In the early stage of subway design because of many unknown variables and the complicated character of subway station heat load calculation it is hard to use a simplified mathematical model to get the precise result .

由于在地铁早期计划阶段，很多参数都是 未知的，同时由于地铁车站热负荷的 复杂性，要通过一个简化的数学模型来求它们的精确解是很困难的。

The unknown function is approximated by radial point interpolation method in space discretization and difference schemes are adopted in time discretization . The algebraic system equations with bandwidth character are built and it is effectively solved by successive overrelaxation ( SOR ) method .

所 求 未知函数的空间插值采用径向基点插近似，而时间导数离散采用差分格式，建立具有带宽 特性的代数方程，采用逐次超松弛迭代法（SOR）有效地求解所得到的代数方程。

The chaotic time series behave unknown chaotic character and have a big data set which requires the improvement of the traditional local average nonlinear noise reduction method . A nonlinear local approximation noise reduction method is presented .

针对混沌时间序列具有的动力 特性 未知、长系列等特点，对常规局部平均去噪方法进行改进，提出一种非线性局部逼近去噪方法。

Using bioinformatics to identify the unknown character of HIV sequence in a plasmid

利用生物信息学 确定质粒中所含HIV基因片段相应 特性

The only part remaining is the handling of error reporting ( such as an unknown parameter flag character or a numeric value out of range ) .

最后剩下的部分就是处理错误报告（例如一个 未知的形参标记 字符或者一个超出范围的数字值）。

The method in the first place determines frame length of unknown stream by inter-frame similarity and then makes use of character frame templates and the corresponding match threshold for stream whose frame length is identical .

帧长结合特征帧方法首先通过帧间相似度判定帧长，对相同帧长的不同编码方式再利用 特征帧模板和相应的匹配度门限值进一步 识别。

The critical elevation method was adopted to deal with the unknown radar parameters and combine those parameters into a radar character constant .

针对低重频PD雷达对目标的发现概率计算过程中所遇到的问题，采用临界仰角法处理雷达的 未知参数，将之合并为雷达系统 特征常数。

The distance between an unknown character and every candidate is calculated .

然后计算出 待 识字与每个候选 字 的 识别距离；