127 results about "Ratio measurement" patented technology

The present invention provides a true-scale, coordinate-matched, linked in real-time, dual three-dimensional/two-dimensional visual display/viewer. The display simultaneously shows a 3D digital image and an associated 2D digital image of a selected drawing. The display of the present invention allows a user to visualize an asset's location, surrounding environment and hazards and true scale structural details for interior or external structural scenes. Using the display and associated tools, the user can obtain real-time information of an environment, true-scale measurement, plan ingress/egress paths, shortest paths between points and the number of doorways in a structure and track objects within the displayed environment. The intelligence gained using the tools and 3D/2D display may be used and further manipulated by a single user or may be distributed to other users.

The invention relates to globe positioning system GPS receiver technical field, in particular to a method for measuring the obscuration error of dual-frequency obscuration GPS receiver. The method uses two obscuration receivers in one antenna which are same object receivers, or one is provided with known measurement error, and another one is the object receiver, to use the two measurement errors of the two receivers to obtain the measurement error of the obscuration receiver. The method comprises that 1, the GPS signal via the antenna of the obscuration receivers receive real GPS signal, 2, setting the sample rate of the receivers, 3, analyzing the data of the two receivers, 4, calculating the high-load noise ratio measurement error and averaging, via the high-quality data, 5, calculating out the integral measurement error.

An apparatus and method (and related kit) for determination of the isotopic ratio of ¹³C to ¹²C in a gas sample containing carbon dioxide comprising introducing gas into a gas sample chamber, directing light into the sample chamber from a laser light source, the laser light source being capable of accessing one or more of the wavelength pairs 2054.37 and 2052.42; 2054.96 and 2051.67; or 2760.53 and 2760.08 nanometers, and with a detector detecting the laser light energy after passage through the sample chamber.

The invention discloses a stable isotopic abundance ratio real-time online monitoring device and a stable isotopic abundance ratio real-time online monitoring method. A wavelength scanning off-axis integrated cavity spectrum technology is utilized for performing precision measurement on isotopic abundance ratio of an object element, and the device comprises a laser device, a laser controller, a signal generator, an angle adjustable prism, a wavemeter, an off-axis integrated cavity, a temperature and pressure controller, a piezoelectric ceramic controller, an off-axis parabolic mirror, a photoelectric detector, a lock-in amplifier and a signal processing system for acquiring A/D (analog/digital) and terminal signals. The method disclosed by the invention is performed on the basis of the off-axis integrated cavity laser absorption spectrum technology and is further combined with wavelength scanning, cavity regulation, temperature, pressure and wavelength precision control technology, so that the stable isotopic abundance ratio real-time online monitoring can be realized, and trace gas concentration and isotopic abundance ratio measurement can be simultaneously performed; furthermore, the preparation of a sample is not required, so that the measurement frequency is greatly improved; and the device has the advantages of simplicity in operation, no need of calibration, almost no drift during a long period of time, good stability, low power, convenience in carrying, mounting and field experiments and large dynamic range.

The invention discloses a method for measuring the uranium isotope ratio of a single particle by SEM-ICP-MS. The method comprises the following steps: (1) preparation of a uranium particle sample; (2) search, identification and transfer of the uranium particle; (3) Dissolution of uranium particles; (4) determination of uranium isotope ratio, described step (3) is to put the silicon chip with uranium particles into the reagent bottle, add HNO3, heat on the electric heating plate to dissolve the particles, and then add Deionized water is used to adjust the acidity; in the step (4), a multi-receiver inductively coupled plasma mass spectrometer (MC-ICP-MS) is used to simultaneously receive 235U and 238U signals for sample measurement. The invention provides a SEM-ICP-MS method for determining the uranium isotope ratio of a single particle with fast particle dissolution rate, large sample processing capacity, small amount of sample required for measurement, relatively high measurement precision and short measurement time.

The invention relates to a method and equipment for measuring light transmittance, which can realize cheap and convenient measurement of the light transmittance of an optical lens with refractive power with excellent precision. The method for measuring light transmittance includes deriving the light transmittance of a lens to be inspected (30) from a value corresponding to a ratio when the lens to be inspected (30) is positioned at In the optical path of the measuring light (L) of the detection device (50), the intensity of the measuring light (L) detected by the light detecting device (50) when the measuring light (L) passes through the lens (30) to be inspected The ratio of the intensity of the measuring light (L) detected by the light detecting device (50) when the lens (30) is not placed in the optical path of the measuring light (L) so that the measuring light (L) does not pass through the lens (30) to be inspected, Wherein the measurement light (L) passes through the lens to be inspected (30) under the condition that the light of the measurement light (L) converges at or near the position where the lens to be inspected (30) is located.

