距离

Additionally, considering the additive methods with one evaluation function, we give the range of weights that ensure the fixedness of alternatives rank by the limited conditions on evaluation functions making sure the rank invariability on alternatives.

该方法通过给出有限方案集的非劣方案、潜在最优方案、邻近潜在最优方案以及竞争方案等定义，以Euclidean空间的距离为测度，用可变参数的最小参数变化量来描述任意方案到当前最优方案间的距离，给出了以距离为基础的定量化敏感性指数，并以竞争方案到当前最优方案的距离来衡量当前最优方案的敏感性。

When the generator polynomial of a given linear rank distance code possesses generalized continuous roots set, the sufficient condition that makes the given linear rank distance code forming rank distance BCH code is discussed.

他们指出当线性秩距离码的生成多项式的根集不是连续根集时，确定秩距离码的最小秩距离以及构做极大秩距离码是未解决的问题。

On the 3 rd day after operation, compared with group C, the latency period and swimming distance of group O, group Hup extended further, while compared with group O,the latency period and swimming distance of group Hup shortened (P.05);Compared with group C, the extending degree of the latency period and swimming distance of group O decreased on the 7 th day after operation.

结果 术后1 d进行水迷宫测试，与C组比较，A组、O组潜伏期和游泳距离均延长(P.05)；术后3 d，与C组比较，O组、Hup组潜伏期和游泳距离进一步延长，而Hup组与O组比较，潜伏期和游泳距离均缩短(P.05)；术后7 d，O组与C组比较，潜伏期和游泳距离延长程度缩小。

Firstly, This paper processes geometry filtration based on character of orbit's apogee and perigee after orbit model is analyzed and based. Secondly Space Debris is separated into two kinds, coplanar and not coplanar according as location interrelation of target and debris. In Dynamic filtration's processing, considering prediction time limit and orbit perturbation, secular effects which have increaser effect is considered so that some need catching danger time point is appeased, some law about time when target and debris pass intersectant line each other is inferred, when debris and object are in different plane and some similar law also is inferred otherwise. The time list is arithmetical progression. These laws can improve calculation efficiency remarkably; Lastly orbit predict is a course approaching least distance. Danger time point in the last step become beginning time point from which debris and object's position and velocity are calculated by SXP4 Model which is an analytic model.By result, determine that relative movement trend is closer or apart, farther calculate the interval apart from time when predictive least relative distance occurs. Least relative distance and time when least distance occurs is calculated finally. It is a fast approach course adopting varied interval.

本文在分析、建立轨道摄动计算模型的基础上，首先采用基于轨道远、近地点特征对大量编目在册的空间碎片进行初步几何静态筛选，然后根据碎片与目标轨道面的相对位置特点把碎片分为异面与准共面两种情况以进行动态筛选，在筛选过程中考虑到预报时限长度和轨道摄动影响，引入了轨道摄动中具有积累效应的长期项以满足危险时间点的捕捉要求，利用了长期项摄动变化线性的特点导出了碎片与目标异面情况下各自过交线的时间序列成准等差数列的规律性和准共面情况下类似的规律性，从而显著地提高了前期轨道筛选的计算效率；最后对剩余危险碎片和目标飞行器利用SXP4轨道预报模型在前期轨道筛选的基础上以各个危险探测时间点为预报的时间起点，并根据预报计算结果，分析目标和碎片在该时间点的运动趋势是相互远离还是相互接近，推出预计最小相对距离发生时刻相对此刻的时间长度，得到其随时间变化的局部最小相对距离以及危险距离发生的时刻和相对速度，这是一个采用变时间步长、快速逼近最小相对距离的过程。

When you close to them,you will find they are far away,they are apart.Over the way,light-year.

