工业污泥中铜含量的不同测定方法对比

采用火焰原子吸收分光光度法（AAS）和快速碘量法对工业污泥中铜含量进行测定,并对结果做了对比分析.结果表明两种方法的准确性和可操作性均较好,回收率在91.0%~99.0%之间,相对标准偏差均低于7%.碘量法分析简单,结果准确可靠,但不适合分析大批量的样品.火焰原子吸收分光光度法分析速度较快,灵敏度高,可以同时进行大批量的样品分析.     

Bridging the Gap between Industrial and Well‐Defined Supported Catalysts

Many industrial catalysts contain isolated metal sites on the surface of oxide supports. Although such catalysts have been used in a broad range of processes for more than 40 years, there is often a very limited understanding about the structure of the catalytically active sites. This Review discusses how surface organometallic chemistry (SOMC) engineers surface sites with well‐defined structures and provides insight into the nature of the active sites of industrial catalysts; the Review focuses in particular on olefin production and conversion processes.     

炼钢电弧炉STD微机控制系统

介绍了ＳＴＤ工业控制机在炼钢电弧炉控制中的应用。讨论了系统的控制原理，硬、软件组成及在环境恶劣现场的抗干扰问题。     

竞争力研究的新视角:动力学理论分析框架

突破基于指标体系评估的静态分析模式,提出了竞争力研究的新视角,建立动力学理论分析框架.提出了竞争力场模型,包括竞争强度、竞争势、要素密度、要素极化等定义及其表达方式,并创建竞争场能、竞争场信息熵的概念和数学模型.给出了竞争场的高斯定理与环路定理,并证明了竞争场信息熵的凸性定理及其极大熵原理.最后指出了竞争力的动力学理论研究的进一步发展方向.     

Present Status of Industrial Application of Cyclodextrins in Japan

The application of CDs in the food, cosmetic and textile industrial fields as solubilizing agents, stabilizers, emulsifiers etc., is reviewed briefly. ManyCD-containing commodities that have been put to practical use are introduced. Technical developments of CDs and their commercialization have had a multilateral impact on economic activities in our country. The expansiveeffects of CD production on other industrial fields and the economic impactare discussed.     

Voltammetric Ultra Trace Determination of Tellurium

Abstract

A simple and convenient method is described for the determination of low concentration tellurium based on differential pulse polarographic reduction of Te(IV) in alkaline medium. Linearity of the calibration curve was achieved up to 25.5 ppm with a limit of determination of 0.02 µg/mL. The possible interference of coexisting metal ions was examined and ruled out. The method has been successfully applied for the analysis of tellurium in industrial waste samples.     

A new multicriteria approach for the analysis of efficiency in the Spanish olive oil sector by modelling decision maker preferences

The efficiency in production is often analysed as technical efficiency using the production frontier function. Efficiency scores are usually based on distance computations to the frontier in an m + s-dimensional space, where m inputs produce s outputs. In addition, efficiency improvements consider the total consumption of each input. However, in many cases, the “consumption” of each input can be divided into input-consumption sections (ICSs), and trade-off among the ICSs is possible. This share framework can be used for computing efficiency. This analysis provides information about both the total optimal consumption of each input, as does data envelopment analysis, and the most efficient allocation of the “consumption” among the ICSs. This paper studies technical efficiency using this approach and applies it to the olive oil sector in Andalusia (Spain). A non-parametrical methodology is presented, and an input-oriented Multi-Criteria Linear Programming model (MLP) is proposed. The analysis is developed at global, input and ICSs levels, defining the extent of satisfaction achieved at all these levels for each company, in accordance with their own preferences. The companies’ preferences are modelled with their utility function and their set of weights. MLP offers more detailed information to assist decision makers than other models previously proposed in the literature. In addition to this application, it is concluded that there is room for improvement in the olive oil sector, particularly in the management of the skilled labour. Additionally, the solutions with two opposite scenarios indicate that the model is suitable for the intended decision making process.     

Two different routes to complex dynamics in an heterogeneous triopoly game

We study a triopoly game with heterogeneous players. The market is characterized by a nonlinear (isoelastic) demand function and three competitors. The main novelty is the double route to complex dynamics that we find and is quite rare in heterogeneous triopoly models. We show that the two routes have important implications for the economic interpretation of the dynamics emerging when the Cournot–Nash equilibrium becomes locally unstable. Moreover the model displays multistability of different attractors, requiring a global analysis of the dynamical system.     

基于钻石模型的广西与东盟国际贸易竞争力实证分析

随着中国-东盟自由贸易区和广西北部湾经济区的建立,使广西与东盟各国的经贸关系日益密切.通过统计分析和计量分析,借鉴波特"钻石模型"对广西与东盟国际贸易竞争力进行分析探讨,从而提出相关的建议.     

Development of an up-flow irradiation device for electron beam wastewater treatment

Electron beam irradiation processing is an available technology to treat sludge, groundwater, surface water and industrial and municipal wastewater. The use of this technology into environmental areas has moved slowly because industry and government are always conservative in the adoption of new processes, especially when they can not observe the efficiency and cost effectiveness of a treatment in a full scale facility.

In this direction the hydraulic system where the water is presented to the electron beam governs the efficacy of this technology. The present work is based on the development of the irradiation device, an up-flow delivery system that alleviates the dependence of energy transfer to the stream with the beam accelerating voltage (penetration capability).

In this work a series of experiments were performed to establish the relationships between accelerating voltage ranging from 0.5 to 1.5 MeV, current, water flow and deposited dose in order to optimize the operating parameters and the selection of a cost-effective commercial electron beam.