本文提出了绕线式感应电机转子回路电阻的斩波调节原理，设计了双环调速系统，并进行了计算机辅助设计和仿真研究。
This paper presents a chopper adapting principle of rotor's resistance of induction motor, develops a two loops speed governing system, and gives computer simulation results.
在变包角板形测量系统中，无辊环式板形辊上传感器受力状态与包角大小有直接关系。
In varying wrap Angle flatness measurement system, the value of wrap Angle has a direct influence on the mechanics status of transducers.
介绍了超声波式烧结环冷机料层厚度测量仪的系统构成和工作原理。
In This paper, the system composition and working principle of the material thickness measuring meter of ultrasonic sinter-circle-cooling machines are introduced.
介绍了环式焙烧炉天然气供气监控系统、燃烧架的结构与功能及加热炉室温度控制过程。
The natural gas supply control system, structure and function of burning frame as well as temperature control procedure of furnace of the annular baking furnace are introduced.
剖析绿地系统规划中存在的问题和矛盾，提出城市绿地系统应该采用环网式的布局结构，使城市生态系统达到相对的稳定，使新建绿地与原有绿地能很好地衔接起来。
In order to analyze the problems and contradictions of green space system planning in Changchun, I suggest the urban green space system should adopt the layout structure of ring and radial.
紧急制动是桥式吊车自动控制系统中保障系统安全性的重要一环。
Emergency braking plays an important role in the safety of overhead crane systems.
建立了有内导向瓣周边式对接机构的两空间飞行器对接过程的动力学模型，建模中将对接系统简化为主动飞行器、被动飞行器和主动捕获环三体问题。
The mathematical models of docking dynamics in the process of capture are established for two spacecrafts with inner guide petal peripheral docking mechanisms.
本文研究了平面多项式向量场的全局与局部分叉，旨在研究高次平面非线性动力系统多极限环的存在性以及极限环的个数及其相对位置关系；
The main aim of this dissertation is to study the exist of limit cycles of plane nonlinear dynamic system of high degree and the number and the configurations of limit cycles.
浮环密封和接触式机械密封需要密封油及油液控制系统，其控制系统复杂、维护费用高、污染严重、能耗较大、稳定性较低；
The two kinds of shaft seal have several disadvantages, for example, complicated control system, highly maintenance cost, serious contamination, more power consumption and lower stability.
根据锁相环的原理，使用反射式光电传感器实现了系统的颜色识别。
According to the theory of phase-locked loop, we use reflected photoelectric sensor to carry out the color recognition.
本课题采用的闭路循环式密闭通风除尘系统，使用环隙喷吹脉冲滤袋除尘器。
The effectiveness of an air tight ventilatory dust exhaustive system with closed circuit cycle and pulse fissure blow filter bag was studied.
经现场应用表明，该模型可用于无辊环式板形辊的变包角板形测量系统中，为实现精确的板形控制提供条件。
The practical applications show that this model can be utilized in a flatness measurement system whose wrap angle is variable. At the same time , it provides a basis for flatness control.
该系统采用多层环阶梯式多级计算机控制。
In the capture trails system a multi-level ring ladder type of multiple-order computers is adopted.
本文成功研制了一种新颖、实用的旋转体动态数据采集系统—非接触式集流环。
A new and practical instrument to collect the dynamic data of rotors has been developed.
随着嵌入式系统的广泛应用，以及诸多领域对于图象数据的需求，使得图象采集成为了这些系统实现的关键一环。
Taking a practical system as an example, implementation method of image acquisition by designing classes with VC++ was analyzed.
结果表明，在所选择的六种方案中，水环热泵系统的费用年值最小，是一种最为经济的户式中央空调系统形式；
The results show that the total annual cost of water loop heat pump system is the minimum among the six systems, which is the optimal option under the given conditions.
本文研究一类五次平面多项式系统赤道极限环分支问题。
In this paper, the problem of limit cycles bifurcated from the equator for a quintic polynomial system is investigated.
首次证明了拟五次多项式系统在无穷远点能分支出7个极限环。
It is the first time that 7 limit cycles can bifurcated from the infinity for a class of quasi quintic system.
通过对环式阳极焙烧炉的热工过程进行系统理论分析，建立了焙烧炉热工过程的数学模型。
Through the systematic analysis of ring anode baking process, a mathematical model was developed. Several simulation runs were then made.
第五章讨论了一类可化为abel方程的五次多项式系统的极限环的个数，得到此类平面五次多项式系统至多存在两个极限环的充分条件。
In the fifth section, we obtain some sufficient conditions under which a class of a planar quintic system has at most two limit cycles by transforming it into Abel equation.
第五章讨论了一类可化为abel方程的五次多项式系统的极限环的个数，得到此类平面五次多项式系统至多存在两个极限环的充分条件。
In the fifth section, we obtain some sufficient conditions under which a class of a planar quintic system has at most two limit cycles by transforming it into Abel equation.
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