词频和运动流畅性对学习判断的影响:多线索整合的视角

本研究探讨基于经验的运动流畅性和基于理论的词频对学习判断的影响以及二者可能存在的相互作用,探讨非分析性加工和分析性加工在元认知监测中的作用模式。结果显示:(1)运动流畅性和词频均会影响JOL;(2)运动流畅性对JOL的影响会因为词频的变化而改变,而在认知负荷条件下,词频对JOL的影响还会因为运动流畅性的变化而不同。研究结果支持JOL中的运动流畅性效应与词频效应,也表明分析性和非分析性加工在JOL中会共同发挥作用。

风险决策任务中时间距离对框架效应的影响

通过考察中国大学生时间距离的认知相关性,并进而探讨时间距离对风险决策任务加工方式及框架效应的影响。实验一通过问卷调查发现,与发生时间相对较远的事件相比,相对较近的事件,其认知相关性更大,验证了时间距离的认知相关性假设。在此基础上,以时间距离为自变量,设计不同的风险决策任务,考察框架效应发生的可能性(实验二、实验三)。结果显示,时间距离近时,框架效应不明显;时间距离远时,框架效应明显。其原因是,发生在相对不远的将来事件引起分析加工模式,导致框架效应的减弱;发生在相对远的将来事件引起整体加工模式,导致框架效应的增强。

汉语二语学习者双字词加工方式研究

本研究在整体性加工和分析性加工的框架下,采用词汇判断任务,以汉语母语者作为参照,考察笔画数对汉语二语学习者双字词加工的影响,探究不同语言水平的汉语二语学习者视觉词的加工方式。研究发现,识别相同的词,汉语母语者没有出现笔画数效应,而母语为拼音文字语言的汉语二语学习者则出现了显著的笔画数效应,但该效应会随汉语水平提高而减弱。这说明母语者更常采用整体性加工,而二语学习者倾向于采用分析性加工这种相对低效的加工方式。随着语言水平的提高,二语学习者对分析性加工的依赖程度会降低,整体性加工水平提高,识词效率更高,但高水平二语学习者仍没有实现从分析性加工向整体性加工的转变。

Improving Refinery Profits via Fine Management of Hydrogen Networks

Hydrogen network management is important to refineries. Various systematic management techniques have been developed to improve the efficiency of refinery hydrogen networks. However, existing methods all treat the hydrogen network separately. The tradeoff between hydrogen network cost and oil processing network benefit has not been explored in the hydrogen network management yet. A novel sensitivity analysis scheme is presented to take oil processing network into consideration. Oil processing unit which is sensitive to both oil processing networks and hydrogen networks is identified first. Then, sensitivity analysis of the unit around the operating point of oil processing networks and hydrogen networks is carried out. Finally, the overall optimal operating condition is obtained. An example of a real Chinese refinery demonstrates the effectiveness of the proposed analysis method.

Alunite processing method selection using the AHP and TOPSIS approaches under fuzzy environment

Alunite is the most important non bauxite resource for alumina. Various methods have been proposed and patented for processing alunite, but none has been performed at industrial scale and no technical,operational and economic data is available to evaluate methods. In addition, selecting the right approach for alunite beneficiation, requires introducing a wide range of criteria and careful analysis of alternatives.In this research, after studying the existing processes, 13 methods were considered and evaluated by 14 technical, economic and environmental analyzing criteria. Due to multiplicity of processing methods and attributes, in this paper, Multi Attribute Decision Making methods were employed to examine the appropriateness of choices. The Delphi Analytical Hierarchy Process(DAHP) was used for weighting selection criteria and Fuzzy TOPSIS approach was used to determine the most profitable candidates. Among 13 studied methods, Spanish, Svoronos and Hazan methods were respectively recognized to be the best choices.

Model Test and Numerical Analysis on Long-Term Mechanical Properties of Stepped Reinforced Retaining Wall

Model tests and numerical analyses of stepped reinforced retaining wall were performed to investigate the effects of rheology of backfill and creep of geogrids on the long-term performance of the structure.The geogrid tensions,soil pressures,wall deformations and foundation pressure were measured during model construction and loading.A visco-elasto-plastic model and an empirical nonlinear visco-elastic model were utilized to simulate the stresses and deformations of geogrid-reinforced earth-retaining wall under long-term loads.By comparing test data with numerical results,it is shown that the foundation pressure distribution is nonlinear,and the lateral constraint of geogrids for backfill can cause a redistribution of foundation pressure.The curve of soil pressure is outside convex at each step initially,and it is close to the distribution for the case of vertical wall subsequently.The variation trend of geogrid tensions at different heights is obtained.Moreover,the failure mechanism and development mode of potential slip surface in retaining wall are proposed.

A new method for the stability analysis of geosynthetic-reinforced slopes

This paper is concerned with the stability analysis of reinforced slopes.A new approach based on the limit equilibrium principle is proposed to evaluate the stability of the reinforced slopes.The effect of reinforcement is modeled as an equivalent restoring force acting the bottom of the slice and added into the general limit equilibrium(GLE) method.The equations of force and moment equilibrium of the slice are derived and corresponding iterative solution methods are provided.The new method can satisfy both the force and the moment equilibrium and be applicable to the critical failure surface of arbitrary form.Furthermore,the results predicted by the proposed method are compared with the calculation examples of other researchers and the centrifuge model test results to validate its correctness and effectiveness.