32results about How to "Precise modulation" patented technology

The embodiment of the present application discloses a solid nanopore perforation control method based on laser and pressure modulation. One embodiment of the method includes: performing micro-nano preparation of a solid nanopore chip, performing underwater infiltration on the solid nanopore chip, building a nanopore chip test system with a confocal optical system, irradiating the surface of a solid membrane of the solid nanopore chip with laser, determining nanopore positions of the solid nanopore chip by ion current change, controlling the perforation of an object through changing control conditions, and when the nanopores are blocked, irradiating the nanopores through laser to decompose and remove pollutants. The method ensures the measurement signal-to-noise ratio and the capture rate,realizes reversible transition of the adjustment process and has a good application value. The method can effectively utilize the high-power laser irradiation to decompose and remove the surface pollutants of the nanopores, is simple and fast and ensures the long service life of the nanopore.

The invention discloses a multi-DC motor forward series control system and method, wherein 2*(n+1) IGBT modules are connected in series in pairs to form n+1 bridge arms; the n+1 bridge arms are connected in parallel with positive and negative poles of a DC power supply, and n DC motors which are serially connected in a forward manner are respectively connected in series with the n+1 bridge arms; the n DC motors are connected to a reference voltage synthesizer through two-stage PI controllers via a speed sensor, a current sensor and a speed adjustment module in sequence, and the reference voltage synthesizer is connected to n+1 phase inverters by a PWM pulse generating unit; the n+1 phase inverters are connected to the reference voltage synthesizer via current regulating modules and one-stage PI controllers, and are connected to the PWM pulse generating unit through the reference voltage synthesizer; and pulse control signals generated by the PWM pulse generating unit control the on/offof the 2*(n+1) IGBT modules to drive the n DC motors. The number of circuit elements is small, the structure is simple, the performance stability is reliable, and the wide use value is achieved.

The invention provides a texture compression and synthesis method with fine granularity and high compression rate, wherein the compression method comprises the following steps: generating an MIPMAP with low resolution; dividing the MIPMAP with low resolution into a plurality of basic compression units; generating basis color data and modulation data on each basic compression unit; and forming all texture compression blocks into texture compression data. The synthesis method comprises the following steps: carrying out linear interpolation on basic color and adjacent basic color data in each compression block to generate temporary intermediate basic color data; taking out the modulation data; modulating the intermediate basic color data to construct basic units; combining all generated basic units to construct the MIPMAP with low resolution; and carrying out bilinear interpolation on the generated MIPMAP to construct a target texture map with high resolution. The invention has the advantages that different modulation modes are suitable for different occasions and the compression quality is excellent; and the modulation data are directly saved in the compression block.

The embodiment of the invention discloses a downlink adaptive modulation and coding method and device which are used for more accurately scheduling a downlink modulation and coding scheme. The downlink adaptive modulation and coding method comprises the steps of acquiring a channel quality indicator fed back by each terminal in a cell; acquiring historical scheduling information recorded by an adjacent cell of the cell; according to the historical scheduling information, classifying the channel quality indicators according to different interference modes of the adjacent cell; calculating a compensation value of the channel quality indicator between every two different interference modes and types; acquiring the current interference modes of all the adjacent cells; respectively compensating the channel quality indicators by utilizing the compensation values of the channel quality indicators corresponding to the types of the current interference modes of all the adjacent cells to schedule the downlink modulation and coding scheme.

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.

The invention discloses a light-emitting assembly and a light-emitting module. The light-emitting assembly comprises a signal conversion module and a light-emitting unit. The light-emitting unit comprises a first switch module, a light-emitting element and a second switch module, the first end of the first switch module is connected with the signal conversion module, and the second end of the first switch module is connected with the first power supply end; the light-emitting assembly and the second switch module which are connected in series are arranged between the third end of the first switch module and the second power supply end; the signal conversion module is used for converting a target display signal representing image information of a to-be-displayed image block corresponding tothe light emitting unit into a first display signal; wherein the first display signal is used for controlling the third end of the first switch module to output a second display signal in a pulse width modulation form corresponding to the first display signal, and the second display signal is used for controlling the brightness of the light-emitting element under the condition that the scanning end controls the second switch module to be in an on state. The accuracy of brightness control of a light-emitting element can be improved.