The invention discloses a measurement apparatus and method for a minimum vacuum leak rate. According to the method, a calibration chamber pressure is maintained to a background pressure and measurement and calculation are carried out to obtain a rise rate R0 of a background ion current of the calibration chamber; a calibrated vacuum standard leak hole flow is introduced into the calibration chamber to carry out static accumulation, and measurement and calculation are carried out to obtain a rise rate RL of an ion current containing the calibrated vacuum standard leak hole flow and the background; a standard flow of a known floe QS is led into the calibration chamber to carry out static accumulation, and measurement and calculation are carried out to obtain a rise rate RS of an ion current containing the standard flow and the background; and then a leak rate QL of the calibrated vacuum standard leak hole is calculated based on a formula: QL/QS=(RL-R0)/(RS-R0). With the method, flow conductance ratio measurement can be avoided. The method and apparatus are suitable for measurement and calibration of a minimum vacuum leak rate; and thus the measurement and calibration lower limits of the minimum vacuum leak rate are extended and a foundation is provided for precise measurement and calibration of a minimum vacuum leak rate less than 1*10<9>Pa.m<3>/s.

The invention discloses a carrier interference noise ratio measuring method and communication equipment, for advancing estimating accuracy of the carrier interference noise power. In the invention, the difference of a channel estimated value on a first subcarrier and the difference of the channel estimated value on a second subcarrier of each pair of subcarrier are respectively determined in two pairs of pilot frequency signals, and each pair of pilot frequency signal is subtracted from two differences obtained by each pair of subcarriers, wherein the subtracted result is as the overlapping of the interference noises corresponding to each pair of subcarriers. A total interference noise power of the pilot frequency signals is obtained according to the overlapping of the interference noise. Corresponding interference noise ratio is obtained according to the total interference noise power and the total power of the pilot frequency signals in the sub-frame, and the interference noise ratio is as the carrier interference noise ratio. According to the technical project of the invention, estimating accuracy of the carrier interference noise ratio is increased, and process is relatively simpler.

The invention relates to concrete production equipment, in particular to a sandstone water ratio measurement and control system. The invention aims to provide the sandstone water ratio measurement and control system which can measure and control the sandstone water ratio in different states in real time. In order to fulfill the aim, the sandstone water ratio measurement and control system provided by the invention comprises a sandstone water ratio measurement system, an analog-to-digital conversion communication system and a control system, wherein the sandstone water ratio measurement system comprises a water ratio sensor; the analog-to-digital conversion communication system comprises an input/output (I/O) module, an analog quantity module and a communication module connected in order; the water ratio sensor is connected with the I/O module through a connecting cable; and the control system is connected with the communication module through a communication cable. The sandstone water ratio measurement and control system is high in intelligence degree and quick in response, the measured data is reliable, manual intervention is less when the system is used, the current weighing is automatically intervened by the system, and the measured numerical value is accurate.

A system for reporting a reception ratio of a broadcast service in a broadcasting system. A network entity sends a reception ratio report indication message indicating at least one measurement type of a reception ratio for a broadcast streaming service. A terminal receives the reception ratio report indication message, and sends a reception ratio report message including the reception ratio indicative of a ratio of an expectedTotalPackets indicating a total number of packets that the terminal expects to receive for a reception ratio measurement interval according to a measurement type indicated by the reception ratio report indication message, to a receivedTotalPackets indicating a total number of packets that the terminal has received for the reception ratio measurement interval.

The invention discloses a wave-transparent composite material scaling ratio design method. The method comprises the following step of: optimizing layer number of a scaling ratio simulation material, the thickness of each layer and a recipe of each layer to ensure that both a transmission coefficient and a reflection coefficient of the scaling ratio simulation material are identical with a theoretical scaling ratio material when electromagnetic waves are incident from various angles, thereby satisfying the requirements of electromagnetic scattering characteristic scaling ratio measurement. Themethod has the advantage of breaking through close restraints, for electromagnetic parameters and geometric parameters of scaling ratio materials, of a scaling ratio theory, so as to make contributionto pushing the development of a scaling ratio test technology.

