فهرست مطالب مجید غیوری

The main purpose of this research is to review and Redefine about data-driven business according to data-driven economies features in order to help policymakers in the domains of ICT Industry, Entrepreneurship, Iran Digital Economy and Iran Digital Ecosystems.

This paper is a kind of Narrative literature review in which the documentary technique is used.

In this study, a new definition of data-driven Business is presented based on eight principles from previous studies.

The researchers believe that the result of the text can be exploited in the following ways: Supreme Council of Cyberspace, in particular the efforts of content, technology and regulation departments , the Vice President of Science and Technology of the Presidency of the Islamic Republic of Iran, in particular the efforts of policy, innovation and commercialization departments, the project of Iran Big Data Roadmapping with a code of 904550100 at the Communication and Information Technology Research Institute in and Data Governance Program of the Ministry of Science, Research and Technology.

Intrusion detection systems are responsible for diagnosing and detecting any unauthorized use of the system, exploitation or destruction, which is able to prevent cyber-attacks using the network package analysis. one of the major challenges in the use of these tools is lack of educational patterns of attacks on the part of the engine analysis; engine failure that caused the complete training,  the result is in production of high volumes of false warnings. On the other hand, the high level of intrusion detection training time will cause a significant delay in the training system. Therefore, in the analysis section of the intrusion detection system, we need to use an algorithm that shows significant performance with the least educational data, hidden Markov model is one of these successful algorithms in this field. This Research also is trying to provide a misuse based intrusion detection solution with the focus of the evolutionary Hidden Markov model, the EHMM, which is designed to overcome the challenges posed. The most important part of hidden Markov model is to adjust the values of the parameters, the more adjusted values, optimal values would be more effective. The hidden Markov model is more likely to predict the probability of future values.  Therefore, it has been trying to end the mail based on the causative analysis of NSL data sets-KDD using evolutionary programming algorithm for hidden Markov model for the optimal parameters and sort of teach it. Then, using it, the types of attacks in the dataset were identified. To evaluate the success rate in improving the accuracy percentage EHMM proposal intrusion detection, MATLAB System simulation environment has been implemented. The results of the investigation show fitted, EHMM plan, the percentage of the average is 87% of intrusion detection (if hidden Markov model is used normal) to over 92% (in the case of the hidden Markov model using evolutionary) increases. Also after training the training data in both methods based on conventional and evolutionary Markov model, the time of the target system for a training data set is approximately two hundred thousand record from  low average of 489 minutes to more than 400 minutes has been dropped in the proposed method. This outcome achievement and making it operational on intrusion detection for the native system, can cause a defensive improvement which can be fitted in front of the other country for hostile cyber.

Due to the high demand of steel factories, the necessity of localization of mechanical laminar was introduced from Mobarakeh Steel Company of Isfahan. In this research, we first studied the working conditions and the extraction of the forces applied to the waterworks. The investigations showed that the forces are quasi-static and the pressure values are PH=225Pa and PGr=220Bar, and the torque TS=306.07N.m. The results of the tensile test showed that the final strength for the waterworks and belt was 620.3 and 594.1 MPa, respectively. In order to make the desired waterworks, the belt was prepared in 6 steps from the mold and formed a circular shape. Using the matrix pitch matrix, the staircase was created on the waterworks. The results of static analysis on the mechanical laminar and domestic laminar showed that the maximum stresses, based on Von Mises theory, were 1.39×108 Pa and 3.2×108 and the confidence coefficient for each was 2.808 and 1.338, respectively.

Nowadays, there is a large amount of information on the web and a significant portion of this amount of information has been appeared in the form of XML. One of the main advantages of using XML is to show the non-structured data which presents many capabilities for users. Being Non- Structured and the flexibility of XML make it a common method for use and a notable procedure in the security of databases. Therefore, security at XML documents is an important requirement. Data stored at any format must be protected from any possible attack. In order to prevent from such attacks, various methods and models have been designed and implemented. These models are based on different methods that are applied in various data bases. One of the most important models is the access control model. In this paper, the access control models for XML documents have been investigated and compared.