earlier studies have shown conclusively that a tuned liquid damper (tld) is effective for controlling vibrations in structures subjected to narrow-banded wind excitations. a recent numerical study has shown that if the design parameters of a tld are properly set, this device could also be very effective for controlling structural vibration to broad-banded earthquake excitations. here the result...

Abstract The COVID-19 crisis has revealed and exacerbated a shortage of mechanical ventilators in hospitals around the world, regardless their government’s resources. Where some countries can respond to situation by ordering more high-end ventilators, price is often too high for low- middle-income (LMICs) securing them be difficult. goal this work design, prototype, test low-cost ventilator, ca...

Inventory or material balance control is an important part of process control. In the literature, many rules have been proposed to held in designing such systems, but their justification is often unclear. The main contribution of this paper is to proposed the more general selfconsistency rule for evaluating inventory control systems. Consistency means that the steadystate mass balances (total, ...

Flaring emissions during abnormal operating conditions such as plant start-ups, shut-downs, and upsets in chemical process industries (CPI) are usually significant. Flare minimization can help to save raw material and energy for CPI plants, and to improve local environmental sustainability. In this paper, a systematic methodology based on plant-wide dynamic simulation is presented for CPI plant...

Although many attempts have been made in presenting systematic models for design processes, most projects have been implemented by non-systematic methods, which seems that too much emphasis on the description of the final project (product) and the lack of attention to the design process are to be blamed for this. In this paper, a specific pattern of design scenario formation in the framework of...

Improving the operation is an attractive option for the process industry to deal with increased competition. In this paper a general dynamic optimization framework is proposed that aims to improve plantwide operation in an economic sense. The term general means that it is based on dynamic operation in which any operational constraints can be accommodated. One would expect economic optimization ...

in acceptance-sampling plans, the items of an incoming lot are inspected one by one. if the number of nonconforming items in sample is equal zero, the lot is accepted but if the number of nonconforming items is equal to one, then second sample is taken and the policy of zero acceptance number would be applied for the second sample. in this paper, a mathematical model is developed to design sing...

Programmable logic controllers (PLC) have been one of the important players in manufacturing systems and many other applications with sales of 15 million PLCs worldwide every year. However, our research has revealed that the programming of PLC based control systems is still very much relying on trial-and-error. In addition, current PLC based control systems are not properly designed to support ...