Abstract: An ?-aminoketone-containing polyfunctionalized macromolecular photoinitiator, which is prepared from a double-bond-containing ?-aminoketone micromolecular photoinitiator A and a polythiol compound B through thiol-ene click reaction. A preparation of the ?-aminoketone-containing polyfunctionalized macromolecular photoinitiator and an application of the ?-aminoketone-containing polyfunctionalized macromolecular photoinitiator in the radiation curing are also provided.

Abstract: The present disclosure relates to methods and systems for image analysis. The method may include obtaining a plurality of image sequences relating to a blood vessel. At least one of the plurality of image sequences may be acquired using a black blood imaging sequence. The method may also include determining a plurality of aligned image sequences by aligning, based on a reference image sequence of the plurality of image sequences, the plurality of image sequences, determining a target region based on the plurality of aligned image sequences, and determining one or more target parameters based on the target region.

Abstract: A fault current limiter, including: two inductors, a direct current circuit breaker, a shunt resistor, a first fixed resistor, and metal oxide arresters. The two inductors include wound superconducting wires. The inductors have identical number of windings and identical structure. Magnetic fluxes of the inductors are forward coupled, and the inductors are connected in parallel to form a superconducting inductor structure. The direct current circuit breaker and the superconducting inductor structure are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker. The metal oxide arresters are two in number, and are connected to two ends of the inductors in parallel.

Abstract: A fault current limiter, including: an inductor, a direct current circuit breaker, a shunt resistor, and a first fixed resistor. The inductor includes wound superconducting wires. The direct current circuit breaker and the inductor are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker.

Abstract: A fault current limiter, including: two inductors, a direct current circuit breaker, a shunt resistor, a first fixed resistor, and metal oxide arresters. The two inductors include wound superconducting wires. The inductors have identical number of windings and identical structure. Magnetic fluxes of the inductors are forward coupled, and the inductors are connected in parallel to form a superconducting inductor structure. The direct current circuit breaker and the superconducting inductor structure are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker. The metal oxide arresters are two in number, and are connected to two ends of the inductors in parallel.

Abstract: A fault current limiter, including: an inductor, a direct current circuit breaker, a shunt resistor, and a first fixed resistor. The inductor includes wound superconducting wires. The direct current circuit breaker and the inductor are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker.