点密度

点密度加权FCM算法的聚类有效性研究

Research of Clustering Validity on Dot Density Weighted Fuzzy C-Means Algorithm

之后，通过散点密度来控制散点的生成。

It uses dot density to control the procedure of generating dots .

采用槽管式分酸器，分酸点密度为43个／m2，设可调闸板以保证各槽酸量均匀；

Trough acid distributor is adopted with acid distribution density of 43 points per square meter .

对不同采样密度下K值空间估值精度的评价表明，当采样点数目均匀地减少一半时，即4个/km2的样点密度下，K值估计误差仍然可以控制在25%以内。

The relative error of K values is less than 25 % when half of the total samples , 4 samples per square kilometer , are taken .

提出用水-羽毛接触点密度（Dp）的指标来描述鸟类廓羽表面的防水性能。

A surface variable , density of water-feather touching points ( Dp ) was proposed in this paper to express surface property of water repellency of contour feather .

根据地质灾害详细调查数据和DEM数字高程模型，建立了灾害点密度、坡型、坡度、坡高、植被、人类工程活动、降雨等7个因素构成的地质灾害危险性评价指标体系。

Set up geological hazard indexs system of 7 factors include geological hazards points density , slope shape , slope gradient , slope height , vegetation , human engineering activities and rainfall .

通过对Poisson方程的求解，探讨配点密度和紧支域大小对解精度的影响。

The numerical solutions to a Poisson equation using this method show that the computational accuracy is influenced by the density of the collocation points and the radius of the compactly supported domain .

实测资料分析表明，当资料点密度较低时，引入约束条件和要求连续均有助于提高解的稳定性，但也人为降低了解的客观性，使各历元节点ERP解算结果之间相关。

Observation data analysis shows that when the data points are not very dense the constraint and the continuation requirement are helpful to the improvement in the stability of the solution , but degrade the independence of ERP solutions at epoch nodes as well .

但CNT场发射器件的场发射性能远未达到理论计算，如发射电流密度较低、发射点密度不够高、电子发射不够稳定等问题，在生长机理上也存有争议。

Up to date , however , field emission properties of CNT are far from theory estimated , such as a low emission site density and unstable electron emission . There also are numerous argues in the understanding of growing mechanism .

另外，选择了丘陵区、山区、沙漠区及平原区的典型近地表地质模型，分别采用500m、1000m和2000m的控制点密度进行了静校正量误差分析。

The field statics errors of typical near-surface geologic models in hilly land , mountainous district , desert and plain are analysed by taking control points in 500 m , 1000 m and 2000 m intervals respectively .

并对绰尔试验点密度为30cm×40cm的3a根2a干苗在生长期内的苗木生物量变化及土壤养分月动态进行了研究。

Furthermore , the seedling biomass and monthly dynamic changes of soil nutrients of 3 a root with 2a stock seedling with the density of 30cm × 40cm , in Chao'Er experiment sites were reviewed in this paper .

提高喷淋点密度，有利于提高液体的分配效果；

High spraying point density favors improvement in liquid distribution ;

浅谈全站仪测图精度控制和控制点密度

On controlling of total station mapping accuracy and density of controlling points

点密度函数加权模糊C-均值算法的聚类分析

Clustering Analysis of Dot Density Function Weighted Fuzzy C-Means Algorithm

静态立体图视差图形与随机点密度关系的研究

The Relationship between Static Disparity Graph of Stereogram and Density of Random Dot

小尺度振幅调制点密度对激光传输的影响

Density of Small Scale Amplitude Modulation Spot and Its Effect on Beam Propagation

87.5%乳腺癌的钙化点密度不均、大小不一；

Heterogeneous density and different size were found in 87.5 % of breast cancer .

代数体函数的公共值点密度与唯一性定理

The Density of the Common Value-points of Two Algebroidal Functions and the Uniqueness Theorems

从各子块中取出数据点密度较大的像素组成样本块。

Then select certain larger density pixels in each subset to construct corresponding swatch .

首先讨论了体素离散化的拓扑有效性和精度要求，并在此基础上提出了依据主曲率控制离散点密度的方法。

First , " topological validity " and precision requirements of a faceting process are discussed .

通过对样品的实际发射面积估算，得出发射点密度为6×104cm-2。

And the emission spot density was estimated to be about 60 000 per square centimeter .

但迄今为止，碳纳米管场发射器件仍未上市，主要是在发射性能上还存在点密度不够高、电子发射不够稳定等问题，在发射机理的理解上也存在许多争论。

Up to date , however , field emission properties of CNTs are not satisfied for applications .

实验结果显示出该薄膜具有较好的场电子发射性能，发射点密度高达1×105/cm2以上。

The emission site density of the film more than 1 × 10 5 / cm 2 was obtained .

本文研究了一种基于灰度跳变定位车牌区域的新方法，引入跳变点密度概念。

This paper studies a new method Based on Gray Level Jumping . Raise a concept of transition point density .

作者注意到经典袭扰系数法仅仅考虑历史意义上的地质灾害的点密度、面密度和体密度，而没有考虑到地质孕育发生的背景&地质环境因素，而这一点是不可忽略的。

But the traditional method neglects the importance of geology environment - the gestation and development background of geology hazards .

因此，用泰森多边形点密度作为单木生长指标，具有明显的生物学意义。

In that case , using point density of Thiessen Polygon as growth index of individual stand is important in biology .

并且研究了非晶碳薄膜的场发射特性，计算了薄膜的功函数、实际发射面积和发射点密度。

The field emission properties were studied , and the work function , actual emission area and density of emission spot were calculated .

对车载激光扫描系统获取的距离图像的分割进行研究，提出利用投影点密度进行距离图像分割的方法。

A modified distance map ( DM ) Snake model based on the edge flow was proposed to segment ultrasonic images of lymph nodes .

逆向工程中曲线的测量应遵循采点密度随着曲线曲率变化而疏密不断变化这一原则，并应根据对离散点的特征进行分析来确定拟合函数的类型以及进行拟合回归。

Curve measurement in RE follows an important principle that the density of collected data points should be varied in accordance with the change of curvature .

本文根据多点密度试验林的长期观测资料，对黑杨派南方型杨树密度效应规律进行了系统研究。

According to the investigated data from various man-made density experimental forests in China , the authors have systematically studied the density effect of man-made southern type poplar forests .