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For the raft, an isoparametric element method and VoigtKelvin model are adopted, which can be used to derive viscoelastic element stiffness matrices, a reform of successive approximation of Rayleigh Quotient is used to solve the eigenvalue problem of the composite structure.

对于筏架结构，采用Voiget-Kelvin模型及等参元法，推导了约束阻尼层单元的刚度阵及将Rayleigh商的迭代步骤加以改进的方法来进行特征分析；对于艇体结构与声学介质耦合部分，采用艇体结构的"干"模态作坐标变换。

No-tillage field was compacted from 1 to 10 times with 4GG-170 reaping machine and Xinjiang-2 combine harvester. Soil bulk density and soil stiffness with the increase of reaping machine stepped times were measured.

用4GG-170型收割机和新疆－2号联合收割机在免耕麦茬地上压地1~10次，测定土壤容重和土壤硬度随碾压次数的变化情况。

Soil compaction induced by Xinjiang-2 combine harvester was higher than 4GG-170 reaping machine. Soil stiffness was influenced by Xinjiang-2 combine harvester in depth reaching to 30cm or more. 3~5 times compaction of Xinjiang-2 combine harvester on soil was equal to 10 times above of 4GG-170 reaping machine.

新疆－2号联合收割机使土壤硬度、土壤容重和孔隙度的变化程度大于前悬挂4GG-170型收割机；新疆－2号联合收割机对土壤硬度的影响超过了30cm；新疆－2号联合收割机对土壤3~5次碾压程度相当于4GG-17型收割机碾压10次以上。

According to vibration theory, for many degrees of freedom systems, the flexibility matrix is obtained by reciprocal relations between flexibility matrix and stiffness matrix.

柔度矩阵元素反比于固有频率的平方，即低阶振动的模态和频率信息在柔度矩阵中所占的影响成分很大。

Secondly, the acoustic wave equation is used derive the stiffness matrix of acoustic rectangular element for performing the acoustic field finite element analysis.

第二部分应用声场波动方程式配合二维矩形元素进行声场有限元素分析。

Two finite element analyses were conducted. First, the poroelastic dynamic equations were transformed to Laplace domain and the Galerkin finite element approach is applied to derive the stiffness matrix of rectangular porous element for conducting the finite element frequency domain analysis.

为探讨空间声场之特性，本文将分析方法归纳为二部份，第一部份应用拉普拉斯转换后之多孔线性弹性动态方程以二维矩形多孔弹性元素及 Galerkin有限元素法推导并进行有限元素频域分析。

Do you have pain in your joints or are you suffering from joint stiffness, swelling and redness?

你有你的关节疼痛，或你患有关节僵硬，肿胀，发红？

Based on the multifunctional demand for the effective heat transfer performance ata specified pumping power and structural stiffness,the thermo-mechanical performance of Kagome cells was studied in comparison with the traditional regular triangle,square and hexagon cells with low relative density.

在此基础上，针对轻质蜂窝(相对密度小于0.3)，选取蜂窝面内等效剪切刚度表征夹层结构的承载能力，综合考虑散热能力和结构承载能力，比较了Kagome蜂窝与传统的正三角形、正方形和正六边形蜂窝的性能。

The equivalent damping and the equivalent stiffness of damper are in near-direct proportion to the damper load. Four remodelment of the damped blade system are performed for parametric studies.

为了对干摩擦阻尼器的性能参数进行研究，本文结合工程实际将凸肩阻尼叶片的参数做了相应的调整和变形，对调整参数后的系统进行了受迫振动响应的计算和分析。

They have a resonant frequency that results from rigidity or stiffness of the mechanical machine members and their mass.

他们有一个共振频率，结果僵硬或僵硬的机械成员和他们的群众。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。