查询词典 unit factor

With the merits of space vector modulation: digitized control,harmonic decrease,high ratio of voltage used,fast dynamic response and so on,and at the same time deadbeat and DSP control is introduced, as well as two-loop control of the system,we gained power factor is near unit and current THD is well below 10% in our digitized arc welding power system.

基于空间矢量脉冲宽度调制技术的易于数字化、可降低谐波、电压利用率高、动态响应快等特点，引入无差拍思想、总体系统的双环控制思想和DSP控制，实现了功率因数为1，电流谐波畸变远小于10％弧焊电源系统的数字化。

We choose the TMS320VC5402, digital signal processor, as the computing unit, filtering the sampled signal, truncating the harmonic whose frequence greater than 2500hz, then we use the window-interpolation FFT algorithm to get the refined frequence, amplitude, phase of harmonic in sampled voltage and current, other parameter such as harmonic ratio, active power, reactive power, power factor, three-phase unbalance can be also computed base one the result of window-interpolation FFT.

选用TMS320VC5402高速数字信号处理器作为运算单元，先对采样信号进行数字滤波，去除50次以上谐波分量，然后应用加窗双峰插值FFT算法计算电压电流的各次谐波频率、幅值和相位，以及谐波含有率、有功功率、无功功率、三相不平衡度等各项电能指标，同时利用锁相环电路硬件跟踪电网频率以减小采样失步度。

The study probe into at when extreme rainfall happenning incident research purpose department on city, estimate its flow of flood crest to defend and provide disaster relief the reference carried on the exercise of in follow-up ; While estimating the the depth of extreme rainfall , use separately: World Meteological Organization statistic method, storm transposition and dew point adjustment method and average recurrence interval rainfall depth factor method, inquire into and act as river valley wutu the upper reaches of Keelung and collect in the water area separately, wutu station with flood-diversion stands in the Huo-Shao-Liao station before Yuan-Shan-Tzu flood-diversion, the depth when the extreme rainfall happens separately, step forward and mix the set of design hyetograph by extreme rainfall ,finally,mix geomorphologic instantaneous unit hydrograph afterwards, in order to estimate the flow of flood crest produced cause by extreme rainfall incident .

本文之研究目的系探讨当极端暴雨事件发生於都会区时，推估其洪峰流量以作为后续防救灾演练之参考。在推估极端暴雨之降雨深度时，分别采用：世界气象组织统计法、暴雨移置与露点调整法及平均重现期距雨量因子法，分别推求当基隆河流域五堵上游集水区，员山子分洪前之火烧寮站与分洪后之五堵站，分别发生极端暴雨时之雨量，进一步将极端暴雨量套配设计雨型，最后再搭配地貌型瞬时单位历线模式，以推估因发生极端暴雨事件而产生之洪峰流量。

First, considering the factor of unit gain space and the space limit, the common expression s of multiple views were selected out as the intermediate result, and the algorithm which was used to define the intermediate set was put forward. Then the algorithm of maintaining multiple views with this set was given. At last, the correctness and efficiency were given after the analysis and experiments.

首先，结合单位空间增益、空间限制等因素，选择多个物化视图的公共表达式作为中间结果，并提出了确定中间结果集的具体算法；其次，利用己计算出的中间结果集进行多个视图的维护，给出了具体的维护算法；最后，通过分析和实验证明了该算法正确且效率有显著提高。

In this paper, the Basin of Northwest Hebei Mountains as the study area, the combination of the remote sensing and GIS technologies will be applied, Firstly the objects of evaluation include forest land、. meadow 、 a part of orchard、 uncultured grass land、 sandlot、 bare land and the margin suitable and unsuitable farming land, the unit of evaluation is 30m*30m grid. Secondly, on the base of probling and building the spatial and attributive database of suitability evaluation through models such as digital elevation and inverse distance weighed interpolation, it establishs the factor system of suitability evaluation of forest land.

本论文以冀西北间山盆地区为研究区域，将地理信息系统与遥感技术相结合，确定了冀西北间山盆地区现有林地、部分园地、牧草地、部分未利用地以及边际适宜和不适宜的耕地为评价对象，以30*30栅格为评价单元，在借助数字高程、反距离加权插值等模型探讨并建立林地适宜性评价因子空间及属性数据库的基础上，对研究区的林地适宜性评价建立了该研究区评价指标体系。

For the first-order ordinary differential equation system, the coefficient matrix of variables with derivative is decomposed into the triangular factor form and transformed into unit matrix.

对于一阶常微分方程组，将具有导数变量的系数矩阵作三角化分解，使其简化成单位矩阵。

Another factor was the price reduction of the mobile telephone unit.

另一个因素是移动电话价格降低了。

Acousto-optic devices lure the fish, combined with the activities of fish characteristics and eating habits, through the imitation holographic fish biology signals, using the fish increasingly sound, phototaxis, a specific sound, light, wave as an enticement factor, achieve far deeper waters of the call to lure fish to stimulate and attract fish, swim to the phishing focus on the workplace and improve fishing anglers unit operating time, the amount of fish caught fishing with a high The economic value; this series of products, since the majority of sales have been very popular with fishermen, she was fishing people to like it.

诱鱼器是什么——美国声光诱鱼器，结合鱼的活动特点以及进食习性，通过模仿鱼类全息生物学信号，利用鱼的趋声、趋光性，以特定声、光、波作为引诱因素，实现对较远较深的水域鱼类的呼唤引诱，刺激并吸引鱼类集中游向捕钓工作地点，提高捕鱼钓鱼者单位作业时间的捕钓渔量，具有极高的经济价值；本系列产品，自销售以来一直很受广大钓友、捕鱼人的喜欢。

It is analyzing framework and factor by touch ElectroMagnetic Compatibility capability, premeditate essential project on pass high level testing of Electrical Fast Transient , synthesis material framework of power unit running restructure, it heighten capability criterion of EMC.

分析影响电磁兼容性能的结构与要点，预研出通过高等级的电快速瞬变脉冲群测试的基本型式，结合具体的功率单元结构进行更改，提高功率单元的EMC性能指标。

The model was simulated by Matlab. The control sequences of different flow proportionality factor with feedback gain were compared. Through comparing sample data, the result reveals that air traffic flow in the airspace unit has been improved.

利用Matlab对系统进行了仿真，对不同流动比例系数下得到的控制序列和反馈增益进行比较，通过采样数据的比较，得出的结果显示，空域单元的飞行流量得到改善。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。