109results about How to "Improve negative effects" patented technology

The invention relates to an optical fiber large in effective area. The optical fiber large in the effective area comprises a fiber core layer and a covering layer. The optical fiber large in the effective area is characterized in that the fiber core layer comprises an inner core layer and an outer core layer, the radius r1 of the inner core layer is 1 to 4 microns, a relative refractive index difference delta 12 of the inner core layer to the outer core layer meets the condition that -0.2% <= delta 12 < 0%, the relative refractive index difference of the inner core layer to the outer core layer is invariant or gradually increased along with increasing of the radius, the radius r2 of the outer layer is 4 to 7 microns, and the relative refractive index difference delta 2 of the outer core layer is -0.15 % to 0.05 %; the covering layer comprises an inner covering layer, a sunk concave covering layer and an outer covering layer, the inner covering layer covers the fiber core layer, the radius r3 of the inner covering layer is 7 to 20 microns, the relative refractive index difference delta 3 is within the range of -0.5 % to -0.1 %, the radius r4 of the sunk concave covering layer is 12 to 40 microns, the relative refractive index difference delta 4 is within the range of -1.0 % to -0.3 %, and the relative refractive index difference delta 5 is within the range of -0.2% to -0.4%. The optical fiber large in the effective area has a large effective area, quite low transmission loss and good curve characteristics, and is particularly suitable for application of a long-distance high-speed large-volume communication system.

The invention relates to a preparation method of amino-terminated hyperbranched polysiloxane-modified water-based polyurethane. Firstly, 3-aminopropyltriethoxysilane (kh550) and trimethylchlorosilane (TMCS) are used as raw materials and hydrolyzed Condensation preparation of amino-terminated hyperbranched polysiloxanes (HPSi‑NH 2 ). HPSi‑NH 2 As a crosslinking agent, it reacts with polyurethane prepolymer (PPU) to branch and extend the chain to obtain amino-terminated hyperbranched polysiloxane modified waterborne polyurethane (HSiPU). At the same time, the degree of reaction is controlled by adding an end-capping agent during the synthesis process. , the modified waterborne polyurethane has the performance advantages of traditional silicone waterborne polyurethane, and at the same time reduces the phase separation of silicone modified waterborne polyurethane, increases the mechanical properties and bonding properties of the product, and the obtained emulsion has excellent comprehensive properties and can be used as Leather adhesive or water resistant coating.

According to some embodiments, system and methods for image improvement comprise: receiving a plurality of frames of a given region of interest, the frames comprised of a plurality of pixels; determining, based on a quantum property of the frames, a normalized pixel intensity value for each pixel of each of the plurality of frames; and generating an improved image of the given region of interest based on the plurality of frames and the corresponding normalized pixel intensity values for the frames, the order of the image being two. Also embodiments for generating an image of a target illuminated by quantum entangled particles, such as, photons, are disclosed.