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Dissertations / Theses on the topic 'Single facility'
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Thangavelu, Balajee. "Single-Facility location problem among two-dimensional existing facility locations." Ohio University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1175283985.
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Das, Pali. "Solutions of some single facility location problems." Thesis, University of North Bengal, 1997. http://hdl.handle.net/123456789/600.
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Cheah, Boon Soon. "Multi-item, single facility lot sizing problems." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259521.
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Kotian, Siddharth R. "PLANAR k-CENTRA SINGLE-FACILITY EUCLIDEAN LOCATION PROBLEM." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1132796955.
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Wang, Yi 1970. "Modeling and solving single and multiple facility network restoration problems." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9944.
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Zhang, Yusheng. "Development of a bench scale single batch biomass to liquid fuel facility." Thesis, University of Fort Hare, 2014. http://hdl.handle.net/10353/811.
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The research described in this dissertation was motivated by the global demand for energy that is not dependent on coal, oil, natural gas and other non-renewable fossil fuels. The technology used in this project is related to the use of biomass to produce a viable alternative to conventional sources of fuel. A bench scale biomass to liquid (BTL) facility was built and tested. This produced results confirming the feasibility of the BTL process. The findings of the pilot study outlined in this dissertation justified the conclusion that the next step will be to expand the capacity and productivity of the BTL pilot plant to an industrial scale. Biomass comes from a variety of renewable sources that are readily available. In this case, the material used in the fixed bed biomass gasification facility to generate wood gas was agricultural and forestry waste, such as straw and wood chips. The gasifier had the capacity to produce up to 10 cubic metres/hr of gas with a carbon monoxide and hydrogen content of between 20–40% by volume, when it was operated at ambient pressure and with air as the oxidizer. The gas, produced at a temperature above 700º C, was cooled in a quench/water scrubber in order to remove most of the mechanical impurities (tars and water-soluble inorganic particles), condensed and dried with corn cobs before being compressed in cylinders at over 100 bar (g) for use in the Fischer-Tropsch Synthesis (FTS). The syngas was subjected further to a series of refining processes which included removal of sulphur and oxygen. The sulphur removal technology chosen entailed applying modified activated carbon to adsorb H2S with the help of hydrolysis in order to convert organic sulphur impurities into H2S which reduced the sulphur content of the gas to less than 5 ppbv. Supported cobalt catalyst (100 grams), were loaded into a single-tube fixed bed FT reactor with an inner diameter of 50 mm. The reactor was fitted with a heating jacket through which, heated oil ran to cool the reactor during a normal reaction occurring at < 250 ºC, while nitrogen was used in the heating jacket during reduction, which occurred at temperatures up ~ 350 ºC. The FTS reaction was carried out at different pressures and temperatures. Liquid and wax products were produced from the facility. The properties of the liquid and solid hydrocarbons produced were found to be the same as FT products from other feed stocks, such as natural gas and coal.
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Jithavech, Id. "Facility layout design considering risk for single-period and multi-period cases." Diss., Wichita State University, 2008. http://hdl.handle.net/10057/1953.
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The most desirable characteristic of a facility layout is its ability to maintain its efficiency over time while coping with the uncertainty in product demand. A traditional facility layout design method is governed by the flow intensity between departments, which is the product flow quantity between two departments. Hence, an error in the product demand assessment can render the layout inefficient with respect to material handling costs. Most of this research integrates uncertainty in the form of probability of occurrence of different from-to charts. In an environment where the variability of each product demand is independent, the derivation of “probabilistic from-to chart” based scenarios cannot be used to address uncertainty of individual demands. This dissertation presents a facility layout problem approach to deal with the uncertainty of each product demand in the design of facility layout. Two procedures are presented: the first procedure is utilized to assess the risk associated with the layout, while the second procedure is used to develop the layout that minimizes risk. Results from case studies have shown that the procedure results in reduction of risk by as much as 68 percent.Thesis (Ph.D.) - Wichita State University, College of Engineering, Dept. of Industrial and Mechanical Engineering
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Jacobs, Jason J. (Jason Jay) 1975. "Efficiency measurements of a single stage turbine in a short duration facility." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/47489.
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Jithavech, Id Krishnan Krishna K. "Facility layout design considering risk for single-period and multi-period cases /." A link to full text of this dissertation in SOAR, 2008. http://hdl.handle.net/10057/1953.
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Farham, Mohammad Saleh. "Generalization Of Restricted Planar Location Problems: Unified Meta-heuristics For Single Facility Case." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615417/index.pdf.
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Eaton, Yatika C. "A Framework for Integration of Forward and Reverse Logistics Into a Single Facility." Ohio University / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1168547069.
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Aboulfath, Fouzia. "Optimal maintenance schedules for a fleet of vehicles under the constraint of a single repair facility." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1995. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ51529.pdf.
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Hoskin, Leslie. "Substance abuse treatment for single mothers: A needs assessment." CSUSB ScholarWorks, 2002. https://scholarworks.lib.csusb.edu/etd-project/2105.
