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41.
西非萨赫勒地带荒漠化和人地关系地域系统分析 总被引：1，自引：0，他引：1
西非萨赫勒地带是世界最严重的荒漠化地区,国际社会对这里荒漠化问题的关注最终发展成为世界范围内大规模的防治荒漠化运动。本文提出了萨赫勒地带荒漠化四个机制模式,并分析了当人地关系地域系统的组成,系统内各要素之间的相互作用及其特征,并在此基础上阐述了该地带荒摸化的实质。 相似文献
42.
木材树种的鉴定是古木结构建筑维修和保护的基础性工作。为配合建水县指林寺大殿修缮保护的需要,为修缮树种选用提供依据,了解木文化的特点。本研究对建水指林寺大殿古建筑主要木构件进行了树种鉴定及对材种配置调查分析。采用切片、显微镜拍照、宏观和微观特征分析等方法,对700个试样进行了树种鉴定。结果表明建水指林寺大殿的木构件共有4个树种,分别是硬木松(Pinus sp.)、白青冈(Cyclobalanopsis sp.)、格木(Erythrophleum sp.)和荷木(Schima sp.)。通过材种配置分析可得指林寺大殿木构件在选材方面达到很高水平,不仅反应了建造年代,而且体现修缮的特性。 相似文献
43.
绪论
就行业习语而言,人文收藏在各个不同的时代有不同的叫法。从历史上的沿袭来看,大致有古玩、骨董、古物、文物等不同的习惯用语并沿用至今。严格地说,这些习语并不是一个等同的概念,因为其内涵与外延都不尽相同。 相似文献
44.
本文以枣庄市作为组群式城市的代表,在深入调查分析的基础上,着重探讨了枣庄市农业人口转化的结构特征及其形成原因,以期对正确引导城镇化的过程产生积极意义。 相似文献
45.
山西古村镇类型及社会记忆符号系统研究 总被引：1，自引：0，他引：1
社会记忆是依附于社会群体产生的一种趋同性的社会文化符号。本研究利用结构主义符号学的分析方法,通过“要素体-因子层-属性脉”的三维层次构建社会记忆的符号系统,基于中国传统社会生产、生活方式的视角,从地脉、人脉、文脉的“三脉”属性对古村镇的类型及特征进行解读,发现：①“农”型古村镇社会记忆的宜农宜居、望族乡贤、天人合一的三脉属性符号特征明显;②“商”型古村镇具有对外通达的地脉记忆,精致讲究的文脉记忆和名商名士的人脉记忆;③“军”型古村镇的社会记忆在据险扼要、防御之上、将军传奇的三脉属性特征更加突出;④“工”型古村镇具有矿藏丰富、炉旺风顺、匠人传奇的特色社会记忆的符号特征。 相似文献
46.
ABSTRACT Land to accommodate urban development in China is provided through requisitions by government officials, suggesting that land availability may be a constraint on urban economic growth. An econometric model of urban GDP growth suggests that land has constrained economic growth in coastal areas but not elsewhere. Elasticities calculated from the estimated coefficients indicate that land availability has a larger proportional impact on economic growth than domestic and foreign investment, labor supply, and government spending. The estimated parameters provide evidence about arbitrage opportunities created by discrepancies between urban land value and compensation for requisitioned rural land, suggesting rural unrest associated with conversion of farmland to urban uses may have some economic roots. 相似文献
47.
清中期的江南艺文世界处于一种中兴的状态。以家族为核心的诗人、画家们荟集其间,他们集群地交游宴集、赋诗作画,以巨大热情投身到种种艺文活动之中,将自古以来江南特有诗画相辉的艺文品格发挥到新的极点。 相似文献
48.
