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Multi-color space threshold segmentation and self-learning k-NN algorithm for surge test EUT status
Jian HUANG,Gui-xiong LIU
《机械工程前沿(英文)》 2016年 第11卷 第3期 页码 311-315 doi: 10.1007/s11465-016-0376-z
The identification of targets varies in different surge tests. A multi-color space threshold segmentation and self-learning k-nearest neighbor algorithm (k-NN) for equipment under test status identification was proposed after using feature matching to identify equipment status had to train new patterns every time before testing. First, color space (L*a*b*, hue saturation lightness (HSL), hue saturation value (HSV)) to segment was selected according to the high luminance points ratio and white luminance points ratio of the image. Second, the unknown class sample Sr was classified by the k-NN algorithm with training set Tz according to the feature vector, which was formed from number of pixels, eccentricity ratio, compactness ratio, and Euler’s numbers. Last, while the classification confidence coefficient equaled k, made Sr as one sample of pre-training set Tz′. The training set Tz increased to Tz+1 by Tz′ if Tz′ was saturated. In nine series of illuminant, indicator light, screen, and disturbances samples (a total of 21600 frames), the algorithm had a 98.65% identification accuracy, also selected five groups of samples to enlarge the training set from T0 to T5 by itself.
关键词: multi-color space k-nearest neighbor algorithm (k-NN) self-learning surge test
《结构与土木工程前沿(英文)》 2021年 第15卷 第6期 页码 1301-1316 doi: 10.1007/s11709-021-0765-1
Experiment and surge analysis of centrifugal two-stage turbocharging system
HE Yituan, MA Chaochen
《机械工程前沿(英文)》 2008年 第3卷 第4期 页码 365-368 doi: 10.1007/s11465-008-0073-7
关键词: auto-modeling compressor Reynolds number characteristic standard condition
王晓玲,孙宜超,陈华鸿,杨丽美,孙蕊蕊
《中国工程科学》 2011年 第13卷 第12期 页码 56-62
为了提高风暴潮灾害应急处置能力,确保防潮安全,文章建立了耦合流体体积函数(VOF)法的三维非稳态水气两相流k-ε模型,采用等效糙率的方法处理城市密集建筑群,既考虑了其阻水作用,又考虑了其蓄水作用。针对天津市滨海新区海河与永定新河之间区域的风暴潮洪水演进数值模拟与分析,对100年一遇风暴潮洪水淹没情况进行分析,并对不同频率的风暴潮洪水的严重性进行了比较。结果表明,随着风暴潮发生频率的增加,风暴潮淹没范围逐渐减小,水深随着频率的增加是逐渐减少的,该研究为海堤安全管理、风暴潮灾害的快速科学评估提供了理论依据和技术支持。
Mechanical performance analysis and stiffness test of a new type of suspension bridge
《结构与土木工程前沿(英文)》 2021年 第15卷 第5期 页码 1160-1180 doi: 10.1007/s11709-021-0760-6
关键词: new type of suspension bridge stiffness test mechanical performance railway bridge space truss
Mixed mode properties of CNT reinforced composites using Arcan test rig
Jacob MUTHU
《结构与土木工程前沿(英文)》 2015年 第9卷 第4期 页码 397-404 doi: 10.1007/s11709-015-0321-y
Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell
Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN
《能源前沿(英文)》 2017年 第11卷 第3期 页码 326-333 doi: 10.1007/s11708-017-0489-z
关键词: polymer electrolyte membrane fuel cell accelerated life-time test load cycling test durability
《能源前沿(英文)》 2022年 第16卷 第6期 页码 1000-1016 doi: 10.1007/s11708-021-0746-z
关键词: inlet air temperature inlet guide vane (IGV) opening part-load equilibrium running line gas turbine (GT) efficiency surge margin (SM)
杨兴邦
《中国工程科学》 2000年 第2卷 第10期 页码 98-104
火箭橇试验滑轨是一种大型地面动态模拟试验设备,用于研究试验件在空中高速度、高加速度运行时所遇到的诸多技术问题,其技术核心是一百万分之一的轨道直线性相对精度。它要求具有稳定的滑轨基础、高直线度准直基准线和光滑平顺的钢轨作为基本条件,需要采用钢轨精密机械加工、钢轨焊接、焊缝超声波探伤、轨道张拉锚固锁定、轨道直线度调整等新工艺技术。我国已成功地建成世界上唯一的、钢轨经精密机械加工后再全程焊接的XB高精度火箭橇试验滑轨。文章论述了它的诞生背景、设计思路、技术方案、技术与建造特点以及应用展望,该滑轨直线度达到世界先进水平。
Application of metal magnetic memory test in failure analysis and safety evaluation of vessels
Yiliang ZHANG, Song YANG, Xuedong XU
《机械工程前沿(英文)》 2009年 第4卷 第1期 页码 40-48 doi: 10.1007/s11465-009-0003-3
关键词: Metal magnetic memory test (MMMT) nondestructive testing (NDT) residual stress propylene purifier ammonia vessel
Investigating the raveling test for full-depth reclamation
Robert HILL, Andrew BRAHAM
《结构与土木工程前沿(英文)》 2018年 第12卷 第2期 页码 222-226 doi: 10.1007/s11709-017-0423-9
Prediction of the shear wave velocity
Amoroso SARA
《结构与土木工程前沿(英文)》 2014年 第8卷 第1期 页码 83-92 doi: 10.1007/s11709-013-0234-6
关键词: horizontal stress index shear wave velocity flat dilatometer test cone penetration test
Huayang LEI, Yajie ZHANG, Yao HU, Yingnan LIU
《结构与土木工程前沿(英文)》 2021年 第15卷 第1期 页码 147-166 doi: 10.1007/s11709-020-0704-6
关键词: shield tunneling face stability transparent clay model test numerical simulation
Fault evolution-test dependency modeling for mechanical systems
Xiao-dong TAN,Jian-lu LUO,Qing LI,Bing LU,Jing QIU
《信息与电子工程前沿(英文)》 2015年 第16卷 第10期 页码 848-857 doi: 10.1631/FITEE.1500011
关键词: Mechanical systems Design for testability (DFT) Fault evolution-test dependency model (FETDM)
Li ZHOU, Yaojun GE
《结构与土木工程前沿(英文)》 2009年 第3卷 第1期 页码 67-72 doi: 10.1007/s11709-009-0007-4
关键词: vehicle-bridge system sectional mode vortex-excited resonance wind tunnel test mode shape correction
标题 作者 时间 类型 操作
Multi-color space threshold segmentation and self-learning k-NN algorithm for surge test EUT status
Jian HUANG,Gui-xiong LIU
期刊论文
Integrating storm surge modeling with traffic data analysis to evaluate the effectiveness of hurricane
期刊论文
Experiment and surge analysis of centrifugal two-stage turbocharging system
HE Yituan, MA Chaochen
期刊论文
Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell
Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN
期刊论文
Improvement of part-load performance of gas turbine by adjusting compressor inlet air temperature and IGV opening
期刊论文
Application of metal magnetic memory test in failure analysis and safety evaluation of vessels
Yiliang ZHANG, Song YANG, Xuedong XU
期刊论文
Model test and discrete element method simulation of shield tunneling face stability in transparent clay
Huayang LEI, Yajie ZHANG, Yao HU, Yingnan LIU
期刊论文
Fault evolution-test dependency modeling for mechanical systems
Xiao-dong TAN,Jian-lu LUO,Qing LI,Bing LU,Jing QIU
期刊论文