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Celestina, Richard A. "Development of New Single and High-Density Heat Flux Gauges for Unsteady Heat Transfer Measurements in a Rotating Transonic Turbine." The Ohio State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1608551902273547.
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Nygren, Viktor. "A Social Ekonomic Study of a Small-Scale Biogas Facility. : Designing and construction for a single household for the production of biogas from easily accessible substrates such as human faeces, household waste, garden waste and manure." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-36085.
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Increased access to energy is a key factor to reduce poverty and to gain increased development and prosperity. Access to energy is not equally distributed globally. On average a Swedish person consumes more energy than 12 individuals in Tanzania. The Msambara village arose in the 1930s. 80% of the inhabitants are children and the families are large. Life expectancy is 52 years for women and 54 for men. The entire region is very poor and the standard of living in Msambara is low, even compared to other parts of the country. In rural Msambara in Tanzania the cooking method is very primitive and is usually carried out indoors on three stones. Indoor pollution is contributing to eye infections. Incomplete combustion not only emits greenhouse gases increasing global warming, but also more directly emits particles effecting human health. Women and girls are particularly vulnerable to burning caused by air pollution, especially since they are responsible for cooking. The women pull a heavy load in the household work. They are responsible for raising and caring for children, managing farms, collecting firewood, fetching water, visiting the market and cooking for the family. The adoption of biogas technology reduces the need for traditional energy and thereby reduces environmental degradation. In addition, the residue is an improved agricultural fertiliser. Biogas technology has social considerations; burning of biomass for cooking reduces indoor air pollution and reduces workload to collect firewood, often performed by women. Moreover, biogas is desirable from an economic point of view. The method in this work can conveniently be divided into three different parts. These are the designing and construction process as well as the socio-economic study. The socio-economic component is split into two different sections, which are field study and data modelling. The study shows that the social negative impact may or may not be reduced by the introduction of the biogas facility, but the biogas facility in the way it is made will potentially contribute to sustainable economic growth for the household. It also shows that the household’s organic waste produced from human, animal, kitchen and garden waste is enough to provide the necessary gas needed for cooking and no additional firewood will be needed. Two diary cows, in addition to the household’s waste, will provide enough gas needed to introduce cooling capacity for food storage. By adding cooling capacity in the household, time will be saved from the food preparation process but the introduction of biogas itself will not reduce the individual work burden when no cooling capacity is installed. The study also shows that placing the digester in the ground makes a stable environment for the mesophilic and methanogenic microbes. The Socio-economic study indicates that by introducing an alternative method to cooking, positive health effects will arise and the household benefits economically. It is not possible from this thesis to conclude that by adding and treating human toilets as a substrate that possible health benefits will take place.Sammanfattning Ökad tillgång till energi är en nyckelfaktor för att minska fattigdom och för att få ökad utveckling och välstånd. Tillgången till energi är inte jämnt fördelad globalt. En svensk person konsumerar i genomsnitt mer energi än 12 individer i Tanzania. Byn Msambara uppstod på 1930-talet, 80 % av invånarna utgörs av barn, familjerna är stora. Medellivslängden är 52 år för kvinnor och 54 år för män. Hela regionen präglas av fattigdom och levnadsstandarden i Msambara är låg, även jämfört med andra delar av landet. I Msambara som ligger på Tanzanias landsbygd är tillagningsmetoden mycket primitiv och utförs vanligen inomhus på tre stenar. Den rökiga inomhusmiljön leder ofta till ögoninfektioner. Den ofullständiga förbränningen frigör inte bara växthusgaser och bidrar till den globala uppvärmningen, utan mer direkt avges partiklar som påverkar människors hälsa. Kvinnor och flickor är särskilt utsatta för luftföroreningar eftersom de är ansvariga för matlagning. Kvinnorna drar ett tungt lass i hushållsarbetet. De är ansvarig för uppfostran och vårdnaden utav barnen, hushållsarbetet, sköta jordbruket, samla ved, hämta vatten, besöka marknaden och att laga familjens mat. Introduktion av biogasteknik minskar behovet av traditionell energi och miljöbelastningen. Rötresten är dessutom ett förädlat gödningsmedel. Biogas introduktionen ger positiva sociala konsekvenser då det leder till reducerade luftföroreningar inomhus och minskar behovet av att införskaffa ved, vilket nästan undantagslöst utförs av kvinnor. Dessutom är biogas positivt ur ekonomisk synvinkel. Arbetsmetoden är tydlighetens uppdelat i tre delar. Nämligen dimensionering av rötkammaren, uppförandet av densamma och en okonstlad socioekonomisk studie som i sin tur är uppdelad i en fältstudie och simulering. Studien kan inte visa på att summan av de sociala negativa effekterna minskar med införandet av biogasanläggningen men däremot att den potentiellt bidrar till stärkt ekonomi för hushållet. Den visar också att hushållens organiska avfall som produceras i form av avfall från människor, djur, kök och trädgård är fullt tillräckligt för att producera den nödvändiga gasen som behövs för matlagning. Ingen ytterligare ved kommer att behövas. Två kor förutom hushållets avfall ger den biogas som krävs för att driva ett kylskåp vilket ökar hållbarheten vid matförvaring. Genom tillförandet av kyleffekt till hushållet frigörs tid vilket innebär en tidsbesparing. Införandet av biogas i sig minskar inte den individuella arbetetsbördan. Studien visar också att placeringen av rötkammaren i marken utgör en stabil miljö för de mesofila metanogena. Den socioekonomiska studien visar att införandet av den alternativ matlagningsmetoden medför positiva hälsoeffekter och är ekonomiskt gynnsamt för hushållet. Från denna studie är det inte möjligt att dra slutsatsen att tillförandet och behandlingen av den mänskliga toaletten i rötprocessen ger hälsofördelar.
