manufacture of coke, refined petroleum products and nuclear fuel is one of the isic (international standard industrial classification of all economic activities, rev.2) that produced 8.5 percent of industry value-added in iran in 2007. isfahan, tehran, khuzestan, hormozgan, and markazi provinces accounted for 90 percent of the value added in this sector. to determine competitive advantage in th...

in this paper, in order to optimize the portfolio consisting of selected industrial stocks of petroleum products, automobiles and parts, electrical industry and extraction of minerals from tehran stock exchange member, first, time – varying conditional covariance matrix has been estimated based on the following multivariate garch models: diagonal-vech (1,1), ccc (1,1) and diagonal -bekk (1,1). ...

Growing water scarcity is one of the central challenges for sustainability in China, given its burgeoning industry and huge population, especially in the arid and semi-arid inland river basin where precipitation is very limited. Industrial transformation is an important engine of economic growth, which is required to be implemented by governments at all levels in China. Economic models have gen...

heat exchangers are one of the most important devices of mechanical systems in modernsociety. most industrial processes involve the transfer of heat and more often they requirethe heat transfer process to be controlled. a heat exchanger is the heat exchanged betweentwo media, one being cold and the other being hot. there are different types of heatexchanger, but the type which is widely used in...

PID control systems have been widely employed in industrial processes. Recently, some data-oriented PID control systems have been proposed because it is difficult to adjust a set of suitable PID gains. In this paper, one of data-oriented PID control schemes, which is designed by using the generalized output errors, is proposed. The generalized output is defined from a PID control law. Moreover,...

Societies before the Industrial Revolution were dependent on the annual cycle of plant photosynthesis for both heat and mechanical energy. The quantity of energy available each year was therefore limited, and economic growth was necessarily constrained. In the Industrial Revolution, energy usage increased massively and output rose accordingly. The energy source continued to be plant photosynthe...

This paper presents an industrial case study of the performance evaluation of a multivariate MPC-based controller as implemented on a 6-output, 6-input industrial process with 6 measured disturbance variables that are used for feed forward control. The industrial unit is a Para-Xylene (PX) production process at Mitsuibishi’s petrochemical complex in Mizushima, Japan. A generalized predictive co...

As the production of biofuels continues to expand worldwide, criticism about, e.g. the energy output versus input and the competition with food has been questioned. However, biofuels may be optimized to increase the environmental performance through the concepts of industrial symbiosis. This paper offers a quantification of the environmental performance of industrial symbiosis in the biofuel in...

The paper introduces a semantic algorithm for building Industrial Symbiosis networks. Built around ontology modelling of knowledge in the domain of Industrial Symbiosis, the algorithm enables the acquisition of the explicit knowledge from the user through ontology instantiation and input/output matching based on semantic relevance between the particip...

The article examines whether firms benefit from the presence of universities when developing technology. By estimating regional knowledge production functions for 101 Italian regions, we observe a strong positive relation between industrial technological performance – measured by patents – and the local presence of universities. In addition, ‘academic’ regions witness higher levels of industria...