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- 逆大陵变量
- 更多网络例句与大逆相关的网络例句 [注:此内容来源于网络,仅供参考]
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In this paper, taking the downward continuation of potential field as an inverse problem of upward continuation, we obtain a convolution type linear integral equation for downward continuation. Making use of the orthogonal symmetry characteristic of Fourier transform matrix, and combining the principles of singular value decomposition of matrix and generalized inverse, we proposed a stable generalized inverse method for downward continuation of potential field, called wavenumber domain generalized inverse algorithm, which doesn't need the computation for inverse matrix. It resolves the instability of potential field downward continuation of large depth.
本文通过把位场向下延拓视为向上延拓的反问题,得到向下延拓的褶积型线性积分方程,再利用Fourier变换矩阵的正交对称特性,并结合矩阵的奇异值分解和广义逆原理,提出了一种稳定的不需要进行求逆运算的位场向下延拓广义逆方法——波数域广义逆算法,解决了位场大深度向下延拓的不稳定性问题。
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By the means of theory, simulation and experiment, the second part of this paper is then analyzed which is on the equivalent output resistance and inductance of the selected inverter and the effect to the output voltage"s amplitude and phase caused by the different values of the inverter"s component. It is concluded that by selecting certain precision level components, the difference of the output voltage amplitude is much greater than that of the output voltage phase.
其次通过理论、仿真和实验分析了本文所采用的电压电流双闭环瞬时控制方式逆变器的等效输出阻抗和两台逆变器器件差异对输出电压的幅值差和相位差的影响,从而得出选用一定精度的器件,两台逆变器输出电压的幅值差比相位差大得多的结论。
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Examples may be found in high treason and breaches of the law relating to vaccination.
在大逆与对有关接种疫苗的法律的违反中可以找到例子。
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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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Research and Design of Push-Pull Forward and Soft-Switching Circuit
本文结合推挽正激直流变换器和高频脉冲直流环节逆变器的优点,提出了一种适用于低压大电流输入场合的逆变器,并对构成这种逆变器的电路拓扑、SPWM控制策略、稳态原理特性进行了深入的分析研究。
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It is found that thrusting deformation in the accretionary prism is accommodated not only by deformation within largescale thrusting zones, but also by deformation along secondary thrusts and potentially more importantly along corescale structures such as microfaults and deformation bands.
发现逆冲变形不是只在大尺度的逆冲断层面上进行,而是弥散分布在主逆冲断层面、次级逆冲断层面以及断层面之间的更小的尺度上。
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Analyzing the calculating process of belt conveyor with high angle theoretically, starting from its theoretic calculate the cross sectional area of materials and peripheral force, shaft power of drum, power of motor, using point by point method to get the resultant strain of every drum and torsion of driving drum, calculating the maximum strain and the maximum reverse stopping torque, to give the support on theory for using belt conveyor with super-long distance, high angle under the coal mine.
本文针对长运距、大倾角、高强度带式输送机设计过程中存在的问题,从四个方面对大倾角带式输送机进行分析研究:从理论上解析大倾角带式输送机的计算过程,从大倾角带式输送机的理论入手,详细计算物料的横截面面积、圆周力、滚筒轴功率和电机功率,利用逐点计算法计算各个滚筒的合张力以及传动滚筒的扭距,计算出胶带的最大张力和最大逆止力矩,给长运距、大倾角皮带机在煤矿井下的使用给予理论上的支持。
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During this years, TCM has a prominent effect on Dysfunctional Dyspepsia,so we study the effect of SiNiSan of soup on the Dysfunctional Dyspepsia sharply from the ability of stomach emptying and the ability of intestines pussing on the normal Kunming rats by the coloring matter,and the chang of the nerve fiber, nerve qualitative, on the stomach organize of normal SD ratsMethods:In the experiment, the thirty Kunming rats, whose avoirdupois are about twenty grammes,and thirty S. D rats, whose avoirdupois are about two hundred grammes,were randomly divided into three groups, 0. 9yS group, SiNiSan of soup group and Mosapride Citrate group.
