覆盖率

The vegetation coverage here should be over 90%.

这里的植物覆盖率应该达到90％以上。

And the best water-conserving and flood-controlling forest cover is the main index for regional scale diposition. While the small watershed scale should consider the forest type. And the stable forest structure is the key factor for the disposition in slope and gully scale.

指出在区域尺度上，主要以理水调洪森林覆盖率为区域空间配置的指标；在小流域尺度上主要考虑防护林林种的配置方式；而在坡面和沟道尺度上，主要考虑防护林树种和植被群落的稳定林分结构设计。

The resulting whitecap coverage is related to wind speed and wave average period.

在波面位移为正态过程的假定下，推导出一种以平均周期和风速为参量的白浪覆盖率公式。

As a wave age is often used to describe the wave state in practice, whitecap coverage is ex-pressed as a simple function of the age.

考虑到在实际应用中，经常需要用波龄描述波浪的状态，将白浪覆盖率表示成一种形式简单的波龄的函数W=1-Φ3。

The introduction of whitecap-covered percentage and its relations with effective dielectric constant and depth of whitecap make physical model press close to realism.

在这个物理模型下，白冠层的有效介电常数可通过白冠覆盖率及其厚度与风速联系起来，使理论模型更贴近于现实。

Therefore, in this thesis, a new set of models about breaking probability and whitecap coverage is set up using this breaking criterion. Under the assumption of linear ocean waves, and in the light of the theoretical framework about the probabilistic distribution of wave characteristics (Sun Fu 1988), several probabilistic distributions of wave characteristics that is necessary for the estimation of breaking probability and whitecap coverage are derived.

在线性海浪假设下，基于孙孚（1988）关于三维海浪要素统计分布的理论框架，具体给出二维海浪波峰处质点水平速度和表观相速的联合分布等分布函数，在此基础上，根据运动学判据，分别建立起风浪破碎率和白浪覆盖率的理论模式。

Part Ⅰ: Since the study about breaking onset criteria base on the downward acceleration or on the wave slope shows great discrepancy, the models that estimating breaking probability and whitecap coverage according to these two criteria are problematic.

第一部分：因所采用的动力学或波陡判据的不确定性和海浪谱四阶矩的难以确定，现已提出的关于风浪破碎率和白浪覆盖率的统计模式有一定的不确定性。

Employing scattering modes of Kirchhoff approximation and two-scale randomly rough surface in active remoter sensing and physical definition about emissivity in passive remote sensing , the relations of between backscattering cross , effective emissivity and polarization , incident angle , wind speed and whitecap-covered percentage are calculated and show the degree of whitecap affect microwave remote sensing.

在主动遥感方面采用KA模式和双尺度随机粗糙面散射理论模式，在被动遥感方面利用发射率的定义得到有效热发射比，在本文的模型下计算了热发射比以及极化状态的后向散射系数与极化方式、入射角、风速、白冠覆盖率等各参量间的关系，讨论了白冠层的存在对微波遥感模式的影响程度。

At present Austrian forest is enclothed rate already amounted to 46.2%, the wood that has 2/3 is close wildwood, fall greatly under grow quantity.

目前奥地利森林覆盖率已达46.2%，有2/3的森林为近自然林，采伐量大大低于生长量。

The energetic and structural properties of SiH_2 adsorbed on single dimer vacancy of the Si(100)-c(4×2) surface, the structures of 0.5ML hydrogenated Si(100) surface and the deposition and diffusion behaviours of silicon adatom on the H-terminated Si (100) surfaces have been studied by using empirical tight-binding total energy calculations.

本文采用经验紧束缚近似方法研究了SiH_2在Si(100)-c(4×2)表面单空位处的吸附结构、0.5ML覆盖率氢化的硅表面结构以及附加硅原子在H-terminated Si(100)表面的沉积吸附行为。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。