查询词典 random

Reporters do not actively go out to many random areas and see if anyone has been killed in a violent attack, but wait for reports to come in.

记者们并不积极地随意跑到各个地方看看有没有人因某次暴力袭击而死，而是等待着报导材料的出现。

The least absolute deviation of the random censored data nonlinear regression model ［J］.

随机删失数据非线性回归模型的最小一乘估计［J］。

When the random error is not subject to normal distribution, the least absolute deviation estimation is superior to the least squares estimation. In addition, the robustness of the least absolute deviation estimation is also better than that of the least squares estimation.

在随机误差不服从正态分布的问题中，最小一乘估计的统计性能优于最小二乘枯计；另外，最小一乘估计的稳健性更强。

Suppose Y is an absolutely continuous random variable symmetric about 0 with probability density function f and cumulative distribution function F.

假设Y是一绝对连续且对称於0的随机变数，其机率密度函数为f，而分布函数为F。

Illustrate the reflection principle for a random walk with one absorbing barrier and show the Boyle-Lau algorithm for pricing single barrier options.

1973年，Black-Scholes开创性论文"期权定价与公司债务"的发表标志著期权定价理论的诞生。

I start my oil painting from the random abstractness with some consideration of colors.

我画油画从抽象入手，画之前没有任何想法，最多有点色调上的考虑。

Although stocks' returns are the main concerns for almost all of the academical researches about stock market, returns' random processes are even more important for correct investment decision making, because they provide the basic information about capital ri

在几乎所有的关于市场的学术研究中都会涉及到股票的收益率，而在股票市场，对收益率随机过程的充分认识是作出正确投资决定的基础，因为它提供了有关资产风险的基本信息。

This generator is based on acceptance-rejection technique, however, in theory, when the number of rectangle preponderates over 255, the acceptance probability is higher than 99.1%, with 98% of the time the required random variable is produced simply by doing a multiplication.

该算法基于接受－拒绝抽样技术，理论分析表明当矩形数大于255个时，该算法的抽样效率大于99.1%，而且98%以上的时间内仅需进行一次简单的乘法运算。

It includes as follows:(1) That the right acceptance probability to decide the initial value temperature should be 0.6 are presented by experiment. For the first time, crossover and mutation operator are used in populations to calculate the initial value of temperature. At least the initial value of temperature is 〓.(2) Replacing random change operator with crossover and mutation operators.

2使用遗传算法中交配与突变代替模拟退火算法中随机扰动操作，对两种操作方法进行定性分析，得到突变和交配操作与随机扰动方法在本质上的一致性；同时首次提出在不同温度条件下，使用不同的比例因子，控制参与交配与突变的基因位数，实现了二次使用模拟退火算法的过程。

The author deduced a formula to compute theaccidental coincidence of the random signals. With this formula thebackground due to the accidental coincidence of the μ chamber iscalculated.

推导了多个随机信号发生偶然符合的计数率计算公式，并用这个公式对L3μ漂移室产生的偶然符合本底进行了估算。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。