本课题通过对正常小鼠胃内葡聚糖蓝-2000残留量、小肠内葡聚糖蓝-2000推进率,来研究四逆散对小鼠胃排空、小肠推进的影响;通过采用正常大鼠肠道气囊法,记录正常大鼠用药后肠收缩幅度和频率的变化;采用医学彩色图象全自动分析系统,分析用药后正常大鼠胃窦组织中NOS阳性神经元分布面积和酶活性的变化;采用硝酸酶还原法和比色法,检测用药后正常大鼠胃窦组织中NO和TchE的含量变化,通过以上几个方面,研究四逆散的促胃肠动力作用及其作用机制。
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The magnitude-8.8 quake was a type called a "megathrust," considered the most powerful earthquake on the planet. Megathrusts occur when one tectonic plate dives beneath another.
智利发生的这场里氏8.8级大地震属于&大逆冲型地震&,只有当一个地壳板块俯冲至另一板块的下方时才会发生,被认为是地球上威力最强的地震。
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Experimental Center of National Level One, Hubei Traditional Chinese Medica l College, Wuhan 430061)Abstract To investigate the protective effects of Jiaweisinisa n on acute liver injury induced by intraperitoneal injection of D-ga lac-tosamise, serum superoxide dismutase, malondialdehyde , glutathioe contents were measured. The pathological changes of liver wer e observed simultaneously. The results showed that JWSNS could decrease serum MD A content, but increase serum SOD and GSH activities in acute liver injury induc ed by D-GalN. It was also found that JWSNS could alleviate the degeneration and necrosis of the hypatocytes.
为研讨加味四逆散防治肝损伤的作用机理,通过动物试验,先用加味四逆散预防给药,再采用D-氨基半乳糖造成大鼠急性肝损伤模型,然后检测大鼠血清超氧化物岐化酶、丙二醛、还原型谷胱甘肽水平,同步观察该方对急性肝损伤大鼠体内脂质过氧化反应及肝脏病理改变的影响,结果表明该方可明显升高大鼠血清SOD、GSH水平,降低MDA水平,肝脏病理学检查亦表明该方使肝细胞变性坏死程度减轻。
- 更多网络解释与大逆相关的网络解释 [注:此内容来源于网络,仅供参考]
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Converse:逆
这里 Cnv 是"逆"(converse)的缩写.它是一个关系对其逆的那种关系.例如,较大对较小的关系,父母身分对儿子身分的关系,前对后的关系 等等.我们有 为了有更短且常常更简单的记法,我们给出① 参见前面提到的文章>,
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moment of inertia:惯量
逆动性的大小也有三个影响的因素: 外界作用力愈大,其逆动性也愈大; 转子的转动惯量(moment of inertia)愈大,逆动性愈小; 转子的角速度愈大,逆动性愈小.
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spasmodic mydriasis:痉挛性瞳孔开大,痉挛性瞳孔开大
spasmodic hiccup 痉挛性呃逆,痉挛性呃逆 | spasmodic mydriasis 痉挛性瞳孔开大,痉挛性瞳孔开大 | spasmodic sneezing 痉挛性喷嚏,痉挛性喷嚏
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Inverse peak voltage:最大反电压
inverse operator 逆算子 | inverse peak voltage 最大反电压 | inverse permeability tensor 逆渗透率张量
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regicide:大逆
regicidal 大逆的 | regicide 大逆 | regie 专卖
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antalgol:逆大陵变星[古];天琴[座]RR[型]变星
anorthosite 斜长石 | antalgol 逆大陵变星[古];天琴[座]RR[型]变星 | antapex 背点
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regermination:再发芽
regermination 再发芽 | regicidal 大逆的 | regicide 大逆
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regicidal:大逆的
regermination 再发芽 | regicidal 大逆的 | regicide 大逆
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regicidal:弑君王的; 大逆的 (形)
reggae 雷盖配乐歌曲 (名) | regicidal 弑君王的; 大逆的 (形) | regicide 弑君, 大逆者, 大逆 (名)
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thrust fault:逆冲断层
如果断层面与水平面的夹角小于或远远小于45度,这种情况的断层就被称为逆冲断层(thrust fault),也有说法是'大逆冲',往往指的是断层面的角度接近水平程度.