查询词典 polynomial distribution

A 2D PIC model was used to simulate the PIII process for a planar target. The simulation results in one whole pulse show that the sheath expands with a decreasing speed and the sheath shape would change form elliptically cylindrical to circularly cylindrical. The dose distribution of ion implantation in the target surface is not uniform, and the concentration depth profiles of retained dose are considerably different, in different positions of the target.

本论文采用二维粒子模拟方法对等离子体离子浸没注入技术进行了模拟研究，在一个完整脉冲时段内，等离子体离子浸没注入平板靶的模拟过程表明：等离子体鞘层的扩展先快后慢，鞘层形状由椭圆柱形向圆柱形演化；注入离子剂量在靶表面的分布是非均匀的；在靶的不同位置注入的离子在改性层中的浓度深度分布有显著差别。

In the theory part, based on the rate-equation theory of four-level system, the expressions of output power and slope efficiency under the conditions of near-threshold and deeply pumping have been given. The effects of space distribution variables(the position of focusing point, dimension of pumping light and laser light and ellipticity)on the output characteristics were also discussed.

在理论部分，首先从四能级系统的理论出发，得到了近阈值条件和强泵浦条件下的输出功率和斜效率的表达式，并详细讨论了泵光聚焦位置，泵浦光和振荡光的光斑大小、椭圆度等空间变量对输出特性的影响。

In this thesis, the mathematics model was used to simulatc the alage growth in Lake Taihu; An enzyme-linked immunosorbent assay was used to monitor the spatial and temporal distribution in 2001; The microcystis spp was culturede with scendesmus obliqaus to study the toxin secrete mechanism of the MC from the population competition; The degradation of the MC by the sediment collected from Lake Taihu and one of the submerged mcrophyte Elodea nuttalli were discussed.

本文采用数学模型的方法模拟了太湖藻类的生长情况；应用酶联免疫吸附法监测了2001年MC的时空分布情况；在实验室内进行藻类培养，从种群竞争的角度初步探讨了MC的产毒机理以及太湖底泥和沉水植物对MC的自然降解作用等。

They concentrate on discussing the dynamic character of the first and second moment of time series. Under normal distribution, the problem of dynamic financial risk measure and elusion can be solved effectively. However, it becomes invalid or is short of effectiveness.

他们的工作主要集中于讨论时间序列的一阶矩和二阶矩的动态性质，能够有效地解决正态分布条件下动态金融风险的测度与规避问题，对于非正态分布条件下相关主题的讨论具有一定的局限性。

This indicated that the distribution of elements in soil and the soil water of the same feature as a whole, because of long-term eluviation.

即洼地土壤和土壤水的Ca、Mg含量较坡地低，而K、Na、Fe、Zn、Mn、Cu、B等含量较坡地高，这是地貌条件控制下元素迁移的结果。

Gokan N 1966 on the tracheation and distribution of the air sacs in elytra of scarabaeid beetles Memoirs of the Tokyo University of Agriculture , 1966,null

増田由美子%岡田明%田畑洋%米田孝治%山本吉信カタゾウムシの翅構造と力学特性 null ， 1995，陈锦祥%倪庆清%徐英莲甲虫前翅结构中的优化设计复合材料学报， 2004，5

Grain size trends show sediment transport towards the central sandbank within the embayment and the seaward end of the deep channel at the entrance. Such patterns are highly consistent with the characteristics of current velocities and geomorphology; they are also in good agreement with heavy mineral movement and spatial distribution patterns of calcareous nannofossils.

沉积物粒径趋势结果显示，胶州湾内的大型垄脊和口门延伸至外海的深槽尾部是两个主要的沉积物汇聚区，这不仅与地貌及水动力相吻合，还与根据重矿物扩散趋势一致；与颗石藻化石空间分布型式亦有一定的相关性。

Command control ; embedded system ; robustness ; subspace distribution ; confidence measure

命令词语音识别；嵌入式；鲁棒性；子空间分布；置信度

Corresponding chaotic evolution operators and chaotic population embedding operator are designed, and the species conservation strategy based on chaotic basin of attraction is proposed to treat with asymmetric distribution of extremum and to find all or near all minima.

设计了相应的混沌进化算子以及混沌群体嵌入算子，提出了基于混沌吸引域概念的种群保护策略，适应了极值点分布不均匀的情况，达到求解全部／大部分极小点的目的。

The probability distribution of the detection output is discussed in two kinds of embedding model.

本文分析了两种嵌入模型下检测器的理论输出分布。

Finally it offers the analysis of the fault-tolerance system as well as its test verification.

这样，运行于空间环境中的系统的设计目标就是在保证系统实时性

However, it is still difficult to find out the real reason of the increase of the keratinized gingiva during the orthodontic extrusion whether it is due to the proliferation of the gingival tissue or to its elastic nature, that is because the proliferation of the fibroblasts as well as the connective tissue changes in volume and the intra-fibers spaces were all immeasurable in most of the studies.

然而，仍然难以找到真正的原因增加的角化牙龈在正畸挤压它是否是由于扩散的牙龈组织或其弹性性质，这是因为增殖的成纤维细胞以及作为结缔组织的变化量和内部纤维空格都是不可估量的，大多数的研究。