214 results about "Velocity ratio" patented technology

The instant invention provides a method for processing converted-wave data into interpretable images using a compact two-parameter model. The method broadly comprises the steps of: collecting both P-wave and converted-wave seismic data; identifying the arrival times of the P-wave and the converted-wave data; computing the vertical velocity ratio from the arrival time data; computing the moveout velocity ratio from the corresponding moveout velocities; computing the effective velocity ratio from the vertical velocity ratio and the moveout velocity ratio; and computing the conversion point from the short-spread P-wave moveout velocity for each reflector, from the effective velocity ratio, the C-wave moveout velocity ratio, and from the arrival time data.

An alertness monitoring system includes: means to measure velocity and amplitude of eyelid and eye movement; and storage means to continuously record the measurements. A data processor calculates the blink amplitude to velocity ratio and / or the saccade amplitude to velocity ratio and compares the measurements against a predetermined scale. The scale is derived from averaged measurements of the eye and eyelid movement parameters for a sample population measured against predetermined incremental blood alcohol levels. The output of the system can include a display for showing the alertness measurement based on the scale, or an alarm means triggered by the scale reading reaching a predetermined limit based an the blood alcohol level scale.

The invention discloses a metal oxide / carbon nano tube composite material and a preparation method and application thereof. The method for preparing the metal oxide / carbon nano tube composite material comprises the following steps: a) dispersing carbon nano tubes into ethanol or an ethanol solution taking a surfactant as a solute to obtain a solution A; b) dissolving soluble metal salts into the ethanol to obtain a solution B; c) adding urea into the solution A to obtain a solution C; d) adding water into the solution C according to the volume ratio of the water to the ethanol of 1:25-1:12.5 to obtain a solution D; e) adding the solution B into the solution D to obtain a solution E; f) refluxing the solution E at the temperature of between 100 and 150 DEG C for 2 to 20 hours to obtain a precursor of the metal oxide / carbon nano tube composite material; and g) heating the precursor from the temperature of between 20 and 25 DEG C to the temperature of between 350 and 400 DEG C according to the velocity ratio of 1 DEG C per minute in the anoxybiotic environment, and maintaining at the temperature for 1 hour to obtain the metal oxide / carbon nano tube composite material. The metal oxide / carbon nano tube composite material prepared by the method can be applied as an electrode material of an energy storage device.

A method and apparatus for measuring drowsiness particularly in vehicle operators measures the amplitude to velocity ratio for eyelids closing and opening during blinking as well as measuring duration of opening and closing. The average values for the amplitude to velocity ratios for opening and closing are weighted and added to give a drowsiness measure that is compared to a scale of drowsiness based on data collected from alert and drowsy subjects. Other eye movements can be used in the weighted algorithm. The scale of drowsiness predicts the onset of drowsiness levels that render an operator unfit to continue.

The invention discloses a method for preparing porous hollow carbon nanofiber by using metal salt pore-forming. The method comprises the following steps of: mixing metal salt with polyacrylonitrile to prepare outer-layer fluid; preparing inner-layer fluid by using soluble or volatile oil; respectively inputting the outer-layer fluid and the inner-layer fluid into the outer layer and the inner layer of a coaxial electrospinning spray head at a constant flow velocity and velocity ratio to carry out coaxial electrostatic spinning to obtain core-shell nano composite fiber; and carrying out ultrasonic washing, pre-oxidation, carbonization and ultrasonic pickling on the obtained core-shell nano composite fiber to obtain the porous hollow carbon nanofiber. The porous hollow carbon nanofiber prepared by using the preparation method has extremely wide application values in terms of gas adsorption, catalysis and battery electrode materials.

The invention relates to the processing of petroleum geophysical exploration data, in particular to a method for comparing and demarcating seismic data positions. The method comprises the following steps: carrying out pre-stack AVO processing on longitudinal wave data after data spectrum equalization to ensure that a difference attribute C and the frequency band of post-stack data of a P-SV converted wave are equivalent; carrying out large control position collection by utilizing the attribute C and the post-stack data of the P-SV converted wave processed by wavelet consistency to obtain a variation tendency of the ratio of a longitudinal wave velocity and a transverse wave velocity in a work area; scanning a sliding time window velocity ratio of the attribute C and the post-stack data of the P-SV converted wave; determining a velocity ratio on a velocity ratio spectrum; and compressing the time of the P-SV converted wave data to a longitudinal wave time scale to finish the position comparison. The invention does not need priori information restriction, avoids difficulty of position collection caused by a conventional method and can obtain a high-precision velocity ratio.

