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福建省新生儿筛查中心参加台湾葡萄糖-6-磷酸脱氢酶室间质量评价分析 被引量:1
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作者 陈瑶 朱文斌 +3 位作者 周进福 赵红 苏跃青 王旌 《检验医学》 CAS 2014年第8期848-850,共3页
目的分析参加台湾葡萄糖-6-磷酸脱氢酶(G6PD)室间质量评价结果,以了解该项目的质控质量。方法收集2011-2012年参加台湾预防医学基金会组织的室间质量评价的单位中使用与福建省新生儿筛查中心相同实验方法的实验室(2011年14家、2012... 目的分析参加台湾葡萄糖-6-磷酸脱氢酶(G6PD)室间质量评价结果,以了解该项目的质控质量。方法收集2011-2012年参加台湾预防医学基金会组织的室间质量评价的单位中使用与福建省新生儿筛查中心相同实验方法的实验室(2011年14家、2012年18家)12个批次120个样本的测定结果,并对结果进行定量及定性的描述和分析。定量分析采用评价限法和Z比分数法,定性分析公式为该项目的可接受结果数/该项目总测定样本数×100%。结果评价限法分析显示12个批次中有11次结果可接受率〉80%;而Z比分数法分析12个批次结果可接受率均〉80%。定性分析显示可接受率为100%。结论定量分析评价中,Z比分数法即使在测量值较低浓度值样本的,也能有较好的评价能力,是评价限法的补充。 展开更多
关键词 葡萄糖-6-磷酸脱氢酶 评价限法 Z比分数 可接受率 室间质量评价
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Analysis and Comparison of Safety and Fatigue Comfort of Postal Bicycles Based on Finite Element Method and sEMG 被引量:5
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作者 项忠霞 李亚南 +1 位作者 田冠 常振元 《Transactions of Tianjin University》 EI CAS 2013年第4期272-278,共7页
The safety and the fatigue comfort were compared between a domestic and a Japanese postal bicycle. Firstly, the fatigue comfort of these two kinds of bicycles was evaluated by surface electromyographic signal (sEMG) e... The safety and the fatigue comfort were compared between a domestic and a Japanese postal bicycle. Firstly, the fatigue comfort of these two kinds of bicycles was evaluated by surface electromyographic signal (sEMG) experiment, in which human lower limb muscle groups were research objects, and the average EMG (AEMG) index and median frequency (MF) were chosen as the evaluation indexes. Secondly, the safety of these two kinds of bicycle frames was analyzed and compared by using the finite element analysis. The results show that the riding fatigue comfort of the Japanese postal bicycle is better, and the Japanese postal bicycle frame is more safe and reasonable although both the postal bicycles meet the requirement for strength. Finally, based on the above analysis, the frame structure and related parameters of the domestic postal bicycle were improved with reference to the Japanese postal bicycle and biomechanics theory. 展开更多
关键词 postal bicycle surface electromyogram signal evaluation index fatigue comfort finite element analysis
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Dynamic Performance Test and Estimation of Reinforcement Effect on a Workshop after Column-Cut Supported by Joist
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作者 陈志华 陆征然 +3 位作者 王小盾 张溯 田亚军 汤庆轩 《Transactions of Tianjin University》 EI CAS 2010年第3期216-222,共7页
The reinforcement effect of a reconstruction scheme for a steel factory building was investigated using finite element method and dynamic performance test. The workshop concerned is a portal frame structure with four ... The reinforcement effect of a reconstruction scheme for a steel factory building was investigated using finite element method and dynamic performance test. The workshop concerned is a portal frame structure with four spans and two slope roofs, of which ten columns need cutting for expanding span. The design and reconstruction project of column-cut supported by joist were introduced, which includes column reinforcement, connection rebuilding between brackets and crane beams, and the changing of rigid joint into hinge joint. The construction scheme was put forward in the light of the characteristics of the reinforcement and reconstruction. Spot test of dynamic performance on the workshop and comparison with theoretical analysis results show that the column-cut supported by joist design is effective and the reconstruction project is successful. 展开更多
关键词 steel factory building column-cut supported by joist dynamic test modal analysis finite element analysis
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Evaluation of mixed-mode stress intensity factors by extended finite element method 被引量:3
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作者 茹忠亮 赵洪波 尹顺德 《Journal of Central South University》 SCIE EI CAS 2013年第5期1420-1425,共6页
