38 results about "Phase dynamics" patented technology

A combustor for a gas turbine engine and related method is provided in which a plurality of combustor cans are selectively adapted with corresponding resonators. The resonators may, for example, be attached to every can in the consecutive arrangement of combustor cans, every other can, every third can or the like, and may be tuned to the same or first, second, third, etc. frequencies of operation. Such selective tuning is configured to suppress one or more of out-of-phase and in-phase dynamic interaction of streams discharged from adjacent combustor cans by changing the frequencies of pressure oscillation instabilities across the arrangement of consecutive cans.

An adaptive receiver to provide reliable estimates of the symbols for the high-order MQAM and MPSK modulated signals received in the presence of amplitude fading and phase dynamics induced due to time-varying atmospheric or terrestrial multipath fading encountered in wireless communication channels. The adaptive receiver encompasses an adaptive tracking loop comprised of adaptive channel fade envelope estimator derived from the high-order modulated signal, a novel phase detector to separately estimate the phase due to the fading channel and the reference oscillator from that due to the data modulation present in the received signal without the need of any pilot symbol or pilot carrier, and a Kalman filter, a fixed-lag smoother and a smoothed symbol detector.

The invention discloses a jumping robot and a motion optimization method adopting inertia matching. The jumping robot consists of a matrix operation controller, an aluminum plate body, a joint drive motor and a motion control algorithm with inertia matching. The system uses the jumping robot as a research object; the jumping motion is divided into three phases of a standing phase, a soaring phase and a falling collision phase; on the basis of variable constraint dynamics, the system establishes a standing phase dynamics equation by using a space floating base, performs optimization research on jumping gesture and load matching by using the inertia matching and direction manipulability and uses five polynomial to plan jumping motions. The simulation and experiment show that when the inertia matching of the jumping robot is maximal, the reaction impulse of the ground is maximal, and the jumping performance is optimal; the jumping height and the inertia matching are in direct proportion; and when the inertia matching is maximal, the jumping gesture of the robot and the load matching are optimal. The inertia matching is an effective jumping motion optimization method.

The invention provides an emergency vehicle priority signal control method based on phase difference progressive and circulatory coordination, and particularly provides a signal control strategy based on phase difference progressive and circulatory coordination. The signal control strategy is combined with an emergency vehicle priority signal control strategy for emergency vehicle priority signal control, and an emergency vehicle priority signal timing conversion control strategy and a dynamic phase difference calculation method are provided. In a city road system composed of intersections, three emergency vehicle signal control strategies are adopted for micro simulation experiments, results show that emergency vehicles can safely pass the intersections without stopping by adopting the emergency vehicle priority signal control strategy for control after phase dynamic circulatory and progressive fine adjustment of each intersection, and effect of causing minimum influence on non-emergency vehicles is realized.

The invention discloses a method for processing experimental data of dynamic capillary effect evaluation experiments of an oil reservoir, and the method comprises the following steps: (1) arrangement of basic parameters; (2) determination of rock core average water saturation and average oil saturation; (3) determination of dynamic capillary force, to be more specific, in-situ dynamic capillary force detected at each point is corrected, the geometric center of a rock core, an oil phase and a water phase is determined, essence phase average oil phase pressure <Po> and water phase pressure <Pw> are calculated, and the dynamic capillary forceis determine; and (4) determination of oil phase and water phase dynamic relative permeability, to be more specific, effective water saturation is calculated, center water saturation point with water saturation of Sp in capillary pressure curve is taken, the capillary pressure corresponding to the water saturation Sp is P, logarithmic coordinate slope (F) of the point is calculated, parameter m can be obtained by Genuchten model fitting, and water phase dynamic relative permeability (Krw) and oil phase dynamic relative permeability (Kro) can be calculated respectively.

