Modeling fluid flow in a heterogeneous, fault-controlled hydrothermal system

Previous studies have shown that most hydrothermal systems discharging at the land surface are associated with faulting, and that the location, temperature and rate of discharge of these systems are controlled by the geometry and style of the controlling fault(s). Unfortunately, the transport of heat and fluid in fault-controlled hydrothermal systems is difficult to model realistically; although heterogeneity and anisotropy are assumed to place important controls on flow in faults, few data or observations are available to constrain the distribution of hydraulic properties within active faults. Here, analytical and numerical models are combined with geostatistical models of spatially varying hydraulic properties to model the flow of heat and fluid in the Borax Lake fault of south-east Oregon, USA. A geometric mean permeability within the fault of 7 × 10⁻¹⁴ m² with 2× vertical/horizontal anisotropy in correlation length scale is shown to give the closest match to field observations. Furthermore, the simulations demonstrate that continuity of flow paths is an important factor in reproducing the observed behavior. In addition to providing some insight into possible spatial distributions of hydraulic properties at the Borax Lake site, the study highlights one potential avenue for integrating field observations with simulation results in order to gain greater understanding of fluid flow in faults and fault-controlled hydrothermal and petroleum reservoirs.     

一个展览和一个时代——“明永乐宣德文物特展”设计综述

"明永乐宣德文物特展"是一个全面展现明早期艺术的综合性文物大展。展览的最终目的是要激发大众对传统艺术的兴趣,令其得到文化的熏陶与艺术的启迪,因此,展览陈列设计所要考虑的是一个多层次的体系。首先提炼装饰元素作为视觉主题,将艺术品的美感尽可能展现给观众,同时还要向观者传递时代背景、皇帝的思想境界等信息。此外,设计者还精心挑选不同的装饰材料以营造新颖的展示环境,达到衬托文物高超工艺水平的目的。     

Projectile points,people, and Plains Paleoindian perambulations

Archaeologists generally agree that Paleoindian residential groups moved regularly over extremely large ranges. However, on the Great Plains, this argument depends substantially on datasets derived largely or entirely from projectile points rather than from systematic analysis of a wide range of artifacts. This paper argues that projectile points differ from most Paleoindian tools in ways that make such datasets unlikely to be reliable sources of information on range sizes. Furthermore, evidence from Paleoindian tool caches and the condition of discarded points suggest strongly that the raw material used to produce projectile points at least sometimes moved across the Plains independently of material used to make most other kinds of flaked stone tools. This, in turn, implies that not all stone used during Paleoindian times was procured by visits of whole residential groups to raw material sources, raising serious questions about the validity of widespread views of Paleoindian mobility.     

东魏北齐时期邯郸县设治考——以《窦奉高墓志》为中心

前人对东魏北齐时期邯郸县设治问题的研究存在两种截然相反的观点——"撤治说"和"设治说"。河北省磁县出土的《窦奉高墓志》记载窦氏在北齐时期被授予"邯郸县伯"的爵位,为"设治说"提供了有力证据。     

Opacifiers in Late Bronze Age glasses: the use of ToF-SIMS to identify raw ingredients and production techniques

Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS) is applied to the study of four samples of opaque glass of Late Bronze Age date. The technique is uniquely capable of identifying compositional heterogeneity at a sub-micron resolution within the crystalline opacifiers dispersed through homogeneous glass matrices. It is shown that this provides crucial information on the possible raw ingredients of the opacifying inclusions used, and has the potential for highlighting regional variations in the production technology involved in creating different colours of opaque glass.     

唐代“登州海行入高丽道”的变迁与赤山法华院的形成

“登州海行入高丽道”是唐代重要的海上航道。但在不同时期,其主要航线也不尽相同。大致说来,前期主要从登州北部的蓬莱、黄县境内的出海口出发,沿着贾耽所记述的“登州海行入高丽道”的航线航行;后期则主要从登州南部的牟平、文登县境内的出海口出发,横渡黄海,直抵韩半岛。正是在登州通往朝鲜半岛主要航线变迁南移的形势下,赤山浦以其优越的地理位置和交通条件,成为新罗商人张保皋首选的在唐贸易最重要的联络地和中转站,并在这里修建了一座法华寺院。     

改革开放以来我国家庭的变迁与发展

改革开放给中国的家庭带来了巨大的变化,家庭从其结构、规模等各个方面发生了不同程度的变迁。正确看待家庭在整个社会变迁中的发展,不但有利于国家的安定、枉会的进步以及经济、文化的发展,而且有利于推动家庭沿着富裕、健康、和谐的方向发展。     

汉刻重宝——建初买地摩崖

绍兴富盛跳山东汉建初买地摩崖是现存浙江境内有确切纪年的汉代摩崖,也是我国现存最早体积最大的买地券,被列为我国的汉刻重宝。通过追溯摩崖发现经过和结合相关史料,凸显此摩崖在金石学、社会政治经济学和书法艺术上的价值和地位。     

发展中的江苏省世界文化遗产保护事业

苏州古典园林和南京明孝陵被列入世界文化遗产名录,这两处世界文化遗产的保护,由以传统方式的文物保存上升到对世界文化遗产的科学管理和保护。