38results about How to "Realize active regulation" patented technology

The invention provides a near-beta ultrahigh-strength titanium alloy with the tensile strength of more than 1450 MPa. The volume fraction of a primary alpha phase in the near-beta ultrahigh-strength titanium alloy is 15-30%, and a secondary alpha phase is uniformly distributed on a beta matrix. The preparation method comprises the following steps: (1) determining a main component system of the novel ultrahigh-strength titanium alloy; (2) measuring the beta transformation temperature, performing cogging forging above the beta transformation temperature of a titanium alloy cast ingot, and then gradually reducing the forging temperature to below the beta transformation temperature for repeated upsetting-drawing forging; (3) setting the temperature of the finish forging process below the betatransition temperature to obtain an ultrahigh-strength titanium alloy forging stock; and (4) carrying out solid solution treatment and double aging strengthening treatment on the ultrahigh-strength titanium alloy forging stock in a hot working state to obtain the near-beta ultrahigh-strength titanium alloy with the tensile strength of more than 1450 MPa. The strength of the ultrahigh-strength titanium alloy is more than 1450 MPa, and simultaneously, the requirements for comprehensive performance such as good plasticity, good toughness and the like can be met.

The invention provides a variable-torsional-rigidity underwater tractor hydrofoil system for a glide. The system comprises a water surface floating body ship, a flexible cable, an underwater tractor, a hydrofoil rigidity adjusting system and a sensing unit, a spring is arranged in the underwater tractor to be connected with a hydrofoil, and the hydrofoil shows different pitching rigidities under different spring initial tensile forces, so that different propulsive forces are provided in waves. In the hydrofoil rigidity adjusting system, a motor and a rope are arranged, the movable end of the spring is pulled, and the tensioning force of the spring is adjusted, so that the rigidity of the hydrofoil is controlled, and finally different propulsive forces are obtained. A series connection structure is adopted, and the pitching rigidity of the multiple hydrofoils can be directly controlled through one motor. The sensing unit can sense information such as the flow speed and the pose and feed the information back to the control system, the control system further controls the pitching rigidity of the hydrofoil according to the feedback information, the speed of the wave glider is regulated and controlled, and then the optimal propelling performance of the underwater tractor is achieved.

The invention provides a modular suspended ceiling used for a modular radiant air conditioning system. The modular suspended ceiling comprises a plurality of plates, keels, hanging pieces and a control system. Grooves and protrusions used for inserted connection are formed in and arranged at the edges of the plates correspondingly. A heating module, a refrigerating module, a fresh air module or anilluminating module are embedded in the aluminum plates and connected with an external air conditioning pipeline or circuit. The heating module comprises a heat source pipeline, a heat source inlet,a heat source outlet, a third electromagnetic valve and a fourth electromagnetic valve which are arranged or formed in the aluminum plates. The refrigerating module comprises a cold source pipeline, acold source inlet, a cold source outlet, a first electromagnetic valve and a second electromagnetic valve which are arranged in the aluminum plates. The fresh air module comprises air supply outletsformed in the corresponding aluminum plate. The illuminating module comprises illuminating lamps arranged in the corresponding aluminum plate. The modular suspended ceiling provided by the invention has the beneficial effects that mounting is easy and fast, and maintenance is convenient; the cold source pipeline and the heat source pipeline are paved separately, and rooms can freely select refrigerating or heating according to needs; and by controlling the opening and closing sizes of the electromagnetic valves and air valves, and requirements for comfortableness of people in the rooms are met.

The invention provides an axial force checking, regulating and controlling system for a foundation pit servo steel supporting system and a method thereof, and the method is characterized in that a servo steel supporting system comprising a first movable joint, a first servo hydraulic system, a steel support, a second servo hydraulic system and a second movable joint which are connected in sequence is arranged on the inner side of an enclosure structure; horizontal distance measuring devices are arranged at the two ends of the first servo hydraulic system and the two ends of the second servo hydraulic system respectively, and a pressure measurement sensing device is installed on the first servo hydraulic system or the second servo hydraulic system; length deformation and axial force of the first movable joint, the first servo hydraulic system, the steel support, a second servo hydraulic system and the second movable joint in the servo steel support system are monitored in real time; deformation and axial force of the first movable connector, the first servo hydraulic system, the steel support, the second servo hydraulic system and the second movable connector inside are linked in real time, active regulation and control of the axial force of the servo steel support are achieved, and the problem of axial force loss of the steel support is effectively solved.

