Monday, June 24, 2019

A Multistage Logistics System Design Problem With Inventory Considering Demand Change By Hybrid Genetic Algorithm

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The logistics model used in this study is a three‐stage model employed by an automobile company, which aims to solve traffic problems at a total minimum cost. Recently, research on the metaheuristics method has advanced as an approximate means for solving optimization problems as found in this model. These problems can be solved using various methods such as a genetic algorithm (GA), simulated annealing, and tabu search. A genetic algorithm is superior in terms of robustness and adjustability toward a change in the structure of these problems. However, a genetic algorithm has a disadvantage in that it has a slightly inefficient search performance because it carries out a multipoint search. A hybrid genetic algorithm that combines another method is attracting considerable attention since it can compensate for a fault in a partial solution in which early convergence has a negative impact on a result. In this study, we propose a novel hybrid random key‐based genetic algorithm (h‐rkGA) that combines local search and parameter tuning of the crossover rate and mutation rate; h‐rkGA is an improved version of the random key‐based genetic algorithm (rk‐GA). We attempted comparative experiments with a spanning tree‐based genetic algorithm, priority‐based genetic algorithm, and random key‐based genetic algorithm. Further, we attempted comparative experiments with “h‐GA by only local search” and “h‐GA by only parameter tuning.” We report the effectiveness of the proposed method on the basis of the results of these experiments.


Text from Volkswagen of America. LAS VEGAS, Nev. — Volkswagen of America’s relationship with the driving enthusiast starts at any Volkswagen dealer and the catalog of Genuine Volkswagen Accessories. It’s where personalization, high quality and perfect fit come together in a package backed by a factory warranty and, just as importantly, factory research and development. To show how these elements can result in stunning statements of individualized styling, Volkswagen let loose its accessories crew on two of its new turbocharged sports sedans for display at the 2005 SEMA Show. The 2006 Jetta 2.0T and 2006 Passat 2.0T each were re-tailored with a Votex body kit consisting of front, side and rear skirts and a rear deck spoiler. 2,999 option, and it also includes silver tail lamps and 17X7-inch Vision alloy wheels with 225/45R17 all-season tires. For this SEMA Show special, however, Genuine Volkswagen Accessories mounted a set of 18X8-inch Karthoum alloy wheels in a smoke finish and wrapped them with 225/40R18 Michelin performance rubber. Style and utility are well blended in the Jetta’s interior accessories, which include Monster Mats, a Golf Ball Retro shift knob and an iPod adapter.


The Jetta’s voluminous trunk was made more user-friendly with a cargo net and a Gorilla Gear trunk liner and cargo organizing blocks. The 2006 Passat 2.0T is outfitted in similar fashion. The Passat starts off with an elegant Votex body kit. It’s then complemented with a set of 18x8-inch Velos alloy wheels with 235/40R18 Michelin performance tires. Next, enhanced stance is achieved with the help of Eibach Sport Springs. High quality and OEM fit are the two most important requirements of a Genuine Volkswagen Accessory. Whether it’s an entire Votex body kit, a Golf Ball Retro shift knob or a set of sport springs, a Genuine Volkswagen Accessory is designed to enhance a Volkswagen’s looks or dynamics without compromising comfort or safety. Founded in 1955, Volkswagen of America, Inc. is headquartered in Auburn Hills, Michigan. It is a subsidiary of Volkswagen AG, headquartered in Wolfsburg, Germany. Volkswagen is one of the world’s largest producers of passenger cars and Europe’s largest automaker. Volkswagen of America and its affiliates employ approximately 3,000 people in the United States and are responsible for the sale and service of Audi, Bentley, and Volkswagen products through retail networks comprising in total more than 900 independent U.S.


Bold is an excellent way to describe the 2014 Volkswagen Touareg. The five-passenger SUV is a pleasure to drive with its 280-horsepower, 3.6-liter V6 engine with an eight-speed automatic transmission and all-wheel drive. It has a combined MPG of 20 and a 7,716-pound maximum towing capacity. It comes in nine trim levels. Its attractive styling includes a chrome bodyside insert, body-colored door handles, heated door mirrors, a power liftgate, and black grille. Inside, there is a SiriusXM AM/FM/HD/Satellite radio, six-disc CD changer, audio theft deterrent, steering-wheel-mounted audio controls, and an eight-speaker sound system. The automaker built the vehicle for comfort with front dual-zone air conditioning with automatic temperature control, a universal garage door transmitter, remote keyless entry, cruise control, proximity key, a refrigerated glove box, and auto-dimming rearview mirror. It handles well with Servotronic speed-sensing hydraulic power-assist rack-pinion steering, antilock brakes, and independent rear multi-link suspension with an anti-roll bar. Bold is an excellent way to describe the 2014 Volkswagen Touareg. The five-passenger SUV is a pleasure to drive with its 280-horsepower, 3.6-liter V6 engine with an eight-speed automatic transmission and all-wheel drive. It has a combined MPG of 20 and a 7,716-pound maximum towing capacity. It comes in nine trim levels. Its attractive styling includes a chrome bodyside insert, body-colored door handles, heated door mirrors, a power liftgate, and black grille. Inside, there is a SiriusXM AM/FM/HD/Satellite radio, six-disc CD changer, audio theft deterrent, steering-wheel-mounted audio controls, and an eight-speaker sound system. The automaker built the vehicle for comfort with front dual-zone air conditioning with automatic temperature control, a universal garage door transmitter, remote keyless entry, cruise control, proximity key, a refrigerated glove box, and auto-dimming rearview mirror. It handles well with Servotronic speed-sensing hydraulic power-assist rack-pinion steering, antilock brakes, and independent rear multi-link suspension with an anti-roll bar.


The Volkswagen Jetta, or the VW Jetta is a car that is made by the Volkswagen Company and is basically a sedan variation of the Volkswagen Golf. The name ‘VW Jetta was used only in South Africa and North America until 2005. Volkswagen used the names ‘Vento and then ‘Bora in Europe. The VW Jetta was made because the marketing people at Volkswagen were astute enough to realize that the people in the United States preferred to drive sedan model cars as opposed to hatchback models like VWs Golf car. South Africa shows similar preferences and so marketing for both America and South Africa remains almost identical. Volkswagens marketing team proved that they made advantageous observations as the Jetta eventually became the best selling European car in the United States. The Jetta first made its debut in North America in 1980. It was available as either a two-door coupe or a four-door sedan. This model had a different version called the Volkswagen Fox that was sold only in South Africa.