查询词典 distance formula

The formula group for the design of multi-phase micro Fresnel lens according to scalar diffraction theory was given and the transmission theory of spherical wave were used to deduce the relation of focal distance of the micro lens with spectrum resolution. According to the relation spectrum resolution is inverse proportional to focal distance given a certain incident wavelength and phase number, and the theoretic formula is consistent with reported experimental result.

光谱分辨率是评价衍射微透镜分光特性的主要指标，根据标量衍射理论，给出了多台阶位相型菲涅尔透镜的设计公式，并利用球面波的传输理论推导了微透镜主焦距与光谱分辨率之间的函数关系，得出在入射波长和位相台阶数一定的情况下，光谱分辨率与中心焦距之间呈反比；理论推导的结果与已发表的实验结果一致。

The dissertation includes the work as follows: Firstly, we present a random graph model with spatial reuse for a dense MANET which using directional antennas. The analytic formula of several important performance parameters for the MANET are obtained under the DSR routing protocol, such as the average flooding distance, the probability generating function of the flooding distance, the probability of a flooding route to be symmetrically valid, the average time to find a symmetrically valid route and the cost to successfully route a data packet to its destination. We compare the two models with spatial reuse and without spatial reuse by evaluating these parameters. It is shown that the spatial reuse model is much more effcctive in terms of the performance of the dense network with directional antenna, because the bigger is the degree of spatial reuse, the smaller is the average flooding distance.

在定向天线技术的支持下，建立了移动自组网络空间可重用的贝努利随机图模型，获得了DSR路由协议下平均泛洪距离的解析公式和泛洪距离的概率母函数：给出了有效对称路由概率、发现有效路由平均时间、成功路由代价等关键性能参数的解析分析；在网络性能参数定量分析的基础上，对空间可重用和无重用的网络进行了比较分析，结果显示空间重用度增大，则平均泛洪距离、路由发现时延、网络代价减少。

By establishing a model based on the law of infrared radiation transmission in atmosphere and the characteristics of infrared imaging system for the apparent contrast between the target and the background, and analyzing the model over two wavebands to formulate the distance measuring formula and the distance resolving power formula, a passive distance measurement method is proposed for aerial point target distance measurement.

提出了对空中点目标进行被动测距的方法。基于红外辐射在大气中的传输规律和红外成像系统的特性，建立了目标和背景的表观对比度模型。通过对两个波段上对比度模型的分析，推导出了测距公式和距离分辨率公式。理论分析表明，只要得到大气在两个波段上的消光系数，通过测量目标在两个波段、两个时刻上的目标表观对比度，即可计算得到目标距离和目标径向速度，而距离分辨率则取决于系统的对比度探测能力及相关参数。

This paper proposes a new distance formula of fuzzy numbers.

文章提出了一种新的模糊数距离公式。

If we had to do this again instead of trying to use the Euclidean distance formula to match words we would like to try do perform a correlation of the two fingerprints.

如果我们不得不这样做，而不是试图再次使用欧氏距离公式来匹配的话，我们想尝试做执行两个指纹的相关性。

X11x21+x12x22+x13x23=x1^2+x2^2+x3^2, this is the distance formula of 3D solid space

x11x21+x12x22+x13x23=x1^2+x2^2+x3^2，这就是三维实空间的距离公式

This article deduces the formula of distance on mean elevation plane measured and the formula of altitude difference when inclined distance and vertical angle are observed separately .

推导出了斜距和垂直角分开观测时计算平均高程面上的距离公式以及计算高差的公式，并在进行了精度分析的基础上，提出了能满足精度要求应采用的公式。

The new distance formula considers the density information of representative points, so the clustering result is more precise than those using the existing similar methods.

其中新的距离公式考虑到代表点的密度和它们之间的距离同样重要，故将密度信息加入到距离计算之中，从而使聚类结果更加精确。

Additionally, Inductive method is used for derivation of distance formula between center of mangnet sub and vertical well . Proposed the new algorithm for the bore hole path's direction detection.

研究结果表明偏离角算法与距离计算关系式能够确定磁短节与洞穴井之间的空间位置，对煤层气井眼连通的算法进行了改进。

We derived the leverage matrix of one individual which was divided into two parts : The marginal leverage of the fixed-effect and random-effect, and the Cook distance formula for the case that all the data of an individual is deleted.

具体地说，本文主要工作如下：(1)第二章我们从频率派的观点出发，对模型进行了统计诊断分析，讨论了模型的杠杆值及数据删除模型，分别给出了单个个体的杠杆矩阵与删除单个个体情形时的Cook距离公式。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。