城镇化视角下的土地流转影响因素研究——基于安徽5个市的农户调研数据

影响土地流转意愿的因素主要包括制度因素、经济因素、政策因素等.本文在城镇化背景下,基于农户角度,通过入户调查和logistic回归模型,研究家庭所在区域、城市购房打算等社会化因素,和土地收入、土地社会保障等土地功能因素对土地流转意愿产生的影响.研究结果表明,农户的社会化因素和土地功能因素对土地流转意愿均产生显著影响.     

Assessing Risk‐Based Upper Limits of Melamine Migration from Food Containers

Melamine contamination of food has become a major food safety issue because of incidents of infant disease caused by exposure to this chemical. This study was aimed at establishing a safety limit in Taiwan for the degree of melamine migration from food containers. Health risk assessment was performed for three exposure groups (preschool children, individuals who dine out, and elderly residents of nursing homes). Selected values of tolerable daily intake (TDI) for melamine were used to calculate the reference migration concentration limit (RMCL) or reference specific migration limit (RSML) for melamine food containers. The only existing values of these limits for international standards today are 1.2 mg/L (0.2 mg/dm²) in China and 30 mg/L (5 mg/dm²) in the European Union. The factors used in the calculations included the specific surface area of food containers, daily food consumption rate, body weight, TDI, and the percentile of the population protected at a given migration concentration limit (MCL). The results indicate that children are indeed at higher risk of melamine exposure at toxic levels than are other groups and that the 95th percentile of MCL (specific surface area = 5) for children aged 1–6 years should be the RMCL (0.07 mg/dm²) for protecting the sensitive and general population.     

为《皆大欢喜》中的丑角试金石一辩

莎士比亚塑造了诸多耳熟能详的人物形象,《皆大欢喜》中的试金石是剧中的"丑角"。作为职业小丑,其幽默风趣随处可见。同时,他与村姑奥德蕾的感情、与忧郁旅人杰奎斯和牧羊人柯林的交流,展现出其幽默风趣外的另一面。分析试金石与三者之间的对话,总结变色龙般的试金石的独特"丑色",并进一步探索试金石"丑角"身份反映出的文艺复兴时期普通民众的心理诉求。     

利用伪随机信号系统辨识钻柱系统

用白噪声信号作为输入信号对钻柱系统脉冲响应进行辨识。研究了伪随机信号的特征及伪随机信号产生的方法,得出了用伪随机信号代替白噪声信号辨识钻柱系统脉冲响应的结论。结合输入信号和输出信号,利用钻柱系统的脉冲响应,讨论了钻柱的临界转速、钻柱共振、钻柱与井壁之间的相互作用、所钻地层岩性等钻井工程问题。     

On a system of nonhomogeneous components sharing a common frailty

The components of a reliability system subjected to a common random environment usually have dependent lifetimes. This paper studies the stochastic properties of such a system with lifetimes of the components following multivariate frailty models and multivariate mixed proportional reversed hazard rate (PRHR) models, respectively. Through doing stochastic comparison, we devote to throwing a new light on how the random environment affects the number of working components of a reliability system and on assessing the performance of a k-out-of-n system.     

井田制研究与近代中国——20世纪前半期的井田制研究及其意义

长期以来,土地制度是中国社会的基础。而作为其源头的"井田制"不仅仅作为一个"历史"事实,同时还作为"理想"与"现实"贯穿于历史的始终,成为中国传统学术中的经典问题。进入近代之后,在救亡压力与西方文明的冲击下,传统上对于井田制之"历史"、"理想"、"现实"三维度统一的理解也分裂了,呈现为"理想—现实"(今文经学)与"历史—现实"(古文经学)的两个极端。而在进入民国之后,在西方社会科学的影响之下,众多学者们开始在新的意义上探索井田制之三维度的新关联,同时也是试图通过重新理解传统,来探索中国走向现代社会的方向。20世纪20年代有胡适和柳诒徵对于"历史"维度与"理想"维度的分别探索,30-40年代则有郭沫若、高耘晖等开始在社会理论的基础上重新统一"历史"、"理想"、"现实"三维度的尝试。在这些尝试中,"历史"与"理想"维度间的张力继续成为问题焦点。这些重要研究深化了井田制新研究的各个侧面,为我们今后进一步探究井田制的意义,并在此基础上深入理解中国社会的现状与未来奠定了基础。     

Perceived Need for Home- and Community-Based Services: Experiences of Urban Chinese Older Adults With Functional Impairments

Guided by Cantor’s social care model, this study identified individual, family, and social support factors that influence urban older adults’ need for home- and community-based services, including medical and rehabilitation, instrumental care and support, and psychosocial services. The data were extracted from the Sample Survey on Aged Population in Urban/Rural China conducted by the China Research Center on Aging in 2006. Results from multiple logistic regression show that older adults’ need for medical and rehabilitation services is significantly related to instrumental activities of daily living, depression, not having filial children, friend support networks, and having a confidant. Older adults’ need for instrumental care and support is related to their educational attainment, financial strain, instrumental activities of daily living, not living with children, and friend support networks. Finally, older adults’ need for psychosocial services is significantly related to educational attainment, depression, not being married, friend support networks, and having a confidant. Implications for social service development are discussed.     

Family Relationships,Social Connections,and Depressive Symptoms Among Chinese Older Adults in International Migrant Families

This study explored whether and how family relationships and social connections influence depressive symptoms of older migrants and older adults in transnational families using the data gathered from a cross-sectional survey in Los Angeles, California, United States, and Beijing, China. Regression results showed that the older migrants reported significantly higher levels of depression than the elders in transnational families. The findings highlight the importance of maintaining close family relations and having large friendship networks for older adults in international migrant families.     

吉林省手风琴音乐创作的调查研究

目前,吉林省手风琴音乐的创作现状并不乐观,进行手风琴音乐创作的老艺人们大都年逾古稀,很多都已离世,只能从老艺人留下的历史资料或艺人们的口述中探寻当年吉林省手风琴音乐创作情况的蛛丝马迹.艺人们从事手风琴音乐创作的出发点除教学需要和个人兴趣之外,重要的一点是传承民族文化.要改善吉林省手风琴音乐创作的现状,一是要思考手风琴表演形式的创新,二是音乐创作素材的挖掘与思考.     

ＧＩＳ技术支持下的北宋初期丝路要道灵州道复原研究

在９世纪后半叶乃至整个１０世纪的丝绸之路东、中段交通网络系统中，灵州道占有一席之地。宋初，大食、回鹘、于阗以及归义军等民族政权多通过灵州道与北宋王朝进行经贸、文化往来。本文主要针对这一时段内灵州道的畅通情况及其道路性质进行探讨，在原有文献考证的基础上，利用考古资料、ＧＩＳ技术，尽可能实现对灵州道古地名数据的精确地理定位，最后使用ＡＲＣＧＩＳ技术，绘制灵州道的道路走向地图，为北宋灵州道区域的政治、经济、文化交流综合研究提供地理学依据。