微言天算,零记号以及瞿昙历对中国古代数学的推进

本文论述我国古代天文历法的修定以及零记号的使用对数学计算的推进。     

说纪年问题——由“2002年的第一场雪”谈起

“一年四季”、“二十四节气”等术语均基于农历而得,所以“2002年的第一场雪”中的纪年应以农历为准。我们应注意公历农历的换算问题。以及由公历农历共存所引起的节日、生日的处理等问题。     

Queering Data Collection: Using the Life History Calendar Method With Sexual-Minority Youth

ABSTRACT

A challenge for research with sexual-minority youth is to capture their unique stories in a way that heightens understanding of lived experience and promotes the development of culturally relevant programs and policies tailored for this population. One data collection approach that may be particularly useful for research with sexual-minority youth is the life history calendar (LHC) method. The LHC provides a visual, calendar-based assessment of life events and behaviors anchored by contextual cues to enhance retrospective recall. The purpose of this article is to examine the utility of the LHC method with sexual-minority youth and its potential to address three methodological and conceptual challenges: developmental complexity, shifting and evolving identities, and timing. The LHC method is illustrated using three studies conducted by the author as case examples. Findings suggest that the LHC offers several potential benefits for research with sexual-minority youth including its adaptable and flexible structure, capacity to assess event timing and sequence, mixed-methods capability, and its ability to engage and empower youth to co-create the interview process. Strengths and limitations of the LHC method and implications for research and practice with sexual-minority youth in a range of social service settings are discussed.     

敦煌吐鲁番文献所见回鹘古代历法

关于古代回鹘历法 ,史书少有记载 ,幸赖敦煌、吐鲁番回鹘文写本的发现与解读 ,为这一问题的研究提供了丰富而珍贵的资料。通过这些文献 ,我们可以看出 ,古代回鹘人曾使用过多种历法 ,既有来自中原的生肖纪年法、干支纪年法、建除满历法及年号纪年法 ,又有来自波斯的七曜历和来自于阗的于阗历 ,更有古回鹘人创造的具有民族特色的以五行与十二生肖相配的纪年方法 ,后者对藏族时轮历的形成可能有所影响。     

《尚书·胤征》舞容与后羿传说的蕴意

古文《尚书·胤征》与征战无关,《胤征》叙事关乎历法修正,关乎仪式舞蹈;《胤征》之“征”,不能读为征战之“征”,而是正历之“正”;“胤”与“羿”发音近似,胤即羿,“胤征”与“后羿射日”内涵一致;“胤征”与“后羿射日”是同一传说的分化;被视作“历史”的“胤征羲和”与被看成神话的“后羿射日”,都源于《山海经》,反映的都是上古先民测天修历的实践。     

Maintaining and Strengthening a Shaky Regime with Mnemonic Work: Inventing a Chinese National Day from 1949 Through 1987 in Taiwan

This paper investigates the invention of a Chinese National Day from 1949 through 1987 in Taiwan to illuminate the significance of mnemonic work in nation‐building. The 1949 Retreat after the Chinese Civil War resulted in a serious legitimacy crisis for the government of the Republic of China; thus, (re)inventing the National Day became an important mission to maintain and even strengthen this shaky regime. While the role of the standardized commemorative narrative in influencing people's collective memory is granted, this article emphasizes the aspect of embodied memory in nation‐remembering. I point out that the official Chinese nationalism constructed its National Day as “inevitably” bustling, memorialized, accepted, heroic, familial‐ized, blessed, and pivotal‐ized to shape the impression of a sacred and memorable day. This paper—while essentially consistent with Billig's argument of banal nationalism—suggests that national identity is accumulated by many symbolically encoded elements found in daily life; it goes further to argue that banal nationalism needs the “hot” nationalism found in special occasions to encode, refresh, and redefine the symbolic meaning of entities. That is, the oscillations between sacred and profane are needed to guarantee that patriotic emotions can be continually created and maintained.     

清水江文书纪年格式之“天运”考释

时间标识是契约文书中的关键要素,必须严谨准确。而在清水江文书中,多次出现以“天运+干支”格式的计时格式,给文书订立时间的确定带来辨识的障碍,而对“天运”的考释,也成为文书整理工作中的一大疑难。本文以《天柱文书》第一辑中的57份带“天运”字样的文书为例,在分类解析的基础上,考证“天运”格式的渊源,进而考察其形成原因,总结处理此一问题的有效方法。     

Hedging Barrier Options in GARCH Models with Transaction Costs

This study proposes a modified strike‐spread method for hedging barrier options in generalized autoregressive conditional heteroskedasticity (GARCH) models with transaction costs. A simulation study was conducted to investigate the hedging performance of the proposed method in comparison with several well‐known static methods for hedging barrier options. An accurate, easy‐to‐implement and fast scheme for generating the first passage time under the GARCH framework which enhances the accuracy and efficiency of the simulation is also proposed. Simulation results and an empirical study using real data indicate that the proposed approach has a promising performance for hedging barrier options in GARCH models when transaction costs are taken into consideration.     

基于DS12C887的实时日历时钟的设计

本系统采用单片机作为数字钟的核心控制器,读取时钟芯片的值,并通过显示器显示出来,而且可以通过按键电路给单片机执行信号,给时钟芯片赋初值。采用STC89C51作为主控单片机,时钟模块选用DS12C887作为时钟芯片,显示模块选用LCD1602,设置部分选用按键电路。其功能是在51单片机系统中设置、获取、记录实时的日历时钟信息并通过数码管显示,选用日历时钟芯片DS12C887作为实时时钟芯片,为系统提供详细的时间信息,次款芯片内部有锂电池,可以带掉电的情况下保存10年以上。     

古史年代学研究的误区--夏商周断代工程金文历谱问题分析

构建金文历谱以推求古史年代的方法,在目前对上古历法不能考明的情况下还不可行。夏商周断代工程依据少量铜器断代所建立的推定西周王年的支点多不可靠,为构建金文历谱所预设的西周历法要点也仍有待证明。工程列为标志性成果之一的共和以下历谱,由于不知共和原不单独纪年,可能问题最多,而由此上推共和以前年代亦必致多误。