Abstract: Disclosed herein is a medical device, comprising a covalently-bonded heparin coating on a substrate, where the covalently bonded heparin coating is the reaction product of (a) an isocyanate-bearing material on or covalently bonded to the substrate and (b) a heparin molecule selected from one of the formulae in the claims. The current invention also relates to a method of forming the medical device, which may be useful as heart stent or intravascular stent that is hemocompatible for preventing the formation of blood clots.

Abstract: A spiking neural network acceleration method includes constructing an approximate computation model according to a spiking neuron model and a spiking coding mode. The approximate computation model utilizes the characteristic that spiking frequency domain coding ignores the time semantics of a spiking sequence, compresses the distribution of spiking signals on a time step, and greatly reduces a spiking routing process and a subsequent neural computation process. The time-driven accelerator replans the computation process of the spiking neural network, sets a deduplication queue and a bitmap to solve the problem of spiking jitter, and realizes efficient support on the inhibitory spiking neural network.

Abstract: An ultraviolet light-absorbing polymer which comprises a homopolymer of a polymerizable monomer having the structure: ##STR1## wherein: Z is N or --CH--,R is H or CH.sub.3,R.sub.1 and R.sub.2 may be the same or different and are H, alkyl or alkyloxy having from 1 to 20 carbon atoms, alkylcarboxy having from 2 to 20 carbon atoms, arylcarboxy having from 7 to 25 carbon atoms or hydroxyl;R.sub.3 is H, hydroxyl, hydroxyalkyl having from 1 to 20 carbon atoms or siloxy;R.sub.4, R.sub.5, R.sub.6 and R.sub.7 may be the same or different and are H or halogen;x is an integer from 1 to 20; ora copolymer thereof with an ethylenically unsaturated comonomer, the copolymer comprising an ultraviolet light-absorbing effective amount of the ultraviolet light-absorbing polymerizable monomer.

Abstract: An ultraviolet light-absorbing, polymerizable monomer having the structure ##STR1## wherein: Z is N or --CH--,R is H or CH.sub.3,R.sub.1 and R.sub.2 may be the same or different and are H, alkyl or alkyloxy having from 1 to 20 carbon atoms, alkylcarboxy having from 2 to 20 carbon atoms, arylcarboxy having from 7 to 25 carbon atoms or hydroxyl;R.sub.3 is H, hydroxyl, hydroxyalkyl having from 1 to 20 carbon atoms or siloxy;R.sub.4, R.sub.5, R.sub.6 and R.sub.7 may be the same or different and is H or halogen; andx is an integer from 1 to 20.