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Periodic visual field and three dimensional disc examination are important for high myopic patients.

定期视野及三度空间视神经的检查在高度近视病患是重要的。

In the overdamped limit the motion of the myosin is periodic, step, which agrees in the experiments.

在过阻尼条件下，肌球蛋白的运动是周期的，阶梯跳跃的，这和实验观察结果一致。

Patients have paradoxic myotonia (myotonia that worsens with repeated activity) and periodic paralysis.

患者表现为反常性肌强直（即在活动中出现肌强直，随持续或反复活动而加重）和周期性麻痹。

In this paper, we deal with the existence of periodic solutions of sublinear Liénard differential equations and Duffing differential equations with singularity.

本文研究次线性Liénard方程和具有奇异性Duffing方程周期解的存在性。

The researchers in the past only considered the existence conditions of the spatially homogeneous periodic solutions of the kind of models, and regarding the delay or the diffusion rate as a bifurcation parameter, the existence conditions of Hopf bifurcation, and the direction of Hopf bifurcation with Neumann boundary condition.

以前的研究者只讨论了此类系统的空间齐次周期解的存在性条件，或是以时滞，或扩散系数为分支参数的Hopf分支存在的条件，以及Neumann边界条件下此类系统的Hopf分支方向。

In the paper, we mainly study the existence and stability of equilibrium of neutral cellular neural network modeland periodic solution of neutral cellular neural network modelwhich both models are described by nonlinear neutral delayed differential equations.

本文主要研究了由非线性中立型时滞微分方程描述的中立型细胞神经网络模型的平衡点和模型的周期解的存在性及稳定性。

"It is difficult to separate from niobium, the element above it in the periodic table , with which it shares many properties."

计算金属结合能的尝试几乎没有超过周期表上的第一行的范围。

Duffing equation has character of immunity to noise and periodic signal with different frequency.

Duffing方程还具有对噪声的免疫力以及对频差较大的周期信号的免疫力等特点。

Selecting proper single valued variable separation functions in the 2+1 variable separation solutions,we construct many types of single valued coherent soliton structures such as dromion,dromion lattice,solitoff,2-solitoff,static and kinetic breather,instanton,compacton, peakon,and so on.The interactions among these coherent localized excitations including the collisions of compaction and compacton,peakon and peakon,line soliton and y-periodic soliton,dromion and dromion,dromion and solitoff,et al,are investigated analytically and graphically,and found that can be elastic and nonelastic respectively,which reveal various exotic and important nonlinear characters and interaction properties.

在2+1维分离变量解中选择适当的的单值分离变量函数，构造了2+1维非线性波动模型多种单值相干孤子结构如Dromion，Dromion格子，Solitoff，2-Solitoff，静止和运动呼吸子、瞬子、Compacton、Peakon等；考察了一些典型的非线性激发模式间如Compacton和Compacton，Peakon和Peakon，线孤子和y-周期孤子，Dromion和Dromion，Dromion和Solitoff之间等相互作用行为，发现其相互作用可以弹性的也可以是非弹性的，揭示了多样奇异而重要的非线性特性。

Firstly, we discuss the synchronization of identical coupled systems. Secondly, we discuss the the synchronization of nonidentical coupled systems. Finally, we discuss the synchronization of the coupled systems with external periodic driving.

在这部分首先讨论恒同耦合系统的同步，再讨论非恒同耦合系统的同步，最后讨论了有周期外力驱动时耦合系统的同步。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。