background density
英 [ˈbækɡraʊnd ˈdensəti]
美 [ˈbækɡraʊnd ˈdensəti]
网络 背景密度; 背景[光]密度; 背景浓度
双语例句
- Small ripples in the temperature of the cosmic background radiation are thought to be evidence of slight fluctuations in the density of the early Universe, which resulted in the formation of galaxies.
而宇宙背景辐射的气温波动则被认为是宇宙早期密度轻微变化的证明，正是这种密度变化才促使了星系的形成。 - The mottled look of the Cosmic Microwave Background radiation is the result of differences in temperature and density.
宇宙微波背景图的斑点是由于温度和密度所造成的。 - A new background model of non-parameter kernel density estimate was presented on the basis of abundant study on algorithms of moving object detection.
在充分研究现有运动目标检测算法的基础上，提出了一种新的非参数核密度估计背景模型。 - Moving object detection method using background Gaussian kernel density estimation
利用背景高斯核密度估计的运动目标检测方法 - As the minimum ratio method [ 1] for segmenting object image from the background eventually gives rise to excessive error, the weighted composite density comparison approach is proposed as a remedy.
压电加速度计横向灵敏度比超差解决方法为消除最小比值法在从背景中分离目标时所产生的过分大的误差，文中提出了混合密度加权比法。 - Objective To investigate the effects of the different levels of 131 I and 99 Tc m background in the body on bone mineral density ( BMD) measurement in dual energy X ray absorptiometry ( DXA).
目的探讨体内131I、99Tcm放射性本底对双能X线吸收法（DXA）骨密度（BMD）测定的影响。 - Second, the investigation of wave propagation characteristic in periodically magnetized uniformity plasma is done, in light of numerical calculation, to analyze the effect of additional magnetic field amplitude, background magnetic field and plasma density changing on the propagation characteristic.
对电磁波在周期磁化均匀等离子体中的传播特性进行了研究，通过数值计算分析了不同外加磁场幅值，背景磁场以及不同等离子体密度对波传播特性的影响。 - More, the investigation of wave propagation characteristic in round waveguide filled periodically changeful plasma in density is done, by numerical calculation, to analyze the effect on the propagation characteristic when background plasma density and the amplitude of plasma density change.
研究了电磁波在填充密度周期变化等离子体金属圆波导中的传输特性，通过数值计算分些了不同等离子体密度和背景密度情况下对波的传播特性的影响。 - Locally weighted linear regression normalization can effectively reduces influence of background noise for depend-intensity and high density chip;
局部加权线性回归标准化方法在依赖于强度的高密度芯片中可以很好地减少背景噪声强度带来的影响； - A multimodal background model based on binning kernel density estimation
基于分箱核密度估计的非参数多模态背景模型 - In chapter one, we introduced some background material and research results that have obtained of the nearest neighbor density estimator.
第一章介绍了最近邻密度估计的背景、意义、研究现状以及国内外有关最近邻密度估计的研究成果。 - BACKGROUND: Bone mineral density ( BMD) measured with ultrasound bone densitometer lacks the criteria for clinical signs of independent application of quantitative ultrasound ( QUS).
背景：应用超声骨密度仪检测骨密度缺乏定量超声独立使用的临床指征标准。 - The degree of hysteresis effect in Pd-H system depends on the background density in the sample, so it is the strongest in sponge Pd particle.
海绵Pd颗粒中的压力迟滞效应最明显，材料本底缺陷密度决定不同形态Pd-H体系的压力迟滞效应的大小。 - The following main conclusions are drawn: There are some background variations of gravity field and conditions of density anomaly in the reservoir;
主要结论有：库区存在一定的重力变化背景和地壳密度变异条件； - Background Density Characteristic of the Main Greenhouse Gas Near-surface in Tai Lake Basin
太湖流域近地表主要温室气体本底浓度特征 - Effects of background plasma density on multi-photon ionization
等离子体密度对多光子电离的影响 - SAR differential interferometry is an up-to-date measurement technology for terrain deformation. In this dissertation, the background and the significance of differential interferometry for dense plasma density measurement were stated.
本文阐述了激光差分干涉测量稠密等离子密度技术的研究背景和意义，综述了国内外等离子体密度测量技术的研究现状。 - The basic principle and quantitative characterization approaches of infrared background clutter are presented in this paper. The focus is put on the two classical metrics used in machine vision systems: background power spectral density ( PSD) distribution model and wavelet.
介绍了红外背景杂波的基本概念及机器视觉系统中的两类红外背景杂波量化方式：基于背景功率谱密度（PSD）分布模型和基于小波变换。 - At the same time, it was showed that different laser wavelength or different electron background density could affect filamentation process.
计算结果表明：入射激光强度、入射激光波长及等离子体背景密度是影响会聚强度的重要因素。 - The principle and method for measuring the resistance under zero background magnetic field, critical current density and mechanical intensity are presented and some results are given.
本文介绍了其零场电阻，临界电流密度及机械强度性能的测量原理和方法，并给出了测量结果。 - The background of phantom is the NaCl solution with different density.
背景为不同浓度的NaCI溶液。 - BACKGROUND: Synaptic density, a key index of structure and function of brain tissues, is related to cognitive function.
背景：突触密度是脑组织结构和功能的重要指标，与认知功能密切相关。 - A study of the effects of different levels of~ ( 131) I and~ ( 99) Tc~ m background in the body on dual energy X-ray bone density measurement
体内~（99）Tc~m和~（131）I本底对双能X线骨密度测定的影响 - In rare plasma, the strength of the wake-field depends on the background plasma density, while the maximum wake potential of wake-field is dependent on it.
同时发现在稀薄等离子体中激发的尾波势场与等离子体的密度几乎无关，而激发的尾波场最大电场强度与等离子体的密度有关。 - The main research contents are as follows: 1) This thesis proposed a new algorithm using Time Information Window-Kernel Density Estimation ( TIW-KDE) for background dirt, large amount of calculation in the background updating phase of the classical non-parametric kernel density estimation.
其研究主要内容如下：1）针对经典的非参数核密度估计算法在背景更新时引起的背景污染和计算量大等问题，提出了基于时间信息窗的核密度估计（TIW-KDE）算法。 - The main achievements we got are listed below: ( 1) We present a foreground feedback strategy to construct a background and foreground modeling using kernel density estimation.
本文所做的工作主要集中在以下几个方面：（1）本文提出了一种利用前景反馈增强策略的改进核密度估计背景前景联合建模方法。 - Effect potential and free energy of sine-Gordon-Thirring model are derived on black hole background, energy density fluctuation of Fermi matter are calculated in weak and strong coupling cases. Influence of gravitational field perturbation for Fermi matter is also analyzed. 3.
在黑洞背景下推导了sine-Gordon-Thirring模型的自由能与等效势，计算了弱耦合和强耦合情况下费米物质的能量密度，分析了引力场扰动对费米物质能量密度涨落的影响。 - A hierarchical background model based on kernel density estimation was proposed and a gauss function numerical table was previously created. In the detection step, the probability of the pixel was obtained by look-up table and Gaussian pyramid was built to remove false foreground.
建立了核密度估计分层背景模型和高斯函数数值表，利用高斯图像金字塔的高层淘汰虚假前景。