首饰无氰仿金电镀的研究

论述首饰的无毒仿金电镀工艺，研究了镀层磨损的铜基体旧首饰镀前处理、预镀镍、酸性光亮镀铜、光亮镀镍及Cu—Zn—Sn三元合金仿金电镀工艺．并对影响镀件色泽的主要因素(镀液成份、操作条件等)进行实验探讨，找出较好的工艺条件。     

稀土铕(Ⅲ)三元络合物的合成和光谱性能研究

以三氟乙酸、噻吩、苯乙酮为原料经过酯化、乙酰化和缩合反应合成了噻吩甲酰三氟丙酮和苯甲酰三氟丙酮,并以它们为配体,合成了四个铕(Ⅲ)的三元络合物,通过元素分析表征了它们的结构.这些化合物在紫外光的激发下,固态和溶液都能产生强烈的红色荧光.给出它们的红外、紫外和荧光光谱数据,讨论了它们的配位络合性能和荧光性能.     

NH3-H2O-LiBr三元溶液体系气液相平衡特性实验研究

采用静态平衡釜对NH3-H2O-LiBr三元混合溶液的平衡压力及平衡温度进行了实验研究,以考察加LiBr添加剂对氨水吸收式制冷系统的影响.该三元混合溶液的压力-温度特性气液平衡实验在10个温度下进行,测试温度范围20～90℃,压力最高达2 MPa,LiBr质量分数取0.05～0.60.实验结果表明,与相同浓度下的NH3-H2O溶液相比,三元溶液的气液平衡压力降低了近30%～50%.由理论分析可推断其气相中的水含量亦有大幅度的降低.     

基于Dirchlet分布的扩展主观逻辑

针对基于二值逻辑的主观逻辑中存在的一些问题,提出了基于Dirichlet分布的扩展主观逻辑．在利用三值逻辑代替原来二值逻辑的基础上,扩展主观逻辑重新定义了事实空间与观念空间之间的映射关系和映射函数,并给出了新的扩展合意规则．扩展主观逻辑保留了主观逻辑基于统计推断和概率理论的优点,并考虑了事件结果不确定时的情况,从而可更好地建模和处理信任中的主观性和不确定性．实例分析表明,扩展主观逻辑具有合理的事实根据和理论基础．     

水-二异丙醚-异辛烷混合物在不同温度下的液液相平衡

为了解二异丙醚和汽油中主要成分烃类化合物的兼溶性能,以及二异丙醚的添加对烃类化合物与水相互溶解性的影响,测定了常压下,水-二异丙醚-异辛烷三元体系在298.15 K和308.15 K温度下的液液相平衡数据,并且用mod ified UNIQUAC模型对所测体系进行了计算.结果为:能准确的用含二元、三元相互作用参数的模型来关联这个三元体系;并且关联的结果要比预测结果好,与实验数据更吻合.     

对称三进制加减运算的进位分析

本文介绍了对称三进制加(减)运算的算法。重点分析了加(减)运算中的进位传输的条件和时间。     

Fusion of multiagent preference orderings with information on agent''''s importance being incomplete certain

The problem of fusing multiagent preference orderings, with information on agent's importance being incomplete certain with respect to a set of possible courses of action, is described. The approach is developed for dealing with the fusion problem described in the following sections and requires that each agent provides a preference ordering over the different alternatives completely independent of the other agents, and the information on agent's importance is incomplete certain. In this approach, the ternary comparison matrix of the alternatives is constructed, the eigenvector associated with the maximum eigenvalue of the ternary comparison matrix is attained so as to normalize priority vector of the alternatives. The interval number of the alternatives is then obtained by solving two sorts of linear programming problems. By comparing the interval numbers of the alternatives, the ranking of alternatives can be generated. Finally, some examples are given to show the feasibility and effectiveness of the method.     

三元均相恒沸精馏多定态分析

研究三元均相恒沸精馏多定态现象,进行含有多个精馏区域的三角形相图的多定态分析.在全回流/具有无限多块塔板(∞/∞)的条件下,分析各个精馏区域存在多定态现象的可能性,得出存在多定态现象的两个条件和进料组成区域.在一个具有25块理论塔板数的填料塔精馏装置中,对丙酮-正庚烷-苯001类三元物系,进行连续精馏多定态实验研究,结果表现出一定程度的多定态现象.     

四氯化碳--乙醇--氯化钙体系汽液平衡

实验测定了在８５．３ｋＰａ压力下四氯化碳－乙醇及其溶有不同浓度氯化钙体系的汽液平衡数据,以Ｆｕｒｔｅｒ拟二元体系模型处理溶盐三元体系,用Ｈｅｒｉｎｇｔｏｎ方法对无盐体系进行了热力学检验,并用ｖａｎ Ｌａａｒ方程关联了无盐及溶盐体系,得到了较好的效果。     

Syntheses, crystal structure and magnetic properties of Rm+nCo5m+3nB2n

The phase relations at the 600℃ and 700℃ isothermal sections of the ternary systems R-Co-B for R= Nd, Pr and R = Sm, Gd respectively were summarized in this paper. For Rm+ n Co5m+3n B2n, two new types ofcompounds R3Co13B2(R=Pr, Nd, Sm, Gd, Dy, Ho, Er, Y) (m=2, n=1) andR5Co19B6(R=Pr, Nd) (m=2,n = 3 ) were synthesized by utilizing the principle of structural combination. Their crystalstructures and easymagnetization direction were determined by X-ray powder diffraction, and structures were refined by the Rietveldmethod. The Curie temperature Tc, saturation magnetization M8 and anisotropic field HA of the new compounds weremeasured using a vibrating-sample magnetometer, an extraction sample magnetometer and M(H) - H curves of samplesin different magnetization directions respectively. The Tc and Ms of Rm + n Co5 m + 3 n B2n increase with increasing values of mat a given n value. HA increases with an increase in n when m is kept invariable. The effects of the substitution of Ni for Co on the magnetic properties of Nd13 Co15- x Nix B2 were also investigated. It was found that TsR decreased monotonously as the concentration of Ni increased, and at x = 3 the easy magnetization direction becomes axial at room temperature. The relations between crystal structure and magnetic properties of Rm + nCo5m+ 3nB2n and the possible routes of synthesizing permanent magnetic materials are also discussed.