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- 与 secondly 相关的网络例句 [注:此内容来源于网络,仅供参考]
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ABSTRACT Aiming at problems of trans-vector controller in a vehicle-carried induction motor such as variable rotor and stator resistance following motor temperature, and their inductance varying with flux saturation degrees. Firstly, CSI and VSI are introduced, for CSI, it can hold the advantages both FOC and DTC using stator flux directional, PI parameter and simulation are also introduced. Secondly, equations of IM in the synchronous rotary frame and its static counterpart, as figuring in the saturation condition of magnetic field, are dealt in this paper and the simulation results are presented. Thereafter, the parameter designing of PI trans-vector controller is processed, which features the non-linear model. In practical realization, as neglecting the dynamical change of motor inductance, this paper employs online modification of inductance parameters, according to the flux saturation, then transforms the non-linear equations into linear ones, and so compacts the structure of controller. Thirdly, in view of the maximum torque output is extraordinary requisite when Electrical Vehicle start up, accelerate, and overtake, this paper issues the maximum torque when both inverter and battery capacity is corporeally definite. Fourthly, on-line differentiating and analyzing both rotor's time constants and its flux by using the expanding order reduction and discrete Kalman filter equation are fathomed, in order to realize high-performance trans-vector algorithm, and also the simulation results are presented. Fifthly, the close-loop regenerative brake system, when the EV's torque is set constant, is deduced; at the same time, unification of electric drive model and brake model is executed. Combined with maximum charge current demands, the mathematical model for online yielding torque as a demand.
本论文针对车载异步电机在矢量控制器所遇到的问题:定转子电阻随温度变化及随电机饱和程度变化的转子电感及定子电感而影响电机调速性能提出一套完整的解决方案:分析了电流型逆变器和电压型逆变器在实现矢量控制时控制器参数的计算,分析出对于电流型逆变器在采用定子磁场定向时,其性能同时具有矢量控制和直接转矩控制两者的优势,并对电压型逆变器在转子磁场定向下的模型进行了仿真研究;建立异步电机非线性模型,推导出考虑磁饱和时异步电机在同步旋转坐标系及静止坐标系下的方程,并做出了仿真结果,建立异步电机在非线性模型下的矢量控制调节器的PI参数设计,在实际应用中,若忽略电机电感的动态变化,可以根据当前的磁路饱和状态而在线修正电感参数,从而将非线性方程线性化,降低控制器的复杂度;考虑到电动汽车在起动和加速超车时需要电机有最大转矩输出,本文讨论在逆变器容量一定和电池供电能力有限的情况下电机最大转矩输出问题;推导了异步电机扩展降阶、离散卡尔曼滤波方程在线辨识转子时间常数和转子磁通,用于实现高性能的矢量控制算法,并给出了仿真结果;推导出了电动汽车恒转矩给定的闭环回馈制动系统,实现了电动控制模型和制动模型的统一,而且结合铅酸电池最大充电电流的要求,为制动转矩在线给定建立了数学模型;设计了基于双DSP系统的高性能矢量控制器软硬件框图,并以大量实验数据说明矢量控制在电动汽车应用的实际应用状况。
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Secondly, to analyze the industrial insurance compensation system under labor laws.
其次,分析了劳动法调整下的工伤保险赔偿制度。
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At first, in this paper the national and international literature of team and team motivation is summarized. Secondly, based on the analysis of theoretical scientific research personnel and team, the teamwork motivation model is built, and it is achieved that teamwork improves the team output. Later,we lead the reputation that is regarded inexplicit incentive into the scientific research personnel"s utility function, establish a model of their reward, analyze the parameter of reputation"s effect to factor in the contract. After that, it analyses traditional training object selection and whole training object selection among the scientific research team to draw the conclusion that the traditional training object selection has obvious limitations and the whole training has evident advantages. In the end, based on the theoretical study of the psychological contract, we can obtain the effective paths of forming psychological contract among the scientific research team.
