Sharif Digital Repository

Software architecture has been known as one of the fundamental elements of effective software development process. In order to improve and optimize the software architecture design, many attempts have been made among which are introducing architectural patterns. Because of high advantages of service-oriented architecture, it is considered as one of the main interests of software developers. It should be noted, however, that getting advantages from service-oriented architecture is not possible without having an efficient management within its processes. In other words, using service-oriented architecture without considering its process management challenges, can lead to increased costs and... 

Digital image analysis of histological datasets is a currently expanding field of research. Histological images are inherently complex in nature and contain a wide variety of visual information. Graph-based methods have recently gained immense popularity, as these methods can effectively describe tissue architecture and provide adequate numeric information for subsequent computer-based analysis. Graphs have the ability to represent spatial arrangements and neighborhood relationships of different tissue components, which are essential characteristics observed visually by pathologists during the investigation of specimens. In this thesis, we proposed an automatic approach for classification... 

Cancer is refer to a class of diseases that create as the result of abnormal growth of cells and invasion of them to normal cells of human body, and annually cause the considerable percentage of death in the world. Because cancer can be considered as a complex system, various models presented to modeling and simulation of the behavior of it, using of different methods such as cellular automata, agent-based, game theory and other methods. Multi-agent simulation models as a special kind of agent-based models, is a method that used to simulate some real-world phenomena that usually contains many different components and interact using different and complex ways. Since the cells are located in... 

Internet of Things (IoT) is a concept which implies billions of smart objects being connected to the Internet and realizing the smart city. These smart objects generate massive amounts of data and send it to the cloud for process. In reality, sending all the data to the cloud isnn not performant and consumes a lot of energy, therefore fog computing which is a newer concept presented in recent years can be a solution to this problem. By moving the computations to the edge of the network and end devices, fog computing has reduced the cloud approach challenges and is more flexible and scalable. On the other side, software defined networking, with it’s most significant feature which is... 

Multimorbidity in an individual is a typical and increasing condition and a major challenge in healthcare. The goal of treatment recommendation for such patients is to decide the most effective combination of treatments. Doctors typically prescribe medication based on their intuition and experience. However, due to knowledge gaps or unintended biases, often times these clinical decisions can be sub-optimal. Broad adoption and usage of electronic health records (EHRs) in the last decade has opened up a great opportunity to leverage healthcare data to improve clinical decisions.In this approach we use EHR and drug-drug interaction (DDI) information to prescribe medications. We use multiple... 

In cloud federation, a number of cloud service providers (CSP) interoperate to rent each other's computing resources. When a CSP finds a lack in its resources, it can use other CSPs' spare resources for its jobs. This way, the number of physical resources needed by CSPs decreases, since they don't need a pessimistic forecast for resource provision. In this thesis, we analyze possibility of such federation from an architectural viewpoint and then, propose a model to realize such federation. First, we study architectural requirements of cloud federation. A number of important requirements are gathered from previous work. These requirements are then categorized and prioritized, showing that... 

With the rapid development of the economy, more people have started investing in the stock market. Predicting price changes can reduce the risk of investing in stocks. Technical data such as price and volume in the stock market is usually used to predict stock prices, and less often other types of data such as market data or fundamental data are used. In this study, we want to determine what impact each of the available data types has on stock prices. For example, data of buy and sell for per capita, capital inflows and outflows for small and large natural and legal investors, information related to the stocks themselves, indicators, fundamental data such as earnings per share (EPS) and... 

Air pollution has been one of the most important problems in Tehran in recent years. So that the number of deaths due to air pollution in Tehran reaches more than 7000 cases per year. More than 75% of air pollutant emissions in Tehran city (including 60% of PM2.5 emissions) originate from mobile sources. Considering the harmful effects and damages caused by air pollutants, it is important to examine and evaluate the effects of hybrid-electric vehicles on the emissions of the transportation sector and air quality, especially in areas with a large population and realized high traffic load. On the other hand, the continuous reduction of renewable electricity production costs makes electricity a... 

