This paper presents a model for strategically locating drop-lots on a supply chain distribution network. The problem is modelled as a set covering location problem with the addition of a set of minimum-distance-away constraints. The effect of these constraints on the solution space is dramatic, reducing the problem size significantly. It is also proposed that the use of drop-lots in a supply chain can have beneficial quality of life effects for the truck drivers in such a system by allowing them more home time. A real-life example problem from the Midwest is used to validate the model and some computational experience is also reported.
NEC Classifications and Divisions for Hazardous Locations
Electrical equipment in hazardous (classified) locations present a serious threat for workers due to the existence of explosive dust and vapors. Examples of such facilities range from grain mills and gasoline stations to aircraft hangars and chemical manufacturing plants. To prevent devastating explosions that may occur from the ignition of combustible particles in the atmosphere, the National Electric Code (NEC) published guidelines on the proper classification of hazardous locations. Classes, Divisions and...
Hazardous Location LEDs in Chemical Manufacturing Facilities
Employees inside chemical manufacturing plants are exposed to some of the most unforgiving work conditions in the industrial sector. This is because in such environments, workers are exposed to extreme temperatures, dust, volatile chemicals and invisible, explosive gases. Common protection methods against explosive risks include containment, segregation and prevention. Out of all the options, explosive containment is the only method that allows an explosion to take place, in a confined and safe manner through...
Optimal location of artificial recharge of treated wastewater using fuzzy logic approach
Increasing water demands in light of limited water resources have intensified exploitation and drawdown of groundwater. On the other hand, rising water demand has accelerated wastewater production. Therefore, urban wastewater management via artificial recharge may play a significant role in aquifer management. While site selection for artificial recharge projects is a major challenge, fuzzy logic provides one of the most viable approaches for this purpose. Considering the high volume of wastewater production in...
Locating Leaks for Cooling Water Systems
This article illustrates how to locate leaks on cooling water systems in loud, industrial environments like Nuclear or Coal power generating plants without digging or putting anything inside the pipeline. Infrared-Energy Pattern Analysis (IR-EPA) works on all pipeline sizes and all pipeline materials because it identifies the water outside the pipeline instead of listening for leak noises like traditional leak detection techniques. IR-EPA is safe due to its passive nature and only monitors the ground surface...
GPS-enabled gas analyser finds & proves borehole locations case study
Prove it? They can now! Landfill technicians and environmental consultants can now find and prove borehole locations with a GPS-enhanced portable gas analyser from Geotech. Its on-board GPS guidance system takes staff to the precise location of the 1000 it can store. It adds the GPS-received location, date and time to the gas analysis record. GPS locations can be added at boreholes or pre-loaded from surveys, marked maps or from another analyser. For landfill operators, and consultants working on brownfield...