查询词典 limitation

However, in some special water areas the utilitization of StreeterPhelps model has some limitation as confirming reaeration coefficient often comes from tests in rivers with fast water flow speed with no consideration of wave effects. Furthermore, in practical research in Three Gorges Reservoir, the changing rule of COD appears abnormally. In some water areas far from pollution source, the value of COD changes with time, but does not follow the exponential attenuation rule. This phenomenon can not be explained by former modified StreeterPhelps model.

StreeterPhelps模型是目前进行河流水质研究常用的物理模型，具有良好的理论和实用价值，然而在某些特定水域，该模型的应用受到限制，主要原因是复氧系数的取定多在水流速度较大情况下得到的，而未考虑水面波动对复氧系数的影响，另外，在实际研究过程中发现三峡库区COD变化的规律出现异常：在离排污口相当远的水域，COD随时间变化趋势并不是指数衰减，而是在某个常值附近微小摆动，以往很多修正过的StreeterPhelps模型都无法解释这个现象。

Practically this is not a limitation as most aircraft have a rearward moving center of gravity when you load them.

实际上这并不是一个限制，因为大部分的飞机有一个向后移动的重心当您载入他们。

This new classification breaks the absolute limitation between the verb and adjctive reduplication and combine the two sorts to a whole.

这种新的分类打破了动词和形容词重叠之间的绝对界限，沟通两者使其成为一个整体。

But there is limitation in getting the surface reflectivity of visible channel.

但在获取可见光通道地表反射率时存在局限性。

So folk Medium-and-small-sized Enterprises have become necessary part in national economy and society development Howerer , because of the limitation of economic power , financial oppression has become the important factor in refrainment folk investment from ulterior progress with the enlargement of investment scale .

但是由于民间投资主体目前的经济实力有限，随着投资规模的逐渐扩大，金融压制等因素已成为制约民间投资进一步发展的重要因素。

To construct a data warehouse supporting group decisions, a model of multi-data warehouse supporting group decisions was proposed based on limitation analysis of the traditional data refresh algorithm and data warehouse model.

为了构建支持群体决策的数据仓库，分析了传统数据更新算法及数据仓库模型的局限性，提出了一个支持群体决策的多数据仓库模型。

To complement the limitation of the acoustic location,the mechanism of passive vibration location on the ground by regular triangle array is given.

为了补充声探测系统在特殊情况下的不足，根据正三角震动阵列定位原理，推导了正三角震动阵列对地面震动目标的定位公式。

RCP is regarded as an assistant method in deep hypothermic circulatory arrest in that it provides partial brain blood flow,maintains a low brain temperature,optimizes cerebral metabolic function during DHCA by supplying oxygen and some nutrient and removal of catabolic products;it also reduces the incidence of cerebral embolization by flushing out air and particulate microemboli from the arterial tree before the reinstitution of antegrade perfusion,thus prolonging the limitation of safety of DHCA.But brain edema probably happens to restrict the clinical use of this method.

上腔静脉逆行性灌注是深低温停循环脑保护的辅助手段，已证明在低温状态下，它为脑部提供低流量血流，维持脑部低温状态；提供部分氧和营养物质，运走代谢产物；减少气栓及栓塞的发生，从而延长了深低温停循环脑保护的安全时限，而脑水肿的危险性限制了该方法在临床的应用。

Gabor-ring is often used in texture feature extraction, but it is based on the assumption that texture is narrowband signal and can not applied to most actual textured images that have more than one center frequency in power spectrum. To overcome the limitation of existing method, an improved method is proposed. According to this method, Gabor filters are constructed in accordance with the spectrum feature vector of texture, and a relaxation parameter is used to determine the effect of difference filters so as to integrate the frequencies and phases into the process of extraction.

Gabor环（即在频率域成环形分布的Gabor滤波器组）常被用于提取图像纹理特征，但它是以"纹理是窄带信号"为基础的，实际的纹理图像并不能很好地满足"窄带信号"的假设，用一个中心频率来描述一种纹理对能量集中在多个频率点的纹理图像往往不能取得理想的效果，而根据频谱特征值向量构造Gabor环的改进方法，通过松弛因子的加入改变不同滤波器的作用强度，综合考虑了多频率多相位对纹理特征提取的影响。

The theory on remediable damages can conquer the limitation of the theoretic tool, conform to the trend of damage redress idea, and will impose great impact to the theory of tort law.

可救济性损害理论的引入，有效地弥补了过错这一侵权法理论工具的缺陷，顺应了损害救济理念的发展趋势，给侵权法理论带来了巨大的冲击。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。