＂I Want to Be a Wildlife Protector When I Grow up＂

This team of wildlife protectors is a group of local antihunting herdsmen living on the Changtang Grassland of Tibet.The team members obtained the local government's support by providing some supplementary funds. This group of herdsmen regularly patrols their administrative     

Predicting Ductile Crack Initiation of Steel Bridge Structures Due to Extremely Low-Cycle Fatigue Using Local and Non-Local Models

The strain-based prediction model combining the Miner's rule and Manson-Coffin's relationship provides a local parameter for evaluating the ductile crack initiation of steel structures, and some modified models based on it were proposed to evaluate extremely low-cycle fatigue (ELCF) behaviors of steel structures. Previous research has confirmed these local models to be an accurate index for ductile crack initiation in steel bridge piers, however it is found to quite depend on the mesh size of the numerical model used. In this study, a non local damage parameter is presented and successfully applied to ductile crack initiation life assessment of steel bridge piers subjected to earthquake-type cyclic loading. The non local damage parameter is based on averaging the strains over the effective plane using a weight function in the exponential form, and introduces the non local damage parameter to replace the local state variable. Finite element analysis with three different mesh sizes is employed. Comparisons of the local and non local solutions with those of experiments indicate that the non local prediction model can predict the ductile crack initiation of steel bridge piers with good accuracy regardless of the specimen geometries and loading histories, meanwhile the mesh independent nature of the non local model is also demonstrated.     

解放战争时期香港《华商报》的历史地位和特点

1946年复刊后的香港《华商报》是中共在香港创办的一份有重大影响的报纸,它不仅是宣传中共的坚强舆论阵地,也是联络统战工作的联络站。它内容丰富,涉及到政治、军事、外交、经济、文化等多方面,全面反映了解放战争时期国内外生动的历史画卷。它以其独特的方式积极探索了在资本主义条件下办社会主义报纸的特点,为今天媒体的换位思考可提供某些经验。     

Flexibility and Public Accountability in Public Land Development Projects in Progress

Abstract

Local authorities have moved many entrepreneurial activities outside the direct control of the municipal council. This includes land development activities relating to planning policies which involve both private development and public infrastructure. Many studies have shown that positioning activities outside the control of elected bodies undermines public accountability. Less is known, however, about public accountability in contexts where entrepreneurial activities are still run by the local authority. This issue may be particularly relevant when it comes to projects that are already underway because entrepreneurial activities imply flexibility and the choices made as part of this flexibility also need to be justified. This paper is based on a study of five key projects in a single municipality, Midden-Delfland in the Rotterdam/The Hague metropolitan region in the Netherlands, and analyses how land development projects are organized within a local authority. It shows that while they are structured to allow for flexibility in the process, the level of public accountability is not ideal. The quality of arguments used and the way in which decisions are justified leave room for improvement, which might be promising because they are organized within the local authority.     

子弟书作者"鹤侣氏"生平、家世考略

十八世纪后半和十九世纪流行于北京、天津、沈阳等地的曲艺形式子弟书,正愈来愈受到重视.继上海古籍出版社的《子弟书丛钞》之后,最近,又有两家出版社先后出版了经过整理的《清车王府钞藏曲本子弟书集》,为我们认识、研究这种特殊的曲艺形式提供了资料.     

馆藏剥制动物标本害虫防治法的研究进展

剥制动物标本作为自然博物馆的重要藏品,具有极高的收藏、研究和展览价值,但因其本身富含有机质,极易遭受害虫的损害。传统有毒化学药品消杀法是博物馆防治害虫的重要方法,该法在将数以万计的剥制动物标本成功保存下来的同时也给人类健康和自然环境带来了严重的危害。科学家一直在探寻各种新型的动物标本害虫防治方法,希望在防治虫害和保护人类健康及自然环境之间找到最佳的平衡点。国内博物馆收藏有数量庞大的剥制动物标本,但相应的害虫防治技术研究却相对滞后并严重阻碍了博物馆行业的健康发展。在综合国内外现有相关文献的基础上,对剥制动物标本制作工艺、虫害及防治方法的研究进展综述,以期为我国博物馆工作提供参考资料。     

中印边界西段的东半部分有条约根据吗?——试析20世纪五六十年代中印双方关于边界问题的一个分歧

在20世纪五六十年代的中印边界争端中,印度政府认为,1684年条约和1842年条约是其主张的中印边界西段东半部分（西藏-拉达克边界）的条约根据。但中国政府认为这两个条约并不能成为这段边界合法有效的条约根据。中国政府的主张是有事实依据的,而印度政府的观点则是无法成立的。     

云南古代镍白铜初探

本文简要介绍了镍白铜的性质及用途,指出了镍白铜是由云南滇东北一带最早创造和发明的。回顾了18、19世纪“云白铜”西传的历史。     

故宫清代年款琉璃瓦釉的成分及相关问题研究

在故宫古建大修中发现一批带有清代年款的琉璃瓦件,这些瓦件的制作原料、烧制工艺反映了当时的技术水平,同时也反映了国家对建筑琉璃生产的管理状况。本文着眼于琉璃瓦釉的研究,开展了成分分析、釉烧温度分析,并探讨了成分变化的原因、以及成分变化对釉的性能和胎釉匹配性的影响。研究结果表明:雍正至宣统时期,釉中PbO含量呈降低的趋势、SiO2含量呈升高的趋势,特别是雍正至乾隆时期变化较为明显。这一变化可能与乾隆元年对雍正朝琉璃瓦釉料用铅量的核减有关。釉的成分变化导致釉的流动点温度升高,釉的热膨胀系数降低。乾隆时期出现了一批胎釉热膨胀系数匹配性较好的瓦件。