理念转变与党的执政能力提升

执政能力是一种流动的政治资源,其流向从根本上取决于对静态的执政资源的占有和开发。由传统的政治理念向治理理念转变,是现代政治学高度关注的一个问题,它与党的执政能力存在着深刻的内在联系。执政资源能否得到最大限度的开发,执政理念能否得到真正的践行,关键在于执政党组织系统的开放程度及其制度化水平,这也是实现党的执政能力增量发展以及执政效能质化提升的基本进路。

Prediction of Core-Annulus Solids Mass Transfer Coefficient in Gas-Solid Fluidized Bed Risers

Based on analysis of energy dissipation in the core region of gas-solid fluidized bed risers, a simplified model for determination of core-annulus solids mass transfer coefficient was developed according to turbulent diffusion mechanism of particles. The simulation results are consistent with published experimental data. Core-annulus solids mass transfer coefficient decreases with increasing particle size, particle density and solids circulation rate,but generally increases with increasing superficial gas velocity and riser diameter. In the upper dilute region of gas-solid fluidized bed risers, core-annulus solids mass transfer coefficient was found to change little with the axial coordinate in the bed.