章动

nutation

章动

(见图1,P是黄道面,ZZ'是地球自转轴)下面我们再简单介绍一下地球的另外两种运动--章动(nutation)和极移(polar motion). 章动是与岁差相伴相随的,18世纪时天文学家发现地轴在进动的同时,还在做微小的周期性摆动,其周期为18.6年,

nutate

章动

Numerical analysis, of potential flow. 数值分析,势流. | Nutate, 章动, | Nutating disc meter, 摆盘式流量计,

nutating disc flowmeter

(章动)圆盘流量计

numerical control,数值控制 | nutating disc flowmeter,(章动)圆盘流量计 | nutating flowmeter,章动流量计

numerical value equation

数值方程

numerical value 数值 | numerical value equation 数值方程 | nutation 章动

nutation frequency

章动频率

nutation 章动 | nutation frequency 章动频率 | nutron image intensifier 中子像增强器

nutation frequency

盘旋频率,章动频宰

"章动","nutation" | "盘旋频率,章动频宰","nutation frequency" | "尼龙缆绳","nylon hawser"

obliquity factor

倾斜因子

nutation 章动 | obliquity factor 倾斜因子 | Omega 欧米加

nutating flowmeter

章动流量计

nutating disc flowmeter,(章动)圆盘流量计 | nutating flowmeter,章动流量计 | nutrients,营养盐

nutating disc meter

摆盘式流量计

Nutate, 章动, | Nutating disc meter, 摆盘式流量计, | Oblique shock waves, 斜激波,

nut collar

螺母垫呛

Nuqiost staboout croteropm nut 缧母,缧帽 | nut collar 螺母垫呛 | nutation 章动

longitudinal induced voltage：纵向感应电压

longitudinal impedance 纵向阻抗 | longitudinal induced voltage 纵向感应电压 | longitudinal magnetic field 纵向磁场

refrigerant circuit：冷凍迴路

冷冻剂 refrigerant | 冷冻回路 refrigerant circuit0 | 冷冻活性碳床 refrigerated charcoal bed