مجله اینترنتی دیتاسرا
امروز یکشنبه ۲۴ تیر ۱۳۹۷

به سوی پایگاه داده چندگانه (اشتراکی) انعطاف پذیر و مستقل
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Abstract The success of cloud computing as a platform for deploying webapplications has led to a deluge of applications characterized by small data footprints with unpredictable access patterns. A scalable multitenant database management system (DBMS) is therefore an important component of the software stack for platforms supporting these applications. Elastic load balancing and efficient database migration techniques are key requirements for ... [ ادامه مطلب ]

انتشارات: ACM
پرداخت و دانلود قیمت: 7000 تومان

رویکردی در ارتباط با معماری خط تولید سرویسگرا
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Abstract Service-Oriented Architecture (SOA) has appeared as an emergent approach for developing distributed applications as a set of self-contained and business-aligned services. SOA aids solving integration and interoperability problems and provides a better Information Technology (IT) and business alignment, giving more flexibility for the enterprises. However, SOA does not provide support for high customization and systematic planned reuse to develop applications ... [ ادامه مطلب ]

پرداخت و دانلود قیمت: 8000 تومان

ظرفیت شبکه های بی سیم
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Abstract When n identical randomly located nodes, each capable of transmitting at W bits per second and using a fixed range, form a wireless network, the throughput (formula) obtainable by each node for a randomly chosen destination is (formula) bits per second under a noninterference protocol. If the nodes are optimally placed in a disk of unit area, traffic patterns are ... [ ادامه مطلب ]

انتشارات: IEEE
پرداخت و دانلود قیمت: 17000 تومان

سیستم های صف بندی زمان گسسته با تعطیلی های انحصاری مارکوفب
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Abstract In this contribution we investigate discrete-time queueing systems with vacations. A framework is constructed that allows for studying numerous different vacation systems, including a.o. classical vacation systems like the exhaustive and limited vacation systems as well as queueing systems with service interruptions. Using a probability generating functions approach, we obtain steady-state performance measures such as moments of queue content at ... [ ادامه مطلب ]

مجله: Mathematical and Computer Modelling
انتشارات: Elsevier
پرداخت و دانلود قیمت: 12000 تومان

عوامل تعیین‌کننده در انتخاب نرم‌افزار وب‌محور معنایی در قالب یک سرویس: چارچوبی یکپارچه در شرایط خرید الکترونیکی و برنامه ریزی منابع سرمایه ای
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Abstract The ever increasing Internet bandwidth and the fast changing needs of businesses for effectiveness with the partners in the procurement chain and is leading organizations to adopt information systems infrastructures that are cost effective as well as flexible. The question seems to be: what is driving organizations to go in for Software as a Service (SaaS) based e-procurement and ERP, ... [ ادامه مطلب ]

مجله: Computers in Industry
انتشارات: Elsevier
پرداخت و دانلود قیمت: 10000 تومان

طراحی و تحلیل یک مدل وقفه (تعطیلی) برای سیستم صف بندی دو فازه با خدمات ورودی
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Abstract This paper mainly deals with a two phase service queueing model with gated service vacation. In this gated service vacation model, only those customers who are present in the queue when the server starts a batch mode service are taken into the batch. We have derived probability generating functions of the system size and the orbit size. We have investigated ... [ ادامه مطلب ]

مجله: Procedia Computer Science
انتشارات: Elsevier
پرداخت و دانلود قیمت: 9000 تومان

به اشتراک گذاری طیف مشارکتی بین شبکه های تلفن همراه و اد هاک
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Abstract Spectrum sharing between cellular and ad-hoc networks is studied in this work. Weak signals and strong interferences at the cell-edge area usually cause severe performance degradation. To improve the cell-edge users’ performance quality while keeping high spectrum efficiency, in this paper, we propose a cooperative spectrum sharing scheme. In the proposed scheme, the ad-hoc users can actively employ cooperative diversity ... [ ادامه مطلب ]

انتشارات: IEEE
پرداخت و دانلود قیمت: 15000 تومان

مقایسه پروتکل های مسیر یابی تک مسیره در مقابل پروتکل های مسیر یابی چندگانه برای انتقال تصویر در شبکه های حسگر بی سیم چند رسانه ای
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Abstract Wireless multimedia sensor network (WMSN) applications require strong multimedia communication competence. Therefore, in WMSN applications, it is necessary to use specific mechanisms in order to handle multimedia communication challenges and address desired energy efficiency and reliability goals. Nevertheless, the existing communication protocols are not suitable for the communication challenges and the desired goals. In this respect, specific mechanisms for prioritization, ... [ ادامه مطلب ]

مجله: Ad Hoc Networks
انتشارات: Elsevier
پرداخت و دانلود قیمت: 11000 تومان

هوش کسب و کار به روش محاسبه ابری
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Abstract Business Intelligence (BI) deals with integrated approaches to management support. Currently, there are constraints to BI adoption and a new era of analytic data management for business intelligence these constraints are the integrated infrastructures that are subject to BI have become complex, costly, and inflexible, the effort required consolidating and cleansing enterprise data and Performance impact on existing infrastructure 1 ... [ ادامه مطلب ]

انتشارات: IEEE
پرداخت و دانلود قیمت: 8000 تومان

مدل احتمال جدید برای ضمانت کردن مشکل مسیر بحرانی با الگوریتم اکتشافی
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Abstract In order to obtain an adequate description of risk aversion for insuring critical path problem, this paper develops a new class of two-stage minimum risk problems. The first-stage objective function is to minimize the probability of total costs exceeding a predetermined threshold value, while the second-stage objective function is to maximize the insured task durations. For general task duration distributions, ... [ ادامه مطلب ]

