目的:探究太极拳对60-70岁的中老年人身体机能的影响。方法:以北京市海淀区60-70岁的健康中老年74人为研究对象,分别对研究对象的肺功能、布兰奇心功能指数和30秒30次蹲起进
Polysulfone (PSF) is extensively used for the production of ultrafiltration (UF) membranes thanks to its high strength,chemical stability,and good processibilit
Pyrolysis and heat transfer characteristics of single large biomass particle were investigated using three-dimensional unsteady heat transfer model coupled with
Porous materials with selective wettability and permeability have significant importance in oil-water separation,but complex fabrication processes are typically
The shale gas is an unconventional supplementary energy to traditional fossil energy,and is stored in layered rocks with low permeability and porosity,which lea
Chemical looping gasification (CLG) of Ningdong coal by using Fe2O3 as the oxygen carriers (OCs) was studied,and the gasification characteristics were obtained.
以一种超高强钢为研究对象,对其进行了热力学计算分析和热模拟压下实验,采用金相组织和扫描形貌分析等手段,研究了压下变形参数对超高强钢再结晶的影响规律。研究结果表明:变
25年前,中国城市规划学会在无锡开年会,会上成立了一个二级组织叫城市更新学术委员会。专家们当时提出,城市更新不是简单的房屋拆迁或改造,而是对原有城市或城市中某些地区的机能加以提高、用地结构加以调整、环境质量加以改善、建筑物构筑物等物质设施加以改造,使之适应当今社会发展的需要。同时呼吁"政府要加强对城市更新改造的统筹管理"。
This paper reports an efficient method of preparing porous polymeric microspheres by solvent evaporation in foam phase,in which phase separation between polymer
A low-cost porous ceramic support was prepared from low-grade palygorskite clay (LPGS) and silicon carbide (SiC) with vanadium pentoxide (V2O5) additives by a d