حجت الله حمیدی
استادیار، گروه فنآوری اطلاعات، دانشکده مهندسی صنایع، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران
[ 1 ] - سامانه اشتراک دوچرخه تهران: ارائه رویکردی مناسب جهت ایجاد جایگاه های اشتراک دوچرخه هوشمند
امروزه توزیع دوچرخه به یکی از مقوله‌های رو به رشدو قابل‌توجه در حوزه حمل‌ونقل، در بیش از 800 شهر جهان تبدیل شده است.بسیاری از تحلیلگران پیش‌بینی کرده‌اند که آمار صدمات پس از استفاده و اجرای سامانه توزیع دوچرخه روند افزایشی خواهد داشت، ولی پژوهش‌های تجربی در این حوزه نشان می‌دهد که درصورت اجرای درست این سامانه، روند افزایشی مجروحیت‌ها و صدمات ناشی از استفاده از سامانه توزیع دوچرخه کاهش خواه...
[ 2 ] - بهینهسازی پایگاه قوانین سیستم فازی نوع TSK با استفاده از الگوریتمهای ترکیبی فراابتکاری
یکی از چالشهای اصلی در استفاده از سیستمهای فازی، چگونگی طراحی پایگاه قواعد فازی با پارامترهای بهینه‌سازی‌شده است؛ به‌نحوی‌که منجر به عملکرد رضایت‌بخش سیستم شود. در این مقاله از روش آموزش ترکیبی تکامل تفاضلی مبتنی بر تضاد(ODE) و بهینهسازی انبوه ذرات (PSO) به‌منظور بهینهسازی پارامترهای توابع عضویت گوسی پایگاه قواعد در سیستم فازی نوع تاکاگی – سوگنو - کانگ (TSK) استفاده شده است. همچنین از الگ...
[ 3 ] - ارائه رویکردی مبتنی بر منطق فازی برای ارزیابی میزان رضایت مشتری
در این مقاله، رویکردی منطبق بر منطق فازی جهت ارزیابی میزان رضایت مشتری ارائه شده و شاخصهای رضایتمندی نیز مورد بررسی قرار گرفته است. احتمال موفقیت یکئ سازمان در بازار به شدت به سطح رضایت مشتری، بستگی دارد. برای بهبود عملکرد رضایتمندی مشتری در کسب و کار، یک روشِ ارزیابی عملکرد مدیریت ارتباط با مشتری، بر اساس ارزیابی فازی می باشد. به همین منظور جهت افزایش نرخ موفقیت در اجرای سیستمهای مدیریت ار...
[ 4 ] - An Approach to Management of Health Care and Medical Diagnosis Using of a Hybrid Disease Diagnosis System
Introduction: In order to simplify the information exchange within the medical diagnosis process, a collaborative software agent’s framework is presented. The purpose of the framework is to allow the automated information exchange between different medicine specialists. Methods: This study presented architecture of a hybrid disease diagnosis system. The architecture employed a learning...
[ 5 ] - A New Hybrid Method for Improving the Performance of Myocardial Infarction Prediction
Abstract Introduction: Myocardial Infarction, also known as heart attack, normally occurs due to such causes as smoking, family history, diabetes, and so on. It is recognized as one of the leading causes of death in the world. Therefore, the present study aimed to evaluate the performance of classification models in order to predict Myocardial Infarction, using a feature selection method tha...
[ 6 ] - ارائه یک رویکرد همانند سازی شده عامل محور در اجرای یک الگوی کد متحرک مطمئن
Abstract Using mobile agents, it is possible to bring the code close to the resources, which is not foreseen by the traditional client/server paradigm. Compared to the client/server computing paradigm, the greater flexibility of the mobile agent paradigm comes at additional costs as well as the additional complexity of developing and managing mobile agent-based applications. Such complexity ...
[ 7 ] - A Fuzzy Decision Making Approach to Enterprise Resource Planning System Selection
Here, we propose a fuzzy analytic hierarchy process (FAHP) method to evaluate the alternatives of enterprise resource planning (ERP) system. The fuzzy AHP approach allows the users get values more accurately to model the vagueness which changes according subjective ideas in the decision-making environment for ERP system selection problem. Therefore, fuzzy AHP method is used to obtain firm decis...
[ 8 ] - An Approach to Increasing Reliability Using Syndrome Extension
Computational errors in numerical data processing may be detected efficiently by using parity values associated with real number codes, even when inherent round off errors are allowed in addition to failure disruptions. This paper examines correcting turbo codes by straightforward application of an algorithm derived for finite-field codes, modified to operate over any field. There are syndromes...