مجله: Neurocomputing
انتشارات: Elsevier
پرداخت و دانلود قیمت: 9000 تومان

یک مدل اصلاح شده صف بندی تخلیه و کاربرد آن در مکانیزم صرفه جویی در برق دریافتی منقطع در شبکه های تکاملی بلند مدت نا معتبر
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Abstract In this paper, Discontinuous Reception, a power saving mechanism in Long Term Evolution wireless networks, is analytically investigated in the presence of transient faults by using an unreliable M/G/1 queue with multiple vacations. System failures may occur either due to transient faults in the mobile device or due to wireless link errors. When a failure occurs, the device may request ... [ ادامه مطلب ]

مجله: Performance Evaluation
انتشارات: Elsevier
پرداخت و دانلود قیمت: 19000 تومان

زیگبی: مشخصه ای برای مجموعه ای از پروتکل های ارتباطی سطح بالا
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Abstract ZigBee is a specification for a suite of high level communication protocols using small, low-power digital radios based on an IEEE 802 standard for personal area networks. Applications include wireless light switches, electrical meters with in-home-displays, and other consumer and industrial equipment that requires short-range wireless transfer of data at relatively low rates. The technology defined by the ZigBee specification ... [ ادامه مطلب ]

انتشارات: Wikipedia
پرداخت و دانلود قیمت: 14000 تومان

پیش بینی ثبت وقایع جداول IP (IPTABLES)
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چکیده فارسی پیش بینی داده های امنیتی به طور فزاینده ای در محیط تهدید آمیز امروزی اینترنت آزاد مهم می باشد. سیستم تشخیص نفوذ شکل تجهیزات امنیتی تا فایروال ها- مقدار زیادی از داده های مربوط به حوادث را ایجاد کرده زیرا ان ها در ارتباط با حملاتی از گوشه و کنار جهان می باشند. درک این مجموعه عظیم داده ها ... [ ادامه مطلب ]

پرداخت و دانلود قیمت: 18000 تومان

سکوی آزمایش مجازی برای ارزیابی محیط داخلی کابین خودرو
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Abstract In the paper the authors refer to a new computational tool for the transient prediction of the car cabin environment and heat load during real operating conditions. The aim of the Virtual Testing Stand software is to support an early stage of the HVAC design process to predict demands for the heating and cooling for various operational conditions and types ... [ ادامه مطلب ]

مجله: Advances in Engineering Software
انتشارات: Elsevier
پرداخت و دانلود قیمت: 12000 تومان

قرار گرفتن در مسیر معماری شبکه پروتکل کنترل نقل و انتقال- پروتکل اینترنتی شناختی
فايل پيوست

Abstract The principal aim of cognitive networking is to equip traditional networks with some sort of intelligence, in order to make them evolve and achieve higher levels of performance than those that can currently be achieved [1]. Typical characteristics of cognitive networks are the ability to monitor the environment they are deployed in, to take reasoned actions based on current conditions ... [ ادامه مطلب ]

پرداخت و دانلود قیمت: 1200 تومان

مدل زبانی پیگیری تاپیک (موضوع) برای تشخیص گفتار
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Abstract In a real environment, acoustic and language features often vary depending on the speakers, speaking styles and topic changes. To accommodate these changes, speech recognition approaches that include the incremental tracking of changing environments have attracted attention. This paper proposes a topic tracking language model that can adaptively track changes in topics based on current text information and previously estimated ... [ ادامه مطلب ]

مجله: Computer Speech and Language
انتشارات: Elsevier
پرداخت و دانلود قیمت: 24000 تومان

مسئله مکان یابی تجهیزات ساده: بررسی و ادغام
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Abstract With emphasis on the simple plant location problem, (SPLP), we consider an important family of discrete, deterministic, single-criterion, NP-hard, and widely applicable optimization problems. The introductory discussion on problem formulation aspects is followed by the establishment of relationships between SPLP and set packing, set covering and set partitioning problems which all are among those structures in integer programming having the ... [ ادامه مطلب ]

مجله: European Journal of Operational Research
انتشارات: Elsevier
پرداخت و دانلود قیمت: 17000 تومان

پروتکل کنترل نقل و انتقالات با پیمایش تطبیقی گذرگاه برای شبکه های بی سیم چند گره ای با ارتباط اینترنتی
فايل پيوست

Abstract This paper introduces an effective congestion control pacing scheme for TCP over multihop wireless networks with Internet connectivity. The pacing scheme is implemented at the wireless TCP sender as well as at the Internet gateway, and reacts according to the direction of TCP flows running across the wireless network and the Internet. Moreover, we analyze the causes for the unfairness ... [ ادامه مطلب ]

مجله: Computer Networks
انتشارات: Elsevier
پرداخت و دانلود قیمت: 18000 تومان

توانمندسازی نرم افزار برای معماری های چند هسته ای
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Abstract A recent trend of transitioning to multicore architectures in the mainstream market segments creates significant challenges for programming systems. The market need for creating portable multithreaded applications that exploit high performance of chip multiprocessors is not easily supported by existing programming models and languages, compiler technology, performance analysis and testing tools. We overview various research directions in this area and ... [ ادامه مطلب ]

پرداخت و دانلود قیمت: 9000 تومان

آگاهی از شرایط به عنوان روش اندازه گیری عملکرد در فعالیت مشترک امنیت سایبری
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Abstract Cyber defense competitions arising from U.S. service academy exercises offer a platform for collecting data that can inform research that ranges from characterizing the ideal cyber warrior to describing behaviors during certain challenging cyber defense situations. This knowledge in turn could lead to better preparation of cyber defenders in both military and civilian settings. We conducted proof-of-concept experimentation to collect ... [ ادامه مطلب ]

مجله: Eighth International Conference on Information Technology
پرداخت و دانلود قیمت: 9000 تومان

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