In this project we have worked on the new architecture of the auction based resource scheduling, from the bidders point of view. The performance of different bidding strategies for the resources which participate in reverse auction system has been investigated; our main parameter for evaluating different bidding strategies is the amount of the profit gained by resources which follow such strategies. The main historical bidding strategies are created based on two famous predictors ES and AUTO-REGRESSION. In addition a game theory approach has been proposed. We have shown that our bidding algorithm (based on the sequential game model) reaches to an equilibrium point if all the bidders follow... 

Business Processes are a set of activities which is designed for produce specific output for specific customer or market. Nowadays business processes have a significant role in organizations and they progress to mechanized business processes and transform them to executable workflows. Existence of complex domains with particular requirements from one hand and scale of business projects on the other hand, make existing business processes, which only consider structure and flow of work, are not enough for fulfillment of organizational requirements. By provision of semantics into business processes, which Semantic Web technologies is used in them, business processes become more flexible and... 

internet can be seen as a revolution in human lives whose influences are obvious to everyone and nowadays it’s impossible to consider a world without it. most of people’s means of internet is the world wide web and this shows the importance of web. Web services as a modular and independent applications which can do most of our works through the web, improves its importance. This applications can be located, distributed and called through the web, most of organization’s activity which we can’t imagine internet without it. Semantic web can be considered as a new web architecture which integrates web content with semantics which can be understood by computers. the main motivation for semantic ... 

Due to their highly efficient micromixing rates, confined impinging jet reactors can be beneficial in treating mixing-sensitive processes such as precipitations or crystallizations at high supersaturation. Successful scale-up of these reactors requires a decent insight of geometric design and operating conditions of these systems. This paper deals with the reactive crystallization of calcium carbonate nano-particles in two-impinging jets reactors. The influence of jet velocity (Jet Re number), nozzle diameter, and chamber ratio on the PSD and mean particle size of the product are investigated. In addition, the effect of supersaturation ratio, ion ratio and quenching ratio on the nucleation,... 

Study of real networks has become an important research task. Real networks appear in different domains such as social networks and biological networks. It is also possible to extract various networks from the set of scientific collaborations of published papers. In this project we investigate the analysis of citation network and co-authorship networks of scientific papers in order to find out a new method in citation recommendation of scientific papers. Presented method have some superior properties over existing citation recommendation systems like combining different fields for suggesting most relevant papers to user, in response of user’s input keywords. For presenting this method we... 

The role of natural gas compressor stations, is to maintain the gas pressure at the level required for gas transportation along the pipeline to the distribution system. In Iran, residential heating demand, has a large share in natural gas consumption. Thus the demand of natural gas would be greater in cold winter days in comparison to other seasons. Due to this intense demand fluctuations, geographical diversity of demand, long distances between supply and demand points, supply and demand mismatches and long term investment, there is an intense reliability and load factor issues within these systems operations. In this thesis, natural gas compressor stations are modeled and installation and... 

Gallium is a rare and precious metal that is of particular importance in the electronics industry due to its use in semiconductors. This metal is partially present in bauxite ore. Around 70% of gallium go into sodium aluminate solution during the leaching of bauxite in the Bayer process. Gallium can be extracted from this solution, which is also called bayer solution, by several methods. Solvent extraction is one of the most common methods for recovery of gallium from Bayer's solution. Capabilities of this method for metals separation and concentrating of polymetallic solution, makes it suitable for many commercial and operational application. In present work, different substances used to... 

Considering the aggregation of software architecture design decisions, the decision on appropriate from, is important to the success of a software project. Hence, the software architects need reliable and accurate process for correct decision making which seeks to reduce risk and increase productivity. Furthermore, different stakeholders involved in the architectural design process and presence of cooperation between them for architecture decision making indicates the nature of collaborative activities related to architectural design. Effective collaboration among those involved in the design process not only will affect on the quality and accuracy of the architecture, but also accelerates...