该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......

[目的]为黄土高原植被的恢复建设提供科学依据。[方法]采用三因子两水平设计,比较研究了黄土高原15种常见植物种子在冷湿层化、光......

The amplitude and rhythm of temperature changes at inter-decadal and inter-centennial timescale were studied, based on t......