Inspired by the nature,lotus leaf-derived gradient hierarchical porous C/MoS2 morphology genetic composites(GHPCM)were successfully fabricated through an in situ strategy.The biological microstructure of lotus leaf wa...Inspired by the nature,lotus leaf-derived gradient hierarchical porous C/MoS2 morphology genetic composites(GHPCM)were successfully fabricated through an in situ strategy.The biological microstructure of lotus leaf was well preserved after treatment.Different pores with gradient pore sizes ranging from 300 to 5μm were hierarchically distributed in the composites.In addition,the surface states of lotus leaf resulted in the Janus-like morphologies of MoS2.The GHPCM exhibit excellent electromagnetic wave absorption performance,with the minimum reflection loss of−50.1 dB at a thickness of 2.4 mm and the maximum effective bandwidth of 6.0 GHz at a thickness of 2.2 mm.The outstanding performance could be attributed to the synergy of conductive loss,polarization loss,and impedance matching.In particularly,we provided a brand-new dielectric sum-quotient model to analyze the electromagnetic performance of the non-magnetic material system.It suggests that the specific sum and quotient of permittivity are the key to keep reflection loss below−10 dB within a certain frequency range.Furthermore,based on the concept of material genetic engineering,the dielectric constant could be taken into account to seek for suitable materials with designable electromagnetic absorption performance.展开更多
To the Editor:In China,multiple myeloma(MM)has a crude prevalence of 7 per 100,000 population and an incidence of 1.6 per 100,000 population.[1]The term“1q21 abnormality”refers to genetic alterations including delet...To the Editor:In China,multiple myeloma(MM)has a crude prevalence of 7 per 100,000 population and an incidence of 1.6 per 100,000 population.[1]The term“1q21 abnormality”refers to genetic alterations including deletions,duplications,and amplifications in the 1q21 region of chromosome 1.Gain or amplification of 1q21(1q21+),which refers to an additional copy or multiple copies of genetic material in the long arm of chromosome 1 at position 21,is a well-documented abnormality that correlates with adverse clinical outcomes in patients with MM and has been demonstrated to be associated with poor prognosis,drug resistance,and disease progression in newly diagnosed MM(NDMM)and relapsed/refractory MM(RRMM).[2]However,treatment options specifically for 1q21+patients have seldom been recommended in guidelines due to the lack of clinical data,except for the 2018 Mayo Stratification of Myeloma and Risk-adapted Therapy(mSMART)3.0,which makes recommendations for transplant-eligible NDMM patients.This study aimed to evaluate the effectiveness of treatment regimens for RRMM with 1q21+and to review relevant studies.展开更多
The topic of high-entropy alloys is one of the focus for both physics and materials research.High-entropy alloys were usually defined as solid solution alloys,while the solid solution is different from the traditional...The topic of high-entropy alloys is one of the focus for both physics and materials research.High-entropy alloys were usually defined as solid solution alloys,while the solid solution is different from the traditional terminal solid solution,because the solid solution without solvent element is the dominant one.The discovery of high-entropy alloys greatly extended the composition space and the possibility of creating unique micro-and nano-level structures,which can meet the demands of lightweight and dynamic applications.The relationship between the phases and the parameters for the high-entropy alloys is rather complex.The data driving design can screen the specific high-entropy alloys.The correlation between the composition and properties of highentropy alloys can be discovered by material genetic engineering and data science.展开更多
基金This project was supported by the National Natural Science Foundation of China(Nos.51971162,U1933112,51671146)the Program of Shanghai Technology Research Leader(18XD1423800)the Fundamental Research Funds for the Central Universities(22120180096).
文摘Inspired by the nature,lotus leaf-derived gradient hierarchical porous C/MoS2 morphology genetic composites(GHPCM)were successfully fabricated through an in situ strategy.The biological microstructure of lotus leaf was well preserved after treatment.Different pores with gradient pore sizes ranging from 300 to 5μm were hierarchically distributed in the composites.In addition,the surface states of lotus leaf resulted in the Janus-like morphologies of MoS2.The GHPCM exhibit excellent electromagnetic wave absorption performance,with the minimum reflection loss of−50.1 dB at a thickness of 2.4 mm and the maximum effective bandwidth of 6.0 GHz at a thickness of 2.2 mm.The outstanding performance could be attributed to the synergy of conductive loss,polarization loss,and impedance matching.In particularly,we provided a brand-new dielectric sum-quotient model to analyze the electromagnetic performance of the non-magnetic material system.It suggests that the specific sum and quotient of permittivity are the key to keep reflection loss below−10 dB within a certain frequency range.Furthermore,based on the concept of material genetic engineering,the dielectric constant could be taken into account to seek for suitable materials with designable electromagnetic absorption performance.
文摘To the Editor:In China,multiple myeloma(MM)has a crude prevalence of 7 per 100,000 population and an incidence of 1.6 per 100,000 population.[1]The term“1q21 abnormality”refers to genetic alterations including deletions,duplications,and amplifications in the 1q21 region of chromosome 1.Gain or amplification of 1q21(1q21+),which refers to an additional copy or multiple copies of genetic material in the long arm of chromosome 1 at position 21,is a well-documented abnormality that correlates with adverse clinical outcomes in patients with MM and has been demonstrated to be associated with poor prognosis,drug resistance,and disease progression in newly diagnosed MM(NDMM)and relapsed/refractory MM(RRMM).[2]However,treatment options specifically for 1q21+patients have seldom been recommended in guidelines due to the lack of clinical data,except for the 2018 Mayo Stratification of Myeloma and Risk-adapted Therapy(mSMART)3.0,which makes recommendations for transplant-eligible NDMM patients.This study aimed to evaluate the effectiveness of treatment regimens for RRMM with 1q21+and to review relevant studies.
基金supports from the National Natural Science Foundation of China(Grant No.52273280)the financial support from the National Natural Science Foundation of China(Grant No.52271110)Creative Research Groups of China(Grant No.51921001)。
文摘The topic of high-entropy alloys is one of the focus for both physics and materials research.High-entropy alloys were usually defined as solid solution alloys,while the solid solution is different from the traditional terminal solid solution,because the solid solution without solvent element is the dominant one.The discovery of high-entropy alloys greatly extended the composition space and the possibility of creating unique micro-and nano-level structures,which can meet the demands of lightweight and dynamic applications.The relationship between the phases and the parameters for the high-entropy alloys is rather complex.The data driving design can screen the specific high-entropy alloys.The correlation between the composition and properties of highentropy alloys can be discovered by material genetic engineering and data science.