The invention belongs to the technical field of iron-based amorphous nanocrystalline alloys, and particularly discloses an iron-silicon-boron amorphous nanocrystalline composite microsphere material and a preparation method thereof. The selected alloy component is FexSicyBz, wherein x, y and z are atomic percentages of corresponding components, the x is equal to 75-78, the y is equal to 9-12, andthe z is equal to 100-x-y. The drop tube without container rapid solidification preparation method is adopted and comprises the following steps of weighing and preparation, master alloy smelting, sample installing, vacuumizing, heating and blowing, particle collecting, particle screening and the like, and an alloy microsphere with the grain diameter d being less than or equal to 120 microns are screened and collected. The method has the advantages that raw materials are easy to obtain, the amorphous preparation process flow is simple, the amorphous critical dimension is large, the prepared amorphous nanocrystalline composite microsphere material has the advantages of high strength, high hardness, wear resistance, corrosion resistance and the like, and the material can be applied to the fields of amorphous coatings, sensing elements, precision instruments, precision processing technologies and the like.

The invention belongs to a shape optimization design method of a forging forming preformed blank in the field of hot working. According to the technical scheme, based on ideal gradual change strain distribution of the double-performance disc final forging, gradient strain distribution of the forging serves as an objective function, and the forging filling rate and the material utilization rate serve as constraint conditions; and a method of combining Latin hypercube test design with a finite element numerical simulation technology is adopted to calculate and obtain sample data for establishinga target function and constraint condition approximate model and establishes a Kriging approximate substitution model, and is combined with a genetic algorithm to perform global optimal search to optimize the shape of a double-performance disc prefabricated blank. The shape optimization design method has the outstanding advantages that the gradient strain distribution of the final forging is usedas a target function; and the limitation that an existing preformed blank shape optimization design method is only suitable for homogeneous component preformed blank shape design is broken through, so that the filling rate and the material utilization rate can be increased, and forge piece dependent variable distribution and active regulation and control of internal microstructures can be achieved.

The invention discloses a method for eliminating laser welding pores of an aluminum-lithium alloy T-shaped joint, and relates to the field of material processing engineering. The method aims at solving the problem that pores are prone to occurring in the laser welding process of the aluminum-lithium alloy T-shaped joint. According to the method, a double-beam rotary laser welding head is adopted to realize the rotary motion of double light beams through an internal lens module, and the rotary motion can comprise the rotary motion of the double light beams around a self-axis and the rotary motion of the double light beams around a revolution axis; the rotating double light beams enable a keyhole to be more stable to a certain extent, and the keyhole is relatively not prone to being closed;meanwhile, the collapse of a keyhole wall is avoided due to the rotation effect of the double light beams, so that the formation of process pores is reduced; active regulation and control of molten drop transition can be realized through high-frequency rotation of two beams of laser during double-beam rotary laser welding; and meanwhile, the rotating laser beam can refine grains, so that the mechanical property of the aluminum-lithium alloy T-shaped joint is improved. The method is applied to the field of welding.

The invention provides a metasurface unit, a phase-adjustable metasurface with the metasurface unit and an optical system, and belongs to the technical field of metasurfaces. The metasurface unit provided by the embodiment of the invention comprises an electrode layer, an electric actuating layer and a nano structure, wherein the nano structure is a sub-wavelength structure; the electrode layers are arranged at the two ends of the electric actuating layer; the nano structure is arranged on one side, far away from the electric actuating layer, of the electrode layer; the nano structure is arranged on one side, far away from the electric actuating layer, of the electrode layer; and the electric actuating layer moves along the height axis direction of the nanostructure under the action of an electric field provided by the electrode layer. According to the metasurface unit, the phase-adjustable metasurface with the metasurface unit and the optical system provided by the embodiment of the invention, large-range and accurate phase adjustment of the phase-adjustable metasurface is realized through the electric actuating layer.

The invention discloses a damping device and method for restraining cutting chatter of a machine tool spindle and the machine tool spindle. Through a ball screw and a damping seat of a cylindrical structure, one end of the ball screw is arranged in a rotating groove, a ball screw nut is arranged at the open end of the damping seat, an ejector rod is fixedly connected to the end of the ball screw nut, the ejector rod slides in the axial direction under the cutting chatter effect of the spindle, the ejector rod drives the ball screw nut to slide in the axial direction, and the ball screw matched with the ball screw nut converts translation of the ejector rod into rotation, so that fan blades fixed to the ball screw are driven to rotate in a magnetorheological fluid, radial reciprocating vibration, caused by chatter, of a spindle system is converted into reciprocating rotation of the fan blades in the magnetorheological fluid through the ball screw and the fan blades, and vibration energy is dissipated under the action of damping force applied by the magnetorheological fluid. Damping of a machine tool system is changed, the structure is small and exquisite, and mounting is easy.

