Introduction: The mechanical properties of joints have a significant impact on the dynamic response transmission tower structures. Methods: Considering bolt slip, numerical model K-joint is established. K-joints are studied from three aspects: failure mode, load-displacement hysteretic curve, and stiffness degradation by method. effects preload, friction coefficient, member strength analyzed. R...

Aerodynamic roughness length 0 ) and displacement height 0 ) are important surface parameters for estimating surface fluxes in numerical models. These parameters are generally determined from wind flow characteristics using logarithmic wind profiles measured at a meteorological tower or by balloon release. It would be an advantage to use measurements of land surface characteristics instead of w...

Folded monopole antennas have been used for many years in medium frequency amplitude modulation broadcast applications. These antennas offer a grounded radiating structure with a height approximating a quarter wavelength. Folded monopoles have been studied exhaustively during a recent effort in an attempt to characterize the input impedance and directivity characteristics as a function of monop...

BACKGROUND The Towers of London (TOL) and Hanoi (TOH) have been viewed as equivalent measures of planning and/or problem solving, although recent evidence in adults suggests that the underlying measurement characteristics of these two tasks may differ. As tower tasks are one of the few instruments that can be used to assess executive functioning in young children, the cognitive demands for both...

A single–phase flow model was used to analyze the uniformity of field in desulfurization tower under different baffle combinations, and a multiphase explain gas solid two–phase characteristics chemical reaction tower. The stability behavior solids one furnace two towers discussed. results show that installation shielding plates at appropriate positions for sulfur removal is beneficial enhance u...

For a developing country with monument, how to balance urban development and historical buildings protection in the process of urbanization is key issue worthy exploration. Xi’an Bell Tower, located city, Shaanxi province, China, representative Chinese historic buildings. Aiming at investigating public’s visual impact assessment this building as well its surrounding landscapes, study chose one ...

Design of a natural dry cooling tower has been accomplished in two sections: the design of heat exchangers and the numerical solution of flow through the tower. Heat exchanger (Heller type) has been simulated thermodynamically and then coupled with a computer program, which calculated the turbulent natural convection flow through the tower. The computer program developed for this purpose can be...

The Cooling Tower Energy & Operating Cost Analysis Software is an in-house program developed by Tower Tech and is used to design and evaluate the performance and life-cycle costs associated with a cooling tower. This version can be used to estimate the cost to purchase and operate a Tower Tech cooling tower and a competitor’s tower. A number of assumptions about the details of the competitor’s ...

in a steam power plant, the temperature of the cooling water leaving the condenser for recyclingshould decrease. this is achieved in a cooling tower. the heller cooling tower does not require waterfor operation, thus, it is a suitable system for use in thermal power plants throughout iran. wind is anenvironmental factor that unfavorably affects the performance of a cooling tower. previous studi...