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By analyzing the relationship between the deforming precision of Active Lap and corresponding force generated by moment actuators, a new structure of Active Lap for manufacturing a Φ1800mm, F/1.5 large paraboloidal mirror is obtained. Its progressed performance has been proved with 60 units micro-displacement sensor array.
通过分析能动磨盘的变形精度与对应的驱动器产生力大小的关系,优化设计出适用于Φ1.8m、F/1.5主镜加工的磨盘结构,改善的性能在60路光栅位移传感器阵列上得到验证,新结构磨盘已应用于Φ1.8m、F/1.5抛光面主镜的加工工程中。
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This paper examines the soil characteristic and liquefaction degree of hard shell seams at the subaqueous delta of the Yellow River. Four typical areas were chosen for measuring, testing and studying. The hard shell seam strength was measured by in-situ Proctor penetrometer. Undisturbed soil sample of 1 m long was excavated for laboratory soil property test. Sledge hammers were dropped down freely to hit the load board to simulate the wave force acted on the hard shell seam. The excess pore pressure and strength variation were observed. The liquefaction depth of the hard shell seams at four study areas under different wave storms were calculated by theory.
为揭示黄河口水下三角洲硬壳层的土性特征和风浪作用下的液化破坏状况,选择典型研究区,在现场利用普氏贯入仪测试硬壳层的强度特征,原位取1m原状样进行室内土工试验;利用重锤锤击荷载板的方式模拟波浪对硬壳层的动力作用,通过孔压探头和普氏贯入仪实时监测土体内孔压和振动前后强度的变化;通过理论计算研究硬壳层在不同风浪等级下的液化深度。
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Therefore,a series studies of ice-pier vibration are performed from different aspects in this paper.The main work of this his thesis is summarized as follows:(1) Ice response spectra is proposed based on the idea of a seismic response spectra analysis of str .. uctures.Firstly,ice response spectra on the basis of power spectra density function is established;Secondly,based on the assumption of quadratic parabolic interpolation method,the nonlinear interpolation analysis method of ice response spectra is studied from both theoretical and practical points of view,and the successive computation formulas including ice displacement,velocity and acceleration response spectrum are deduced by Duhamel integral.Furthermore,to analyze the effectivity and applicability of the method, the real temporal curves of ice pressure are used to be studied.The results show that the presented method is more convenient and accurate to study the structural response induced by ice force,also it can be effectively applied in the design of ice resistance.
鉴于此,本文针对冰激桥墩结构振动问题从不同方面展开了一系列与之相关的研究,主要研究内容如下:(1)根据结构抗震反应分析思想提出了冰振反应谱,首先建立了基于功率谱密度函数的冰振反应谱;其次借鉴地震反应谱内插法的思想从理论和实际观点出发,假定在等距离微小时间间隔内冰荷载按二次抛物线规律变化,由Duhamel积分推导出冰振位移、速度以及加速度反应谱的一系列连锁公式,建立了基于非线性内插法的冰振反应谱,并利用实际冰压力时程曲线进行了冰振反应谱数值分析,为以后冰激结构振动的研究提供一种方便、简捷、精确的分析方法,也能够将其有效地应用到结构的抗冰计算中。
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Its value is decided by the scientific evidences and practical function of mental test conclusions, and its privative force should be determined by judges, for its admissibility of evidence.
心理测试结论的科学依据和现实作用决定了其证据价值,其在证据能力上具有许容性,其证明力应由法官自由心证。
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Article 128 The limits of carrier's liability in domestic air transport shall be formulated by the competent civil aviation authority under the State Council and put in force after being approved by the State Council.
第一百二十八条国内航空运输承运人的赔偿责任限额由国务院民用航空主管部门制定,报国务院批准后公布执行。
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JAPAN MADE SLIDEX –Semi Auto-closing Sliding Door DeviceGood Points:No using of electricity, Low malfunctioning rate, Quietness, Barrier free, Simple installation, User friendly and Price affordable. SLIDEX functions by hydraulic control and a rack assembled onto the rail allow easy handling. The opening speed and force can be controlled by back check and delay action.
产SLIDEX——半自动平移门闭门器优点:无电源低故障无噪声安装简便经济实惠 SLIDEX采用的液压齿轮泵,属专利简便装置设计在-10至40℃温度范围内都可正常使用您可根据需要随意调整开闭门的速度SLIDEX采用的防撞和缓冲设计,使得我们的产品更加完美SLIDEX最适用于医院,酒店办公室火车车厢银行学校洗手间及家庭等
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InNSb alloy films were prepared on GaAs (001) substrates by N2 radio frequency plasma-assisted molecular beam epitaxy, the N composition and micro-structures of the samples were characterized by atom force microscopy, scanning electron microscopy, X-ray diffraction and Raman spectroscopy.
本文利用射频氮等离子辅助分子束外延(RF-MBE技术在GaAs(001)衬底上生长稀氮InNSb半导体薄膜,并通过原子力显微镜、电子扫描显微镜、X射线衍射仪、拉曼散射光谱等测量手段对样品的微结构和氮组分等进行了表征。
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To dream of the indefinite prolongation of defunct things, and of the government of men by embalming, to restore dogmas in a bad condition, to regild shrines, to patch up cloisters, to rebless reliquaries, to refurnish superstitions, to revictual fanaticisms, to put new handles on holy water brushes and militarism, to reconstitute monasticism and militarism, to believe in the salvation of society by the multiplication of parasites, to force the past on the present,-- this seems strange.
梦想死亡的东西无尽期地存在下去,并采用以香料防止尸体腐烂的方法来管理人群,修整腐朽的教条,在法宝箱上重行涂上金漆,把修院修缮一新,重行净化圣器匣,补缀迷信上面的破绽,鼓动信仰狂的劲头,替圣水瓶和马刀重行装柄,重行建立僧侣制度和军事制度,坚信社会的幸福系于寄生虫的繁殖,把过去强加于现在,那一切,这好象很奇怪。
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On the basis of investigating the sound field of a plane piston transducer and the relations between sound field and radiation force, by settling four plane piston transducers driven at the same frequency at each corner of a regular triangular pyramid with their sound-beam axes crossing at the center of the pyramid, this technique uses ultrasonic wave synthetic theory to acquire a three-dimensional ultrasonic standing wave field. The micro-component can be captured, transported, released in the range of space by adjusting the phase of the transducers.
在研究单个圆形平面活塞换能器声场分布以及声场和辐射力关系的基础上,将以相同频率驱动的4个平面活塞换能器呈正四面体放置,利用声波合成原理获得三维超声驻波场,通过调整各个换能器发射信号相位之间的关系实现对微构件在空间范围内的俘获、移动、释放等操纵。
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Mining area ecosystem is a big system with complex behavior, and its dynamic evolutions are impacted not only by inner natural gender but also by many artificial exploitation factors. These inner causes and external causes interplay, mutually restrict and interact to each other, after that it forms a complicated reticulation. The set of these influence factors give huge force to evolution of mining area ecosystem, and it will cause the ecosystem deterioration or keep healthy.
矿区生态系统是一个行为复杂的大系统,影响其动态演化的因素除了其内在的自然性外还有诸多的人为开发因素,这些内因外因互相影响,互相制约,互相作用,形成一个网状的复杂体系,这样的影响因素的集合将会对矿区生态系统的演变产生巨大的作用力,使得生态系统向着恶化或者继续保持健康的方向运动。
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。