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criterion for direct tensile condition. Key words: asphalt mixture; uniaxial tensile stress state; strength test; stiffness test; failure criterion 至2018年底,我国已通车高速公路14.25万km,居世界第1位,其中大部分为沥青路面结构.在荷载和环境的... by taking initial crack as failure criterion 表5中,强度σd和破坏应变ε的计算公式分别见式(1)和式(2)；劲度模量S和应变能ρ的计算式分别为: S=σd/ε (6) ......
the instability criteria of system was established to study the interaction between backfill and rock mass, and then the system instability criterion was deduced. The results show... a scientific basis for the rational strength design of backfill mine. Key words: cemented tailings backfill; rock mass; damage constitutive equation; catastrophe theory; match; instability criterion 1......
; 文献标志码:A 文章编号:1672-7207(2015)05-1909-06 Criterion relation of particles distribution for CJD nozzle AI Yuanfang1, SUN...: An experimental model of flash furnace with CJD nozzle was built, the criterion relation of particles distribution was studied, employing cold experimental methods such as receiving particles from air flow......
思路和手段. 关键词:道路工程；水泥混凝土路面；板角脱空；判定指标；板角弯沉中图分类号:U416.216 文献标识码:A 文章编号:1672-7207(2009)01-0248-08 Criterion... to estimate void scope beneath slab corner. Its criterion of judgment was the deflection in slab corner. By modifying the effect between slab planar dimension and load-transfer efficiency......
on information criterion (IC) and particle swarm optimization (PSO) is presented. In the proposed method, IC is applied to obtain the hidden layer structure by calculating the optimal IC value... are compared, and an implementation of the proposed ICPSO algorithm is given. The optimized neural network has one hidden layer with 261 nodes selected by Akaike’s information criterion (AIC......
of the influence factors matrix were established according to the AHP method. The evaluating grade was determined with credible degree recognition criterion, superior degrees were measured and finally... criterion 地下采矿方法的选择是地下金属矿床开采设计中最核心的内容[1-2],其选取的合理性直接关系到矿山企业的核心利益.传统的采矿方法选择仅仅是由单个影响因素或几个因素各自直观地评价而确定[3],选取的采矿方法具有很大的片面性和主观性.基于传统选择方法的不足,近年来,许多现代数学理论如灰色理论[4],神经网络[5],突变优选理论[6],多目标决策法[7],模糊数学理论[3]和遗传算法[8]等被应用于......
be satisfied. Key words: long span cable-stayed bridges; seismic damage; damage control; supporting piers energy dissipating; failure criterion 斜拉桥是一种具有很强竞争力的大跨度桥梁桥型.近年来,我国建成的大跨度斜拉桥主跨超过1 000 m,还有多处宏伟的越江,跨海......
with this problem, an improved joint method based on the discrete wavelet transform (DWT), modified energy ratio (MER) and Akaike information criterion (AIC) pickers, has been proposed in this study... and waveform adaptabilities. Key words: Akaike information criterion (AIC); modified energy ratio (MER); discrete wavelet transform (DWT); acoustic signals with noise Cite this article as: ZHOU Zi-long......
. Different from the FLD that varies with the strain path, the FLSD is not sensitive to the strain path. Therefore, FLSD is convenient as a forming limit criterion for multi-stage sheet forming. The influences of the material’s yield criteria on FLSD are also discussed by comparison of the Hill’s 48, Hill’s 79 and Hosford non-quadratic criterion. The impacts of material hardening laws (Voce and Swift......
independent factors on the hardening parameters. These models were introduced into finite-element code "Abaqus" to simulate tensile tests of welded joints. The relative average deviation criterion, between... and forging. Key words: friction stir welding; response surface methodology; face centered central composite design; hardening; simulation; relative average deviation criterion 1 Introduction Friction......
