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参数. 图2 灵敏度系数图 Fig. 2 Diagram of sensitivity coefficients 2 仿真模拟研究 在上述热导率测量及估算方法的基础上建立数学模型,采用Fluent进行数值模拟得到温度场分布及监测点温度,根据测量方法的原理选取不同的热线半径,测点位置,加热功率及试样半径,得到不同参数对热导率结果的影响规律. 2.1 控制方程 采用焓-孔隙率方法来模拟...动力减小,监测点温度随着熔化时间发展趋势与较小半径(a=0.4 mm)温升趋势相比较为平缓. 图6 不同热线半径传热分析图 Fig. 6 Heat transfer analysis diagram with different hot-wire radius 对不同热线半径热导率估算结果如图7所示,与传统瞬态热线法不同,本研究选取高于相变温度某一温差段作为估算结果.从图7(a)可以看出:随着估......
Trans. Nonferrous Met. Soc. China 29(2019) 305-312 Sensitivity analysis on globularized fraction of α lamellae in titanium alloys Jiao LUO, Bo-zhe WANG, Lin-feng WANG, Lian LI, Miao-quan LI School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China Received 20 November 2017; accepted 11 April 2018 Abstract: The sensitivity analysis functions......
hypercube sampling; uncertainty analysis; sensitivity analysis 建筑冷热负荷预测是能源规划的重要环节,对能源系统的容量设计和部分负荷运行性能至关重要.在设计运行阶段,人们对建筑负荷预测研究较多,研究方法主要包括基于历史数据的外推法(包括统计回归法,时间序列分析法,机器学习法等)[1-4]和数值模拟预测法[5]等.在规划阶段,人们对建筑负荷预测的研.... 5 Sensitivity analysis of CSR 图6 单位面积峰值冷负荷TGP敏感性分析 Fig. 6 TGP sensitivity analysis of peak cooling load per unit area 太阳得热系数对单位面积峰值冷负荷的影响最大,而对单位面积峰值热负荷的影响最小,外窗传热系数却与之截然相反.而建筑层数,建筑底面长宽比,南向窗墙比和北向窗墙比对单......
was combined with its sensitivity analysis to deduce their function formulas on mechanical parts whose probability distributions of random parameters were of arbitrary shape. The two-objective... algorithm; reliability design; sensitivity analysis; structure optimization 对于高负荷作业的机械零件如盾构机行星减速器的轴,其结构的优化务必满足可靠性与稳健性的双重要求,以确保设计出的产品既安全又经济[1-2],为此,必须提供一种可以提高产品可靠性的工程可靠性稳健设计方法.针对实际工程中很难确定极限状态函数的显性表达式,随机有限元法的......
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. The sensitivity analysis was also performed to determine the most effective input parameters on SAG mill power. The sensitivity analysis of the GANN model shows that the work index, inlet water...; sensitivity analysis; artificial neural network; genetic algorithm Cite this article as: Hoseinian Fatemeh Sadat, Abdollahzadeh Aliakbar, Rezai Bahram. Semi-autogenous mill power prediction by a hybrid neural......
Trans. Nonferrous Met. Soc. China 26(2016) 2276-2282 Grain structure effect on quench sensitivity of Al-Zn-Mg-Cu-Cr alloy Cheng-bo LI1,2,3, Su-qi HAN1,2,4, Sheng-dan LIU1,2,4, Yun-lai DENG1,2,4, Xin... on quench sensitivity of an Al-Zn-Mg-Cu-Cr alloy was investigated by hardness testing, optical microscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy and scanning......
to concrete filled steel tubes (CFST) column stiffness were studied by using improved sensitivity analysis method. The stiffness matrix of flexible beam column element was deduced. The calculation model of the moment-rotation curve of the joints was simplified and used to deduce the semi-rigid composite frame. The results show that the improved sensitivity analysis method is more accurate......
strength formula. The Poor orthogonal analysis method was adopted to analyze the sensitivity of impact factors, and also the relationship between the main influencing factors and pillar safety... is validated through field test, which provides reference for the design of reasonable pillar width in deep mining. Key words: deep mining; pillars stability; sensitivity analysis; orthogonal experiment 随着采矿技术的发......
nanosheets exhibits a stronger response toward 100×10-6 (volume fraction) ethanol, its sensitivity at 300 °C is 17.50, and its optimal operating temperature (300 °C) is lower than that of the pure ZnO (330 °C). The obvious sensitivity (about 2.5) can be observed at the volume fraction of ethanol as low as 5×10-6, while its the response time is only 2 s at 300 °C. Moreover, the Y-doped ZnO sensor has......