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Ball, Barbara Jane. "How sweet it is, a non profit, interfaith, multicultural, living facility with meals, for senior singles on Miami Beach." Theological Research Exchange Network (TREN), access this title online, 1998. http://dx.doi.org/10.2986/tren.108-0012.
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莊承興. "Single facility scheduling with bicriteria." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/83758932456186596698.
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"Modeling and solving the single facility line restoration problem." Massachusetts Institute of Technology, Operations Research Center, 1998. http://hdl.handle.net/1721.1/5112.
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Ting, Hsin-Yi, and 丁興毅. "Solving Single Row Facility Layout Problem With Simplified Swarm Optimization." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/79xm72.
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碩士國立清華大學
工業工程與工程管理學系所
105
Single Row Facility Layout Problem (SRFLP) is a permutation problem which has been widely studied in the academic field in order to improve the efficiency on production site. The main purpose of SRFLP is to find an optimal permutation of a number of rectangular facilities with given material flows between each facility, in order to obtain the minimum total cost by arranging them along a straight line. Since SRFLP has already been proven to be a NP-Complete problem, it is irrational to expect to obtain the global optimal solution by exhaustive methods, therefore the recent researches of SRFLP have therefore been adopted to heuristic algorithms in order to obtain an optimal or a near optimal solution within acceptable CPU time. In this paper, we use a novel, efficient heuristic algorithm called Simplified Swarm Optimization algorithm (SSO), with an effective local search mechanism, and other optimizational techniques to find the near-optimal solution for SRFLP within acceptable time. With a comparison to the computational results of two benchmark problem sets from the previous studies, it is shown that our proposed method has better efficiency in solving SRFLP, without sacrifice the effectiveness of the algorithm. Key
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Sheu, Jyh-Yuan, and 許志源. "Study of multiple-item EPQ model on a single production facility." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/57660970450792042237.
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碩士朝陽科技大學
工業工程與管理系碩士班
91
Abstract The purpose of this research was to study of multiple-item economic production quantity model on a single production facility. Because considerable inventory holding costs and setup costs are incurred in the working capital of many companies, many researchers have devoted themselves to study the inventory replenishment problem for a long time. The main focus of their work is to assist corporations to determine the optimal ordering policies that give appropriate amount of inventories to meet the customers demand at the right time and with the lower cost. A convenient way of determining optimal order quantity with a single production is the basic economic production quantity (EPQ) model. As a result of production rate has often larger than demand rate, there has longer idle time when the equipment produces a single production. A more efficient way is to make Multi-Item production on a single production facility, so used Rotation Cycle method. Although the total cost solution of Rotation Cycle Model is feasible but not is optimum. For this reason, the purpose of this study was to develop a new calculative rule to provide lower total cost solution than Rotation Cycle Model. Keyword：Multi-Item EPQ analysis；Rotation Cycle Model；Economic Production Quantity.
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Utamima, Amalia, and 英妲. "Artificial Particle Swarm Optimization for Solving Single Row Facility Layout Problem." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/61009424214185012459.
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碩士國立臺灣科技大學
工業管理系
100
The layout positioning problem of facilities on a straight line is known as Single Row Facility Layout Problem (SRFLP). The objective of SRFLP, categorized as NP-Complete problem, is to arrange the layout so that the sum of distances between all facilities’ pairs can be minimized. Estimation Distribution Algorithm (EDA) improves the solution quality efficiently in first few runs, but the diversity lost grows rapidly as more iterations are run. To maintain the diversity, hybridization with meta-heuristic algorithms is needed. This research proposes Artificial Particle Swarm Optimization (APSO), an algorithm which consists of hybridization of EDA, Particle Swarm Optimization (PSO), and Tabu Search (TS). Other hybridization algorithms are also built as comparers. They are extended Artificial Chromosomes Genetic Algorithm (eACGA), Estimation Distribution Algorithm Particle Swarm Optimization (EDAPSO), and Estimation Distribution Algorithm Tabu Search (EDAtabu). APSO’s performance is tested in 15 benchmark problems of SRFLP and it successfully achieves optimum solution. Moreover, the mean error rates of APSO always get the lowest value compared to other algorithms. SRFLP can be enhanced by considering more constraints and become enhanced SRFLP. Computational results show that APSO also can solve enhanced SRFLP effectively. Therefore, we can conclude that APSO is a promising meta-heuristic algorithm which could be used to overcome the basic and enhanced SRFLP.