The invention discloses an improved SURF algorithm based on gradient amplitude pre-operation, belongs to the field of underwater target image recognition. Based on a traditional SURF algorithm, complex Gaussian calculation is replaced through an integral graph searching mode, extreme value characteristics and high-frequency noise for describing an image exist in marginalization and sharp points ofthe image, and an image signal-to-noise ratio measurement index is introduced to highlight effective characteristics or components thereof. When a Hessian matrix is constructed through the SURF algorithm, a smooth gradient amplitude calculation method is added before Hessian, and the effect of an existing SURF algorithm is effectively improved. According to the invention, the problems of small number of feature points and non-uniform feature points of a traditional SURF algorithm are solved; the method has the advantages of being high in feature point extraction precision and better in noisesuppression force, can be introduced into underwater three-dimensional reconstruction, can effectively improve the underwater target three-dimensional reconstruction precision and quality, and provides powerful support for underwater observation and operation of an underwater robot.

The invention discloses a solid propellant viscoelasticity poisson ratio-strain rate principal curve construction method. The construction method comprises eight steps of designing a unidirectional constant speed tensile test scheme; collecting surface information; calculating a solid propellant viscoelasticity poisson ratio; drawing an isothermal curve family; calculating a translation amount; outputting a solid propellant viscoelasticity poisson ratio strain rate principal curve data point; and fitting a solid propellant viscoelasticity poisson ratio strain rate principal curve and the like.Compared with the prior art, by using the solid propellant viscoelasticity poisson ratio-strain rate principal curve construction method, non-contact measurement of solid propellant viscoelasticity poisson at different target temperature points and different target tensile rates is realized, an influence of additional stiffness during a measurement process on a poisson ratio measurement result isavoided, an error is small and accuracy is high.

A tester module is used to perform an adjacent channel leakage ratio measurement. The tester module includes a translation block, a first filter, a re-sampler, a memory, a router, a second filter and a power detector. The translation block translates a received intermediate frequency signal to a baseband signal. The first filter compensates amplitude and phase of the baseband signal for any unflatness in host hardware used to capture the received intermediate frequency signal. The re-sampler decimates the compensated baseband signal. The memory stores the decimated compensated baseband signal. The router reroutes the stored decimated compensated baseband signal to the re-sampler. The re-sampler resamples the rerouted stored decimated compensated baseband signal to perform spectrum shifting. The second filter performs a low pass filtering operation on the resampled rerouted stored decimated compensated baseband signal. The power detector detects channel power of the filtered resampled rerouted stored decimated compensated baseband signal.

The invention discloses a method for measuring molecular ratio of electrolyte in an aluminum electrolysis process. The method comprises the following steps: (1) determining a coefficient of an incremental calculation formula of aluminum fluoride in electrolyte, wherein the calculation formula is shown as WapAlF=alpha(T-temp0)+betaAlFg+gammaWaAlF+a(T-temp0)2+bAlFg2+c(T-temp0)AlFg+d; (2) calculating the addition frequency and weight each time according to the measured electrolyte level and aluminum fluoride; (3) calculating increment of the aluminum fluoride by utilizing the formula in the step (1); (4) calculating a rolling error; and (5) calculating an equivalent molecular ratio. According to the method, the aim of molecular ratio measurement is achieved, and a basis is provided for control of an electrolytic cell.

The invention relates to a portable multi-channel spectrophotometer based on a smart phone, and a method for measuring absorbance. The spectrophotometer comprises a light-shielding dark box, a light source, a cuvette rack and a measurement and analysis unit, wherein the measurement and analysis unit is the smart phone provided with a camera, and the cuvette rack is located between the light sourceand the measurement and analysis unit, so that the camera of the measurement and analysis unit is right opposite to the cuvette rack; the light source and the cuvette rack are arranged in the light-shielding dark box, and the measurement and analysis unit is arranged outside the light-shielding dark box. The intelligent mobile phone is used as a monochromatic light source generator, a light intensity signal detector and an image gray level and ratio measurement and data platform, has the advantages of being high in accuracy, simple in structure, small in size, light in weight, low in energy consumption, convenient to disassemble and carry, low in cost, high in expansibility and convenient to operate.