The main objective of this research is to optimize the stock portfolio of investment companies operating in the field of petrochemical and refining industries through minimizing risk with respect to the expected return. In this regard, first of all, the compositions of sample firm's portfolios were investigated during 2013 to 2016 and high-weight industries were selected. Then, the risk of retu...

Ultrasonic Guided Wave inspection of pipes has been extensively used in various industries such as oil, gas and petrochemical industries. The behavior of guided waves in straight pipes is well known but the presence of features like pipe bends, welds may distort the receiving signals. It is therefore a challenging task to study the behavior of guided waves through these features. However, the 3...

Aromatic sulfones comprise a class of chemicals used in agrochemical and pharmaceutical industries and as floatation and extractant agents in petrochemical and metallurgy industries. In this study, new QSA(P)R studies were carried out to predict the toxicity against Vibrio fischeri of a set of 52 aromatic sulfones. The same approach was used to evaluate the relationship between these endpoint a...

This study explores the inter-relationships among economy, energy and CO2 emissions of 37 industrial sectors in Taiwan in order to provide insight regarding sustainable development policy making. Grey relation analysis was used to analyse the productivity, aggregate energy consumption, and the use of fuel mix (electricity, coal, oil and gas) in relation to CO2 emission changes. An innovative ev...

Abstract To increase the capacity and production of petroleum petrochemical industries, it is helpful to investigate features industry-university-research collaborative innovation networks. Using DEA model as a research object, listed companies in China’s industries are assessed for their output, Moreover, we examined structural holes Co-innovation network between industry university. We have a...

One of the most important challenges facing control system engineers is the design and implementation of next-generation control systems that can assist operators in making supervisory control decisions such as in abnormal events management (AEM), start up and shut down, controller performance assessment and so on. Operator failure to exercise the appropriate supervisory control decisions often...

We are indebted to Ralph Landau for sharing with us his vast knowledge of the chemical industry and the chemical engineering sector, and to Nathan Rosenberg for his insightful remarks and encouragement. We also thank the Technology and Economic Growth Program, CEPR, Stanford University, for financial support. Zhang Jianyu provided excellent research assistance. The usual disclaimers apply. This...