206results about How to "Meet the needs of different applications" patented technology

The invention discloses functionalized homogeneous particle porous silicon dioxide microspheres and a preparation method and application thereof. The preparation method comprises the following steps of: (1) pre-preparing homogeneous particle porous polymer microspheres with determined components, particle diameters and apertures, and performing surface functionalized treatment on the porous polymer microspheres to obtain the functionalized homogeneous particle porous polymer microspheres; (2) dispersing the functionalized porous polymer microspheres in aqueous solution and adding silicon dioxide precursor to prepare silicon dioxide/polymer intermediate composite microspheres; (3) heating the silicon dioxide/polymer intermediate composite microspheres to remove the polymer to obtain the homogeneous particle porous silicon dioxide microspheres; and (4) performing surface modification on the homogeneous particle porous silicon dioxide microspheres by using a chemical reagent to form a functionalized group, wherein the particle diameter of the functionalized homogeneous particle porous silicon dioxide microspheres is within the range of between 1.7 and 100 microns; and the mesoporous aperture of the functionalized homogeneous particle porous silicon dioxide microspheres is within the range of between 20 and 1,000 angstroms. The functionalized homogeneous particle porous silicon dioxide microspheres can be used as chromatographic filler for efficiently analyzing and separating organic molecules and biological molecules.

The invention relates to a porous material and a preparation method thereof, and discloses a preparation method of a silk fibroin porous three-dimensional material. The preparation method comprises the following steps: sealing a silk fibroin aqueous solution for cultivation, then uniformly mixing with alcohol, freezing to directly obtain a water-insoluble silk fibroin porous bracket material, then regulating the secondary structure and the mechanical properties of the porous bracket by selectively using a post-treatment means, controlling the porosity, the aperture size and the like of the porous material by changing the concentration, the freezing temperature and other parameters of the silk fibroin, and finally removing the alcohol to obtain a pure silk fibroin porous bracket. The preparation process of the invention has the advantages of moderate conditions, no need of adding any crosslinking agent, hole-making agent and other toxic organic solvents, convenient control and easy industrialization, can effectively keep the biocompatibility of the silk fibroin, and can be used for repairing tissues such as bones, cartilages, ligaments, nerves, skins and the like and drug slow-releasing carriers and the like.

The utility model relates to a brushless direct current generator with hybrid excitation double salient, belonging to double salient motor, which comprises a stator and a rotor, wherein, the stator is composed of a stator core (1), a permanent magnet (2), a magnetizing coil (3) and the armature windings (4),(5),(6); the rotor comprises a rotating shaft (6), a rotor core (7); the yoke of the stator is provided with more than two groups of permanent magnets with symmetrical distribution, moreover the number of each group is more than two, and the neighboring permanent magnets are separated by three stator poles; meanwhile the magnetizing coil with symmetrical distribution is arranged outside the permanent magnets. The utility model has no additional air gap; the magnetic potential of the permanent magnet and the magnetic potential of the excitation make parallel connection so as to avoid the permanent magnet being demagnetized by the magnet potential of the electric excitation. A plurality of sets of armature windings output a plurality of channels of direct current after the rectification; wherein the output of the armature winding (4) sleeved on the stators between the permanent magnets can provide the power supply for the own excitation coil (3) of the motor, which makes the entire motor work in an independent electricity generation condition; therefore the utility model is in particular suitable for the wind power generation situation and other separate supply application situation.

The invention discloses a method for transmitting real-time data and non-real time data by an Ad Hoc web radio station, comprising the following steps of: (1) dividing data time slots provided for users into static time slots, competition time slots and preserve time slots, wherein the static time slots are distributed to various users in the web, are only used by corresponding users and adopt astatic TDMA (Time Division Multiple Address) occupied mode, the competition time slots can be used by various users and adopt a time slot ALOHA occupied mode, and the preserve time slots can be used by various users and adopt an end-to-end control packet handing occupied mode; (2) transmitting real-time data in the static time slots; (3) transmitting competition data during competition; and (4) transmitting preserve data during preservation. By using the method, the real-time data are transmitted at the static time slots and the non-real time data are transmitted at the completion time slots and the preserve time slots; and on the basis of maintaining a static TDMA access protocol to the maximum extent, the method provides a more flexible access means for the users.

