效能

However, for mobile applications, channel variations within an OFDM block period destroy the orthogonality between subcarriers; the effect, known as Intercarrier Interference, will degrade the system performance.

然而在行动通讯的应用上，时变通道破坏了子载波间的正交性，造成载波间的互相干扰因而降低系统效能。

For example, IEEE 802.16e supports vehicle speed up to 120 km/hour, and IEEE 802.20 supports vehicle speed up to 250 km/hour. OFDM systems can be used efficiently in time invariant environments with one-tap equalizers. However, subcarriers are no longer orthogonal to each other in time-varying channels, and this causes the intercarrier interference and degrades the system performance.

传统的正交分频多工系统可以有效率地使用在非时变通道中，且仅需简单的等化器，即可修正通道效应，但在移动的环境中，通道随著时间改变，使得接收端的子载波失去正交性，因而导致子载波之间的相互干扰，使得解调变后的效能降低。

For example, IEEE 802.16-2005 supports vehicle speed up to 120 km/hour. OFDM systems can be used efficiently in time invariant environments with one-tap equalizers. However, subcarriers are no longer orthogonal to each other in time-varying channels, and this causes the intercarrier interference and degrades the system performance.

传统的正交分频多工系统可以有效率地使用在非时变通道中，且仅需简单的等化器，即可修正通道效应，但在移动的环境中，通道随著时间改变，使得接收端的子载波失去正交性，因而导致子载波之间的相互干扰，使得解调变后的效能降低。

However, OFDM systems can be extremely sensitive to synchronization errors. Minor carrier frequency offset and symbol time offset can cause intersymbol and intercarrier interference and degrade system performance very seriously.

然而，正交分频多工对於对同步错误极为敏感，些许的载波频率偏移与符元时序偏移就能造成符际干扰及子载波干扰，导致系统效能变差。

For orthogonal frequency division multiplexing systems in high-mobility environment, channel variations within one OFDM symbol will introduce intercarrier interference, thus lowering the system performance.

对於应用於高移动通讯环境之正交分频多工(Orthogonal Frequency Division Multiplexing， OFDM)系统，每一个OFDM符元期间的通道时变导致载波间干扰(Inter-carrier Interference， ICI)发生，使得系统效能降低。

For example, the availability of support in the broader family unit may foster the development of necessary developmental skills and capacities, such as regulation of emotions, self-condence, and self-efcacy, for maintaining a sense of security in the face of interparental difficulties.

例如，在更广泛的家庭单位提供的支助可以促进情绪调节，自我发展的必要的技能和能力，发展自信，自我效能，维持在interparental面对困难安全感。

The Efficacy of Intratracheal Administration of Vecuronium in Rats, Compared with Intravenous and Intramuscular Administration

大鼠气道内给予维库溴胺的效能：和静脉以及肌肉途径给药的比较。

According to the chromatograms, we choose the several peaks which are more abundance as the characteristic peaks. Additionally, to compare the isocratic elution and gradient elution two systems, we find that it is obviously better to use the gradient elution.

另比较以等位冲提及梯度冲提方式进行高效能液相层析仪分离的结果，发现使用梯度冲提的分离效果明显较好。

The effectiveness of iTEA is evaluated using simulated expression patterns with and without noise running on a single-processor PC.

我们利用单 CPU 电脑，并且使用模拟产生不含及含有杂讯的基因表现量资料来对 iTEA 做效能评估。

Therefor APSO and DES framework can not only find the better solution but also use fewer iterant times.

所以本研究所提出的演算法，不仅在找到新的最佳解上有好的效能表现，在代数的快速收敛上也有好的效率表现。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。