35results about How to "Difficult to convert" patented technology

A multifunctional fertilizer is prepared by taking lime nitrogen, superphosphate, calcium magnesium phosphate fertilizer and potassium sulfate as materials, and formulating by proportioning. It achieves to inhibit soil fungus, to prevent soil acidification and salinization, and to improve fertilizer effect.

The invention discloses an alprostadil emulsion determination method used for determining the content of active ingredients alprostadil and impurities prostaglandin A1. The invention carries on the emulsion breaking by utilizing the alcohol mixed organic solvent, then determines the content of alprostadil and prostaglandin A1 by using a high performance liquid chromatography. The method is simple, convenient, easy operation, breaking completely, and effectively controls the quality of products. Compared with the prior art, the method is more economical, quick, accurate and easy operation. Therefore the invention can be used for determining the alprostadil emulsion quality, also detecting the intermediates in the production process.

A voice processing apparatus includes: an error detector which detects an error in a frame containing voice data; a correction value calculator which determines a level of the error detected by the error detector and calculates a correction value according to the level; and a voice data corrector which corrects the voice data by using the correction value calculated by the correction value calculator.

A preparation method of graphene toughened silicon carbide ceramics, comprising the following steps: (A) mixing silicon carbide powder, graphene powder, sintering aid and solvent and pulverizing to prepare silicon carbide slurry; (B) mixing The silicon carbide slurry is dried, pulverized, and sieved to prepare a uniformly mixed composite powder; (C) put the composite powder into a mold and apply unidirectional pressure to obtain a composite powder compact; (D) put the composite powder The mold of the powder compact is put into the sintering furnace, and after the furnace temperature rises to the temperature T1 in a vacuum environment, the cyclic sintering process of temperature rise and pressure-fall temperature and no pressure is carried out to prepare graphene toughened silicon carbide ceramics. The present invention utilizes high temperature pressurization-low temperature pressureless vacuum cycle sintering technology, effectively solves the problems of high sintering temperature, slow densification speed and low density in the prior art, and obtains densification rapidly at a lower temperature Higher graphene toughened silicon carbide ceramics.

For creeping stems of lawn grass, one or two buds at the front end of the near growth point can sprout, a plurality of buds at the back end are dormant, only one or two buds at each end of the grass item can sprout, a plurality of buds and internodes become the growth substrate for the sprouting buds at the front end, and the stems and leaves trimmed off can be directly used as the growth substrate of the lawn grass. According to the principle, the invention discloses a method for culturing soil-free lawn in a substrate-free mode. The technical scheme comprises selection of grass seeds, collection of items, paving of an insulating layer, sowing of grass items, water management, nutrient management, lawn trimming, prevention and controlling of diseases, insects and natural grass. The method can save the special lawn-culturing substrate, has the advantages of energy conservation and low carbon, rain wash resistance, quick lawn formation, smooth and dense lawn, strong root system, no soil pollution and short rejuvenation period, and is in accordance with the development trend that the quality requirements of lawn in various urban sightseeing greenbelts and playgrounds are higher and higher.

The invention provides a phononic crystal theory-based method for determining a cutter bar structure of an ultrasound knife. The method comprises the following steps of setting the cutter bar structure of the ultrasound knife to be a periodic repetition structure with a variable cross section; configuring the periodic repetition structure into a phononic crystal structure with a variable cross section; forming an energy band structure when an ultrasonic wave is transmitted in phononic crystal of the periodic structure, calculating the energy band structure of the phononic crystal structure with the variable cross section according to a phononic crystal band-gap characteristics calculation method and determining pass band and stop band ranges of longitudinal vibration and bending vibration in the energy band structure; determining the cutter bar structure of the ultrasound knife in pure longitudinal vibration, adjusting the set periodic repetition structure until the working frequency of the ultrasound knife is in the pass band range of the longitudinal vibration and the stop band range of the bending vibration. The periodic structure is introduced into a cutter bar, and the cutter bar structure is adjusted by employing a phononic crystal theory until the working frequency is limited near a pure longitudinal vibration mode, so that the cutter bar structure design of the ultrasound knife in pure longitudinal vibration is achieved.