44results about How to "Realize continuous control" patented technology

The invention belongs to the antenna technical field and specifically relates to a frequency-and-pattern-reconfigurable antenna based on a liquid crystal material. The frequency-reconfigurable antenna comprises a liquid crystal phase shifter, a liquid crystal microstrip antenna and a one-to-four power divider. By combining the electrical regulation and control characteristic of the liquid crystal material and the design of the frequency-and-pattern-reconfigurable antenna, the frequency-and-pattern-reconfigurable antenna based on the liquid crystal material is produced, so that the frequency of the antenna can realize continuous regulation, tuning range is large and wave beams are deflectable; and practical application of the frequency-and-pattern-reconfigurable antenna in the aspects of miniaturization and broadband is improved.

The invention discloses a method for photothermal conversion based on vertical-structure graphene growing on a common soda-lime glass substrate. The technical method comprises the following steps that graphene glass is prepared, wherein the graphene layer height in the graphene glass is 1-100 nm. A preparation method of the graphene glass comprises the steps that the substrate is provided, the glass substrate is put in a plasma reaction cavity, a carbon source is subjected to splitting decomposition to produce plasma, the plasma precipitates on the glass substrate to obtain the graphene glass, and the temperature of the plasma reaction cavity in the precipitating process is 500-600 DEG C. Compared with other photothermal conversion devices, a graphene nano-sheet having a special structure and perpendicular to the glass substrate can be obtained without special structural design. Under the irritation of sunlight, the surface temperature of the glass substrate can be increased from 25 DEG C to about 58 DEG C, and very high photothermal conversion efficiency is displayed.

The invention provides a phase mask plate of an integer-order vortex beam with a fractional-order vortex profile. A generated novel vortex beam simultaneously has the topological charge of the integer-order vortex and the light intensity profile of the fractional-order vortex. The phase mask plate generates a vortex beam by inputting the phase mask plate into a reflection type spatial light modulator, wherein the transmission rate function expression of the phase mask plate is a formula which is as shown in the specification, wherein A (x, y) is an amplitude modulation function and is used forchanging the profile of the incident coherent light field so as to improve the quality of the vortex beam and avoid the interference of a phase modulation signal and an amplitude modulation signal; ang (.) is an angle-solving function of an imaginary number; rem (.) is a complementary function; m is the topological charge value of the beam, and n is a phase step factor, wherein n is greater thanm; the phase step can be compressed by changing the value of n, so that the required phase step size is generated; theta is the polar angle of a polar coordinate system; and 2 <pi>x/d is a blazed grating item, and is used for generating a blazed grating with a period of d, so that the energy is concentrated in +1 stage diffraction.

The invention discloses a method for refining gamma-TiAl alloy by accurately controlling metastable structure stabilization, the gamma-TiAl alloy comprises the following components in atomic percent: 47.0%-48.5% of Al, 1.0%-2.5% of Nb, 0.0%-2.0% of Cr, 1.0%-3.0% of Ta, 0.01%-0.1% of B and the balance of Ti, and the method comprises the following steps: 1, preparing a gamma-TiAl alloy ingot; 2, carrying out hot isostatic pressing and homogenization treatment; thirdly, heating and heat preservation are conducted in an alpha single-phase region and an alpha + gamma two-phase region in sequence, and the heat treatment process is circulated multiple times; and fourthly, heating and heat preservation are conducted in the alpha single-phase region, and the gamma-TiAl alloy of the fine-grain fully lamellar structure is obtained. According to the method, alloy element adding is combined with circulating heat treatment, the metastable structure is continuously regulated and controlled, grain refinement in the gamma-TiAl alloy is achieved, and the room-temperature plasticity, strength and other performance of the gamma-TiAl alloy are improved.

