calculating scale
- calculating scale的基本解释
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[经] 计算尺
- 更多网络例句与calculating scale相关的网络例句 [注:此内容来源于网络,仅供参考]
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For instance, in the direct 3-D CT image reconstruction, the calculating scale, the calculating complexity and freedom of parameters go far beyond the processing capability of array processor used in 2-D medical CT.
七十年代以来,CT技术已经有了长足的发展,医用CT的成功和普及以及工业CT技术的进展使无损检测手段发生了划时代的变化,开创了现代辐射成象技术的新阶段。
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If average values before or after catastrophe point when the pressure at both ends reduces exceed the threshold value, judging that there is leak and positioning: calculating approximate wavelet transformation coefficient of pressure data at both ends, initializing searching interval, calculating a signal time delay value corresponding to approximate wavelet transformation coefficient in the searching interval from maximal scale N; converting the time delay value under scale N to that under N-1 by geometric proportion relation; updating the searching interval, repeating above processes until the scale is 0 and positioning based on the time delay value.
若两端压力下降突变点前后的均值变化均超过阈值,判定有泄漏并进行定位:计算两端压力数据的近似小波变换系数,初始化搜索区间,从最大尺度N开始在搜索区间内计算对应近似小波变换系数的信号时延值,利用等比关系将尺度N下的时延估计值转换为N-1下时延估计值,以该值更新搜索区间,重复以上过程至尺度为0,以此时延估计值进行定位。
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The main research tasks and results are as follows:(1) Through comparing the stress intensity factor of compact tension specimen calculated by finite element software with the theoretical value, the feasibility of calculating fracture parameters of crack tip in ABAQUS software was verified.(2) The relationship between the elastic modulus of the material and research scale was studied based on deriving the cohesive stress theory and other relevant theories. And the elastic modulus of the material on meso-scale was determined.(3) Global model and sub-model of the finite element were built in th...e macro-scale, and stress-strain field nearby the crack tip was analyzed, and the results show that the detailed stress-strain in the crack tip could be obtained by using the sub-model technique.(4) In meso-scale, the crack growth model was also established by assuming the crack propagating along the grain boundary, and the detailed stress-strain field in the crack tip was obtained.(5) The effect of crack length on Von Mises stress, and maximum principal stress and strain was analyzed in meso-scale when equivalent KI equals 30MPa.m1/2. And the results show that except for crack tip area, the stress-strain distribution in whole specimen is not affected.
主要完成研究内容和取得成果如下:(1)利用有限元软件计算出紧凑拉伸试样的裂纹尖端应力强度因子KI值,其结果与理论值一致,从而验证了利用ABAQUS计算裂纹尖端相关断裂参量的可行性;(2)在研究内聚应力等相关理论的基础上,推导出了研究尺度与材料弹性模量的近似关系,并确定了介观尺度上的弹性模量;(3)在宏观尺度上建立了全局有限元计算模型和子模型,得到了裂纹尖端应力应变场分布,结果表明利用子模型技术获得比较准确的裂纹尖端应力应变场分布是可行的;(4)在介观尺度上利用平均晶粒尺度的方式建立了裂纹沿晶扩展模型,得到了裂纹尖端断裂过程区的微观应力应变场;(5)当应力强度因子为30MPa.m1/2时,分析了介观尺度上在裂纹沿晶扩展过程中裂纹长度对Mises应力、最大主应力和应变的影响,结果表明,裂纹扩展长度对试样整体应力应变分布影响不大,而对裂纹尖端区域有较大影响;(6)介。。。
- 更多网络解释与calculating scale相关的网络解释 [注:此内容来源于网络,仅供参考]
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calculating:计算的
calculating scale 计算尺 | calculating 计算的 | calculation based on demand factor 需用系数法
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large-scale sites:大型场地
landscape plantings, calculating water景观种植用水量的计算 | large-scale sites 大型场地 | layout and surveying 布局和测量
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landscape plantings, calculating water:景观种植用水量的计算
landscape planning strategies 景观规划对策 | landscape plantings, calculating water景观种植用水量的计算 | large-scale sites 大型场地