دانلود پاورپیونت Network Model - پنجاه و نه اسلاید

اختصاصی از رزفایل دانلود پاورپیونت Network Model - پنجاه و نه اسلاید دانلود با لینک مستقیم و پر سرعت .

nData are represented by collections of records.

lsimilar to an entity in the E-R model

lRecords and their fields are represented as record type

type  customer = record  type  account = record
  customer-name: string;  account-number: integer;
  customer-street: string;  balance: integer;
  customer-city: string;

end  end

nRelationships among data are represented by links

lsimilar to a restricted (binary) form of an E-R relationship

lrestrictions on links depend on whether the relationship is many-many, many-to-one, or one-to-one.

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Offshore outsourcing of customer relationship management: conceptual model and propositions

اختصاصی از رزفایل Offshore outsourcing of customer relationship management: conceptual model and propositions دانلود با لینک مستقیم و پر سرعت .

این لینک به سفارش دانشجو فعال شده است.

A strategic planning model for natural gas transmission networks

اختصاصی از رزفایل A strategic planning model for natural gas transmission networks دانلود با لینک مستقیم و پر سرعت .

Abstract

The design and development of natural gas transmission pipeline networks are multidisciplinary problems that require various engineering knowledge. In this problem, the type, location, and installation schedule of major physical components of a network including pipelines and compressor stations are decided upon over a planning horizon with least cost goal and subject to network Practically, this problem has been viewed as a conceptual design case and not as an optimization problem that tries to select the best design option among a set of possible solutions. Consequently, conceptual design approaches are usually sub-optimal and work only for short-run development planning. We propose an integrated nonlinear optimization model for this problem. This model provides the best development plans for an existing network over a long-run planning horizon with least discounted operating and capital costs. A heuristic random search optimization method is also developed to solve the model. We show the application of the model through a simple case study and discuss how non-economic objectives may also be incorporated into model.

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تعداد صفحات: 15

حجم فایل زیپ: 198 کیلوبایت