有价值的

This is the Frieze Art Fair and the costs of the most prized pieces of contemporary art have gone up by about 50% in the first 6 months of this year.

这就是弗雷兹艺术博览会。在今年的前六个月，当代艺术品中最有价值的几个的价值增长了五成左右。

We can understand latest industry information and dig out value information from the information of market analysis, technology application and production spread and so on through the way of newspaper, periodical, internet, house organ, association communication and so on.

通过报纸、期刊、网络、内刊、协会通讯、信息中心等收集到的市场分析、技术应用、产品推广等相关信息，了解行业趋势，挖掘价值信息。为客户量身定制，提供最有价值的市场报告，帮助客户完成自己的市场目标。

So obviously holding liquidity provides an option for the shareholders of the bank,and such option is valuable.But its value was not referred in Keynes\'s Liquidity Preference Theory.(2) When the bank holds liquidity assets,it can catch the opportunity in the future to earn more yields.

显然，商业银行的流动性给予股东一种选择权，并且这种选择权是有价值的，但这种价值在凯恩斯的流动性偏好理论中没有提及；另一方面，持有流动性可以让商业银行在未来抓住投资机会，这是投机动机带来的收益。

DunHuang documents is a valuable information source. It accumulates, exchanges and spreads the cultural information effectively by symbols and carriers on time and space. Furthermore, the discovery of the old newspaper DunHuangJinZouYuanZhuang provides the oldest newspaper's authentic proof for the spreading history of news. So, its value is not to be sneezed at.

由于敦煌文献本身非常有效地在时间上、空间上用符号和载体积累、交流并传播着文化信息，是一种极有价值的信息源；同时敦煌进奏院状的发现又为新闻传播史提供了最早的报纸实证，因而它在传播学方面的价值也非同一般，不容忽视。

So, The plant was studied systematically in botanical characteristics, phytochemistry and tissue culture, in this paper some worthy results, which filled in the gaps in the fields of the genus, are reported for the first time.

本文首次在植物学、植物化学和组织培养方面对元宝草进行了系统的研究，获得了一些有价值的成果，填补了元宝草在该领域的研究空白，为元宝草药用价值的开发利用提供了重要科学依据。

So, The plant was studied systematically in botanical characteristics, phytochemistry and tissue culture, in this paper some worthy results, which filled in the gaps in the fields of the genus, are reported for the first time. These researches provide a significant scientific basis for H.

本文首次在植物学、植物化学和组织培养方面对元宝草进行了系统的研究，获得了一些有价值的成果，填补了元宝草在该领域的研究空白，为元宝草药用价值的开发利用提供了重要科学依据。

Here is a normative or value premiss; it belongs to one's ethical or value theory, more specifically, to one's political or social philosophy.

这里是一个标准的或有价值的前提；它属于人的伦理或价值理论，更具体地说，属于人的政治或社会哲学。

In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

本课题从理论模型、有限元数值试验、有限元控制模型等方面以复合振动模式振子为例对超声电机压电振子的动力学特性及其分析方法进行了全面系统地研究，得出了许多有价值的结论，主要概括如下： 1、阐述了目前针对超声电机压电振子的主要建模方法，对压电振子动态特性的研究意义和必要性进行了论述，突出了本文研究内容的迫切性； 2、以压电陶瓷诱发弹性体发生弯曲变形为例，分析了压电陶瓷通过诱发应变来实现机电能量转换的机理；对基于纵弯模式的压电振子的运动及动力传递机理进行了分析； 3、基于模态假定，利用分析动力学的Hamilton原理，建立了面向直线超声电机压电振子的机电耦合动力学模型，并据此建立了压电振子的等效电路模型，导出了电参量与动力学特性参量的耦合方程，为压电振子与驱动电路的匹配提供了依据； 4、从压电陶瓷的本构方程出发，综合力场的弹性动力学方程、几何方程、电场的麦克斯韦方程以及相应的边界条件方程，采用虚位移原理，建立了压电振子动态问题机电耦合场求解的有限元控制方程，为研究其大功率驱动下的非线性本构模型奠定了基础； 5、界定压电振子的动力学特性指标，对压电振子的机电耦合动力学模型参数进行计算及变参数仿真；依据等效电路模型，对压电振子的电学特性进行了仿真分析；通过有限元数值实验，对压电振子工作模态附近的模态振型及工作频率附近的频段进行了激振效果分析，找出了实现模态简并的激振频率；利用有限元控制方程，通过编程计算，对压电振子的力电耦合场参数进行了详细计算，得出了一些有价值的结论。

The diagnostic accuracies of PTC in distinguishing the causes of nontumorous from tumorous lesions were 93.3% and 86.4%, respectively.

PTC对梗阻性黄疸的病因诊断价值高于B超和CT ，在老年人梗阻性黄疸的病因诊断中是一种相当有价值的诊断方法

We can extract value not just from our homes and our portfolios but from ourselves as well.

家庭收入和投资组合可以反映一个人的价值，当然了人本身也是有价值的。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。