金庸武侠小说“侠客”形象之异变

金庸武侠小说研究成为时下的热门课题，在其十五部作品中，从陈家洛、郭靖到萧峰，再到令狐冲、杨过，最后通过韦小宝，展示了金庸武侠小说中“侠客”的形象在不断地发生着变化———从“侠之正”到“侠之变”再到最后的“侠之反”。     

60Co-r射线辐射保持系嘉浙B的M2代突变类型分析

用60 CO-r射线直接辐射保持系嘉浙B诱发突变 ,M2 代出现多种变异 ,按变异频率大小从高到底依次为 :叶色突变>早熟突变 >颖尖不退花突变 >高外露率突变 >薄颖壳突变 >花时早 >突变紫稃尖突变 >迟熟突变 ,上述 8个选择项的总突变频率达到 2 .4 19% ,说明辐射诱变改良保持系性状十分有效     

Choosing summary statistics by least angle regression for approximate Bayesian computation

Bayesian statistical inference relies on the posterior distribution. Depending on the model, the posterior can be more or less difficult to derive. In recent years, there has been a lot of interest in complex settings where the likelihood is analytically intractable. In such situations, approximate Bayesian computation (ABC) provides an attractive way of carrying out Bayesian inference. For obtaining reliable posterior estimates however, it is important to keep the approximation errors small in ABC. The choice of an appropriate set of summary statistics plays a crucial role in this effort. Here, we report the development of a new algorithm that is based on least angle regression for choosing summary statistics. In two population genetic examples, the performance of the new algorithm is better than a previously proposed approach that uses partial least squares.     

改进离散人工蜂群算法规划异形满版服饰图案切割路径

服饰图案切割路径规划是服饰图案自动切割技术的关键部分之一。文中用改进的离散人工蜂群算法实现了激 光切割系统对异形满版服饰图案的切割工艺路径规划优化。首先,把满版服饰图案激光切割路径规划转化为广义旅行 商问题求解,证明了路径规划转化成普通TSP问题比转化成第一类广义TSP问题更为有效,并给出了路径规划中“图案 始切割点”的优化选择方法。然后结合部分匹配交叉和启发式变异搜索方法的人工蜂群算法求解TSP问题,证明了与 A*算法及遗传算法相比,该方法更为优越。并且该方法已应用于激光切割机切割异形满版服饰图案路径规划的生产实 践,运行可靠,比未规划时的工艺路线平均提高效率33.7%。该方法提供了一种解决TSP问题的新方法,具有一定的理 论意义和价值     

"原创性"文化的特征与构成——鲁迅、卡夫卡文学创作比较谈

鲁迅是中国新文化运动的旗手,卡夫卡被称为“欧美现代派文学之父”,他们各以其鲜明的原创性在中西现代文学史上起到了奠基和引路作用。本文通过对两位作家文学观念、创作主题、艺术方法诸问题的比较,探究其原创性文化的成因,为当今文学的发展提供借鉴之处。     

基于突变理论的铀矿山循环经济发展水平评价

铀矿山循环经济发展是铀矿开采的必然选择,铀矿山循环经济发展水平评价是检验和预测循环经济发展状态的判断依据。基于突变理论的改进的突变评价方法,构建了铀矿山循环经济发展水平的评价指标体系,并选取我国核工业某矿冶局所属的5个铀矿山作了铀矿山循环经济发展水平评价的实证分析。实证分析表明了该方法的可行性、有效性和可靠性。这对于铀矿企业处理资源有效利用和环境保护问题,实现经济效益和社会效益协调统一具有理论和现实意义。     

女性语体标准性趋向的理论阐释

拉波夫的经典语言变异研究表明,女性比男性更倾向于使用标准语体。此后,这一论断得到了包括特鲁吉尔和米尔罗伊在内的众多社会语言学家的证实。本文着重介绍了三种具有代表性的理论阐释,以便为进一步探索这一现象背后的社会和心理机制提供借鉴。     

儒家论礼的传承与变易——从礼学视野看原始儒学之精义

中国文化得以绵延不断的内在精微动力之一,即是贯穿于其中的对传统文化的传承意识与创新精神之紧密结合。儒家在阐释夏商周之礼时认为礼既有传承性,又有变易性;礼不仅会历时而变,而且可以应时权变,本来具有规范性、标准性的礼可以随天时、顺人情、适境遇而产生共时之变。兼顾礼的传承与变易,是贯穿于儒家礼学的重要思想原则,也是原始儒学的精义之一。儒家的这种学术精神对今人如何对待文化遗产有宝贵的借鉴意义。     

非平稳时间序列外生性结构突变检验设计的一个实例

一、引言由于世界经济结构的剧烈动荡,如金融危机、政策变更等,致使经济时间序列中的结构突变时有发生,经济过程的结构突变会影响协整分析的结果,使协整方法论中许多有代表性的检验失去原有的功效,如单位根检验[单位根可能会发生漂移(特征根的取值不稳定),单位根检验统计量也可     

Estimation of the mutagenic potency of environmental chemicals using short-term bioassay

The Ames Salmonella test is a widely used bioassay method for assessing the mutagenic potency of a potential carcinogen. The test is quick and reliable, and exploits the correlation that exists between mutagenic potential and carcinogenic potential. The data for this case study came from an international study involving 20 laboratories in nine countries. The laboratories participated in a designed experiment in which substances (complex chemical mixtures of the type encountered in the environment) were evaluated for mutagenicity using the Ames test. A stringent protocol was followed. The study's principal aim was to investigate intra- and inter-laboratory variation in test results. The data consist of counts of revertant Salmonella colonies at each of six dose levels of a substance. The data were obtained for each of five test substances from each participating laboratory. The bioassays were carried out according to a prescribed factorial experimental design. Three sets of analysts participated in this case study. They were asked to model the dose-response relationship for two substances, to develop an index of the strength of the relationship, and to assess intra- and inter-laboratory variation in bioassay results.