The invention discloses a package structure and package method of an integrated tunable antenna array and a radio frequency module. The package structure comprises a rigid-flexible board and a radio frequency module package body, wherein the rigid-flexible board is used for arranging an antenna array patch, the radio frequency module package body is used for packaging a radio frequency chip, the rigid-flexible board and the radio frequency module package body are vertically and oppositely arranged and are fastened by four bolts and nuts, the four bolts and nuts are arranged at corners and arematched, and the rigid-flexible board is fixedly connected with one side of the radio frequency module package body by a second flexible substrate. With the package structure of the integrated tunableantenna array and the radio frequency module, fabricated by the invention, the integration of the integrated tunable antenna array and the radio frequency module is achieved, moreover, the tuning ofthe antenna array also can be achieved, the package structure has the characteristics of high integration, good electromagnetic shielding effect, antenna gain, high radiation efficiency, small radiation power and low loss, and the demands of different application occasions can be satisfied.

The invention relates to a flexible conductive composite fabric, and preparation and application thereof. The flexible conductive composite fabric comprises a conductive composite film (1), a base fabric (2) and an adhesive (3), wherein the base fabric (2) is adhered on the upper and lower surfaces of the conductive composite film through the adhesive (3); and two ends of the conductive composite film (1) are respectively adhered with an electrode. The flexible conductive composite fabric is prepared through the following steps: impregnating a carbon nanotube thin film in a graphene suspension, then taking the carbon nanotube thin film out of the graphene suspension, and carrying out drying in the air so as to obtain a carbon nanotube/graphene composite film; allowing a polyaniline nanowire array to grow in situ on the surface of the carbon nanotube/graphene composite film so as to obtain a carbon nanotube/graphene/polyaniline composite film; and respectively adhering an electrode at two ends of the composite film, coating the base fabric on the upper and lower surfaces of the composite film through the adhesive, and carrying out curing so as to obtain the flexible conductive composite fabric. The prepared conductive fabric provided by the invention has good conductivity, can reach 103 S/m to 105 S/m, can bear a certain degree of bending and compressive deformation, and is extensively applied in the fields of intelligent textile structures and intelligent materials.

The present invention relates to a magnetically integrated zero voltage zero current soft-switching full-bridge circuit. The circuit is characterized in that the circuit comprises an inverter, a magnetically integrated network, a rectifier, and an output filter capacitor (Co).The magnetically integrated network integrates a transformer function, an energy storage inductor function and an auxiliary inductor function for realizing soft-switching in a magnetic element. The magnetically integrated network also has various topology variation types to meet the requirements of different application occasions. The whole converter has only one magnetic element so that the number of the magnetic elements is largely reduced and the power density is improved. Furthermore, the zero voltage cutover of all primary switch tubes is realized by using exciting current without an additional auxiliary soft-switching network. A commutation diode at the secondary side can realize the zero current switching. The switching loss is largely reduced, and the switching frequency is improved. The circuit can adopt the phase-shifting control, and also can adopt the unsymmetrical PUM control, thereby having good theoretical research value and use value.

The invention discloses a low switching frequency model prediction power control algorithm of a single-phase pulse rectifier. Under the low switching frequency, power prediction values of active power and reactive power are calculated through a model prediction power algorithm; then the component of the minimal optimal control quantity of an evaluation function is calculated under a rotating coordinating system; regulating waves subjected to volt-second compensation is acquired through the volt-second balancing compensation algorithm; and finally an on-off control signal is generated by combining a pulse width modulating strategy, and the control of the single-phase pulse rectifier is finished. According to the invention, the control precision of the low switching frequency model prediction power control algorithm of the single-phase pulse rectifier is improved with no need to repeatedly calculate the evaluation function, so the complexity of the algorithm is reduced; control and sampling efficiency is improved; the algorithm has good dynamic and stable-state performance, and high in flexibility; and different modulating strategies and control can be adopted to cooperate with the control algorithm so that requirements in different application occasions are met.

The invention provides an information security processing method and security processing apparatus applied to electronic equipment; a security application can be implemented on the electronic equipment; the information safe processing method comprises the steps of enabling the security application to be associated with a first sub application and a second sub application; adopting a first security mechanism for the first sub application while adopting a second security mechanism for the second sub application; after the electronic equipment receives an application running instruction, determining whether the second sub application is indicated by the application running instruction to be implemented or not; if the second sub application is indicated by the application running instruction to be implemented, adopting the second security mechanism to enable the second sub application to be implemented, wherein the first sub application is different from the second sub application; and the security level of the second security mechanism is higher than that of the first security mechanism. By adoption of the mobile terminal security payment scheme provided by the invention, the security of applications having high demand on security is ensured, and the convenience in use of applications having low demand on security is improved as well.

