爱环保还是爱流行? 时间参照的作用

目的:本研究试图探讨个体是如何根据时间参照的变化来权衡产品环保度和流行度的,从而揭示绿色消费究竟是环保驱动还是人际驱动。方法:实验1采用被试间设计,实验2采用混合设计。结果:实验1研究发现,低流行属性会严重降低近期购买情景下的产品评价,而高环保属性则能更好提升远期产品评价。这种心理偏好导致个体在近期购买情境下(相对于远期购买情境)对高环保-低流行产品评价更低(实验2)。结论:个体会策略性地在产品环保度和流行度间进行权衡,导致个体更倾向于在将来而不是现在实施绿色消费,从而出现绿色消费的不作为。

Use of Magnesium Oxide-cement Binder in Composites Based on Hemp Shives

In this paper, it presented the results of experimental study of utilization of MgO cement as calcium hydrate replacement in lightweight composites based on hemp shives. The results of selected characteristics （compressive strength and coefficient of thermal conductivity） of hardened composites show that MgO cement based on the milled caustic magnesite is suitable alternative in comparison to conventional binders used in hemp concrete. This material leads to new environmentally products as non-load bearing building materials.

考虑消费者环境偏好的闭环供应链奖惩与补贴机制研究

考虑消费者具有环境偏好差异,构建分散决策下无政府机制、基于产品环保度的奖惩机制、基于废品回收量的补贴机制以及基于奖惩与补贴双机制下的闭环供应链Stackelberg博弈模型,求解模型得出产品的零售价、回收价等决策变量。研究表明:当无政府介入市场时,采取不同闭环供应链战略的企业专注各自的细分市场,定价策略很大程度受消费者环境偏好影响。与无政府机制相比,奖惩与补贴双机制下主动回收的制造商利润增加,不回收的制造商利润减少,但产品环保总量和废品回收量增加,说明奖惩与补贴机制能有效引导制造商的回收积极性,并有利于整个环境的环保,同时,零售商与回收商利润的增加也促使他们积极地参与闭环供应链,从而使得整个闭环供应链得以协调。

Modeling of mechanical behaviors for natural fiber reinforced composites under hygrothermal ageing

In recent years,natural fiber reinforced composites have been widely applied to various industrial products for their excellent environmental-friendly performance.It is essential to understand the mechanical properties of natural fiber reinforced composites under their in-service environment.Compared with synthetic fibers,the hydrophilicity of natural fibers could result in a much larger quantity of water absorption from the moisture atmosphere,which would have adverse consequences for the durability of natural fiber reinforced composites[1].The environmental temperature would affect the