Planning and Layout Strategies of Urban Institution Pension Service Facilities under the Background of Aging Society: A Case Study of the Main Urban District of Xuzhou City

China has entered an aging society, and the contradiction between the social pension needs rapidly growing in the dty and the lagged pension business is increasingly outstanding. By analyzing the amount, development level, type, sttucture, and space distribution of the institutional pension facilityin main urban district of Xuzhou Qty, this paper has summed up the main problems. Combining the estimation on the number of the elders and pension bed, coordination and planning of institutionalpension facility in the research zone are conducted from three aspects： distribution guidance, ptindple of locating and differentiation configufation, to promote tiie construction of pension agenqr and impel the development of pension business in Xuzhou Qty.

Optimal Exit Layout Strategy for Crowd Safety Evacuation in a Ramp Domain

Pedestrian behavior modeling plays a considerably important role in improving operational efficiency and safety of pedestrian infrastructure.In this paper,we first propose a cost potential field cellular automata model that simulates crowd evacuation dynamics on a ramp with two exits.In the model,each pedestrian navigates according to the cost potential field in the ramp domain.Evacuation behaviors of pedestrians are investigated with respect to the ramp angle and the layout of the exits.An aggregated pushing force field is introduced to capture the effects of pushing interactions among pedestrians under congested situations.The phenomenon of pedestrians’falling down is modeled and demonstrated under various scenarios with different exit layouts and ramp angles.Numerical results show that an optimal layout strategy is to set the two exits in the center of the bottom and the top of the ramp,respectively.This typical exit layout design could effectively prevent and/or reduce crowd injury caused by the domino effect of pedestrians falling down in a stampede.

Smart load control of the large-scale offshore wind turbine blades subject to wake effect

The smart fatigue load control of a large-scale wind turbine blade subject to wake effect was numerically investigated in this paper. The performances were evaluated and compared at selected typical wind speeds within the whole operational region under three turbine layout strategies, i.e., column, row and array arrangements, together with a single turbine case as reference, utilizing our newly developed aero-servo-elastic platform. It was observed that not only the blade fatigue loads but the stabilities of power and collective pitch angle were effectively controlled for all cases, especially at the highest studied hub velocity of20 m/s, leading to the averaged reduction percentages in the standard deviations of the flapwise root moment, the flapwise tip deflection and the root damage equivalent load, of about 30.0 %, 20.0 % and 20.0 %, respectively. Furthermore, the control effectiveness gradually lessened in the sequences of single, column, row and array cases, with successively increasing effective turbulence intensity,within regions II and III. The performances in region III,associated with the impaired flow separation on the blade by the effective pitching action, were much better than those in region II, related to enhanced flow detachment. In addition,at the rated wind velocity, the control for the array case was superior over other three cases, which was thought to be originated from the more pitch activities to impair the uncontrolled flow separation on the blade surface.