自旋因式化法推求同科电子组态原子光谱项

以同科电子i3组态光谱项推求为例,提出了用自旋因式化方法推求同科电子光谱项的一般方法.该法较为简单、适用,易于推广,可求出任一基态或激发态原子或离子光谱项.     

Alphabetical index of defined terms and where they can be found¶Part II: G–Q

 This paper, the second of a series of three, presents the second part of an alphabetical index of approximately 1400 terms taken from various international official standards, protocols and guides. The terms listed are those encountered in the analytical sector, related to sampling, quality, conformity assessment, standardisation, measurement and related statistics. The definitions themselves are not included. The purpose of the index is to provide the user with a ready means of establishing whether a particular term has an official definition and if so where it is located. In doing so it makes location of officially defined terms more straightforward and so encourages their use. It also highlights those terms which are defined in several places, indicating the degree of equivalence between the definitions from the different sources. This second part of the index covers G–Q.     

Exact Riemann Solution and Weighted Average Flux Method for Power-law Channel Section

The aim of this work is to extend the Weighted Averaged Flux (WAF) method by E.F. Toro from rectangular to generic regular cross sections, in order to represent the geometric effects of the cross-section on wave propagation along channels. Assuming a power-law variation of the channel width, the 1D conservative shallow water equations, their characteristic form and the shock propagation equations are presented. The exact Riemann solver is derived and is applied to the dam-break problem in valleys with different shape in order to test its efficiency and to check the accuracy order of solutions obtained by approximating the real cross-section with an equivalent rectangle. The WAF method is extended to a power-law channel section and is used to solve the 1D proposed equations taking into account all the source terms that are incorporated into the local Riemann problem. A code based on this method has been developed and results of numerical applications to a Venturi channel and to the attenuation of waves are presented, in order to verify, for well known situations, how accurately the source terms are represented. The code is applied to reproduce one of Brock's experiments (1969; 1970) on roll waves generation in a rectangular channel and results are compared with those obtained with a Godunov-type code developed at CEMAGREF, which is based on a Roe scheme with a later average evaluation of source terms.     

SDOWN: A Novel Algorithm and Comparative Performance Analysis of Underlying Infrastructure in Software Defined Heterogeneous Network

In this article, a comparative performance analysis of three (03) different algorithms operating in the control plane of the three (03) varied architectures such as Physically Distributed, Logically Distributed, and Physically Centralized Architecture has been done. The paper also elucidates the working and implementation of the three proposed architectures with suitable block diagram of system model. Besides, in these architecture models OpenFlow (OF) governed various MATLAB components have been designed such as Application Controller, Optical Transport Network Controller, SDOWN Controller, Ethernet switch-1 and 2, ROADM and Wi-Fi access point with suitable interfaces. Pseudo codes of the algorithms operating in above said MATLAB components are duly explained with flowcharts. Mathematical analysis of three different architecture in respect of latency is carried out, and results and discussions with suitable figures have also been represented. The results obtained show that out of three (03) aforesaid architectures the Physical Centralized Architecture has better performance upto 45 Km in terms of Q-factor, SNR, BER, Jitter and Latency.     

应用Matlab推求等效电子的光谱项

阐述了用Matlab的函数推求等效电子LS耦合的光谱项的方法,具体推求了3个等效d电子和6个等效f电子组态的光谱项。     

Alphabetical index of defined terms and where they can be found Part I: A–F

 This paper, the first of a series of three, presents the first part of an alphabetical index of approximately 1400 terms taken from various international official standards, protocols and guides. The terms listed include those encountered in the analytical sector, related to sampling, quality, conformity assessment, standardisation, measurement and related statistics. The definitions themselves are not included. The purpose of the index is to provide the user with a ready means of establishing whether a particular term has an official definition and if so where it is located. In doing so it makes location of officially defined terms more straightforward and so encourages their use. It also highlights those terms which are defined in several places, indicating the degree of equivalence between the definitions from the different sources. This first part of the index covers A–F and additionally lists terms regularly encountered but thought to have no officially recognised definition.     

自旋因式化法推求等价组态j—j耦合原子光谱项

本文提出了推求等价组态ｊ－ｊ耦合原子光谱项的新方法－自旋因式化法，该法计算过程简单，易于掌握。     

微扰论与平均Hamiltonian理论Ⅰ.场相关化学位移

本文应用平均Hamiltonian理论讨论了异核偶极相互作用引起的场相关化学位移,对照二阶微拢论的结果,发现计入了"A"项的额外影响。说明在讨论非久期项效应时,一级平均Hamiltonian比只用二阶微扰论的结果更精确。文中,应用平均Hamiltonian理论还讨论了同核偶极相互作用产生的场相关化学位移。     

氢氮氧氟氯译名的创制与厘定

“氢、氮、氧、氟、氯”是现代化学中十分重要的元素,但是这些名词的创制与传播过程一直不太明晰。本文研究发现,“氢、氟、氯”1908年由中国化学会欧洲支会首创,其成果被1909年设立的编订名词馆吸收,并创制了“氮、氧”。这些译名在创制之初未能产生重要影响,1920年后才在郑贞文与商务印书馆的大力支持下被广泛使用,并最终在1932年的教育部化学讨论会上被确定下来,为化学界所接受。     

Alphabetical index of defined terms and where they can be found Part III: R–Z

 This paper, the third of a series of three, presents the final part of an alphabetical index of approximately 1400 terms taken from various international official standards, protocols and guides. The terms listed are those encountered in the analytical sector, related to sampling, quality, conformity assessment, standardisation, measurement and related statistics. The definitions themselves are not included. The purpose of the index is to provide the user with a ready means of establishing whether a particular term has an official definition and if so where it is located. In doing so it makes location of officially defined terms more straightforward and so encourages their use. It also highlights those terms which are defined in several places, indicating the degree of equivalence between the definitions from the different sources. This third part of the index covers R–Z.