直交的

Wind and sea may displace the ship's center of gravity along three orthogonal axes; a rectangular Cartesian coordinate system .

风和大浪可能会将轮船的重心移至三者直交的轴线；笛卡尔直角坐标系。

Based on the structure of vector control system for asynchronous electric motor using current model, the favorableness of vector control is validated by making reference of an actual electric motor and utilizing simulink simulation software.

根据使用电流模型的异步电动机矢量控制系统的结构框图，采用交-直-交间接变频器，以实际电机为例，利用simulink仿真软件，验证了矢量控制的有利性。

We give the description of meet irreducible ideals in terms of matrix units in the limit of a direct sum of nest algebras.For each MI-chain ,the ideal I associated with it is meet irreducible.Conversely,every proper meet irreducible ideal is induced by some MI-chain,but there is not a 1-1 correspondence between MI-chain and meet irreducible ideals.

接下来我们用MI-链刻画了套代数直和的极限即NSAF代数的交不可约理想，与MI-链相对应的理想就是交不可约的，任给一个交不可约理想能找到一个MI-链与之对应，但它们不是一一应。

The MIMS then performs a series of orthogonal dynamic rotation tests to determine the moments of inertia about a set of orthogonal axes passing through the CG.

MIMS进行一系列直交动态转动试验，决定一系列直交轴通过中心的惯性力矩。

Temperature field is obtained by Direct Finite Difference Method with parallelepiped mesh elements and the latent heat release is handled with a combination of equivalent specific heat method and temperature recovery method.

计算方法采用直交剖分的直接差分法；潜热处理采用等价比热法与温度修正法相结合的方法；在节约内存量和提高计算速度的基础上尽可能提高计算精度，并在三者之间取得合理平衡；对直交剖分带来的误差采用了热容量修正技术；针对不同铸造合金的凝固特点，对收缩缺陷判据进行了研究和扩展。

We can select the proper voltage vector by the position and magnitude of stator flux as well as the magnitude of torque to keep the system under control even at the range of all speed.

目前的直接转矩控制系统绝大多数采用二极管整流的交-直-交结构，可是这种结构给电力系统造成了严重的谐波"污染"。

The frequency sweep rate shall be 1 octave per minute with an endurance exposure of 20 cycles in each of the orthogonal planes.

频率扫描速度应为每分钟1倍频程的耐力曝光20周期的每一个直交的位面。

Mathematical model、control method、parameter estimation and false tolerance of multiphase permanent magnet synchronous motor electric power propulsion system are studied in this thesis, with the project of "Permanent Magnet Material and 1000kW PMSM Propulsion Motor Technique" and"AC-DC-AC Electric Power Propulsion System Technique"as background, which is important national"The Ninth Five-year Plan"project studied in Advance.

本文是以国家"九五"重点预研项目"永磁材料和1000kW机电一体化永磁同步推进电机技术"为背景并结合课题"交—直—交电力推进系统技术"进行的。

Based on the analysis of control strategy of the system, this paper used respectively voltage oriented and stator flux oriented vector control in grid side and rotor side of the converter.

在分析了该系统控制方法的基础上，建立了交直交变频器网侧电压定向以及转子侧定子磁场定向的矢量控制系统模型。

On the basis of the new theory of vehicle-track coupling dynamics and by means of the dynamic simulation software TTISIM, the dynamic performances of freight electric locomotive of 120?

前言为了满足我国铁路既有干线货运进一步提速发展的需要，加快交直交电力机车的发展，北车集团大同机车厂正在研制新一代 12 0km/h交流传动B0 -B0 -B0轴式货运电力机车。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。