Provided is an intelligent respirator and aerating method of using the respirator, belonging to the technical field of medical instruments. The intelligent respirator comprises a circuit, an air channel, an operation panel, and a display; a flow meter and a transducer are installed inside the air channel; a power supply board is installed inside the circuit; the circuit further comprises a microcomputer electronic control panel and a vital sign transducer; the microcomputer electronic control panel is installed inside the circuit; the microcomputer electronic control panel is in communication connection respectively with the power supply board, the operation panel, the display, the air channel and the vital sign transducer. The aerating method of using the intelligent respirator comprises the following steps: collecting, by the microcomputer electronic control panel via the vital sign transducer, information changes of vital sign parameters, controlling the velocity ratio of air and oxygen in the air channel, and controlling a warning device, thereby achieving the intelligent adjustment to the oxygen concentration of the patient and sending out an alarm for emergency treatments. The intelligent respirator and aerating method of using the respirator can achieve the intelligent control, thus achieving the adjustment of oxygen concentration as in need and in time without changing the tidal volume.

The invention discloses a method for determining a fluid by utilizing seismic fluid impedance. The method comprises the following steps: exciting and recording a seismic wave to obtain an angle gather; eliminating signal frequency distortion caused by a normal moveout correction stretching effect; extracting longitudinal wave reflectivity attributes and weighted transverse wave reflectivity attributes from the compensated angle gather; computing improved fluid factors; obtaining logging data to obtain a fluid impedance curve; performing iterative inversion to obtain a section of the fluid impedance; qualitatively analyzing fluid anomalies in pores by the fluid factors, and describing spatial distribution of the fluid by the fluid impedance. The method helps accurately extract the fluid factors and directly identify components of the fluid in the pores without an assumption of a velocity ratio of the longitudinal wave to the transverse wave as well as the relation between density and the longitudinal wave velocity, which reduces ambiguity of gas layer identification, realizes direct conversion from the fluid factors to the fluid impedance and improves the precision of gas reservoir identification.

The invention provides a method for performing joint inversion on the P-wave and S-wave velocity ratio of a reservoir by utilizing P-wave and converted wave data. According to the method, an inversion target function is constructed by adopting a concept that a gamma change rate acquired from gather seismic reflection information and a gamma change rate acquired from travel time information are infinitely approximate, and key parameters of the target function comprise a P-wave intercept, a P-wave gradient, a converted wave gradient and the P-wave and S-wave velocity ratio calculated according to the travel time information, and can be acquired from the actually input amplitude versus offset (AVO) information of a P-wave and converted wave gather and the travel time information, so that the target function can be rationally constructed, and a finally inverted P-wave and S-wave velocity ratio elastic parameter is accurate.

The embodiment of the invention provides velocity analysis method and device of multi-wave seismic data. The method comprises the following steps of: pretreating the multi-wave seismic data; extracting asymptote gathers of common transition points of the pretreated multi-wave seismic data; carrying out initial velocity analysis on the asymptote gathers of the common transition points by utilizing an initial stacking velocity model to obtain an initial stacking velocity parameter; stacking the asymptote gathers of the common transition points by using the initial stacking velocity parameter to obtain a multi-wave stacking profile; carrying out relevant comparison by using a longitudinal-wave stacking profile and the multi-wave stacking profile to obtain an updated longitudinal and transverse wave velocity ratio; updating the initial stacking velocity model by utilizing the updated longitudinal and transverse wave velocity ratio to obtain a final stacking velocity parameter; and acquiring an offset velocity parameter according to the final stacking velocity parameter. Based on the asymptote gathers of the common transition points, the invention carries out velocity analysis by utilizing four parameters so that the velocity analysis can furthest coincide with the actual data.

A method and apparatus for measuring drowsiness particularly in vehicle operators measures the amplitude to velocity ratio for eyelids closing and opening during blinking as well as measuring duration of opening and closing. The average values for the amplitude to velocity ratios for opening and closing are weighted and added to give a drowsiness measure that is compared to a scale of drowsiness based on data collected from alert and drowsy subjects. Other eye movements can be used in the weighted algorithm. The scale of drowsiness predicts the onset of drowsiness levels that render an operator unfit to continue.

