银纪念币的腐蚀变色研究

银纪念币在大气环境中表面发生变色，失去原有的金属光泽。采用OM，SEM，EMPA，XPS，XRD等现代物理测试技术对变色的银纪念币进行分析。结果表明，银纪念币的变色部位呈均匀的浅褐色，并随机分布着深褐色的斑点。变色银纪念币表面沿着划痕密集分布着蚀孔。表面分析显示，除Ag外，还有S和O元素。XPS，XRD分析发现，变色银纪念币表面存在Ag2S，Ag2SO3和Ag2O。实验室加速变色试验毒明，在含S气体环境中，Ag被氧化生成A82S，导致银纪念币表面变色,从而验证银纪念币的变色是由电化学腐蚀引起的，S和O元素参与了腐蚀历程。     

Combining shared-coin algorithms

This paper shows that shared-coin algorithms can be combined to optimize several complexity measures, even in the presence of a strong adversary. By combining shared coins of Bracha and Rachman (1991) [10] and of Aspnes and Waarts (1996) [7], this yields a shared-coin algorithm, and hence, a randomized consensus algorithm, with O(nlog²n)$O\left(n{log}^{2}n\right)$ individual work and O(n²logn)$O(n^{2}logn)$ total work, using single-writer registers. This improves upon each of the above shared coins (where the former has a high cost for individual work, while the latter reduces it but pays in the total work), and is currently the best for this model.     

自动硬币清分打包机的设计

目的为了方便对硬币进行分类、整理和包装,设计一种自动硬币清分打包机。方法在PLC程序控制下,通过上料机构将硬币筛选分离,然后对分类后的硬币进行计数、换向、打包,打包后的硬币会移动到箱中。结果设计的自动硬币清分打包机分类准、精度高、速度快,能够区分4个币种,速度可以达到14卷/min。结论该硬币清分打包机适于在硬币流通量大的机构进行推广应用,有较好的市场前景。     

中西古货币设计事理比较

目的探索中西古钱币不同形式与风格的形成原因,研究设计过程中的"事理学"规律,指导今后的产品设计过程。方法通过对古中国与古希腊钱币的形式风格、制作材料工艺、所处的自然地理环境以及所解决的"事"进行的逐步比较,从其表象到更深层次的影响因素进行研究探索,得到钱币设计过程中所应用的普遍规律。结论中西古钱币形式与风格的差异不仅是由制造与使用钱币的主体不同造成的,而且自然地理环境、政治宗教环境等多种外部因素对钱币的制作材料、表现题材、制作工艺等也产生了影响,从而形成了独有的形式与风格。可以看出钱币的设计过程受到内部因素与外部因素的共同影响,虽然古钱币造物的"事"不同,但是其中的规律,即"事理"是相同的。     

古钱币元素的文创产品品牌化包装设计研究

目的 分析古钱币元素在文创品牌产品包装上的应用,并通过实例对文创品牌包装设计进行归纳总结。方法 通过文献资料法、田野考察法及实践性研究分析,对古钱币元素在文创产品上的相关情况进行概述,并阐述文创产品包装设计的重要性,主要以秦半两古钱币元素文创品牌包装实例为分析重点,对文创品牌包装设计细节及品牌标志进行设计研究,结论 古钱币元素在产品设计中是极为经典的元素,但文创产品设计中古钱币元素的应用较为单一,面对文创产品需品牌化的现状,体现品牌化的其中一点就是品牌包装设计。基于秦半两古钱币元素,研究文创品牌服饰的标志及包装设计,得出包装是文创产品品牌化的重点体现之一,同时总结了文创品牌的标志设计原则及文创产品品牌包装设计原则。     

Protective Strategies and Emotions Invested in Early Modern Danish Christening Garments

Abstract

In 2006–2007, Den Gamle By, National Open Air Museum of Urban History and Culture in Denmark staged a large exhibition of christening garments dating from the eighteenth century until the present. It was called “Christian Clothing and Baptismal Robes over 300 years.” More than 100 objects were exhibited. Garments for babies remind us of the vulnerability of the newborn and in this way they are emotional objects for us today and probably also in the past. Elements of vulnerability are especially obvious for modern viewers when the garments originate from earlier periods with much higher infant mortality rates than today. Parents in earlier centuries used various strategies to protect their small pagans from exposure to evil before baptism. In this way emotions were invested in the garments, but it is a challenge to access and analyze these emotions because the garments themselves do not constitute a language in the same way as written texts. The article will deal with three different material elements which might be considered protective strategies for babies. The first and longest part of the article presents the color red as a means of protection. The next section considers the use of metal as protection against evil and coins as vehicles of good fortune. The third and shortest section discusses the reuse of ritual garments in new ceremonial contexts. When their provenance is known, it is striking that several baptismal garments represent a reuse of garments from weddings or other rites de passage, as termed by Arnold van Gennep.     

由群签名实现的可撤销匿名性的电子现金方案

利用群签名加上一次性标记实现了可撤销匿名性的电子现金方案。方案中群管理者为银行,仅负责向成为群成员的消费者发行证书（电子现金）,由一个可信第三方负责撤销匿名性。方案采用Ateniese等人提出的群签名方案,可满足电子现金方案多方面的安全要求和具有较高的效率。     

Transparent polysilicone coatings as protecting films for gold commemorative coins

Novel transparent organic silicone resin coatings were successfully prepared through the reaction between the alkoxy groups of methyltrimethoxy‐silane (MTMS) and γ‐aminopropyltriethoxysilane (APTES) and hydroxyl groups of hydroxyl terminated silicone oil (HTSO). The influences of different monomer feed mass ratio on the coating properties were investigated via measuring the hydrophobicity and hardness of coating films. The coating films were characterized with IR, UV, TG, scanning electron microscope (SEM), and automatic contact angle meter. Some properties of coating films, such as adhesion, impact resistance, and wear‐resistance, were also evaluated. The results indicated that these coating films formed on the surfaces of gold commemorative coins possessed some good properties including high hydrophobicity, high water contact angles, high light transmittance, good heat‐resistance, adhesion, hardness, and weatherability, etc. Moreover, the uniform, clear, transparent, and dense coating films did not cover the symphony surface patterns or affect the metallic luster. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Characterization of the silver coins of the Hoard of Beçin by X-ray based methods

Four hundred sixteen silver coins stemming from the Ottoman Empire (16th and 17th centuries) were analyzed in order to confirm the fineness of the coinage as well as to study the provenance of the alloy used for the coins. As most of the coins showed the typical green patina on their surfaces due to corrosion processes which have led to the depletion of copper in the near-surface domains of the silver coins in comparison to their core composition, small samples by cutting splinters from the coins had to be taken, embedded in synthetic resin and cross-sectioned in order to investigate the true-heart metal composition. The type of the alloy was investigated as well as if coins minted in different locations demonstrated homogeneous traits concerning the predominant impurities which could suggest a common ore. Several X-ray based techniques (μ-XRF, μ-SRXRF and μ-PIXE) could be applied in order to determine the silver contents as well as the minor and trace elements. Finally, SEM/EDX was applied in order to study the homogeneity/heterogeneity of the coins and the presence of surface enrichments. In general, the silver content of the analyzed specimen varies between 90% and 95%. These outcomes have not supported the historical interpretations, which predict that during the period studied a debasement of approximately 44% of the silver content of the coins should have occurred.     

硬币自动分类器的研制

通过对硬币自动分类原理进行研究,发现不同面值的硬币在直径和重量上的细微差别可以作为区分它们的依据.据此设计了硬币自动分类器,并加工出实物模型.实验表明,该硬币自动分类器能实现硬币分类和整理收纳的功能.