Effects of Distiller's Grain Substrate with Acid Regulation on the Growth of Tobacco Seedlings in Floating Breeding System

In order to reduce the use of peat resources and realize the sustainable development of tobacco, the pH of distiller s grain substrate was adjusted with humic acid, and the effects of various distiller s grain substrates on the growth of tobacco seedlings were studied to find out the method of cultivating high-quality tobacco seedlings by using distiller s grain substrate. The results showed that when 60% of humic acid was added to the distiller s grain substrate made from coarse distiller s grains, fine distiller s grains, perlite and vermiculite, both the pH and electrical conductivity decreased significantly and were similar to that of the conventional substrate. Moreover, the emergence rate of tobacco seedlings, the rate of strong tobacco seedlings, leaf number, stem height, root growth and quality of tobacco seedlings were good.

Design of a finite impulse response filter for rapid single-flux-quantum signal processors based on stochastic computing

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.

A COVID-19 Patient Discharged According to Strict Discharge Standards:Viral Negativity in Both Nasopharynx and Feces

Severe acute respiratory syndrome Coronavirus 2(SARS-CoV-2)currently has spread all over the world.However,the dynamic characteristics of SARS-CoV-2 infections have not previously been described in detail.Here,we report a cured patient in West China Hospital,and describe the dynamic detection of SARS-CoV-2-RNA in different specimens and viral specific IgM and IgG antibodies in blood.The findings suggest that the fecal SARS-CoV-2-RNA negativity may be considered as a new standard for de isolation.Serum IgM and IgG antibodies detection were helpful for early diagnosis of SARS-CoV-2 infection and judgment of patients in recovery stage,respectively.