查询词典 frame up
- 与 frame up 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Therefore, based on the general frame system of human resource department"s performance improvement, the system and approaches of dynamic human resource department"s performance improvement under condition parameter preference have been brought up.
因此,本研究在人力资源部门绩效提升的一般框架体系的基础上,提出情境参数优先的动态的人力资源部门绩效提升的体系和途径。
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Corrosion can damage your bicycle frame, incapacitate your steering or stop up your chain and gearing.
腐蚀会损害您的自行车框架,弄坏你的指导或停止您的链和传动装置。
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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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The trajectory theory model of air target was made up according to its basic rule of flight control. A stochastic difference equation to model the air target movement in inertial frame coordinates was introduced.
根据空中目标飞行控制的基本规律,首先建立了空中目标航迹分布的理论模型,并在惯性坐标系中建立了基于随机微分方程的目标运动模型。
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Smooth pictures with a RGB delta arrangement Supports NTSC/PAL Built-in picture quality improvement circuit Up/down and/or right/left inverse display function LR surface treatment provides an easy-to-see display even outdoors Dirt-resistant surface treatment Narrow frame
与一个RGB三角洲安排支持NTSC / PAL制式平滑图片内置图像质量的改善电路上/下和/或左/右逆显示功能的LR表面处理提供了一个易于看到显示器,即使在户外越野性表面处理窄框
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The method introduces a light-proof board,and it has higher ratio of effective exposure ,thus the frame rate is raised up to 400fps.
该方法将帧频提高到了400帧/秒,具有较高的有效曝光比,并进一步改善了图像的质量。
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To avoid the influence of head position change and to overlap and compare the changing hard tissue under the skull reference system, this work set up a three-dimensional reference frame, which was based on point"S'"(the median point of the upper rear brim of the anterior wall of pituitary fossa), point"Na"and point"Ba"and of which point"S"is origin. UNISIGHT is used to get the original coordinates of all the landmarks in the MPR phase.
为消除矫治前后患者头位变化的影响,使治疗前后变化的上下颌骨和牙列以相对不变的颅底结构作为参照系统进行影像的重叠和对比,本研究通过头颅内的固有标志点S',N,Ba三点确定了参考平面,建立了以S'点为原点的测量三维坐标系。
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The author thin ks over mome problems in the sketch teaching by making comparisons, and tries to set up the frame of the sketch teaching suitable to art design subject.
文章对素描教学中遇到的诸多问题进行思考,试图构建起适合艺术设计学科素描基础教学的框架
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The result shows that there were two transcriptions in Muscovy duck, MSTN-1(EU336991) and MSTN-2(EU336992). MSTN-1 and MSTN-2 were 1128 bp and 754 bp separately, with homology up to 94%. MSTN-2 included an open reading frame, encoding 124 amino acids.
结果表明,番鸭体内存在2种MSTN基因转录本,MSTN-1(EU336991)和MSTN-2(EU336992),大小分别为1128 bp和754 bp,同源性为94%;且MSTN-2是一个全新的MSTN转录本,含有1个开放阅读框,可编码124个氨基酸。
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Methods The recombinant sequence for two CEA epitopes was tandemly engaged and inserted into-upstream of in-frame-varied HSP70 of Mycobacterium tuberculosis to construct a gene vaccine.Balb/c mice were muscularly injected with recombinant DNA vaccine;negative control (mice were injected with normal saline), positive control (mice were injected with DNA vaccine harboring tandem CEA epitopes plus aluminium hydroxide adjuvant) and experimental group(mice were injected with PCITri CEA625-667-met HSP70) were set up.
在已经构建含有变异热休克蛋白序列的基础上,插入重组CEA串联表位的编码片段获得CEA串联表位-HSP融合基因疫苗。3次肌肉注射免疫Balb/c小鼠,设立注射生理盐水的阴性对照组、注射氢氧化铝佐剂混悬CEA串联表位的阳性对照组及注射pCITriCEA625-667-mtHSP70的实验组。
- 推荐网络例句
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Plunder melds and run with this jewel!
掠夺melds和运行与此宝石!
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My dream is to be a crazy growing tree and extend at the edge between the city and the forest.
此刻,也许正是在通往天国的路上,我体验着这白色的晕旋。
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When you click Save, you save the file to the host′s hard disk or server, not to your own machine.
单击"保存"会将文件保存到主持人的硬盘或服务器上,而不是您自己的计算机上。