In this paper, the generation way of three-direction grid prestressed reticulated mega- structure is studied, and mega-structure composite joint specific formation ideas are proposed. The important control parameters determined, geometric modelling method hexagon across middle octagon side Coordinate formula hexagonal octagonal joints derived to ensure reasonable arrangement uniform stre...

This paper proposes a novel straight-side U-shaped steel-encased concrete composite beam (SUSCCB). The SUSCCB is constituted by encasing the top sections of steel plates directly into flange, with action generated through perfobond connections consisting reinforcement bars transversely passing perforations in encased plates. It engineered to overcome shortcomings existing varus or valgus beams ...

In this paper a geometric approach is suggested to ®nd the closest approximation to Euclidean metric based on geometric measures of the digital circles in 2D and the digital spheres in 3D for the generalized octagonal distances. First we show that the vertices of the digital circles (spheres) for octagonal distances can be suitably approximated as a function of the number of neighborhood types ...

Environmental pollution problems have been globally main concern in all fields including economy, society and culture into the 21 century. Beginning with the Kyoto Protocol, the reduction on the emissions of greenhouse gas such as CO2 and SOX has been a principal challenge of our day. As most buildings unlike durable goods in other industries have a characteristic and long life cycle, they cons...

Environmental pollution problems have been globally main concern in all fields including economy, society and culture into the 21 century. Beginning with the Kyoto Protocol, the reduction on the emissions of greenhouse gas such as CO2 and SOX has been a principal challenge of our day. As most buildings unlike durable goods in other industries have a characteristic and long life cycle, they cons...

Environmental pollution problems have been globally main concern in all fields including economy, society and culture into the 21 century. Beginning with the Kyoto Protocol, the reduction on the emissions of greenhouse gas such as CO2 and SOX has been a principal challenge of our day. As most buildings unlike durable goods in other industries have a characteristic and long life cycle, they cons...

In this study, a direction-finding array antenna with an improved front-to-back ratio was developed by inserting meander slots into the ground plane of electrically small antenna. The proposed slot structure improves capabilities while maintaining compact overall size is 58 mm×58 mm×40 mm, each element measuring 40 mm×22 mm×1.6 mm. consists eight elements attached to vertical column, forming oc...