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The results of measurement of such electronic extensometer are instable and then more errors may be included. The first writer of this paper designs the two-side electronic extensometer, which also has two edges but it can be fastened on two symmetric sides of the tensile specimen.

最近四十年发展起来的各种电子引伸计在讯号放大及数据采集和处理方面有非常突出的优点，但大多数电子引伸计如单侧电子引伸计(图1)、光栅引伸计和视频引伸计都是测量拉伸试样单侧的变形[3]，笔者称它们为单侧电子引伸计。

The one-side electronic extensometer fastened on only one side of tensile specimen cannot eliminate the effect of bend of eccentric tension. The results of measurement of such electronic extensometer are instable and then more errors may be included.

目前，国内外使用的电子引伸计多数是测量拉伸试样单侧的变形，由于拉伸试样往往发生偏心拉伸，单侧测量的引伸计无法扣除偏心拉伸的影响，因而其测量结果极不稳定和产生比较大的误差。

In this paper, a specimen of the inverter system adopted a TMS320LF2407 DSP chip as its controller by using constant V/F control and space vector PWM technique is designed. Some key Problems are analyzed in theory and methods of them are put forward.

鉴于此，本文利用TMS320LF2407DSP作为控制芯片，采用恒压频比的控制方式和空间矢量调制策略研制了一台变频器的样机，并对一些关键的问题给予理论分析并提出实现的方法。

This is a specimen of the new fabric.

这是新布料的样品。

This indicates that, this peakis associated with the presence of δ-ferrite in the specimen.

这说明所观察到的内耗峰是由于试样中的δ铁素体的存在所引起。

The experiment makes clear, combine what consolidate can raise ferroconcrete bridge greatly to bear the weight of force and stiffness, test specimen has good ductility.

试验表明，组合加固可以大大提高钢筋混凝土梁的承载力和刚度，试件具有良好的延性。

It is found that, besides the delamination failure due to the interlaminar stresses, the main cause of the unduly-soon failure of the laminate lies in the fact that the strength of the delamination laminate is lower than that of the original laminate A method of modification is also given to allow for the edge-effect produced by using a specimen of finite width to measure ...

发现导致层合板过早破坏的原因，除了由于层间应力引起分层破坏外，主要是分层后的叠合铺层强度低于层合板强度；并给出了一般均衡对称的π/4层合板用有限宽试样测试拉伸强度时由于边界效应影响的修正方法。这是一种基于试验结果的经验方法。

The operation is to be repeated until each specimen has been subjected to 5 applications of the test flame.

燃烧试片底端5秒钟后再移开火焰5秒钟。

When a specimen of a thin material shrinks from the flame without igniting,the test results shall be deemed invalid and additional specimens shall be tested.

当一个薄材料样件在没有点燃的情况下遇火焰收缩时，应认为测试结果无效，应使用其他样件再次测试。

Test method is that fix the specimen to the position at which the tip of the test flame without any affects by breeze

试法是 将试样固定于本机不受吹动之火焰顶端，燃烧 15 秒，熄灭 15 秒，反复 5 次，试验后取下试样检视试样被焚率。

The Master of Science degree program in Economics features a curriculum that is flexibl...

在经济学理学硕士学位的课程计划的特点是灵活而全面的方法，在理论和应用课程培训工作。

This module is used for constructing and visualizing 3D models.

该模块是用于建设和可视化的三维模型。