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Tang, Hong. "Stability analysis on single-phase natural circulation in Argonne Lead Loop Facility." Thesis, 2002. http://hdl.handle.net/1957/32151.
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Natural convection provides a means for circulating fluids without the use of
pumps. This type of system is of great interest for a wide variety of applications,
including solar heaters, process industry, and nuclear reactors. Natural
convection will play a vital role in the area of passive safety and reliability,
particularly for the development of Generation IV nuclear energy systems.
This study mainly focuses on the linear stability analysis of asymmetrically
heated/cooled natural convection loops with large temperature variations across
the heated core. The study targets the Argonne Lead Loop Facility (ALLF), a
concept for an experiment loop to support the development of the Secure
Transportable Autonomous Reactor-Liquid Metal (STAR-LM) at Argonne
National Laboratory, using lead-bismuth eutectic (LBE) as the primary reactor
coolant.
A one-dimensional linear stability analysis is performed and the Nyquist
criterion is employed to find the linear stability boundary of both forward and
backward circulations. It was found that the natural circulations could be linearly
unstable in a high Reynolds number region. Increasing loop friction makes a
forward circulation more stable, but destabilizes the corresponding backward
circulation under the same heating/cooling conditions. The preliminary results suggest that as the Peclet number decreases, the forward circulation is prone to
become unstable while the backward circulation is prone to remain stable.Graduation date: 2003
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Yu, Li-Ping, and 游麗萍. "Application of Ant Colony Optimization to Single Facility Scheduling with Warehouse Constraints." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/20081047801477680631.
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碩士國立屏東科技大學
工業管理系
92
Scheduling has been one of the major tasks in operational management. It has direct impact on the efficiency and effectiveness of production operations. In order to obtain a better production schedule to improve the performance of daily production operations and to increase the competition of the business organization, numerous academic researchers and industrial participants have devoted tremendous amount of effort in developing scheduling algorithms. Most of the articles assume that there are always enough storage space for raw materials and warehouse space for finished products. But, in food processing industry, the freezer space is always limited. When there is insufficient space in the freezer to store the finished products or raw materials, the company can either lease extra freezers or postpone the production operations, causing higher costs or late delivery. This thesis proposes a single facility optimal scheduling methodology with storage and warehouse constraints. The sum of three type of costs, namely storage, rush delivery and late delivery penalty costs, is minimized by ant colony optimization technique. The constraints encompassed in the model include due-date, warehouse space, continuous production, and so on. The results show the by ant colony optimization search procedure can converge in limited among of trails. It is also showed that the penalty cost dominates the quality of the solution. Additionally, sensitivity analysis of parameters encountered in ant colony optimization is conducted to search a set of good parameter settings.
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Hou, Chih Ping, and 侯志平. "Application of a single camera at home and medical care facility for fall monitoring." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/33928943930072521568.
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碩士長庚大學
電機工程學系
98
Village Surveillance has become important for personal safety and healthcare in the modern society. Most real-time monitoring systems, e.g automatic fall detectors, require the users to wear a portable device in their daily living. By the technique of pattern recognition on camera images, the inconvenience caused by wearing a device can be reduced. This paper proposes a fall-detection method using images captured by a COMS-based camera .The principal component analysis was applied to transform pixel-coordinates of a moving subject to 3 principle components. The principle components were plotted and analyzed in a 3-dimeusional space to construct detecting rules of falls .According to our experiential results, the method is sensitive on detecting falls toward any direction.
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Zheng, Hong-Liang, and 鄭弘良. "Single Facility Scheduling Study Involving Due Date and Setup Times of Groups of Jobs." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/87283487312077899105.
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Teixeira, João Carlos Vicente. "Public Facility Planning Models with Single and Multiple Services: Models, Solution Methods and Applications." Doctoral thesis, 2012. http://hdl.handle.net/10316/21298.