The invention discloses a one-dimensional periodic cushion vibration reduction ballast bed energy band structure simplified calculation and vibration isolation frequency band design method. The methodstarts from a wave equation of continuous state parameters under assumed conditions of a one-dimensional infinite periodic structure and infinite extension of a ballast bed along a line direction, obtains a transfer matrix of a single period in combination with a section continuous condition, obtains an analytical solution of an energy band structure curve by introducing a periodic boundary condition, determines a vibration isolation frequency band according to a forbidden band distribution range, and obtains the change rule of the forbidden band and the vibration isolation frequency band along with geometry and material parameters through influence factor analysis, so that active regulation and control of the forbidden band and the vibration isolation frequency band are achieved. According to the invention, the one-dimensional periodic cushion vibration reduction ballast bed energy band structure calculation and vibration isolation frequency band design method has the beneficial effects that a theoretical basis is provided for design and engineering practice of a periodic vibration reduction ballast bed; and the method is small in calculation amount, clear in theoretical basis and convenient to use, the calculation result can completely meet the requirements of engineering design, and the method has wide applicability.

The invention provides a full-life-cycle efficient extraction method for low-permeability reservoir coal series gas, and belongs to the technical field of low-permeability reservoir coal series gas extraction. The problem that the full-life-cycle extraction efficiency of the low-permeability reservoir coal series gas is low is solved; the method comprises the following steps of: establishing a reservoir geomechanical model by taking a low-permeability coal series reservoir which is developed in a vertical overlapping manner as an object, obtaining reservoir lithology, designing a coal seam mining process, analyzing an overlying strata deformation-damage-seepage spatio-temporal evolution law caused by coal seam mining, and arranging a special extraction working roadway for coal series gas at the top of a mining coal seam through comparison and optimization, a key layer fracturing process is designed, a key layer is actively broken, pressure relief disturbance on a coal series reservoir is formed together with coal seam mining, a nitrogen foam fracturing technology is combined, drill site and drill hole arrangement characteristics are designed, efficient rock breaking and permeability increasing of a multi-layer coal series gas-containing rock mass of the coal series reservoir are achieved, and on this basis, a coal series gas flow field evolution model is established; a dynamic efficient extraction method is designed; the method is applied to low-permeability reservoir coal gas extraction.

The invention relates to a femtosecond laser time shaping pulse active regulation and control method for realizing near field nanometer focusing, and solves the problems that a laser confocal resolution is insufficient, STED (stimulated emission depletion) depends on fluorescent materials, the regulation and control flexibility of the nanometer focusing of a surface plasma is poor and the like. The method comprises the following steps that: firstly, processing to obtain a graphene modified composite nanosphere material; then, utilizing a femtosecond laser time shaping optical system to decompose a femtosecond laser monopulse into one series of femtosecond laser pulse trains which are mutually separated on a time domain; and finally, adopting the obtained femtosecond laser pulse trains to irradiate the graphene modified composite nanosphere material, and generating a localized near field enhancement effect in a contact surface area of the graphene modified composite nanosphere materialand a target material. The method does not need to consider the structure and the dimension parameter of the graphene modified composite nanosphere, and the active regulation and control of a near field nanometer focusing process can be realized only by regulating and controlling the time and polarization combination and the energy distribution of multiple pulses in the femtosecond laser time shaping pulse.

The invention discloses a preparation method of a high-resolution structural color device, and relates to the technical field of structural color devices. The preparation method comprises the following steps: firstly, depositing a phase change material on a substrate, and annealing to obtain a substrate with a phase change material film layer; spin-coating photoresist on the upper surface of the phase change material film layer through spin-coating, trimming and drying equipment, drying, trimming, transferring a preset metasurface reverse structure pattern to the photoresist, and developing and exposing to obtain a metasurface structure pattern; a metal film is deposited on the metasurface structure pattern, and a mask structure is obtained through desolvation; and etching the mask structure, and removing the residual metal mask material to obtain the high-resolution structural color device with the metasurface structure. High-resolution, high-saturation and wide-color-gamut color display of the structural color device is achieved, the structural color display quality of the metasurface is improved, and the metasurface is not prone to being damaged and falling off; the method is suitable for the technical fields of multifunctional display, CMOS image sensors, ink-free color printing, information encryption and the like.

