查询词典 simulations

Simulations are carried out upon square-aperture beam using Legendre polynomial. Conjugate gradient method is used and optimization is performed for several steps to reduce executing time.

针对方光束口径，利用 Legendre 多项式模拟光束波前分布，利用共轭梯度算法对多项式系数进行了优化计算；优化过程分为几步进行以减少计算时间。

It implies that they have a highly developed consciousness, including life-like mental simulations of potential events.

这表示他们有高度发展的认知能力，包括对可能发生事件做逼真的心智模拟。

Based studies were done on radiation spectrum, voltage to current character and modulation property of white LEDs when they are used as optical transmitters. Then the configuration and systematic design techniques are concentrated concerning white LED lighting source communication with numerical analyses and computer simulations done as well as high speed modulation techniques, visible light receiver design and means to alleviate inter symbol interference along with background noise problem.

在对白光LED用作通信光源时的光谱特性、伏安特性、调制特性等物理特性做深入分析的基础上，重点研究了白光LED照明光源通信系统的组成结构和系统设计，进行了数学计算分析模拟，并设计出了白光LED高速调制电路和可见光接收电路，并就如何削弱码间串扰和背景光噪声对通信系统的影响进行了讨论分析。

Meanwhile, the result of simulations shows that the heterogeneity of degree distribution and local spatial interaction are key factors affecting the malware propagation and immunization.

同时，研究指出网络中度分布的异质化程度和网络的局域空间交互特征是影响传播及免疫行为的关键要素。

According to the localization principle of the DV-Hop algorithm, this paper proposes three improvements including the estimation of average single hop distance, the calculation of distance between unknown nodes and reference nodes and the estimation of node positions. These improvements can be used independently or jointly to replace the corresponding steps in the DV-Hop algorithm. The localization performances are analyzed in theory and with simulations.

该文根据DV-Hop算法定位过程，在平均每跳距离估计、未知节点到各参考节点之间距离的计算和节点位置估计方法等3个方面进行了改进，分析和仿真了不同改进措施和综合改进的定位性能。

This algorithm dynamically changed the initial value of collision window and the increasing extent of backoff by using the logarithmic function which took the numbers of network nodes as variable and reduced the probability of collision of data transmission, and the network simulations were carried out by the OPNET software.

该算法使用以网络节点数为变量的对数函数，动态调整竞争窗口初始值和窗口退避增大幅度，降低了数据传输的冲突概率，利用OPNET软件实现对退避算法的网络仿真。

The tensile strength and the elastic modulus were assumed to obey Weibull and logarithmic normal distribution and the other mechanical parameters were taken as constant values in the simulations of three-graded-concrete supported beam. The random aggregate random parameters model was established, which is very close to the actual structure. The results show that the nonlinear behavior of higher homogeneous specimen appears later obviously; the influence of random distribution of elastic modulus on the mechanical character is very little in linear range, while great in nonlinear range; random distribution of tensile strength affects the strength and the damage threshold of concrete obviously.

对三级配混凝土简支梁进行数值模拟时，假定各相材料的抗拉强度和弹性模量服从Weibull、对数正态两种随机分布，其他力学参数取定值，生成和实际结构比较接近的随机骨料随机参数模型，数值模拟结果表明材料均质度较高的试件出现非线性行为的时间要明显滞后于均质度较低的试件；弹性模量分布的随机性对材料线弹性段力学性能的影响极小，而对非线性区域的影响较大；材料强度分布的随机性对混凝土的强度和损伤阈值有较大的影响。

According to the mean-field simulations of the model,the time series of logarithmic price returns exhibit bursting typical of volatility clustering.

但是目前现有的模型在描述现实市场中一些经验现象时，缺少详细合理的经济解释，或者只是描述了现实市场中的部分性质。

Particularly the Lorenz system is discussed as example and the simulations are given.

具体对Lorenz系统进行研究，并给出数值模拟。

Or interactive simulations because of their low memory cost and good performance in both rendering quality and speed.

由於它耗用的记忆体成本很低而且有很好的效能表现无是绘图的品质或速可以兼顾。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。