Extended finite element method (XFEM) implementation of the interaction integral methodology for evaluating the stress intensity factors (SIF) of the mixed-mode crack problem is presented. A discontinuous function... Extended finite element method (XFEM) implementation of the interaction integral methodology for evaluating the stress intensity factors (SIF) of the mixed-mode crack problem is presented. A discontinuous function and the near-tip asymptotic function are added to the classic finite element approximation to model the crack behavior. Two-state integral by the superposition of actual and auxiliary fields is derived to calculate the SIFs. Applications of the proposed technique to the inclined centre crack plate with inclined angle from 0° to 90° and slant edge crack plate with slant angle 45°, 67.5° and 90° are presented, and comparisons are made with closed form solutions. The results show that the proposed method is convenient, accurate and computationallv efficient. 展开更多
关键词 stress intensity factor (SIF) interaction integral method extended finite element method (XFEM)
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The HITCR-I:Evaluation on a free gait generation method for the hexapod robot on irregular terrain
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作者 张赫 Zhao Jie +1 位作者 Liu Yubin Chen Fu 《High Technology Letters》 EI CAS 2013年第4期406-412,共7页
The purpose of this paper is to present and evaluate a method of free gait generation for HITCRI,a hexapod walking robot.The HITCR-I is designed as a modularized structure of legs that is based upon a four-bar linkage... The purpose of this paper is to present and evaluate a method of free gait generation for HITCRI,a hexapod walking robot.The HITCR-I is designed as a modularized structure of legs that is based upon a four-bar linkage mechanism and with force sensors in the tip of legs,distributed hardware structure and a modular software structure of the control system.Based on a set of local rules between adjacent legs,finite state machine(FSM) model is built to control the coordination of legs.An automatic smooth transition of gait pattern is achieved through deriving the mathematical relation between gait pattern and locomotion parameters.The disordered inter-leg phase sequence is adjusted to a regular state smoothly and quickly by the local rules based FSM,and the gait pattern can transform automatically adapting to irregular terrain.The experiment on HITCR-I has demonstrated that it can walk through irregular terrain reliably and expeditiously with the free gait controller designed in this paper. 展开更多
关键词 ROBOTICS hexapod robot irregular terrain walking tree gait gait pattern transition
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Tensile Characteristics Evaluation of Corroded Reinforcing Bars Extracted from Actual Structures
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作者 Toshiyuki Kanakubo Michiaki Oyado 《Journal of Civil Engineering and Architecture》 2015年第12期1439-1451,共13页
The analysis used simple finite elements is performed to simulate the tensile behavior of corroded reinforcing bars extracted from three actual concrete structures. The cross-sectional area of the elements is set to h... The analysis used simple finite elements is performed to simulate the tensile behavior of corroded reinforcing bars extracted from three actual concrete structures. The cross-sectional area of the elements is set to have the actual distribution measured by 3D laser scanner system. The variable factor in the analysis is the length of the elements. The analysis results show that the length of the elements has a major influence on the deformation capacity after yielding. The calculated stress-strain curves, obtained using the elements with a length that is 2 times the bar diameter, are in good agreement with the tensile test results. The calculated stress-strain curves are modeled using a bi-linear model to facilitate the FEA (finite element analysis) of an overall concrete structure. From the analysis results, both the tensile and yield strengths decrease in proportion to the reduction of the minimum cross-sectional area of corroded bars. The ultimate strain has a remarkable decrement as the reduction of the minimum cross-sectional area. Formulas for determining these values are proposed as a function of the decrement ratio of the minimum cross-sectional area of a corroded bar. 展开更多
关键词 Corroded bar cross-sectional area distribution minimum cross-sectional area bi-linear model ultimate strain.
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