Sharif Digital Repository

Designing and evaluating the segmented production structures of the production system due to the variety of production systems is one of the important issues that have been considered in recent decade. In this research, the paradigm of designing a segmented production system has been studied to increase the adaptation of the organizational structure of production systems to changing and diverse behavior of the market as well as to increase the responsiveness to demand in the organization. The segmented production system provides production units to small, flexible and decentralized production units. The segmentation process used in this research uses an axiomatic design structure. The... 

One of the most important issues in the cloud computing space is the problem of combining services in which after receiving customer demand. Cloud Composition in Cloud manufacturing is explained to meet customer demands. Each of them is done by one (or several) manufacturing plants. This is important for improving cloud manufacturing.The main purpose of service composition is allocation of activities to vendors. Purposes such as minimizing cost and time and constraints such as confirmation minimum reliability and accessibility for vendors are considered. Providing a segmented production system as a service is another way to reduce costs and speed up response and the agility of the system has... 

Since oil is the essential foundation of Irans economy and our country has access to deep water, the extraction of oil from the deep water is essential to our country. So far, due to the possibility of oil exploration in the shallow water of the Persian Gulf, need to invest in deepwater oil industry has not been one of the priorities. However, it seems that in the near future we will need to invest in deepwater. Among subsea structures which we need to use to extract the oil in deepwater, we can mention wellhead manifolds that are used to expand the oil field, optimisation of pipeline length, gathering and distribution of production and injection of water or gas into the wells. In some cases... 

Sample efficiency and systematic generalization are two long-standing challenges in sequential decision-making problems, especially, in reinforcement learning settings. It is hypothesized that involving natural language in conjunction with other observation modalities in decision-making environments can improve generalization due to its compositional and open-ended nature, and sample efficiency due to the concise information summarized in relatively short linguistic units. By exploiting this information and the compositional structure of the language, one can achieve an abstract and factored understanding of the environment and the task at hand. To do so, it is necessary to find the proper... 

Consider a production system with a single product which is demanded by n different customer classes and each customer class has a Poisson demand with rate of λ_i for class i customer class. The important note is that different customer classes have different values for the system and they have different lost sales cost for the system. Therefore, the optimal decision is not necessarily satisfying the customer which arrived sooner. The main idea in this thesis is that for this problem which needs rationing in stock out situations, we can use pricing in line with rationing.
First, we have formulated the problem for the case of two customer classes and two available prices. We formulated...