Quantum-dots containing Fe/SBA-15 silica as “green” catalysts for the selective photocatalytic oxidation of alcohol (methanol,under visible light)

Fe/SBA-15 catalysts containing iron oxide nanoparticles confined inside silica pores (replicated, internal, poorly crystalline) and grown outside silica grains (external, mainly crystalline hematite) in different proportions are prepared using a single silica support. Fe-species are deposited by the two-solvent technique with two iron salts precursors (Fe(NO₃)₃·9H₂O, FeCl₃·6H₂O) and two solvents (cyclohexane, hexane) for 11 wt% of iron. Calcination is performed in reproducible conditions (700 °C, 2 °C/min, thin bed, in air). SAXS measurements are used to show that the 2D hexagonal structure of the used silica is maintained after Fe-loading and calcination. Ar sorption measurements show that the pores are partially plugged. The oxidation of pure methanol is used as a test reaction to compare photocatalytic properties. H₂O₂ and visible light both activate the reaction. More active catalysts are formed with hexane associated with FeCl₃·6H₂O than with Fe(NO₃)₃·9H₂O. A reversed situation is observed with cyclohexane. Iron leaching (after 1 h 30 of test, up to 3 mg of Fe by mL) is important. These results are expected to be of interest in the exploration of size and shape “nanocatalysis” and to provide a further understanding for the reactions that take place when porous silicas are used as supports.     

软构件技术在财务管理系统设计中的应用

在介绍构件技术的基础上,提出了基于可复用构件的财务管理系统的开发模型和体系结构,以此为基础,利用.NET平台进行财务构件开发,并对其中的关键技术AOP和ORM等作了分析与探讨,解决了在财务管理系统中如何应用软构件技术的问题。     

一种基于面向对象和方面的组合编程方式

首先分析了程序设计的发展，以及现代技术和经验在软件复用上所做的努力，提出一种新的结合OO和AO的编程方式的简单架构和基本实现．     

Struts2拦截器在软件开发中的应用

大数据高速发展的前提下,如何提高数据库的访问效率,减少数据库的访问开销,是当前非常有价值的探讨课题,文章针对传统数据库增删改查操作中存在的效率低下问题,运用Struts2拦截器设计了改进方案,并应用于实际项目中,通过测试验证方案真实可靠,有效地提高了数据库的访问效率,并为实际软件工程项目开发提供了一个有效的解决途径。     

Application of IATA – A case study in evaluating the global and local performance of a Bayesian network model for skin sensitization

The information characterizing key events in an Adverse Outcome Pathway (AOP) can be generated from in silico, in chemico, in vitro and in vivo approaches. Integration of this information and interpretation for decision making are known as integrated approaches to testing and assessment (IATA). One such IATA was published by Jaworska et al., which describes a Bayesian network model known as ITS-2. The current work evaluated the performance of ITS-2 using a stratified cross-validation approach. We also characterized the impact of replacing the most significant component of the network, output from the expert system TIMES-SS, with structural alert information from the OECD Toolbox and Toxtree. Lack of structural alerts or TIMES-SS predictions yielded a sensitization potential prediction of 79%. If the TIMES-SS prediction was replaced by a structural alert indicator, the network predictivity increased up to 87%. The original network’s predictivity was 89%. The local applicability domain of the original ITS-2 network was also evaluated using reaction mechanistic domains to understand what types of chemicals ITS-2 was able to make the best predictions for. We found that the original network was successful at predicting which chemicals would be sensitizers, but not at predicting their potency.     

一种基于AOP和UML的分布式仿真架构设计方法

面向方面编程(AOP)是一种新的编程方法,它关注的是系统中横切(Crosscut)了所有组件的关注点(Concern).将AOP和UML结合起来,用来解决分布式仿真中的架构设计和公用服务问题.该方法可以降低代码的冗余度,提高分布式仿真中联邦间公用服务的重用性,弥补OOP在解决横切问题上的不足.     

面向方面编程的研究

AOP为开发者提供了一种描述横切关注点的机制,它能够自动将横切关注点织入到面向对象的软件系统中,从而实现横切关注点的模块化.论述了AOP的产生、开发步骤和关键技术,对AOP的优缺点进行了比较分析.     

意向驱动的AOP语言AOPLID

描述一种基于情境演算的、意向驱动的ＡＯＰ语言－ＡＯＰＬＩＤ，并给出ＡＯＰＬＩＤ对追杀问题的程序设计实例。该语言克服了ＧＯＬＯＧ的缺点，能较好地处理动态变化领域的应用及反映多Ａｇｅｎｔ间的协作关系。     

Application of Photo-Fenton,Electro-Fenton,and Photo-Electro-Fenton processes for the treatment of DMSO and DMAC wastewaters

Biological treatment, due to the formation of hazardous chemicals to remove organic compounds such as dimethyl sulfoxide (DMSO) and N, N-dimethylacetamide (DMAC), has limited potential. Advanced oxidation processes (AOPs) are regarded as a viable alternative for treating molecules containing carbon-hydrogen bonds that cannot be broken down by traditional physico-chemical methods. In this investigation, various AOPs such as Photo-Fenton, Electro-Fenton, and Photo-Electro-Fenton processes were studied to treat wastewaters containing DMSO and DMAC. The effects of the operating parameters, including various initial concentrations of DMSO and DMAC, initial pH, reaction time, different concentrations of Fenton’s reagent, power of UV lamp, different concentrations of electrolytes, the distance between electrodes and current intensity, were investigated. The findings of the experiments revealed that a pH of 3 and a reaction time of 120 min were optimal. At 2000 mg L^?1 of DMSO, maximum degradation and the final concentration of TOC were 98.64 % and 256.8 mg L^?1, respectively, by the Electro-Fenton process under the optimal conditions. The Electro-Fenton process was successful in determining the maximum degradation of DMAC (96.31 %) and the final TOC concentration (10.03 mg L^?1) at 250 mg L^?1 of DMAC under optimal conditions. Finally, it can be concluded that the Electro-Fenton process was the best process for the efficient removal of DMSO and DMAC. The second step of the kinetic model follows a pseudo-first-order reaction for 250 and 500 mg L^?1 of pollutants and obeyed a pseudo-second-order kinetic model for concentrations of 1000, 2000 mg L^?1.     

一种基于AOP的软件演化策略设计与实现

软件演化通常需要向系统的各个模块中添加新的通用功能,一般是在每个有需求的模块中直接插入相应的功能代码,但这种做法工作量大、出错率高,同时容易破坏系统的结构.为此介绍了一种基于面向方面的编程(AOP)的软件演化策略,该策略通过使用关注点,向演化系统中注入新的代码,而不改变系统的结构.除此,还介绍了基于此方法的支持软件演化所实现的一个工具,并通过实例对该方法加以了验证和说明. 该方法只是应用了AOP的思想,因此不局限于支持AOP的程序设计语言,对于一般的面向对象的程序设计语言都适用.