Abstract: The present invention belongs to the field of pharmaceutical and chemical engineering, and relates to a high-purity losartan potassium and a preparation method therefor. The present invention also relates to a high-purity losartan or a pharmaceutically acceptable salt thereof and a preparation method therefor. The present invention uses organic phosphorus to reduce an azide compound to an amino compound so that the genotoxicity of losartan or a pharmaceutically acceptable salt thereof can be well controlled. The method of the present invention involves fewer steps, uses a small amount of reagent, does not require activated carbon decolorization, and produces a high-purity product, and therefore is suitable for industrial production and is very practical.

Abstract: A multifunctional fiber with full-spectrum infrared radiation, flame retardant and antibacterial functions, including a composite masterbatch having a water content of 30-50 ppm and accounting for 10-12% by weight, polyethylene terephthalate having a water content of 25-30 ppm or polycaprolactam high polymer having a water content of 50-70 ppm and accounting for 88-90% by weight; the fiber and its fabric possess multiple functions such as spectral heating, flame retardancy, anti-bacteria and anti-virus; after being illuminated for 5-10 minutes, the temperature difference of the fiber fabric of the present invention is higher than 15-20° C., the far-infrared emissivity is greater than 98%, the radiation temperature rise is greater than 3.0° C., the CLO value is greater than 0.5, the heat transfer coefficient is greater than 18.0w/(m2k), and the thermal resistance is less than 0.05 (m2k)/w.

Abstract: The embodiments of the present application disclose a method for acquiring a converted wave, an electronic device, and a readable storage medium, wherein the method for acquiring a converted wave comprises: acquiring a relational expression between a P-wave reflection coefficient and an incident angle by Zoeppritz equation; simplifying the relational expression between the P-wave reflection coefficient and the incident angle; calculating a derivative for the simplified relational expression between the P-wave reflection coefficient and the incident angle, to obtain an expression of a wave to be converted; correcting parameters in the expression of the wave to be converted to obtain a converted wave.

Abstract: The embodiments of the present application disclose a method for acquiring a converted wave, an electronic device, and a readable storage medium, wherein the method for acquiring a converted wave comprises: acquiring a relational expression between a P-wave reflection coefficient and an incident angle by Zoeppritz equation; simplifying the relational expression between the P-wave reflection coefficient and the incident angle; calculating a derivative for the simplified relational expression between the P-wave reflection coefficient and the incident angle, to obtain an expression of a wave to be converted; correcting parameters in the expression of the wave to be converted to obtain a converted wave.