A blind lift device includes a fixed support, a rotating member next to the fixed support, a bead chain passed over the rotating member, a first planetary gear train between the fixed support and the rotating member, a brake member joined to the rotating member, a cap, a second planetary gear set between the brake member and the cap, and a main shaft; the second planetary gear set has a connecting shaft portion projecting through the cap, and planetary gears engaged with the brake member and an internal gear of the cap; the main shaft is joined to the connecting shaft portion and a covering member of a blind; thus, the rotational velocity ratio of the main shaft to the rotating member can be changed to suit different covering members by means of selecting and using suitable planetary gear trains according to the dimensions and weights of the covering members.

Provided is a vehicular radar device which is capable of reducing an operation resource quantity necessary for a process of estimating an axis deviation angle in a radar measurement coordinate system, to thereby reduce a device size. The vehicular radar device includes: a measurement unit that measures an azimuth angle and a relative Doppler velocity; an extraction / accumulation unit that extracts target information satisfying conditions related to the relative Doppler velocity, a travel speed and a turning velocity, and accumulates the azimuth angle and a velocity ratio obtained by dividing the relative Doppler velocity by the travel speed of the subject vehicle among the extracted target information; and an axis deviation angle estimate unit that reads the target information accumulated in the extraction / accumulation unit, and estimates an axis deviation angle of the measurement coordinate system of a radar based on a second-order polynomial expression of the azimuth angle of the target.

The invention provides a converted wave anisotropy velocity analysis method and device. The method includes the steps that the vertical velocity ratio, the effective velocity ratio and equivalent anisotropy parameters of converted waves are worked out according to the stacked section of longitudinal waves, the stacked section of the converted waves, the velocity of the longitudinal waves, the velocity of the converted waves and anisotropy parameters of the converted waves; with the speed of the converted waves, the vertical velocity ratio, the effective velocity ratio and the equivalent anisotropy parameters of the converted waves which are obtained as the initial parameters of pre-stack time migration of seismic data of the converted waves, the velocity parameter of pre-stack time migration of the converted waves is worked out, the first time of pre-stack time migration is performed, and a common imaging point gather is acquired; by analyzing the velocity of the converted waves corrected by residual moveout and the anisotropy parameters of the converted waves in the common imaging point gather, the common imaging point gather is acquired, and the velocity of the converted waves and the anisotropy parameters of the converted waves continue to be corrected till the acquired common imaging point gather is in even alignment in window. Through the converted wave anisotropy velocity analysis method and device, the accuracy of the converted wave anisotropy velocity analysis result is improved, and the processing cost is reduced.

An alertness monitoring system uses reflectance measurement of infrared light pulses to monitor eye movement of a vehicle or machine operator. The data is used to measure eye and eyelid movement for presence slow or drifting eye movements, and / or eyelid closure and optionally one or more of, absence of saccadic movement, loss of eye co-ordination, wavering eyelids, partial eye closure, and drooping eyelids as indicators of loss of attention and drowsiness. The eye movements of a subject are analysed using reflected infra red light to obtain measures of the blink amplitude velocity ratio and the saccade amplitude velocity ratio. The readings are continuously compared with eye movement data indicative of degrees of alertness so that the monitor provides an indication of the operator's fitness to operate the vehicle or machine from the point of view of drowsiness no matter how it is caused.

An ultrasonic pulse is applied from a transmission probe for longitudinal waves kept in contact with the external surface of a concrete structure into the interior of the structure, and a reflected wave returning after being reflected by the boundary face of the concrete structure is detected with a reception probe for longitudinal waves kept in contact with the external surface of a concrete structure. As the first peak recognized in the waveform of the reflected wave represents the reaching time T1 of the bottom face echo which has undergone no mode conversion, and the subsequently obtained second peak, in about 1.3 to 1.7 times when first peak appeared, represents the reaching time T2 of the delayed echo which has undergone a mode conversion, the sonic velocity ratio R of longitudinal wave to transverse wave is calculated from these reaching times T1 and T2. Then, object physical quantities corresponding to the sonic velocity ratio R are figured out from correlations known in advance regarding the concrete structure between the sonic velocity ratio R and object physical quantities.

In one embodiment, a multi-path ultrasonic flow meter for determining the flow rate of a fluid in a conduit is disclosed comprising at least two transducer pairs attached to the conduit at two chord locations, one greater than and one less than a mid-radius chord, wherein the composite ratio the two path velocities to the flow rate is substantially constant over the range of Reynolds numbers. In another embodiment, a method of determining the flow rate of a fluid in a conduit is disclosed comprising the steps of determining a composite velocity by determining a weighted average of a plurality of path velocities, determining a chord velocity ratio based on the path velocities, determining a profile correction factor based on the composite velocity and the chord velocity ratio, and determining the flow rate based on the composite velocity and the profile correction factor.