The invention relates to an additive manufacturing method of a metal glass lattice structure composite material part, and belongs to the technical field of additive manufacturing. A selective laser melting technology is adopted, laser process parameters are regulated and controlled, metal of different microscopic structures is formed at different positions, a lattice structure framework for regulating and controlling mechanical properties is embedded in a metal glass part, and forming of the metal glass and lattice framework integrated composite material part based on the same material is achieved. The lattice structure is applied to metal glass forming, microstructure units of a lattice structure model are established based on the topology theory, performance prediction is conducted on the lattice structure model through a homogenization method, and lattice structure parameters are optimized; by means of the method, large metal glass parts in any shape and with lattice structures can be directly formed in a near-net mode, the plasticity of the metal glass parts can be remarkably improved, the comprehensive mechanical property of the formed parts is improved, and the stability of the metal glass parts is enhanced.

The invention belongs to the technical field of medicines, and relates to a drug delivery system of combining a blood vessel blocking agent and a double-drug-loading bionic liposome, in particular to preparation of a platelet membrane fused bionic liposome co-carrying a photosensitizer and a hypoxia activation prodrug, and application of combination of the bionic liposome with the blood vessel blocking agent in regulation of tumor microenvironment and inhibition of tumor growth and metastasis. The platelet membrane fused bionic liposome co-carrying the photosensitizer and the hypoxia activated prodrug is a liposome containing a platelet membrane, the photosensitizer and the hypoxia activated prodrug, wherein the molar ratio of the photosensitizer to the hypoxia activated prodrug is 1:1 to 1:20, the drug-lipid ratio of the photosensitizer to the total lipid is 1:(50-500), and the drug-lipid ratio of the hypoxia activated prodrug to the total lipid is 1:(2-50). The double-drug-loading liposome disclosed by the invention is preferably a double-drug-loading liposome of a dinitroenzamide mustard derivative and pyropheophorbide a. The drug delivery system provided by the invention can promote the activation of the hypoxia activation prodrug, and realizes photodynamic therapy and hypoxia selective chemotherapy synergetic anti-tumor therapy.

The invention discloses a flexible interconnection substation optimization scheduling method based on B2B-MMC, and the method employs a back-to-back modular multilevel converter to replace different transformer substation main transformer 10kV bus interconnection switches, and builds a flexible interconnection substation optimization model. The method comprises the following steps: for an actual high-voltage power distribution system in a certain place, taking network loss minimization as an optimization target, considering node voltage margin constraints, adding an optimization model established by a voltage out-of-limit penalty term in a target function, and solving active and reactive power output of a current converter by adopting an alternating iteration method and a particle swarm algorithm; optimized cooperative control among a plurality of flexible interconnection substations and active regulation and control of system power flow are realized, and the operation controllable level of a high-voltage power distribution network is improved. A simulation result shows that the B2B-MMC-based flexible interconnection substation optimal scheduling method can effectively reduce the network loss of a high-voltage power distribution system, improves the average voltage deviation of nodes connected with a converter, and verifies the effectiveness and rationality of the control method provided by the invention.

The invention discloses a WIFI dimming filament lamp driver comprising a dimming driving module, a remote signal receiving module is installed on one side of the dimming driving module, and the powerinput terminal of the dimming driving module and the power input terminal of the remote signal receiving module are both electrically connected with the power output terminal of a power supply circuit. The signal output terminal of the remote signal receiving module is electrically connected with the signal input terminal of the dimming driving module, and the output terminal of the dimming driving module is electrically connected with the input terminal of the lighting lamp. According to the invention, the wireless module is connected with the mobile terminal, the mobile terminal is connectedto the control system of the lighting lamp, when manual active intervention in the adjustment of the lighting lamp is needed, the mobile terminal is connected to the control system of the lighting lamp, the wireless module sends an adjustment signal, and after the adjustment signal is processed by the signal processing module; a priority control module sends the signal to the execution module forpriority execution, so that active regulation and control of the light intensity of the lighting lamp are realized.

The invention discloses a method and device for regulating near-field heat transfer by radiation of micro-nano flat plates through a magnetic field. According to the method, a layer of graphene is laid on each of the opposite faces of the two micro-nano flat plates and used for increasing the control range of the magnetic field on near-field heat transfer by radiation, and the near-field heat transfer by radiation of the micro-nano flat plates is regulated by adjusting thermal magnetic resistance or a gap between the two micro-nano flat plates. The device is provided with two InSb micro-nano flat plates with the same doping concentration and each with a thickness of 0.5 mm, a layer of graphene is laid on each of the opposite surfaces of the two InSb micro-nano flat plates, and the distance between the two layers of graphene is 10-300 nm. Near-field heat radiation is regulated through an external magnetic field, so that high efficiency, temperature independence and non-contact are achieved, non-contact active regulation of near-field heat transfer by radiation between micro-nano structures are achieved, and the method has application value for microelectronic devices or thermophotovoltaic devices and the like.