查询词典 probability density function

The summary of the adopted models contains a two-scale k-ε turbulence model,the scalar joint probability density functiontransport equation approach,the augmented reduced mechanismfor methane oxidation (consisting of 16 species and 12 lumped reaction steps),the Euclidean minimum spanning treesmall scale mixing model etc.

所采用的数学物理模型包括双尺度的k-ε湍流模型，标量联合的概率密度函数输运方程方法，甲烷氧化的ARM简化化学反应机理(包含16种组分，12步总包反应)和欧几里德最小生成树小尺度混合模型。

Since Azzalini (1985,1986) introduced the fundamental properties of the skew-normal distribution, there are many investigations about the skew distributions based on certain symmetric probability density functions.

自从Azzalini(1985，1986)提出关於偏斜常态分布的一些基本的性质开始，就有钗h基於某些常见对称分布的偏斜分布之研究出现。

These results can be turned into terms of spectral density and Weibull probability distribution. All the analysis results can be used in design and analysis of deepwater mooring system.

在对各种时历结果进行处理后，可得到各种结果的谱密度和Weibull概率分布，为深海系泊系统的设计和分析提供参考。

It should be noted that the laser energy density at this peak is different from zero probability LIDT achieved by ISO11254-2 measurements.

零几率损伤阈值是损伤从无到有的转变点，而弱损伤几率峰值所对应的激光能量密度是损伤由弱到强的转变点。

Objective To explore the relation between probability of dengue episode and aedes density and clim ate factor.

目的 探索登革热发病与伊蚊种群动态变化和气候因素的关系。

It is hard for naval gun weapon system to forecast or track high speed and mobile aerial target. Aiming at this problem, a Barrage Firing Curtain firing method was presented. By increasing hitting points, the disperson density of pills and curtaining area are extended, and higher hit probability can be obtained.

针对舰炮不易预测和跟踪高度机动目标的问题，提出了一种拦阻射击方法，通过增加命中点个数来提高弹丸散布密度、扩大拦阻面积，获得较高的命中概率。

The wave is the core problem of low Fr. current .In order to make diffluent piers with low ridge to be popularized and applied, the surface wave of low Fr. current is chosen as the research object .We measure the surface wave elements and the velocity distribution of various diffluent piers scheme by the experiment of physical model. We also analyze the average wave height, the the average value of the square of wave , unit width of the waves energy , the probability density distribution of wave height ,and the power chart character, so as to reveal the weakening wave mechanism of the diffluent piers .

低Fr水流的核心是波浪问题，为了低坎分流墩的推广应用，本研究以低Fr水流的表面波浪作为研究对象，通过物理模型试验，对各种分流墩方案消能工的下游水面波浪要素、流速分布进行测试，分析低坎分流墩下游波浪的平均波高、均方根、单宽波能、波高概率密度分布及功率谱特性变化规律，从而揭示了低坎分流墩的削波机理。

Statistic analysis indicated that three kinds of irregular components show complicated random characteristics, and their probability density distributions change with increasing gas velocity, that is, irregular occurrence time fluctuations of all three kinds of elements of heterogeneous structure (the dilute phase, the dense phase and the dilute/dense cycle elements) evolve similarly from symmetric distribution similar to Gauss distribution at low gas velocities to double-peak distribution at medium gas velocities, and become dissymmetric single-peak distribution at high gas velocities.

相关分析表明：动态行为中的三类非规则波动呈随机性；直方图分析表明：随表观气速变化，非均匀结构的各种非规则波动的概率密度分布均具有复杂的演变；其中，对于时间非规则波动，其演变趋势是：小气速下的单峰分布、中气速下的双峰分布和高气速下的非对称单峰分布。

The rolling compaction, vibrating compaction, or gyratory compaction specimens have the good statistical properties, the big sample analysis indicated that the distribution is accord with Γ probability density distribution.

轮碾压实、振动压实和旋转压实成型试件的集料颗粒主轴方向具有较好的统计特性，大样本分析显示，基本符合伽马概率密度分布。

Firstly, by analyzing existing models of predicting concrete carbonation and its influencing factors, a practical model of predicting the depth of carbonated concrete is proposed in this thesis, which takes the compressive strength of concrete as the main parameter and considers influence of temperature and moisture of environment, construction factors, stress condition and density of CO2 in the environment, and plenty of spot-data has been used to verify the model; By means of regression analysis of the spot-data, the calculating model of uncarbonated remainder is formulated; Considering the randomness of concrete carbonation, the paper put forward a probability analysis method of concrete carbonation span-life.

首先，论文在分析已有混凝土碳化预测模型与影响因素的基础上，建立了以混凝土抗压强度为参数，考虑环境温湿度，施工因素，应力状态及环境CO_2浓度影响的混凝土碳化深度实用模型，并利用大量工程实测数据对模型进行了验证；通过对实际工程检测数据的回归分析，给出了碳化残量的计算公式；考虑到混凝土碳化的随机性，提出了混凝土碳化寿命的概率分析方法。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。