中华文明的绚丽曙光--论舞阳贾湖发现的卦象文字

文章通过对舞阳贾湖遗址发现的21个刻划符号的研究,认为其构形与商周甲骨金文相似。目前已认识的11个字,分别属于反映《离》、《坤》两卦之象的卦象文字,这说明中国使用至今的汉字,早在八千多年前就产生。     

论李维的历史方法

李维的历史方法是罗马传统历史方法的继承与发展。首先,他采用了逐年纪事的年代记的叙述方式。其次,他继承了罗马史学在其肇始就具有的爱国主义偏见和为罗马辩护的特点,特别是在对史料的处理方面,他按照爱国主义和道德教导的写作目的对史料进行删选,甚至伪造。最后,李维把文学技巧应用到历史写作之中。     

地理哲学研究若干问题刍议

本文论述地理哲学研究的重要性,介绍西方地理哲学的发展概况和研究动态,分析我国地理哲学研究落后的主要原因,对如何开展我国地理哲学研究提出一些建议。     

领导干部价值观的内涵阐释与科学创新

领导干部价值观是建立在世界观、人生观和行政价值观、政党价值观以及社会主义核心价值体系等理论基础上的。正确的领导干部价值观主要包括以人为本的理念、权为民所用的权力观、民主法治观和创新发展观。研究和分析领导干部价值观的基本内涵,树立正确的领导干部价值观,对于加强领导干部核心价值体系建设、加强和改善党的领导,具有重要意义。     

Dietary adaptation during the Longshan period in China: stable isotope analyses at Liangchengzhen (southeastern Shandong)

Rice and millet were staple crops at Liangchengzhen, a late Neolithic Longshan site in Shandong, China, but the degree of dietary variation is not known. This study uses stable isotope analysis of human and faunal skeletal remains to quantitatively address the importance of these crops as well as terrestrial domesticates and aquatic resources in the diet at Liangchengzhen. Although no collagen could be extracted from the poorly preserved human bones, the δ¹³C stable isotope results for 2 apatite sample and 16 tooth enamel samples averaged −9.8‰ suggesting that diet was based on foods averaging from −24‰ to −18‰, with millet and millet-fed animals comprising at most approximately 25–30% of the diet. Pig faunal δ¹³C isotope values suggested that during the earlier Longshan period pigs were fed mainly millet with more C₃ foods such as rice included by the later Longshan period. Solid ceramic residues from two guan jar sherds produced δ¹³C values averaging −18‰ and δ¹⁵N values averaging +16‰, suggesting both vessels contained fish. The results of the study indicate that by the Longshan period, people in southeastern Shandong no longer relied as heavily on millet and that the agricultural crop of rice had increased in importance at Liangchengzhen. Unfortunately, without human collagen samples to provide nitrogen isotope results, we cannot estimate the relative contribution of aquatic and terrestrial protein to the diet of people at Liangchengzhen. In general, however, the pattern of a diverse agricultural system on the basis of the macrobotanical remains from Liangchengzhen is supported by the isotopic results.     

Nonparametric Significance Test for Discovery of Network‐Constrained Spatial Co‐Location Patterns

Spatial co‐location patterns are useful for understanding positive spatial interactions among different geographical phenomena. Existing methods for detecting spatial co‐location patterns are mostly developed based on planar space assumption; however, geographical phenomena related to human activities are strongly constrained by road networks. Although these methods can be simply modified to consider the constraints of networks by using the network distance or network partitioning scheme, user‐specified parameters or priori assumptions for determining prevalent co‐location patterns are still subjective. As a result, some co‐location patterns may be wrongly reported or omitted. Therefore, a nonparametric significance test without priori assumptions about the distributions of the spatial features is proposed in this article. Both point‐dependent and location‐dependent network‐constrained summary statistics are first utilized to model the distribution characteristics of the spatial features. Then, by using these summary statistics, a network‐constrained pattern reconstruction method is developed to construct the null model of the test, and the prevalence degree of co‐location patterns is modeled as the significance level. The significance test is evaluated using the facility points‐of‐interest data sets. Experiments and comparisons show that the significance test can effectively detect network‐constrained spatial co‐location patterns with less priori knowledge and outperforms two state‐of‐the‐art methods in excluding spurious patterns.     