本文首先对团队和团队激励方面国内外的文献进行了详尽的综述;其次,在对科研人员及科研团队理论分析的基础上,建立了适合科研团队激励机制的基于团队合作的激励模型,得出成员间互相合作将提高科研团队的产出;然后,将声誉效应和职业生涯时间引入科研团队成员报酬契约,建立了科研团队成员的报酬激励模型,分析声誉系数和职业生涯时间对契约中各要素的影响;接着,通过博弈论知识分析了科研团队培训对象选拔制度,得出以下结论:传统培训对象选拔制度在以团队为主的组织中存在着明显的局限性,全员培训制度具有明显的优势;最后,在对心理契约理论研究的基础上,得出了缔结科研团队心理契约的途径。
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Firstly, subtractive clustering algorithm is used to confirm the structure of fuzzy neural network. Secondly, combined fuzzy inference systems to process pattern recognition, its principle and studying algorithm are introduced in detail. Finally, the four kinds of fabric wrinkle feature parameters are imported to verify the true fabric.
首先利用减法聚类方法确定模糊神经网络的结构,再结合模糊推理系统进行模式识别,并详细介绍了其基本原理和学习算法,最后引入4种起皱特征参数对真实织物进行验证。
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Secondly, the author gives some exact values of mb(2 q) for some values of b, which impliesthat the above lower bound is not only the lower bound but also the infimum.
其次,对于部分b值,给出了m_b(2,q)的确切值,从而说明了上面给出的下界值不仅是下界而且是下确界。
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On the whole, we do as follows: Firstly, we list some conceptions and lemmas for later use. Secondly, we define δ-fine partitions for infinite interval and integral of vector-valued functions on infinite interval, and discuss the properties of integral, and characterize its primitives...
主要包括以下五部分内容:在第一部分中,我们介绍了本文所用到的基本概念和引理;在第二部分中,通过定义无穷区间上δ-精细的分法,我们给出了无穷区间上向量值函数的积分的定义,并讨论其性质,还给出了原函数的刻划;在本文的第三部分中,我们着重讨论了无穷区间上向量值函数积分的收敛定理;在本文的在第四部分中,我们首先应用无穷区间上向量值函数积分的收敛定理给出了常微分方程整体广义解的存在性定理,其次应用强积分对Banach空间常微分方程广义解进行了讨论;最后,在第五部分中,我们将模糊积分推广到无穷区间上并给出了其数值计算方法。
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Secondly, the interphase layer is homogenized as a micropolar material model, and the analytical expressions for the local stress and couple stress and their corresponding average are derived for a coated fiber embedded in an infinite matrix under remote classical loading. This exact relation is compared with that determined through an approximate average equivalent inclusion method , and results show that the AEIM has good accuracy to be applied to evaluate the effective property.
就有效性质而言,对于所考察的硬界面复合材料来说均匀界面层的估计要高于非均匀界面层,但两者相差不大;对局部应力分布的预测,均匀界面层与非均匀界面层有较大差别,这说明对于与局部应力密切相关的损伤现象的预测,考虑非均匀界面层是十分必要的。
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Ritualistic death in Sologub's novels is of the same ontological importance. It is first a symbol of destruction and power lost and regained;and secondly, death, as love is in Sologub's eyes, is not only a transition to freedom, eternity, and infiniteness, but a synonym of creating new life.
通过对索洛古勃小说中仪式化死亡的主题的分析,我们可以得出结论,死在索洛古勃的宗教神话体系中同样具有本体论的地位,它首先具有破坏和权力交替的象征意义;其次,索洛古勃心目中的"死"同"爱"一样,是追求自由、永恒与无限的手段,是创造新天地的工具。
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Secondly, the characters of abstract operator are discussed and the operator is proved to be an infinitesimal generator of analytic semigroup.
然后,讨论了构造的抽象算子的基本性质,证明了抽象算子的生成元性质。
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Secondly, on the basis of positive study, we analyses the influent factors of the independence.
其次,从独立董事整体独立性的切入点我们研究了独立性的影响因素。
- 相关中文对照歌词
- The Houseplant Song
- Re-Birth
- Apex
- The Weird Revolution
- Intro / The Brainstream
- Chartreuse
- Hardback (Industry)
- Wolves In Sheeps Clothing
- 1112
- Thank You
- 推荐网络例句
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For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.
为什么呢?因为我的班主任说我严重的违反了校规,于是让我停课三天。
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Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.
他们之中有许多人相信,在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。
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The popular Gawker network of news and gossip sites was shut down by a similar attack on Monday.
周一,深受欢迎的新闻与八卦网站Gawker也因为类似的攻击而瘫痪。