未知

In order to predict gas outburst accurately, mathematical geology model of coal and gas outburst was set up by the second theory of quantification , and which was applied and validated in Zhongmacun Mine of Jiaozuo Mining Group Company.

在焦作中马村矿应用研究结果表明：由于煤与瓦斯突出的分区分带主要受地质条件控制，运用数量化理论Ⅱ，可以借助已知瓦斯突出类型的若干地质变量，建立该矿井煤与瓦斯突出的数学地质模型，并预测未知区的瓦斯突出，这可提高瓦斯突出预测的准确性和可靠

In the ground unit domain, a yellow quatrefoil frame is used to denote unknown affiliation, a blue rectangle frame to denote friendly affiliation, a green square frame to denote neutral affiliation, and a red diamond frame to denote hostile affiliation.

在地面单位领域，黄色的四瓣花状线框被用于表示未知关系，蓝色的矩形线框表示友邻关系，绿色的正方形线框表示中立关系，红色菱形线框表示敌对关系。

The noninformative prior of the standard deviation of error terms was introduced for Bayesian analysis. Then, given the prior density of the random coefficients in the degradation path model, the Markov Chain Monte Carlo method was adopted to generate samples of joint posterior distribution of random coefficients and unknown standard deviation.

为了处理未知的误差项方差，引入相应的标准差的无信息先验分布，并进一步结合退化轨道模型中随性参数的先验分布，利用马尔可夫链蒙特卡罗方法得到随机参数及误差项标准差的联合后验分布的采样值，进而实时预测产品在未来一段时间内的可靠度。

The basic characteristic of the linear model is the unknown parameter of the model is linear and it also includes the linear random error.

线性模型的基本特征是，模型的未知参数是线性的，同时又线性的包含了随机误差项。

Life is Random ,you will never know what will be the next.

生活是未知的，你永远不知道接下去会发生什么。

Many real domain applications of MAS, such as information retrieval and data mining on the WWW can be reduced to the problem of searching in an unknown environment.

现在 MAS中的许多具体应用问题也可以归结为对未知环境的搜索。比如 WWW上的信息检索、数据发掘等。当存在信息缺失的情况下，如何设计 MAS系统使之更为有效地搜索是目前 MAS研究的一个重要课题。

So variable but real the fate is.

看那些匆匆的人流，携带著大包小包，奔向一个个或熟悉或未知的远方，我站在那里常有一种说不出的感动，生活是这样的热烈而匆忙，命运是这样多变而真实。

A new method for extracting the parameters of unknown Frequency Hopping signal is proposed based on reassignment SPWVD.

提出了一种基于重排平滑伪Wigner-Ville分布的未知跳频信号参数盲估计方法。

The genetic algorithm pays attention to unknown area search . It has high speed and relative low precision. It will not get into local extremum. The BP algorithm searches the area that include whole-space minimum. It can improve speed and recision.

遗传BP算法利用遗传算法进行全局搜索，注重搜索未知区域，处理速度快而对精度要求不高，不易陷入局部极小点，而利用BP算法搜索有最优点的区域，提高搜索速度和精度。

Based on the Gaussian kernel function, the recursion formula of bandwidth is derived.

在未知总体分布的情形下，给出密度核估计中选择窗宽的一个新方法，并在选取高斯核的情形下，推导出计算窗宽的递归公式。

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％。