The invention provides a display device. The display device comprises a blue backlight source and a display panel, wherein the blue backlight source can emit blue light; the display panel is arrangedon the light emitting side of the blue backlight source, and comprises an array substrate, a liquid crystal layer and a color film substrate which are arranged in a stacked mode, wherein the liquid crystal layer is composed of a cholesteric liquid crystal and can be used for regulating and controlling blue light; the color film substrate comprises a red color film layer, a green color film layer and a blue color film layer which are arranged on the same layer, wherein the red color film layer and the green color film layer are photoluminescence layer; the red color film layer emits red light under the excitation of the blue light; the green color film layer emits green light under the excitation of the blue light, wherein the display device does not comprise an upper polaroid and a lower polaroid. According to the display device provided by the invention, the blue light modulation effect of the liquid crystal layer formed by the cholesteric liquid crystal is more accurate than that ofwhite light, so that the two sides of the display panel do not need to be provided with polaroids respectively, and the light emitting control of the display device also can be realized, and thereforethe light emitting efficiency of the display device can be greatly improved.

The invention discloses a control system and method with three direct-current motors in forward-direction serial connection. The system is characterized in that eight IGBT modules form four bridge arms in a two-two serial connection manner, the four bridge arms are parallelly connected to the positive electrode and the negative electrode of a direct-current power supply, the three direct-current motors in forward-direction serial connection are serially connected with the four bridge arms, the three direct-current motors are connected with a reference voltage synthesizer sequentially through aspeed sensor, a current sensor, a speed adjusting module and a secondary PI controller, the reference voltage synthesizer is connected with a four-phase inverter through a PWM pulse generating unit,the four-phase inverter is connected with the reference voltage synthesizer through a current adjusting module and a primary PI controller, the four-phase inverter is connected to the PWM pulse generating unit through the reference voltage synthesizer, and pulse control signals generated by the PWM pulse generating unit controls the on and off of the eight IGBT modules to drive the three direct-current motors to operate. The control system is few in used circuit components, simple in structure, stable and reliable in performance and worthy of popularization and application.

The invention discloses a light-emitting assembly and a light-emitting module. The light-emitting module comprises light-emitting assemblies arranged in an array mode, and each light-emitting assemblycomprises a signal conversion module, a light-emitting element and a switch module, wherein the light-emitting element and the switch module which are connected in series are arranged between the first power supply end and the second power supply end; the signal conversion module is connected with the switch module, and the signal conversion module is used for converting a target display signal into a display signal in a pulse width modulation form; the display signal in the pulse width modulation form is used for controlling the on-off state of the switch module so as to control the brightness of the light-emitting element; the target display signal is used for representing image information of the to-be-displayed image block corresponding to the light-emitting assembly. According to thelight-emitting component and the light-emitting module provided by the embodiment of the invention, the accuracy of controlling the brightness of the light-emitting component can be improved.

The invention discloses an electrical connector with an adjustable phase. The electrical connector comprises an interface main body, a tail main body and a jackscrew, wherein the interface main body comprises an inner conductor, an interface main body insulator and an interface main body housing which are fixedly connected from the inside to the outside; a non-split groove end of a matching bushing is pressed into the biggest stepped hole of the interface main body housing in an interference fit manner; the biggest stepped hole of a phase modulating screw barrel is connected with an outline step of the interface main body housing in an interference fit manner, i.e., the inner conductor, the interface main body insulator, the interface main body housing, the matching bushing and the phase modulating screw barrel are fixed relative to one another; the tail main body comprises a jack, a tail main body insulator and a tail main body housing which are fixedly connected in sequence from the inside to the outside; a bushing is pressed into the biggest step hole of the tail main body housing in an interference fit manner and the tail main body insulator is axially fixed, i.e., the jack, the tail main body insulator, the tail main body housing and the bushing are fixed relative to one another; and the phase modulating screw barrel is screwed in the bushing in a threaded connection manner and the interface main body is connected with the tail main body. The inner conductor and an outer conductor always keep continuous matching of impedance in the phase modulating process.

