高效液相色谱指纹图谱结合聚类分析法对不同产地穿心莲药材的质量评价

建立了穿心莲药材的高效液相色谱（HPLC）指纹图谱,并对指纹图谱信息进行了数据化处理,为穿心莲药材的质量控制提供比较全面的评价方法。采用水浴回流法提取穿心莲药材中的主要成份,应用高效液相色谱分离-紫外检测法,选用Kromasil C₁₈色谱柱（250mm×4.6mm,5μm）,以含5%乙腈的甲醇溶液-0.1%磷酸溶液为流动相进行线性梯度洗脱,检测波长260nm,确定了20个共有峰,并对不同产地的10批穿心莲药材指纹图谱进行了相似度比较和聚类分析,初步评价了药材质量优劣。方法具有良好的稳定性和重现性,可有效用于穿心莲药材的质量控制。     

Multi-criteria decision-making methods based on intuitionistic fuzzy sets

In this paper we present new methods for solving multi-criteria decision-making problem in an intuitionistic fuzzy environment. First, we define an evaluation function for the decision-making problem to measure the degrees to which alternatives satisfy and do not satisfy the decision-maker’s requirement. Then, we introduce and discuss the concept of intuitionistic fuzzy point operators. By using the intuitionistic fuzzy point operators, we can reduce the degree of uncertainty of the elements in a universe corresponding to an intuitionistic fuzzy set. Furthermore, a series of new score functions are defined for multi-criteria decision-making problem based on the intuitionistic fuzzy point operators and the evaluation function and their effectiveness and advantage are illustrated by examples.     

运用ABC系统的先进制造系统经济评价模型

活动为基础的成本计算系统是一种更适应先进制造系统生产特征的成本会计创新模式。本文提出了一种运用ＡＢＣ系统的制造系统经济评价模型，并通过案例说明该模型不但能准确反映先进制造系统使用生产要素的有形成本，而且能充分反映机会成本等无形费用对评价结果的重要影响。     

试卷质量的灰色综合评判

李文革．试卷质量的灰色综合评判．数理统计与管理，１９９７，１６（４），４２～４５．本文运用灰色综合评判评价了文［１］中的七套试卷，得到了与文［１］不同的结果，但本文的结果更符合客观实际。     

Evaluation of Measurement Methods of Waxy Crude Oil Thixotropy

The thixotropy of three waxy crude oils was measured to evaluate different measurement methods using RheolabQC. The results showed that the average relative deviation using the hysteresis loop method was 24.4%, the lowest among the methods evaluated. The method of stepwise-increase in shear rate was able to obtain several rheological characteristics from a single experiment, and such a thixotropic experiment can be performed with any rheometer. This makes the stepwise-increase in shear rate the method of choice when considering convenience. However, the method of hysteresis loop is preferable when it comes to the reliability of measuring thixotropic parameters.     

Differential calculus on multiple products

This paper introduced the calculus of mappings on finite product of spaces, allowing different degrees of differentiability in the different factors. This enables us to prove an important feature in the infinite-dimensional Lie theory, the exponential law in generalized setting for locally convex spaces and for manifolds modelled on locally convex spaces.     

A Quantum Chemical Study of Bismuth Compounds Thermodynamic Properties and Configuration of Pentacoordinated Organobismuth Molecules

By the PM3 method, standard values of entropy, heats, and free energies of formation have been computed for a series of inorganic and organic bismuth compounds. Linear dependences P exper = b P theor (where P is any of the mentioned properties) have been stated, allowing a priori evaluation of thermodynamic characteristics of Bi-containing substances. A quantum chemical calculation reproduces well the adiabatic ionization potential of BiH 3 . Triphenyldichlorobismuth and triphenyldinitratobismuth existence in benzene solutions in the form of trigonal bipyramid with two axial chloro and nitrato ligands has been concluded.     

Novel evaluation method for degradation rate of polymer electrolytes in fuel cells

A simple and new method has been developed to evaluate the degradation rate of polymer electrolytes caused by the cross-leakage of H₂ or O₂ in PEFCs. Mixed gas of H₂ and air with a constant composition was supplied to a sample powder suspended in water, e.g., consisting of Pt supporting carbon black coated with a perfluorosulfonated acid electrolyte. Fluoride ion released from the electrolyte into the water was quantitatively analyzed as a function of time. The electrolyte was decomposed only when H₂, O₂, and Pt coexisted. The present method enables to compare the durability of different electrolyte polymers directly under the same controlled environment within a short period.     

一阶模糊谓词逻辑公式的区间解释真度理论

通过引进一阶模糊语言变元集赋值的新概念,给出了一阶模糊谓词逻辑(或一阶模糊语言)公式的区间解释真度的定义,并讨论了它们的一系列性质。