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There are a tens of flash orthographical shadow photograph points which are the main test equipments in the ballistic tange of the flight line.

实验表明,同一照相站两个火花闪光源内光的不同步时间约可在3μs,这给测量结果带来了不容忽视的误差。因而,改善正交闪光阴影照相的同步性能是十分重要的课题。

The Practical and New patent is to strack automatically the movement of the sun by a small sync unit using a mirror paraboloid and focus the sunsine on the surface of vacuum heat absorbing pipe, so as to heat the water in a single vacuum heat absorbing pipe with several times of energy,so that the water temperature rises till boils with heat exchange.

家用同步跟踪太阳能开水器是利用镜面抛物面在小型同步装置作用下自动跟踪太阳运动,以7倍于阳光直射的能量将阳光聚焦到真空吸热管的表面,对单根玻璃真空吸热管中的水进行加热,通过对流热交换,使容器中水温上升直至沸腾的太阳能开水器。

From the ideas of some economic models, the author establishes some non-linear coupled economic models about economic increase rates or competitive investments and so on, and analyzes the economic mechanisms of the models. Under the coupled structures, some results, such as, the steady states of economic increases, economic synchronal responses and synchronal control frequency responses, are obtained in this thesis.

从一些基本经济模型出发,借助于其建立模型的思路,建立了具有增长交联形式和投资竞争交联形式等的非线性交联模型,并研究了模型的经济机理,得到交联结构下经济增长的稳态、各部门经济同步响应以及在受控制下同步响应到控制频率等一些结果。

Permanent Magnet Synchronous Motor drived by triphase sinusoidal current is research object in this paper . Its mathematics models in several coordinate are set up , controlling principles of flux linkage and torque are discussed under DTC and the block diagram of PMSM with DTC is presented.

本文以三相正弦波驱动的永磁同步电机为研究对象,建立了其在不同坐标系下的数学模型,并深入探讨直接转矩控制中永磁同步电机的磁链和转矩的控制思想,给出控制方案。

The simple, easy and quick sensor-less control of position and speed has been attainted. At the same time, in order to overcome the shortcomings of low efficiency under high speed with flux-weakening, the control idea of boost under motor status and flux-strengthening under low speed status has been proposed from structure design and performance analysis by using the motor design and transient analysis software of ANSOFT.

同时为了克服永磁同步电机高速弱磁效率低的问题,借助于ANSOFT软件电机设计和瞬态分析工具,从结构设计以及性能分析方面提出了电动时升压和低速强磁控制相结合的控制思想,基本实现了永磁同步电机高速不需弱磁的大范围高效率的运行。

On the basis of cognition of the potential significance of welding arc spectrum dynamic characteristics and with the destination to find out new sensoring method of metal transfer,this paper provided the parasynchronous principle and in turn verified the relationship between the pulses in the waveform of arc spectrum signals and metal droplet transfer with para high speed photography apparatus.

基于对熔化极气体保护焊电弧光谱信号动态特征重要意义的认识,以发现新的熔滴过渡传感方法为目的,本文提出准同步高速摄影法,设计了准同步光谱信号-高速摄影检测装置,验证了光谱信号波形中的脉冲是熔滴过渡所为,它们之间存在着确定的对应关系。

A model of self-controlled synchronous motor (including double armature winding synchronous motor) is developed which takes account of damper winding according to its actual structure. The damper winding is represented by two sets of loop on each axis based on multi-loop method and bar currents may be calculated.

本文首先建立了包括参数计算在内的自控式同步电动机(包括双电枢绕组自控式同步电动机)的数学模型,该模型采用多回路法处理阻尼绕组,便于计算阻尼条的电流,可以比较准确地分析阻尼绕组对电机运行性能的影响。

Foshan Hengnai Industrial Belt co.,LTD is a company of self-production, marketing,enterprise industrial belt,with a first-class production technology, production of special specificationgs on the belt,especially AT20+APL series synchronous belt have rich experience.

佛山市恒耐工业皮带有限公司是一家集生产、加工、销售为一体的企业,拥有一流的生产技术及设备,对生产特殊规格的同步带,特别是聚氨酯陶瓷磨边机AT20+APL系列同步带有着丰富的经验。

Foshan Hengnai Industrial Belt co.,LTD is a company of self-production,marketing,enterprise industrial belt,with a first-class production technology,production of special specificationgs on the belt,especially AT20+APL series

佛山市恒耐工业皮带有限公司是一家集生产、加工、销售为一体的企业,拥有一流的生产技术及设备,对生产特殊规格的同步带,特别是聚氨酯陶瓷磨边机AT20+APL系列同步带有着丰富的经验。

For this reason, by means of leading in the concept of device clock error, the authors propose a new data synchronization method based on device clock error.

为此,文章通过引入装置时钟差的概念,提出了一种基于时钟差的数据同步方法,该方法以乒乓对时为基础、参考向量法对时作辅助,解决了自愈环网双向通道路由不一致时数据的同步问题,具有很好的实用价值。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。