A typical Iranian carbonate matrix block surrounded by an open fracture was modeled in order to understand the fracture-matrix interaction and realize how to model the interaction best. The modeling was carried out by using a fine-scaled Eclipse model in the single porosity mode (the fractures were explicitly modeled). The model was extended to a stack of 6 matrix blocks to understand block-to-...

A hydraulic excavator (HE) is a typical piece of construction equipment and widely used in various fields. However, the poor energy efficiency HEs results serious waste has aroused attention researchers. Furthermore, rising fuel prices increasing stringent gas emission legislation sparked demand for ways to improve efficiency. Recovering otherwise wasted boom potential conventional HE by proper...

ESES/XKRS(XML-bases Key-Recovery System), which will be introduced in this paper, is a subsystem of ESES(ETRI Secure E-commerce Service) that has been implemented to support security services such as authentication, integrity, confidentiality and key-recovery. ESES/XKRS is a key-recovery system for B2B electronic commerce and its recovery method is key-escrow. It has been designed and been impl...

Service recovery technology is an important constituent part of the emergency response technologies. The service recovery goal is to build a technology system of service recovery focusing on the survival of information system services. By analyzing the relationship between service and data, we present a service recovery mechanism by recovering service’s data. We introduce a third party service ...

in a novel dual bed reactor fischer-tropsch synthesis was studied by using two diffrent cobalt catalysts. an alkali-promoted cobalt catalyst was used in the first bed of a fixed-bed reactor followed by a rutenuim promoted cobalt catalyst in the second bed. the activity, product selectivity and accelerated deactivation of the system were assessed and compared with a conventional single bed react...