小振动

The " cloud " in the " between pink clouds of white emperor of decline of day of the " in the poem is vapor is encountered cold the Xiaoshui that form drips to gather and be become in float of empty horizontally pivoted hung, the hill of river of liquefacient;" a thousand li in belonging to states of matter to change returns the " in " one day one day to return ", the rate that shows a boat is very rapid,"What " of a thousand li points to is distance,"What a day of " points to is caw of simian sound of time;" two sides does not live ", simian ululation is by simian vocal cords vibration generation, canoe of the;" in relying on air to upload person ear from the bank already crossed " of 10 thousand heavy hill, be it is with hill consult content, the boat is moving,"Canoe " explained the quality of the boat is lesser, and still got water is opposite it up buoyancy.

诗中"朝辞白帝彩云间"中的"云"是水蒸气遇冷形成的小水滴在空中悬浮聚集而成的，属于物态变化中的液化；"千里江陵一日还"中的"一日还"，说明船的速度很快，"千里"指的是路程，"一日"指的是时间；"两岸猿声啼不住"，猿啼声是由猿的声带振动而产生的，并靠空气从岸边上传到人耳中；"轻舟已过万重山"，是以山为参照物，船在运动，"轻舟"说明了船的质量较小，并且还受到了水对它向上的浮力。

In the past, the high frequency resonance technique is usually applied in the envelope detection for a vibration signal with amplitude modulation. When applying the Hilbert transform in the high frequency resonance technique for the envelope detection of vibration signals, the computing burden is very high. On the other hand, when applying the linear least squares analysis method, the computing burden is lower. When applying the envelope detection in the lowest vibration mode, an accelerometer with the low-pass filtering cutoff frequency at 4kHz should be choose.

在过去的研究方法中，振动讯号之振幅调变通常以高频解调分析法应用於包络讯号侦测，而高频解调方法应用希尔伯特转换的包络分析，所需要的计算量是非常的高，若以线性最小平方分析法应用於高频解调分析法中，则所需要的计算量较小，如果以最低模态来估测包络讯号时，可以适当的选取加速规来代替低通滤波器，而加速规的截止频带必须在4kHz左右。

The solid state image sensor is compared with average image sensor , have volume lacking fidelity for a short time, for a short time, sensitiveness is high , resist to vibrate , is able to bear moistness , a lot of merit of cost low grade, therefore can broad apply to industry measurement, is that meticulous of our country processes , development of robot technology and industrial automation field gets the significant effect under the control of, especially waiting for a field in pattern recognition, and with the branch who seeps through each that the industry and agriculture in our country produces broadly.

固态图像传感器与普通图像传感器相比，具有体积小、失真小、灵敏度高、抗振动、耐潮湿、成本低等许多优点，因此可以被广泛应用于工业测量、控制，尤其是在图像识别等领域，并将广泛渗透于我国的工农业生产的各个部门，为我国的精细加工、机器人技术以及工业自动化领域的发展起重大作用。

This paper presents natural vibration experiment and sine excitation experiment of the frame with different energy dissipation braces （the little character brace or the unidirectional diagonal brace or the little- character-toggle-brace）and compared their capability of energy dissipation.

介绍了空框架以及附加单向斜撑、小八字撑以及小八字曲拐撑的4种结构的自由振动试验以及正弦稳态激振试验，比较了其消能能力。

A correlation of the experimentaldynamic response of the vessels with the theoretical finite element calculations ispresented and discussed.1 The response of the end caps is dominated by transverseand torsional deformation of the plates.The membrane strain is negligible compareto the lateral strain.2 In the lengthwise direction of the inner cylinder,themembrane strain has the same magnitude as that of the bending strain. But for theouter cylinder,the former is much smaller than the later at the same direction.3 Forboth the inner shell and the outer shell,hoop strains are primarily due to themembrane deformation.The amplitude of the circumferential flexural strain isconsiderably small.4 Peak strains in the vicinity of the connection portion of theend caps and the shells are very high.This is important to assess the safety of thecontainer in case of repeated use or tests.5 The applying load to the end cap isdifferent from that to the inner shell plate, but peak stains and nodal displacementsof these two structural parts are nearly the same.It can be inferred that the dynamicresponse of the end cap is greatly affected by the structural vibration excited by theimpulsive loading.

