查询词典 sampling distribution

Then, we present an efficient sampling algorithm on the unit sphere, and the generated point distribution can match the SRBF representation. We are capable of creating images with multiple measured BRDFs under global illumination.

此外，根据球面射基底函的表现形式，我们也提出一种有效的重要性采样方法，其产生出的采样分布可以合球面射基底函所描述的资分布，此方法可以在全域光源照射的环境下，有效地绘制包含多种复杂材质的场景影像。

The distribution and foundation mechanism was studied when sampling Youyongchi and Dongyu Avicennia marina populations.

对分布在厦门白城游泳池一个刚建立的白骨壤种群和厦门西海域东屿的白骨壤种群进行了遗传变异和分化的研究，探讨了种群的分布及建立机制。

Dendroctonus armandi ; distribution ; sampling model ; Pinus arma ndi

华山松大小蠹；分布；抽样模型；华山松

The population density, distribution, and sampling model of a bark beetle,Dendroctonus armanˉ di , on Huashan conifer,Pinus armandi , were investigated in a for est stand located in Liuba County, Shaanxi Province, China.

在陕西省留坝县的华山松林区，对华山松大小蠹（Dend roctonus armanˉ di）种群密度、分布状态和抽样模型进行了研究。

In our studies,sludges composting was used as object, fluoranthene was on behalf of PAHs,and methods included dynamic sampling,room analysis,sludges' composting,leaching of soil column,and room culture were employed. The main contents include:the concentration and the distribution of PAHs in municipal sludges in Jiangsu Province,effects of composting on the concentration of PAHs in municipal sludges,the physicochemical properties of water dissolved organic matters in sludges before and after composting,effects of sludges composting and DOM on the desorption-leaching and eco-toxicity of FLT in polluted soil,and primary investigation of mechanism on same phenomena.

本论文以污泥堆肥为原料，以荧蒽(fluoranthene，FLT)为PAH的代表，采用动态取样、室内分析、污泥堆肥、土柱淋滤和室内培养等方法，系统研究了江苏城市污泥中PAHs的含量以及分布模式；堆肥对污泥中PAHs含量的影响；污泥堆肥前后水溶性有机物的理化性质特征变化；污泥堆肥对污染土壤中FLT解吸-淋滤、以及生态毒性的影响，并对有关现象进行了机理探讨。

On the sampling scale of 20 m, the road effects on different dominant populations were demonstrated in their spatial distribution patterns. There were significant increases in the biomass of Schima superba population, the number of individuals and biomass of Litsea rotundifolia population (P.05) along the parallel direction to road, respectively, while those of other populations had no significant difference.

优势物种20 m取样尺度的空间分布格局反映了不同种群对旅游路径干扰的不同响应，其中荷木的生物量、豺皮樟的个体数和生物量在远离旅游路径方向上均呈显著增长趋势，其他物种的个体数和生物量变化不显著。

Multi-channel linear-phase nonuniform filter banks with proper sampling factors are designed which are applied to rows and columns of the input image, respectively, according to its power spectrum distribution. By this procedure, the image can be segmented nonuniformly in the frequency domain.

根据输入图像的频谱能量分布和实际应用的需要，设计具有合适采样因子的线性相位非均匀滤波器组并将其应用于对图像行、列的处理中，实现对整个图像按照频谱能量的高低进行灵活分割的过程。

The concept of entropy is applied to define an index on evaluating the abnormal condition. Prediagnosis of machine fault is made using the spectral structure distribution divergence as a criterion, in which the J divergence concept and multi-parameter evalution theory that describe the pseudo distances between the sampling signals and the corresponding standard faulty signals are used.

为此，基于信息熵提出了一个机组起停车过程转子运行状态的评估指标，并在此基础上，为实现机组运行故障早期预诊的目的，进而基于J散度及多参数评估理论，提出了信号频谱结构分布散度的概念，以描述实测信号与机组典型故障信号间的伪空间距离，从而实现了机组运行故障的初步预诊。

Three sampling sites were set along the river,the classification and distribution characteristic of the phytoplankton,zooplankton and zoobenthos were sampled and investigated in Mar,2005,respectively.

本文于2005年3月针对武江乐昌河段布设了三个监测断面，分别取样调查了浮游植物、浮游动物、底栖动物的种类和分布特性。

Nationwide sampling program is designed according to the resources distribution and coal-forming periods as well as coal rank and yield of coal in China, 305 coal samples were collected and determined by catalytic spectrophotometry combined with pyrohydrolysis.The geochemical mechanism of the concentration or depletion of iodine was discussed during the process of coalification,which including peat diagenesis and coal metamorphism.The contents of iodine in Chinese coals fall in the range of 0.04-39.51 mg/kg.

根据中国煤炭资源分布和成煤时代，兼顾煤的变质程度和煤炭产量分布，在全国范围内采集了305个煤样，采用高温热水解—催化分光光度法分析了煤中碘的含量，探讨了煤化作用(包括泥炭成岩作用和煤变质作用)过程中煤中碘富集或亏损的地球化学机制。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。