吴地山歌又称吴歌,其产生发展源远流长,流传区域早已不限于吴语地区。明代中晚期,是吴歌发展的极盛时期,冯梦龙就是这个时期最具影响力的代表人物。他以大量的精力从事吴歌俗曲的采集、整理、编辑、评点,刊印了《挂枝儿》《山歌》两本民歌专集,对我国的民间文学事业作出了重大的贡献。作为冯梦龙家乡和吴歌传唱中心的苏州,新中国成立以来,在吴歌的挖掘、研究方面做了大量工作。2006年,吴歌被列入首批国家非物质文化遗产保护名录。近几年来,随着冯梦龙文化研究的不断深入,在吴歌的保护与传承、创新与发展方面开展了一系列的活动,取得了一定成果,对于弘扬优秀传统文化,繁荣新时代文化事业具有十分重要的现实意义。 相似文献
49.
Social media outlets such as Twitter constitute valuable data sources for understanding human activities in the virtual world from a geographic perspective. This article examines spatial distribution of tweets and densities within cities. The cities refer to natural cities that are automatically aggregated from a country's small street blocks, so called city blocks. We adopted street blocks (rather than census tracts) as the basic geographic units and topological center (rather than geometric center) to assess how tweets and densities vary from the center to the peripheral border. We found that, within a city from the center to the periphery, the tweets first increase and then decrease, while the densities decrease in general. These increases and decreases fluctuate dramatically, and differ significantly from those if census tracts are used as the basic geographic units. We also found that the decrease of densities from the center to the periphery is less significant, and even disappears, if an arbitrarily defined city border is adopted. These findings prove that natural cities and their topological centers are better than their counterparts (conventionally defined cities and city centers) for geographic research. Based on this study, we believe that tweet densities can be a good surrogate of population densities. If this belief is proved to be true, social media data could help solve the dispute surrounding exponential or power function of urban population density. 相似文献
50.
X‐L. Chen Y‐M. Fang Y‐W. Hu Y‐F. Hou P. Lü J. Yuan G‐D. Song B. T. Fuller M. P. Richards 《International Journal of Osteoarchaeology》2016,26(5):808-817
During the late Longshan period (ca. 4200–3900 BP) settlements on the Central Plains of China underwent a diversification in food production technologies, which set the stage for rapid economic and social development. The introduction of novel domesticates such as rice, wheat, cattle, and sheep not only provided more food choices, but also changed ideas concerning land use, farming techniques, and the use and mobilization of large scale labor forces. To better understand the contribution that these new dietary items and practices made to shaping the late Longshan period societies, a stable isotope ratio study of humans (n = 12) and animals (n = 42) was conducted at the late Longshan period site of Wadian. The human δ13C and δ15N values are clustered into two distinct groups. One group of nine individuals (δ13C = −9.9 ± 0.7‰; δ15N = 7.5 ± 0.5‰) had a predominately C4 diet based on millet grains with little protein input from the domestic animals. The other group of three individuals (δ13C = −14.3 ± 0.8‰; δ15N = 10.2 ± 0.3‰) had a mixed C3/C4 diet of millets and rice and were consuming sheep and cattle. The animals also displayed dietary diversity with the pigs (δ13C = −11.3 ± 2.5‰; δ15N = 6.9 ± 1.0‰, n = 10) and dogs (δ13C = −10.1 ± 1.0‰; δ15N = 7.2 ± 1.1‰, n = 7) having mostly a C4 plant based diet (millets). In contrast, the cattle (δ13C = −12.8 ± 2.1‰; δ15N = 7.6 ± 0.7‰, n = 9), sheep (δ13C = −16.7 ± 0.9‰; δ15N = 7.6 ± 0.1‰, n = 2), and cervids (δ13C = −20.8 ± 0.9‰; δ15N = 5.0 ± 1.2‰, n = 10) had diets with a greater contribution from C3 sources such as rice and wild plants. The discovery that humans and animals had different subsistence patterns indicates dietary complexity at Wadian and that rice agriculture, and cattle and sheep husbandry practices were already an important part of the local economy by the late Longshan period in the southern region of the Central Plains of China. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献