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Tese de doutoramento em Engenharia Civil, na especialidade de Urbanismo, Ordenamento do Território e Transportes, apresentada à Faculdade de Ciências e Tecnologia da Universidade de CoimbraThis thesis addresses the planning problem of reorganizing an existing network of public facilities, such as schools, hospitals or courts of justice, in response to structural changes in the demand for public services and to the need of improving the costeffectiveness of service provision. “Public facility planning” is here understood as the activity consisting in making decisions on the number, location, type (in terms of the mix of services offered), and capacity of facilities supplying public services, and on their catchment areas (i.e. the population centers served by each facility). Public facility planning problems are addressed in this thesis with mathematical programming (or optimization) models that aim to help decision makers arrive at efficient solutions in terms of costs to service providers and of quality of service to users in key components such as accessibility to facilities. More specifically, the optimization models studied here are discrete facility location models, formulated as mixed-integer linear programming (MILP or MIP) models. This thesis focuses on the following basic, single-service model and on extensions of it. The geographic setting is represented by a discrete set of population centers with known demands, a discrete set of sites where facilities can be located, and given travel distances (or times, or costs) between centers and sites. The problem is to locate facilities and assign centers to those facilities, so that each center is assigned to the closest facility, each facility satisfies minimum and maximum capacity constraints, and the total travel distance is minimized, i.e. accessibility to facilities is maximized. The basic model described above, called the capacitated median model, captures relevant ingredients of public facility planning problems, but it has received little attention in the literature, particularly no hierarchical extension considering multiple services and multiple facility types has been presented, and no specialized exact solution method has been proposed. The contributions of this thesis to the discrete facility location literature are the following: Formulation of optimization models combining multiple services, minimum and maximum capacity constraints, and constraints on the spatial pattern of assignments of users to facilities, extending previous hierarchical facility location models; Description of applications of models with single and multiple services to realworld problems of reorganizing networks of schools and courts of justice in Portugal; Development of new valid inequalities for the MIP formulation of the single service capacitated median model and proposal of an exact solution method, composed of a priori reformulation and branch-and-cut, that reduces solution times relatively to a generic MIP optimizer; Presentation of computational experiments on solving single service models with a modern generic MIP optimizer, including the fixed-charge capacitated facility location problem and the capacitated median model, in order to identify the most efficient formulation, among variants known from the literature, to solve these models to optimality without resorting to a specialized algorithm.
FCT (SFRH/BD/12672/2003); European Social Fund (POSC)
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Yen, Ginger. "Cutting-Plane Separation Strategies for Semidefinite Programming Models to Solve Single-Row Facility Layout Problems." Thesis, 2008. http://hdl.handle.net/10012/4104.
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The single-row facility layout problem (SRFLP) is concerned with finding the optimal linear placement of n departments with different lengths in a straight line. It is typically achieved by minimizing the cost associated with the interactions between the departments. The semidefinite programming (SDP) relaxation model that incorporates cutting planes proposed recently by Anjos, Kennings, and Vannelli (AKV) was considered a breakthrough in the field. This thesis presents a new SDP model AKV' and compares the two relaxations. The AKV' is largely based on the previous model, but it reduces the number of linear constraints from O(n³) to O(n²). Therefore, it reduces the computing time at the expense of a slightly weaker lower bound. However, AKV' is observed to pay off as the instance size increases. By examining the gap for both the AKV and AKV' relaxations, we notice that both relaxations generate very small gaps at the root node, which demonstrates the effectiveness of the relaxations.
Six different strategies are presented to separate the cutting planes for the medium-sized SRFLP. In combination with the two SDP relaxations, we compare the six strategies using three instances of different characteristics. An overall best strategy is deduced from the computational results, but the best choice of relaxations and the best number of cuts added at each iteration changes depending on the characteristics of the instances. Two new cutting plane strategies are proposed for large instances. This allows the solution to optimality of new instances with 36 departments, which is higher than previously published results in literature. We also briefly point out how the computing time can vary greatly between different sets of data of the same size due to the characteristics of the department lengths.
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Liu, Hsiu Hao, and 劉修豪. "Integrated use of soft computing and clustering for capacitated clustering single-facility location problem with one-time delivery." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/44605285239031145119.
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碩士國立清華大學
工業工程與工程管理學系
103
How to set up the distribution centers not only a very general and important issue but also a quite profound knowledge for many different industries in real life. This kind of problem called capacitated clustering location problem (CCP), then the previous literature, the target of the location problem is to minimize the sum of distances from each cluster centers to all customers in their cluster and the practical application of this type, for example: logistics centers, police stations, etc., this approach of shipping called “batch delivery”. However, some types of business or the company shipping methods are different from the above. The distribution centers must ship goods to all customers in its cluster or cluster in a cycle time, such as postman, newsman, etc., this approach of shipping is called “one-time delivery”. One-time delivery can be modeled as a Travelling Salesman Problem (TSP). This type of problem is rarely discussed in the former literature. In order to solve this practical problem, a new hybrid clustering algorithm, Simplified Swarm Optimization combining with K-harmonic means (SSOKHM) is proposed in this paper for the CCP with one-time delivery and using greedy algorithm for the TSP to find the shortest loop and obtain the target: minimize shipping costs. An exchange local search is an inspection mechanism which adds after greedy algorithm. Proposed method is applied to several facility location problems from OR library and compared with other hybrid clustering algorithm. Numerical results show that the proposed approach (SSOKHM) performance is better than using other hybrid clustering algorithms in terms of shipping costs. Finally, we embed the exchange local search for each hybrid clustering algorithm. The results are presented that this inspection mechanism can be work in capacity constraint to enhance the performance of the solution and demonstrate the usefulness of this approach in CCP. Keywords: Capacitated Clustering Location Problem, Simplified Swarm Optimization (SSO), K-harmonic Means (KHM), Travelling Salesman Problem
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Sanjeevi, Sujeevraja. "Mixed n-Step MIR Inequalities, n-Step Conic MIR Inequalities and a Polyhedral Study of Single Row Facility Layout Problem." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11719.
