The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, an off-design performance prediction model for a single shaft industrial gas turbine (IGT) using Microsoft Excel with Visual Basic for Applications (VBA) programming is presented. The modelling architecture is comprised of fundamental thermodynamic equations describing the performance of IGTs. A graphical user interface has been constructed to allow an easy interaction of the model...
The present study has as objective to analyze frequencies of Thunderstorm that occurred in the province of Luanda (1998 to 2015), A thermodynamic study of an intense event, to evaluate the operation of the thermodynamic method. This method was based on the vertical profiles, predicted 48 hours in advance, indices of instability and trajectories of the HYSPLIT model for forecasting. Topographic influence...
RNA secondary (2D) structures are essential for cellular processes including protein translation; indeed some RNA viral pathogens use this strategy during replication cycle. Among Flaviviridae family, Hepatitis C Virus (HCV) presents a well experimentally-characterized secondary structure called IRES (Internal Ribosome Entry Site), which could be used as a Viral model for evaluating the accuracy RNA...
Ribonucleic Acid (RNA) plays a vital role in many functions of a cell including the synthesis of proteins. Its structure is crucial in allowing RNA to serve its functions. SARNA-Predict-pk, which uses Simulated Annealing (SA), has shown excellent results in predicting the secondary structure of RNA molecules. Since SARNA-Predict-pk identifies low energy structures, it relies on thermodynamic energy...
Natural gas is rapidly growing in global importance both as a primary energy source and a feedstock for downstream industry. Natural gas produced from reservoirs, usually coexist with formation water. At the proper conditions of pressure and temperature, coexistence of water with the small size molecules in natural gas, may lead to gas hydrate formation. Gas hydrates are solid crystalline compounds...
The shape that organic molecules such as biopolymers form within organic systems largely determines the function said molecules perform. RNA is a biopolymer that plays a central part in several stages of protein synthesis, and also has structural, functional, and regulatory roles in the cell. In an ab initio case most common structure prediction techniques employ minimization of the free energy of...
Intermetallic compound (IMC) formed in the interfacial reaction may exert much influence on the reliability of soldering joint. So, effective prediction of IMC formation at soldering joint may do help to optimize the packaging process. Recently, a semi-empirical criterion has been proposed in our group to predict the formation of intermetallic compounds (IMC) at the interface between different pure...
RNA has important structural, functional, and regulatory parts in the cell as well as a critical role in multiple stages of protein synthesis. An RNA molecule's shape largely determines its function in an organic system. Accordingly, computational RNA structural prediction methods are of significant interest. For ab initio cases where only an RNA sequence is known, structure prediction techniques...
Considering the need of an advanced process control in cement industry, this paper presents an adaptive model predictive algorithm to control a white cement rotary kiln. As any other burning process, the control scenario is to expect the controller to regulate the temperature and the period of baking a fixed quantity of raw material as desired, as well as to have the concentration of the combustion...
As many thermoelectrics are in polycrystalline form with grain size down to nanometer scale, the size and boundary effect play important roles in their physical properties. In the paper we develop an approach to simulate the electronic and thermo-electric property of polycrystalline. In the first step, the polycrystalline texture is created from phase field method in a two dimension scale for simplicity...
A theoretical model is proposed in this work for an evaluation of the specific heat and Debye temperature of thin-film semiconductors. In the model, the specific heat contributed by the confined acoustic phonons is calculated first. An effective Debye temperature is then defined by fitting the conventional Debye model to the calculated specific heat. It is found that the so-defined Debye temperatures...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.