查询词典 modal
- 与 modal 相关的网络例句 [注：此内容来源于网络，仅供参考]
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Firstly, the 3D solid model of the analyzed object is built directly in the FEM software ANSYS 8.0 without using other CAD software. The influence of the side sizes of solid elements on computing results and the influence of coupling ways between different parts on the modal parameters are researched by simply modeling. And a new connecting method about joints in ANSYS is proposed and applied to finite element modeling of the test-bed for spindle system. Furthermore, several different computing techniques for modal parameters extraction are compared in solving the finite element model of spindle system test-bed. Many modal solutions are also done to achieve the relationships between the whole or part stiffness value and computed modal parameters. The laws about joint rigid parameters" influences on modal parameters are discussed by means of altering their values for conjoint parts. And by changing local rigid parameter values, the different location selections" influence on computed modal parameters is also studied.
本文通过使用ANSYS 8.0软件直接建立研究对象的实体结构模型，而没有借助其他的CAD软件；通过构建简单的模型研究实体单元边长大小对计算结果的影响，部件之间不同的联结方式对模态参数的影响，探讨在ANSYS中实现结合部的方法，提出一种新的联结方法，并建立主轴系统试验台的有限元模型；对建立的主轴系统试验台有限元模型求解，比较几种不同模态提取方法；通过改变结合部联结单元的刚度参数进行的计算，寻找联结刚度对模态参数变化的影响规律；改变局部联结单元的刚度参数，研究刚度值位置差异对计算模态参数的影响。
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One end is the substantial use of the third person form, the present tense and the past tense; through frequent use of the third person form as the Subject, the writers of commercial editorials are at a position of an impartial third party describing the facts in an apparently neutral manner; the past tense and the present tense are also considerably employed to further help to enhance the objectivity of the writers" presentation, for they reflect the facts and events which did take place and do stay there now. The other is the moderate employment of modal operators and Modal Adjuncts. Those of low value group and median value group form the main body of all the modal operators; instead modal operators of high value group occur least frequently, which imply writers" strong attitude.
为得到更有普遍性更可信的结论，本文作者选取了30篇商业社评作为大样本进行统计处理、描述及分析；通过对语气成分及情态修饰语的分析，探讨了在商业社评中人际功能与非人际表现的平衡；一方面是大量使用第三人称、现在时态与过去时态，另一方面是应适度采用情态算子与情态修饰语。
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Disjunction normal form theorem in the modal logic system S5 is inductively proved, which can be used for representing complex modal formulas by means of conjunction and disjunction of simplest modal formulas with depth at most 1 in the system S5. As application, it is proved that a knowledge base could answer KB-queries if and only if it could answer queries of non-modal propositions and their negations, which is a basic problem on knowledge base.
研究了模态逻辑系统S5中的析取范式定理的归纳证明，给出了在S5中用深度至多等于1的最简模态公式通过析取与合取运算表示含有多重模态词的公式的方法，作为范式定理的应用，讨论了知识库中的一个基本问题，证明了知识库能够回答KB命题式问题的充要条件是该知识库能够回答相关的非模态命题及其否定命题的问题。
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Many researchers have devoted their work to the development of modal analysis extraction techniques in order to obtain more reliable identification of the modal parameters. There are many damping identification methods, but each one has different merit and defect. In order to find which one is the most reliable method with respect to certain characteristics, this thesis focus on how to identify structure's damping in time domain. The following works have been done in this thesis: 1. Investigate four modal analysis methods——the LSCE Method, the Ibrahim Time Domain Method, the Time Domain Collectivity Modal Parameter Method, the Rational Fraction Polynomial Method and improve on the ITD Method in arithmetic.
本文主要做了如下工作： 1、集中研究了四种常用的模态识别方法，即最小二乘复指数法、Ibrahim时域法、时域总体模态参数辨识法及有理分式多项式法，并对ITD法在算法上进行了一定的改进； 2、建立结构动力模型，利用这四种方法在具体条件下识别结构的阻尼，并绘制相应的图； 3、讨论不同的情况下，不同的识别方法对阻尼识别精确性的影响； 4、基于业已明确的阻尼识别的精确性，根据研究的需要，指出在实际的识别过程中，如何选择最佳的识别方法以及识别过程中需要注意的问题； 5、选择最为精确的阻尼识别方法，以导师李书进教授在日本京都大学防灾研究所强震反应实验室所做的一足尺木制结构房屋的动力测试实验为实测模型，识别其阻尼； 6、在本文的最后，尽作者所知，提出了一些需要改进的地方，并对未来的研究方向给出了作者的建议。
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First, modal resolution of the cabinet is obtained by ANSYS modal analysis; Then, modal experiment of cabinet is carried out with impulse excitation method and corresponding modal parameters are obtained.
首先，采用有限元软件ANSYS理论模态分析对机箱进行模态求解，得到计算模态参数；另外，用脉冲激励法对机箱进行模态实验，得到实验模态参数。
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The general infinite dimensional modal system describing liquid nonlinear sloshing is derived first by pressure integral variational principle. After selecting two dominating modes and three secondary modes based on the Narimanov-Moiseev third order asymptotic hypothesis, the infinite dimensional modal system is reduced to a five dimensional asymptotic modal system.
首先通过压力积分变分原理推导出描述液体作非线性晃动的一般形式无穷维模态系统，然后根据 Narimanov-Moiseev三阶渐近假设关系，通过选取二阶主模态和三阶次模态，将无穷维模态系统降为五维渐近模态系统。
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As a result of the tension between these two tendencies, the book reviewer has to balance a reassuringly authoritative display of his opinion/attitude with a concernto be accepted by the reader as true or accurate and to show appropriate consideration for the reader on an interpersonal level. All these constitute the complexity of interpersonal meaning of EABR.With various modal expressions, such as modal auxiliaries, modal adjuncts, metaphors of modality, the reviewer tries to mitigate his opinion to claim different degrees of certainty so as to make his writing convincing as well as revealing; He addresses readers as "you" to exclude them from his group and make himself prominent.
书评作者通过各种情态表达(情态动词、情态附加成分、人际语法隐喻等)造成不同程度的确定与不确定，从而使书评既有可信度又体现了对书作者和书评读者的尊重；当书评作者称呼读者为"you"时，他／她突显自己的权威地位，对读者施加影响，给读者一种文章为他而写的错觉，书评作者或者使用'we'在篇章世界中形成把读者向里拉的拉力，使之卷入到书评的语篇情景之中，积极主动地参与到话语活动中来，从而更容易接受书评作者的观点；书评作者直接引用所评之书的内容，从而使书评语言有力，说服性强。
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Firstly, modal responses were estimated by the application of robust second-order blind identification technique on the measured vibration signals. And then, modal shapes were extracted from the de-mixing matrix above. Finally, frequency and damping ratios could be obtained from the modal responses using each single degree of freedom mode.
运用该法提取系统／结构模态参数的步骤为：首先利用稳健SOBI的盲源分离方法采集的信号进行分离，然后将分离矩阵作为结构／系统的模态振型矩阵，最后再对各个分离后的单自由度信号提取频率、阻尼比参数。
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There are two subtypes of modal dialog box: application modal and system modal.
模式对话框有两种子类型：应用程序模式和系统模式。
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Two examples are given to show that order reduction technique based on modal value analysis method is superior to the common technique which simply selects the modal vecors associated with the lower modal frequencies.
通过两个算例说明本文方法是对通常选择低频模态的降阶方法的改进，提高了低阶模型的精度。