An infinitely-variable transmission comprises a rotational input member, a rotational output member, first and second non-circular driving gears coupled to one of the rotational members, and a plurality of variable velocity-ratio gear assemblies disposed about the one rotational member. Each gear assembly comprises an intermediate shaft including first and second non-circular driven gears respectively meshing with the first and second non-circular driving gears. Each gear assembly also comprises a multi-directional coupling associated with the pair of first driven / driving gears and the pair of second driven / driving gears, and an actuator for coupling the first and second variable-ratio gear pairs to the rotational members. The transmission also includes a phase angle variator associated with the variable-ratio gear pairs for varying the rotational angular displacement between the first gear pairs and the second gear pairs of each gear assembly so as to vary the velocity ratio of the transmission as needed.

The invention provides an asphalt mixing plant aggregate gradation online detection and overflowing prevention control method and system. The system comprises a plurality of feeding bins, a pluralityof aggregate conveying belts, terminal equipment, a PLC controller, a frequency converter and a plurality of motors, wherein the quantities of the feeding bins, aggregate conveying belts and motors are the same; an aggregate conveying belt is arranged under each feeding bin; a camera obscura is fixedly arranged on a guide rail of each aggregate conveying belt; light equipment is arranged in the camera obscura; an image collector is arranged at the top of the camera obscura; the terminal equipment is connected with the image collector, so as to receive and process collected images; the terminalequipment is connected with the PLC controller, so as to send a velocity ratio required to be achieved by each aggregate conveying belt; the PLC controller is connected with the frequency converter;the frequency converter is connected with all the motors; each motor is connected with an aggregate conveying belt, so as to perform speed control. The system can ensure that aggregate gradation is qualified and matching requirements are met, and can effectively prevent the phenomenon of overflowing during asphalt mixing.

The present invention relates to a production method of a plastic optical fiber which comprises the steps of heat drawing an undrawn plastic optical fiber obtained by melt spinning and annealing the drawn fiber at a circumferential velocity ratio between the front and rear rollers (circumferential velocity of a rear roller / circumferential velocity of a front roller) of 0.5 to 1.2 under heating conditions which satisfy 4≦y≦−1.5x+330 and (Tgc−5)° C.≦x≦(Tgc+110)° C. [Tgc: a glass transition temperature of a core, x: an annealing temperature (° C.), and y: an annealing time (seconds)]. According to the present invention, a plastic optical fiber having a small thermal shrinkage ratio and excellent heat resistance can be provided.

The present invention discloses a method and an installation of monitoring and controlling an oxygen inhalator. Under the control of a microcomputer, an upper limit and a lower limit of a patient blood oxygen saturation are set, and a preset flow velocity ratio is set for the oxygen inhalator. The oxygen inhalator is opened and supplied with oxygen at the preset flow velocity, after a period of time, the blood oxygen saturation inside the body of the patient who inhales oxygen is inspected, the flow velocity of a proportion electromagnetic valve which is in series in an gas path of the oxygen inhalator is regulated properly until the blood oxygen saturation is within a preset range. The apparatus not only has the characteristics of the oxygen inhalator and a monitor but also closely combines the oxygen inhalator and the monitor to realize an interaction. The apparatus provides monitoring of life sign parameters such as the blood oxygen saturation and can automatically change an oxygen inhalation flow velocity with the preset flow velocity range according to the timely collected changes of the patient life singe such as the blood oxygen saturation and accordingly a patient oxygen inhalation concentration is changed, then the patient life sign is improved.

The invention discloses a method for determining a large transverse wave static correction value of a converted wave demodulator probe, which is adaptive to conditions of low signal-to-noise ratio and complex construction. The method comprises: calibrating a group of reflecting layers on longitudinal wave and converted wave common demodulator probe superposing data; picking a group of reflecting layer positions to obtain a longitudinal wave reflection time along the layers on longitudinal wave common demodulator probe superposing data; picking a group of reflecting layer positions to obtain a converted wave reflection time along the layers on the converted wave common demodulator probe superposing data; on the longitudinal wave and converted wave common demodulator probe superposing data, selecting points which can represent longitudinal wave and converted wave construction forms, and coupling same layer positions of longitudinal waves and converted waves to obtain a sparse longitudinal and transverse wave velocity ratio value gamma [0]; and finally calculating to obtain the transverse wave static correction value of the converted wave demodulator probe. By using the method provided by the invention, a large transverse wave static correction value of a converted wave demodulator probe can be effectively determined.