Modification of Ductility Reduction Factor for Strength Eccentric Structures Subjected to Pulse-Like Ground Motions

This article investigates the ductility reduction factors for RC eccentric frame structures subjected to pulse-like ground motions. The structural models are with the strength eccentricities which are much disadvantageous than the stiffness eccentricities during the inelastic response range. A method to determine the ductility reduction factors of the strength eccentric structures is suggested by modifying those of reference symmetric structures through an eccentricity modification factor. The four factors of strength eccentricity ratio, ductility ratio, story number and velocity pulse of ground motions, are investigated to gain insight into this modification factor. It shows that the ductility reduction factors of the eccentric structures are clearly smaller than those of the symmetric structures. The eccentricity modification factor is mainly affected by the strength eccentricity and the ductility ratio, decreasing with the increment of the eccentricity or the decrement of the ductility ratio in a medium eccentricity range. The earthquake pulse-like effect and the eccentricity have coupling influence on the modification factor, while the effect of story number is not apparent. Based on the results of a comprehensive statistical study a simplified expression is suggested, which can estimate the eccentricity modification factors for both pulse-like and nonpulse-like ground motion cases.     

互助:彩虹之约

很久很久以前,一块古老的土地上风妖逞凶,沙怪肆虐,聪明勇敢的土族青年李木端智,怀揣镇邪治沙、开辟良田的理想,远走北方去寻找神仙,讨教本领。千山万水的行程中李木端智遇到了美丽的天鹅仙女,结为夫妻的他们回到家乡后,共同制伏了风妖沙怪,开田耕耘。心灵手巧的天鹅仙女,在一块毯子上绣了一幅七彩图画:     

Ancient DNA provides new insights into the origin of the Chinese domestic horse

Domestic horses played a pivotal role in ancient China, but their exact origin remains controversial. To investigate the origin of Chinese domestic horses, we analyzed mitochondrial DNA (mtDNA) from 35 horse remains, aged between 4000 and 2000 years, excavated from nine archaeological sites in northern China. The Chinese ancient horses exhibited high matrilineal diversity, falling into all the seven haplogroups (A–G) observed in modern horses. These results suggest that several maternal lines were introduced into the gene pool of Chinese horses in the past. Haplogroups A and F were more prevalent in ancient horses than the other haplogroups. Interestingly, only haplogroups A and F were present in the samples older than 4000 years, while the more recent horses (between 2000 and 3000 years BP) fell into all seven haplogroups. Comparison with DNA data of present-day horses suggests that haplogroup F is like to be an ancient haplogroup of East Asian origin. These analyses also suggest that the origin of Chinese domestic horses is complex, and external mtDNA input occurred after initial domestication. Our results indicate that the Chinese ancient horses are more related to the modern Mongolian horses. Lastly, our results cannot support the previous hypothesis that early Chinese domestic horses were derived from the Przewalski horse.     

《西狭颂》摩崖现状考

东汉摩崖《西狭颂》与《都阁颂》、《石门颂》并称“汉三颂”。清末张祖翼提出近拓《西狭颂》笔画肥肿,神气索然,乃吴大敬剜洗所致,是说证据不足。然《西狭颂》摩崖“正文”、“文前题记”及文后第一行“题名”的确有刻洗迹象。《五瑞图》下题名第四行“记”字也系后人重刻,其重刊时间约在嘉庆十七年（1812）至道光二年（1822）间,《西狭颂》剜洗亦或同时。另外,《西狭颂》正文末“时府”二字,字形、刀法、位置均与整篇不和谐,当为摩崖刻竣后补刊。