658results about How to "Short duration of action" patented technology

The invention provides an electromagnet and friction composite disc type brake and a brake method. Both a steering knuckle and a brake caliper bracket are fixedly connected with an electromagnet brake fixing device, and the electromagnet brake fixing device is fixedly connected with magnet cores. The magnet cores are symmetrically arranged on the two sides of a brake disc, and coil windings are wound on the magnet cores. Permanent magnet bodies and the magnet cores are oppositely arranged, and air gaps are arranged between the permanent magnet bodies and the magnet cores. When an automobile brakes, electromagnet fields distributed on the axes of the coil windings are generated after the coil windings are electrified, and the directions of the electromagnet fields generated by the coil windings on the two sides of the brake disc are consistent. The permanent magnet bodies rotate 90 DEG, the directions of the permanent magnet fields of the permanent magnet bodies are consistent with the directions of the electromagnet fields of the coil windings, and the brake disc is braked by the superposition of the electromagnet fields and the permanent magnet fields. The size of the brake force is adjusted by adjusting the different rotating angles of the permanent magnet bodies or the size of electrifying current in the coil windings. The action time of the brake is shortened, the brake efficiency is enhanced, the use strength of the friction brake is reduced, the abrasion of brake pads is alleviated, and the brake force is easy to control.

The invention provides a preparation device for preparing functional micro-nano materials on silicon surfaces based on femtosecond laser and a method. When the device is used for preparation, scanning speed reaches 4mm/s, and is increased by 20 times as compared with scanning speed when micro-nano materials are prepared in a traditional method. Simultaneously, supersaturation doping of the silicon material surface and preparation of micro-nano structures of the surfaces are realized during preparation, prepared micro-nano materials can absorb 90% of light with wavelength ranging from 200nm to 2500nm, and silicon materials without scanning traces on surfaces can be obtained. The preparation device and the method are exquisite in design and easy to control, and the prepared materials can be applied to solar cells, detectors, field emission devices and the like in the photoelectric industry.

The invention provides a system for achieving dynamic wireless constant power charging and a control method for the system. The system comprises an energy transmitting module, an energy receiving module and a constant power tracking control module, wherein the energy transmitting module is used for converting a primary direct current power supply into high-frequency alternating current electrical energy and transmitting the high-frequency alternating current electrical energy in a high-frequency magnetic field coupling manner; the energy receiving module is used for receiving electrical energy and supplying the electrical energy to a load; the constant power tracking control module is used for obtaining a reference control signal according to charging current collected in real time, and adjusting voltage of a rectifying port into a reference control signal to achieve a constant power tracking control. With direct current output by a DC/DC converter at a secondary side as feedback quantity, direct current voltage of an uncontrollable rectifier terminal is disturbed by a perturbation and observation method-based constant power tracking control method; and a transmission voltage gain from the primary side to the secondary side always works on a voltage gain point corresponding to a transmission power extreme point, so that the condition that the system transmits the electrical energy at constant power is ensured, and the output power is kept stable.

The present invention discloses a liquid high-effective disinfectant. It is formed from (wt%) 1-2% of hyamine which is the mixture of alkyl dimethyl benzyl ammonium chloride and dialkyl dimethyl ammonium chloride, 0.1-0.5% of biguanide which is one of chlorhexidine and polyhexamethylene biguanide salt or their mixture, 3-8% of aldehyde which is one of glutaraldehyde, citrial, jasminal and myristic aldehyde or mixture of more than two kinds of them, 5-10% of surfactant, 1-5% of urea, 40-50% of hydrophilic solvent, 0.1% of EDTA sodium salt, 2.5-35% of water and 0-3% of selectable components, such as aromatic compound, colouring matter and viscosity-regulating agent.

A cut deal laser inherent stress composite peen forming features in the clipper using robot, using carbon dioxide to realize the basic formation, profile measuring feedback system controlling the deformation quantity, left stress meter measuring the surface stress of the board, optical scanning the pre formation, realizing board through model analog software, getting optimized process parameter instructing laser consecutive peen formation, using neodymium glass laser providing short pulse strong laser light, laser impact wave as the force source of precise forming, using the profile feedback device and on line measuring board surface stress left stress to control the deformation quantity to realize precision forming with complex shapes.