The invention relates to a method for preparing different colors of mixed phase nano TiO2. The key technology is carrying out thermal treatment on amorphous nano TiO2 which is synthesized by a water phase in one step at different temperature. The method concretely comprises the following steps: firstly, mixing and reacting a Ti(SO4)2 solution and ammonia water under an ice-water bath condition to obtain amorphous hydrate sol of TiO2, centrifugally washing, and then evaporating the sol at low temperature, so as to obtain amorphous phase nano TiO2; respectively carrying out thermal treatment on evaporated amorphous phase nano TiO2 solid at different temperature, so as to obtain different colors of amorphous and anatase mixed-phase nano TiO2. A series of different colors of mixed phase nano TiO2 can be prepared by adopting a gradient heat treatment method for the first time. The method is simple to operate, available in raw materials, low in cost and friendly to environment. Continuous regulation of an energy band structure is achieved by the prepared different colors of mixed phase nano TiO2, and the mixed phase nano TiO2 has excellent performances and positive significance in photocatalytic degradation of organic pollutants, and has a good application prospect.

The embodiment of the invention discloses a composite thermistor material based on a rare earth nickel-based oxide and a preparation method and application thereof, and belongs to the field of temperature sensors. The composite thermistor material comprises a rare earth nickel-based oxide and a thermistor material with a negative temperature resistance coefficient, and the resistivity of the composite thermistor material is from 10<-2> to 10<2> ohm.m. The low-resistivity composite thermistor material is obtained through interface control of two phases, electronic structure control, proportion control, mixing process control, sintering process control, and the like. Compared with the traditional thermistor material, the composite thermistor material disclosed by the invention has the characteristics of low resistivity and wide temperature range applicability, has a wide application prospect in the aspects of temperature compensation, surge current suppression and the like, and opens up a road for the development of miniaturization and low dimension of thermistors.

The invention discloses a dynamic polarization regulation and control device based on an anisotropic chiral metamaterial. The dynamic polarization regulation and control device is composed of a metal reflecting layer, a layer of refractive index adjustable material and a layer of chiral structure (planar anisotropic structure). Mainly based on the microcavity interference effect, adjustable materials with different refractive indexes are filled in the microcavity between the planar anisotropic chiral metamaterial and the metal reflecting layer, external excitation (such as electricity, light, heat, humidity and the like) is applied to the refractive index adjustable materials, the refractive index of the materials is dynamically adjusted, the interference effect of the microcavity is changed, and thus, continuous regulation and control among linearly polarized light, elliptically polarized light and circularly polarized light are realized. The device has the advantages that polarization regulation and control are convenient, the device size is small, the integration level is high, device processing is compatible with an existing integration process, and the working wavelength can be regulated and controlled at will from ultraviolet to millimeter wave bands. The dynamic polarization regulation and control device has wide application prospects in the fields of stereoscopic display, polarization illumination and the like.

The invention provides a method and system for producing a high-controllability off-axis optical bottle, and the method comprises the steps: simulating the interference between a plane wave and a round Pearl Gaussian beam through a computer, obtaining a phase hologram, and loading the phase hologram to a reflective spatial light modulator; drawing a composite second-order chirp vortex phase on a computer according to the optical parameters, and loading the composite second-order chirp vortex phase to a transmission-type spatial light modulator; irradiating a reflective spatial light modulator by using a Gaussian beam, enabling reflected light to pass through a spatial filtering system, and selecting positive first-order stripes to obtain a round Pearl Gaussian beam; a circular Pearl Gaussian beam passes through a transmission-type spatial light modulator to obtain a circular Pearl Gaussian beam subjected to composite second-order chirp vortex phase modulation, and the circular Pearl Gaussian beam is transmitted in vacuum or interference-free air, so that strong focusing can be formed for multiple times in the transmission process, and an off-axis optical bottle is formed. The method and system can continuously regulate and control the off-axis optical bottle, is more efficient in the aspects of particle capture and control, and is high in degree of freedom.

The invention discloses a near-infrared band linear thermo-optic adjustable ultra-narrow band absorber based on four-nanocolumn coupling oscillators, which belongs to the technical field of superstructure material absorbers. The absorber comprises multiple periodic structural units. Each periodic structural unit is of a three-layer structure, wherein the bottom layer is a metal film, the middle layer is a dielectric film, and the top layer is an oscillator formed by coupling four nano-columns made of amorphous silicon. By adopting the four-nano-column coupled amorphous silicon oscillators, theabsorber can form an ultra-narrow absorption band in the near-infrared band, and thus, the design of a near-infrared band linear thermo-optic adjustable ultra-narrow absorber is realized. The absorber of the invention can be applied to micro optical switches, optical regulators and infrared camouflage.

