نتایج جستجو برای: crane

تعداد نتایج: 3386  

2004
BIRGIT VENNESLAND

4. CRANE, F. L., LESTER, R. L., WIDMER, C. and HATEFI, Y. Studies on the electron transport system XVIII. Isolation of coenzyme Q from beef heart and beef heart mitochondria. Biochim. Biophys. Acta 32: 73-79. 1959. 5. CRANE, F. L., WIDMER, C., LESTER, R. L. and HATEFI, Y. Studies on the electron transport system XV. Coenzyme Q (Q275) and the succinoxidase activity of the electron transport part...

2008

Satisfactory real time control of the overhead crane facilitating fast transit (< 3s) and minimal swing (< 4°) was achieved in the x, y and z directions. Control was achieved in each individual direction using experimental modelling techniques, careful sampling frequency selection, NMSS representation and LQR controller design. To overcome non-linear model variation, a gain scheduling algorithm...

2014
Dexing Zhong Hongqiang Lv Jiuqiang Han Quanrui Wei

The so-called Internet of Things (IoT) has attracted increasing attention in the field of computer and information science. In this paper, a specific application of IoT, named Safety Management System for Tower Crane Groups (SMS-TC), is proposed for use in the construction industry field. The operating status of each tower crane was detected by a set of customized sensors, including horizontal ...

2012
M. A. Ahmad Raja Ismail M. S. Ramli

This paper presents investigations into the development of hybrid control schemes for input tracking and anti-sway control of a gantry crane system. A nonlinear overhead gantry crane system is considered and the dynamic model of the system is derived using the Euler-Lagrange formulation. To study the effectiveness of the controllers, an LQR control is developed for cart position control of a ga...

2008
Nicholas G. Dagalakis James S. Albus Roger V. Bostelman John Fiala

An inexpensive and easy to operate controller has been developed for the teleoperation control of the NIST Robot Crane. This robot crane has the Stewart platform parallel link manipulator design, with cables as parallel links and winches as actuators. The controller is currently capable of rate-position control and force control of the crane platform. The control action can take place with resp...

Journal: :Work 2012
Pradip Kumar Ray V K Tewari

The study, carried out at the Batch Annealing Furnace (BAF) shop of Cold Rolling Mill (CRM) at an integrated steel plant of India, concerns ergonomic evaluation and redesign of a manually-operated Electrical Overhead Travelling (EOT) crane cabin. The crane cabin is a complex worksystem consisting of the crane operator and twelve specific machine components embedded in a closed workspace. A cran...

2016
Rinchen Namgay Sangay Wangchuk

Black-necked Crane (Grus nigricollis) is a vulnerable Red list species whose populations are declining. However, little is known about Black-necked Cranes' habitat requirements or the causes of their population decline. We identified Black-necked Cranes' winter roost and foraging preferences of Black-necked Cranes in Bhutan during the winter of 2013-2014. Black-necked Cranes' roosts were record...

2017
Yihai Fang Yong K. Cho

In the construction domain, previous efforts in utilizing Virtual Reality (VR) mainly focused on training and education, pre-planning, and simulation. The understanding of their benefits in real-time applications during the construction phase is scarce. This research presents an approach to leverage VR for real-time sensor data visualization for the monitoring of equipment operations. Two criti...

2011
Zhen Lei Saeed Behzadipour Mohamed Al-Hussein Ulrich Hermann

Crane lift path planning aims to find a collision-free trajectory for the lifted object among on-site obstacles from its pick location to the final location. However, the current manual planning process is time-consuming, prone to errors, and requires the practitioners to have exceptional visual abilities, since the construction site is congested and dynamically changing. Therefore, the need fo...

2001
Hendryk Pfeiffer

The partition function of the SO(4)or Spin(4)-symmetric Euclidean Barrett–Crane model can be understood as a sum over all quantized geometries of a given triangulation of a four-manifold. In the original formulation, the variables of the model are balanced representations of SO(4) which describe the quantized areas of the triangles. We present an exact duality transformation for the full quantu...

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