33results about How to "Proportional control" patented technology

Skateboard speed control is achieved by improved application of a mechanism to provide even force to the wheels by a simplified speed control system. The speed control system is durable, compact, simple, uses minimal components, is ergonomic, and has speed control pads that move in sync while simultaneously tolerating variations in wheel orientation and position while a rider is maneuvering the skateboard.

The invention discloses an S-shaped aerosol extinguishing agent and a preparation method thereof. The S-shaped aerosol extinguishing agent comprises the following components by weight: 45 to 65 parts of oxidant, 30 to 55 parts of reductant, 6 to 15 parts of property modifier, and 5 to 10 parts of adhesive, wherein the reductant comprises components such as potassium oxalate, aluminium powder, magnesium powder urea and the like. Through the adjustment of the components and the match, the reductant component and the proportion of the reductant in the extinguishing agent are changed; the reductant can have strong oxidation-reduction reaction with the oxidant by being added with potassium oxalate; meanwhile dissociated K and Sr can have frequent chain reactions with an active group H, OH and O during the burning in a moment; and the exothermic reaction among the active group H, OH and O can be consumed and inhibited, thereby playing a restraining effect on the burning reaction. Thorough the addition of potassium oxalate, magnesium, aluminium, functional additive magnesium carbonate and the like, the burning and ignition property can be improved; and the reaction temperature of the extinguishing agent can be reduced.

The invention relates to a method for analyzing short-term temperature fluctuations, which collects daily temperature series of a certain place for many years, takes data within the length of the research period to calculate the difference between the daily temperature and the temperature of the first day within the length of time, and forms a difference group , and form multiple difference series based on the corresponding difference group data for many years, sort each difference series by size, and calculate the upper and lower thresholds; determine the relationship between the daily corresponding difference group and the upper and lower thresholds of the corresponding difference series, It can be judged whether the temperature fluctuation occurs within the length of the study period. The method of the present invention can freely define the length of the research period and the threshold ratio of the occurrence of fluctuations, and eliminates the influence of seasonal changes on temperature fluctuations, and can obtain the daily temperature fluctuation range and the fluctuation frequency within a time period, and the direction of fluctuations can be determined by the fluctuation range Positive or negative indication of the indicator.

The invention discloses a method for promoting iP-1-B to form I' crystals directly from melt through monomer copolymerization. Propylene and 1-butylene copolymer is subjected to heating heat preservation and cooling, meanwhile, the melt crystallization behavior of the copolymer is observed in situ through wide-angle X-ray scattering, it is found that only II crystals formed by the copolymer and homopolymerized iP-1-B are different, a small number of I' crystals can be generated while the II crystals are mainly formed, then in the multi-time cyclic heating and cooling process that the temperature is raised to 125 DEG C and then reduced to 30 DEG C, more crystal forms I' can be generated by the propylene monomer copolymerized iP-1-B obviously compared with the homopolymerized iP-1-B, along with increase of 30-125 DEG C cyclic heating and cooling frequency, the proportion of the generated I' crystals is increased, and the method is simple in process and easy to operate.

The invention discloses a surface fluorine-doped polymer fiber and a preparation method thereof. A ratio of fluorine element to total element in the surface fluorine-doped polymer fiber can be controlled at 5%-50%. According to the invention, a plasma discharge technology is utilized to perform surface fluorine-doping modification on a fluorine-free polymer fiber, thereby breaking through a limitation that the conventional surface fluorine-doped polymer nanofiber needs to be prepared from a halogen-containing polymer precursor; controllable preparation of the surface fluorine-doped polymer nanofiber is realized by adjusting a receiving device and designing subsequent plasma modification in an electrospinning process and utilizing interaction of a discharge plasma, the polymer fiber and aninsulating polymer film without using a fluorine-containing chemical reagent, thereby significantly improving an industrial value of the polymer nanofiber and effectively expanding application of thepolymer fiber in new fields.

Boiled of liquefied natural gas flows from, say, storage tank 10 and is compressed in vapour compression stages 40 and 42. The resulting compressed vapour is condensed in a condenser 46 and the condensate returned to the tank 10. The condenser 46 is cooled by means of a working fluid, for example nitrogen, flowing in a Brayton cycle 60. The Brayton cycle includes a heat exchanger 86 which removesheat of compression from the compressed natural gas vapour upstream of its passage through the condenser 46. In addition a part of the working fluid is withdrawn from a region of the Brayton cycle 60intermediate the working fluid outlet from the condenser 46 and the working fluid inlet to the heat exchanger 86 and the withdrawn working fluid flows through another heat exchanger 88 in which it removes heat of compression from the natural gas vapour intermediate the compression stage 40 and the compression stage 42. The withdrawn working fluid is returned to the Brayton cycle 60.

