35 results about "Characteristic ratio" patented technology

It is possible to reduce errors generated between multiple D/A conversion paths. A characteristic acquisition device includes [1] an arbitrary signal generator that converts a first (second) input digital pattern into a first (second) output analog pattern, [2] a digitizer that converts a first input analog pattern into a first output digital pattern, and [3] a characteristic acquisition device that includes a first transmission characteristic deriving unit that derives a first transmission characteristic which converts the first input digital pattern into the output digital pattern where the input analog pattern is the first output analog pattern, a second transmission characteristic deriving unit that derives a second transmission characteristic which converts the second input digital pattern into the output digital pattern where the input analog pattern is the second output analog pattern, and a transmission characteristic ratio deriving unit that derives a transmission characteristic ratio which is a ratio relating to the first transmission characteristic and the second transmission characteristic.

A polarizing film comprising a stretched film containing iodine, wherein an absorbance characteristics ratio of ((an absorption peak A in a wavelength range of 550 to 650 nm)/(an absorption peak B in a wavelength range of 450 to 520 nm)) is no more than 1.5 when the polarizing film is arranged in a crossed Nicol, form a liquid crystal display for color display that provides as neutral hue as possible, and gives good black color display, and as a result gives an outstanding reproducibility of color.

The present application relates to a method, an apparatus and a storage medium for locating QR codes. For automatically locating a plurality of QR codes in image of any size, the invention provides an apparatus for locating at least one QR code in an image, comprising: characteristic ratio detection means for detecting the potential QR code location symbol areas by carrying out a plurality of detections for detecting the characteristic ratio of the QR code; critical edge detection means for detecting the critical edges of the potential QR code location symbol areas so that the false areas are excluded; location symbol grouping means for matching the detected QR code location symbol areas into potential QR codes; and verification means for excluding the false QR codes. The invention also provides a corresponding method for locating at least one QR code.

The invention discloses an oil and water layer recognition method suitable for a volcanic reservoir. The oil and water layer recognition method comprises the following steps of performing inversion processing on an echo string by using nuclear magnetic logging data in a dual waiting time mode to obtain a long waiting time T2 spectrum and a short waiting time T2 spectrum; then performing differential spectrum processing to obtain a difference spectrum reflecting oil and gas information; performing integral processing on the difference spectrum to obtain difference spectrum porosity (Diff_Por); determining sensibility of various hydrocarbon components on an oil and water layer by gas logging data establishing a hydrocarbon characteristic ratio (Ratio_C); establishing a cross plot of the difference spectrum porosity and the hydrocarbon characteristic ratio according to existing oil testing data and determining a distinguishing boundary of the oil and water layer; extracting the difference spectrum porosity and the hydrocarbon characteristic ratio of a stratum of which oil and water are about to be recognized according to the previous steps; and effectively recognizing the oil and water layer by using the established cross plot. On the basis of nuclear magnetic differential spectrum processing, processing is carried out further to obtain the difference spectrum porosity, the cross plot is established by the difference spectrum porosity and the hydrocarbon characteristic ratio obtained by the gas logging data, and then the oil and water layer of the volcanic reservoir can be recognized.

The invention relates to an apparatus for diagnosing the function of endothelial cells of the blood vessels, belonging to the medical electronic apparatus. The apparatus for diagnosing the function of endothelial cells of the blood vessels comprises a peripheral circulation detection system, an automatically controlled pressurizing system, a man-apparatus interface, an embedded hardware circuit, a software algorithm module and the like which can be assembled together to form the vertical apparatus. The apparatus is used for testing the function of endothelial cells of the vessel by observing the fluctuation of the blood vessels and the blood flow of the fingertips, applying compression pressure to the blood vessels of the fingertips, observing the change of the functions of the peripheral tension which is generated after the additional compression pressure is released, obtaining the complex change of the blood flow waveforms and the specific capacity, and describing the change of the blood vessels expansion which is generated after the additional compression pressure is released according to the change of the chaotic attractors with phase spaces, wherein the chaotic attractors with phase spaces can be used for deriving the intrinsic characteristic ratio so as to obtain the change rate of an intrinsic axis for contrasting the scales of the chaotic attractors in the phase spaces and the change rate of various chaotic invariants. The % FMD can be obtained according to the change rate of the intrinsic axis and can be well combined with the function of endothelial cells of the blood vessels so as to assess and diagnose the function of the endothelial cells of the blood vessels.

The invention provides a state monitoring device provided with a provided with machine pump online energy efficiency evaluation function. An energy efficiency module is arranged in a CMS acquisition host machine; after sensor data is acquired and energy efficiency is analyzed, real-time energy efficiency analysis results are sent to a software system; after performing HILBERT transform, rotation speed order analysis and FFT analysis on a filtered signal, a fault diagnosis module extracts energy amplitude which corresponds to each anomalous characteristic ratio, compares energy percentage of each anomalous characteristic point with a threshold value, and performs fault alarm while each anomalous characteristic point exceeds the threshold value. The state monitoring device calculates energyconsumption and an efficiency state of a motor, a water pump and a unit in real time through an energy efficiency analysis module of the state monitoring device, so that energy consumption analysis data and fault diagnosis data are provided on line in real time.