[ 9 ] - رویکردی برای حفاظت از عملیات های پردازش داده در سیستم های محاسباتی با استفاده از کدهای کانولوشن
Abstract We present a framework for algorithm-based fault tolerance methods in the design of fault tolerant computing systems. The ABFT error detection technique relies on the comparison of parity values computed in two ways. The parallel processing of input parity values produce output parity values comparable with parity values regenerated from the original processed outputs. Number data proc...
[ 10 ] - ارائه رویکردی برای مدیریت تشخیص سریع برخط با استفاده از فناوری بیومتریک در اینترنت اشیا
Internet of Things (IOT) is a newly developed concept in the world of technology and communication which provides the ability to transfer technological information to everything, including human, animals, or objects, through communication networks such as internet or intranet. Biometric technology offers various applications. The main objective is to provide an appropriate alternative for contr...
[ 11 ] - ارائه رویکردی برای مدیریت و سازمان‌دهی اسناد متنی با استفاده از تجزیه‌وتحلیل هوشمند متن
Regarding the fact that stored data occupies a large space in organizations and retention systems and information management that has been resulted in gigantic data warehouses, the need for extracting an appropriate model is felt increasingly. Text mining is one of the most significant methods for extracting a useful and appropriate model that helps organizations in achieving their goals throug...
[ 12 ] - بررسی معماری و چالش های رایانش ابری خودرویی
رایانش ابری خودرویی یک راه حل امیدوار کننده برای بهره برداری از منابع کم استفاده خودروها از جمله قدرت پردازشی، فضای ذخیره سازی، اتصال اینترنت و غیره است. این منابع می‌تواند میان خودروها به اشتراک گذاشته شود یا توسط مالکین اجاره داد شود تا برای مصارف مختلفی مثل رفع نیاز سخت افزاری سرویس‌ها و اپلیکیشن‌های شبکه خودرویی مورد استفاده قرار گیرند. در واقع می‌‌توان از این طریق به نیاز رو به افزایش برا...
[ 13 ] - Analysis and Evaluation of Privacy Protection Behavior and Information Disclosure Concerns in Online Social Networks
Online Social Networks (OSN) becomes the largest infrastructure for social interactions like: making relationship, sharing personal experiences and service delivery. Nowadays social networks have been widely welcomed by people. Most of the researches about managing privacy protection within social networks sites (SNS), observes users as owner of their information. However, individuals cannot co...
[ 14 ] - Designing and Modeling a Control System for Aircraft in the Presence of Wind Disturbance (TECHNICAL NOTE)
This paper proposes a switching adaptive control for trajectory tracking of unmanned aircraft systems. The switching adaptive control method is designed to overcome the wind disturbance and achieve a proper tracking performance for control systems. In the suggested system, the wind disturbance is regarded as a finite set of uncertainties; a controller is designed for each uncertainty, and a per...
[ 15 ] - An Architecture for Security and Protection of Big Data
The issue of online privacy and security is a challenging subject, as it concerns the privacy of data that are increasingly more accessible via the internet. In other words, people who intend to access the private information of other users can do so more efficiently over the internet. This study is an attempt to address the privacy issue of distributed big data in the context of cloud computin...
[ 16 ] - An Efficient Predictive Model for Probability of Genetic Diseases Transmission Using a Combined Model
In this article, a new combined approach of a decision tree and clustering is presented to predict the transmission of genetic diseases. In this article, the performance of these algorithms is compared for more accurate prediction of disease transmission under the same condition and based on a series of measures like the positive predictive value, negative predictive value, accuracy, sensitivit...
[ 17 ] - Improvement of Navigation Accuracy using Tightly Coupled Kalman Filter
In this paper, a mechanism is designed for integration of inertial navigation system information (INS) and global positioning system information (GPS). In this type of system a series of mathematical and filtering algorithms with Tightly Coupled techniques with several objectives such as application of integrated navigation algorithms, precise calculation of flying object position, speed and at...
[ 18 ] - Analysis of Pre-processing and Post-processing Methods and Using Data Mining to Diagnose Heart Diseases
Today, a great deal of data is generated in the medical field. Acquiring useful knowledge from this raw data requires data processing and detection of meaningful patterns and this objective can be achieved through data mining. Using data mining to diagnose and prognose heart diseases has become one of the areas of interest for researchers in recent years. In this study, the literature on the ap...
[ 19 ] - Using a Data Mining Tool and FP-Growth Algorithm Application for Extraction of the Rules in two Different Dataset (TECHNICAL NOTE)
In this paper, we want to improve association rules in order to be used in recommenders. Recommender systems present a method to create the personalized offers. One of the most important types of recommender systems is the collaborative filtering that deals with data mining in user information and offering them the appropriate item. Among the data mining methods, finding frequent item sets and ...
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