The invention belongs to the field of laser processing, and relates to a near-net forming method and device for composite manufacturing a fine workpiece based on laser additive manufacturing and subtractive manufacturing. According to the method, the construction parameters of a three-dimensional digital-to-layer slicing layer are generated by utilizing software, laser additive manufacturing processing is carried out, and ultrafast pulse laser subtractive manufacturing processing is carried out alternately in the laser additive manufacturing processing process to form a three-dimensional entity. The device comprises a computer control device, a sealing molding chamber, a light path selecting system and an inert protection gas source; during additive manufacturing processing, the computer control device controls the light path selecting system to select the laser emitted by an additive manufacturing laser device and perform laser additive manufacturing processing; and during subtractivemanufacturing processing, the computer control device controls the light path selecting system to select ultrafast pulse lasers emitted by a subtractive manufacturing laser device and perform the ultrafast pulse laser subtractive manufacturing processing. According to the near-net forming method and device, the preparation of complex and fine-structure parts can be completed in a high-precision and integrated manner, the defects that traditional laser additive manufacturing is low in the forming precision, high in roughness and cannot be used for preparing a fine and complex inner cavity areovercome.

The invention discloses a fermentation rice milk drink and a preparation method thereof, which adopts fermentation rice as raw material that is processed through immersion, water bathing, cooking, fermentation, beating and pulp refining, and then the pH value of the obtained emulsion is adjusted; thermostable alpha-amylase Unikamyl HT is added according to a portion of 10 kilograms of the material being added with 3 to 5ml of thermostable alpha-amylase Unikamyl HT; then the obtained starch milk is sent into the ejector device through a flow meter; through flash cooking, the temperature of the obtained material should rise to 95 to 98 DEG C; then thermal insulation, enzyme stabilization, cooling and pH value regulation are done; efficient glucoamylase Unikase GA is added according to the portion of 10 kilograms of the material being added with 5 to 15ml of efficient glucoamylase Unikase GA; the temperature of the obtained material should rise to 100 DEG C, and the killing of enzyme is done; next, the obtained material are added with water, citric acid, xanthan and sodium carboxymethyl cellulose; the temperature raises by 55 to 60 DEG C so as to do secondary homogeneous; finally, the super-high-temperature sterilization and aseptic packing are done. The fermentation rice has specific flavor of rice wine, and is characterized by sweet and fragrant taste, light yellow or ivory color, being rich in nutrition and with the functions of health care and skin-maintaining and stable storage.

The invention discloses a fault-tolerant dual-vector prediction control method and apparatus for a six-phase permanent magnet motor. The fault-tolerant dual-vector prediction control method comprisesthe steps of obtaining the rotor position, rotary speed and phase current of the six-phase motor; solving fault phase counter electromotive force according to the rotor position, the rotary speed, thepermanent magnet flux linkage on the rotor and the axial line position of the fault phase, and establishing a motor frequency converter model by considering the fault phase counter electromotive force; establishing a reduced-order motor mathematical model according to the position of the fault phase; establishing a six-phase motor switch meter after fault, obtaining phase voltages corresponding to respective switch vectors, bringing in the reduced-order motor mathematical model, and determining a phase current prediction value of each switch vector after one sampling period is executed; performing evaluation on error between each phase current prediction value of each switch vector and the corresponding phase current instruction value, and selecting the switch vector with the minimum error as the optimal switch vector; and performing modulation on the optimal switch vector and a zero vector in one sampling period to determine the duty ratio of the optimal switch vector. By virtue of the fault-tolerant dual-vector prediction control method, the current harmonic of the faulty motor can be suppressed effectively.

The present invention provides a method for identifying and using partial adenosine A_2A receptor agonists that are useful as adjuncts in myocardiological perfusion imaging.

The invention relates to a preparation method of a porcine vascular cell-free stent with the combination of chemistry and physics, which mainly includes the steps of material preparation, membrane rupture of superficial cells, removal of superficial cells, removal of deep cells and so on. Surfactant is used for the membrane rupture of deep cells at the same time of completing the removal task of superficial cells, so the incubation and oscillation only need to be carried out for about 1 hour in the surfactant solution with appropriate concentration, and the removal task of the deep cells can be completed by the ultrasonic waves with lower power in a shorter time; the mutual cooperation can allow the porcine vascular cell-free stent to have the advantages of lower equipment cost, shorter preparation time, thorough removal of the cells, easy clean of the surfactant, complete preservation of extracellular matrix (stent), good biocompatibility, appropriate degree of biodegradation rate, high mechanical strength, easy suture and fixation and so on; furthermore, the stent is also conductive to the colonization and growth of human cells and can be gradually degraded and absorbed along with the regeneration of real blood vessel.

