CAD system and NC-working on the sawteeth shape were disscussed.Automatic programming was realized by senior language in this system and by means of test,conclutsion was available satisfied.
An additional lower hybrid wave （LHW） with a higher refractive index （N//） was investigated in the HT-7 tokamak to bridge the spectral gap. It was found that the spectral gap between the wave and the electrons in ...An additional lower hybrid wave （LHW） with a higher refractive index （N//） was investigated in the HT-7 tokamak to bridge the spectral gap. It was found that the spectral gap between the wave and the electrons in the outer region was bridged by the additional wave with a higher N// spectrum. The results showed that the sawteeth oscillation was suppressed by launching the additional wave, and that the power deposition profile was moved outwards and the current profile was broadened due to the application of the additional wave. Our study indicates that the spectral gap may be bridged by an additional wave with a higher N// spectrum in the outer region.展开更多
The sawtooth-like oscillations resulting from the m/n=2/1 double tearing mode(DTM)are numerically investigated through the three-dimensional,toroidal,nonlinear resistive-MHD code(CLT).We find that the nonlinear evolut...The sawtooth-like oscillations resulting from the m/n=2/1 double tearing mode(DTM)are numerically investigated through the three-dimensional,toroidal,nonlinear resistive-MHD code(CLT).We find that the nonlinear evolution of the m/n=2/1 DTM can lead to sawtooth-like oscillations,which are similar to those driven by the kink mode.The perpendicular thermal conductivity and the external heating rate can significantly alter the behaviors of the DTM driven sawtooth-like oscillations.With a high perpendicular thermal conductivity,the system quickly evolves into a steady state with m/n=2/1 magnetic islands and helical flow.However,with a low perpendicular thermal conductivity,the system tends to exhibit sawtooth-like oscillations.With a sufficiently high or low heating rate,the system exhibits sawtooth-like oscillations,while with an intermediate heating rate,the system quickly evolves into a steady state.At the steady state,there exist the non-axisymmetric magnetic field and strong radial flow,and both are with helicity of m/n=2/1.Like the steady state with m/n=1/1 radial flow,which is beneficial for preventing the helium ash accumulation in the core,the steady state with m/n=2/1 radial flow might also be a good candidate for the advanced steady state operations in future fusion reactors.We also find that the behaviors of the sawtooth-like oscillations are almost independent of tokamak geometry,which implies that the steady state with saturated m/n=2/1 islands might exist in different tokamaks.展开更多
用微晶纤维素层析法和双波长薄层锯形扫描法,对红松(Pinus koraiensis Sieb. et Zucc)籽仁的氨基酸成份和含量进行定性和定量分析,分析结果:红松籽仁中至少含有17种氨基酸,其含量最小的为酪氨酸(0.37％),最大为谷氨酸(7.96％),贮藏时间...用微晶纤维素层析法和双波长薄层锯形扫描法,对红松(Pinus koraiensis Sieb. et Zucc)籽仁的氨基酸成份和含量进行定性和定量分析,分析结果:红松籽仁中至少含有17种氨基酸,其含量最小的为酪氨酸(0.37％),最大为谷氨酸(7.96％),贮藏时间对红松籽仁氨基酸含量有明显影响,大部分种类氨基酸的含量随贮藏时间增加而减少,红松种仁含氨基酸总量比苏联西伯利亚红松(P.sibirca)籽仁含氨基酸总量高7.64％。展开更多
文摘CAD system and NC-working on the sawteeth shape were disscussed.Automatic programming was realized by senior language in this system and by means of test,conclutsion was available satisfied.
基金the Knowledge Innovation Program of the Chinese Academy of Sciences (No.075FCQ0127)National Natural Science Foundation of China (Nos.10575104,10805057)
文摘An additional lower hybrid wave （LHW） with a higher refractive index （N//） was investigated in the HT-7 tokamak to bridge the spectral gap. It was found that the spectral gap between the wave and the electrons in the outer region was bridged by the additional wave with a higher N// spectrum. The results showed that the sawteeth oscillation was suppressed by launching the additional wave, and that the power deposition profile was moved outwards and the current profile was broadened due to the application of the additional wave. Our study indicates that the spectral gap may be bridged by an additional wave with a higher N// spectrum in the outer region.
基金supported by National MCF Energy R&D Program of China(Nos.2019YFE03090500 and 2019YFE03030004)National Natural Science Foundation of China(Nos.12005185,11775188 and 11835010)Fundamental Research Fund for Chinese Central Universities(No.2021FZZX003-03-02)。
文摘The sawtooth-like oscillations resulting from the m/n=2/1 double tearing mode(DTM)are numerically investigated through the three-dimensional,toroidal,nonlinear resistive-MHD code(CLT).We find that the nonlinear evolution of the m/n=2/1 DTM can lead to sawtooth-like oscillations,which are similar to those driven by the kink mode.The perpendicular thermal conductivity and the external heating rate can significantly alter the behaviors of the DTM driven sawtooth-like oscillations.With a high perpendicular thermal conductivity,the system quickly evolves into a steady state with m/n=2/1 magnetic islands and helical flow.However,with a low perpendicular thermal conductivity,the system tends to exhibit sawtooth-like oscillations.With a sufficiently high or low heating rate,the system exhibits sawtooth-like oscillations,while with an intermediate heating rate,the system quickly evolves into a steady state.At the steady state,there exist the non-axisymmetric magnetic field and strong radial flow,and both are with helicity of m/n=2/1.Like the steady state with m/n=1/1 radial flow,which is beneficial for preventing the helium ash accumulation in the core,the steady state with m/n=2/1 radial flow might also be a good candidate for the advanced steady state operations in future fusion reactors.We also find that the behaviors of the sawtooth-like oscillations are almost independent of tokamak geometry,which implies that the steady state with saturated m/n=2/1 islands might exist in different tokamaks.
文摘用微晶纤维素层析法和双波长薄层锯形扫描法,对红松(Pinus koraiensis Sieb. et Zucc)籽仁的氨基酸成份和含量进行定性和定量分析,分析结果:红松籽仁中至少含有17种氨基酸,其含量最小的为酪氨酸(0.37％),最大为谷氨酸(7.96％),贮藏时间对红松籽仁氨基酸含量有明显影响,大部分种类氨基酸的含量随贮藏时间增加而减少,红松种仁含氨基酸总量比苏联西伯利亚红松(P.sibirca)籽仁含氨基酸总量高7.64％。