The present invention relates to a PET electroplating decorative film production process and its production equipment, which comprises the following production steps: first, coating the corresponding film layer on the PET film; second, printing the corresponding thirdly, laser cutting the PET film that has been printed with protective ink; fourthly, inspecting the finished PET film after cutting; fifthly, cutting the finished PET film after the inspection, and the inspection process Use the detection device. When producing the PET electroplated decorative film, the present invention first electroplates the PET film, electroplates the metal material on the surface of the PET film, and then prints the ink layer on the surface of the electroplated film, which can protect the electroplated film, and then Laser cutting the electroplating film, laser cutting can accurately cut out the shape of the corresponding electroplating product, so as to reduce the proportion of defective products produced, after the cutting is completed, the electroplating pattern is inspected, which greatly improves the good quality of the PET electroplating decorative film. Rate.

The invention provides a single metal / multi-wall carbon nano tube type composite material, a preparation method and application thereof. According to the composite material, the single metal is uniformly loaded on the carbon nano tube, wherein the mass percentage of the carbon nano tube is 63 to 95 percent, the particle diameter of the single metal is 15 to 28 nanometers, and the diameter of the carbon nano tube is 10 to 30 nanometers. The preparation method comprises the following steps of: preparing a laminated plate containing LDH of Co, Cu and Mg activity or activity-aid species by using the micro adjustable characteristics of the composition and the structure of the LDH laminated plate, growing a carbon composite material by roasting and a chemical vapor deposition method, and meanwhile reducing mixed metal oxide into the single metal so as to obtain the single metal / multi-wall carbon nano tube type composite material. A noble platinum metal is loaded on the composite material toprepare an anode catalyst of a direct methanol fuel cell, the peak current density of the catalyst on methanol electro-catalysis oxidation is 21 to 36mA.cm<2>, and the specific activity can reach 235to 451 mA / mg. The preparation method has the advantages of simple preparation flow, low cost, environment friendliness and the like, and is suitable for industrialized application.

The invention discloses an intelligent batching device for animal husbandry, which comprises a box body and a column. The four corners of the bottom of the box body are equipped with upright columns, the inner cavity of the bottom of the box body is equipped with a trough, and the outer wall of the roller is equipped with multiple A top block, the outer wall of the bottom of the top block is equipped with a collar, the left and right sides of the bottom of the collar are equipped with nuts, the nuts are connected with the inner wall of the roller, and the left and right sides of the top of the collar are installed There are bolts which in turn pass through the collar and the nut. Driven by the motor, this animal husbandry batching device achieves the purpose of making the rollers start to rotate, so that the top block can lift up the supporting plate in a circular manner, so that the proportion of the feed is more accurate. By turning the bolts, the bolts are withdrawn from the nuts, that is, The top block can be removed from the roller, in this way the frequency at which the second channel steel is lifted up in each cycle is changed, thereby changing the outflow of raw materials and achieving the purpose of controlling the feed ratio.

The invention provides a regulator for adjusting a female and male plant ratio of herpetospermum pedunculosum. The regulator is prepared from the following components in percentage by weight: 1 percent to 5 percent of gibberellic acid, 0.001 percent to 0.05 percent of brassin, 0.01 percent to 0.1 percent of abscisic acid, 0.01 percent to 0.1 percent of forchlorfenuron, 0.1 percent to 1 percent of indoleacetic acid, 0.1 percent to 1 percent of indolebutyric acid, 0.1 percent to 1 percent of naphthalene acetic acid, 5 percent to 30 percent of a lytic agent, 1 percent to 10 percent of an emulsifying agent and the balance of ethanol. According to the regulator provided by the invention, seeds are subjected to seed soaking treatment and seedling culture and transplantation are matched; the seedling culture and the transplantation are brought forward; a whole growth period of the herpetospermum pedunculosum is prolonged, and effective regulation and control of the female and male plant ratio of the herpetospermum pedunculosum is realized; the amount of the seeds for production is reduced and the yield is improved.