In search of many social and economical systems,it is found that node strength distribution as well as degree distribution demonstrate the behavior of power-law with droop-head and heavy-taft.

Regarding Skatebowl mill,this article analyses the bowing phenomena caused by the stretch of sliding block and the forcebearing conditions of cross skateseat and sliding block,and set forth some effictive ways of eliminating bowing phenomena.

Aim: To verify the hypothesis that repeated body position change training can improve human head-down tilt(HDT) tolerance.

AIM: To observe the effects of simulated weightlessness induced by 21 d, -20° head-down tilt (HDT) on the cerebral water content and histological changes in rabbits.

Effect of head hypothermia on serum inflammatory cytokines levels in patients with hypertensive intracerebral hemorrhage;

Objective: To explore the optimal time duration of head hypothermia for large-acreage cerebral infarction (LCI) patients with central high fever.

For the characteristics of the low water head,large discharge per unit,low Froude Saige Hydropower Station posses,and the energy dissipation of discharge flood stands out.

The dispatching principle of the outlet sluice of low water head junction is analyzed and determined and the dispatching control conditions of the outlet sluice of Zhuzhou navigation power junction located in the branching channel are put forward.

Through a model test for Qihe river inverted siphon system, aeration problem and air hole place for a low water head and great flow rate inverted siphon system were studied.

Optimum selection of water turbine generator units with ultra-low head;