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In this dissertation, we introduce new families of valid inequalities for general linear mixed integer programs (MIPs) and second-order conic MIPs (SOCMIPs) and establish several theoretical properties and computational effectiveness of these inequalities.
First we introduce the mixed n-step mixed integer rounding (MIR) inequalities for a generalization of the mixing set which we refer to as the n-mixing set. The n-mixing set is a multi-constraint mixed integer set in which each constraint has n integer variables and a single continuous variable. We then show that mixed n-step MIR can generate multi-row valid inequalities for general MIPs and special structure MIPs, namely, multi- module capacitated lot-sizing and facility location problems. We also present the results of our computational experiments with the mixed n-step MIR inequalities on small MIPLIB instances and randomly generated multi-module lot-sizing instances which show that these inequalities are quite effective.
Next, we introduce the n-step conic MIR inequalities for the so-called polyhedral second-order conic (PSOC) mixed integer sets. PSOC sets arise in the polyhedral reformulation of SOCMIPs. We first introduce the n-step conic MIR inequality for a PSOC set with n integer variables and prove that all the 1-step to n-step conic MIR inequalities are facet-defining for the convex hull of this set. We also provide necessary and sufficient conditions for the PSOC form of this inequality to be valid. Then, we use the aforementioned n-step conic MIR facet to derive the n-step conic MIR inequality for a general PSOC set and provide conditions for it to be facet-defining. We further show that the n-step conic MIR inequality for a general PSOC set strictly dominates the n-step MIR inequalities written for the two linear constraints that define the PSOC set. We also prove that the n-step MIR inequality for a linear mixed integer constraint is a special case of the n-step conic MIR inequality.
Finally, we conduct a polyhedral study of the triplet formulation for the single row facility layout problem (SRFLP). For any number of departments n, we prove that the dimension of the triplet polytope (convex hull of solutions to the triplet formulation) is n(n - 1)(n - 2)/3. We then prove that several valid inequalities presented in Amaral (2009) for this polytope are facet-defining. These results provide theoretical support for the fact that the linear program solved over these valid inequalities gives the optimal solution for all instances studied by Amaral (2009).
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Du, Guanghua. "A Calcium imaging setup at the single ion hit facility at GSI and its application to the investigation of Calcium response to ion irradiation in mammalian cells." Phd thesis, 2008. https://tuprints.ulb.tu-darmstadt.de/957/1/Dissertation_Du-Part1.pdf.
Full textAbstract:
This thesis reports the construction of a Calcium imaging system at the single ion hit facility at GSI and its application to the investigation of Calcium responses to ion irradiation in mammalian cells. It has been recently reported that not only Calcium ions regulate the cellular responses to ionizing radiation but also that cells show intracellular Calcium responses to ionizing radiation. All previous investigations on this matter were so far done with ionizing radiations with a low linear-energy-transfer (LET). Here we are interested in the Calcium response of cells exposed to heavy ion irradiation, which has a much higher LET and has not been investigated before. To accomplish this, a Calcium imaging system based on ratiometric fluorescence imaging was built at the single ion hit facility for cell irradiation at GSI. The signal-to-noise ratio of the measurements based on fluorescence images reached an average of 96:1 using established image analysis methods. The setup successfully detected the expected Calcium responses in cells treated with Hydrogen Peroxide and spontaneous Ca2+ oscillations in AG1522 cells. These oscillations occurred in standard cell dishes which were sealed air-tight, and could be prevented by using gas permeable cell dishes for experiments. In parallel, the targeting stability of the single ion hit facility was improved and a technique, namely an online hit verification method, was developed to check the targeting accuracy before the cell irradiation. Using the combination of the Calcium imaging system and the single ion hit facility, the intracellular Calcium concentration was examined in HeLa cells and human foreskin fibroblast AG1522-D cells before and immediately after irradiation with 4.8 MeV/nucleon Carbon or Argon ions. No changes of intracellular Calcium level was observed in these two cell lines, both in cell dishes with hypoxic stress or in gas permeable cell dishes without stress. The irradiated AG1522-D samples showed the same behavior of Calcium signaling as control samples under hypoxia stress, under the aspects of the percentage of responding cells, the onset of the oscillations, the frequency and amplitude of the oscillations. It is concluded from these experiments that ion irradiation, and the subsequent cellular responses such as DNA double strand break and phosphorylation of H2A histone protein, do neither induce Calcium signaling nor influence Calcium signaling cascades stimulated by hypoxia stress.
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Du, Guanghua [Verfasser]. "A calcium imaging setup at the single ion hit facility at GSI and its application to the investigation of calcium response to ion irradiation in mammalian cells / from Guanghua Du." 2008. http://d-nb.info/988172208/34.
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Santos, Ana Carolina Martins dos. "A teoria das infraestruturas essenciais : o conflito entre o direito da concorrência e o direito da propriedade intelectual : o caso Google." Master's thesis, 2019. http://hdl.handle.net/10400.14/28643.
