The ml converter splits voltage constraints among series - connected switches through the flying capacitors , so keeping the flying capacitor voltages at proper value is very important 该变换器利用飞跨电容使得输入电压在串联的各开关管之间均分,以降低开关管的电压应力,因此飞跨电容电压保持在适当值是保证变换器正常工作且具有良好性能的关键。
Abstract : a new kind of variable frequency speed - governing experiment system which has the structure of two parallel inverters at dc bus and output of inverter driving two series asynchronous motors at the same shaft is presented in this paper 文摘:提出了一种双逆变器直流母线并联、变频输出驱动同轴串联的两台异步电动机结构的新型变频调速实验系统。
The main design procedure involves the use of a feasible approximation method to establish a finite - dimensional and interconnected nonlinear dynamics , and then utilize the cascaded nonlinear feedback design for achieving uniform output regulation 主要设计方式拟先采用可行近似方法建立一有限次元及内都串联的非线性动态，接著利用串级非线性回馈控制设计使得均一输出能规则化。
We prepared sample l , sample 2 with single coil . and sample 3 , sample 4 with two series coils . in this paper we discussed the frequency - dependence of theis inductance , resistance and quality factor ( q - value ) in a range of l00mhz - l0ghz 本实验中制作了单个线圈的样品1和样品2以及串联的样品3和样品4 ，文中报告了这些薄膜电感的电感、电阻和q值在100mhz - 10ghz范围内的频谱特性。
The commodity economy was developed until today , and the initiative of the market has already been transfered from enterprises to consumer s hands . the convergence of the enterprise and products enabled competition to become fiercer . in the face of numerous units by supplier , manufacturer , general headquarters , branch company , office , warehouse , shop , distributor , customer that the products contact , the traditional form of operation and administration of enterprises faces the challenge 商品经济发展到今天，市场的主动权已从企业转移到消费者手中，企业和产品的趋同使竞争日趋激烈，面对由产品串联的供应商生产商公司总部分公司办事处仓店铺经销商顾客众多单元，企业传统的经营管理方式面临挑战。
A qualitative analysis and computer simulations show that airflow reversal can occur in a non - diagonal airway parallel to the airway on fire in a horizontal ventilation network due to the pressure increase induced by cooling of fume in the airway connected in parallel to the non - diagonal airway but in series with the one on fire 摘要通过定性分析和计算机模拟发现：在水平网络火灾中，非角联旁侧分支也能发生风流逆转，引起逆转的动力是与该分支并联但与著火分支串联的分支中的冷抽力。
This paper studies the typical two - unit series maintained system , the distributing of the units life have been known . by random sample to the life of units and simulate with computer , uses monte - carlo method , counts the failure time of every unit , and failure rate - the reliability character of two - unit series system is derived , together with its curve 摘要研究了典型的两元件串联的可修系统，在已知元件的寿命分布的条件下，应用蒙特卡罗方法，对元件的寿命进行随机抽样并进行计算机模拟，通过统计每个元件故障的次数，得出了两元件串联可维修系统的可靠性特征量故障率，并绘出了曲线。
Similarly to other methods for smart rotor , the most important and difficult problem is the design of the actuator . first , the piezoelectric smart material has been studied and an actuator with piezoelectric stack has been proposed in the mode of parallel connection in electrics and series - wound in mechanics according to the property of the piezoelectric porcelain . second , a 2 - x actuator has been designed with the piezoelectric stack active part according to the triangle theory 本文首先对压电智能材料进行研究,根据压电陶瓷的特点,采用电学并联、力学串联的设计模式,提出一种压电堆主动驱动部件,在此基础上,根据三角形放大原理,设计了推挽式双x放大机构,并将压电堆主动件应用于推挽式双x机构,形成了推挽式双x驱动器。
Where g is the domain of integration that is the curved polyhedron , and x p , where g , g , ( i = 1 , 2 , . . . s ) is the domain of integration that is the curved polyhedron , chapter 3 deals with the computer simulation on the multiple random current and lifo multiple service desks mixed queuing system modles in discrete event system G一u乓， ( :一‘ ， 2 ，第三章讨论了多随机顾客流且后进先出的先有ul个服务台并联，然后有v个服务台串联，最后有uz个服务台并联的串并联混合和先有vl个服务台串联，然后有u个服务台并联，最后有vz个服务台串联的串并联混合多服务台排队系统模型的计算机模拟
