查询词典 take the field

Alki did not have an alternative for their keeper, so APOP were asked to, ahem, fix it and their fans were stunned to see their stars take the field in white tops with numbers handwritten on the back in marker pen.

可他们却发现本Alki 没有带一套这样二选一的守门员球衣，所以 APOP被要求调整一下，于是他们的球迷赫然发现他们的球星们上场时居然身着白色上衣，然后背后的号码居然是用标记笔手写的。

Most of all,our leaders are the athletes themselves,who epitomize courage anddetermination every timethey take the field.

最重要的，我们的领导就是那些运动员本身，他们在场上最大限度地表现出他们的勇气和决心。

Well, I know that you're in love with him 'cause I saw you dancing in the gym You both kicked off your shoes Man, I dig those rhythm and blues I was a lonely teenage broncin' buck With a pink carnation and a pickup truck But I knew I was out of luck The day the music died I started singing Now, for ten years we've been on our own And moss grows fat on a rolling stone But that's not how it used to be When the jester sang for the king and queen In a coat he borrowed from James Dean And a voice that came from you and me Oh and while the king was looking down The jester stole his thorny crown The courtroom was adjourned No verdict was returned And while Lenin read a book on Marx The quartet practiced in the park And we sang dirges in the dark The day the music died We were singing Helter skelter in a summer swelter The birds flew off with a fallout shelter Eight miles high and falling fast Landed foul on the grass The players tried for a forward pass With the jester on the sidelines in a cast Now the half-time air was sweet perfume While sergeants played a marching tune We all got up to dance Oh, but we never got the chance 'Cause the players tried to take the field The marching band refused to yield Do you recall what was revealed The day the music died?

我知道奶爱上了他因为我看到你们在体育馆里跳舞你们踢掉鞋子老天，我深深感受到节奏与蓝调那时的我是个寂寞的年轻人别着一朵粉红色的康乃馨，有一辆小货车但我明白自己并不走运在音乐死亡的那一天我开始唱着。。。。。。如今十年了，我们全靠自己熬过来了滚动的石头上长满了青苔但，它原来不是这个样子的当弄臣为国王与皇后歌唱穿着向詹姆斯狄恩借来的外套用来自你我的声音当国王低头弄臣偷走了荆棘桂冠法庭当时休会没有任何判决宣判当蓝尼读着马克思主义的书四重奏在公园里排练我们在黑暗中唱着挽歌在音乐死去的那天我们唱着。。。。。。在酷暑中手忙脚乱鸟群飞过辐射尘防护罩高度为八英哩，急速下降错误的降落在草地上球员尝试把球向前传靠着边线上弄臣的帮忙在中场休息时间，空中充满着香味当士官们奏起了进行曲我们都起身准备跳舞但我们始终没有机会因为球员们占据了球场军乐队拒绝让步你还记得当时透露了什麽讯息吗？

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。

After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

The opened magnetic circuit is composed as tow NdFeB permanent magnets and a top plate without U-yoke. After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

Because sheet of the known that the leakage will bring the environment problems in early days the power station constructed, generally not adopt technical measure of defending seeping, the groundwater environment changed obvious influence by the ash water leakage, the paper take the ash field of JiNing Power Station as an example, through the data contrast of the plain ash field water level and water quality in the time and on the apace, expresses that the groundwater of ash field district has already suffered pollution, generally, the scope of the pollution is in 1 kilometer.

由于早期电厂建设时对灰场渗漏引起的环境问题缺乏认识，一般不采以专门的防渗措施，灰水渗漏对地下水环境产生了明显的影响。论文以济宁某电厂灰场为例，通过对平原灰场水位、水质在时间和空间上的数据对比表明灰场区地下水已遭受污染，其污染影响范围一般小于1km。

That's one reason the Yankees have turned to him to take the mound in what is sure to be a raucous atmosphere at Jacobs Field on Thursday night.

这也是洋基周四晚会推出小民在将会充斥著振耳欲聋加油声的Jacobs Field先发的原因之一。

In real life, every scientific field is incomplete and a majority—no matter what they have completed over the past two centuries—is still in their earliest phase. Let's take the example of life science: even the most proficient and professional talents must be capable of changing course of research every several years and the mind-changing in some biological fields is accelerating.

在现实生活中，每个科学领域都是不完整的，而且大多数——不管他们在过去的两百年里完成了些什么——都处于最早期的阶段，例如生命科学，即使是最精通，最专业的人才也必须能每隔几年就转换研究路子（capable of changing course of research）有些生物领域的思路转换（the mind-changing）正在加速发生。

In real life, every scientific field is incomplete and a majority-no matter what they have completed over the past two centuries-is still in the earliest phase. Let's take the example of life science: even the most proficient and professional talents must be capable of changing course of research every several years and the mind-changing in some biological fields is accelerating.

在现实生活中，每个科学领域都是不完整的，而且大多数--不管他们在过去的两百年里完成了些什么--都处于最早期的阶段，例如生命科学，即使是最精通，最专业的人才也必须能每隔几年就转换研究路子（capable of changing course of research）有些生物领域的思路转换（the mind-changing）正在加速发生。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。