Bifurcation of periodic motion on frequency in nonlinear vibration mechanism with piece-wise linearity;
分段线性-非线性振动机械周期运动关于ω的分叉
he paper is concerned with the stability of the springless vibrohammer periodic motion with one shock per period.
本文讨论了无弹簧式振动锤锤体在每个运动周期内冲击一次的简单周期运动。
Bifurcation and chaos of periodic motions of a single-degree-of-freedom system with piecewise-linearity is studied.
研究了一类单自由度分段线性系统周期运动的分岔和混沌现象。
Then the Poincaré map of its period motion is established by utilizing the stability theory of system with periodic coefficients.
研究了一类周期系数力学系统因周期运动失稳而产生Hopf-Flip分岔的问题。
To investigate the dynamic stability of a two-degree-of-freedom manipulator as a system,differential equations of motion for this system were established on the basis of the Lagrange equation,and perturbed differential equations with period coefficients were derived for the period motion of this system by applying the perturbance theory.
为了研究两自由度机械手系统的动力学稳定性,基于拉格朗日方程给出了它的运动微分方程,并用扰动理论确定系统周期运动具有周期系数的扰动微分方程;根据F loquet理论对该系统扰动微分方程的平衡点的稳定性进行了分析,并用数值方法研究了平衡点失稳后的倍周期分岔过程。
The Poincar map of the period motion is established following the Floquet theory .
研究了一类周期系数力学系统因周期运动失稳而产生Hopf分岔及混沌问题。
Lessons, New Trends and Enlightenment of National Park Movement;
国家公园运动的教训、趋势及其启示
someone who maintains the grounds (of an estate or park or athletic field).
保管维修（庄园、公园或运动场的）地面的人。
Smith's favourite sport is jogging in the park .
史密斯喜好的运动是在公园里漫步。
The Provisional Regional Council maintains 703 hectares of greenery in parks, gardens, sports grounds, soccer pitches, games areas and children's playgrounds in the New Territories.
临时区域市政局负责管理新界区内各公园、花园、运动
One who maintains grounds, as of an estate, a park, or an athletic field.
场地管理员；看管人负责维护场地，如庄园、公园或运动场场地的人
We might no longer have room for a park or sports ground.
那我们就可能不会有公园或运动场的空间了。
Selecting and Purchasing of the Sculpture Material of Sport Park in City;
城市运动主题公园雕塑材料的选择与采购
The Discussion of the Network Effect in the Landscape Design of Sports Park on the City
论城市运动公园景观设计中的网络效应
THE RISE OF MODERN SPORTS' IMPACT ON CITY PARK MORPHOLOGY
体育运动兴起对近代中国城市公园形态的影响
Students suggested to build a park, mega chessboard, basketball court, sports ground and swimming pool in the area. There will also be a theme park in the roof top.
于区布内建设公园、大型棋盘、篮球场、运动场、泳池等，另于天台上建造主题公园。
56 percent of the athletes in Beijing will compete in the Olympic Green.
在北京，56％的运动员将在奥林匹克公园内参加比赛。
In every city you visit, there are public parks and play areas for picnics, sports, or walks.
你访问的每一个城市都有公园和供人野餐、运动或步行的游乐场所。
It was used to build parks andplaygrounds for the people of the town.
那笔款子是用来为该镇人民修建公园和运动场的。
Ill, The creative idea of building golf culture park and popularizing the golf sport.
(三)建设城市高尔夫文化公园,推广普及高尔夫球运动的新创意等。
MOVEMENT OF SEAS,MELODY OF SPORTS Design of Qinhuangdao Olympic Sports Park
海洋的乐章,运动的旋律——秦皇岛奥林匹克体育公园设计
Kindergarten Movements in American (1856-1920);
幼儿园运动在美国（1856—1920）
Reptile House [Zoological and Botanical Gardens]
香港动植物公园爬虫屋
Livingstone Game Park
利文斯通野生动物公园