光电仪器结构设计中的经济性研究

针对光电仪器行业对降低光电仪器成本日趋渐高的呼声,提出了运用价值工程理论对光电仪器结构设计中的经济性进行研究的思路。从产品结构设计成本、材料成本、产品制造成本、生产周期这四个方面对光电仪器结构设计中的经济性进行了分析研究。研究结果表明,光电仪器结构设计经济性分析有助降低光电仪器产品的生产成本、缩短生产周期、提升产品价值,从而获得较好的社会效益和经济效益。     

一类误差不独立的变量含误差模型

对一类不独立变量含误差模型进行了探讨,建立了相应的模型,用极大似然方法给出了参数的估计;考虑了此模型的实例应用,并从相对偏差上将独立变量含误差模型与不独立变量含误差模型的结果进行比较,揭示了不独立EIV模型的先进性与较好的预测精度.     

Calculation of triaxial superdeformation in <Superscript>174</Superscript>Hf

A two-dimensional Total Routhian Surface (TRS) calculation with the fixed hexadecapole deformation ε4 = 0.03 was carried out for several configurations of 174Hf. Results indicate that the shell corrections have an important contribution to the formation of triaxial superdeformation in 174Hf and some possible configuration assignments are made to the 4 TSD bands experimentally found in 174Hf.     

仪器设备维修服务运行体系的设计

介绍了“以校园网络为依托,以实现报修过程的便捷化、维修过程的高效化、维修管理的科学化为出发点,以实现仪器设备维修服务运行体系向网络延伸为展开点,以为现有实验资源效用最大化的实现提供保障为目标点”所设计的仪器设备维修服务运行体系所涉及的系统设计思想、架构组成、相关版块的功能及实现方法。     

采油及炼油厂废水的可生化性研究

采用BOD5/CODCr法和瓦勃呼吸仪分别对炼油废水、聚合物驱采油废水和高含盐采油废水的可生化性进行了分析评价.结果表明:炼油废水和聚合物驱采油废水具有可生化性,而高含盐采油废水可生化性极差.在两种评价方法中,BOD5/CODCr法方法简单,易于操作,但可靠性差;瓦勃呼吸仪法通过测定微生物的呼吸曲线,能更加准确地反映废水的可生化性,为废水能否采用生物处理提供了一定的实验依据.     

Experimental vapor pressures of 1,2-bis(dimethylamino)ethane, 1-methylmorpholine, 1,2-bis(2-aminoethoxy)ethane and N-benzylethanolamine between 273.18 and 364.97 K

In this work, the experimental vapor pressures of four amines 1,2-bis(dimethylamino)ethane, 1-methylmorpholine, 1,2-bis(2-aminoethoxy)ethane and N-benzylethanolamine using a static apparatus are reported. The temperature range is comprised between 273.18 and 364.97 K and the pressure range between 0.782 Pa and 333 kPa. The molar enthalpies of vaporization at 298.15 K were calculated from Clausius–Clapeyron equation fitted on the experimental results.     

"泥泥狗"作为文化符号和审美元素的解读

从"泥泥狗"造型、色彩和纹饰特点等方面分析了被称为华夏文明的"活化石"、"真图腾"的"泥泥狗",认为其不仅具有独特的文化美,而且还是远古人类繁衍崇拜的物化和象征.     

提高智能工频多功能电表精度的方法

针对多功能电表测量电压、电流、功率的要求，研究了提高精度的方法，并设计了相关电路。     

Periodic orbits around the collinear libration points in the restricted three body problem when the smaller primary is a triaxial rigid body and bigger primary is a source of radiation pressure

Periodic orbits belonging to the stromgren families A, B and C around the collinear libration points in the restricted three body problem have been studied when the smaller primary is a triaxial rigid body and more massive body is a source of radiation pressure. These families are determined in three different cases: (i) classical case, (ii) when bigger primary is a source of radiation pressure, (iii) when smaller primary is a triaxial rigid body and bigger primary is a source of radiation pressure. The Liapunov stability of each periodic solution has also been examined.      

Elaborate treatment of retention in chemoselective chromatography—The retention increment approach and non-linear effects

The retention increment approach is described which quantifies the association equilibria of a selectand and a selector in complexation and inclusion chromatography. A thermodynamic treatment of enantioselectivity based on retention phenomena in chromatography including entropy/enthalpy compensation and the isoenantioselective temperature is advanced. Kinetic parameters of enantiomerization are discussed. Non-linear effects, both existent and elusive, are described and proposed, respectively. The enantioselectivity pertaining to catalysis vs. chromatography is compared and a unified nomenclature is proposed. Through an educational effort, this account is aimed at providing a deeper insight into chemoselective aspects of chromatography thereby stimulating further research of both established and speculative phenomena of the most intriguing manifestation of chemoselectivity, that is, of enantioselectivity.