Abstract: A method for preparing a cationic dyeable flame-retardant high-strength polyester fiber is provided, after mixing oligomer A, oligomer B, and ethylene terephthalate and carrying out a polycondensation reaction to obtain a cationic dyeable flame-retardant polyester masterbatch, adding the cationic dyeable flame-retardant polyester masterbatch to the polyester chips according to a certain ratio for melt spinning, to prepare the cationic dyeable flame-retardant high-strength polyester fiber; oligomer A is prepared by the esterification reaction of a phosphorus flame retardant and a diol; oligomer B is prepared by the esterification reaction of sodium isophthalate sulfonate and a diol; the ratio of the sum of the molar weight of oligomer A and oligomer B to the molar weight of ethylene terephthalate is 3:7-6:4.

Abstract: A method for extracting and enriching gold with a selenide includes: mixing an isocyanate and a selenium-containing compound of a formula of HO—R—Se—R—OH in a solvent to obtain a mixture system, where R is selected from linear or branched C2 to C11 alkylene groups; adding a tin-based catalyst into the mixture system to activate a reaction, drying the mixture system after the reaction, and obtaining a powdery selenium-containing polymer by grinding; immersing the selenium-containing polymer in an aqueous solution containing gold ions to allow gold to be extracted from the aqueous solution; and removing the selenium-containing polymer attached to a surface of extracted gold, thereby obtaining an extracted and enriched gold.

Abstract: A method for extracting and enriching gold with a selenide includes: mixing an isocyanate and a selenium-containing compound of a formula of HO—R—Se—R—OH in a solvent to obtain a mixture system, where R is selected from linear or branched C2 to C11 alkylene groups; adding a tin-based catalyst into the mixture system to activate a reaction, drying the mixture system after the reaction, and obtaining a powdery selenium-containing polymer by grinding; immersing the selenium-containing polymer in an aqueous solution containing gold ions to allow gold to be extracted from the aqueous solution; and removing the selenium-containing polymer attached to a surface of extracted gold, thereby obtaining an extracted and enriched gold.

Abstract: An orthogonal gate extended drain MOSFET (EDMOS) structure provides a low gate-to-drain capacitance (CGD) and exhibits increased reliability. It has a gate electrode that is folded into the shallow trench isolation (STI) oxide region. Horizontal and vertical gate electrode segments provide gate control. It accommodates both high voltage devices and standard CMOS components on the same substrate. Reduced surface field (RESURF) technology is employed to optimize tradeoffs between high breakdown voltage and specific on-resistance. Device fabrication steps are compatible with standard CMOS flow and process modules can be added or removed from baseline CMOS technology.

Abstract: An orthogonal gate extended drain MOSFET (EDMOS) structure provides a low gate-to-drain capacitance (CGD) and exhibits increased reliability. It has a gate electrode that is folded into the shallow trench isolation (STI) oxide region. Horizontal and vertical gate electrode segments provide gate control. It accommodates both high voltage devices and standard CMOS components on the same substrate. Reduced surface field (RESURF) technology is employed to optimize tradeoffs between high breakdown voltage and specific on-resistance. Device fabrication steps are compatible with standard CMOS flow and process modules can be added or removed from baseline CMOS technology.