The invention discloses a submicron or micron monodisperse single crystal conductive gold ball and a preparation method thereof. The preparation method comprises the following steps that a small-size monodisperse single crystal conductive gold ball colloidal solution is adopted as a seed solution; chloroauric acid and poly (diallyldimethylammonium chloride) are added into the seed solution, stirring is conducted at a room temperature for 2 hours, and reacting is conducted at 180 DEG C-200 DEG C for 1 hour-2 hours to prepare a single crystal gold nano octahedral colloidal solution; a polishing agent is added into the single crystal gold nano octahedron colloidal solution, and reacting is conducted at 100 DEG C for 5 hours to prepare a monodisperse single crystal conductive gold ball colloidal solution with the enlarged size; and the monodisperse single crystal conductive gold ball colloidal solution with the enlarged size is adopted as a seed solution, the above seed solution treatment step is executed again, and iteration is carried out until the size of the single crystal conductive gold ball reaches a preset requirement. The conductive gold ball is uniform in size and good in monodispersity, the preparation technology is simple and easy to operate, the requirement for instruments and equipment is low, and complex and expensive instruments do not need to be used.

The invention relates to an explosion-proof solar sector cold protection gate capable of rotating by 360 degrees. The explosion-proof solar sector cold protection gate capable of rotating by 360 degrees is suitable for stock bin truck loading of various sorts of ore, coal, ash, chemical products, cement, sand and other bulk materials and can achieve truck loading operation particularly under the condition that the outside environment temperature is extremely low. The explosion-proof solar sector cold protection gate comprises an explosion-proof solar cell system, an explosion-proof solar heating system, a stock bin, a stock bin warm-keeping interlayer, a movable cold protection bulkhead gate support assembly, a gate middle connecting section, a middle connecting rotation drive assembly, a rotation feeding section and a combined sector gate assembly. The explosion-proof solar cell system and the explosion-proof solar heating system are arranged outside and inside the stock bin warm-keeping interlayer. The movable cold protection bulkhead gate support assembly is installed on a discharging bin opening of the stock bin and the interlayer outer wall and further comprises a warm-keeping roller bulkhead gate, a support and an electric-hydraulic pusher. The combined sector gate assembly comprises a combined sector gate, a hydraulic power unit and a hydraulic cylinder.

The invention discloses a polymer network topology heterogeneous system based on dynamic covalent bonds. The polymer topology heterogeneous network system is a cross-linked polymer containing the dynamic covalent bonds, and the topology structure in the polymer topology heterogeneous network system is in a thermodynamic unsteady state temporarily fixed by the dynamic covalent bonds; and when the action and the temperature of a bond exchange catalyst reach the activation temperature of the dynamic covalent bonds or above, the dynamic covalent bonds are subjected to a bond exchange reaction, andthe topological structure is changed. The invention further provides an application method of the polymer network topology heterogeneous system based on the dynamic covalent bonds. The topological structure in the high-molecular network topological heterogeneous system provided by the invention can generate specific isomerism as required to realize regulation and control of related physical properties of the polymer, and the isomerism process of the topological structure can be carried out regionally step by step for multiple times.

The invention relates to a PMAA and PAA base hydrogel which has a sequential lamellar structure and is prepared from aryl monomer having a pi-pi accumulation function and carboxyl monomer having a hydrogen bond function. The hydrogel of the invention controls a drug release system by a hydrogen bond and a pi-pi accumulation biswitch and realizes continuous regulation of drug release; the gel swelling property test shows that the hydrogel of the invention has favorable pH responsiveness; the drug release experiment stimulating a human body metabolic system shows that the drug release control system prepared by the hydrogel of the invention can match drug release and the human body metabolic system and effectively reduces drug waste and side effect on the human body by excessive drug.