They need to inspect the metal for definitive signs of striation marks ( which would be consistent with chemical explosive, like Semtex, which they quickly discovered on the inside of the fuselage of Pan Am 103) and for the shape of the metal. 他们要检查金属是否有确切的波纹痕迹(波纹痕迹意味着化学品爆炸,如塞姆汀炸药,当年调查人员在泛美103航班的机身内部很快就发现了这种炸药)以及金属机身的形状。
Abstrac This paper presents a signal processor for realizing a group-asymmetrical PWM controller ( GAPWM), which is used to eliminate striation effect in a fluorescent lamp. 本论文提出讯号处理方法来实现群组非对称脉波宽调变控制器(GAPWM),主要目的在于消除荧光灯之辉纹及简化电路。
The presence of striation area is one of the main characteristic on the surface generated by abrasive jet. 摘要波纹区域的存在是磨料射流切割表面的主要特征之一。
Research on pre-processing method of metal fatigue striation in complex background 复杂背景下疲劳条带图像预处理方法研究
This is the important cause which explains why the macro-growth rate is greater than the micro-growth rate ( the striation spacing) even in the relatively low growth-rate range of fatigue crack. 这是导致它即使在相当低的宏观扩展速率范围内,dl/dN就大于S的重要原因。
The chief character of fracture is fatigue striation and dimple. 断口分析表明,合金低周疲劳断口的主要特征是平行的条纹及韧窝。
The fatigue stresses can be estimated with striation widths on fracture surface for Titanium alloys under experimental and service conditions. 对钛合金在实验和工程应用条件下的构件进行断口定量反推,研究疲劳条带间距反推疲劳应力在钛合金应用的可行性。
Inversion of the conjugate joints and striation is used to study orientation and timing of the tectonic stress field and define the stages of the field. 利用共轭节理和断层擦痕反演,对矿区构造应力场进行了定向、定时研究,确定了各期构造应力场。
The fatigue fracture characteristics were fatigue striation, ductile microvoid, and quasi-cleavage-like fracture characteristic. 疲劳断裂特征为疲劳条纹、韧窝及类似准解理状形貌特征。
In this paper, aim at students 'inaccurate judgment for isoclinal's interference in Michelson' experiment teaching, incorrect operation during isoclinal's interference ring's adjustment and the interference striation's extruding and sinking, such problems are analyzed and the treatment methods are also presented. 针对在迈克尔逊实验教学中学生对等倾干涉判断不准确、等倾干涉圆环的调节过程欠当和干涉条纹“冒出”与“陷入”的问题进行分析,提出了解决方案。
The discrete point cloud data sampling from the striation figure is common. 采样于线状图形的离散点云数据也是常见的。
Fracture analysis showed that accumulative damage under creep/ fatigue interaction made the fracture morphology changed from transgranular striation to intergranular mechanism which characterizes creep fracture. 断口分析表明,在疲劳&蠕变交互作用下的积累损伤使断口形貌由穿晶条纹机制变为以蠕变特征为主的沿晶机制。
The crack celerity expand to form the fatigue striation when puff part adequacy long in the positive stress. 当断面张开部分足够长时,在正向应力作用下发生快速扩展,微观形成疲劳辉纹。
Theory and method in determining the orientation of principal stress by fault striation 根据断层擦痕确定主应力方位的理论和方法
Carbon impurity concentration decreased from cell wall, vicinity of cell wall to denuded zone sequentially and striation distribution existed. 杂质碳在胞壁、近胞壁和完整区的含量依次降低,存在条纹分布。
A model of generation of striation based on the diffusion reaction of iron and oxygen was given. 提出了一种基于铁和氧气扩散反应进行的管材激光切割表面条纹形成模型。
The spectrum radiance in bright and dark region of striation discharge is studied experimentally. 实验研究了条纹放电的明条纹和暗条纹中汞原子的谱线强度。
Local unclear transverse striation of muscle fiber was seen in group C; C组可见局部横纹不清;
Investigation on the Procedure of Pipe Laser Cutting and the Model of Generation of Striation on Cut Surface 管材激光切割过程和条纹形成模型的研究
Moving striation in plasma and chaos emission of He-Ne lasers 等离子体的移动辉纹和He-Ne激光的混沌发射
And formation of typical fatigue striation on fatigue crack steady propagation is difficult. 其疲劳裂纹的稳定扩展也较难形成典型的疲劳条带。
Shape-reconstruction to discrete point cloud data sampling from the striation figure is one of important research contents of it. 针对采样于线状图形的离散点云数据的形状重建是其中的重要研究内容之一。
The striation spacing in heat affect zone and welded seam samples was wider than that in matrix sample, this shows that fatigue crack propagation resistance of heat affect zone and welded seam was smaller than that of matrix. 焊缝区和热影响区试样的辉纹间距较基体区的大,说明裂纹扩展速率快,焊缝和热影响区的抗裂纹扩展性较基体差。
Objective To introduce a method for examination of striation marks left by claw-hammer. 目的介绍羊角锤起钉槽撬压形成擦划痕迹的检验方法。
Aiming to the real working condition of the rubber striation roll press, this paper analyses the geometry deformation of striation groove in pressing stress, which is useful for the further studying of the striation press dehydration. 针对胶制沟纹压榨辊实际压榨情况,分析了在压榨压力作用下沟纹槽的几何变形情况,对进一步研究沟纹压榨脱水有一定的借鉴。
And with Sobel edge detection, Skeleton Extraction, Hough Transformation another method is proposed on the recognition for needle like or striation texture ingredient. The experimental results show that the methods proposed in this paper are efficient. 并提出了一种采用Sobel变换、骨架提取以及Hough变换相结合的技术进行针板状纹理成分识别的方法,实验结果表明,该方法是有效的。
The constitutional supercooling and internal growth striation in the SNLN crystals have been overcome and the optical homogeneity of the crystals have been improved by employing optimum growth condition and technique. 采用最佳的生长和工艺条件克服了铌酸锶钠锂晶体的组分过冷和内部生长条纹,提高了晶体的光学均匀性。
Crack growth area mainly has the fatigue striation, with secondary cracks, torn edges, quasi-cleavage fracture. 裂纹扩展区主要为疲劳条带并存在明显的二次裂纹、撕裂棱、准解理面。
Fracture image segmentation and determination of striation region are the precondition in the measure of fatigue striation period. 对疲劳断口图像进行分割,确定疲劳条带周期测量区域是疲劳条带周期测量的前提。