the lowest relative standard deviationof the regression coefficient; and then, establishing a partial least square calibration model by taking a union set of spectral lines selected by the two modes as input. For a sample to be detected,a laser-induced breakdown spectroscopy system is used for collecting spectral data, and the spectral data is substituted into the calibration model to obtain the caking index and the gelatinous layerindex of the sample. According to the method, the measurement accuracy is improved through a novel spectral line selection means, the measurement speed is obviously higher than that of a national standard method, and online and in-situ measurement can be achieved.

The invention provides a method for indirectly measuring the dry deposition velocity of PM2.5 on the surface of a plant. The method comprises the following steps: preparing simulated PM2.5 with the particle size of 2.5 [mu]m; determining the initial concentration and measurement time length of the PM2.5 in a smog chamber in a testing process, wherein a concentration time-varying rule of the PM2.5 is consistent with a stable exponential decaying rule; measuring concentration time-varying rules of the PM2.5 in the smog chamber under an empty condition and a condition of existence of a leaf sample respectively, and performing data fitting to calculate decaying velocity constants j and k of two curves respectively; calculating the dry deposition velocity Vd of the PM2.5 on the leaf sample to be measured according to formula (I) (specified in the original document) on the basis of the above data. According to the method, the formula obtained by observation data fitting is adopted for calculation, so that system errors can be greatly reduced, the measurement accuracy can be improved, and moreover, the method is low in experimental cost and experimental time consumption and more convenient and easier to operate.