The invention relates to a method for separating and purifying exenatide on a large scale and in particular relates to a method for separating and purifying exenatide by utilizing a reversed-phase high performance liquid chromatography (RP-HPLC) on a large scale, and the method can be used for solving the problems of high cost, low yield, long production period and the like caused by utilizing the RP-HPLC to separate and purify the exenatide. The method comprises the following steps: 1) dissolving crude exenatide in an acetic acid-acetonitrile aqueous solution, carrying out ultrasonic processing and membrane filtration, and then taking out filtrate for later use; 2) separating and purifying a filtrated crude product by using a high performance liquid chromatograph; 3) carrying out decompressed rotary evaporation and concentration on a 98.5% target peptide solution which is separated and purified, and collecting concentrated liquid for later use; 4) processing the concentrated liquid through a reversed-phase dynamic axial compression column so as to convert the concentrated liquid into acetate by using an ion exchange method; and 5) carrying out decompressed rotary evaporation and concentration and freeze drying on qualified acetate so as to obtain a white flocculent powder product, and inspecting the powder product so that a final product is obtained after qualification. The method for separating and purifying the exenatide provided by the invention is suitable for industrial separation and purification of exenatide.

The invention discloses a two-phase dynamic holographic device based on a polarization-sensitive metal nano antenna. The two-phase dynamic holographic device comprises a polarizer, a first liquid crystal layer, the polarization-sensitive metal nano antenna, a second liquid crystal layer, a polarization detector and a receiving screen, wherein the polarizer is used for converting light of a light source into a linearly polarized light; the linearly polarized light is emitted in a polarized state after passing through the first liquid crystal layer; polarized light generates a scattered light component perpendicular to incident polarization through a polarization-sensitive metal nano antenna layer; emergent light of the polarization-sensitive metal nano antenna layer sequentially passes through the second liquid crystal layer and the polarization detector to generate a polarization component with phase information; screened light finally reaches the receiving screen to form a needed holographic image; and the first liquid crystal layer and the second liquid crystal layer are 90-degree twisted nematic type liquid crystals. The two-phase dynamic holographic device is low in modulating voltage, is high in resolution, solves the defect that conventional dynamic hologram has difficulty in realizing fast refreshing and large-area displaying integrating through independent amplitude and phase control, and has very good development and application potential.

The invention discloses a design method for achieving CPU power supply phase dynamic adjustment. According to the method, a CPU circuit comprises three sections of a current detection section, a control section and a CPU power supply section, wherein the current detection section is used for detecting CPU power supply current, the control section is used for controlling the opening and closing of each phase circuit, and the power supply section is used for supplying corresponding current and voltage to a working CPU. The conversion efficiency of the power supply circuit is related to load, namely the greater the load is, the higher the conversion efficiency is, and the conversion efficiency of the power supply circuit is improved by reducing the number of power supply phases and increasing the load of the remaining phases when the CPU is at low load. The design method for achieving CPU power supply phase dynamic adjustment achieves the purpose of energy saving of a main board through dynamic adjustment of the number of the CPU power supply phases by changing multi-phase power supply of the CPU power supply circuit into single-phase or double-phase power supply when the CPU is in low-load operation for improving the conversion efficiency of the CPU power supply circuit.

The invention relates to a fireproof intelligent circuit breaker for dynamic detection, static detection and zero cutoff, which is formed by electrically connecting an air circuit breaker connected in a three-phase load circuit and an intelligent control protection circuit, wherein the signal sampling end of the intelligent control protection circuit is connected to the three-phase load circuit, and the output end of the intelligent control protection circuit is connected to a tripping coil of the air circuit breaker through a microcomputer main control unit circuit; and the intelligent control protection circuit comprises a three-phase high-current split phase zero passage cutoff circuit, an inter-phase dynamic-static impedance detection and short-circuit protection circuit, a zero phase dynamic-static impedance detection and short-circuit protection circuit and a phase-ground dynamic-static impedance detection and leakage protection circuit. The fireproof intelligent circuit breaker solves the problem of three-phase high-current split phase zero passage cutoff, solves the problem of running dynamic impedance detection and protection problem of distribution and supply power grids, and eliminates the hidden danger of short circuit and electric leakage of the load end when a switch is not switched on.

