After comparing the sensitizing effect of various mixed surfactants on the chromophoric reaction of gallium （Ⅱ） with orthochlorophenylf luorone, it has been found that the mixed micelle of cetyltrimethylammonium bromide and Tween-80 is most suitable. In the presence of this mixed micelle, not only both the sensitivity and stability improve markedly, but also a wider pH range is tolerable for the colour-development. From the study on the optimum conditions for the formation of the coloured coordination compoundin the system of 《Ga （Ⅱ）——o-Chlorophenyl fluorone-catyltrimethylammo-nium bromide——Tween-80》 and its main characters, a spectrophotometricmethod, by which sensitivity and reproducibility are higher than those of ternary systems of gallium（Ⅱ） has been developed. When it is combined with the dual-wavelength method, the molar absorptivity can be improved to 2.33×105 l·mol-1·cm-1,which is higher than that of most of other systems ever sh

The Present work has found that the transverse rupture strength of WC-Co hardmetals can be improved by queuching heat treatment. The increment of transverse rupture strength （ΔTRS） was dependent on the cobalt content of hardmetal. The higher the cobalt content of hardmetal is, the more the increment of transverse rupture strength is. The main reason is that the transformation of face centered cubic cobalt stabilized at high temperature to hexagonal close packed cobalt can be depressed by quenching. The transformation temperature of hexagonal close packed cobalt binder phase was determined by differential thermal analysis. It was found that the transformation temperature increases with increase of cobalt content of hardmetal. The reason is that the cobalt binder phase of high cobalt hardmetal contains higher tungsten content than that of low cobalt hardmetal after quenching

Using sand moulds for step-shape casting tests and different silicon percentage of nodular cast iron it was possible to separate structural variations produced during freezing from those occurring at Ac1 transformation temperature. The results show that an increase in silicon content leading to different variation in the matrix structure> leads to a changing mechanical properties of nodular cast irons. Tensile strength and elongation of obtained as-cast nodular cast iron with the composition of 3.9%C, 3.2%Si, 0.5%Mn are maximum of about 524.5N/mm2 and 19.8% accordingly. In the same nodular cast iron, but only with 0.1% Mn the silicon addition first increases after decreases elongation, impact toughness and hardness. But tensile strength changes to the opposite side

Two tendencies often occur in the process of translation. One is going after smooth reading and beautiful language at the expense of the true meaning of the original, the other is rigidly sticking to the original words, and the translation turns out to be obscure [ əb'skjuə ] 难解的,含糊的and hard to understand

Data Hazards ◼ Instruction having register R as source follows shortly after instruction having register R as destination ◼ Common condition, don’t want to slow down pipeline Control Hazards ◼ Mispredict conditional branch ⚫ Our design predicts all branches as being taken ⚫ Naïve pipeline executes two extra instructions ◼ Getting return address for ret instruction ⚫ PIPE- executes three extra instructions Making Sure It Really Works ◼ What if multiple special cases happen simultaneously?

复旦大学：《电动力学》学生课堂报告_Polarization of EM wave after reflection

复旦大学：《材料失效分析 Materials Failure Analysis》课程教学资源（教学案例）52. Damage and residual life assessment of bends for X20CrMoV12.1 main steam pipe after long term service

1. Genetic Counselors 2. Who Should See One 3. What to Expect During a Visit 4. After Counseling

《复合材料 Composites》课程教学资源（学习资料）第二章 增强体_glass fiber-4 Tensile behaviors of ECR-glass and high strength glass fibers after NaOH treatment

如何面对死亡 Facing Death And The Life After（葛培理）