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申利 《古籍整理研究学刊》2009,(3):56-59
文彦博是北宋的一代名臣,在文学和书法上也颇受推崇,传世文集有<文潞公集>40卷.<全宋诗>卷273至卷278"文彦博"条下辑录了他的诗集,集外又补辑8首,但仍有遗漏.本文主要根据<两宋名贤小集>和乾隆<济源县志>及同治<榆次县志>、<宋人小集>等文献,辑录集外佚诗计35首又2句.并勘正4处讹误. 相似文献
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中世纪晚期英国市场结构的转型 总被引:1,自引:0,他引:1
前工业时期英国城乡市场体系初步形成于12至14世纪,其中各级城市市场和农村市场发挥着不同的作用。中世纪后期由于市场需求结构的变化、纺织业的兴起及出口贸易的扩大、国际性大集市的衰落、交通运输状况的改善,使得市场结构完成了从以农村市场为主体向城市市场为主体的转型。市场结构的转型改变了市场的性质,密切了城乡关系,促进了城市体系的成熟,加速了以伦敦为聚核的经济一体化进程。 相似文献
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中世纪英格兰运输役起源于庄园领主的物资供应需求,随着12、13世纪市场的激增以及运输条件的改善,市场型运输役逐渐普及。运输役一般由农民上层承担,其运输距离、目的地、运输种类等都受习俗制约。运输役衰落的原因主要有直营领地的衰落、运输的专职化以及私下交易的流行。运输役的兴衰与中世纪英格兰市场培育密切相关,是市场已有一定发育但还不太成熟的产物。 相似文献
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Elaina Jennings Ershad Ziaei Pouria Bahmani Sangki Park Xiaoyun Shao 《Journal of Earthquake Engineering》2013,17(3):410-430
The FEMA P-807 Guidelines were developed for retrofitting soft-story wood-frame buildings based on existing data, and the method had not been verified through full-scale experimental testing. This article presents two different retrofit designs based directly on the FEMA P-807 Guidelines that were examined at several different seismic intensity levels. The effects of the retrofits on damage to the upper stories were investigated. The results from the hybrid testing verify that designs following the FEMA P-807 Guidelines meet specified performance levels and appear to successfully prevent collapse at significantly higher seismic intensity levels well beyond for which they were designed. Based on the test results presented in this article, it is recommended that the soft-story-only retrofit procedure can be followed when financial or other constraints limit the retrofit from bringing the soft-story building up to current code or applying performance-based procedures. 相似文献
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构造了一个由数量老龄化、结构老龄化和密度老龄化三个指标所组成的综合老龄化指数(CAI),并建立了一套人口老龄化空间类型划分方案,运用多尺度空间自相关分析对长春市人口老龄化空间的时空演变及空间类型进行研究。结果表明:①长春市近10年出现了老年人口郊区化的趋势,人口老龄化空间的“中心-边缘”分布格局在10年内没有发生显著改变,但空间扩散趋势十分明显,东部和南部近郊区出现了明显的人口老化趋势。②长春市形成了残留老化、集聚老化、自然老化和集聚稀释四种不同的人口老龄化类型区。城市核心区和远郊区形成以非老年人口大量流失为基本特征的残留老化型地区,而近郊区则形成以年轻人口大量涌入为特征的集聚稀释型地区,人口老龄化空间整体上呈现出一种城市中心区和远郊区的老化程度高于近郊区的夹层结构。 相似文献
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JAMES D. LEE SIYUAN SHEN MAJID T. MANZARI YIN-LIN SHEN 《Journal of Earthquake Engineering》2013,17(1):67-96
The dynamic finite element equations of a two-dimensional structure made of axial-flexural frame elements with tendon-driven actuators have been derived. A critical review of classical optimal control theory is made with respect to its application to the control of structure under seismic excitations. Seven control algorithms, including two newly proposed algorithms, have been described, investigated and discussed. The need of an optimal observer, Kalman filter, is discussed. The validity of separation theorem applicable to the optimal stochastic control of structure for earthquake resistance is shown. How the control system perform under the circumstances of actuator saturation is also shown. Several numerical examples are worked out to demonstrate and compare the efficiency and limitations of those control algorithms. 相似文献
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