用制备型高效液相色谱分离石油亚砜的馏分

用经典硅胶柱色谱法对石油亚砜 (PSO)进行预分离。PSO被分成 4个馏分 (分别记为PSO1,PSO2 ,PSO3和PSO4)。所用的流动相及洗脱顺序 :苯、二氯甲烷、甲醇 二氯甲烷 (1∶1体积比 )、甲醇。经预分离后 ,PSO中的亚砜成分主要富集在馏分PSO3和PSO2中。用高效制备液相色谱法对这两馏分作进一步的分离和纯化。PSO2的色谱条件是 :色谱柱 μ BondapakC1 85 7mm× 30 0mm ;流动相为二氯甲烷、环己烷、甲醇混合液 ,收集经纯化后的组分PSO2g2 2 ;PSO3被分离为 7个馏分 ,其色谱条件为 :色谱柱μ BondapakC1 85 7mm× 30 0mm ;流动相为 70 %～ 10 0 %甲醇 水 ;梯度洗脱其流量为 80mL min ;进样量为80mL 次 (PSO3用 70 %甲醇 水稀释 10倍 )。取其中较纯的馏分PSO3c ,PSO3e ,PSO3g作进一步的色谱纯化 ,色谱条件为C1 8半制备色谱柱 7.8mm× 30 0mm ;流速 :2 0mL min ;流动相 :甲醇 水 70∶ 30 ,V/V(PSO3c)″80∶2 0 ,V V(PSO3e) ;85∶15 ,V V(PSO3g) ;检测器UV 2 5 4nm     

解变分不等式问题的混合方法

By using Fukushima‘s differentiable merit function,Taji,Fukushima and Ibaraki have given a globally convergent modified Newton method for the strongly monotone variational inequality problem and proved their method to be quadratically convergent under certain assumptions in 1993. In this paper a hybrid method for the variational inequality problem under the assumptions that the mapping F is continuously differentiable and its Jacobian matrix F(x) is positive definite for all x∈S rather than strongly monotone and that the set S is nonempty, polyhedral,closed and convex is proposed. Armijo-type line search and trust region strategies as well as Fukushima‘s differentiable merit function are incorporated into the method. It is then shown that the method is well defined and globally convergent and that,under the same assumptions as those of Taji et al. ,the method reduces to the basic Newton method and hence the rate of convergence is quadratic. Computational experiences show the efficiency of the proposed method.     

A Schr?dinger formulation research for light beam propagation

The wave equation of light beam propagation was written in the form of an axial-coordinate-dependent Schr?dinger equation, and the expectation value of a dynamical variable, the trial function of variational approach and the ABCD law were discussed by use of quantum mechanics approach. In view of the evolution equations of expectation values of dynamical variables in the framework of quantum mechanics, the definition of a potential function representing the beam propagation stability and its universal formula with the quality factor, the universal formula of beam width and curvature radius for a paraxial beam and cylindrically symmetric non-paraxial beam, the general formula of second derivative of beam width with respect to the axial coordinate of beam for a paraxial beam, and the general criteria of the conservation of beam quality factor and the existence of a potential well of a potential function for a paraxial beam, were given or derived, respectively. Starting with the same trial function, the comparative research of our formulation with variational approach was done, which gave some further insight into the physical nature of a beam propagation parameters. The ABCD law of nonparaxial beam was discussed in terms of the definition of the non-paraxial expectation value of a dynamical variable for the first time. The applications to the media of constant second derivative of beam width with respect to the axial coordinate of a beam, square law media and the media of constant refractive index in the momentum representation were discussed, respectively.     

Convergence of modulus-based matrix splitting iteration method for a class of nonlinear complementarity problems

Numerical Algorithms - In this paper, we discuss the modulus-based matrix splitting iteration method for solving a class of nonlinear complementarity problems under a weakened condition, and...     

e~＋e~－湮没中不同味道夸克喷注带电粒子多重数差别

利用“夸克产生律”与“夸克组合律”计算了ｅ＋ｅ－湮没中重夸克喷注事例的带电粒子多重数，结果与实验符合．并与轻夸克喷注事例及平均夸克味道喷注事例的多重数做了比较．     

真空中线性啁啾时空高斯脉冲传输特性的分析

利用稳态相位点的方法研究了线性啁啾时空高斯脉冲传输过程中的相位特性，并在二阶近似的情况下讨论了其传输过程中的时空特性，两种方法从不同侧面得出了相同的结论，即：时空高斯脉冲在传输的过程中，在无穷远处交退化为球面波，或者在旁轴近似的情况下退化为平面波。     

花花柴的核型分析

实验用的花花柴的种子来自中国科学院吐鲁番沙漠植物园。实验结果表明花花柴细胞染色体数目为2n=20,根据Leran等染色体命名法则,花花柴的核型模式应为:K(2n)=2x=20m。按Stebbins的核型不对称分级标准属于“1A”型。     

Evanescent Waves and Energy Conservation

ＥｖａｎｅｓｃｅｎｔＷａｖｅｓａｎｄＥｎｅｒｇｙＣｏｎｓｅｒｖａｔｉｏｎＣＡＯＱｉｎｇ；ＤＥＮＧＸｉｍｉｎｇ（ＮａｔｉｏｎａｌＬａｂｏｒａｔｏｒｙｏｎＨｉｇｈＰｏｗｅｒＬａｓｅｒａｎｄＰｈｙｓｉｃｓ，ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃｓ...     

高功率宽频带激光的高效谐波转换及其新进展

介绍了高功率宽带激光谐波转换的意义、理论处理和高效转换方式，在讨论和分析已有的光谱角色散和晶体级联方式的特点和局限性的基础上，提出可能的改善途径及其应用前景，并提出和研究了适用于小口径多路高功率激光系统的新型ＬＢＯ晶体方式。     

Propagation and Beam Quality of Flattened Hermite-Gauss Beams

ＰｒｏｐａｇａｔｉｏｎａｎｄＢｅａｍＱｕａｌｉｔｙｏｆＦｌａｔｔｅｎｅｄＨｅｒｍｉｔｅ－ＧａｕｓｓＢｅａｍｓ￥ＨＵＡＲｅｎｚｈｏｎｇ；ＱＩＡＮＬｉｅｊｉａ，ＦＡＮＤｉａｎｙｕａｎ；ＤＥＮＣＸｉｍｉｎｇ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃ...