本文基于因果推断理论,提出根据病人的生物标记物进行最优治疗方案选择的统计方法.这种方法是基于CATE(conditional average treatment effect)曲线以及CATE曲线的置信带(SCB)的.CSTE曲线表示给定生物标记物(协变量)的条件下,处理组的...本文基于因果推断理论,提出根据病人的生物标记物进行最优治疗方案选择的统计方法.这种方法是基于CATE(conditional average treatment effect)曲线以及CATE曲线的置信带(SCB)的.CSTE曲线表示给定生物标记物(协变量)的条件下,处理组的条件平均处理效应.同时,CATE曲线及其SCB可以被用于对特定的治疗方案选择适宜的病人.文中利用B样条方法估计CATE曲线及其CSB,并推导了其近似大样本性质.文中还通过模拟比较研究了CATE曲线的置信带的有限样本性质,并阐述了CATE曲线及其置信带在真实数据中如何选择最优治疗方案.展开更多
The mechanism of inoculation in the case of suspension casting process has been studied through solidification kinetics. The effect of suspension casting process on temperature field, solidification rate, temperature ...The mechanism of inoculation in the case of suspension casting process has been studied through solidification kinetics. The effect of suspension casting process on temperature field, solidification rate, temperature gap of crystallization, effective distribution coefficient of solute and nucleation frequency during solidification process in steel ingot were discussed on the base of experiments. It has been found that the suspension casting process can increase both cooling at and solidification rate of steel ingot, improve the temperature field and solute distribution, narrow the temperature gap of crystallication, and increase the nucleation frequency. Thus, the solidification time can be shorten, the solute can be well distributied, the shrinkage porosity can be reduced and the grain of crystallization can be fined.展开更多
Let A. （R） be a real Clifford algebra and Gan open connected set in R<sup>n</sup> . By [1], the function with val-ues in A<sub>n</sub> （R） may be written aswhere B ={r<sub>1</sub&g...Let A. （R） be a real Clifford algebra and Gan open connected set in R<sup>n</sup> . By [1], the function with val-ues in A<sub>n</sub> （R） may be written aswhere B ={r<sub>1</sub>,r<sub>2</sub>,…,r<sub>h</sub>} {1,2,…,n}represent that from the sum for’lst and 2nd indi-sates respectively, and we have the following result.Theorem A Function f （x） with values in A. （R） is regular in G if and only ifLet G be the unit hyperball and L the unit hypersphere. Cutting G by the plane: x<sub>3</sub>= a<sub>3</sub>, …,x<sub>n</sub> = a<sub>n</sub>（n3） , we obtain a section domain G<sub>a</sub> in the x<sub>1</sub>x<sub>2</sub> plane. Let L<sub>a</sub> be the boundary of G<sub>a</sub>, and its center is writ-ten as 0<sub> </sub> = （0,0,α<sub>3</sub>,...,α<sub>n</sub>） .展开更多
We have detected the mutagenicity of organic extract materials(OEM) of polluted river water and drinking water near the river.The results of Ames-test indicate the OEM can induce positivemutagenicity in TA98,TA97 and ...We have detected the mutagenicity of organic extract materials(OEM) of polluted river water and drinking water near the river.The results of Ames-test indicate the OEM can induce positivemutagenicity in TA98,TA97 and TA102.The results of SOS-chro-matest show 0.25 liters of river water or 2.0 liters of展开更多
Development of a Fission Neutron Spectrum from a D-T Neutron Generator by Spectrum Subtraction Technique.Wade W.Scates 1,Bradley J.Schrader 2,Konner M.Casanova 3.(1.Criticality Safety Engineering Department,Idaho Nati...Development of a Fission Neutron Spectrum from a D-T Neutron Generator by Spectrum Subtraction Technique.Wade W.Scates 1,Bradley J.Schrader 2,Konner M.Casanova 3.(1.Criticality Safety Engineering Department,Idaho National Laboratory,P.O.Box 1625,Idaho Falls,ID 83415-3458;2.Radiation Safety Department,Idaho National Laboratory,P.O.Box 1625,Idaho Falls,ID 83415-3405;3.Criticality Safety Engineering Department,Idaho National Laboratory,P.O.Box 1625,Idaho Falls,ID 83415-3458)展开更多