The invention relates to a strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material and a preparation method thereof. The preparation method comprises the following steps: firstly batching according to a chemical formula (1-x)SrTiO3-x(0.65BaTiO3-0.35Bi0.5Na0.5TiO3), wherein x represents a molar fraction and is greater than or equal to 0.1 but less than or equal to 0.6; ball-milling and drying to obtain a raw material powder body; adding the obtained raw material powder body into a bonding agent for pelleting, decaying for 24-48 hours, pressing into a sheet, performing glue removal treatment and sintering at a temperature of 1250-1350 DEG C to obtain the strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material. The ceramic material provided by the invention is simple and stable in preparation process, suitable for industrial production and excellent in energy storage characteristics, the energy storage density calculated based on a ferroelectric hysteresis loop is 0.961-1.403 J/cm<3>, and the energy storage efficiency is 84.77-91.63 percent.

The invention provides a storage controller and a method for controlling data reading. The storage controller includes an encoding circuit and a control circuit. The encoding circuit is programmable to support a plurality of different finite fields, and implemented for generating encoded data in one of the plurality of different finite fields according to an adjustable finite field setting. The control circuit is implemented for controlling the adjustable finite field setting of the encoding circuit and recording the encoded data into the storage device according to the encoded data, wherein the encoding circuit includes a plurality of encoders corresponding to the different finite fields, and starts one of the plurality of encoders according to an enabled signal; and the control circuit generates the enabled signal to set the adjustable finite field setting. The storage controller and the method for controlling data reading provided by the invention could meet requirement of different application through dynamically adjusting the error correction ability.

The invention provides a nanocrystalline magnetically soft alloy, an amorphous magnetically soft alloy and preparation methods of the nanocrystalline magnetically soft alloy and the amorphous magnetically soft alloy. The nanocrystalline magnetically soft alloy comprises the compositions of Fe, Cu, Si, B, and Nb, and further comprises at least one element between Mn and Cr, wherein the atomic percentage content of each element at the at least one between the Mn and the Cr is not more than 3.5 at%. The antiferromagnetism of the Mn element and/or the Cr element is utilized, and a heat treatment mode of multi-stage rate annealing is combined, so that the high-frequency magnetic permeability of the magnetically soft alloy is improved, the high-frequency loss of the magnetically soft alloy is reduced, and the high-frequency magnetic performance of the magnetically soft alloy is improved; meanwhile, the crystallization temperature interval is narrower, and the heat treatment temperature interval is wider, so that the high-quality nanocrystalline magnetically soft alloy or the high-quality amorphous magnetically soft alloy are obtained favorably and the preparation cost is reduced; and inaddition, the oxidation resistance of the Mn element and/or the Cr element is further utilized, so that the tolerance of impurities is improved, the surface of an amorphous strip is prevented from being crystallized, the amorphous forming capacity is improved, and the high-quality magnetically soft alloy can be prepared through low-purity commercial raw materials.

The invention discloses a high-voltage high-energy density unleaded ceramic dielectric material. The components of the material are expressed through the general formula (0.95-x-y-z)Bi0.5Na0.5TiO3-xBi0.5K0.5TiO3-yBa0.65Sr0.35TiO3-zK0.5Na0.5NbO3-0.05LiTaO3, wherein x, y, z represent mole fractions; x is larger than or equal to 0.002 and smaller than or equal to 0.3; y is larger than or equal to 0.002 and smaller than or equal to 0.2; z is larger than or equal to 0.001 and smaller than or equal to 0.3. The material is sintered by adopting electric discharge plasma; uniform dense ceramic texture can be obtained at a low sintering temperature; the ceramic has excellent energy storage density, energy storage efficiency and high voltage electricity constant; the energy storage density can reach 1.75 J/cm<3>; the energy storage efficiency can reach 65%; the piezoelectric constant d33 can reach 682 pm/V; the practicability is good.

