弹性的

To study the taxiing-induced dynamic response of the aircraft with multiple wheels and multiple landing gears due to runway unevenness, base on several reasonable and necessary assumptions, the mathematical model of aircraft in taxiing is established using the d'alembert's principle. It can simulate taxiing inpact properties accurately, it considers in detail the vertical and horizontal motion and pitching about its center of gravity and the significant symmetric elastic modes.

在一些必要合理的假设下，利用达朗贝尔原理，建立了多轮多支柱式及小车式起落架飞机地面滑跑动态响应分析的全机模型，考虑全机沉浮、机体弹性和定常气动力的影响，起落架支柱的弹性变形，小车式起落架的车架的俯仰运动以及弹性变形，对等速滑跑飞机建立了全机运动的微分方程，并以旧金山28-R跑道为地面输入，利用时域积分的方法得到飞机滑跑的各种响应。

The thesis discusses three eigenvalues individually and explains the pressure wave propagation of three modes, includes wave speed, wave decay and energy distribution. Since the elastic potential energy occupies more than 98% of mechanical energy in the arteries, which is larger than 2% of kinetic energy of flowing blood. Else join elastic wall and wall of managing having a viscid condition to analysis .

本文将个别讨论此三组特徵值，来说明三组压力波的传递模态，其中包括波速，以及波的衰减；由於在动脉的能量分布中，由管壁振动的弹性位能占了98%，远超过血液本身流动的2%，再加上管的弹性模数和管壁的黏滞性再来讨论此三组模态，个别在弹性管的能量分布。

DESPRIPTION】 This product adopts natural activated Collagen Peptide as its ingredient, and combines the SAYF(skin activate and youthful factor) and micro spinning technology of elastic fiber to make the eye pact perfectly fit around the eye contour, It can quickly supplement skin moisture and provide quick penetration of nutrient substance to the stratum basale under the guide of the nutrient substance penetrating absorption principle, as well as promote the vitality of skin cells, 95% of which will efficiently absorb and reserve moisture and balance PH value to make the skin elastic and soft, and significantly improve low collagen synthesis which is related to aging. It can also efficiently prevent and reduce eyes' skin wrinkles and cutis laxa to restore the eyes' skin moist and elastic, and implement the nutrition lost because of the fluctuations in temperatures to promote the natural moisture ability of the skin around the eyes to make those skin instantly moisturized, smooth, refresh and outstanding radiant. The wrinkles and fine lines will be reduced at the same time, and the black circles will be no longer apparent.

本品采用天然的活性胶原蛋白多肽为原料，独有的SAYF融合弹性纤维的微纺技术，完美贴合眼部轮廓，可快速补充皮肤在外界所流失的水分，功效营养物质通过透皮吸收原理，快速渗透到皮肤的基底层，并渗提高皮肤细胞活力，其95%有效吸收留住水分，平衡PH值，使皮肤增加弹性和柔软性；明显改善与老化相关的胶原合成低下的现象，有效预防和减少眼部肌肤皱纹及松弛的现象，恢复润泽和弹性，同时补充眼部皮肤在各种温度不定的情况下流失的营养，提升眼周肌肤自然储水力，双眸瞬间滋润、光滑、丰盈，焕然一新，细纹与皱纹减少，黑眼圈变得不再明显。

If, on the role of epigene, would change his instantaneous and shapes and sizes, and when epigene stops, the paper will revert to the original shape and size, this kind of process is known as minyet elastic deformation; when paper was epigene at the time of a recurring interval between defending the changed his shape and size, epigene falls out of scope when you slow down and revert to the original shape and size, this kind of process is known as anelasticity; scrapped when epigene, paper or maintain in force the shape and size of deformation of the State, known as the plastic deformation.

如在边辛的功用下，会瞬时不天保留自己的轮廓和尺寸，而当边辛罢手时，纸张又会复兴到本来的轮廓和尺寸，这栽变形的功程称为敏不不不弹性变形；当纸张施到边辛时在一按期捍间间隔边保留了自己的轮廓和尺寸，边辛罢手功用时则匆匆不天复兴到本来的轮廓和尺寸，这栽变形的功程称为滞不不不弹性变形；当边辛裁撤之后，纸张还是保留在施边辛功用时变不败的轮廓与尺寸变形的状况时，称为不不弹性变形。

Four aspects of research achievements include:(1)several imaging correction methods and strained estimation methods for biological tissues elasticity imaging were investigated as well as elasticity reconstruction and phantom, in vitro and in vivo elasticity imaging experiments;(2)in the fields of biological microsystem and perfusion evaluation for microvascular system, three kinds of microbubbles whose shell are albumin, sugar ester and surfactant respectively were designed and produced, then the methods to estimate the thickness of their shells were presented, moreover, the interacting mechanism of ultrasound contrast agents and tissues, as well as protein drug delivery under the condition of ultrasound sonification were studied in the molecular level;(3) At the aspect of high intensity focused ultrasound therapy system, we designed and constructed the 256-element HIFU transducers using 1-3 composite materials. And furthermore we developed the integrated HIFU system with 256-element HIFU transducers. And we made preliminary and important progresses in the research of HIFU bioeffect, lesion estimation, techniques of monitoring and imaging and characterizing of structure of HIFU transducer;(4)The real-time method of voice source regeneration based on compensative regulation of physiological parameters was investigated in the field of medical rehabilitation. We addressed the physiology and biophysics of vocalization, modeled voice source regeneration based on compensative regulation mechanism, and put forward an integrated evaluation about the speech rehabilitation and the regenerated voice source; Sixty-one archived journal papers were published, as well as ten in international journals, and eighteen publications were embodied by SCI.

