查询词典 trophic level

The high-voltage high-power multilevel converter and AC motors drive techniques are summarized compendiously for domestic and overseas studies in the prolegomenon of this dissertation. The evolution and research status of multilevel converter topologies are analyzed, the development of AC variable speed techniques and the characteristic of DTC are discussed, also, the aim and significance for the research are demonstrated. In this dissertation, SVPWM pattern and implement method have been addressed comprehensively for three-level NPC inverter.

本文绪论部分针对国内外高压大容量多电平变换技术和交流传动控制技术作了简要综述，着重分析了多电平拓扑结构的发展和研究现状，讨论了交流调速的发展和直接转矩控制技术的特点，指出本文选题的目的和意义。

Compere: The development of Chinese Internet is in intermediate level, how do you understand?

主持人：中国互联网的发展处于中级阶段，您是怎么理解的？

Compere: A level that how you feel to pay close attention to?

主持人：你觉得如何关注的一个水平？

This can help you gain a high level of competence in English.

这有助于你在英语方面的能力达到一个高水平。

To gain a high level of competence in English.

获得高水平的英语能力。

It's luck. OK, there's a level of competency that is required.

这是运气，当然，是需要一定的能力水平。

This just accounts for the superior quality of our goods,and explians why our clients in Europe and Amercia keep buying from us at our price level. Given the declining market and competieion from low price goods,your price must be very competitive if you want to push the sales of your products here.

考虑到低价商品市场的日渐衰退和激烈竞争，如果想要在这里推动你们产品的销售量的话，你们的价格就必须具备强的竞争力。

That's great, because it's always a challenge to keep competing at the highest level.

这是非常好的，因为在高水平的挑战中你能够保持更好的状态并且提高自身水平。

Radiolabeled ASODN was designed complementation to target mRNA for imaging changes in the level of gene expression in vivo.

用放射性核素标记ASODN，在体外显像可以诊断体内mRNA水平变化，肿瘤的存在和大小。

In this paper the level of elementary graphs is explored, and the D^2 of any non-bipartite elementary graph is proved to be a complete graph.

本文研究了基本图的水平，证明了对于任何非二部的基本图，它的D^2是一个完全图。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。