The present invention relates to a system for modulating laser pulses (3) by means of an electro-optical modulator (4) which is operated by means of a pulsed modulation voltage (5). A voltage converter (12) mounted upstream of the modulator (4) converts a pulsed modulated switching voltage (13) at an output voltage level to the modulation voltage (5) that is higher than the output voltage level. The invention further relates to a method for modulating laser pulses (3).

The invention discloses a liquid crystal optical device based on a digital microscope component, which comprises a light source system, a digital microscope component, a computer control system, an imaging system, a liquid crystal layer and a liquid crystal control system, wherein the light source system is used for forming parallel light, the digital microscope component receives the parallel light and generates a plurality of beams of diffracted light, the computer control system is used for controlling the digital microscope component, the imaging system converges the diffracted light and coheres and superposes the diffracted light to form modulation figures, the liquid crystal layer receives the modulation figures, and the liquid crystal control system is used for applying driving voltage to the liquid crystal layer. The invention can modulate the liquid crystal layer accurately and quickly.

In the present invention, transposition and complementing for envelope signal can be achieved by utilizing trigonometrical function transform when 90 degree, 180 degree and 270 degree set for carrier right angle phase is changed-over to zero degree phase so that problem which there is no function of right angle phase and no function of processing ability for carrier output in some synthesizers of single chip direct digital frequency type can be solved.

The invention relates to a multi-degree-of-freedom quantum key distribution silicon-based transmitting end chip which comprises an intensity compensation module, a third multi-mode interference coupler, a decoy state intensity modulation module, an optical switch module, a phase encoding module, a polarization encoding module, an attenuation monitoring module and a synchronous optical path, wherein the intensity compensation module is connected with the third multi-mode interference coupler, the third multi-mode interference coupler is connected with the decoy state intensity modulation module, the decoy state intensity modulation module is connected with the optical switch module, the optical switch module is connected with the phase encoding module and the polarization encoding module respectively, and the phase encoding module is connected with the attenuation monitoring module. The phase encoding module and the polarization encoding module are integrated on one chip at the same time, thus stable and safe multi-intensity modulation can be achieved, and multiple encoding modes are achieved.

The invention discloses an optical system for generating Mathieu light beams by utilizing partially coherent light. The optical system comprises an optical platform, an LED light source is arranged onthe optical platform, and a diaphragm, a collimating beam expanding system, an elliptical aperture and an axicon are sequentially placed along the light path of an LED. According to the optical system, a non-coherent light source and the LED light source can be used for generating the diffraction-free Mathieu light beams, and a new mode and a more effective way are provided for research of Mathieu light beams. The optical system involves few optical elements, and is simple in structure and easy to construct, debug and operate. The Mathieu light beams show great potential in the directions ofimaging, scanning and the like, and the non-coherent light serves as the light source, so that the research field of the Mathieu light beams is expanded. Therefore, the optical system has wide marketprospects in practical application.

The invention provides an intelligent precise preparation system and method for immature soil for landscaping. The intelligent precise preparation system comprises an original soil feeding bin, an auxiliary material feeding bin and a stirring and mixing bin. The original soil feeding bin is further provided with a soil parameter acquisition device, the soil parameter acquisition device is electrically connected with the industrial personal computer, the industrial personal computer is provided with a preparation database, and soil preparation parameters are given according to parameters acquired by the soil parameter acquisition device; a weighing device, a laser volume scanning device and a weighing sensor are further arranged; the weighing device, the laser volume scanning device and the weighing sensor are electrically connected with the PLC, the PLC is electrically connected with the industrial personal computer, and the PLC is electrically connected with the feeding device, the quantitative feeding device and the trace raw material supply device. The original soil feeding bin, the auxiliary material feeding bin and the stirring and mixing bin are matched with the intelligent control system, so that accurate preparation of each component can be ensured. The prepared soil is high in uniformity, the basic physicochemical property is obviously improved, and the soil enzyme activity, the number of beneficial microorganisms, the microbial diversity and the like are also obviously improved.