缩减的

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。

Chaikin algorithm is the simplest discrete curve modeling method.In thepaper planar Chaikin algorithm is generalized into sphere,and the practicability ofthe algorithm as well as the continuous differentiable property of the generatingcurve is proved.It is shown that the curve generated by Chaikin algorithm is apiecewise spherical Bezier curve of second kind of order two.Furthermore,generalspherical corner-cutting algorithms are discussed,and it is pointed out that thecurve generated through corner-cutting has"Spherical Variation DiminishingProperty".3Curve interpolation method restricted on a smooth surface based ontransformation.

Chaikin算法是最简单的离散曲线造型方法，文中将Chaikin算法推广到球面，证明了算法的可行性和生成曲线的连续可微性，指出球面Chaikin算法得到的曲线是分段的二次第二类球面Bezier曲线，并给出了用球面Chaikin算法构造球面插值曲线的算法；进一步，文中讨论了一般的球面割角算法，指出由球面割角算法得到的曲线具有"球面变差缩减性质"。3基于变换的约束在光滑曲面上的曲线插值方法。

Unfortunately, that may well prove temporary: first, your stimulus programme, with its reliance on massive credit expansion, may prove unsustainable; second, the decline in China's trade surplus is largely the result of the crisis-induced collapse in world trade; and, third and most important, China has embarked on currency deprecation by locking the renminbi to the falling dollar.

不幸的是，这种缩减很可能只是暂时的：首先，贵国的刺激方案依赖于大规模信贷扩张，可能难以维续；其次，中国贸易顺差的减少，主要是金融危机导致的世界贸易萎缩的结果；最后一点，也是最重要的一点，由于钉住了不断贬值的美元，人民币也在贬值。

After taking experiments on PPC, it shows that the performance can be improved more than 50% for comparison of the supper sampling with satisfying image quality and the table size is only about 10% of the Walter Algorithm.

通过手持设备上的实验证明，与传统的过采样方式相比，在不影响图像质量的前提下，性能提高了50％，与Walter的编码滤波器相比，查找表的大小缩减到了原来的10％左右，从而证明了此方案的可行性和高效性。

No. 3, with its glimpses of mazurka, followed by a solemn chorale section that suddenly curtails the piece without the expected return to the opening material ---- evidently a late inspiration, since an early manuSCRIPT fragment of the piece assumes the conventional da capo return.(the other side of the same manuSCRIPT contains the study op. 10 no. 9, suggesting that this nocturne was at least partly composed well before the date of 1833 usually ascribed to it.) chopin is said to have associated the piece with hamlet ---- one of many literary images prompted by his music.

最为典型的例子是op.15no.3，在它中间有着玛祖卡舞曲的惊鸿一瞥，之后是肃穆的赞美诗部分，这一部分突然缩减了这一篇章，而不是象预期的那样回到开始之处，而早期的手稿中这里是采用了传统的da capo返回（这篇手稿的另一面还写有op.10no.9，这表明这部夜曲至少有一部分是在1833年以前创作的）据说肖邦把这个乐章和哈姆雷特——在他的音乐中提及的众多文学映像之一——联系在了一起。

Association rules mining is a very active field in data mining and there are many algorithms today. In this field, the most classical algorithm is Apriori put forward by Agrawal et. al and it is used widely. The paper analyzes the advantages an disadvantages of Apriori, AprioriTid and AprioriHybrid algorithm in mining association rules. To solve the bottle of AprioriHybrid algorithm, a Support-Matrix method to rapidly verify the 2-frequent itemsets is put forward. To accelerate the speed of verify the k-frequent itemsets, a simple and highly efficient method of minimizing the trade database is given. All these two methods improve the efficiency of AprioriHybrid method.

关联规则挖掘是数据挖掘中一个非常活跃的领域，当前有许多种算法，最经典并被广泛使用的是Agrawal等人提出的Apriori算法及其衍生算法，本文分析了Apriori，AprioriTid和AprioriHybrid算法的优缺点，针对AprioriHybrid算法的瓶颈提出一种使用支持度矩阵对频繁2项集快速验证的方法，并给出一种简单易行，而又高效的逐步缩减交易数据库的方法，加快对候选频繁k项集的验证速度，从而提高了AprioriHybrid算法的效率。

In chapter one,the backgrounds and current situation of operator theory in Banach space are introduced and the preliminaries of Banach space are given.In chapter two,we study the existence and uniqueness of fixed point for decreasing strict-set-contraction operator in product space.Under the weak continuous condition,we obtain the existence and uniqueness of fixed point for decreasing operator and we give an application of these results; In chapter three,we get several positive fixed point theorems of decreasing operator and the existence and uniqueness theorems of positive fixed point for operator C=A+B,C=D-A in real Banach space where the order is decided by a normal cone; In chapter four,we obtained some existence and uniqueness theorems of fixed point for some mixed monotone operators in semi-ordered Banach space.

在第一章中，主要介绍了半序Banach空间非线性算子的研究历史背景、现状以及半序Banach空间中的预备知识；在第二章中，我们利用半序方法研究了Banach乘积空间中严格集压缩减算子不动点存在唯一性问题，在弱连续的条件下，得到了不动点的存在唯一性和迭代收敛性，同时，给出了它们的一些应用；在第三章中，我们建立了拟弱连续减算子的正不动点定理，并证明了算子C=A+B，C=D-A的正不动点存在唯一性定理；在第四章中，我们得到了半序Banach空间中混合单调算子的不动点存在性及唯一性定理。

In recent years, due to industrial structure changing rapidly, enterprises face the situation that the industry has been relatively mature and even recessional, they invariably deliberate on how to reduce cost and adjust enterprise constitution.

近由於产业结构迅速变化，企业在面产业日趋成熟、甚至衰退的况下，无亟思如何低成本、调整企业体质，因此产业型态与雇用模式亦出现有别於以往的变化，组织规模渐趋向精简与扁平化、专营於某块专业基的顾问业纷纷崛起，加上求职者工作价值观的改变，终身雇用制之式微等等现象，许多企业纷纷采行各种措施，如组织再造、缩减规模与劳动弹性化等，期望能专注於本身专长的核心优势，并将非本身专长的工作以外包的方式来降低成本。

For instance, when President Reagan entered into the Montreal Protocol, a treaty mandating reductions in the production of chlorofluorocarbons and halons, that treaty became the law of the land, and its provisions superseded any existing federal or state laws inconsistent with the treaty.

例如，当里根总统参与研讨了《蒙特利尔协议》，一个下令缩减氯氟碳化合物和碳卤素化合物产量的条约，这个条约就成为国家的法律，并且它的出台取代了任何联邦和州的与之相矛盾的法律。

For instance, when President Reagan entered into the Montreal Protocol, a treaty mandating reductions in the production of chlorofluorocarbons and halons, that treaty became the law of the land, and its provisions superseded any existing federal or state laws inconsistent with the treaty.

例如，当里根总统签署了《蒙特利尔协议》（一个下令缩减氯氟碳化合物和碳卤素化合物产量的条约）时，这个条约就成为国家的法律，并且它的条款优先于任何联邦和州的与之相矛盾的法律。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。