成果包括：（1）在生物组织弹性成像方面，研究了多种图像校正方法和应变估计方法，进行了弹性重构和仿体、离体及在体超声弹性成像实验研究；（2）在生物微系统和微血管血流灌注成像方面，制备了三种不同包膜超声造影微泡，研究了纳米包膜厚度检测与估计方法以及不同纳米包膜造影微泡断裂与药物释放机制，并在分子层次上开展了超声与生物组织相互作用机制以及蛋白质药物超声乳化微囊包裹的研究；（3）在阵列式高强聚焦超声治疗与监控成像技术方面，设计制作了新的HIFU换能器，解决了256阵元单焦点和多焦点合成HIFU治疗系统关键技术问题，并在HIFU生物效应与创伤性评价方法、HIFU过程监控成像技术和薄层复合结构与HIFU 换能器界面特性评价等方面的研究取得了初步而重要的进展，具有重要应用前景；（4）在语音听觉系统特别是嗓音康复方面，研究了基于发声系统补偿调节机制的实时多模式嗓音源再生方法和发声生理，建立基于神经、肌肉和空气动力系统的综合补偿调节模型，提出了相应的评价系统。

According to the series -wound and shunt-wound principle of composite material and equivalent deformation,the calculation formulas for determining the viscoelastic parameters of the effect zones for RCC dam are derived.

根据复合材料力学的串并联理论和变形等效原理，推导了碾压混凝土坝层面影响带粘弹性参数的计算公式，并结合大坝整体粘弹性参数的反演以及相关的试验成果，提出了层面影响带的粘弹性参数的求解方法。

Calculations on the basis of the self-consistent approximation are used to study the effects of slit cracks, elliptical cracks and penny-shaped cracks. The influence of slit cracks on the elastic moduli under all kinds of loading conditions is discussed by Betti's reciprocal theorem and Irwin's relation describing the released energy rate of fracture to the stress intensity factors. The friction between the cracks' surfaces is taken into account for the closed cracks.

采用自恰方法研究了狭长型，椭圆型及硬币型裂纹在荷载作用下对弹性常数的影响；采用Betti的互易定理以及lrwin关于断裂能量释放率与应力强度因子的关系，分析了狭长型裂纹在各种应力状态下对弹性常数的影响；分析研究了裂纹闭合时，由于裂纹面上摩擦力的存在，闭合裂纹时弹性常数的影响。

For the regular curves, we find two Killing fields for the purpose of integrating the structural equations of the p-elastic curves and express the p-elastica by quadratures in a system of cylind...

对于正则曲线的情形，我们发现了两个用于求解p-弹性曲线的结构方程的Killing向量场并用积分将p-弹性曲线在一个柱面坐标系中表示出来，而对仿射星形曲线的情形，我们用积分方法解出了欧拉-拉格朗日方程，利用Killing向量场及线性李代数s1(2，R)、s1(3，R)和s1(4，R)的分类将高阶结构方程降为一阶线性方程，因此我们用积分完全解出了中心仿射p-弹性曲线。

For the regular curves, we find two Killing fields for the purpose of integrating the structural equations of the p-elastic curves and express the p-elastica by quadratures in a system of cy...

对于正则曲线的情形，我们发现了两个用于求解p-弹性曲线的结构方程的Killing向量场并用积分将p-弹性曲线在一个柱面坐标系中表示出来，而对仿射星形曲线的情形，我们用积分方法解出了欧拉-拉格朗日方程，利用Killing向量场及线性李代数s1(2，R)、s1(3，R)和s1(4，R)的分类将高阶结构方程降为一阶线性方程，因此我们用积分完全解出了中心仿射p-弹性曲线。

For the regular curves, we find two Killing fields for the purpose of integrating the structural equations of the p-elastic curves and express the p-elastica by quadratures in a syste...

对于正则曲线的情形，我们发现了两个用于求解p-弹性曲线的结构方程的Killing向量场并用积分将p-弹性曲线在一个柱面坐标系中表示出来，而对仿射星形曲线的情形，我们用积分方法解出了欧拉-拉格朗日方程，利用Killing向量场及线性李代数s1(2，R)、s1(3，R)和s1(4，R)的分类将高阶结构方程降为一阶线性方程，因此我们用积分完全解出了中心仿射p-弹性曲线。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。