The invention provides a preparation method and a using method for polyamino/amidoxim-modified multifunctional ion exchange fibers. Polyacrylonitrile fibers used as a base material are sequentially grafted with a polyamino group and an amidoxim group through a hydrothermal process to prepare the polyamino/amidoxim-modified multifunctional ion exchange fibers. The chelation property of effective functional groups and metal ions is used to treat conventional metal element, nonmetal element or radioactive element wastewater. The preparation method and the using method are simple, the graft ratioof functional groups is high, and the prepared multifunctional ion exchange fibers have the advantages of stable performances, good hydrophilicity, high radiation resistance and high adsorption capacity. The problems of swelling-shrinkage and cracking of resin, silica gel and other traditional materials in different pH environments are avoided.

The invention relates to the technical field of intelligent sensing and particularly discloses a Brillouin scattering signal processing method and a distributed fiber sensing system thereof. The system comprises a sensing fiber, a laser signal source, an annular device, a detection pulse optical path modulation module, a frequency shift reference optical path modulation module, a coherent detection unit and a data acquisition processing module, so relative variation quantity of Brillouin frequency shifts can be precisely acquired, backward Brillouin scattering spectrums are acquired and the complete Brillouin scattering spectrum is obtained. The method comprises steps of firstly, establishing a detected Brillouin scattering signal spectrum model; and using a fast iteration algorithm based on numerical optimization to carry out characteristic extraction on the Brillouin scattering spectrum. In the method, scattering signal frequency spectrums obtained through frequency scanning of each time are fit, so sensing information of temperature or stress distributed along the fiber is precisely acquired. A solving method has strong global searching ability, so algorithm action time is shortened and measurement precision and timeliness of the system are effectively improved.

The invention relates to a method for separating lignin and cellulose from the wastes generated during the processes of extracting flavone, glycyrrhizic acid or polyoses from the traditional Chinese herb of liquorice. The method includes the following steps: (1) the waste residue of liquorice is added into the mixed solvent of methyl isopropyl ketone-ethanol-water and is manufactured into a turbid liquid; (2) the turbid liquid is treated by ultrasonic and then is stood for a certain period of time and filtered to obtain the filtrate and filter residues; (3) after the filtrate is condensed in vacuum and the solvent is recycled, a crystal is obtained; then the obtained filtrate is filtered and dried to obtain the lignin; the filter residues are directly dried to obtain the cellulose. The method for separating lignin and cellulose from the waste residue of the liquorice by utilizing the ultrasonic technology can overcome the defects of environment pollution and resource wasting caused by a soda boiling method and sulphite as well as the defect of high energy consumption caused by a high-boiling alcohol solvent method. The method creates a new approach for the comprehensive utilization of the waste residues of the liquorice.

The invention discloses a composition for regulating soil acidity and application thereof and belongs to the technical field of soil improvement and regulation. The composition is prepared from straw biomass charcoal, alkali residues and an organic fertilizer, wherein the ratio of the straw biomass charcoal to the alkali residues to the organic fertilizer is (80-100) to (6-15) to 50. The three materials can remarkably improve the soil acidity and soil fertility and thus increase crop yield through matched application, meanwhile the soil acidification resisting capability is improved, the improvement effect time is prolonged, and the re-acidification process is retarded. A regulating method is a cheap and long-acting comprehensive soil acidity regulating method. A comprehensive red soil acidity regulating method mainly uses industrial and agricultural wastes as raw materials to prepare a regulating agent and opens a new way for resourceful waste utilization.

