下游

One of a group of North American Indian peoples of the Caddoan linguistic family that originally occupied the lower Red River area in Louisiana and Arkansas .

北美印第安部落联盟中一员，所操语言构成卡多语系。原住红河下游地区，相当於现在的路易斯安那州和阿肯色州。

The results shows that the holistic model was much more difficult than separate model in model building, element meshing and calculating, but it was complex conform to reality and it can also reflect the interaction of dam and factory building.

在高烈度地震作用下，混凝土重力坝及厂房的抗震安全性关系到下游广大地区工农业生产和人们的生命财产的安全，因此，对混凝土重力坝及坝后厂房的地震响应分析具有重大的现实意义。

The use,production method and the situation at home and abroad of some carbamide downstream product which have broad market prospect were reviewed.

介绍了几种具有广阔市场前景的尿素下游产品的用途、生产方法及国内外生产情况。

We found that compound TMU023 stimulated a dose dependent AMPK phosphorylation in NRK52E cells. The activation of AMPK is associated with increased phosphorylation of its downstream substrate, acetyl CoA carboxylase, and increased fatty acid b-oxidation in NRK52E cells.

我们发现了一个编号为TMU023的纯化物，可以刺激NRK52E细胞中AMPK的磷酸化，活化的AMPK也可以增加其下游受质acetyl CoA carboxylase的磷酸化和NRK52E细胞的脂肪酸b-氧化作用。

AIM: To investigate the downstream genes of the transcriptional factor Pax-8 related to cardiopathy.

目的： 寻找先天性心脏病相关基因-转录因子Pax-8的下游基因。

The story is from the "victory day" start-sheng days, Katsushi brothers and their friend in adversity A water, in order to succeed, desperate Pirates of the wood, where the emerging forces in case of Tsai Chins men shot the elephant, the two sides fight in endless, Sheng days Jizhongshengzhi will be full of cypress wood into the stream, not only escaped the entanglement of an elephant, but also we have successfully drifted to the lower reaches of cypress wood.

故事是从'胜天'开始，胜天、胜志兄弟及其患难之交阿水，为出人头地，铤而走险盗木，遇上地方新兴势力蔡进炮的人马大象，双方缠斗不已，胜天急中生智，将桧木全推入溪中，不但逃过大象的纠缠，也顺利地将桧木漂流到下游。

Because the temperature along the pipeline is not a constant, it changes the velocity of the negative-pressure-wave; the Romberg algorithm of numeric integral and the searching for algorithm are emloyed to locate the leakage.Multi-scale decomposition and reconstruction of wavelet transform is applied to filter the noise of negative-pressure-wave, which was brought by leakage. With the capacity to detect the signal singularity fast and accurately, wavelet transform was used to catch the break point of pressure signal. The work improved the accuracy of Δt in location formula, and the location accuracy is improved.

利用小波变换的多分辨分析和重构技术，对采集到的管道发生泄漏时产生的负压波信号进行了消噪处理；并利用小波变换技术对信号奇异点快速、准确的识别能力，对经过消噪处理后的负压波信号进行了奇异点捕捉，准确确定了定位公式中上、下游站点采集到的负压波奇异点的时间差△t，从而提高了定位的精度。

At the same time, combining with the actual condition of delivery pipeline of our country and some prevalent leak detection and location methods, this paper raised a method, which is based on wavelet analysis and negative- pressure-wave to detect and locate the leakage. Jobs in the paper are as follows:As affected by gas density, pressure, specific heat and pipe material, the velocity of negative-pressure-wave improved depending on the energy conservation. At one time, taking the affection of velocity of gas flow, the location formula was modified in some degree.When locating the leaks with location formula, the iterative approach algorithm was adopted as a new method to increase the location accuracy level of system.Multi-scale decomposition and reconstruction of wavelet transform is utilized to filter the noise of negative-pressure-wave, which was brought by leakage. With the capacity to detect the signal singularity fast and accurately, wavelet transform was used to catch the break point of pressure signal. The work improved the accuracy of At in location formula, accordingly improved the location accuracy.Wavelet is a suitable tool for signal analysis. The distinct character is that the mother-wavelet is of optional. That means choosing different mother-wavelet will get different analysis result. So we studied how to choose mother-wavelet and its scale for signal singularity detection. The method is to choose a wavelet by regularities of the wavelet and the signal.Finally, a plan, which bases on SCADA system for inspection and detection of natural gas leakage, is proposed in the article.

其中，主要进行了以下几方面的工作：针对泄漏产生的负压波在管道中的传播速度受媒介的密度、压力、比热及材质等因素的影响，而非声波在空气中传播的速度，本文利用能量守恒原理，对其进行了修正；考虑到管内气体流速对压力波速的影响，对原始的负压波定位公式进行了一定程度的改进，并在利用定位公式进行泄漏点定位时采用逐步迭代逼近算法，提高了系统的定位精度；利用小波变换的多分辨率分解和重构技术，对采集到的管道发生泄漏时产生的负压波信号进行了降噪处理；并利用小波变换技术对信号奇异点的快速、准确的识别能力，对经上述消噪后的负压波信号进行了奇异点捕捉，精确捕捉的结果提高了定位公式中上下游站点采集到的负压波奇异点的时间差△t的精度，从而进一步提高了定位的精度；考虑到小波变换是一种基波可变的信号分析工具，也就是说，不同的小波基波对信号分析的结果将有很大差别，这势必影响最终的处理结果，因此，我们又对比分析了本课题中小波基及尺度的选择问题，依据规则性系数相似性原理对母小波的选择进行了探索性研究；最后，还提出了基于SCADA的泄漏检测与定位系统的软件开发构想及系统的嵌入方案。

High SPM content in water is also an important pollution to the catchment area.

而河流的高SPM含量本身对下游的用水就造成污染。

Because it was unable to supply big new customers, companies have tended to set up new factories outside its catchment area.

许多新的大客户正因为它无法保证足够电力供应而更愿意在它的下游建立新工厂。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。