The embodiments of the present invention disclose a traffic signal control method, a traffic signal control apparatus, an electronic device and a computer readable storage medium and belong to the field of intelligent traffic technologies. With the traffic signal control method, the traffic signal control apparatus, the electronic device and the computer readable storage medium adopted, traffic signal control accuracy can be improved. The traffic signal control method includes the following steps that: traffic parameters included in intersection road video stream data are extracted, and the phase dynamic weights of the phases of an intersection road are calculated according to the traffic parameters; the phase integrated weights of the corresponding phases are calculated according to the phase dynamic weights of the phases and obtained phase static weights; and green lamp lasting time of the corresponding phases is calculated according to acquired period durations and the phase integrated weights of the phases. The invention belongs to the traffic signal control.

The invention discloses a steady-state and dynamic characteristic equivalent circuit and method of a single-sided liner induction motor for traffic actuation. According to the invention, on the basis of one-dimensional model of the motor, an air gap magnetic flux density equation is established; an air gap and all field quantities and complex powers in a guide plate are solved by combining a primary current and a boundary condition; and then a field circuit complex quantity power equal principle is utilized to deduce a secondary resistance value and an excitation reactance value, thereby establishing a single-phase equivalent circuit. Five correction parameters are used for respectively correcting influences on the secondary resistance value and a mutual inductance value by a longitudinal end effect, a horizontal edge effect and a semi-filling groove. On the basis of the principle of power conservation and coordinate transformation, a two-phase dynamic equivalent circuit is also constructed. Because of utilization of the correction coefficients, influences on the motor mutual inductance, the primary resistance, the air gap equivalent magnetic potential and the equivalent air gap length by the longitudinal end effect, the horizontal edge effect, the semi-filling groove, and the air gap magnetic circuit saturation can be effectively corrected; the steady-state and dynamic driving characteristics of the liner induction motor can be represented accurately; and the steady-state and dynamic driving analyzing difficulty of the liner induction motor can be substantially reduced.

An embodiment of the invention relates to the technical field of information processing, and discloses a dynamic modulation method for a phase of a terahertz wave. The method comprises the following steps that a predesigned modulation pattern is generated by utilizing a spatial light modulator; pump light is irradiated on a semiconductor through the modulation pattern, and carrier distribution isgenerated on the semiconductor; the carrier distribution generates electric conductivity distribution, so that the semiconductor has metallic properties; and an initial terahertz wave irradiates the semiconductor, and the phase is modulated by the semiconductor to obtain a target terahertz wave, wherein the modulation pattern comprises a plurality of structural units which are arranged in a discrete manner. According to the embodiment, the different modulation patterns are dynamically generated, so that a pure-phase dynamic modulation metasurface for the terahertz wave is realized, the modulation pattern adopts a geometrical phase modulation method, the modulation mode is simple, the modulation effect is stable, and continuous, fast and accurate modulation of the phase is realized while the same amplitude modulation is guaranteed.

This invented multiple-phase dynamic cushion comprises a frame, at least a driving source, at least a transmission assembly, and clusters of plural strips interleaved in parallel. Taking a two-phase embodiment as an example, the two-phase strips interleave with each other, in parallel, to form the cushion's surface and alternate their tensions in turn; when one phase's strips periodically tighten to support the user's body, the other phase's strips will loosen, allowing the user's body covered by the loosened strips to take a rest, averting a pressure-ulcer risk. The driving source is energized by an altering energy, making the two strip groups alternate in loosening and tightening states periodically in turn. This invention can be converted into a portable dynamic chair when the four holes on the bottom of its four corners are inserted with legs; it can also be converted into a dynamic support for a lying human body.

A method of operating a magnetic resonance imaging system (10) with regard to acquiring multiple-phase dynamic contrast-enhanced magnetic resonance images, the method comprising steps of acquiring (48) a first set of magnetic resonance image data (x_pre) prior to administering a contrast agent to the subject of interest (20), by employing a water/fat magnetic resonance signal separation technique, determining (52) a first image of the spatial distribution of fat (I_pre) of at least the portion of the subject of interest (20), acquiring (50) at least a second set of magnetic resonance image data (x₂) of at least the portion of the subject of interest (20) after administering the contrast agent to the subject of interest (20), by employing a water/fat magnetic resonance signal separation technique, determining (54) at least a second image of the spatial distribution of fat (I₂^ph) of at least the portion of the subject of interest (20), applying (56) an image registration method to the second image of the spatial distribution of fat with reference to the first image of the spatial distribution of fat (I_pre) for correcting a potential motion of the subject of interest (20); and a magnetic resonance imaging system (10) having a control unit (26) that is configured to carry out steps (56-64) of such a method; and a software module (44) for carrying out such a method, wherein the method steps (56-64) to be conducted are converted into a program code that is implementable in a memory unit (30) and is executable by a processor unit (32) of the magnetic resonance imaging system (10).