The invention discloses a static blasting and energy-gathering device. The static blasting and energy-gathering device comprises a main body protective barrel which is formed by splicing two circular-arc-shaped steel templates which are not connected, wherein a connecting line of middle points of the two circular-arc-shaped steel templates is perpendicular to a pre-splitting line; a splitting angle is arranged on the outer part of each circular-arc-shaped steel template, and the tip end of the splitting angle and the pre-splitting line are positioned on the same straight line. A method for blasting by applying the static blasting and energy-gathering device comprises the following steps: 1) drilling; 2) placing a static stone-breaking and energy-gathering device; 3) pouring stone breaker slurry for breaking stones; 4) recycling. According to the static blasting and energy-gathering device and the blasting method provided by the invention, the problems of long crushing time, high dosage for crushing and the like can be solved, the static crushing and blasting time is shortened, the dosage per crushing volume is reduced, and the crushing efficiency of a static crushing agent is improved.

The invention relates to an environment-friendly mould-proof and anti-discoloration protective agent for rubber wood. Iodopropynyl butylcarbamate ester, an isothiazolinone compound, an organic solvent, a solubility promoter A, a solubility promoter B and water are uniformly mixed to prepare the environment-friendly mould-proof and anti-discoloration protective agent; the solubility promoter A is one of an advanced fatty acid salt surfactant, a quaternary ammonium salt surfactant and a polyhydric alcohol surfactant or a combination of the advanced fatty acid salt surfactant, the quaternary ammonium salt surfactant and the polyhydric alcohol surfactant; and the solubility promoter B is one of a sulphosalts surfactant and an isothiazolinone surfactant or a combination of the sulphosalts surfactant and the isothiazolinone surfactant. The iodopropynyl butylcarbamate ester and the isothiazolinone compound are compounded, stable treatment solution can be formed, and the environment-friendly mould-proof and anti-discoloration protective agent has the advantages of environmental protection, broad spectrum and high efficiency, is good in water solubility and stability, realizes excellent effects for preventing and treating botryodiplodia theobromae, alternaria alternata and the like which severely damage the rubber wood, is applicable to various rubber wood treatment processes such as vacuum-pressure processes, hot and cold bath processes and soaking processes, and can be directly applied to existing production processes conveniently.

The invention relates to the technical field of printed circuit board solderability preservation, in particular to an organic solderability preservative preimpregnation finishing agent and an organic solderability preservative forming method. The adopted organic solderability preservative preimpregnation finishing agent comprises the following components in percentage by weight: 0.05 to 6.0 percent of nanometer accelerating agent, 0.01 to 2.0 percent of quinoxaline compound, 0.05 to 2.0 percent of inorganic base, 0.001 to 15.0 percent of ammonia or amine buffering agent, 0.001 to 0.5 percent of metallic salts, and 0.01 to 5.0 percent of halide. The invention firstly forms a nano material active layer on the copper face, and can increase the thickness of the organic solderability preservative by more than 20 percent in the same reaction time, reduce metal pollution speed of tank liquor, double the service life of the tank liquor, prevent galvanic effect, ensure good appearance of a printed circuit board, reduce the thickness of intermetallic compounds (IMC) after soldering, and guarantee the shear strength of welding joints and reliability of welding spots.

The invention provides a primary cell culture medium for culturing primary esophageal squamous carcinoma epithelial cells and containing a combination of an MST1/2 kinase inhibitor and a ROCK kinase inhibitor, and a culture method using the primary cell culture medium. According to the culture method, the primary cells are cultured on a culture vessel coated with extracellular matrigel by using the primary cell culture medium, so that the primary cells are rapidly proliferated. The cell model obtained by the primary cell culture medium and the primary cell culture method can be used for evaluating and screening curative effects of medicines.

The invention discloses an organic rare earth bacteria inhibitor, mainly, a binary or ternary compound of lanthanon and 8-Hydroxyquinoline with other organic ligand. The invention also discloses the application of the organic rare earth bacteria inhibitor in preventing the plant bacteria and pests. The plant bacteria and pests include the rice bacteria and pests, the cotton bacteria and pests, the corn bacteria and pests, the vegetable bacteria and pests, and the like. The invention widens the application range of the rare earth to the pesticide filed; secondly, the invention comprehensively takes the advantage of the bacteriostatic function of the organic ligands and the rare earth, can perform double bacteriostatic effect with high bacteriostatic effect; in addition, the dosage of the organic rare earth bacteria inhibitor is less, the toxicity is low, the effective duration is long, the medicine resistance cannot be produced, and the production cost is low.