A comparative quantum-chemical analysis of electronic structures and spectroscopic parameters of cycloalkanes and cyclopolysilanes

A comparative quantum-chemical analysis of the electronic structures and spectroscopic parameters of the cycloalkanes C₃H₆, C₄H₈, C₅H₁₀, and C₆H₁₂ and their silicon analogs Si₃H₆, Si₄H₈, Si₅H₁₀ and Si₆H₁₂ was performed in the framework of the SCF MO LCAO method in the INDO approximation. Qualitative interpretation of “abnormal” ionization potentials and energies of electronic absorption spectra of cyclopolysilanes has been given. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1105–1108, June, 1997.     

KCl-LiCl-H2O体系热力学性质的研究

用K-ISE、Li-ISE和Cl-ISE测定了25 ℃时体系中KCl、LiCl的平均活度系数, 溶液的离子强度从0.1～4.0 mol·kg~(-1), 组成范围从纯的KCl到纯的LiCl。将Pitzer方程应用于测定结果, 用多元线性回归方法求出了Pitzer参数。     

南华大学图书馆的津贴分配细则及其激励作用

阐述了南华大学图书馆在岗位津贴分配上遵循的指导思想和基本原则,介绍了岗位津贴档次的设置及其评定方法,指出细则的实施激发了工作人员的潜能,加强了工作人员的竞争意识,营造了学术氛围,盘活了人力资源,充分调动了工作人员的积极性。     

盲孔套筒零件的加工

介绍了从零件结构特点、加工精度来合理选择夹具、切削用量、刀具几何参数，以保证零件加工质量的工艺分析方法。     

企业税务策划与税收优惠政策研究

税收优惠无疑为企业等经济实体节约了成本费用,保留了收益,但并不是"免费的午餐",若不谨慎对待,则很可能要为此付出沉重的买单。基于这个认识,本文遵循理论研究与案例研究相结合的方法,对税收优惠冲突的根源进行分析,以期为税务策划实践活动提供有益的启示。     

我国的能源消费和二氧化碳排出

为了寻求CO2排出削减和途径，作为探讨其排出机制的第一步，本文分部门地推算了我国从1980年到1996年的各种能源消费所引起的CO2排出量，结果表明，我国CO2排出的总量一直呈增加趋势。在分部门的CO2排出量中产业部门为最多，但增长率则是以能源转换部门为最快，在各类能源的CO2排出量中，煤炭起因的排出占绝大部分。     

立方氮化硼铰刀在加工钻体孔上的应用

为了开拓立方氮化硼铰刀的加工范围,本文提出了一种新的孔机械加工工艺方案,用以加工扳手钻夹头钴休孔(三斜孔),分析了现行工艺存在的问题,论述了研制出的一种用于孔类精加工的大铰削量立方氮化硼铰刀,其中包括这种铰刀的设计、使用以及铰削质量和技术经济分析。     

On the relations among best approximation and Fourier coeffcients

We discuss the relations among the best approximation En(f) and the Fourier coeffcients of a function, f(n) ∈ C,n = 0,±1,±2,..., under the conditions that {f (n)}∞n=0 ∈ MVBVS* and {f (n) f(n)}∞n=0 ∈ MVBVS*, where MVBVS* is the class of the so-called Strong Mean Value Bounded Variation Sequences.     

Study of Un-added Allowance of Draping-Planar Designing Garment Prototype for Young Ladies

As for the theory and method in garment structural design according to human figures,a principle for garment design,i.e.body-fitting without added allowance,and a combination of draping and planar design (DPD hereunder) for young ladies has been put forward,and,also,a DPD garment prototype for them has been established.And the applied formulae for extensively-practicing operation have been set up,which proves to be,with actual samples,a systematic and practical garment structural designing theory and approach.