提出一种改进的ZORA(Zeroth-Order Regular Approximation to the Dirac Equation)方法,其单电子方程为:[σ·p(c^2/(2c^2-V_0))σ·p+V(r)]Ψ=εΨ式中VO为空间限域的势能函数:V_0(r=sum from A to(V_0~A(r_A)),r_A=|r-R_A|,V_...提出一种改进的ZORA(Zeroth-Order Regular Approximation to the Dirac Equation)方法,其单电子方程为:[σ·p(c^2/(2c^2-V_0))σ·p+V(r)]Ψ=εΨ式中VO为空间限域的势能函数:V_0(r=sum from A to(V_0~A(r_A)),r_A=|r-R_A|,V_0~A(r_A)=V^A(r_A{1+exp[α(r_A-r_0~A)]}^(-1)其中A表示分子的某个组成原子,R_A为A原子的位置矢量,V^A(r_A)为自由A原子的势函数,α和r_0~A为参数.改进的ZORA方法具有原来方法的所有优点,避免了原有ZORA方法因不满足标度变换不变性带来的缺陷,而且计算过程简单.具体计算表明,通过适当选择参数α和r_0~A,用本研究提出来的方法,在计算分子几何结构和键合能时,基本上消除了ZORA方法由于标度变换依赖性产生的误差.展开更多
哈莱姆文艺复兴主流作家以各种为由责罚左拉·赫斯顿使之埋没了将近三十年,本文试图探讨这种责难背后的真相——赫斯顿所持的"另类"种族观。通过浓缩版自传Slavery Gave Me Nothing To Lose和其他作品研读,对比赫斯顿与...哈莱姆文艺复兴主流作家以各种为由责罚左拉·赫斯顿使之埋没了将近三十年,本文试图探讨这种责难背后的真相——赫斯顿所持的"另类"种族观。通过浓缩版自传Slavery Gave Me Nothing To Lose和其他作品研读,对比赫斯顿与兰斯顿·休斯、理查德·怀特作品中的种族观差异,并探究差异缘由。展开更多
Cecily Swanson argues that“modernism's Gurdjieff craze in fact played a surprising role in the development of an overlooked canon of popular autobiographies:Muriel Draper's memoir,Music at Midnight;Margaret A...Cecily Swanson argues that“modernism's Gurdjieff craze in fact played a surprising role in the development of an overlooked canon of popular autobiographies:Muriel Draper's memoir,Music at Midnight;Margaret Anderson's memoir,My Thirty Years'War;and Kathryn Hulme's autobiographical novel,We Lived As Children.”Swanson reads Draper,Anderson,and Hulme because they wrote as esotericists,while she divorces the memoirs from any overt esoteric influences,contents,or aesthetics.There is no need to search further for the source of the mode of the popular autobiographies by Anderson and Draper than what of Loos's novel comes through the Peggy Hopkins Joyce/Zora Neale Hurston memoir.Marriage,Men,and Me appears near the commencement of a line of esoteric memoirs that becomes visible in the best-selling works by Draper and Anderson but then continues expansively.展开更多
文摘提出一种改进的ZORA(Zeroth-Order Regular Approximation to the Dirac Equation)方法,其单电子方程为:[σ·p(c^2/(2c^2-V_0))σ·p+V(r)]Ψ=εΨ式中VO为空间限域的势能函数:V_0(r=sum from A to(V_0~A(r_A)),r_A=|r-R_A|,V_0~A(r_A)=V^A(r_A{1+exp[α(r_A-r_0~A)]}^(-1)其中A表示分子的某个组成原子,R_A为A原子的位置矢量,V^A(r_A)为自由A原子的势函数,α和r_0~A为参数.改进的ZORA方法具有原来方法的所有优点,避免了原有ZORA方法因不满足标度变换不变性带来的缺陷,而且计算过程简单.具体计算表明,通过适当选择参数α和r_0~A,用本研究提出来的方法,在计算分子几何结构和键合能时,基本上消除了ZORA方法由于标度变换依赖性产生的误差.
文摘哈莱姆文艺复兴主流作家以各种为由责罚左拉·赫斯顿使之埋没了将近三十年,本文试图探讨这种责难背后的真相——赫斯顿所持的"另类"种族观。通过浓缩版自传Slavery Gave Me Nothing To Lose和其他作品研读,对比赫斯顿与兰斯顿·休斯、理查德·怀特作品中的种族观差异,并探究差异缘由。
文摘Cecily Swanson argues that“modernism's Gurdjieff craze in fact played a surprising role in the development of an overlooked canon of popular autobiographies:Muriel Draper's memoir,Music at Midnight;Margaret Anderson's memoir,My Thirty Years'War;and Kathryn Hulme's autobiographical novel,We Lived As Children.”Swanson reads Draper,Anderson,and Hulme because they wrote as esotericists,while she divorces the memoirs from any overt esoteric influences,contents,or aesthetics.There is no need to search further for the source of the mode of the popular autobiographies by Anderson and Draper than what of Loos's novel comes through the Peggy Hopkins Joyce/Zora Neale Hurston memoir.Marriage,Men,and Me appears near the commencement of a line of esoteric memoirs that becomes visible in the best-selling works by Draper and Anderson but then continues expansively.