但是在你跨越所有的距离，以更近的距离去看那些星云时，你会发现，他们是如此地遥远，甚至超过了你用光年的距离看他们的距离。

Results:The distance from the front wall of sphenoid sinus to the nasal spine was 56.5±5.9 mm for left and 54.9±7.2 mm,44.3±6.5 ,,for left and 44.0±6.5 mm for right to nasion.The average distance from middle point of sphenoid saddle bottom to nasal spine was 74.5±6.4 mm for left and 73.8±6.8 mm for right,60.9±7.2 mm and 60.2±7.8 mm to nasion.

结果：前鼻棘至蝶窦前壁的平均距离：左侧：56.5±5.9mm；右侧：54.9±7.2mm；鼻根点至蝶窦前壁的平均距离：左侧：44.3±5.6mm；右侧：44.0±6.5mm；前鼻棘至鞍底中点的平均距离：左侧：74.5±6.4mm；右侧：73.8±6.8mm；鼻根点至鞍底中点的平均距离：左侧：60.9±7.2mm；右侧：60.2±7.8mm。

The average distance from middle point of sphenoid saddle bottom to nasal spine was 74.5±6.4 mm for left and 73.8±6.8 mm for right,60.9±7.2 mm and 60.2±7.8 mm to nasion.

结果：前鼻棘至蝶窦前壁的平均距离：左侧：56.5±5.9mm；右侧：54.9±7.2mm；鼻根点至蝶窦前壁的平均距离：左侧：44.3±5.6mm；右侧：44.0±6.5mm；前鼻棘至鞍底中点的平均距离：左侧：74.5±6.4mm；右侧：73.8±6.8mm；鼻根点至鞍底中点的平均距离：左侧：60.9±7.2mm；右侧：60.2±7.8mm。

The local decision space partitioning is given in the sense of maximum Bhattacharyya distance criterion. The optimality and the non-triviality of the partitioning scheme are proved. The reasonability of using Bhattacharyya distance as partitioning criterion is analyzed. The simulation results show that the partitioning method based on Bhattacharyya distance criterion is superior to that based on J-diversity criterion.

研究了基于 Bhattacharyya 距离准则的决策空间优化划分问题，求出了在 Bhattacharyya 距离最大意义下的决策空间划分方法，证明了这种决策空间划分方法的最优性和非退化性，分析了选择 Bhattacharyya 距离作为划分准则的合理性，并进行了计算机仿真比较，结果表明基于 Bhattacharyya 距离准则的决策空间优化划分优于基于最大 J-散度准则的决策空间划分。

In order to obtain the reliable and accurate headway distance data, a state space model for distance data filter is established and then a new data fusion and estimation algorithm based on Kalman filter principle is developed. Its recursion formula is obtained. Taking the distance measurements of machine vision and laser radar as inputs, this fusion and estimation algorithm can output more reliable and accurate fusion data in real time.

建立了距离滤波的状态空间数学模型，提出了一种新的基于Kalman滤波原理的距离数据融合估计方法，推导出融合估计的递推公式，对来自机器视觉和激光雷达的距离数据进行融合估计，以减少距离数据的噪声，提高其可靠性与准确性。

Methods Twenty-two pieces of temporal bone were taken for this study. The mastoid cavity was opened, scutum removed,"bridge" broken down, posterior wall of external auditory canal abraded and the related anatomic structures were fully exposed. The distance between the origin of facial nerve canal and the anterior border of round window （ OOFNC-ABORW ）, between the highest point of the facial nerve canal and the bottom of posterior mastoid sinus,and between the stapes head and round window niche was measured under operating microscope.

方法取成人颞骨22侧（左右各11侧），用耳科钻磨开乳突腔，去上鼓室盾板、断"桥"，磨低骨性外耳道后壁，充分暴露相关结构，在手术显微镜下测量面神经管垂直段起始部前缘至圆窗龛前缘的距离、面神经管最高点与后鼓室底壁之间的距离、锥隆起的高度（即锥隆起基底到锥隆起顶端的距离）、镫骨头至圆窗龛前缘的距离。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。