旅游开发与乡土传统文化重构--旅游人类学视野中的乡土传统文化产业

全球化市场的催生,地方乡土传统文化被卷入现代化进程之中,乡土传统文化面临重构使命.旅游开发对乡土文化产业的推动是多方博弈的结果,文化多样性是乡土文化旅游的生命之基.对乡土传统文化集体自豪感和集体羞耻感的文化自觉将决定乡土传统文化的重构,乡土传统文化产业应该在保持乡土传统文化原生化自豪的基础上推进.     

Phylogeny constructed by using diversity increment

A new approach based on the concept of the diversity increment is applied to reconstruct a phylogeny. The phylogeny of the Eutherian orders use concatenated H-stranded amino acid sequences, and the result is consistent with the commonly accepted one for the Eutherians. Foundation item: Supported by the National Natural Science Foundation of China ( 30170214) and the Open Foundation of the State Key Laboratory of Software Engineer, Wuhan University, China. Biography: Shi Feng ( 1966- ), male, Ph. D, Associate professor, research direction: bioinformatics.     

Appreciative Inquiry: A Field Study of Community Development

The meaning of race, ethnicity, social class, and culture has rapidly changed within the last two decades. In addition to the tremendous growth of diverse populations in our neighborhoods, administrative policy changes have pushed community leaders to approach organizational engagement with diversity more comprehensively. Using Appreciative Inquiry method to achieve a high level of participation and to transform inner dialogue between the participants, this study is about doing systemic thinking and practice in a diverse inner-city setting in the United States. The results of this study indicate that Appreciative Inquiry method is an appropriate model for systemic practice in community development.     

东夷民族天文学初探

《逸周书》和《左传》记载,东夷民族已有了以鸟名为官名的天文历法官员,《尚书·尧典》记载了当时的天文历法,能确定二分二至.大汶口文化出土的陶文为上述文献记载提供了证据,说明当时已用日出方向确定春分,用测量日影确定二至.对遗址的实际测量,发现了陶文的天文意义.我国天文历法产生的年代,可追溯到5000a前,东夷民族天文学,是当时诸民族中较先进的天文学.     

Genotypic variation in foraging responses to environmental stimuli by honey bees,Apis mellifera

We experimentally tested a model predicting that colony-level genotypic diversity contributes to colonylevel foraging flexibility in honey bees. We established a colony into which we placed individually marked workers from three genetically distinct groups. The colony was placed in an enclosure that contained feeding stations with pollen and sugar syrup. Foraging resources, stores of pollen and the quantity of brood within the colony were varied temporally. Individual foragers switched between resource types in response to changes in relative resource quality and colony need, demonstrating flexibility in resource choice at the individual level. However, genetic groups within the colony varied in their tendency to collect pollen versus nectar, and in lability of response to changes in foraging stimuli. Our data suggest that within-colony genotypic diversity contributes to a resilient foraging response to environmental variation.     

快衰落信道中的分布式差分空时编码传输方案

针对分布式差分空时编码(DDSTC)在时间选择性快衰落信道中出现误码率平台的问题,提出了一种新的有效减小信号帧长的DDSTC传输方案(RFL-DDSTC)来抵抗快衰落信道的影响.该方案在中继节点处通过采用T个正交向量,将DDSTC在T个符号周期内的信号合并到1个符号周期内进行转发,使得DDSTC信号变为具有单位帧长的短信号.在目的节点,再对合并后的RFL-DDSTC信号用T个正交向量进行解调,即可还原出原始的DDSTC信号.该方案由于大大缩短了DDSTC信号的帧长,因而可以有效减小信道快衰落带来的不利影响,显著地降低了DDSTC性能曲线中的平台.仿真结果表明,在发射功率为30 dB时,RFL-DDSTC方案可将DDSTC的误码率平台降低一个数量级以上.     

洛河中游河岸带不同生境类型中物种多样性研究

为研究河岸带植被不同生境类型中物种多样性变化格局,在洛河中游沿河岸带通过样地调查,采用Patrick丰富度指数(R)、McIntosh均匀度指数(E)、Simpson优势度指数(C)、Shannon-Wiener多样性指数(H)、Simpson多样性指数(D)对洛河中游河岸带不同生境类型(河滩、农田、撂荒地和林地)草本层的物种多样性进行评价,利用重要值对多样性指数中的Ni进行无偏估计.结果表明:洛河中游河岸带植物种类丰富,有33科,97属,141种,分布最多的为菊科,其次是禾本科.沿洛河河岸带不同生境类型中,物种多样性各项指标有一个明显的变化格局:丰富度指数中,河滩>林地>撂荒地>农田;多样性指数(Shannon-Wiener多样性指数和Simpson多样性指数)中,河滩>林地≈撂荒地>农田;农田均匀度最高,且优势度也最高.     

结合空时分组码和机会调度的多用户MIMO系统容量分析

为了充分利用多用户多输入多输出系统(MU-MIMO)中固有的多用户分集,采用机会调度方案,同时为了有效利用空间分集增益和编码增益,应用空时编码理论抵抗多径衰落和提高系统的性能.在瑞利信道下给出了一种结合空时分组码和机会调度的方案并对其进行了容量分析.基于多项式展开的方法,推导了理想和非理想信道估计时的信道容量的封闭表达式、上界值以及高信噪比和低信噪比时的渐近表达式,并分析了不同信道估计时的容量比.此外,分析了基于空间和多用户分集的遍历容量改善.通过相应的数值计算和蒙塔卡罗仿真很好地验证了理论分析的正确性,并表明：多用户分集提高了该方案的性能,而信道估计误差的存在却引起了信道容量的损失;在不同信噪比区域,遍历容量可用相应的渐近表达式来近似.     

赣江上游流域丰水期大型底栖动物群落的分布特征

2009年6—7月间从赣江上游流域的70个采样点共采集到大型底栖动物33种,其中软体动物门23种、环节动物门7种、节肢动物门3种,主要优势种为河蚬(Corbicula fluminea)和耳型河螺(Rivularia auriculata).为了较好地了解大型底栖动物的群落分布特征,根据支流汇流和生境状况,将上游流域划分成6个区域.对6个区域的多样性、多维尺度等的分析结果表明,不同区域间大型底栖动物的群落结构组成存在明显差异,其中受人为扰动最小的区域采集得到的底栖动物种类数最多,丰度和生物量最高,Shannon-Wiener多样性指数和Pielou均匀度指数均处于最高水平.     

中国多民族文学的跨界研究

文章以国家社科基金重大项目《中国多民族文学的共同发展研究》的研讨为话题,阐述了在国家日益重视中华文化之多元性与差异性的语境下,研究多民族文学的共同发展具有重要意义。描述了该项目的立项背景,并结合项目开题报告和专家评审,分别对＂多民族文学＂与＂共同发展＂两个关键词展开讨论,指出该课题采取的跨界与整合的研究方法以及提出＂共同发展＂的文化关系,可望为目前处于转折与瓶颈阶段的中国民族文学研究提供新的视野。