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Now, we mostly discuss the direct athwart welding machine in this article. We will use the silicon semiconductor of IGBT to control the system. so there are a lot of advantages in the system.

而在此文中我们主要讨论的是逆变直流焊接机，同时这里应用了先进的IGBT可控硅半导体管来进行控制，所以它拥有软开关技术的诸多有点。

The key points of sensorless technology in PMBLDCM are to study a method which can detect rotor position accurately by simply method in whole speed range. After analyzing current sensorless methods of the PMBLDCM, it is found that those methods are successful at middle and high speed, but they often fail to detect rotor position at low speed when the back electromotive force is small or zero.

纵观目前的永磁无刷直流电机的无位置传感器控制方法，比较成熟而可行的方法多集中于电机在中高速区域运行时，能够较准确估计转子位置；电机处于低速、极低速、静止状态时电加热管，因为反电动势幅值较小或者为零，而无法正常工作。

However, most small and medium-sized manufacturing enterprises self-improving the layout of the warehouse there are still many problems, such as warehouse layout is irrational, and warehouse space utilization lower Cangguan Rapporteur of the quality is not high, and so on.

然而，我国大部分中小制造企业自营仓库的布局设计完善仍然存在着诸多问题，比如仓库布局不合理、仓库空间利用率较低、仓管员的素质不高，等等。

At present althoughhas many merchants the simple point to register Single Sign Onthe standard plan, but its may the implementation, the management, theusability, the security respectively have the characteristic, does nothave the versatility and the open request.

目前虽有多家厂商的单点登录Single Sign On标准方案，但其可实施性、管理性、易用性、安全性各有特点，不具备通用性和开放性的要求。

On August 28, RIA Novosti reported an escalation, a sign still more will follow - South Ossetian Interior Minister Mikhail Mindzayev stating that an unmanned Georgian reconnaissance plane was shot down over the capital, Tskhinvali at 20.10 GMT.

8月28日，俄罗斯规管影响评估报告的升级，一个迹象，仍然会有更多的后续-南奥塞梯内政部部长米哈伊尔m indzayev指出，格鲁吉亚一架无人驾驶侦察机被击落，超过资本，茨欣瓦利在1 0月2 0日格林尼治。

It sieves the box is board crossbeam riveting hitch welds built-up section By host vice- side bar Hollow beam Enters the material back plate Leaves material board Sieves board and so on composition The side bar selects the low-alloy pressure vessel steel plate The intensity is high The weldability is good Peripheral knee bend And in the vibration direction and along longitudinal connects themulti- roots angle steel Causes the side bar rigidity big enhancement Is advantageous to the intensity enhancement and noise reducing.

其筛箱为板梁铆焊组合结构，由主副侧板、管梁、入料挡板、出料板、筛板等组成，侧板选用低合金压力容器钢板，强度高、可焊性好，周边折弯，并在振动方向及沿纵向联接多根角钢，使侧板刚度大大增强，有利于强度的提高和噪音的降低。

Tying tube flies, and how to fish them make up the body of this book, but much of the flavor of this great read derives from the historical aspects and personal notes by the writers.

拴管苍蝇，如何弥补这些鱼体内此书但多展现这一伟大的历史方面看，来自债券及个人的作家。

With the development of the Hydropower Engineering, more and more large-scale underground reinforced concrete bifurcations have been applied.

随着水电事业的发展，越来越多的工程采用大型地下钢筋混凝土岔管结构。

To dte, t Valves he Institute reserchers he developed out of six series, more thn 60 specifictions of the jet pipe servo vlve, while the product filure rte from the originl more thn 30% to 3% or less.

迄今为止，该所科研人员已研发出了6个系列、60多个规格的射流管伺服阀，同时将产品故障率从原先的超过30%降到了3%以下。

The training squadron has increased its output of combat-ready aircrews, said Lt. Col. Micah Morgan, the squadron's director of operations.

训练中队增加了其产量，每年能够训练出更多的能够战斗的空勤人员了，中队军事行动长管Micah Morgan上校说。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。