STRAIGHTNESS

作品数：17被引量：35H指数：3
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相关领域：金属学及工艺更多>>
相关期刊：《Journal of Forestry Research》《Modern Instrumentation》《Transactions of Nonferrous Metals Society of China》《Science China(Technological Sciences)》更多>>
相关基金：国家自然科学基金国家重点基础研究发展计划中国博士后科学基金山西省自然科学基金更多>>
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Measuring tree stem diameters and straightness with depth-image computer vision
《Journal of Forestry Research》2023年第5期1395-1405,共11页Hoang Tran Keith Woeste Bowen Li Akshat Verma Guofan Shao 
funded in part by the United States Department of Agriculture Forest Service,Northern Research Station,USDA Hardwood Tree Improvement and Regeneration Center;USDA National Institute of Food and Agriculture McIntire Stennis project (IND011523MS)。
Current techniques of forest inventory rely on manual measurements and are slow and labor intensive.Recent developments in computer vision and depth sensing can produce accurate measurement data at significantly reduc...
关键词：Forest inventory Depth sensing Computer vision Tree diameter Stem straightness Trunk volume 
Virtual straightening of scraper conveyor based on the position and attitude solution of industrial robot model被引量：3
《International Journal of Coal Science & Technology》2021年第5期1149-1170,共22页Suhua Li Jiacheng Xie Fang Ren Xin Zhang Xuewen Wang Binbin Wang 
This research was supported by the Project funded by National Natural Science Foundation of China(Grant No.52004174);China Postdoctoral Science Foundation(No.2019M651081);the Key Research and Development Program of Shanxi(201903D121141);the Natural Science Foundation of Shanxi Province(201901D211022);the Scientific and Technological Innovation Programs of Higher Education Institutions in Shan Xi(No.2019L0305).
The movement of the floating connecting mechanism between a hydraulic support and scraper conveyor is space movement;thus,when the hydraulic support pushes the scraper conveyor,there is an error between the actual dis...
关键词：Virtual reality Scraper conveyor Hydraulic support Posture solution Straightness control 
Multi-point flexible straightening process by reciprocating bending for metal profiles被引量：2
《Transactions of Nonferrous Metals Society of China》2021年第7期2039-2050,共12页Xue-ying HUANG Jun ZHAO Gao-chao YU Qing-dang MENG Zhen-kai MU Yan-jun LIU 
financially supported by the National Natural Science Foundation of China(No.52005431);the National Natural Science Foundation of Hebei Province,China(No.E2020203086);the National Major Science and Technology Project of China(No.2018ZX04007002).
A multi-point flexible straightening process characterized by reciprocating bending is proposed.Specifically,the process is analyzed in terms of deformation mechanism and verified by numerical simulations and physical...
关键词：multi-point flexibility metal profile reciprocating bending curvature unification over-bending straightening STRAIGHTNESS 
Research on the Error Averaging Effect in A Rolling Guide Pair被引量：2
《Chinese Journal of Mechanical Engineering》2019年第4期104-115,共12页Yanbing Ni Haiyang Zhou Cuiyan Shao Jinhe Li 
Supported by National Science and Technology Major Project of China(Grant No.2015ZX04005001);Tianjin Provincial Nature Science Foundation of China(Grant No.16JCZDJC38400)
By studying the e ects of geometric precision on kinematic accuracy, an error mapping model has been established, based on the hypothesis that a motion pair and its installation surface are rigid. However, when using ...
关键词：ROLLING guide PAIR ERROR AVERAGING mechanism GUIDEWAY STRAIGHTNESS errors Precision design 
On-Machine Measurement of the Straightness and Tilt Errors of a Linear Slideway Using a New Four-Sensor Method被引量：3
《Chinese Journal of Mechanical Engineering》2019年第2期122-132,共11页Lei Zhao Kai Cheng Hui Ding Liang Zhao 
Supported by National Natural Science Foundation of China(Grant No.51435006)
Although there are some multi-sensor methods for measuring the straightness and tilt errors of a linear slideway, they need to be further improved in some aspects, such as suppressing measurement noise and reducing pr...
关键词：MULTI-SENSOR method STRAIGHTNESS ERROR TILT ERROR On-machine measurement LINEAR slideway ERROR separation technique 
The Straightness Backstroke Kick Makes Fast Speed and Increased Lactate Acid. A Case Study Using 3-Times Olympian被引量：4
《Journal of Sports Science》2017年第2期89-95,共7页Takahisa Ide William F. Johnson Yutaka Yoshimura Noriko Inada Sadafumi Takise 
In this study, we assess the effectiveness of utilizing a straight knee kick in the backstroke with regard to the overall time, max speed, and distance per stroke when using a straight knee butterfly technique. We ana...
关键词：Backstroke straightness kick lactate acid Olympian. 
Effect of Working Position on Vertical Motion Straightness of Open Hydrostatic Guideways in Grinding Machine被引量：5
《Chinese Journal of Mechanical Engineering》2017年第1期46-52,共7页ZHA JUn WANG Zhiwei XUE Fei CHEN Yaolong 
Supported by National Natural Science Foundation of China(Grant No.51275395);National Science and Technology Major Project of Ministry of Science and Technology of China(Grant No.2012ZX04002–091);the Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents,China(Grant No.2014RCJJ022)
Hydrostatic guideways have various applications in precision machine tools due to their high motion accuracy. The analysis of motion straightness in hydrostatic guideways is generally ignoring the external load on the...
关键词：open hydrostatic guideways error averaging vertical motion straightness working position 
High-precision method of detecting motion straightness based on plane mirror interference
《Journal of Beijing Institute of Technology》2015年第4期466-470,共5页邓勇军 张之敬 金鑫 许志尧 孙宏昌 
Supported by National Defense Basic Scientific Research Project(A222013);High Quality CNC Machine Tool and Basic Manufacturing Equipment Scientific Major Project(2012ZX04010-061)
A high-precision method of detecting motion straightness was proposed based on the prin- ciple of plane mirror interference after analyzing the motion straightness error of a linear stage. De- tection experiments were...
关键词：motion straightness plane mirror interference UNCERTAINTY HIGH-PRECISION 
Biological Effects in Heterotic Combination with Novel Adaxially-rolling Character in Rice(Oryza sativa L.)被引量：1
《Agricultural Science & Technology》2015年第11期2504-2508,2512,共6页龚晓平 况晓明 罗挺 李加胜 赵许兵 赵冰峰 曾胜 张致力 
Supported by Chongqing Major Scientific and Technological Project(6887);Science and Technology Key Project of Chongqing Science and Technology Committee(CSTC,2009AB1061)~~
Taking the heterotic combinations which respectively had moderately-rolled leaves and flat leaves at middle and later stages as tested materials, the biological effects in the heterotic combination of the moderately-r...
关键词：RICE Moderately rolling STRAIGHTNESS Photosynthetic rate Ught transmittance 
Geometric Approximation Searching Algorithm for Spatial Straightness Error Evaluation被引量：1
《Modern Instrumentation》2013年第1期1-6,共6页Jishun Li Xianqing Lei Yujun Xue Weimin Pan 
Considering the characteristics of spatial straightness error, this paper puts forward a kind of evaluation method of spatial straightness error using Geometric Approximation Searching Algorithm (GASA). According to t...
关键词：ERROR Evaluation Spatial STRAIGHTNESS GEOMETRIC APPROXIMATION SEARCHING Algorithm Minimum ZONE 
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