Traditional steam methane reforming facilities for producing hydrogen not only consume a large amount of natural gas, but also emit a lot of greenhouse gas. Considering the utilization of clean energy, the reduction of carbon dioxide emission, and the production of chemicals, this paper...

A combined heat and power plant with regenerative closed-cycle gas turbine is considered. The heat transfer losses, irreversible adiabatic losses and irreversible pressure drop losses are considered in the plant. The expressions of dimensionless profit rate and exergy efficiency are gained. The...

This paper studies the evolutionary characteristics of international trade of potassium salts. We construct a weighted and directed complex network model of potassium salt trade, analyze the scale and activity, trade relations, trade flow distribution and the importance of trading countries...

Problem Definition: Many import items sold at Walmart.com have two suppliers: one is faster and has a random production capacity limit while the other is slower and has infinite capacity. The lead time difference of the two suppliers could be as large as 12 weeks. Walmart.com faces an important...

Based on the observed behavior of monetary aggregates and exchange rates, we classify inflation-stabilization episodes into two categories: de facto exchange rate-based stabilizations (ERBS) and non-ERBS. Unlike the standard de jure ERBS studied in the literature, de facto ERBS encompass cases...

This study aimed to estimate the cost-effectiveness and returns on investments of HIV prevention programs implemented during 2006-2010 and to identify the optimal allocation of resources across combinations of programs for an effective HIV prevention response to inform the prioritization of...