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.

A spread-spectrum preamble synchronization peak detection system performs multiple statistical tests based on instant and time-averaged channel condition measurements to identify the synchronization peak. In a normalized peak-to-average test, a peak-to-average ratio measurement is normalized by a signal-to-noise ratio measurement to form a new statistical measure which effectively eliminates the impact of the wide dynamic range of the signal-to-noise ratio of the received samples. A transition SNR test is used to eliminate potential false alarms caused by spurious PARN peaks during the transition period at the onset of preamble arrival. Code-phase aligned time-averaging is used to estimate the signal and noise levels over a sliding window. The code-phase alignment of samples effectively separates signal and noise samples in the averaging process, and resulting in more accurate signal and noise measurements. In estimating noise levels, the system takes multi-path interference into account by excluding both the peak signal and the side-lobe signals caused by multi-path wireless channels, resulting in more accurate estimation of noise level.

A simulation apparatus of a semiconductor integrated circuit, capable of measuring power consumption in a higher abstract degree than an RT level and in a high speed, is realized, so that a low power consumption designing operation can be carried out by employing a simulation result. While a cycle base model of a designing subject circuit is arranged by a state control module model, a calculation module model, and a memory model, in the calculation module model, an algorithm description is made; a detailed structure such as a pipeline of hardware is shortcircuited to a calculation to be processed in a unit clock; and a timing shift is absorbed in a wait state of the state control module model, so that a high-speed simulation can be realized. Since such information as an area and a wiring capacitance is added to an activating ratio measurement of a simulation model, power consumption can be measured. A priority arraigning / wiring operation of a function module is carried out based upon this measurement result, and then, a simulation is repeatedly performed so as to execute optimum arranging / wiring operations, so that low power consumption designing can be realized.

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.

A method and associated apparatus for in-process automated analysis employing a mass spectrometry ratio measurements is disclosed. It involves elemental and speciation threshold measurement that is optimized for quality assurance at and is capable of functioning at and near quantitative instrumental detection limits. The system is automated and may be employed in an unattended operation for identification and quantification of elemental or specie contaminants. In a preferred aspect of the method, a sample is subjected to equilibration with at least one spike after which it is subjected to ionization in an atmospheric ion generator and processed by a mass spectrometer with the output of the mass spectrometer being processed by a microprocessor which through a controller coordinates operation of sample and spike delivery and equilibration as well as the operation of the atmospheric ion generator and mass spectrometer. The method may in the alternative be employed qualitatively.

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 provides a method for measuring field rainfall erodibility. The method comprises the following steps of: selecting an experiment area; setting a micro area; simulating a rain-dropping machine to perform wet rainfall and erosion ratio measurement; calculating the erosion ratio; and then calculating the soil rainfall erodibility. In the invention, by setting the micro area and combining the earth surface treatment, manually simulated rainfall and the like, the runoff in the micro area can be quickly and effectively collected, and the erosion ratio and rainfall erodibility can be calculated; the method can be widely applied to the rapid measurement of different outdoor soil rainfall erodibilities; and moreover, the whole steps and method are simple, the equipment cost is relatively low, and the measurement is quick.

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.

A method and apparatus for enabling an inexpensive and easy measurement of light transmittance of an optical lens having refractive power with excellent accuracy is disclosed. The method for measuring light transmittance comprises deriving light transmittance of a lens 30 to be examined from a value corresponding to a ratio of an intensity of measuring light L detected by a means for detecting light 50 when the lens 30 to be examined is placed in a path of the measuring light L emitted from a light source 10 and reaching the means for detecting light 50 and the measuring light L passes through the lens 30 to be examined to an intensity of the measuring light L detected by the means for detecting light 50 when the lens 30 to be examined is not placed in the path of the measuring light L and the measuring light L does not pass through the lens 30 to be examined, wherein the measuring light L passes through the lens 30 to be examined in a condition such that rays of the measuring light L converge at or in a vicinity of a position where the lens 30 to be examined is disposed. <IMAGE>

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.

A method for measuring the amount of fluid contained in a reaction vessel in a clinical analyzer includes the steps of adding a first aliquot of fluid to the reaction vessel and measuring the quantity of fluid contained therein. A second aliquot of fluid is then added to the reaction vessel and the quantity of fluid contained therein is also measured. Measurement of the two fluid quantities can occur with or without removal of the first aliquot in between measurements. In obtaining the two quantity measurements and comparing them against a standard, the effects of well geometry can be minimized. Preferably, a delta or ratio measurement is obtained between the first and second liquid volume measurements which can be compared against a standard so as to normalize apparent volume losses or gains due to reaction well dimensional variation. This approach enhances the analytical capability to detect true fluid delivery errors.

