污染大气中浑仪,简仪的带锈防护

浑仪、简仪（以下简称两仪）在高PH、大气污染和日晒雨淋环境中的腐蚀是一种动态加速腐蚀过程。采用合成的双唑胺铜缓蚀剂和有机硅改性的甲基丙烯酸树脂,并分别复配成协同缓蚀剂群和含有增效稳定剂的封护剂。采用这两种材料和脱水后再防护的工艺,使带锈防护后的浑仪、简仪的腐蚀低于无污染大气中的速率。用电化学方法评价了防护技术的可行性,根据腐蚀与人工老化试验结果讨论了防护材料性能与腐蚀环境和带锈防护的关系,采用XPS分析方法探索了双唑胺比BTA更适用于两仪防护的原因。     

西汉合浦郡之朱卢县考

汉元帝初元三年罢珠崖郡后,海南岛之归属和建置情况如何?学术界对此长期争论不休。明代,海南王佐认为自汉元帝罢珠崖郡后,海南岛成为中原王朝的域外之地,直至南朝梁武帝大同中因海南儋耳归附于洗夫人才内属。唐胄则认为汉元帝罢珠崖郡后,仅八十六年本岛就又内属。当代,谭其骧先生的观点与王佐大致相同。杨武泉先生则认为从西汉晚期至萧齐,大陆王朝一直在岛上设置县级地方政权。本文虽赞同杨先生的观点,但所用资料和研究方法与之不同,而且只探考西汉朱卢县。认为只需要弄清朱卢县的位置,就可以彻底解决这一历史悬案。现依据许多学术界未曾提及的重要古籍资料和西汉"朱廬執刲"银印所蕴涵的重要信息,采用考据学研究方法,从五个方面来进行考察,所得结论是:西汉合浦郡的朱卢县应当在海南岛。     

李流芳艺术创作简论

在绘画创作中,李流芳的山水画在晚明画坛颇具代表性,其山水画在空间处理上已呈平面化趋势,树木山石的画法也具有某种符号化的特征,这种为追求形式之美而舍弃写实的描绘与明末形式主义画家有共同之处。     

“苑玺”考

《古玺汇编》0358是一方楚玺,首字未识,我们认为此字应分析为从阜,夗声,奂亦声,在玺文中疑读作"苑"。苑玺,是掌管苑囿的官员所用玺印。此官大概相当于《周礼》中的"囿人"。     

The notion τὸ πέρας τῆς ἀνακομιδῆς and the location of Ptolemais of the Hunts in the Periplus of the Erythraean Sea

The Periplus of the Erythraean Sea describes the route of a trade ship in the ancient Erythraean Sea following certain reference points. One of these was called τ? π?ρα? τ?? ?νακομιδ??, from which the distance to Ptolemais of the Hunts was given. It was generally understood as the ‘endpoint of return’ and thought to be Berenice. In fact, the phrase is to be understood as ‘the endpoint of sailing/delivery from (Egypt)’ and the place appears to be identifiable with modern Anfile Bay, where the trade ships turned back. The port itself had to be visited on the way back to Egypt. The reason was connected with the primary goal of the establishment of the port: it was much more practical to take elephants aboard on the way back to Egypt. The information on Ptolemais of the Hunts seems to derive from a late Ptolemaic source. The exact route of the ship, referred to by the author of the Periplus, is unknown and even knowledge of the exact distance from the reference point does not allow us to identify a region, where Ptolemais of the Hunts is to be sought.     

高光谱图像系统应用于模糊印章的提取研究

传统书画作品中存在有大量模糊不清的印章,对此类印章尚没有很好的手段进行提取和鉴别。为解决这一问题,本工作采用一种用高光谱图像系统采集书画中模糊印章的光谱-图像信息,采用最小噪声分离变换(MNF)处理光谱图像数据,提升了模糊印章的可辨识度。结果表明,采用该方法能够有效的将模糊印章的信息提取出来,有利于印章的鉴别和研究,为书画的文物价值和真伪鉴别的研究提供了科学有效的手段。     

A Transformed Life? Geoffrey of Dutton,the Fifth Crusade,and the Holy Cross of Norton

Despite the volume of scholarship dedicated to crusade motivation, comparative little has been said on how the crusades affected the lives of individuals, and how this played out once the returned home. Taking as a case study a Cheshire landholder, Geoffrey of Dutton, this article looks at the reasons for his crusade participation and his actions once he returned to Cheshire, arguing that he was changed by his experiences to the extent that he was concerned with remembering and conveying his own status as a returned pilgrim. It also looks at the impact of a relic of the True Cross he brought back and gave to the Augustinian priory of Norton.     

Faults and fault properties in hydrocarbon flow models

The petroleum industry uses subsurface flow models for two principal purposes: to model the flow of hydrocarbons into traps over geological time, and to simulate the production of hydrocarbon from reservoirs over periods of decades or less. Faults, which are three-dimensional volumes, are approximated in both modelling applications as planar membranes onto which predictions of the most important fault-related flow properties are mapped. Faults in porous clastic reservoirs are generally baffles or barriers to flow and the relevant flow properties are therefore very different to those which are important in conductive fracture flow systems. A critical review and discussion is offered on the work-flows used to predict and model capillary threshold pressure for exploration fault seal analysis and fault transmissibility multipliers for production simulation, and of the data from which the predictions derive. New flow simulation models confirm that failure of intra-reservoir sealing faults can occur during a reservoir depressurization via a water-drive mechanism, but contrary to anecdotal reports, published examples of production-induced seal failure are elusive. Ignoring the three-dimensional structure of fault zones can sometimes have a significant influence on production-related flow, and a series of models illustrating flow associated with relay zones are discussed.     

The earliest cylinder seal in the Arabian Peninsula

A cylinder seal of Late Uruk (late fourth millennium BC) type from Abu Dhabi is presented and analysed. Comparisons with excavated finds from elsewhere in the Near East are discussed. An inventory of cylinder seals from sites in the UAE and the Sultanate of Oman shows that cylinder seal use, while not unknown in the region, was never very great. The ways in which the seal may have arrived at its eventual place of discovery are described and the significance of the seal is assessed.     

河南博物院藏明清时期的印章

本文对河南博物院收藏明清时期的印章加以论述考证,概括它们各时期的特点等。