山东新石器时代环境考古信息及其与文化的关系

本文通过对鲁中南山前平原西部９处史前文化遗址动植物遗存的综合分析,获得了有价值的史前环境信息。作者还根据史前遗址的分布复原了史前海岸线与鲁西地貌;介绍了对胶东半岛贝丘软体动物的研究状况;并对上述史前环境信息与文化的关系作了探讨。     

从《易经》看中国先秦旅游──兼谈对当今旅游业的启示

《易经》是中国最早记载旅行活动的文献之一。它体现了先秦人们对旅行的重视,也反映了先秦时期人们旅行的丰富内容,还记载了当时人们旅行的方式和环境。对我们今天的旅游事业有三个方面的启示。     

始终不渝地坚持和发展中国特色社会主义

旗帜问题至关重要,道路问题事关全局。在当代中国,只有中国特色社会主义才能发展中国,才能实现现代化,实现中华民族的伟大复兴。坚持中国特色社会主义道路,就是坚持社会主义。坚持中国特色社会主义理论体系,就是坚持马克思主义。     

河南济源出土的几件釉陶俑

2003年5月,为配合济源市沁北电厂西窑头工地的施工,由河南省文物考古研究所和济源市文物工作队联合对该工地进行了发掘,其中M10出土了一批精美的汉代釉陶俑。现择要介绍如下。     

我国内地旅游网站的可用性研究——基于对海口市网民的调查

目前国内很多针对旅游网站的研究大多是关注旅游网站的功能,网站可用性方面的研究很大程度上被忽视了。本文对此进行了探索性研究：通过采用修正的启发式评价方法,定义了用户对网站评价的基准,对489份基于5大类24个指标的调查问卷进行了分析和讨论,发现了我国内地旅游网站在可用性如内容服务形式、整体结构设计等方面存在的问题,同时给出了解决这些问题的建议和措施。     

简论中日诗歌特质的差异性--以《诗经》与《万叶集》为中心

中日文学特质的差异是灼然显在的,本文追本溯源,通过对《诗经》和《万叶集》的分析比较,探讨了中日文学在诗歌的社会道德功能、咏歌爱情与自然等方面所表现的差异性及其所自。     

Stable isotopic analysis of human bones from Jiahu site,Henan, China: implications for the transition to agriculture

We have investigated change in subsistence during the transition to agriculture in the site of Jiahu, Henan Province, China, using stable isotopic analysis of collagen and apatite in human bones. Millet agriculture is well documented at drier high latitudes of the Yellow River Valley, while rice agriculture predominated at wetter lower latitudes of the Yangtze Valley region. The early Neolithic site of Jiahu lies near the boundary between the drier north and wetter south. Archaeobotanical evidence shows that rice was a significant component of diet at Jiahu, but its δ¹³C value is similar to that of other foods, and therefore cannot be conclusively identified by carbon isotope analysis. Foxtail and broomcorn millets are the only C₄ crops known for the Chinese Neolithic. Because of their high δ¹³C values, their consumption can be evaluated by stable carbon isotope analysis of human bone. Collagen reflects mainly the δ¹³C value of dietary protein, and apatite accurately records that of the whole diet. Isotopic analysis of 15 well-preserved samples from three periods shows that collagen δ¹³C values were very low for almost all individuals, suggesting C₃-based foods dominated their diets. However, apatite carbonate δ¹³C values and δ¹³C spacing between collagen and apatite (Δ¹³C_ap-co) indicate that millet may have been a minor component of the diet in this region. Individuals, who consumed the smallest amounts of animal protein, as indicated by low δ¹⁵N, generally had the highest apatite δ¹³C values. Archaeobotanical evidence for millet at Jiahu is needed to support this interpretation.     

试论文学的人民性

人民性是文学实际存在的一种社会属性。“文学的人民性”这个特定概念是用来说明文学与人民群众的关系的。从这个概念质的规定性以及文学的社会功能来看，它的生命力应该是永存的，它的意义应该得到充分肯定。     

IBEM for Impedance Functions of an Embedded Strip Foundation in a Multi-Layered Transversely Isotropic Half-Space

An indirect boundary element method (IBEM) is developed to study the dynamic impedance functions (stiffness coefficients) of a rigid strip foundation embedded in a multi-layered viscoelastic transversely isotropic (TI) half-space. The proposed IBEM using half-space Green’s functions of distributed loads as fundamental solutions have the merits of fictitious loads being directly applied on the real boundaries without the problem of singularity and of the discretization effort restricted to local boundaries. In addition, the accuracy of the proposed method is not affected by the thickness of the discrete TI layers, as the exact dynamic stiffness matrix is employed. The presented algorithm is verified via comparisons with published results for the isotropic medium. By taking a rigid strip foundation embedded in a homogeneous half-space, a single-layered half-space, and a multi-layered half-space as examples, the effects of material anisotropy, frequency of excitation, and soil layer on the impedance functions are studied in detail. Numerical results show that impedance functions for the TI medium can be significantly different from those of the isotropic case. The variation of TI parameters alters the dynamic characteristics of the TI layered site, which in turn alters the dynamic interaction between the soil and foundation. In addition, the soil sedimentary sequence also has a remarkable influence on the impedance functions.     

Displacement Ductility Limits for Pile Foundations in Cohesionless Soils

The displacement ductility limit for seismic design of concrete piles is determined for the range of cohesionless soils expected in practice. The curvature ductility capacity associated with specified performance limit states, namely, the “serviceability” and “damage-control” limits, is determined based on the current provisions for confining steel. An analytical model is applied to assess the displacement ductility factor at the specified curvature ductility level. The investigated parameters include the soil stiffness, pile diameter, longitudinal reinforcement ratio, axial force level, and pile above-ground height. A set of design displacement ductility factors is recommended and verified to ensure the satisfactory seismic performance.