Keywords: geometric nonlinearity, sag effect, equivalent modulus of elasticity, vehicle - bridge interaction.关键词: 几何非线性 、 中垂效应 、 等效弹性系数 、 车桥互制.The eigenfrequency of oscillation cavity is the function of cavity's geo...
Geometric designs were popular wall decorations in the 14th century.14世纪，几何图形是风靡一时的墙壁装饰图案。Many pictures have been based on simple geometric designs.许多画都是基于简单的几何图案。These results parallel Archimedes'geometric theorems...
Yet Kissinger succeeded in defying an old Washington dictum that you can have in the capital visibility or influence, but not both.在华盛顿有一条传统格言:要么抛头露面,要么得势弄权, 二者不可兼得. 基辛格却公然蔑视这种传统.Under the glare of the street lamps, visi...
采购产品肥皂泡沫浴缸, 淋浴房,凝胶剂, 洗发水, 身体洗剂, 礼品套装, 浴室配件.Soaps Bubble Bath, Shower Gel, Shampoo, Body Lotion, Gift Sets, Bathroom Accessories.目的: 制备青藤碱凝胶剂,研究其透皮渗透性能.Objective : To prepare sinomenine gel and study its skin penetration ...