查询词典 methods of sampling

Through the use of statistical methods of descriptive statistics, independent t-value test sampling, single factor variation analysis, Pilson differentiation correlation and gradual multi-regression, concrete conclusions are as the following

经由描述性统计、独立样本t检定、单因子变异数分析、皮尔森积差相关、逐步多元回归等统计方法加以分析后所获致之具体结论有

Based on the summarizing of the exiting algorithms of the texture mapping and antialiasing, this paper goes deeply into the basic theory and processing of texture mapping. The texture compress algorithm which can satisfy the need of the memory and time is given for the stochastic sampling in the inverse texture mapping; the geometry transformation in the texture mapping are discussed and the concepts of the unitary parametrization and the patch parametrization is proposed, some kinds of the unitary parametrization methods of parametric surfaces and the geometry transformation in the patch parametrization are also presented; in order to solve the aliasing in the parametrization of intermediate surface-sphere in two-part texture mapping, an area-preserving transformation is presented also; to improve the quality of the graph the aliasing in the texture mapping is analyzed from the aspect of signal process, and the modified summed-area tables algorithms is proposed; the distortion of the scanline conversion algorithms under perspective transformation is analyzed and the proper interpolation algorithm is presented so the aliasing problem of the polyhedral object after the unitary parametrization is efficiently solved.

本文在总结现有的纹理映射和反走样算法的基础上，深入研究了纹理映射的基本原理与过程，根据反向纹理映射对纹理随机采样的特殊要求，提出了一种可满足存储空间和寻址时间的纹理压缩存储算法；通过对纹理映射中几何变换理论的进一步深入探讨，提出了整体参数化和面片参数化的概念，并给出了参数化曲面的各种整体参数化方法和面片参数化的几何变换形式；针对现有的两步映射算法所存在的中间曲面—球面的参数化问题，提出一种等积映射方法，较好地实现了由非参数化面片拼接而成的多面体表面的纹理映射；从信号采样的角度深入分析了纹理映射中走样产生的原因，提出了改进的区域求和表算法，使图形生成的效果有所提高；还分析了一般的扫描线算法在透视变换中所存在的问题，提出了一种正确的插值算法，从而解决了整体参数化后多面体表面纹理映射的几何变形问题。

Adopting peak detection, AGC based on receiving duty cycle and multi-phase synchronization, the method can be an optional scheme for lowering sampling rate and system realization cost.engineering methods of IR-UWB wireless systems which focus on the RF front-end of the transceiver are studied by theoretical analysis and experimental verification.

文中还给出了综合这些方法时在室内多径信号下接收性能的仿真结果，仿真表明这种方法在室内环境下可以可靠工作在数兆到数十兆的传输速率上。

Methods: A recently deeloped method of sampling perilymph from the cochlear apex of guinea pigs was used in which the samples represent fluid originating from different regions along the scala tympani.

一种最近发展的从豚鼠耳蜗顶部进行外淋巴液采样的方法被应用于该项研究，采取这种方法可以获得代表沿着鼓阶不同区域产生的液体的样本。

Within methods of this class, tracking is solved by sequential building posterior probability distribution of target state, and sampling based Monte Carlo computing acts as one of the key technologies.

这类方法通过序贯构造目标状态的后验概率分布来求解跟踪问题，而基于抽样的蒙特卡罗计算方法则是其中关键的统计计算技术。

After analyzing and comparing two kinds of current control methods of three-phase VSR: indirect current control and direct current control, the author employs the latter as main control scheme, which is to control the phase and amplitude of ac-side current directly, by using dual closed-loop control scheme, through sampling currents of phase a and b and converting them by 3s/2r to get active component and reactive component of ac-side current.

分析比较了三相电压型PWM整流器的两种电流控制方法：间接电流控制和直接电流控制。

In order to know Beijing urban residents' consciousness of tax-paying, recognition and sense of individual income tax and the understanding for the burden condition of individual income tax, this paper, on the basis of adopting sampling questionaire investigation method of meeting by chance, takes the methods of descriptive statistics, correlation analysis, etc. to analyze the condition of Beijing urban residents' individual income tax, and points out that the propaganda of the tax system is not good enough...

为了解北京市居民的纳税意识、对个人所得税的认识和感觉以及对个人所得税负担状况的理解，在采用偶遇抽样问卷调查方法的基础上，使用描述统计、相关分析等方法对北京市居民个人所得税状况进行了分析，针对我国个人所得税制的宣传力度不够，多数人不了解个人所得税的计算，以及统计口径不适合目前分析需要的现状，提出统计口径宏观测算方法和统计调查的改进意见，以期对北京市的税收建设有所帮助。

Several representative regions including humid subalpine area, arid valley and the adjacent recovery area and the plateau region of Minjiang riverhead were selected to study the soil nutrient and biodiversity change. Based on field vegetation investigation, soil sampling and analyses, Ecological effects of land use/cover in these regions were discussed. Also in corporation with the social and economic data, the recovery methods of different degraded region were put forward.

研究选取亚高山湿润区域，半干旱河谷区及其恢复区，岷江源头高原面区域作为重点，通过大量的野外植被调查，土壤采样分析，多元统计方法等研究典型区土地利用／覆被变化的生态效应；并根据社会经济资料和调查数据和土地覆被-土壤相互作用规律，提出了岷江上游生态恢复对策。

Proper design of sampling and survey methods can increase substantially the accuracy and usefulness of assessment data.

设计适当的抽样和调查方法，可以充分的提高评估数据的准确性，实用性。

With the methods of systematic and random sampling, the 39 grasshopper species and more than 3000 specimens had been collected in 5 kinds of habitats, belonging to 5 families, 26 genera.

采用系统取样和随机取样相结合的方法调查了5种生境中蝗虫的种类和数量，共采集到蝗虫39种，标本3000余号，隶属于5科26属。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。