It's particularly fit for base materials with high density and somewhat absorbency. 特别适用于材质致密度较高且有吸收性的基材。
The density of holes in the base is less than the density of free electrons in the emitter and collector. 基极中空穴的密度小于发射极和集电极中自由电子的密度。
Base on the current density caused by the moving monopole, the hyperbola radiation spectrums of monopole in the central force-field are studied in detail and numerical value calculated in this paper. 从运动磁单极子产生的流密度方程出发,研究了在中心力场中沿双曲线运动磁单极子辐射能量谱,并对其进行数值计算。
The Best Base Material Water Content and Maximum Dry Density Determination 基层材料最佳含水量和最大干密度的确定方法探讨
First, the geometry of PNA molecule in gas phase is optimized on the base of density functional theory. 首先在密度泛函理论基础上优化了汽相下pNA分子体系的几何结构。
Firstly, the effective charge of characteristic atom was evaluated through the approach on the base of density function theory ( DVM-X_ α) according to the central atom cluster model. 其过程为:首先采用中心原子团簇模型,用密度泛函理论的离散变分方法确定特征原子的有效电荷;
As a result, experimental research has been made on the variations of the pharmaceutical ions transmission quantity on the base of the variations of the density of organism ions by author, it provides an experimental basis for the pharmaceutical treatment of clinical DC electric ions penetrating therapy. 为此,我们对由于机体离子浓度改变而引起药物离子导入量的变化进行了实验研究,为临床利用直流电离子透入疗法进行药物治疗提供依据。
The experiment proved that proceeding two-photon three-dimensional optical data storage with DVD pickup head was feasible, which indicated that two-photon photobleaching technology combined with the current CD/ DVD and provided a base for realization of high density and super high density optical data storage. 实验证明了用DVD光头进行双光子三维光数据存储的可行性,表明双光子吸收光致漂白技术可以与现有CD/DVD兼容,为实现多层高密度和超高密度光信息存储打下基础。
Its output, quality and growth are affected by base manure, density, temperature, light and moisture. 荞麦菜的产量、品质及生长受栽培基质、密度、温度、光照和水分等因素的影响。
Wood base density ( BD) and bark proportion showed close negative correlations relationship. 木材基本密度和树皮率间存在紧密的负相关关系。
The effect of lead-time reduction on profits of supply chain actors is studied, the Pareto improvement of supply chain channel coordination is discussed base on the assumption that probability density function of the market demand is uniform distribution and the forecast bias varies along with lead time. 在需求函数为均匀分布且预测偏差随提前期变化的条件下,分析了提前期压缩对供应链成员收益的影响,以及如何实现供应链成员收益的Pareto改进。
Dongting Lake area is an important national commercial agricultural base with high population density. 洞庭湖区人口和城镇密集,又是全国重要的商品农业基地,退田还湖和平垸行洪的人口压力很大,移民安置任务艰巨。
Regarding the three important factors influencing self-thinning of Cunninghamia lanceolata plantation as control variables, the authors have built the density control model of Cunninghamia lanceolata plantation which can provide reference base for density management and density control of Cunninghamia lanceolata plantation. 以影响杉木人工林自疏过程密度变化的三个重要因子为控制变量建立了杉木人工林密度控制模型,为杉木人工林密度管理和密度控制提供了参考依据。
Here, we study the propagation of ultrashort laser pulse in PNA molecule medium, especially the effects of permanent dipoles. Firstly, its geometry in gas phase is optimized on the base of density functional theory with a 6-31++ G basis set. 本文以PNA分子作为对象,研究了超短脉冲激光在该分子材料中的传播过程,并着重讨论了分子固有偶极矩对该动力学过程的影响。
Secondly, different hardness of bit base, diamond particle size and density are chosen for different strata or rocks; 二是根据不同地层及岩性选用不同胎体硬度金刚石钻头、不同的金刚石粒度与浓度;
