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981.
清顺治元年(1644)至乾隆五年(1740),清政府规定造黄铜钱流通,其材质是铜锌合金,其中铜的含量或有变化,通常在50-70%之间(实际操作中常不相符合)。乾隆五年,清廷颁行“青钱”,其材质改为铜、锌、铅、锡四元合金。直至乾隆五十九(1794)年止,几乎整个乾隆朝都在铸行“青钱”。改铸“青钱”对清政府来说也是一件大事,其不仅仅意味着铸钱成分、铸钱技术等方面的变化,甚至引起清廷矿业政策的变化,如,铅、锡矿的大量开采;同时,也反映了清前期存在的货币问题,当时货币理论发展水平及政府处理经济问题的能力。但目前对清代货币的研究大多集中在白银问… 相似文献
982.
朱本源先生在六十年学术生涯中,在史学这块园地里辛勤耕耘,作出了突出的成就,受到学术界的广泛推崇.前不久,《朱本源史学文集》（陕西师范大学出版社,2005年11月版,以下简称《文集》）出版了.《文集》收集了朱本源先生近半个世纪以来所发表的一些具有代表性的论文.这部文集有两个突出特点,其一,朱先生学贯中西,博古通今,他所具有的马克思主义理论修养、严格的西方哲学的训练,使他对中外政治制度、思想文化的历史、演变具有广阔的学术视野和非凡的洞察力.因而,这部文集对于我们了解朱先生在史学理论多个领域的观点、方法以及所取得的突出成就,具有重要作用;其二,《文集》也高度凝结了朱先生长达六十余年来研究西方哲学和历史之经验, 相似文献
983.
984.
985.
马是个吉祥之物,它与人类的关系自古以来就是密不可分的,是人类征服自然、改造自然的工具,征战、狩猎、商旅、游宴、农耕、运输、通讯等都离不开它。在古代,金戈铁马是开疆扩土的保证,香车名马是上流社会身份的象征,还有在沙场上与主人生死与共的传奇。中华民族把马视为迅捷、勇敢、奔放、成功的象征物。即使在现代社会, 相似文献
986.
Wang Yuanyuan 《中国西藏(英文版)》2020,(6):46-48
Shetongmon County is seated 4,300 meters above sea level and falls under the jurisdiction of Shigatse City within the Tibet Autonomous Region.The name essential... 相似文献
987.
J. Zhu Y. Zhang T. Wang C. H. Zhao J. C. Yu M. D. Glascock C. S. Wang 《Archaeometry》2014,56(4):562-572
The traditional thermal expansion method using a dilatometer fails to accurately determine the original firing temperatures of low‐fired ancient pottery. For this reason, we have developed an improved method of determining firing temperatures for low‐fired pottery. This paper explains the theory of the improved method and presents the reasonably satisfactory results obtained on ancient pottery from the Donghulin site (c. 10 000 bp ). The method and the results are very important for the study of ancient pottery culture and clay moulds used for bronze casting. 相似文献
988.
Mei Wang 《Alcheringa: An Australasian Journal of Paleontology》2013,37(3):391-397
A new genus with two new species, Scabolyda orientalis gen. et sp. nov. and Scabolyda incompleta sp. nov., assigned to the subfamily Juralydinae in the family Pamphiliidae are described and illustrated. They were collected from the Middle Jurassic Jiulongshan Formation and the Lower Cretaceous Yixian Formation in northeastern China. They represent the first fossil pamphiliids described from China. 相似文献
989.
Li‐jung Wang 《International Journal of Cultural Policy》2013,19(3):301-318
This study explores the contradictions and challenges in the development of multiculturalism in cultural policy in Taiwan. The approach used involves an exposition and critique of the two dominant models of multiculturalism in Western theory – namely, liberal multiculturalism and postmodern multiculturalism. From the perspective of liberal multiculturalism, I argue that ignorance of multicultural citizenship limits the scope and impact of multicultural policy. I then go on to suggest that postmodern multiculturalism addresses problems related to the visibility of cultural differences and shifting identities. Through analysing the various contradictions and challenges inherent in these two approaches, this study hopes to identify appropriate forms of multiculturalism capable of taking into account both multicultural citizenship and the dynamics of cultural diversity. 相似文献
990.
This study assesses the displacement of coalbed methane by CO2 migration along a fault into the coal seam in the Yaojie coalfield. Coal and gas samples were collected continuously at various distances in NO.2 coal seam from F19 fault. Vitrinite reflectance, maceral, and pore distributions and proximate analysis of fourteen coal samples were performed. Gas components, concentrations, carbon isotopes of 28 gas samples were determined. We examined the coal–gas trace characteristics of coalbed methane displaced away from the fault by CO2 injection after geological ages. From east to west, away from the F19 fault, the CO2 concentration decreased, whereas the CH4 concentration increased gradually. The δ13C values for CO2 varied between ?9.94‰ and 1.12‰, suggesting a metamorphic origin. A wider range of values (from ?9.94‰ to 20‰) was associated with the mixing of microbial carbon dioxide, isotopic fractionation during CO2 migration through the microporous structures of coals, and/or carbon isotope fractionation during gas–water exchange and dissolution of CO2. Away from the F19 fault, the volumes of micropores, mesopores and macropores decrease gradually. The Dubinin–Radushkevich (DR) micropore volume decreased from 0.0059 to 0.0037 cm3 g‐1, and the mesopore and macropore volumes decreased from 0.066 to 0.026 cm3 g‐1. The CO2 injection can mobilize aromatic hydrocarbons and mineral matter from coal matrix, resulting in the decrease in the absorption peak intensity for coal samples after supercritical CO2 treatment, which indicates that chemical reactions occur between coal and CO2, not only physical adsorption. 相似文献