نتایج جستجو برای: thermodynamic property
تعداد نتایج: 198966 فیلتر نتایج به سال:
استفاده از فولادهای میکروآلیاژ در تولید قطعات خودرو به روش فورج به خاطر صرفه جویی در هزینه ها و کاهش زمان تولید، در چند دهه اخیر گسترش زیادی پیدا کرده است. در این تحقیق رفتار رشد دانه آستنیت با افزایش دمای پیش گرم و اثرات پارامترهای عملیات ترمومکانیکی بر روی فورج فولاد میکروآلیاژ و فولاد ck45 مورد بررسی قرار گرفت. برای ارزیابی ریزساختار و خواص مکانیکی نمونه ها از آزمایش های متالوگرافی و مکانیکی...
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The fact that the properties of a molecule are tightly connected to its structural characteristics is one of the fundamental concepts in chemistry. In this connection, graph theory has been successfully applied in developing some relationships between topological indices and some thermodynamic properties. So , a novel method for computing the new descriptors to construct a quantitative rela...
Quantitative Structure-Property Relationship (QSPR) models for modeling and predicting thermodynamic properties such as the enthalpy of vaporization at standard condition (ΔH˚vap kJ mol-1) and normal temperature of boiling points (T˚bp K) of 57 mono and Polycyclic Aromatic Hydrocarbons (PAHs) have been investigated. The PAHs were randomly separated into 2 groups: training and test sets. A set o...
In the steam power plant, working medium used for energy transformation is water vapor. The thermodynamic properties of vapor are usually obtained by using tables and charts. Adiabatic process widespread in engineering applications. adiabatic realized without heat addition or rejection entropy during a reversible remains constant. During an expansion process, superheated turns into saturated , ...
Formation of inclusion complex of curcumin with β-cyclodextrin ( β-CD) has been characterized by absorption and fluorescence spectroscopy. From temperature-dependent fluorescence measurements, the thermodynamic parameters ∆H and ∆S, for the complexation were estimated. Kinetics of binding was studied by stopped flow technique, from which the binding constants for inclusion complex was estimated...
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