查询词典 undulating ground

Thirdly, a new type base isolation system, i. e., slide-limited friction base isolation system is presented in this paper. Based on this system, harmonic and subharmonic periodic response of S-LF subjected to harmonic motion is investigated by using Floquet theory. Dynamic response of sliding structure subjected to earthquake ground motion is calculated with a precise high order direct integration method, and the numerical results are presented in terms of maximum acceleration response spectra of supcrstructure and maximum sliding displacement response spectrum. By comparison with isolating effects of pure-friction base isolation system and resilient-friction base isolation system , it shows that the isolating characteristic of S-LF is superior to P-F and R-FBI. Through analyzing an engineering example, it is observed that the maximum inter-storey shear force and absolute acceleration of sliding structure to earthquake ground motion are very different from those of traditional structures.

提出了一种新型基础隔震模型，即带限位装置的摩擦隔震体系；基于此隔震模型，利用Floquet理论研究地面谐运动下S-LF结构的运动特性；并利用高精度的精细时程积分法，通过对地震作用下S-LF动力响应的计算，绘制了上部结构最大加速度反应谱和基底最大滑移量反应谱，并研究了各种结构参数对隔震的影响；通过与恢复力摩擦隔震系统和纯摩擦力滑移隔震系统的比较表明，S-LF的隔震性能优于P-F和R-FBI；对计算实例的分析发现，地震作用下S-LF结构的层间最大剪力和最大绝对加速度反应分布较一般传统结构有很大区别。

Dynamic response of sliding structure subjected to earthquake ground motion is calculated with a precise high order direct integration method, and the numerical results are presented in terms of maximum acceleration response spectra of supcrstructure and maximum sliding displacement response spectrum. By comparison with isolating effects of pure-friction base isolation system and resilient-friction base isolation system , it shows that the isolating characteristic of S-LF is superior to P-F and R-FBI. Through analyzing an engineering example, it is observed that the maximum inter-storey shear force and absolute acceleration of sliding structure to earthquake ground motion are very different from those of traditional structures.

提出了一种新型基础隔震模型，即带限位装置的摩擦隔震体系；基于此隔震模型，利用Floquet理论研究地面谐运动下S-LF结构的运动特性；并利用高精度的精细时程积分法，通过对地震作用下S-LF动力响应的计算，绘制了上部结构最大加速度反应谱和基底最大滑移量反应谱，并研究了各种结构参数对隔震的影响；通过与恢复力摩擦隔震系统和纯摩擦力滑移隔震系统的比较表明，S-LF的隔震性能优于P-F和R-FBI；对计算实例的分析发现，地震作用下S-LF结构的层间最大剪力和最大绝对加速度反应分布较一般传统结构有很大区别。

By introducing the generating method and the expanding method,a complementary abstract state space can be constructed using the generating method on goal state once and the expanding method several times in turn.They are useful tools for designers to construct the complementary abstract state space in an easy way,where the complementarity of abstract states means that each ground state can only be represented by one abstract state and all the ground states can be represented by all the abstract states.

然后又提出了抽象状态空间的生成方法和扩展方法，从一个准确描述的的目标抽象状态开始，使用一次生成方法和多次扩展方法，可以让设计者很容易的得到一个规模适度的互补抽象状态空间，即每个基本状态只有一个抽象状态来表示，所有的抽象状态又能表示所有的基本状态。

She secretly complain of hard lot in the heart bottom, 21 jerkin, with dad ground the mummy go to cookhouse many meeting choice open spaces ground, for experience of the bush but little and then little.

她在心底里暗暗叫苦，二十一世纪时，与爹地妈咪去野营多会选择空旷之地，对于丛林的经验可是少之又少。

The ground stage mathematical model includs aerodynamics and the counterforce from the ground.

从飞行器的力和力矩角度对直升机进行建模，该模型包括地面阶段数学模型和离地阶段数学模型。

Broad network has two meanings, it is broad firstly, meaning is with capacious mind, included state of mind is right to the person thing, additionally Yi Ke understands the range of broad information platform, deepness and open sex; It is the ground secondly, meaning is go doing each detail with hardheaded spirit, not coxcombical, not coarse, ground of serious deal with concrete matters relating to work goes doing, do one's best is perfect.

阔地网络有两层含义，其一是阔，涵义是以广阔的胸襟，包容的心态对人对事，另外亦可理解阔地信息平台的广度、深度和开放性；其二是地，涵义是以脚踏实地的精神去做好每一个细节，不浮夸，不毛糙，认真务实地去做，力求完美。

The numerical analysis method is used to study the ground movement laws caused by the ovalization variation in the cross section in the action of water and soil pressure of tunnel lining.Based on the stochastic medium theory,this paper suggests the method for calculating this ground movement caused by tunnel ovalization deformation.

采用数值分析方法研究了隧道衬砌在土水压力的作用下，断面所产生的椭圆化变形引起的地层位移规律，并基于随机介质理论，给出了计算隧道椭圆化变形引起地层位移的方法。

On mountainous sites, grade Ⅰ or Ⅱ stands including land below the crown of the secondary broadleaf forest and the Chinese-fir plantation or east-facing, shady dry land could be considered for the plantation. The transmittance of crown in the areas should be 55%~60%. One-year-old high quality seedlings above 25 cm tall and 0.25 cm in diameter near the ground-level should be used. For high-yield, field cultivation, shading facility should be considered and seedlings of taller than 15 cm and greater than 0.15 cm in diameter near the ground should be applied. The appropriate density and sunlight transmittance ought to be 30 cm×30 cm and 50%, respectively.

结果表明，利用山地种植，选择透光率为55%~60%的Ⅰ、Ⅱ类立地的残次阔叶林和杉木林冠下，或地形隐蔽、东向的山垅旱地，选用苗高25 cm以上、地径0.25 cm以上的1年生优质苗木造林；利用农田进行庇荫设施高产栽培，应选用苗高在15 cm以上、地径0.15 cm以上规格的苗木栽植，适宜栽植密度为30 cm×30 cm，遮阳透光率在50%左右。

The daunting efficiency of ground defenses cut both ways; Israeli gunners shot down an estimated 101 Arab aircraft that were attacking troop positions--23 falling to SAMs and 42 to 20-mm ground fire.19

令人害怕的地面防空对交战双方都起了作用：据估计，以色列的射手击落了101架攻击地面阵地的阿拉伯飞机——地对空导弹击落了其中的23架，20毫米地面防空炮火击落了其中的42架。

And we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48