32results about How to "Short method cycle" patented technology

The invention discloses an industrial breeding method for the detoxified group cultured seedlings of bamboo root ginger, which comprises four steps of induction of clustered buds at the shoot tip, subculture of the clustered buds, rooting culture and transplanting of test-tube seedlings. The culture medium, rooting medium and transplanting matrix were optimized, and the obtained method had a high induction rate of clustered buds at the shoot tip; the multiplicity of the clustered shoots was high and the vitrification rate was low; the rooting rate of the sprouts reached 100%, and the root system was strong and vitrified. The lateral buds germinate; the transplanting survival rate is high, and the sprouts are strong and grow quickly; the method of the invention has short cycle and low cost, can fully meet the needs of large-scale cultivation of bamboo root ginger, and has good application prospects.

The invention discloses a plasma modification method for a polytetrafluoroethylene microporous membrane. A low temperature plasma treatment method is adopted for conducting surface modification on the PTFE microporous membrane, process parameters of low-temperature plasma treatment, such as the low-temperature plasma gas type, the treatment distance, the radio-frequency power, the treatment time and the gas circulation volume, are controlled, hydrophilia of the PTFE microporous membrane is improved, the PTFE microporous membrane which is originally quite great in hydrophobicity is modified into the PTFE microporous membrane which is quite great in hydrophilia, the water contact angle is lowered to approximately 40 degrees from the original approximately 13 degrees, and meanwhile mechanical strength of the PTFE microporous membrane is maintained. The plasma modification method is short in cycle and low in cost, commercialized production can be conducted, and the application scope of the PTFE microporous membrane is further expanded.

The present invention provides a method and device for selecting an arcing angle and an insulator string in an overhead power transmission line. arc angle, and determine the withstand voltage value of the preset arc angle; according to the given insulator parameters and the number of insulators, obtain the withstand voltage value of the insulator string; according to the preset arc angle withstand voltage value and the withstand voltage value of the insulator string, calculate the effectiveness index parameter of the preset arcing angle to the insulator string; determine the arcing angle and the insulator string according to the effectiveness index parameter. On the premise of the randomness of the discharge, the present invention facilitates the selection and coordination of the arcing angle and the insulator string, and can provide a reference for the selection and matching of the arcing angle and the insulator string without the need for a complete test, and improves the selection of the arcing angle. The efficiency and reliability of the insulator string are high, and the method has a short cycle and low cost.

The invention relates to the field of genetic resource conservation, particularly relates to the field of animal paternity identification, and discloses a method of establishing an animal paternity identification system on basis of whole genome STR. The method comprises the following steps: 1) looking up whole genome STR loci; 2) preliminarily screening the STR loci; 3) carrying out a primer design; 4) randomly sampling animal populations and extracting genome DNA; 5) verifying the population diversity of the STR loci; 6) carrying out Hardy-Weinberg equilibrium inspection on the STR loci with genetic polymorphism, and screening out the STR loci with the genotype frequency distribution which meets the Hardy-Weinberg equilibrium; 7) evaluating the forensic medicine application value of the STR loci; 8) establishing the STP animal paternity identification system. The method is convenient to operate; the constructed paternity identification system has a paternity exclusion probability of more than 0.99, and is capable of accurately carrying out animal paternity identification, therefore, the paternity identification system can be used for guiding the breeding of rare species, and the identification and breeding of economic species.

The invention discloses a method for measuring ultrasonic propagation time by using a linear frequency modulation signal, which comprises the following steps: generating an excitation signal through a linear frequency modulation signal generator to excite a transmitting transducer to transmit ultrasonic waves, and the transmitted ultrasonic signal passes through the material to be tested and is received and converted After receiving by the transducer, perform wavelet filter processing, then shift the ultrasonic signal to the left, multiply the processed ultrasonic signal with the transmitted ultrasonic signal to obtain the product signal, perform Fourier transform on the product signal to obtain the amplitude spectrum of the product signal and use the maximum The value function determines the frequency of the peak value in the amplitude spectrum, and finally calculates the propagation time of the ultrasonic wave in the material to be tested; the present invention only needs to perform a Fourier transform FFT and signal multiplication operation, and the operation is greatly reduced, thereby realizing the short cycle and high efficiency of the method; The linear frequency modulation signal is used to excite the ultrasonic pulse, which improves the penetration ability of the ultrasonic wave and the time resolution of the ultrasonic detection, thereby improving the detection accuracy.

The invention provides a rapid prototyping method of a magnetorheological composite body, in which a type I magnetorheological elastic material, a type II magnetorheological elastic material, a type I magnetorheological elastic material and a magnetorheological viscoplastic material are used in any The required forms are combined to prepare a magnetorheological composite with non-uniform physical properties. The mixed 3D printing of magnetorheological materials with different physical states and mechanical properties is realized, and flexible digital structure design can be carried out. The forming of solid magnetorheological elastic materials and the packaging of semi-solid magnetorheological viscoplastic materials can be completed at one time. By virtue of the different response characteristics of the mechanical properties of different types of magnetorheological materials under an external magnetic field, it can meet the requirements of complex operating conditions that require magnetorheological materials with different mechanical properties in different positions. The composite prepared by the method of the invention can be used as various functional elements and structural elements such as shock absorbing and damping elements or soft molds for plate forming, and has good performance; meanwhile, the method of the invention has short period, simple process and low cost.

The invention relates to a method for improving the surface enhanced Raman scattering property of nano-porous metal and belongs to the field of nano materials. The method comprises the steps that firstly, an amorphous alloy thin strip serves as a precursor, and through a chemical dealloying method, the three-dimensional bicontinuous nano-porous metal is prepared; and then the nano-porous metal issubjected to ion irradiation of appropriate dose by adopting a high-energy metal ion irradiation source. The surface of the irradiated nano-porous metal is roughed, a ligament becomes thick, holes become small, thus more activity sites can be provided, and enhancement factors of surface enhanced Raman scattering of the nano-porous metal can be increased by 2-10 times. The method is expected to have good application prospects in the fields such as chemical engineering, environments, biological medicines and sensors.

The invention provides a method for preparing astragaloside, and belongs to the technical field of purification of trace components. The method for preparing the astragaloside includes the following steps that an astragalus membranaceus solution containing alcohol extract of astragalus membranaceus is placed in a high performance liquid chromatography column for elution, and when astragaloside appears, fractions of the astragaloside are collected. Through the method, the high purity astragaloside can be obtained, and the method has a short cycle and simple operation.