查询词典 number one

The "Prufer" code of such a tree is built as follows: the leaf (a vertex that is incident to only one edge) with the minimal number is taken. This leaf, together with its incident edge is removed from the graph, while the number of the vertex that was adjacent to the leaf is written down.

从题目描述我们可以知道，对于一棵树，每次都找到编号最小的叶子结点，然后输出它的双亲结点的编号作为 Prufer Code，同时删除这个最小的叶子结点为下一次输出 Prufer Code 做准备。

Software reliability is one of the most important quality characteristics. The definition of software assessment is discussed, the mechanism of software failures is described, 2 software reliability assessment methods based on triangular fuzzy number arithmetic operations and trapezoid fuzzy number arithmetic operations respectively are proposed, and some examples to use these methods are given.

软件可靠性是航天型号软件的重要质量特性之一，本文阐述了软件可靠性评估的定义，讨论了软件的失效机理，提出了基于三角形模糊数算术运算和基于梯形模糊数算术运算的软件可靠性评估方法，并给出了使用这些方法的示例。

When Ray Bolger starred in "Where's Charley?" on Broadway, one night he blew a cue onstage in a dance number, in front of an audience ... so he deliberately tripped his leading lady, Beverley Bozeman, sprawling her on the stage and leaving her to figure out how to save the number with the audience watching.

的时候，在台上表演的一个晚上，他在一个观众面前跳错了舞步，之后他就特意的把他的女舞伴Beverley Bozeman给绊倒，让她躺在舞台上去想办法怎样在那个观看的观众面前去补救刚才的舞步。

The proposed method not only reduces the number of binary SVMs for one classification,but also reduces the number of support vectors.

该方法一方面减少了一次分类所需的两类支持向量机的数量，另一方面减少了支持向量的数量。

The results show that cattle grazing in rubber plantations increased the population number of land leech by 3.43-folds within one year, while chemical weedings in rubber ledge contour and total area in rubber plantations reduced the population number by 29.82% and 50\^21%, respectively.

结果表明，橡胶园内牛群放牧使海南山蛭种群数量 1年内增加 3 43倍。化学除环山行杂草、化学全面积除杂草使山蛭种群数量在 1年内分别减少 2 9 82 %和 5 0 2 1%。除草剂混入杀蛭农药，使山蛭种群数量 1年内减少 73 0 2 %。

In section three, the conception of the Peterson graph is incited and the fractional chromatic number and the chromatic number of one kind of them are given.

在第三部分中介绍了当k=2时的广义Peterson图的概念，给出了其中一类图的分数色数以及顶点色数。

This thesis has mainly contributed two results in theory: one is that the covariance matrix is not positive definitive if the number of sampling is least than the number of variables, the other is that the covariance matrix of discrete sample is positive definitive if and only if the sum of every random column vector of data matrix is non I-linear combination.

本论文在理论上，主要得出两个新的结果：ⅰ抽样调查中，若样本的个数少于变量的个数则样本协方差矩阵恒为非正定；ⅱ离散型样本协方差矩阵正定的充要条件是样本资料阵的各随机列向量是非I-线性组合。

The main job and contribution of this paper are as follows:Based on narrowband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, compute the cross-correlation function of FH signals from multichannels, then we get the cross power spectral density matrixCSDM Secondly, select the hops of FH signals from the CSDM via processing and analyzing the CSDM, meanwhile reduce the influence coming from noise, fixed frequency signal and other interferences; Lastly, estimating the DOA of every hop and according to the DOA, we can separate the hops, get the number of FH signals and their parameters. Propose a new method for designing the threshold in FH signal detection. This method makes it easy to get the threshold by theoretic computing and it can extremely reduce the interference of non-FH signals.Based on broadband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, get the DOA of the signals by wideband spatial spectrum estimation; secondly, separate the signals by spatial filtering using wideband beamformer; Lastly, we propose two methods for FH signal blind detection and blind parameter estimation, one is for several constant hop-rate FH signals whose dwell-time are different and another is for a single FH signal whose hop-rate is alterable.By employing spatial interpolation in broadband signal beamforming, it can reduce the number of antenna elements and corresponding RF modules, A/D converters, etc. It can also eliminate the mutual coupling between antenna elements while getting the narrower main beamwidth and lower sidelobe level.

本文的主要研究工作和贡献如下：●提出了一种基于窄带处理的FH信号盲检测和参数盲估计的实现方法，即首先求出多路信号之间的互相关，进而得到互功率谱密度矩阵，然后通过对CSDM进行对折处理来抑制噪声、定频信号及其他干扰的影响，并将所有属于FH信号的hop(每一跳的驻留时间在时频图上持续的线段)从CSDM中筛选出来，最后用阵列信号处理中的到达方向估计理论在频域中估计出各个hop的方向参数，利用方位信息完成FH信号分离并得到FH信号的数目及其各自的参数集；●提出了一种确定FH信号检测门限的策略，该策略不仅使得检测门限能够通过理论计算得到，而且还显著地抑制了非跳频信号的干扰，从而能有效地检测出FH信号；●提出了一种基于宽带处理的短波FH信号盲检测和参数盲估计的实现方法，即首先利用宽带空间谱测向技术得到接收信号的DOA，然后采用宽带波束形成技术对特定方向进行空间滤波，实现多个信号的分离，最后分别提出了两种FH信号的盲检测和参数盲估计方法，第一种方法适用于空间某个特定方向上存在着几个驻留时间不同的恒跳速FH信号和其他干扰信号的混合信号，第二种方法适用于空间某个特定方向上仅含一个可变跳速的FH信号和噪声的混合信号；●将空间插值的概念和宽带波束形成技术结合起来，提出了一种基于频域处理的宽带恒定束宽的波束形成方法。

One day, when you dail my number, it will tell you the number is no longer existed.

某一天，你拨我的电话号码，语音告诉你我已经停机。

Needless to say, the number of acquaintance increases with one's age. The older one gets, the more wildly one traveled and the more work experience one has, the more acquaintances he is supposed to have.

不消说，像是的人数是随了年龄增加的，一个人的年龄越大，走过的地方当过的职务越多，相识的人理该增加了。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。