نتایج جستجو برای: optimal nodal ordering

تعداد نتایج: 417446  

Journal: :international journal of optimaization in civil engineering 0
a. kaveh a. dadras

in this paper a guided tabu search (gts) is utilized for optimal nodal ordering of finite element models (fems) leading to small profile for the stiffness matrices of the models. the search strategy is accelerated and a graph-theoretical approach is used as guidance. the method is evaluated by minimization of graph matrices pattern equivalent to stiffness matrices of finite element models. comp...

Dadras, A., Kaveh, A.,

In this paper a Guided Tabu Search (GTS) is utilized for optimal nodal ordering of finite element models (FEMs) leading to small profile for the stiffness matrices of the models. The search strategy is accelerated and a graph-theoretical approach is used as guidance. The method is evaluated by minimization of graph matrices pattern equivalent to stiffness matrices of finite element models. Comp...

Vinod Kumar Mishra

In this paper we develop an inventory model, to determine the optimal ordering quantities, for a set of two substitutable deteriorating items. In this inventory model the inventory level of both items depleted due to demands and deterioration and when an item is out of stock, its demands are partially fulfilled by the other item and all unsatisfied demand is lost. Each substituted item incurs a...

2008
Gunther Reißig

We investigate the performance of a combination of sophisticated local symmetric ordering methods with a simple symmetrization step on a test set of Jacobians obtained from modified nodal equations. It is demonstrated that using such ordering heuristics as a replacement for Markowitz’ algorithm may accelerate circuit simulation significantly.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1379

امروزه سیستم های قدرت از پیچیدگی روزافزونی برخوردار شده اند و در این میان پدیده پایداری ولتاژ با پاسخ زمانی نسبتا کند و عواقب بسیار خطرناک آن، محققان و شرکتهای بزرگ تولیدکننده و پشتیبان را بر آن داشته که آن را بطور جدی مورد بررسی قرار دهند. یکی از روشهای بهبود پدیده فوق استفاده از منبع قدرت راکتیو می باشد که علاوه بر اینکه پایداری ولتاژ تاثیر می گذارند مستقیما پروفیل ولتاژ را نیز تحت تاثیر قرار...

Journal: :international journal of supply and operations management 2015
a lakshmana rao k srinivasa rao

inventory models play an important role in determining the optimal ordering and pricing policies. much work has been reported in literature regarding inventory models with finite or infinite replenishment. but in many practical situations the replenishment is governed by random factors like procurement, transportation, environmental condition, availability of raw material etc., hence, it is nee...

M. Vijayashree R. Uthayakumar

Lead time is one of the major limits that affect planning at every stage of the supply chain system. In this paper, we study a continuous review inventory model. This paper investigates the ordering cost reductions are dependent on lead time. This study addressed two-echelon supply chain problem consisting of a single vendor and a single buyer. The main contribution of this study is that the in...

In this paper fully fuzzy linear programming (FFLP) problem with both equality and inequality constraints is considered where all the parameters and decision variables are represented by non-negative trapezoidal fuzzy numbers. According to the current approach, the FFLP problem with equality constraints first is converted into a multi–objective linear programming (MOLP) problem with crisp const...

In this paper, we develop a procedure for selecting a supplier. Suppliers are characterized by their lead time, price and quality (random yield). Each purchased item is acceptable with a given probability and independent of the others. We assume the demands are deterministic with no set-up cost and backordering is allowed. For each supplier, an optimal ordering policy is developed. We prove the...

Journal: :Journal of Approximation Theory 1997

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