The invention discloses an air micro-cavity type fiber hydrophone, a manufacturing method of the same, and a signal detection method. The air micro-cavity type fiber hydrophone is formed by a fiber and an air micro-cavity at the end surface of the fiber, wherein the air micro-cavity can be used as a compressible Fabry-Perot cavity for sensing the micro-cavity length or reflected light interferencespectrum change caused by the external pressure so as to realize measurement of sound wave and ultrasonic wave. The manufacturing method of the air micro-cavity type fiber hydrophone is simple, and optically heats the fiber end surface coated with luminous absorption material to realize water vaporization on the fiber end surface and form an air micro-cavity on the fiber end surface, thus avoiding the complicated process, such as fiber Fabry-Perot cavity structure manufacturing and pressure sensitive film welding. Besides, the manufacturing method of the air micro-cavity type fiber hydrophonerealizes accurate on-line control of the cavity length by adjusting the heating laser power, can overcome the problem that a traditional manufacturing method is not enough in the repeatability of device structural parameters, can realize dynamic tuning of the measurement range and the working frequency band on single sensor, and can improve applicability of the sensor.

The invention discloses a three-component acid bright copper plating additive and application thereof in an electroplating process and an electrolytic copper foil manufacturing process. The additive is prepared form the following raw materials: 20-100mg/L of chloridion, 5-50mg/L of organic propane sulfonate and 10-80mg/L of alkylphenol polyoxyethylene ether, and is applied to a CuSO4-H2SO4 electrolyte system, wherein Cu<2+> is 70-120g/L; H2SO4 is 80-150g/L; the temperature of a plating solution is kept at 40-70 DEG C; the plating solution is in a stirring state; 600-900mA/cm<2> of current density is exerted to the cathode; the cathode rotating speed is controlled to obtain the bright smooth copper foil with a target thickness. The additive can be applied to high-temperature and high-concentration electrolyte; the production efficiency of the electrolytic copper foil is significantly improved; in addition, the three-component acid bright copper plating additive is simple in component, and convenient to regulate and control; preparation of the copper foils with the brightness from matte to mirror brightness under the condition of smooth surfaces can be ensured; the requirements of different applications are met.

The invention discloses a multi-band reconfigurable signal generating method based on a multi-frequency optical local oscillator. Two paths of optical local oscillator signals are generated, wherein at least one of the paths is a multi-frequency optical local oscillator signal; one optical local oscillator signal therein is used as an optical carrier to electro-optically modulate a low-frequency reference signal to the optical carrier, so as to generate a carrier-suppressed single sideband signal; the carrier-suppressed single sideband signal is coupled and frequency mixed with the other optical local oscillator signal, and each of the frequency components is divided as an independent channel; each channel signal is subjected to photoelectric conversion and delay processing respectively, thereby generating multiple radio frequency sub-band signals in different bands and at different times; and splicing and combining the radio frequency sub-band signals to obtain a reconfigurable signalwith randomly adjusted bandwidth, time width and center frequency. The invention also discloses a multi-band reconfigurable signal generating device based on the multi-frequency optical local oscillator. The signal bandwidth, the time width, and the center frequency of the present invention are flexible and variable; and the bandwidth and time width of the signal can be further extended.

The invention provides a fully automatic micro-droplet emulsion generating device and generating method, wherein the device includes a base and a support plate; a slide rail is arranged on the base, amicro-droplet generating chip is arranged on the slide rail through a chip fixture frame, one side of the chip fixture is connected with a driving motor, and the driving motor moves to drive the chipfixture to move on the slide rail; one side of the support plate is provided with a guide rail, and an air pressure control module is arranged on the guide rail; an air cylinder is arranged above theguide rail, and an air cylinder shaft of the air cylinder is connected with a connection plate; the air cylinder moves, and the air pressure control module is driven to move on the guide rail. The reaction conditions of droplet formation can be adjusted by automatic configuration, so that micro-droplets with different sizes are produced, and the needs of different application occasions are met; sample pollution is isolated by a sealing cover, and a microdroplet generation chip is protected from being damaged by a press plate during operation. The eight-channel isolation system realizes preparation of droplets in two or multiple channels, is more convenient than conventional equipment and saves the use amount of reagents.

The invention belongs to the technical field of coatings, and discloses a water-based epoxy curing agent based on castor oil triglycidyl ether and a preparation method of the curing agent. The preparation method comprises the following steps: performing a reaction on bisphenol epoxy resin, polyetherol diglycidyl ether and a polyamine to prepare an epoxy-polyamine addition product with -NH2 groupsat two ends, adding the castor oil triglycidyl ether, performing a branching reaction to obtain a prepolymer with -NH2 groups at three branched chain tail ends, adding a monoepoxy compound to block terminal primary amine hydrogen, and finally adding water for dispersion to obtain the water-based epoxy curing agent. The water-based epoxy curing agent obtained by the method has the advantages of a long pot life, low viscosity and easy construction when used with water-based epoxy resin, and the cured product has a large cross-linking degree, has good flexibility while having good corrosion resistance, and overcomes the defects of low toughness and high brittleness of an ordinary epoxy coating layer.