Full textAbstract:
A evolução jurisprudencial de um modelo que apresenta as soluções ao conflito de interesses existente entre os direitos de propriedade intelectual e o direito da concorrência encontrado na Teoria das Infraestruturas essenciais, tem sido desafiado pela Economia Digital, no âmbito da qual a inovação desempenha um papel fundamental.
As decisões Google, assim como o interesse das jurisdições Europeias pela economia digital, levam-nos a questionar sobre as possíveis lacunas do direito da concorrência face aos desafios levantados pelas especificidades estruturais e a dinâmica do mercado digital. Com a finalidade de harmonizar a concorrência e a inovação, torna-se necessário face a práticas alegadamente abusivas nos termos do artigo 102 do TFUE, interrogarmo-nos sobre a possível aplicação da teoria das infraestruturas essenciais a ativos digitais, e quais os possíveis remédios em prol da neutralidade e transparência do mercado das pesquisas online e do bem-estar dos consumidores.The jurisprudential evolution of a model that presents the solutions to the conflict of interests existing between the intellectual property rights and the competition law found in the Essential Facility doctrine has been challenged by the Digital Economy, where innovation plays a fundamental role. Google's decisions, as well as the interest of the European jurisdictions in the digital economy, have led us to question the potential gaps in competition law in the light of the challenges posed by structural specificities and the dynamics of the digital market. In order to harmonize competition and innovation, it is necessary in face of allegedly abusive practices under Article 102 TFEU, to ask ourselves about the possible application of the Essential Facility doctrineto digital assets, and what possible remedies neutrality and market transparency ofgeneral internet search markets and consumer welfare.
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Gooley, Nathan John. "Evergreen, bank funding & liquidity management." Thesis, 2016. http://hdl.handle.net/1959.13/1310643.
Full textAbstract:
Research Doctorate - Doctorate of Business Administration (DBA)Government mandated institutions in Australia and Canada have continuously progressed banking regulation throughout time by making gradual alterations to prudential frameworks and supervisory practices. This has included the prompt domestic adaptation of the three Basel accords. A main objective is to ensure banking organisations become more resilient to stresses that impact their capital and liquidity adequacy. Banking organisations are faced with the task of transforming their balance sheets and funding profiles to not only strengthen their balance sheets but to curb heighted liquidity costs that have been brought on by regulatory reform. A review of existing literature on the components of bank funding, liquidity and procyclicality recognises their significance in ensuring individual bank stability and the prevarication of broader systemic implications in the wider economy. This dissertation has examined the historical evolution of the regulatory environments in both Australia and Canada and compared the components of bank balance sheets that offer insights into their funding preference and liquidity holdings, and provide early indicators for procyclicality within the banking sector. It has also had the goal of developing existing research and knowledge of liquidity stresses within bank balance sheets. This research has endeavoured to further balance sheet innovation, through action research that has been carried out over a five year period, to provide banking organisations with options to alter their balance sheets in order to meet the Basel III package of reforms and better deal with liquidity pressures, such as those that were evident in many countries throughout the most recent financial crisis. A new methodology for balance sheet transformation under Basel III, “evergreen” is articulated, with a suite of evergreen asset and liability products and balance sheet exposures being assessed for impact and acceptance within the banking industry. Verification of the evergreen method is demonstrated by the banking industry including it within their strategy for future balance sheet innovation; banks designing and constructing evergreen capability; the regulator encompassing it within prudential standards; and widespread acceptance of evergreen by investors and other financial market participants. Whilst components of evergreen are increasingly becoming a greater part of the banking industry within Australia, it is recognised that the concepts and models of evergreen, are at a primary juncture in their development and require substantial additional focus and research. The usefulness of this dissertation will be established through the particulars of future research settings and must be appraised to the degree that it appears correct, original and apt. Regarding deposits, this dissertation finds that: the existence of voluntary deposit insurance schemes would allow the competitive landscape for retail deposits to become about more than just price; operational deposits are not immune from procyclical competition; Australian banks have a much greater appetite and tolerance for at-call deposit raising; liquidity regulation has permanently shifted the ‘market rate’ for deposit funding above its ‘natural rate’; and foreign currency deposit raising may lead to banks running unhedged positions or developing a larger reliance towards United States Dollars. For wholesale funding, it is observed that: liquidity regulation has increased the reliance of banks on domestic financial markets to fulfil their financing needs; the volume of short-dated prime bank paper being issued in Australia has declined where there are consequences for the Bank Bill Swap Rates; and large differentials in the semi/quarterly spread can substantially impact the profitability of banking book products. The domestic implementation of the Basel III package of reforms on liquidity in both Australia and Canada has, in many ways, imitated the historical approach taken towards bank capital regulation. This dissertation deducts that, as there is for capital, the concept of ‘regulatory’ and ’economic’ liquidity now exists. Furthermore, regulation has introduced a predisposition to government bonds, which may have unintended consequences for both government sponsored issuers and bank investors. Finally, procyclicality must be monitored and managed by the government sponsored institution tasked with the role of implementing monetary policy, rather than institutions that implement and enforce prudential regulation.
