为了避免

to reduce the impact of carrier frequency offset in ofdm system,this thesis designs a new carrier frequency offset estimation scheme for ofdm system.the carrier frequency offset estimation includes acquisition and tracking.we adopt variable step size adaptive algorithm.the acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth.through this method we can not only avoid the feedback by using forward error correction,but also reduce the times of complex multiplication in order to reduce the power consumption of the system.this algorithm not only has low complexity and fast convergence nut also can improve the demodulation performance of ofdm system.computer simulation illustrates the superior performance of the proposed algorithm with regard to estimation accuracy in both awgn channel and multi—path channel.

摘 要：为了减小正交频分复用系统受频率偏差的影响，在ofdm系统中设计了一种新的载波频偏估计算法。频偏估计包括跟踪和捕获两个阶段，文中采用变步长自适应算法来进行跟踪，这个跟踪算法的捕捉范围是整个信号带宽的一半。通过此方法，不但可以利用前向纠错的方式来避免反馈，而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。该方法运算复杂度低，并具有较好的收敛性，能改善odfm的解调性能。从计算机的仿真效果可以看出无论是在awgn信道上还是在多径信道上都表现出了卓越的性能。

Compound document has many features, such as : can be loaded and preserving local documents, it can be avoided in order to read a small portion of the entire data contained in documents.

复合文档具有很多特性，比如：（1）可以加载和保存局部文档，这可以避免为了读取一小段数据而载入整个文件。

In order to improve the uplink bandwidth utility, that is, keeping the guard band between conterminous ONU slots as short as possible, as well as avoiding the upstream data collision, OLT must take the RTT of ONU into account, when arranges the start and ending time of ONU's transmission window.

为了提高EPON上行带宽利用率（即尽量缩短相邻ONU时隙之间的保护带长度），同时避免上行数据冲突，OLT在安排给ONU的授权窗口的开始时间和结束时间时，必须要将ONU的距离考虑在内。

In order to investigate the overall effects of export and import and to avoid abortive research because of the counteraction, the author makes the researches on export and import respectively.

为了全面考察进口和出口对经济增长的不同影响，本文在采用净出口额指标的基础上，对出口和进口分别研究，以避免因二者的相互抵消而使得研究无法得出较为准确的结论。

And they should treat the litigation with caution, and try hard not going to the court.

从经济学的角度看，为了节约资源人们应该尽量选择成本低的方法而回避成本高的方法来解决争端，人们对诉讼应该持审慎的态度，在全社会树立尽量避免引发诉讼、尽量避免选择诉讼的意识和习惯。

Just as it is not the intention to recommend a least common denominator approach, neither is it the intention to recommend avoiding features that exhibit problems on some class of devices.

所以这不是为了推荐一个最小共通方法，也不是为了推荐避免使用某些设备的错误功能。

One method of preserving it is to use it as sparingly as possible, avoiding occasions of expense by cultivating peace, but remembering also that timely disbursements to prepare for danger frequently prevent much greater disbursements to repel it; avoiding likewise the accumulation of debt, not only by shunning occasions of expense, but by vigorous exertions in time of peace to discharge the debts which unavoidable wars have occasioned, not ungenerously throwing upon prosperity the burthen which we ourselves ought to bear....

保存财力的办法之一是尽量少动用它，并维护和平以避免意外开支；但也要记住，为了防患於未然而及时拨款，往往可以避免支付更大的款项来消灾弭祸。我们同样也要避免债台高筑，为此，不仅要减少开支，而且在和平时期要尽量去偿还不可避免的战争所带来的债务，不可吝啬抠搜，把我们自己应承受的负担留给后代

Religious associations began, for example, in the desire to secure the favor of overruling powers and to ward off evil influences; family life in the desire to gratify appetites and secure family perpetuity; systematic labor, for the most part, because of enslavement to others, etc.

