她相信一定是某种环境改变引发了这种大规模离散，应当进一步研究蟾蜍对上述这些变化的反应。
She suggests exploring how toads respond to some of the changes she believes could have triggered their mass exodus.
研究一类离散事件系统和连续时间系统相混合的混杂系统建模与控制器设计问题。
This paper deals with researches on modeling and controller design for a class of hybrid systems which contain both continuous and discrete dynamics.
利用混合单调分解方法研究离散非线性、时变凸多面体系统族的线性状态约束集合的鲁棒正不变性。
In this paper, the robust positive invariance of given linear state constraint sets of uncertain discrete time systems is studied by means of the mixed monotone decomposition method.
本文研究了定义在状态-事件序列上的谓词的离散事件系统的状态反馈控制问题。
This paper studies the problem of state feedback control for discrete event systems, where the predicate is defined on the set of state-event sequences.
他们把研究站点划分为向个离散的区域，并且让不同的数量的动物上在此牧草。
They divided the study site into discrete areas and allowed different amounts of animal grazing on each.
通过离散杆战斗部靶场静爆试验，对离散杆式破片的飞行性能进行了试验研究。
Through the exploding experiment of discrete rod warheads at shooting range, the flight performance of the rods about discrete rod warheads is researched.
研究表明，低马赫数情况下叶轮离散噪声主要是由脉动力造成，为降低低马赫数下的叶轮离散噪声提供了参考。
Results show that under small Mach number the main source of discrete noise is the fluctuating force, which gives a guide for cutting discrete noise down.
在这项研究中，我为离散混沌系统的全球同步建立了一个脉冲控制方法，以及研究了一些全球渐进稳定标准。
In this research, I established an impulse control method for the worldwide synchronization of discrete chaotic system, and researched some standards for global asymptotic stability.
对离散重复控制系统的分析与设计问题进行了系统的研究。
Then, the analysis and design of discrete time RC systems are systematically studied.
本文研究了离散型随机变量次序统计量的分布矩阵的对称性，获得了二个定理。
In this paper, we study the symmetry on distribution matrix of order statistic of discrete type random variable.
其次，研究了离散数据的预处理技术。
Secondly, study the pretreatment technology of the dispersed data.
对低马赫数叶轮离散噪声的机理及计算方法进行了研究，并推导了离散噪声的声压计算式、低马赫数下近似计算式和轴心线上的计算式，还实验验证了计算模型。
Research is carried out on the discrete noise theory and calculation method, the calculation model of discrete noise and the approximate formula under small Mach number are verified by experiments.
组合数学是研究离散对象的科学，正因为有了以组合数学为基础的组合算法，才使人感到计算机好像是有思维的。
It is the combinatorial algorithms which based on a science of studying discrete objects, Combinatorics, that make people feel that computer may have its own thought.
本文研究了有限离散扰动系统的鲁棒干扰解耦问题（RDDPD）。
The robust disturbance decoupling problem of the discrete perturbation systems (RDDPD) is studied.
对股价序列的离散性研究能提供一些用于股市分析和预测的有用信息。
Studies on the discreteness of stock price series can provide useful information to aid market analysis and prediction.
因此，离散变量结构拓扑优化的研究具有重要的理论和实际意义。
Therefore, the research on topology optimization of structures with discrete variables has important theoretic significance and actual significance.
目的研究离散角对反射与透射系数的影响。
Aim To study the effects of walk-off Angle on the coefficients of reflection and transmission.
本文研究了离散型随机变量次序统计量的分布矩阵的对称性，获得了二个定理。
In this paper, we study the symmetry on distribution matrix of order statistic of discrete type random variable. Therefore, we obtain two theorems.
研究人员为每一个情绪测试建立统计离散模型，比如幸福、受辱和爱，得到的结果是一致的与受访者的国籍无关。
Researchers found statistically discrete areas for each emotion tested, such as happiness, contempt and love, that were consistent regardless of respondents' nationality.
研究随机利率下离散时间保险风险模型。
This paper studies the discrete time risk model with stochastic rate.
因而本文研究泊松积分的离散方法。
Methods to discretize the Poisson integral are investigated in this study.
离散是近年来族裔文学研究的一个重要内容。
Diaspora has become an important part of the studies of ethnic literature.
在假定单个目标均匀分布的基础上，运用离散的方法研究并建立单发子母弹对集群目标射击的效率评定模型。
Based on the assumption of uniform distribution of single target, the fire efficiency assessment model of single cluster ammunition attacking group targets was set with discrete method.
本文运用三维有限元方法离散水体，研究了箱形术体的自振频率及动水压力振型。
In this paper, the natural frequencies and modes of box water body researched by using three-dimensional finite element method.
研究了离散孤立子方程的扰动系统。
The perturbation systems of discrete soliton equations are investigated.
研究了一类离散的非线性爆炸方程。
A class of discrete nonlinear breakage equations were considered.
研究离散区间延迟系统的一种特殊形式的渐近稳定性。即分支渐近稳定性。
A special type of asymptotic stability namely componentwise asymptotic stability for discrete interval delay linear systems is investigated.
研究了不确定离散时间系统的变结构控制设计问题。
The design of variable structure control for uncertain discrete time systems is discussed.
通过关于偏差离散度的参数分析方法，研究节点位置缺陷变离散度对空间网格结构临界荷载的影响规律。
The effect of discrete degree of node location imperfection on the critical load of spatial grid structure was studied through the parameter analysis of deviation discrete degree.
利用幂级数的方法，对三阶线性离散系统进行时域分析，其方法不仅可以研究线性非时变离散系统，而且还可以研究线性时变离散系统。
This paper presents the time domain analysis of three orders discrete system by power series, which can study not only the time invariant system, but also the time variant system.
应用推荐