变导的

In this paper the commutate circuit principle and work process of the commutate circuit, the composing and work principle of frequency conversion circuit, main switch element IGBT structure feature turn on and turn-off process dynamic and static switch feature and the work principle of invert were analyzed .

本论文分析了整流电路及相控电路的原理和工作过程；变频电路的组成和工作原理；主开关器件IGBT的结构特点、导通及关断过程、动态静态开关特性；逆变电路的工作原理。

Introduction of covariant derivative into particles field reflects the interaction of particles and field.

通过协变导数引进规范场，虽然体现了粒子与场的作用，但那是让粒子恢复"自由状态"的抵消作用。

According to the inner product feature of sample space this paper takes the differential of fast changing parameters into input samples and puts forward a new neural network not to require to iterate learn, taking it for example recording data of the record system of a type of aeroengine and taking out identification to it.

根据样本空间的内积特性，在输入样本中引入快变参数的导数项，提出了一种无需迭代学习的内积神经网络。

In addition, the proposed stability criteria do not require the monotonicity of the activation functions and the derivative of a time-varying delay being less than 1, which generalize and improve earlier methods.

此外，所得到的结论不需要激励函数的单调性且变时滞的导函数只要有上界结论就可以成立，这拓展和发展了现有的一些结论。

And then have applied the soil being unlike saltness, have reached soil conductance increasing by with soil salinity contents but have been changed into big law.

然后应用不同含盐量的土壤，得出了土壤电导随土壤盐分含量的增加而变大的规律。

Short-term TPN induces steatosis and oxidative stress, which results in apoptosis mediated by the mitochondrial and Fas pathways.

短期的TPN将诱发脂变和氧化应激，这将导致由线粒体和Fas通道介导的细胞凋亡。

Its work principle and structure are presented. Design calculation of the vertical auger attachment, related key technologies and trenching performance of the basic machine are expatiated.

对其工作原理和结构加以介绍，阐述了"变导程"立式螺旋工作装置的设计计算、相应的关键技术和整机的挖沟工作性能。

Whether the upper bound of the derivation of the delay is restricted or not. The results obtained are

的衰减率。所获得的指数稳定性指标也适用于变时滞的导数已知和未知的情况，且比现存的

With the similarity between electromagnetical fields and structural mechanics, the electronic E and magnetic H are considered as two duality variables. With the variational principle, the system is introduced into symplectic geometry of Hamiltonian duality equations.

根据电磁场问题与结构力学的类比关系，把电场量E和磁场量H作为二类变量，通过变分原理寻求一般条件下的解法，将体系导入Hamilton对偶方程的辛几何形式，给出了电磁波导的Hamilton辛体系，并给出了辛本征值问题的表达形式。

A fundamental goal in signal transduction study is to understand allosteric communication .

对变构通讯的理解是研究细胞信号转导的一个基本目标。

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。