Origin of the regional stress field along the Liquine-Ofqui Fault Zone （LOFZ）, Southern Chilean Andes by means of FE Simulation

The Liquine-Ofqui Fault Zone （LOFZ） of southern Chilean Andes is one of the largest active strike-slip fault zones. There is an ongoing debate regarding the origin of the stress field along the LOFZ due to its complex geometry. This paper represents a study of the origins of the LOFZ regional stress field. Stress fields are calculated by finite element （FE） analysis. The two possible stress origins, i.e., oblique plate convergence and ridge collision/indenter tectonics of Chile ridge against Peru-Chile trench, have been emphasized in the present study. Three types of boundary conditions for the three particular models have been applied to calculate stress fields. Models are assumed to be elastic and plane stress condition. Modeling results are presented in terms of four parameters, i. e., orientation of maximum horizontal stress （σHmax）, displacement vector, strain distribution, and maximum shear stress （ τmax ） contour line within the model. The results of the first model with oblique plate convergence show inconsistency between the geometric shape of the LOFZ and the distribution of the four parameters. Although more realistic results are obtained from the second model with normal ridge collision, there are few coincident in the LOFZ geometry and regional stress field. The third model with normal and oblique ridge collision is reasonable in understanding the origin of stress field and geometrical condition in the lithosphere of the LOFZ.     

接吻鱼

<正>有读者来信,希望小编们推荐适合家养的观赏鱼,那就趁着本月的情人节主题推荐给大家一种很有意思的热带鱼——接吻鱼。接吻鱼又叫亲嘴鱼、吻鱼、吻嘴鱼、香吻鱼、接吻斗鱼等,属鲈形目、吻鲈科、钉嘴鱼属,体色为浅红色,以鱼喜相互"接吻"而闻名。实际上,同性鱼也有"接吻"动作,故一般认为接吻鱼的"接吻"并不是友情表示,也许是一种争斗。接吻鱼游动起来十分缓慢,显得仪态万千,是极具观赏性的热带鱼。因为鱼体微红带白好似初放的桃花,所以还有很多行家叫它桃花鱼。接吻鱼喜欢栖息于热带河流中,在原产地常被作为一种食用鱼。它对水质的要求不严,群居性不太明显,游动起来十分缓慢,显得雍容大方,具有迷人的魅力和观赏价值。     

跨地方饮食品牌重塑的理论模型与实证分析

采用结构方程模型,构建了基于原产地形象,在地消费文化,品牌知名度,感知质量,品牌忠诚度,购买意愿等6个概念的理论模型,以广州哈根达斯为例,探讨文化地理因素如何作用于哈根达斯在中国的跨地方品牌重塑.研究发现:① 哈根达斯借助品牌重塑已在中国广泛确立其高档冰激凌品牌定位,实现了品牌升级,价格成为品牌升级的表征;② 原产地形象,在地消费文化均显著正向影响品牌知名度及感知质量,进一步对品牌忠诚度及购买意愿产生积极影响;③ 哈根达斯的品牌知名度对品牌忠诚度的影响不显著,感知质量对购买意愿的影响不显著;④ 不同于购买频率低的消费者,购买频率高的消费者的感知质量不再受原产地形象和在地消费文化的影响.本研究有助于推进跨地方饮食文化生产理论的发展,也是对品牌重塑理论的补充,将促进饮食地理领域的国际对话.     

中国茶

中国是茶树的原产地,也是世界公认的茶的故乡,因此而形成了包括茶具、茶道和茶艺在内的博大精深的茶文化。