نتایج جستجو برای: strain energy optimization

تعداد نتایج: 1158223  

2004
Raquel Ramos Pinho João Manuel R. S. Tavares

This paper presents a physics-based approach to obtain 2D or 3D dynamic pedobarography transitional objects from two given images (2D or 3D). With the used methodology, we match nodes of the input objects by using modal matching, improved with optimization techniques, and solve the Lagrangian dynamic equilibrium equation to obtain the intermediate shapes. The strain energy involved can also be ...

Journal: :international journal of advanced design and manufacturing technology 0
mahmoud mehrdad shokrieh professor mohsen ghajar

in this paper the critical strain energy release rate for t300/913 carbon-epoxy laminated composites has been studied using ansys finite element software based on virtual crack closure technique ( vcct ). compact tension ( ct ) specimen has been used for numerical analyses and the geometrical dimensions have been extracted from the existing references. the results obtained from the finite eleme...

M. Rezaee–Pajand, Y. Kadkhodaye Bahre

This study focuses on the optimization of the plane structure. Sequential quadratic programming (SQP) will be utilized, which is one of the most efficient methods for solving nonlinearly constrained optimization problems. A new formulation for the second order sensitivity analysis of the two-dimensional finite element will be developed. All the second order required derivatives will be calculat...

Behrooz Abtahi Gholamhossein Ebrahimipour Mohsen Shahriari Moghadam Nafsa Khazaei Negin Karbasi

Background: Hydrocarbons degradation is principally achieved by microorganisms in natural environments. The extent of hydrocarbons biodegradation is mainly conditioned by environmental factors and its success depends on the optimal condition for the crude oil degrading isolates. Objectives: The aims of the current study was to isolate and identify crude oil degrading bacterium from surface sed...

Journal: :Journal of biomechanics 1992
H Weinans R Huiskes H J Grootenboer

The process of adaptive bone remodeling can be described mathematically and simulated in a computer model, integrated with the finite element method. In the model discussed here, cortical and trabecular bone are described as continuous materials with variable density. The remodeling rule applied to simulate the remodeling process in each element individually is, in fact, an objective function f...

M Moosavi Mashhadi M Motamedi,

An elastomer is a polymer with the property of viscoelasticity, generally having notably low Young's modulus and high yield strain compared with other materials.  Elastomers, in particular rubbers, are used in a wide variety of products ranging from rubber hoses, isolation bearings, and shock absorbers to tires. Rubber has good properties and is thermal and electrical resistant. We used carbon ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده کشاورزی 1391

به منظور بررسی اثر باکتری های محرک رشد در تلفیق با کودهای شیمیایی و آلی بر عملکرد کمی و کیفی سورگوم رقم پگاه، آزمایشی به صورت طرح بلوک کامل تصادفی با سه تکرار طی فصل زراعی 91-90 در موسسه تحقیقات برنج رشت انجام شد. تیمارهای مورد استفاده، بدون کود و بدون تلقیح (شاهد)، استفاده از کود شیمیایی و بدون تلقیح، تلقیح بذر باpseudomonas fluorescens strain 12 +azotobacter chroococcum strain 41 + بدون کود ش...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم و فنون دریایی خرمشهر - دانشکده علوم دریایی و اقیانوسی (شعبه خرمشهر) 1391

pah ها هیدروکربن های آروماتیکی هستند که از دو یا چند حلقه بنزنی تشکیل شده اند. این ترکیبات دارای منشا انسانی و طبیعی می باشند و بدلیل گستردگی حضور، پایداری، قابلیت تجمع زیستی و فعالیت سرطانزایی به یک نگرانی مهم زیست محیطی تبدیل شده اند. گرچه pahها دستخوش فرآیند های جذب سطحی، تبخیر، تجزیه نوری و تجزیه شیمیایی می شوند اما تجزیه میکروبی اصلی ترین فرآیند حذف این ترکیبات از محیط است. در کشورهای رو ب...

E. Rajaei M. A. Borji

In this paper, we have studied the strain, band-edge, and energy levels of cubic InGaAs quantum dots (QDs) surrounded by GaAs. It is shown that overall strain value is larger in InGaAs-GaAs interfaces, as well as in smaller QDs. Also, it is proved that conduction and valence band-edges and electron-hole levels are size dependent; larger QD sizes appeared to result in the lower recombination...

The deployment of multi-carrier energy systems, which are called energy hubs, is one of the most recent and useful strategies in the field of energy systems. The reliability of energy systems and their operation cost and efficiency could be improved by applying the concepts of energy hubs. The simultaneous management of electrical consumptions and heat demands by the concepts of energy hub woul...

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