在衰落

Economic main body of Rome is agriculture from beginning to end, commerce is in appurtenant position all the time; Roman commerce is to be the same as a war closely related, warlike end means commercial decline; Rome is distaining commerce on the idea all the time, implemented a series of policy that go against commerce in later period, this caused the collapse of businessman and commerce directly, make the society enters autarky state thereby.

罗马的经济主体始终是农业，商业一直处于从属地位；罗马的商业是同战争密切相关的，战争的结束意味着商业的衰落；罗马在观念上一直是鄙视商业的，并在后期实行了一系列不利于商业的政策，这直接导致了商人和商业的瓦解，从而使社会进入自给自足状态。

It is closely associated with lung function decline and is not always associated with low oxygen in the blood.

它同联系在一起严密肺脏功能衰落和总不同联系在一起低氧气在血液。

Under the assumption that the channel state information was available only at the receiver,the capacity of MIMO systems in Rayleigh fading channel was investigated on the basis of information theory. Three special expressions for the MIMO capacity over ergodic flat fading channel were derived.An asymptotic formula for MIMO systems with equal number of transmit and receive antennas in small SNR was also given. Simulation results show that this approximation is relatively accurate.

以信息论的观点为基础，在假设信道状态信息仅收端已知的情况下，采用等功率发射方案，研究了瑞利衰落信道下MIMO系统各态历经信道容量，推导了三种特殊MIMO信道的各态历经信道容量表达式，以及在小信噪比下等收发天线MIMO系统的容量近似公式，并通过仿真进行了验证，仿真结果表明该近似公式比较精确。

Moreover, the algorithm can converge to the desired userunder discretional initial conditions, and the performance of convergence andsteady-state behavior of the algorithm are more better than that of otheralgorithms.Therfore the proposed algorithm is a practical and valuable method in thefuture.

由于其步长的自适应变化，使得它在多径衰落信道中，依然具有较好的性能，而且在任意初始条件下，都能够正确收敛到目标用户，收敛速度更快，稳态性能更好，具有一定的实用性。

And the cross correlation function is approximately zero, which makes them suppress the disturbances due to the other users. After describing some basic knowledge of chaotic theory in chapter 2, we interview and classify the applications of chaos in communications including chaos secure communication, chaotic spreading codes for multi-user access in spreading spectrum system and chaotic modulation and demodulation in chapter 3. FM-DCSK system with non-coherent demodulation offers the best performance in chaotic modulation schemes.

在混沌调制方案中， FM-DCSK调制是一种极具竞争力的混沌调制方式，它克服了CSK、COOK、DCSK解调中存在的估计问题的缺点，在无线信道的传输过程中，可以很好的抑制噪声干扰与多径衰落，并且能获得非常优越的解调性能，加上混沌信号本身优越的保密性能，该调制方式在未来的无线通信领域存在着巨大的潜在优势。

The instantaneous SNRof the receiver of STBC over raying fading is illustrated, based on this, the closed impression of STBC's symbol error rate is educed with M-PSK and M-QAM modulation and also presents the numerical results.

给出在瑞利衰落信道下正交空时分组码瞬时接收信噪比的一般表达式，在此基础上推导出正交空时分组码在M-PSK和M-QAM调制下误符号率的闭式表达式，并给出数值分析结果。

My thesis is divided into three chapters: In the first chapter, I mainly present the excavations of Oxyrhynchus, the discovery of the Hellenica Oxyrhynchia, the author, the organization, the style and the vocabulary of the Hellenica Oxyrhynchia as well as the time of writing and the scope of the content.In the second chapter, I mainly analyze the war at Ephesus, Megara and Notium recorded in the Cairo Fragment and Florence Fragment and compare them with other historian\'s records.In the third chapter, I analyze the contents of London Fragment item by item and compare the parallel records with the other historian\'s. I mainly discuss the prosperity of Thebes and the fall of Athens in the Peloponnesian War, the constitution of Boeotia, the recovery of Athens after the Peloponnesian War, the consolidation of Spartan hegemony, the Corinthian War, the democratic revolution of Rhodes, the relationship between Persia and the Greek City States, the political conflict inside the Greek City States, etc.

本文共分为三章：在第一章中，笔者主要探讨了奥克西林库斯的考古发掘、《奥克西林库斯希腊志》的发掘出土及其作者、体例、语言和风格、创作时间以及记载的内容；在第二章中，主要对《奥克西林库斯希腊志》的开罗断片与佛罗伦萨断片所记载的以弗所战役、麦加拉战役和诺丁姆战役进行了史料分析和文献比对；在第三章中，笔者对伦敦断片所记内容进行逐条分析并与其他史家的记述进行了文献比对，其中主要探讨了伯罗奔尼撒战争中雅典的衰落与底比斯的繁荣、比奥提亚的联盟体制、伯罗奔尼撒战争之后雅典的复兴、斯巴达霸权的巩固、科林斯战争、罗德斯民主政变、波斯与希腊城邦的关系以及希腊城邦内部的党派斗争等内容。

Simulation results show that the coding gain of this scheme can achieve 10 dB at bit-error rates around 10-3 compared with the uncoded QPSK in M fading channels.

仿真结果表明：在适应于北京地区的M衰落信道中，RS码与MPSK相结合方案在不增加频带带宽的前提下，与未编码的QPSK相比较，在Pb=10-3时，可有10 dB的编码增益

With paintings sharing 90% in art market, some people say that paintings pail in the west but revives in China.

中国油画在艺术品市场上占有90%的份额，有人说油画在西方衰落了，而在中国却复兴了。

The worst frost damage occurs in areas that are usually frost-free, where exposed mature tropical trees, such as mango, or indigenous plants, such as tree ferns and eucalypts, can be set back or even killed.

最严重的霜冻灾害发生在通常没有霜冻发生的地方，在这些地方裸露在外的，芒果等成熟的热带树木，或是蕨类植物和桉树等土生土长的植物，会衰落甚至死亡。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了