Dear Editor,Neurologic manifestations associated with many COVID-19 patients,including acute infection with severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)and long COVID,have been proven by increasing evid...Dear Editor,Neurologic manifestations associated with many COVID-19 patients,including acute infection with severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)and long COVID,have been proven by increasing evidence.1 To date,most studies have focused on how SARS-CoV-2 invades the nervous system and the consequent neuropathological changes.2,3 In contrast,the specific mechanism by which SARS-CoV-2 infection leads to neurological disease remains unclear.展开更多
Rapid‐Single‐Flux‐Quantum(RSFQ)circuit technology is well known for its low power consumption and latency,which enables digital signal processing up to tens of GHz.As a fundamental digital filter,the Finite Impulse...Rapid‐Single‐Flux‐Quantum(RSFQ)circuit technology is well known for its low power consumption and latency,which enables digital signal processing up to tens of GHz.As a fundamental digital filter,the Finite Impulse Response(FIR)filter has wide applications in communication systems.A design of an FIR filter based on RSFQ circuit technology is proposed.However,the FIR filter consumes large amounts of adders and multipliers.Based on Stochastic Computing(SC)theory with which adder and multiplier are much simpler,the hardware cost of FIR filter is dramatically reduced.A novel stochastic number generator(SNG),a stochastic‐tobinary converter(SBC),and the FIR filter were designed and verified via logic simulation with a target frequency of 10 GHz.The results indicated the FIR filter performs correct operations.The proposed FIR filter consists of 2255 Josephson junctions(JJs)without wiring cells(i.e.,Josephson Transmission Lines(JTLs),Passive Transmission Lines(PTLs)),which is acceptable,making it possible to be used in RSFQ digital signal processors.展开更多
基金the National Natural Science Foundation of China(42030508)the Science and Technology Major Project of Tibetan Autonomous Region of China(XZ202201ZD0005G02)the Long-Term Ecological Observation Study of Alpine Pine in Southeast Tibet(Science and Technology Innovation Base)(XZ202301JD0001G).
文摘Dear Editor,Neurologic manifestations associated with many COVID-19 patients,including acute infection with severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)and long COVID,have been proven by increasing evidence.1 To date,most studies have focused on how SARS-CoV-2 invades the nervous system and the consequent neuropathological changes.2,3 In contrast,the specific mechanism by which SARS-CoV-2 infection leads to neurological disease remains unclear.
基金supported in part by the Strategic Priority Research Program of Chinese Academy of Sciences,under Grant XDA18000000.
文摘Rapid‐Single‐Flux‐Quantum(RSFQ)circuit technology is well known for its low power consumption and latency,which enables digital signal processing up to tens of GHz.As a fundamental digital filter,the Finite Impulse Response(FIR)filter has wide applications in communication systems.A design of an FIR filter based on RSFQ circuit technology is proposed.However,the FIR filter consumes large amounts of adders and multipliers.Based on Stochastic Computing(SC)theory with which adder and multiplier are much simpler,the hardware cost of FIR filter is dramatically reduced.A novel stochastic number generator(SNG),a stochastic‐tobinary converter(SBC),and the FIR filter were designed and verified via logic simulation with a target frequency of 10 GHz.The results indicated the FIR filter performs correct operations.The proposed FIR filter consists of 2255 Josephson junctions(JJs)without wiring cells(i.e.,Josephson Transmission Lines(JTLs),Passive Transmission Lines(PTLs)),which is acceptable,making it possible to be used in RSFQ digital signal processors.