Systems and methods for measuring phase dynamics and other properties (e.g. intracranial pressure) are disclosed. For example, the system may generate a reference waveform and a measurement waveform using digital synthesizers, each waveform having an identical constant frequency but also a relative phase shift. Next, system may send a tone-burst, via a transducer, into a sample (e.g. a skull or a bonded material), and then receive a reflected tone-burst in response. Then, a phase difference between the received tone-burst and the measurement waveform may be determined with a linear phase detector. Next, the phase shift of the measurement waveform may be adjusted, by the determined phase difference, such that there is no longer any phase difference between the received tone-burst and the adjusted measurement waveform generated by the appropriate digital synthesizer. A similar adjustment may occur after subsequent tone-bursts, allowing accurate monitoring of continuously variable phase relationships.

An output L1/L2 staging latch has dual rail inputs that up date the state of the L1 latch whenever the inputs are valid. Static outputs of the L1 latch are latched into the L2 by the L2 clock signal. The L2 latch has a static output that is available immediately, and a dual rail dynamic output whose timing is controlled by a clock signal.

Based on the importance of first contact miscibility pressure parameters of a co2/oil phase system and the lack of current measurement methods, the present invention provides an intuitive and flexiblemeasurement method that satisfies the requirements for efficient and accurate testing of the first contact miscibility pressure parameters. In the measurement method, CO2 is injected into a pressurevessel to form a surrounding phase during experiments, after stabilization, an oil phase is injected into the pressure vessel at a constant flow rate, the injection process is taken by a CCD camera, and a computer is used for screenshot. A 10% rule is adopted, namely, a region where a local image gray value differs from an average image gray value by more than 10% does not exceed 10% of the totalarea in a frame, a tendency to be unified of physical parameters in the region is determined, the influence of an interphase mass transfer process on a two-phase dynamic miscibility process is negligible, and reach of a first miscibility point of CO2/oil phase can be determined. Attached figures show changes of different interface phenomena under different pressures, and the rightmost figure is the first miscibility state. The pressure of a pressure gauge at the time of the first miscibility state is record, and the pressure is the first miscibility pressure of the oil phase.

The invention provides a method for acquiring a contact angle of gas-liquid two-phase dynamic displacement images in micron capillary tubes. The images of gas-liquid two-phase dynamic displacement process in micron capillary tubes are obtained by microscope and then transformed into binary images. The boundary coordinate points of the image were extracted by using the connected region method through the color of pixels. The distribution trend of coordinate points of the phase interface and the two wall surfaces is initially determined, and then the coordinate points of the phase interface andthe two wall surfaces are initially divided. After the cubic polynomial fitting of the coordinate points of the phase interface, the cubic function is obtained, and the first-order function fitting ofthe coordinate points of the two walls is performed to obtain two corresponding expressions, and the exact coordinates of the two end points of the phase interface can be obtained after the solution,that is, the contact angles of the two end points of the phase interface can be obtained. The invention has the advantages of strong robustness, stable measurement results, strong fault tolerance andaccurate measurement results for images with poor quality.

The three-phase system and single-phase system online direct interconnection technique relates to a power system. Turns and wiring methods of a three-phase transformer are changed based on the three-phase transformer. A split-phase dynamic reactive power compensation equipment is utilized to enable the three-phase system and single-phase system online conversion device to be directly connected with an independent three-phase system and an independent single-phase system. Requirements for guaranteeing running symmetry degree of the three-phase system can be met when two systems are in power exchange, and harmonious interdependence relation between the three-phase system and the single-phase system can be established.