A hybrid-drive vehicle (1) having a pair of drive wheels (3); a combustion engine (5) having a drive shaft (6); a first electric motor-generator (8) having a first shaft (7) connected mechanically to the drive shaft (6) of the combustion engine (5); a second electric motor-generator (11) having a second shaft (10); and an electric power supply device (14) connected electrically to the two electric motor-generators (8, 11) and having a storage device (15); the first shaft (7) of the first electric motor-generator (8) is connected at one end to the drive shaft (6) of the combustion engine (5), and is connected at the opposite end to the drive wheels (3) with a fixed, non-adjustable velocity ratio.

The invention relates to an adhesive tape winding machine. The winding machine comprises a rack, a drive motor, a line bundle drawing mechanism, an adhesive tape winding mechanism and a line bundle guide mechanism, wherein the line bundle drawing mechanism, the adhesive tape winding mechanism and the line bundle guide mechanism are sequentially arranged on the rack; the line bundle drawing mechanism comprises a transmission case, a drawing drive roll and a drawing driven roll, wherein the drive motor and the input shaft of the transmission case are connected in a mechanical transmission way, and the output shaft of the transmission case and the drawing drive roll are connected in a mechanical transmission way; the adhesive tape winding mechanism comprises an annular runner on which an adhesive tape mounting device is arranged, and the annular runner and the drive motor are connected in a mechanical transmission way; and the line bundle guide mechanism comprises a line bundle guide wheel and a support frame, wherein the line bundle guide wheel and the support frame are rotationally connected. According to the adhesive tape winding machine provided by the invention, the adhesive tape winding mechanism and the line bundle moving mechanism are driven by a same motor, so that the movement velocity ratio is constant, adhesive tapes are uniformly wound, the energy consumption is low, and the equipment cost is low.

The invention relates to a non-circular gear transmission case and a transmission mechanism thereof. The transmission mechanism is a combined type transmission mechanism with a non-uniform velocity ratio, comprising a non-circular gear transmission case (24), a low speed motor (20), a chain wheel train (21, 22, 23) or a belt wheel train. The output torque and the output rotating speed of the transmission mechanism are consistent with a mainframe load change form; therefore, the transmission mechanism can save energy by a big margin when being used in a mechanism requiring transmission with a non-uniform velocity ratio. The pitch curve shape of non-circular gears (27, 28), and geometric and initial position parameters are determined by an optimized design according to the mainframe load change form, continuity of the pitch curve and fabrication procedure and the like. When the non-circular gears (27, 28) are connected with a circular gear train and a circular gear planetary gear train power, non-circular gear transmission cases of various forms can be formed. An energy-saving beam pumping unit can be formed by removing a speed reducer, a belt wheel and an electric motor and installing the non-circular gear transmission case and the transmission mechanism thereof on a conventional beam pumping unit.

The invention discloses a yarn method and device for implementing color mixing of double-color roving through asynchronous / synchronous two-stage drafting. A drafting and twisting system comprises a primary drafting unit and a secondary drafting unit arranged at the front and back and a double-ingredient combining twisting unit; the primary drafting unit comprises a combined rear roller and an intermediate roller; the combined rear roller comprises a first rear roller and a second rear roller abreast arranged on the same rear roller shaft; the linear velocity ratio Vq / Vz of a front roller to the intermediate roller is constant, and the yarn blending ratio is dynamically regulated online so as to regulate the yarn color through regulating the rotating speed of the first rear roller and / or second rear roller. The color mixing proportion control for the colored spun yarn produced by the method is more uniform and precise, and the color change is richer.

The invention discloses a method for evaluating the degree of disturbance of soft soil by using shear wave velocity, which comprises the following steps: using a surface wave testing device to perform in-situ shear wave velocity testing; drilling samples; and using a portable piezoelectric ceramic bending element to shear the soil The wave velocity test device carries out the on-site shear wave velocity test; the ratio of the on-site shear wave velocity to the in-situ shear wave velocity is used as the judgment standard, and an on-site evaluation is performed according to the classification standard to judge whether the soil sample meets the sampling requirements; before the indoor strength test, the portable pressure is used again. The electric ceramic bending element soil shear wave velocity test device carries out the indoor shear wave velocity test; the ratio of the indoor shear wave velocity to the in-situ shear wave velocity is used as the judgment standard, and the indoor secondary evaluation is carried out according to the classification standard to judge whether the soil sample meets the strength test requirements. The invention has simple steps and accurate test results, can judge the disturbance degree of the sample on site and in the room, and can meet the requirements of general engineering survey and strength test.