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ROMAGNOLI, Valentina. "La gestione dei resi dei clienti come strumento per lo sviluppo del commercio elettronico delle aziende: il caso Santoni S.p.A." Doctoral thesis, 2018. http://hdl.handle.net/11393/251107.
Full textAbstract:
Il settore del commercio elettronico è un settore in sempre più ampio e rapido sviluppo. Le motivazioni possono essere molteplici ma sono sicuramente legate al cambiamento dello stile di vita delle persone e alla possibilità di accedere all’acquisto di beni che altrimenti sarebbe stato pressoché impossibile acquistare.
La disciplina riguardante questo settore è anch’essa stata elaborata mano a mano che questo settore si è evoluto, per rispondere di volta in volta alle diverse necessità che si sono presentate.
La disciplina è tutt’oggi ancora in evoluzione, soprattutto a causa del fatto che in questo settore ci sono molteplici forme contrattuali che vengono utilizzate per creare accordi commerciali dei più vari tipi, e ognuno dei quali prospetta problematiche diverse.
In questo lavoro si parte dalla nascita e dallo sviluppo del commercio elettronico per analizzare l’evoluzione della disciplina associata. Dopodiché si analizza il tipo di contratto posto in essere tra la Santoni S.p.A. (noto marchio di calzature di alta gamma) e la Filoblu s.rl. (società veneta che si occupa della creazione e gestione di piattaforme e-commerce) per valutarne i punti cruciali.
Dopo aver analizzato in dettaglio gli aspetti sopra citati, viene illustrata la disciplina delle denunce per difetto di conformità del bene e come queste vengono gestite dalla Santoni S.p.A., per passare poi all’analisi delle denunce per difetto di conformità degli ultimi 3 anni.
Questo perché, come si noterà, questo è un campo in cui le problematiche sono controverse e gran parte della gestione viene lasciata alle ditte produttrici che si trovano di volta in volta di fronte alla scelta su come gestire il caso per rendere il cliente soddisfatto del servizio.
La disciplina segue i suoi sviluppi e cerca di prevenire (per quanto possibile) situazioni sgradevoli sia per il fornitore del bene che per l’acquirente.
L’entusiasmo mostrato dagli acquirenti per la comodità e la facilità dell’acquisto on-line, viene molto spesso smorzato dall’impossibilità di vedere e toccare con mano il bene oggetto della transazione, creando un senso di inquietudine legata alla qualità del bene che si sta acquistando.
Per questo motivo, nel momento in cui un acquirente denuncia un difetto di conformità sul bene acquistato on-line o semplicemente la sua insoddisfazione su determinati aspetti del bene (colore, calzata, forma, ecc.), si attiva un meccanismo volto a valutare la presenza o meno di un eventuale difetto sul bene e di risolverlo nel modo più soddisfacente per l’acquirente.
Dopotutto per un’azienda, gestire un negozio on-line equivale ad avere una vetrina di sé stessa attiva 24 ore su 24 e visibile a chiunque abbia un accesso al mondo di internet, e per questo motivo gestire i clienti che utilizzano questo tipo di servizio significa migliorare o peggiorare, in maniera esponenziale rispetto a quanto può avvenire in un negozio fisico, l’immagine percepita da ogni singolo acquirente.
C’è però da dire che, in molti casi registrati, nonostante una perizia tecnica effettuata da operai specializzati sul prodotto venduto, la poca conoscenza dei processi di produzione dei singoli clienti, mette i venditori in situazioni difficili da gestire, in quanto il cliente non riesce a capire che quello che lui percepisce come un difetto in realtà non lo è, e che quindi non è imputabile all’azienda quello che lui crede che lo sia.
Generalmente in questi casi, sempre per cercare di limitare degli inevitabili danni d’immagine, si offrono al cliente soluzioni alternative come resi gratuiti, omaggi di piccoli prodotti complementari o buoni sconto su acquisti successivi, ma sarebbe sicuramente necessaria una normativa completa e definitiva, che indichi in maniera risoluta come gestire casistiche particolari che si presentano frequentemente nella fase post-vendita.
Viste le innumerevoli problematiche che si riscontrano frequentemente in questo ambito, la normativa a tutt’oggi presente non risulta essere sufficientemente soddisfacente per lo scopo a cui è stata creata.
Come detto precedentemente, tutto il meccanismo che viene messo in atto all’interno di ogni azienda dopo una denuncia di difetto di conformità, si innesca per risolvere il problema ed evitare un inevitabile danno d’immagine, quindi si può concludere che, nonostante la presenza di una normativa (anche se ancora in via di sviluppo), l’arma migliore che un consumatore on-line può mettere in atto e che spaventa di più i venditori è sicuramente il danno d’immagine.
Una cattiva recensione su un blog, un social network, o semplicemente un racconto di una brutta esperienza derivante da un acquisto on-line, può vanificare tutti gli sforzi fatti dal venditore per raggiungere una buona percezione del proprio marchio, e innestare un meccanismo a catena che non giova all’immagine aziendale.