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The transient air gap magnetic fields under different conditions are also calculated and analyzed. The novel finite element method directly using magnetic induction as unknown variable has many advantage. It is analyzed theoretically in detail. Nonlinear eddy current field equations and finite element equations using magnetic induction as unknown variable are developed.

直线电机的磁场是一非均匀、非线性的涡流场，文中对非均匀磁场及材料的非线性进行了分析，提出了相应的解决办法，采用以向量磁位为求解量的传统有限元法，对不同合闸角下筒式复合次级圆筒型直线感应电机的瞬态特性进行了计算与试验分析，对不同条件下瞬态气隙磁场进行了研究。

Some costs include both a fixed and a variable costs element. They are called semi -variable costs or mixed costs.

有些成本同时包含固定成份和变动成份，它们被称为准变动成本或混合成本。

This paper has introduced briefly the good and shortcoming of the GPS technology and machine visual technical in the variable machinery application, and the development status of the variable mechanical based on machine vision's key techniques have been explained in detail, such as light source, capturing dynamic image (CCD camera and image frame grabber), image processing , fast accurate actuator, and so on.

1引言精细农业生产技术是现代农业工程技术的重要标志之一，是利用现代信息技术、机电一体化技术对传统农业机械进行改造的主要方向。研究和开发以"空间差异"准确定位定量操作的"变量"农业机械是今后农业机械化研究的重点方向，其相关技术和设备的研究已成为国际上正在研究的重点课题。

If a variable is used in a code block but not defined there, it is a free variable .

如果某名字在代码块中有所使用，但并不在该块中定义，就称它为自由变量。

If the nearest enclosing scope for a free variable contains a global statement, the free variable is treated as a global.

如果某自由变量的最近封闭作用域包括一个global语句，那么这个自由变量就当作全局变量处理。

After that, the analytical formula of the free boundary variable s versus time variable t in the two phase cylinder group melting process. The formula is important to study the factors affecting the group melting.

求出两相圆柱团熔融过程中固液界面s与时间t的解析表达式，它对分析研究影响物料团熔融的相关因素起着重要作用。

With the new model and the program, steady seepage field in work period, free surface position variable law with time at upper reaches in unsteady seepage period and seepage field variable law on the condition of different seepage coefficient and water decrease speed are stimulated.

利用建立的模型和编制的程序能模拟正常运行期的稳定渗流场、非稳定渗流期上游水位变化时自由面位置随时间的变化规律以及不同的水位下降速度时渗流场的变化规律。

Using of the biomechanical method and the dynamical method , with control and without control of the same action redundancy free degree as stimulus variable , with the minus of explosive strength as dependent variable , compary with different sections testing results , qualitative and quantitative evaluation to jumpping movement coordinative ability.

运用生物力学方法与人体运动的动力学方法，以相同动作冗余自由度的控制与不控制作为刺激变量，以动作爆发力表现水平的差值为因变量，通过对两组不同水平被试测验成绩的比较，对跳跃专项动作协调能力进行了定性与定量评价。

In this system,the VVVF(variable voltage variable frequency) control method based on magnetic flux trajectory is applied.In the system,it is the target for the magnetic flux linkage polygon to be greatly approximate to the ideal magnetic flux circle.Considering such limitations as the low speed torque ripple,high speed real time and the working frequency of switching element,through the subsection synchronization control method by applying different numbers of magnetic flux linkage polygon for different frequency range,the perfect precision specifications for speed can be obtained.

系统采用基于磁通轨迹法的他控式变频调速方案，以磁链多边形尽量逼近理想磁通圆为目标，并考虑低速转矩脉动、高速实时性和开关元件的工作频率限制等约束条件，通过采用分段同步控制方式，在不同的频段采用不同的磁链多边形边数，使系统获得了优异的转速精度指标。

In this paper, five equivalent conditions of the definition and five special nature of analytic function are given, and followed by their mutual equivalence of the proof , the relationship between the equivalent conditions and the nature of analytic functions is revealed, which can help us to learn the concept of complex variable function in deep depth and make analytic functions an important role in complex variable function.

本文依次给出了解析函数的五个等价条件及五个性质，并通过对它们相互等价性的证明，导出了解析函数等价条件与性质之间的关系，更加深入地揭示解析函数这一概念的内涵，展示出了解析函数在复变函数论学习中的重要性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。