例如，为了保证从推翻强权中得到的好处，避免邪恶势力的影响，宗教团体出现了；为了满足人们的食欲，保持家庭稳固，家庭生活开始了。成体系的劳动制度，很大程度上也是由于奴役他人产生的。

He's unbelievable Chorus So tonight I'm gonna get him Got a rendezvous at seven Faire l'amour toujours, so funny Wanna spend all of this money Should I wear a dress and high heels Should I go out in my blue jeans He's the boy I met in my dreams And I tell you girls He's unbelievable Verse 1 Sisters, only sometimes You can meet the kind of boy Who will always give you joy Then grab him, never let him Take him deep into your world Be aware of their girls He's so unbelievable Finally it is me, see me happy Today I have found him He's the boy of my dreams And he's unbelievable So tonight I'm gonna get him Got a rendezvous at seven Faire l'amour toujours, so funny Wanna spend all of this money Verse 2 Brothers, only mothers Have the right to decide What is wrong or what is right But you maybe find a baby Who is no the kind of girl To fit in your mother's world He's so unbelievable Ain't a doubt shout it out that you love her Only such a tough guy Could become my only one Cause he's unbelievable Chorus C-part Sharp dressed you may face your rendezvous Depressed if he's not good looking too Maybe he's a lazy kind of lad Don't forget he could turn into a prince in bed Be sure that he's standing by your side Cowards are a waste of time Get it on if he's always on your mind But avoid being love-blind Look out for his sensitivity Check out if he knows just what it means To give everything that a lady needs To prove that his love is pretty real Some guys only show their sex appeal And who knows why the lord had made 'em If you think he's the right guy fall in love If he's not keepin' your hands off Chorus So tonight I'm gonna get him Got a rendezvous at seven Faire l'amour toujours, so funny Wanna spend all of this money Should I wear a dress and high heels Should I go out in my blue jeans He's the boy I met in my dreams And I tell you girls He's unbelievable Supernatural things will happen I can call you at eleven I will tell you every detail If he's worth it or if he failed But I know he drives me crazy And I want to have his baby So you must excuse me, ladies Did I tell you that He's unbelievable

他难以置信合唱团因此，今晚我一定让他有7个约会放任倾慕始终，所以好笑想花的所有钱如果我穿衣服和高跟鞋我应该走出去在我的蓝色牛仔裤他是我遇到的男孩在我的梦想我告诉你女孩他难以置信新诗1 姐妹们，有时只你能满足什么样的男孩谁将永远给你快乐然后抓住他，从未让他他深入到你的世界知道自己的女孩他是如此难以置信最后，就是我，见我高兴今天，我发现他他是男孩，我的梦想他的令人难以置信因此，今晚我一定让他有7个约会放任倾慕始终，所以好笑想花的所有钱诗二兄弟，只有母亲有权决定什么是错误的或什么是正确的但是，你也许找到一个婴儿没有谁是什么样的女孩以适合您母亲的世界他是如此难以置信不是一个疑问喊出来，你爱她只有这样一个硬汉可以成为我的唯一原因，他难以置信合唱团架C -一部分夏普穿着你可能面临的会合抑郁症患者，如果他不是太漂亮也许他是一个懒惰的小伙子不要忘记他可以变成一个王子在床上可以肯定，他站在你身边懦夫是在浪费时间获取它如果他总是在你心里但是，避免被爱情盲目请注意他的敏感性退房，如果他知道刚才这意味着什么为了让所有需要一位女士为了证明他的爱很真实有的人只展示自己的性吸引力谁知道，为什么大人了他们如果您认为他的权利人爱上如果他不是keepin '你的手离开合唱团因此，今晚我一定让他有7个约会放任倾慕始终，所以好笑想花的所有钱如果我穿衣服和高跟鞋我应该走出去在我的蓝色牛仔裤他是我遇到的男孩在我的梦想我告诉你女孩他难以置信超自然的事情会发生我可以打电话给您， 11 我会告诉你，每一个细节如果他的价值，或者，如果他失败但是我知道他硬盘我疯了和我想他的孩子所以，你必须原谅我，各位我告诉你，他难以置信

Phase-lagged cyclic boundary condition is implemented by a novel method in conjunction with the developed sliding interface technique to accurately simulate the arbitrary pitch ratio rotor/stator interaction without any modifications of the physics of the problem. It's for the first time to compose the computational area into one structured grids including both rotor/stator of centrifugal or axial turbomachinery with arbitrary pitch ratio. This method can eliminate the iteration of boundary conditions on the sliding interface and calculate the unsteady flow within rotor and stator simultaneously.

为了能够在较小的计算区域内不改变叶型而真实地反映出任意栅距比时的内部非定常流场，并避免近似仍采用相位后滞周期性条件，结合本文发展的网格技术，给出了一种新的实施方法，首次将动、静叶片数不等的离心式/轴流式叶轮机械转子、静子计算区域组合在一套结构化计算网格中，动/静叶排间的滑移界面完全按内场处理，避免了每一时层内，滑移界面处边界条件的迭代计算；并保证了每一时层，滑移界面处流动参数的守恒特性。

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。