upper-level low

Compared with the LUD ( Lower and Upper triangular matrix Decomposition) algorithm which also has high estimation performance, the new algorithm has higher resolution under low Signal-to-Noise Ratio ( SNR) condition, or same resolution under high SNR.

与同样具有高性能的LUD（Lower and Upper triangular matrix Decomposition）算法相比，在低信噪比时新算法的分辨率更高，高信噪比时，二者性能则相似。

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The coupling of a meso-scale low pressure and the divergence zone of an upper-level jet caused strong upward motion.

低层中尺度低压环流的扰动，并与高空急流南侧的辐散区耦合，产生强烈的上升运动；

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The paper analyses minimal angle of defection in test machine dial ( low accuracy), test piece glide, faint defintion ( upper yield strength-lower yield strength-yield strength), different stress speed, so as to register errors, and puts forword correction.

分析材料试验机度盘偏转角度小（准确度低）、试样打滑、定义（上屈服强度-下屈服强度-屈服强度）模糊、不同应力速率等导致误读，并针对误读原因提出纠正方法。

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The Upper Paleozoic Carboniferous-Permian source rocks are mainly coal measure strata, with thickness in the range of 150~ 500m, low to medium organic matter abundance, and type ⅲ kerogen.

上古生界石炭&二叠系烃源岩主要为煤系地层，厚度为150~500m，有机质丰度属于低-中等，有机质类型为Ⅲ型。

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Europe-Asia circulation position between middle and high latitudes, is two ridges-one trough, there is a low trough in the middle of Asia. The most severe successively heavy rainfall event in the summer 2004 was caused by upper-level trough on 15& 20 July.

亚欧中高纬环流形势为两脊一槽型，亚洲中部为一低压槽；夏季最强的一次降雨过程（7月15~20日）是高空低压槽前的持续性暴雨。

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The upper crust is mainly composed of slates, phyllites, schists, granulite of greenschist facies ( partly low-amphibolite facies) and granite intrusions, and sedimentary rocks at the top.

上地壳主要为绿片岩相（部分低角闪岩相）的板岩、千枚岩、片岩、变粒岩以及花岗岩组成，顶部为沉积盖层。

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The upper layers exhibited high contents of water, acetic acid and water-soluble compounds, low density, viscosity, calorific values and high distillable substances ( up to 65%).

上层具有高含量的水、乙酸和水溶性化合物，并且表现出低的密度、粘度以及热值，此外，上层的可蒸馏组分的含量很高，达到65%。

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