This paper aims at postulating a novel strategy in terms of yard crane scheduling. In this study, a dynamic scheduling model using objective programming for yard cranes is initially developed based on rolling-horizon approach. To resolve the NP-complete problem regarding the yard crane...

In this study, a dynamic allocation model using objective programming for berth allocation and quay crane assignments was preliminarily developed based on rolling-horizon approach. Afterwards, a hybrid parallel genetic algorithm (HPGA), which combined parallel genetic algorithm (PGA) and...

The nature of water resources can be divided into four categories: water for life, water for agriculture, water for industry, and water for ecology. On this basis, the regional right allocation model for water resources is built, and to make the model more operable, we calculate the weight of...

The present study investigates the relationship between a firm's R&D intensity and the risk of its common stock, by analysing a sample of firms which are more profitable, larger in market capitalization and more R&D intensive than the universe of US-listed firms. The results from the portfolio...

Many service firms allow their employees to be directly compensated by customers via the institution of tipping despite the fact this practice exposes firms to substantial risks, such as collusion between employees and customers against the firm. This paper examines a potential reason businesses...

A biologically productive area was used in the ecological footprint method to measure the demand and impact of human activities on the natural capital, and further, to judge whether the impact is within the scope of the regional bio-capacity. In this presentation, an indicator “ecological...