查询词典 empirical distribution function

Because of its easily calculating and its accurately description parametric method has became mainstream in study field, polynomial hazard function distribution model was a large class of parametric models, when the dates are not readily handled by one of the common models such as exponential distribution or Weibull distribution, polynomial hazard function model always be used to provide adequate fits of the dates.

随着该学科的发展，大量参数、非参数方法相继提出，特别是生存分析的参数方法，以其处理简便、描述准确成为生存分析研究的主流方向。多项式危险函数模型是参数模型中的一大类，当一批数据不能用熟知的一些分布，诸如Weibull分布、对数正态分布进行很好的描述时，常常使用多项式危险函数模型。

Based on the dynamic equation, the transport and acceleration of out-flowing ionospheric ions in the magnetosphere are studied by means of finding the ion distribution function. They include two parts: the study of static ion distribution with analysis and numerical compute; the study of ion acceleration by induced electric feild in the period of dipolarization of taillike geomagnetic lines in the substorm expansion phase with the numerical simulation of the ion distribution function.

本文在磁层中上行离子的加速与传输理论研究领域中，采用动力论方程，用求解离子分布函数的方法来研究问题：(1)用解析求解和数值计算的方法，对上行离子在不同Kp指数条件下磁场位形中的定态分布进行了研究；(2)用数值模拟计算分布函数的方法，对上行离子在亚暴膨胀相磁场向偶极形驰豫过程中受磁尾的感应电场加速进行了研究。

For the question of distribution and acceleration of ionospheric ions O+,H+ and He+ in the magnetosphere, the ions static distribution function is found by solving the dynamic equation, and the up-flowing ion static distributions with various Kp indexes are investigated. The ions distribution function during the geo-magnetic dipolarization is simulated, and the upflowing ion acceleration in the magnetotail is investigated.

针对磁层中电离层离子O+、H+和He+分布与加速问题，采用动力论方程求解了离子定态分布函数，研究了不同Kp指数条件下上行离子的定态分布；模拟了磁场偶极化过程中离子分布函数随时间的变化，研究了上行离子在磁尾的加速。

The membership function can exactly express the fuzzy satisfaction set by considering the vagueness of satisfaction degree of objectives and introducing the membership function for the fuzzy satisfaction sets of system reliability and system cost. The normal distribution and Cauchy distribution of this membership function is modified according to the fuzzy satisfaction sets. By doing this, the multi-objective optimization problem can be converted to a single-objective optimization problem to be solved.

模型充分考虑到目标满意度的模糊性，通过引入系统可靠度与费用的模糊满意集的隶属函数，并根据它们的模糊满意集对其正态分布、柯西分布进行适当修改，使之能够准确表达通常情况下的这两个目标的模糊满意集，最终，把两目标优化问题转化为常规单目标优化问题求解。

All of which are of empirical origin, yet in the construction of a system of pure morality these empirical concepts must necessarily be brought into the concept of duty, as representing either a hindrance, which we have to overcome, or an allurement, which must not be made into a motive.

因此，虽然道德性的至上原理及其基本概念是先天知识，但它们却不属于先验哲学，因为它们虽不以快乐和不快、欲望和偏好等等都具有经验性起源的概念为其规定的基础，但在义务的概念中毕竟必须把它们或者作为应当克服的障碍、或者作为不可当做动因的诱惑而一起纳入道德性体系的制订。

In this paper we establish an equilibrium model of intra-product specialization dominated by MNCs, and perform some empirical tests of China's trade volume growth using variables including technological conditions of trade, extent of similarity of economies, policy conditions of trade, extent of disintegration of production and level of per capita capital equipment; the empirical results support our basic conclusions.

构建跨国公司主导的产品内分工均衡模型，利用贸易的技术条件、经济体的相似程度、贸易的政策条件、生产非一体化程度和人均资本装配水平等变量对中国贸易量增长进行计量检验，其结果支持上述基本判断。

We introduce the basic concepts needed to analyze the estimation error in VC theory by showing the connection between Empirical Risk Minimization consistency and uniform convergence and illustrate necessary and sufficient conditions for the consistency of the ERM principle, that is for the convergence of the minimum of the empirical risk to the minimum of the expected risk.

为了整合最小化经验风险和最小化期望风险理论，我们将藉由最小化经验风险(Empirical Risk Minimization， ERM)及统一收敛性举例说明原理的必要与充份条件，以分析VC计算理论的误差估算所需的基本概念。

Obviously, explaining the differences between theories and empirical results, strengthening the convincingness of empirical researches and revising existent theories are our main direction when we go on the study of post-merger performance.

显然，对理论与实证差异进行解释，增强实证研究的说服力和修正现有理论是公司并购绩效研究继续发展的方向。

On this basis, the corrected and empirical formula is proposed and empirical coefficients are provided.

在此基础上，提出了针对特定油品污染土壤含水率测定的校正公式并给出了经验系数。

From theoretical and empirical two different levels of investment in education and economic growth, reveals the law between them, and our investments in education and economic growth empirical analysis.

本文从理论和实证两个不同的层面探讨教育投资与经济增长的关系，揭示它们之间的规律，并对我国教育投资与经济增长进行实证分析。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切