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 present invention belongs to the field of electronic measurement technology, and is especially one new kind of current measuring method. Without need of outer work power supply, one current transformer CT, current / voltage converting circuit and other circuit are used to obtain the work power supply for the measurement device and relative measured current signal. The present invention features that only one current transformer CT, one current / voltage converting circuit comprising shunt regulator, rectifying filter, sampling circuit, delayed comparator, driver circuit and voltage stabilizer, and one signal processing and displaying unit are used to obtain the work power supply for the measurement device and one pulse voltage signal with duty ratio corresponding to the measured current for current measurement via the duty ratio measurement. The present invention has wide measurement range, and is especially suitable for where no work power supply is provided.

The invention provides a GIS type current transformer test method. The CT hysteresis loop measurement function and the CT and PT alternating current and direct current resistance measurement function are added and the problem that an extrapolated result acquired through a traditional low-voltage extrapolation method is not accurate is solved. The traditional highest test voltage of the transformer is increased to 45 kV from 400 V, CT volt-ampere characteristic test accuracy is increased to 0.001 V (0.001 A) from 0.1 V (0.1 A), the inflection point test function is added, and the transformation ratio test range is increased to 1:35,000 from 1:2,000. By the adoption of the method, the turn ratio of a current transformer is accurately measured through the high-frequency voltage, line-frequency induction voltage interference is avoided, and exciting currents generated in the turn ratio measurement process are reduced. A test method is implanted in a GIS type current transformer test device through software, and the GIS type current transformer is measured. The method is suitable for various current transformers including the GIS type current transformer and field verification of metering current transformers in a 10 kV to 500 kV transformer substation.

A spread-spectrum preamble synchronization peak detection system performs multiple statistical tests based on instant and time-averaged channel condition measurements to identify the synchronization peak. In a normalized peak-to-average test, a peak-to-average ratio measurement is normalized by a signal-to-noise ratio measurement to form a new statistical measure which effectively eliminates the impact of the wide dynamic range of the signal-to-noise ratio of the received samples. A transition SNR test is used to eliminate potential false alarms caused by spurious PARN peaks during the transition period at the onset of preamble arrival. Code-phase aligned time-averaging is used to estimate the signal and noise levels over a sliding window. The code-phase alignment of samples effectively separates signal and noise samples in the averaging process, and resulting in more accurate signal and noise measurements. In estimating noise levels, the system takes multi-path interference into account by excluding both the peak signal and the side-lobe signals caused by multi-path wireless channels, resulting in more accurate estimation of noise level.

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 provides a retransmission method of unauthorized spectrum communication and a base station and user equipment. The method comprises the following steps: the base station sending configuration information of unauthorized carrier channel occupancy ratio measurement to user equipment; the user equipment performing the channel measurement according to the configuration information of the unauthorized carrier channel occupancy ratio measurement; and the user equipment sending a unauthorized carrier channel occupancy ratio measurement result to the base station. The occupancy condition of the unauthorized spectrum can be immediately reported to the base station equipment so as to help the base station equipment to acquire an interference condition of WiFi on the unauthorized spectrum besides the existing measurement result based on the channel attenuation, and then the more optimized spectrum selection and scheduling can be performed to achieve better system perform.

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.

The invention relates to a measuring method of X-ray diffraction peak height ratio and discloses a fixed point measuring method of X-ray diffraction peak height ratio, including the following steps: (1) a powder sample is tableted and measured on an X-ray diffractometer so as to determine that the peak height ratio of which peaks needs to be calculated to represent material characteristic according to the phase composition of the sample; (2) the counting interval for calculating peak height ratio by the fixed point measuring method is optimized; (3) the diffraction peak height ratio result of the sample is obtained by common continuous scanning method; (4) the diffraction peak height ratio result of the sample is obtained through fixed point measuring method; (5) the measured results of the step (3) and the step (4) are compared; (6) sample preparation is completed once again and the diffraction peak height ratio result of the newly prepared sample is measured through fixed point measuring method. The invention greatly increases accuracy and repeatability of X-ray diffraction peak height ratio measurement, thereby people can know better about material characteristic; moreover, the invention provides more accurate basis for presuming cycle life and electricity storage of cell.

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.

Improved gas leak detection from moving platforms is provided. Automatic horizontal spatial scale analysis can be performed in order to distinguish a leak from background levels of the measured gas. Source identification can be provided by using isotopic ratios and / or chemical tracers to distinguish gas leaks from other sources of the measured gas. Multi-point measurements combined with spatial analysis of the multi-point measurement results can provide leak source distance estimates. These methods can be practiced individually or in any combination.

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.