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Abstract: Using the grey relational analysis theory, this exploratory study was to find the principal factors of Quality of Service of Web Sevice and its contributions. The paper utilized a real Quality of Web Service data sets:QWS Dataset (1.0) to grey relational analysis. The results indicate: (1) the sequence of influencing factors of Web Service selection is Best Practices, Compliance, Availability, Successability, Reliability, Latency, Response Time, Throughput, Documentation; (2) nine factors can be classified into four kinds: the first important factors are Best Practices, Compliance, and Availability; the second important factors are Successability, Reliability; the third important kind factors are Latency, Response Time; the less important factors are Throughput, Documentation; (3) the percent contributions of four kinds factors to the QoS of Web Service is 36.68%, 22.96%, 20.6%, 19.77%. [Copyright &y& Elsevier]

Different morphologies of Cu 2 O materials were synthesized with a simple one-pot reaction by adding reductant into a Benedict mixing solution containing copper sulfate, sodium carbonate, and sodium citrate. Effects of reducing agent, dispersant, and temperature on material structures were investigated. Novel ‘balsam pear’ rod and star shapes of Cu 2 O were obtained at a reaction temperature of 70 °C when glucose was used as a reductant. The cubic shape of Cu 2 O was prepared at 25 °C with ascorbic acid as a reductant. Moreover, the size of the cube increased and the crystal faces sharpened when the temperature increased. The products were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The results showed uniform morphology of Cu 2 O in each condition. The synthesis method is simple, environmentally-friendly, and highly repeatable. [ABSTRACT FROM AUTHOR]

Abstract: The separation of a hydrogen isotope mixture on porous materials was studied using equilibrium and breakthrough experiments. The adsorption equilibria of H2 and D2 on SBA-15 with mesopores and molecular sieves 5A, Y, and 10X with micropores were measured at 77 K using the volumetric method. The breakthrough experiments of a H2 and D2 mixture in each adsorbent bed were carried out at various conditions of flow rate and pressure. The equilibrium ratio of D2 to H2 on mesoporous molecular sieves was larger than the ratio on microporous molecular sieves (SBA-15 > 10X > Y > 5A), but the difference among the adsorbents decreased with increases in pressure. On the other hand, the order of breakthrough separation factor showed the opposite result (SBA-15 < 10X < Y < 5A). The breakthrough separation factors for zeolite 10X was approximately equal to the equilibrium ratio of D2 to H2 at the corresponding partial pressures, whereas zeolites 5A and Y showed higher breakthrough separation factors than their equilibrium ratios. In SBA-15, the separation factors from breakthrough results were even smaller than the corresponding equilibrium ratio. In the microporous adsorbent with a limited pore size (zeolite 5A in the study), the diffusion mechanism contributed to the separation of hydrogen isotope gases as one of key factors. [Copyright &y& Elsevier]