Recently,the isospin fractionation thereby the neutron to proton(N/Z)ratio of the low density region significantly exceeds that of the high density region in nuclear multifragmentation has been an active subject both ...Recently,the isospin fractionation thereby the neutron to proton(N/Z)ratio of the low density region significantly exceeds that of the high density region in nuclear multifragmentation has been an active subject both theoretically and experimentally^([1,2]).In this work,the static and dynamical interpretations of the isospin fractionation is presented.Fig.1 shows the neutron chemical potential of the high density region and the展开更多
基金supported by the National Natural Science Foundataion of China(Grant No.81773546)。
文摘本文基于因果推断理论,提出根据病人的生物标记物进行最优治疗方案选择的统计方法.这种方法是基于CATE(conditional average treatment effect)曲线以及CATE曲线的置信带(SCB)的.CSTE曲线表示给定生物标记物(协变量)的条件下,处理组的条件平均处理效应.同时,CATE曲线及其SCB可以被用于对特定的治疗方案选择适宜的病人.文中利用B样条方法估计CATE曲线及其CSB,并推导了其近似大样本性质.文中还通过模拟比较研究了CATE曲线的置信带的有限样本性质,并阐述了CATE曲线及其置信带在真实数据中如何选择最优治疗方案.
文摘The mechanism of inoculation in the case of suspension casting process has been studied through solidification kinetics. The effect of suspension casting process on temperature field, solidification rate, temperature gap of crystallization, effective distribution coefficient of solute and nucleation frequency during solidification process in steel ingot were discussed on the base of experiments. It has been found that the suspension casting process can increase both cooling at and solidification rate of steel ingot, improve the temperature field and solute distribution, narrow the temperature gap of crystallication, and increase the nucleation frequency. Thus, the solidification time can be shorten, the solute can be well distributied, the shrinkage porosity can be reduced and the grain of crystallization can be fined.
文摘Let A. （R） be a real Clifford algebra and Gan open connected set in R<sup>n</sup> . By [1], the function with val-ues in A<sub>n</sub> （R） may be written aswhere B ={r<sub>1</sub>,r<sub>2</sub>,…,r<sub>h</sub>} {1,2,…,n}represent that from the sum for’lst and 2nd indi-sates respectively, and we have the following result.Theorem A Function f （x） with values in A. （R） is regular in G if and only ifLet G be the unit hyperball and L the unit hypersphere. Cutting G by the plane: x<sub>3</sub>= a<sub>3</sub>, …,x<sub>n</sub> = a<sub>n</sub>（n3） , we obtain a section domain G<sub>a</sub> in the x<sub>1</sub>x<sub>2</sub> plane. Let L<sub>a</sub> be the boundary of G<sub>a</sub>, and its center is writ-ten as 0<sub> </sub> = （0,0,α<sub>3</sub>,...,α<sub>n</sub>） .
文摘We have detected the mutagenicity of organic extract materials(OEM) of polluted river water and drinking water near the river.The results of Ames-test indicate the OEM can induce positivemutagenicity in TA98,TA97 and TA102.The results of SOS-chro-matest show 0.25 liters of river water or 2.0 liters of
文摘Recently,the isospin fractionation thereby the neutron to proton(N/Z)ratio of the low density region significantly exceeds that of the high density region in nuclear multifragmentation has been an active subject both theoretically and experimentally^([1,2]).In this work,the static and dynamical interpretations of the isospin fractionation is presented.Fig.1 shows the neutron chemical potential of the high density region and the
