查询词典 distribution curve

But he found eight-year-olds as tall as 13-year-olds, and boys of ten who weighed twice as much as others the same age. This distribution was viewed by the 19th-century Belgian mathematician Adolphe Quetelet as God's "curve of error", as if the tall and the short were deviations from a correctly proportioned "homme moyen", or average man.

但他的调查也显示：一些8岁儿童同13岁的一样高，一些10岁儿童比同龄重一倍。19世纪的比利时数学家Adolephe Quelet将此情况视为上帝的"错误曲线"——过高和过矮好比是对正常身高的偏离。

Through conducting research on the classification of high density drilling fluid, the optimal grain distribution of adulterant is determined using the density-grain-viscosity curve.

对高密度钻井液进行了分类，以密度－粒度－黏度曲线确定了最优化加重剂粒度分布，通过优化基浆配制工艺、优选强抑制钻井液体系、优化加重剂与钻井液的粒度分布研究，应用超微细、亚微态粒子稳定技术，强化固相控制，形成一套优化的高密度阳离子钻井液技术工艺。

Based on the laminate theory, a laminate weakened by damage is treated as an anisotropic thin plate. Using the complex potential method in the plane theory of elasticity of an anisotropic body, the series solution of finite anisotropic thin plate containing an elliptical inclusion is proposed with the help of Faber series. A hybrid element with an elliptical inclusion for anisotropic materials is obtained by using the hybrid variable principle, and the element efficiency is verified by numerical examples. The state of the damage is modeled by an elliptical soft inclusion, and using the point stress criterion based on characteristic curve and Yamada-Sun etc. criteria, the prediction of the strength of a composite laminate with damage is set up. The effects of various parameters on the stress distribution and the residual strength of a composite laminate weakened by damage are detailedly studied.

首先基于经典层板理论，将复合材料层板的弹性问题化归为均匀各向异性板来求解；采用各向异性体平面弹性理论中的复势方法，以Faber级数为工具，给出了有限大含椭圆核各向异性板弹性问题的级数解形式；利用杂交变分原理，成功导出含椭圆核各向异性板杂交应力有限元，并用算例验证了该单元的可行性和有效性；采用含刚度折减椭圆形弹性核的冲击损伤模型，引入基于特征曲线和Yamada-Sun破坏准则的点应力判据，建立了含损伤复合材料层板剩余强度的分析方法；通过数值计算详细讨论了各种几何参数对损伤层板应力分布、剩余强度的影响，得到了一系列对工程应用具有实用价值的结论。

Normal distribution is the most important distribution in the probability theory, the discovery of normal probability curve has revealed the evolution of De Moivre's probability thought.

正态分布是概率论中最重要的分布，其发现揭示了棣莫弗概率思想的发展过程及其对概率论发展所做的奠基性工作。

Based on the data and materials collected from many years investigation over the sample plots in Daemonorops margaritae plantation in Daqingshan, Guangxi Province, this paper established a model for its stem length distribution by choosing three growth equations and using a method of twice curve fitting to describe the rule of length distribution for mother stem and sucker stem.

对广西大青山黄藤人工林固定样地进行调查和收集资料，选择Logistic、Weibull和Richards 3种理论生长方程，采用两次曲线拟合法分别描述母茎长和萌茎长结构规律，旨在建立黄藤人工林茎长分布模型。

The result shows that visitor distribution of World Expo shows kind of internal unbalance featured by staged continuous increase, a saw curve, uncertainness, and a difference between working days and weekends, etc.. the result also indicates that the quality and attractiveness of a World Expo is the determinant of both the amount and distribution of visitors, and that there is an overlap effect of external factors forming peak or valley day of visitors.

研究表明：世博会参观者分布有其内在不均衡性，如阶段性持续递增、锯齿性曲线、不确定性、工作日和节假日分布差异等；世博会办展质量和吸引力是影响参观者人数和分布的最主要因素；影响参观者人数的外生变量，具有叠加和共振效应，因而形成参观者高峰日或低谷日。

In conventional indirected parameter estimate, such as Weighted Least Square Method, the changing activity of the injected radiotracer is conventionally measured through multiple consecutive PET image reconstructions. The image of the radioactivity distribution in each frame is reconstructed independently and the whole set of frames is then used to estimate the distribution of the physiological parameter of interest by the application of an appropriate pharmacokinetic model to the time radioactivity curve either of appropriately selected functional regions or of each image element.

传统的间接参数估计方法如加权最小二乘参数估计方法(Weighted Least SquareMethod，WLS)，需要首先从测量数据重建出PET动态放射性活度图像，然后在这些时间上连续的重建图像应用适当的动力学模型上估计感兴趣的生理参数，然而PET重建图像中往往含有极大的噪声，这些噪声将影响参数估计的准确性。

At first,the curve of charge distribution,ionizable state of nonisothermatity sphere,Was obtained by computer to calculate ionized state according to distribution data of temperature and dinsity within Earth. Secondly,the pussibility of microgravitational testonosphere,Within the isothermality sphere,was found by balance between pressure and volumetric forcein Earth's interior.The thickness is 1 000 km or so.Finally,the result come into commom use various geophysical process withi...

首先依据地球内部温度和密度不均匀分布数据，用计算机计算它的电离状态，得到非等温分层电离状态的电荷分布曲线；其次从地球内部存在的流体压力与两类体积力：重力和静电力的平衡方程讨论中，发现在某一等温层内可能存在微重力构造圈，其厚度约为1000km左右；最后在地学研究向整体化和深部化发展趋势下，预期这个结果将有助于理解地球深部发生的各种物理过程且与地震S波在核－幔之间层中消失观测事实相一致。

The independent Agents are adopted to complete the specific tasks from sensing temperature of axles to display curve of axle's temperature and to actions of effectors, so the knowledge distribution and control distribution is implemented in this system. It improves the real-time ability, reliability, maintenance and extendibility. It also realizes the intelligence of temperature's sense and control though the communication, coordination and cooperation among Agents.

该设计采用独立Agent完成了从轴温数据的采集、处理到执行机构产生控制动作再到人机界面的实时显示等一系列任务，实现了轴温监控的知识分布和控制分布，提高了系统的实时性、可靠性、可维护性和可扩展能力，并且通过多Agent间的相互通信、协调与合作实现了轴温监测和控制的智能化。

Through analyzing the heavy mineral combination and its distribution characters in Malang Area of Santanghu Basin, the source direction of deposits were judged in Malang Area by using the type of the mineral combination, its percentage content and curve of stability coefficient, in combination with the percentage distribution of quarts sandstones in each stratum.

通过对三塘湖盆地马朗地区重矿物组合及分布特征的分析，利用重矿物组合类型、百分含量及重矿物稳定系数的曲线特征，结合各层系的石英砂岩百分含量分布，判断了马朗地区的沉积物源方向。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。