نتایج جستجو برای: elevator

تعداد نتایج: 1935  

Journal: :Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India 2011
R Raman Rahmat Omar

An instrument has been designed to combine a suction and an elevator for use in ear surgery.

2000
M. N. A. CHOWDHURY M. A.U. PATWARI M. M. ISLAM

A project work was done within the time frame of January to December 2004 in Islamic University of Technology, Gazipur, Bangladesh. The main objective of this work is to design a Flexible Material Handling System (FMS) that can automatically synchronize its speed as per requirement. The system is designed for two types of conveyor system where the speed of the horizontal conveyor belt will be r...

2013
BENJAMIN HILLER TORSTEN KLUG ANDREAS TUCHSCHERER Benjamin Hiller Torsten Klug Andreas Tuchscherer

The task of an elevator control is to schedule the elevators of a group such that small waiting and travel times for the passengers are obtained. We present an exact reoptimization algorithm for this problem. A reoptimization algorithm computes a new schedule for the elevator group each time a new passenger arrives. Our algorithm uses column generation techniques and is, to the best of our know...

2010
Jeffrey J. Dickeson Armando A. Rodriguez Srikanth Sridharan Akshay Korad

Within this paper, control-relevant vehicle design concepts are examined using a widely used 3 DOF (plus flexibility) nonlinear model for the longitudinal dynamics of a generic carrot-shaped scramjet powered hypersonic vehicle. The impact of elevator size and placement on control-relevant static properties (e.g. level-flight trimmable region, trim controls, AOA, thrust margin) and dynamic prope...

Journal: :The Ulster Medical Journal 1965
H. C. Dales E. E. Stevenson

2003
Daniel Nikovski Matthew Brand

We present an efficient algorithm for exact calculation and minimization of expected waiting times of all passengers using a bank of elevators. The dynamics of the system are represented by a discrete-state Markov chain embedded in the continuous phase-space diagram of a moving elevator car. The chain is evaluated efficiently using dynamic programming to compute measures of future system perfor...

2017
Leopoldo Annunziata Marco Menapace Armando Tacchella

Automated design of systems may require modeling and simulating potential solutions in order to search for feasible ones. This process often involves a trade-off between heuristics and computer-intensive approaches. Since neither of the two methods guarantees to always succeed, each problem domain requires a dedicated evaluation. In this paper, the domain of computer-automated design (CautoD) f...

Journal: :IEICE Transactions 2008
Toshiyuki Miyamoto Shingo Yamaguchi

Multi-Car Elevator (MCE) systems, which consist of several independent cars built in the same shaft, are being considered as the elevators of the next generation. In this paper, we present MceSim, a simulator of MCE systems. MceSim is an open source software available to the public, and it can be used as a common testbed to evaluate different control methods related to MCE systems. MceSim was u...

Journal: :JCP 2012
Xudong Wang Haichao Feng Baoyu Xu Xiaozhuo Xu

Permanent magnet linear synchronous motor (PMLSM) for rope-less hoist system, which has the advantages of simple structure, small volume, high force, unlimited hoisting height and speed, is a research focus and difficulties in the vertical hoist field. In this paper, according to the key technical problems of PMLSM for rope-less hoist system, a design scheme of direct driving high-speed elevato...

Journal: :Fire Science and Engineering 2022

The pressure difference due to the piston effect and smoke control system was analyzed via superposition principle. Experiments were conducted in a high-rise building (64.6 m). A general quadrature model used analyze superposition. results indicated that average value of constant -1.6 standard deviation 0.93. between elevator lobby corridors varied based on position, operating direction, time e...

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