1) kernel density
核密度
1.
When density function f1(x) is unknown, an estimation of α and f1(x) using the way of nonparametric kernel density estimation method can be obtained.
当f2(x)已知,污染系数α和密度函数f1(x)未知时,采用非参数的核密度估计方法,给出f1(x)及α的估计。
2.
The Cauchy principal value of intergral with a Kernel density having infinitely discontinuous points on the real axis was discussed.
讨论在实轴上核密度具有无穷个间断点的Ｃａｕｃｈｙ主值积分的性质，在一定条件下，得到了一些结果。
3.
In order to detect the boundary points of clusters effectively,this paper presents an adaptive grid kernel-density-based boundarypoints detecting algorithm for spatial database with noise,ADAPT,which uses the concept of grid kernel density for the accuracy of grid density and a novel adaptive strategy for neighbor selection based on spatial object distribution.
为了快速有效的检测聚类的边界点,提出基于网格核密度的自适应边界点检测算法ADAPT(An Adaptive Grid Ker-nel-Density-Based BoundaryPoints Detecting Algorithm for Spatial Database with Noise),使用网格核密度更精确地拟合网格在其邻域内的密度,采用自适应选取网格近邻策略更好地反应对象的空间分布特征。
3) nucleation density
形核密度
1.
The diamond nucleation density is remarkably improved on WC-Co substrate by Copper/Titanium intermediate layer.
Cu/Ti作过渡层明显的提高了金刚石在硬质合金基底上的形核密度。
2.
The nucleation density is more than 107cm-2 on Al2O3 and YG8 at 700~900℃, while less than 106 cm-2 on steel T10 with chromizing layer.
硬质合金和三氧化二铝的热稳定性都比钢渗铬层好,在700~900 ℃能获得107cm-2以上的形核密度,而钢渗铬层超过800 ℃后,形核密度低于106 cm-2。
3.
The results show that the nucleation density drastically increases when the carbon concentration is between 2% and 3%,while the nucleation density is quite low as carbon concentration is lower than 2%.
采用热丝化学气相沉积(HFCVD)方法在Mo基体上沉积金刚石薄膜,使用扫描电镜(SEM)和X射线衍射(XRD)对薄膜样品进行分析检测,研究了表面形核密度随碳源浓度的变化。
4) nucleation density
成核密度
1.
8%, tensile intension and fiexural strength of nucleated polypropylene resin increases 15%, flexural modulus increases 35% and crystallization peak temperature increases 10 ℃ as well as nucleation density calculated from nonlinear Volterra integral equation increases 10.
8% (质量 )时 ,树脂的拉伸强度和弯曲强度提高了 15 % ,弯曲模量增加了 35 % ,结晶温度提高了 10℃ ,由非线性 Volterra积分方程得到的成核密度提高了 10 6倍 ,而且成核聚丙烯的成核密度与其材料的力学性能之间存在着线性关系 ,即随着成核密度的增大 ,材料的拉伸和弯曲性能呈线性的增
2.
The influence of micro powder grain size of diamond used to substrate abrasive surface pretreatment on the diamond nucleation density is large on single crystal silicon substrate,but it is not too large on W and WC 6%Co cemented ca.
用于衬底研磨预处理的金刚石微粉粒度对金刚石在单晶 Ｓｉ 片上的成核密度有较大影响，而对在 Ｗ Ｃ６ ％ Ｃｏ 硬质合金和金属 Ｗ 上的成核密度没有太大影响。
3.
The nucleation density was three orders higher than it on smooth silicon substrate with no pretreatment.
通过用电化学法预先沉积一层碳膜的方法，利用热丝化学汽相沉积法使金刚石在光滑硅片上的成核密度达到１０７ｃｍ－２左右，与未镀碳膜相比提高了近３个数量级。
5) kernel density tree
核密度树
6) nuclear density meter
核密度计
补充资料：非密度制约因素(见密度制约因素)
非密度制约因素(见密度制约因素)
l焦非密度制约因素见生态因素、密度制约后
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条