The invention discloses an arc sensing seam tracking control method and a device based on harmonic analysis, which are used for detecting seam deviation and adjusting the position of a welding gun in a special automatic welding machine. The method comprises the steps of performing hardware filtering processing on an output signal of an arc sensor first, then conveying to a control system for data sampling and software filtering processing, detecting seam lateral deviation on data after software processing by adopting a biharmonic amplitude characteristic ratio method, detecting seam vertical deviation by adopting a scanning space weighted integral differential method, and respectively outputting enable signals to two motor drivers by the control system according to lateral and vertical deviation values so as to drive a lateral motor and a vertical motor, so that a cross sliding frame moves, and the welding position of the welding gun installed on the cross sliding frame is adjusted. By adopting the method, the seam lateral deviation and the seam vertical deviation can be accurately detected, the antijamming capability is high, and the method can be used for automatic correction of the welding gun in automatic welding production and is an important guarantee for increasing the automatic welding efficiency and quality.

The invention discloses a test method for decomposition characteristics of sulfur hexafluoride at different overheat fault temperatures. The method comprises: connecting a test system and checking theairtightness of a closed air chamber in the system; cleaning the closed air chamber, injecting SF6 new gas after vacuumizing of the decomposed closed air chamber, and carrying out vacuumizing again,and repeating the process three times; setting a needed simulated fault temperature value and carrying out testing; and extracting SF6 decomposition component sample gas from a gas extraction hole andcarrying out quantitative analysis on the sample component. According to the invention, the characteristics of the decomposition product of hexafluoride hexafluoride at different temperatures can bedetected; the SF6 decomposition component can be detected comprehensively; and the experimental foundation is laid for studying the SF6 over-heat decomposition phenomenon comprehensively and systematically. Besides, a related component characteristic ratio can be configured based on the foundation so as to represent the severity degree and development trend of the overheat fault.

The invention discloses a recovering method of a synchronous nitrosation-anaerobic ammonia oxidation and denitrification process, and belongs to the field of advanced wastewater treatment. In the SNAD (Synchronous Nitrosation-Anaerobic ammonia oxidation and Denitrification) process, NOB (Nitrite Oxidizing Bacteria) can be greatly proliferated due to inappropriate operation, and the denitrification effect of the system is continuously decreased and even broken down. According to the recovering method disclosed by the invention, (1) an aeration rate is adjusted to always maintain the dissolved oxygen concentration in the reaction stage to be under 0.3 mg/L; (2) the hydraulic retention time (HRT) is shortened, and the effluent of the reactor always contains NH4<+>-N (greater than or equal to 10 mg/L); (3) an NaOH solution is added to the inflow, and the pH value of the inflow is increased to 7.8-8.0; (4) an inorganic carbon source is artificially added to the inflow, and the ratio of the basicity to the ammonia-nitrogen concentration is maintained to be 10 (gCaCO3/Gnh4<+>-N) above. The strategies are maintained to be continuously operated until the characteristic ratio (namely the ratio of a total nitrogen removal amount to the generated nitrate-nitrogen amount) is greater than 20, the total nitrogen removal rate is greater than 75%, and the strategies are continuously operated for more than 10 cycles, and then the synchronous nitrosation-anaerobic ammonia oxidation and denitrification process is considered to be effectively recovered.

The invention provides a line frequency detector. The line frequency detector receives an input signal representing a power source and detects a line frequency of the power source based on the input signal. The line frequency detector includes a first band pass filter having a pass band centered at an upper end of an expected frequency range of the power source and a second band pass filter having a pass band centered at a lower end of the expected frequency range. The input signal is filtered by the first and second band pass filters, generating a first characteristic signal and a second characteristic signal. The line frequency detector determines a characteristic ratio between the first characteristic signal and the second characteristic signal, and maps the characteristic ratio to the line frequency of the power source.

The present invention provides a multi-factor integrated parametric design method for a power split hybrid bus, and power supply efficiency, transmission efficiency, vehicle ride-through cycle requirements and main control strategies are taken into account in the method. The multi-factor integrated parametric design method for the power split hybrid bus comprises the following steps: (1) selecting a reasonable engine control strategy; (2) selecting an engine based on the steady-state operation requirement, wherein the step comprises: carrying out theoretical calculation on the output power of the engine and verifying whether the power of the engine can meet the power requirement under most driving cycle conditions; (3) determining the characteristic ratio of a former PG group according to the transmission efficiency and the working performance of the vehicle, wherein the step is: determining the boundary of the characteristic ratio of the former PG group, and obtaining an optimal characteristic ratio of the former PG group based on the transmission efficiency of the power split system and the working performance of the vehicle; and (4) determining other components of the power split system according to the dynamic performance and operation requirements.

The invention relates to a small wave height extraction method based on a water surface state continuous imaging system. The method comprises the following steps: (1) the water surface state continuous imaging system is used for gathering wave echoes in a detection area, the echoes are sampled and imaged, and an N-frame (32 to 128-frame) of echo image sequence is formed; (2) Weibull distribution model parameters satisfied by normal height wave echoes are determined to acquire the offset between a small wave echo kurtosis and the Weibull distribution kurtosis satisfied by normal height wave echoes; (3) a small wave echo texture apparent characteristic ratio is acquired; (4) according to the offset and the echo texture apparent characteristic ratio, wave height factors in a small wave height extraction model are determined; and (5) small wave height data are acquired, the wave height factors are subjected to linear fitting, an empirical correction constant for the small wave height extraction model is obtained, and the small wave height extraction model is thus acquired. The method of the invention is simple, effective, few in occupied resources and is applicable to various types of radar, infrared and visible light imaging systems.