نتایج جستجو برای: telecommunication cable

تعداد نتایج: 22093  

Journal: :توسعه کارآفرینی 0
ابوالقاسم عربیون دانشیار، دانشکده کارآفرینی، دانشگاه تهران غلامحسین عبد الله زاده استادیار-دانشگاه علوم کشاورزی و منابع طبیعی گرگان محمد شریف شریف زاده دانشیار-دانشگاه علوم کشاورزی و منابع طبیعی گرگان بهرام رضا امیری دانش آموخته کارشناسی ارشد کارآفرینی-دانشگاه تهران

the aim of this research is to prioritize the key factors for implementation of idea virtual bank (ivb) in telecommunication industry. the current applied and descriptive research was conducted based on a survey. the population of this research consisted of all users of ivb and idea submitters to suggestion system of telecommunication industry in province of razavi-khorasan that 70 of them were...

2003
Javier Antich Alberto Ortiz

Nowadays, the surveillance and inspection of underwater installations, such as power and telecommunication cables and pipelines, is carried out by trained operators who, from the surface, control a Remotely Operated Vehicle (ROV) with cameras mounted over it. This is a tedious, time-consuming and expensive task, prone to errors mainly because of loss of attention or fatigue of the operator and ...

Journal: :European Journal of Operational Research 2000
Olaf E. Flippo Antoon W. J. Kolen Arie M. C. A. Koster Robert L. M. J. van de Leensel

In this paper we consider the local access telecommunication network expansion problem, in which growing demand can be satis®ed by expanding cable capacities and/or installing concentrators in the network. The problem is known to be NP-hard. We prove that the problem is weakly NP-hard, and present a pseudo-polynomial dynamic programming algorithm for the problem, with time complexity O…nB2† and...

Journal: :Híradástechnika 2022

Recently, the issue of monitoring and repairing leakage from cable television networks have re-emerged, particularly after International Telecommunication Union released a part ultra-high frequency spectrum to mobile broadband services. The newly allocated spectrum, known as digital dividend bands, was traditionally used throughout Europe for TV broadcasting. emerging problem is mutual interfer...

Journal: :amirkabir international journal of electrical & electronics engineering 2013
a. zarif loloei h. d. taghirad n. n. kouchmeshky

workspace analysis is one of the most important issues in the robotic parallel manipulator design. ‎however, ‎the unidirectional constraint imposed by cables causes this analysis more challenging in the cabledriven redundant parallel manipulators. controllable workspace is one of the general workspace in the cabledriven redundant parallel manipulators due to the dependency on geometry parameter...

This paper investigates the effect of metallic sheaths on losses and temperature of medium voltage power cables. Two grounding methods of sheaths, including both ends bonding and single point bonding that causes different situations on cable ampacity, are considered. Electrical losses of cables that are main sources of heat are calculated in both conductor and metallic sheath of the cables. She...

Journal: :Nature 1957

Journal: :iranian journal of mechanical engineering transactions of the isme 0
j. hamedi department of mechanical engineering, science and research branch, islamic azad university, tehran, iran h. zohoor distinguished professor and member, center of excellence in design, robotics and automation, school of mechanical engineering, sharif university of technology

modeling and wrench feasible workspace analysis of a spatial cable suspended robots is presented. a six-cable spatial cable robot is used the same as stewart robots. due to slow motion of the robot we suppose the motion as pseudostatic and kinetostatic modeling is performed. various workspaces are defined and the results of simulation are presented on the basis of various workspaces and applied...

ژورنال: علوم آب و خاک 2019

In this study, some experiments were carried out in a rectangular plexiglass flume to study the effect of the cable around a vertical tripod and two piles groups with different angles. In this research, a series of experiments were performed by placing a cylindrical vertical pileand two piles groups with different angles separately in two modes including with cable and without cable. The experi...

There is an increasing need to determine accurately the strength properties of tendons for an effective ground control on mines and underground structures as well as on modelling simulations. The strength properties of cables, used as cable bolts, have been evaluated mainly by their ultimate tensile strength, as this kind of test can be carried out in the field as well as in the laboratory. Onl...

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