Static analysis of a long and thick orthotropic circular cylindrical shell of revolution

Summary An elasticity solution has been obtained for a long, thick transversely isotropic circular cylindrical shell subjected to distributed pinch load using a set of three displacement functions. Numerical results are presented for different materials and thickness to mean radius ratios. The results obtained from this analysis have been compared with classical and first-order shear deformation shell theories of Flugge, Sanders, Love and Donnell.     

计算机处理三组分重叠峰法在高效液相色谱法中的应用——钐、钆、镝的同时测定

本文以二甲酚橙为显色剂、甲醇-水(含CTMAB和缓冲溶液)为流动相,利用可编辑的时间程序求得某一保留时间和波长处的电频值对Sm、Gd、Dy混合组分体系进行了考察,提出了一种处理三组分重叠峰法的计算机程序。试验结果表明,该程序简单、快速,计算结果准确度较高。     

Energy and angular distributions of electrons ejected from CH<Subscript>4</Subscript> and C<Subscript>3</Subscript>H<Subscript>8</Subscript> under 16.0 keV electron impact

Relative cross sections, differential in energy and angle, for electrons ejected from CH₄ and C₃H₈ molecules under 16.0 keV electron impact have been measured. Electrons were analyzed by a 45° parallel plate electrostatic analyzer at emission angles varying from 60° to 135° with energies from 50 eV to 1000 eV. The angular distributions of electrons exhibit structures which are found to arise from Coulomb and non-Coulomb interactions. Furthermore, the double differential cross sections of electrons ejected from C₃H₈ molecule are found to be higher in magnitude than those from CH₄. This result supports the fact that the number of ejected electrons participating in collisions with C₃H₈ molecules is more than that in CH₄. Also, the angular distributions of C-K-shell Auger electrons emitted from the target molecules have been studied and shown to be isotropic within the experimental uncertainty     

眼镜王蛇神经毒素CM—11^1H谱的计算机辅助谱峰自动归属

２ＤＮＭＲ谱的自动归属是核磁共振发展的一个方向，ＣＡＰＲＩ即是蛋白质１Ｈ谱的计算机辅助谱峰归属的一种程序。作者将其应用于眼镜王蛇神经毒素ＣＭ－１１１Ｈ谱的归属，讨论了ＣＡＰＲＩ的功能和特点以及运用在ＣＭ－１１后得到的分析结果。     

胶束电动力学毛细管色谱中峰的定性方法

从理论上探讨了在胶束电动力学毛细管色谱中采用迁移时间来定性的不足，提出将相对有效淌度用于该体系下尿中核苷组分的定性。结果表明：使用相对有效淌度作定性指标，其平均相对标准偏差为1．54％，明显优于同迁移时间进行定性所得的平均相对标准偏差7．9％。提出用识别系数评价定性的可靠性。当使用相对有效淌度作定性指标时，75％以上的分析物都达到了可靠识别。识别可靠性与采用迁移时间相比最高可提高16倍。     

Parallel methods for verified global optimization practice and theory

We present a new parallel method for verified global optimization, using a centralized mediator for the dynamic load balancing. The new approach combines the advantages of two previous models, the master slave model and the processor farm. Numerical results show the efficiency of this new method. For a large number of problems at least linear speedup is reached. The efficiency of this new method is also confirmed by a comparison with other parallel methods for verified global optimization. A theoretical study proves that using the best-first strategy to choose the next box for subdivision, no real superlinear speedup may be expected concerning the number of iterations. Moreover, the potential of parallelization of methods of verified global optimization is discussed in general.     

Theory of GC2 — an unusual approach

In contrast to traditional theoretical approaches by calculation of (nonexistent) theoretical plates, a unified theory of gas chromatography as given by a definition of the resolution analogue to methods in signal processing or spectroscopy using the well-known Kovacz indices as fundamental scale. A derivation of the thusly defined resolution from basic physical principles yields very practical formulae for peak width, maximum load, substance flow in peak maximum, concentration of substance in the carrier gas and other interesting parameters in dependence of capillary diameter, capillary length, film thickness, carrier gas speed, viscosities etc. Diagrams show favourite conditions for detectors responding on absolute substance flow (e.g. FID) or on concentrations.     

Criterion for an EMG peak

Summary The criterion for an exponentially modified Gaussian (EMG) peak presented is based on the rule of the peak width for an EMG peak. An EMG peak can be judged by the agreement between the value of the peak width calculated from this rule and that measured from a real chromatographic peak.