结果表明：1在本文所考虑的载荷水平下，平板变形以板的横向弯曲和扭曲为主，中面应变幅值比较小。2对于内容器，其纵向变形中弯曲应变和中面应变大小接近；而对于外容器，其纵向变形以弯曲为主，中面变形比较小。3内、外壳体的环向变形主要是中面应变，弯曲应变分量很小。4平板和壳体连接处应变很大，这对于多次使用或实验时评价结构安全有指导意义。5尽管内筒底板和大封头上的作用载荷有一定差别，但应变峰值和节点位移峰值基本相近，这说明脉冲载荷激发起来的结构振动对封头的动态响应有很大影响。

The results showed that the residual yield point stress descended and cushion coefficient increased with the number of vibration and the acceleration increased. Cushion coefficient don't change much in the small stress stage; while in the large stress stage; cushion coefficient increases obviously.

结果表明，随着振动次数、振动加速度的增加，瓦楞纸板剩余屈服应力减小，缓冲系数增大，其中在小应力阶段缓冲系数变化不大，在大应力阶段，缓冲系数显著增大。

This thesis presents the studies of U-shape gantry structure of container gantry crane, and dynamic simulation and fatigue life estimation of its rigid anti-sway. The main contends are as follows: Supposed that trolley frame is composed of spring structure, due to larger trolley gauge of U-shape gantry structure. For the gantry crane, a series spring dynamic vibrating model with three masses, three freedoms of degrees is built in this thesis and vibrating calculus equations are precisely resolved by mode analyses rule.

本文研究集装箱门式起重机U型门架结构及其刚性减摇系统的动态仿真和疲劳寿命估算，主要内容如下：由于U型门架结构小车轨距较大，本文建立了考虑小车架为弹性结构时门式起重机的三质量三自由度串联弹性动力学振动模型，用模态分析法求解振动系统微分方程组的数值精确解。

But because of its big slenderness ratio, smaller rigidity and damping, it is easy to cause a larger vibration in the windload and iceload function and so on, mast structure destruction accidents frequently occurred, has caused engineering and academic circles\\\s concern, this article summarizes the main structure damage diagnosis methods, carrys on preliminary dynamic analysis and the time-frequency distribution analysis with the vibration signal to the mast structure, and proposes the signal processing method is a appropriate method on the diagnosis to the mast damage.

但是，由于桅杆结构长细比很大，刚度、阻尼较小，在风荷载、裹冰荷载等作用下容易产生较大幅度的振动，桅杆结构的破坏事故时有发生，引起了工程界和学术界的重视，本文总结了几种主要的结构损伤诊断方法，并对桅杆结构进行了动力分析和振动信号时频分析，并提出信号处理的时频方法对桅杆损伤进行诊断比较合适的。

Theoretically,the intershell coupling makes energy bands of multiwalled carbon nanotubes split and the degeneracies in the energy bands reduced,and the bandgaps of multiwalled carbon nanotubes decreased.The small bandgaps of multiwalled carbon nanotubes ensure the presence of a vibrational manifold in the optical region for each shell so as to minimize optical emission.

计算结果表明，层间耦合使多壁碳纳米管的能带分裂，能级简并度降低，同时使多壁碳纳米管的带隙减小，小的带隙确保了每层中都存在振动模式，多数激发态电子通过相邻管的快速振动转化能量而产生无辐射跃迁，使其荧光很难观察到。

Primary parametric resonance of a parametrically excited simply supported thin rectangular plate on nonlinear elastic foundation is analyzed.

分析非线性弹性地基上受参数激励小挠度矩形薄板的主参数共振问题，由冯卡门方程和伽辽金方法得到系统的非线性振动方程，它是杜分-马休型方程，应用非线性振动的多尺度法得到平均方程。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。