The influence of the base gap, the charge density and the impurity from the filling, the temperature, the maintenance and the reserve mode in use on the shoot safety are also studied. Cultivating mode for the Chinese sports reserve forces 杀爆弹装药过程中装药底隙、装药密度和杂质及使用过程中温度、勤务、贮存对安全失效的影响;体教结合培养体育后备人才模式研究
The ND-A nuclear earth base densimeter is a precise instrument which can be used to measure the earth base wet density rapidly and non-destructively with measuring errors within ± 1%. 本文介绍研制的ND-A型核子土基密度计。这是一种用来测量土基湿密度的快速、非破坏性、精确的测量仪器,测量误差为±1%。
The volume of the output filter can be reduced greatly used in cascade inverter with carrier-phase-shifted SPWM technology which has a high equivalent switching frequency and a good output sine wave. It is the base of the high power density of ASI. 载波移相正弦脉宽调制技术有独特的消谐波优势,其等效开关频率高,输出波形正弦度好,可以大幅减小滤波器体积,为实现系统的高功率密度奠定基础。
The Base Smoke Density of Smoke Fire Detector Created by the Suspended Particulate PM_ ( 10) in Atmosphere 大气悬浮颗粒PM(10)对感烟火灾探测器本底效应研究
In this paper, the polynomial expansion of continuous distribution density function is discussed on the base of the relationship between density function and moments. It is mainly dealed with the accuracy of finite item expansion of Gram-Charlier series. 本文利用密度函数与矩的内在联系,探讨了连续分布密度函数的多项式展开,着重对Gram&Charlier级数有限项展开式的精度进行了分析;
The development of a knowledge base system about high density tungsten design 高密度钨合金材料设计知识库系统的开发
In this article we determined the optimal condition, i.e.washing time temperature and the base's density, about the base washing by using the method of the factor analysis and quadrate experiment. 利用单因素分析法和正交实验法确定了碱洗的最佳条件,包括碱洗时间、碱洗温度和碱洗浓度等。
Results Wider splitting was exhibited at the fissure region than that of the nasal base and oromaxillaries, while the density of tissues at each level was decreased. 结果裂隙中央面积扩大大于鼻底和口腭部,各层灰度梯度在扩弓后都有所降低。
The Calculation Analysis of the Influence of the Ignition Function of Base Bleed Unit on Range and Density of Base Bleed Projectile 底排装置点火性能对底排弹射程及密集度影响的计算分析
With the amount of nitrogen increased gradually complete chloroplast and mitochondrial structure, the base layer of varying particle density and regular arrangement along the long axis of the chloroplast. Chlorophyll content increased, the gradual extension of the function of leaves. 随着施氮量的增加,叶绿体和线粒体结构逐渐完整,基粒片层变密且沿叶绿体长轴方向规律排列;叶绿素含量逐渐增加,叶片的功能期逐渐延长。
It estimates the base sampling density according to the resolution and terrain of the input signal to avoid missing signal. 根据输入数字信号的分辨率、地形起伏等预估基础采样密度,避免出现信号遗漏。
In the "hot spot" areas of network deployment, the base stations are distributed in high density. 在网络部署的热点地区,基站呈高密度状态。
On the base of the hypothesis of the density continuum, the improved starting weave model and the parking weave model are established. The calculation expressions of the queue length and the scatter time at intersection are provided. 对交通流密度进行连续性假设,建立了基于车辆运动学的改进起动波和停车波模型,给出信号交叉口排队长度和消散时间的计算公式。
The optimization of the thickening process of an iron ore tailings was studied by the two-stage classified thickening process consisting of "hydrocyclone-thickener", which established the base for the preparation of high density tailings. 本文采用旋流器-浓密机两段分级浓缩工艺对某铁矿尾矿进行了浓缩工艺优化研究,为高浓度尾矿的制备奠定了基础。
On the base of the high density ECR plasma source, we design multi-holes and single-hole ion sources and preliminary measure the ion flux. 在ECR高密度等离子体源的基础上设计加工了多孔和单孔离子源,对离子源的离子通量作了初步的估算。