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rectangle bar
相关语句
  矩形波板
     Measurement for Modulation Transfer Function of CCD Coupled with Fiber Optic Taper by Rectangle Bar
     矩形波板法测量光锥与CCD耦合器件的光学传递函数
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  相似匹配句对
     M-PARK BAR
     徜徉音乐公园
短句来源
     Research on the Stress Wrave of Long and Thin Bar of Rectangle Section
     矩形截面细长杆应力波的探讨
短句来源
     Book Bar
     书吧
短句来源
     Research on the Stress Wave of Long and Thin Bar of Rectangle Section
     针织用针针杆应力波的探讨
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     Embryo is small and rectangle.
     胚小,长方形。
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In this paper,with the micro—analysis method,the writer has studied the shearing stress produced on cross section when the axial rectangle bar of transform section is drawn and analysed the disperision law of shearing stress on cross section,On the basis of micromechnics equilibrant equation,the calculation formla of shearing stress on cross section has been reached.

本文用微体分析的方法研究了变截面矩形直杆在轴向拉伸时横截面上产生的剪应力.论证了剪应力在横截面上的分布规律.根据微体的力学平衡方程推导出了横截面上的剪应力计算公式.

Modulation transfer function (MTF) is a very important concept in the field of image processing.In this paper three practical methods for measuring the MTF of flash X ray radiographic screen film system is presented.These methods are based on pin hole,step wedge and rectangle bar/space pattern as stimuli.The MTF results obtained with these techniques are applied to calculate the boundary distortion of certain test objects,choose optimum radiographic geometry and perform restoration processing of the...

Modulation transfer function (MTF) is a very important concept in the field of image processing.In this paper three practical methods for measuring the MTF of flash X ray radiographic screen film system is presented.These methods are based on pin hole,step wedge and rectangle bar/space pattern as stimuli.The MTF results obtained with these techniques are applied to calculate the boundary distortion of certain test objects,choose optimum radiographic geometry and perform restoration processing of the blurred image.

本文叙述调制传递函数 ( MTF)的基本概念 .介绍了闪光 X射线辐射照相屏 -片记录系统的调制传递函数的常用测量方法 .我们分别用矩形波光栅、台阶楔、针孔作输入激励 ,测出了高能闪光 X射线照相系统的调制传递函数 ,并对测量结果进行分析对比 .这些实测的MTF对成象系统成象性能的定量认识、照相条件的最佳选择、照相图象的事前预估、模糊图象的事后处理都有很重要的实用价值

By a new half-solid plastic polymer binder and a multi-low molecule mixed solvent with rapidly solvent debinding and subsequent thermal debinding and sintering, three kinds of samples with good properties, the standard tensile bars, the rectangle bars for testing impact toughness and the tungsten alloy penetrator bars were prepared. The microstructure and properties of the samples were tested. The results show that the mechanical properties of the tensile bars, the rectangle bars...

By a new half-solid plastic polymer binder and a multi-low molecule mixed solvent with rapidly solvent debinding and subsequent thermal debinding and sintering, three kinds of samples with good properties, the standard tensile bars, the rectangle bars for testing impact toughness and the tungsten alloy penetrator bars were prepared. The microstructure and properties of the samples were tested. The results show that the mechanical properties of the tensile bars, the rectangle bars and the penetrator bars prepared by using injection molding have better properties than those of by traditional P/M method. The tensile and impact fracture characteristic contains mainly fracture cracks cutting through spherical tungsten grains. However,for the thicker cross-sections penertrator,the plastic polymer is very difficult to remove completely,after debinding and sintering,a small amount of inclusion still exist on the boundaries. In comparison with the standard tensile bars and rectangle bars,the tensile and impact fracture surfaces of the penetrator bars have more fracture cracks along tungsten-tungsten grains and tungsten-binder grain boundaries,which lead to the decrease of tensile properties and impact toughness. Sintering temperature has also great influences on fracture characteristic and properties.

采用一种新型半固态塑料体系粘结剂和多组元低分子混合溶剂进行快速溶剂脱脂、热脱脂、烧结,制备了性能较高的拉伸试样、冲击韧性试样和钨棒弹芯材料。测试了拉伸试样、冲击韧性试样及弹芯材料的显微组织与性能,研究了显微组织结构特征对其力学性能的影响。研究结果表明,注射成形弹芯材料的力学性能都优于传统方法制备的弹芯材料的力学性能,其拉伸断口和冲击断口均呈现大量的钨晶粒穿晶解理断裂;与标准拉伸样和冲击样相比,弹芯厚度较大的试样,完全脱除粘结剂很困难,试样中仍存在少量残留杂质,这些杂质大部分存在于晶界,使其冲击断口和拉伸断口上呈现较多的钨晶粒沿晶断裂,导致弹芯材料合金性能降低;烧结温度对断口形貌和力学性能也有较大影响。

 
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