The invention provides a lead-free ceramic material with high energy storage density and a preparation method, belonging to the technical field of energy storage ceramics. The method of the present invention first carries out batching according to Ba0.56Sr0.44Ti0.93Sn0.07O3 and Bi0.18Na0.46NbO3 respectively, after mixing uniformly by ball milling process, at first carry out pre-calcination, then grind and sieve, then according to chemical formula (1-x) Ba0 .56Sr0.44Ti0.93Sn0.07O3·xBi0.18Na0.46NbO3 ingredients and ball milling, granulation after ball milling, and then compression molding in the mold, and then after debinding treatment, the discharge plasma sintering system is used for primary sintering, and then ordinary high temperature The ceramic material with high energy storage density and high energy storage efficiency is obtained after secondary sintering in the furnace. The preparation method of the invention is simple, and the obtained lead-free ceramic material has higher energy storage density and energy storage efficiency.

The present invention discloses a hybrid tone mapping method for machine vision. The method comprises the following specific steps: performing tone mapping on an input HDR image according to a tone mapping empirical model to obtain a mapped image LDR1; calculating a visual saliency map SHDR of the HDR image by using a visual saliency map calculation model; performing logarithmic transformation on the HDR image and the visual saliency map SHDR to obtain a visual saliency map SHDR1; quantizing the visual saliency map SHDR1 to obtain a visual saliency map SHDR2; transforming the visual saliency map SHDR2 from a logarithmic domain back to a brightness domain to obtain an improved visual saliency map S'HDR; and finally, performing multiplicative synthesis on the improved visual saliency map S'HDR and the tone-mapped image LDR1 to obtain a final rendering result image LDR. According to the hybrid tone mapping method for machine vision provided by the present invention, a user performs parameter adjustment to switch between an empirical tone mapping method and a perceptual tone mapping method, and a visual attention mechanism of human eyes on natural scenes is simulated, so as to meet requirements of different application scenarios.

The invention relates to a method for enhancing heat conduction performance of foamy carbon with high aperture ratio, aims at solving the defects that the foamy carbon with high aperture ratio is low in heat conduction and poor in dynamic performance. In the method, the hole wall of the foamy carbon is enhanced by medium-phase pitch through vacuuming/pressurization dipping-gradient pressure foaming method for a plurality of times, the enhanced foamy carbon is further subject to high-temperature graphitizing processing, thus forming enhanced type high-conduction foamy carbon. For the enhanced foamy carbon, heat conductivity of the volume is improved greatly, and the dynamic performance is improved obviously.

The invention discloses an intelligent wireless network sensor system possessing power supply management and belongs to the instrument and meter detection technology field. Wireless sensor nodes in the system comprise ground floor nodes, a routing node and a coordination node. The ground floor nodes are distributed on each monitoring point. According to a Zigbee protocol, the routing node and the coordination node are communicated with an upper computer so as to realize real-time control of a network. Each sensor node is formed by a base circuit, a core module, a function circuit and a power supply management module respectively. In the invention, based on a PIC single chip microcomputer, through using a mode of controlling on and off of a load power supply, about 70% average node power consumption is reduced; a dormancy mechanism is added in the nodes and on and off of a node load power supply are controlled in a fixed time mode; micromation, low power consumption, low cost and other characteristics are possessed; the nodes possess certain anti-interference performance and high robustness of adaptability; an expansion interface is reserved in the nodes and scalability is high.

The invention discloses a method for loading silver particles on the surface of silicon nanowires. The method comprises the following steps: dispersing the silicon nanowires without a surface oxide layer in a cetyl-trimethyl ammonium bromide (CTAB) aqueous solution to obtain a dispersion solution of the silicon nanowires; adding a silver nitrate solution to the dispersion solution of the silicon nanowires while stirring, and reacting at room temperature; and centrifuging the obtained reaction solution after reaction, and colleting precipitate to obtain the silicon nanowires loaded with silver particles on the surface. The method is simple and rapid, and the adopted equipment is cheap. By utilizing the method, the silicon nanowires can be prepared in quantity, and topographical dispersion density of the silver particles deposited on the surface of the silicon nanowires can be regulated and controlled by changing the concentrations of the dispersion solution and the silver nitrate solution, thus meeting different needs.