A short historical account of period doublings in the pre-renormalization era

I will shortly review the history of experimental and theoretical findings on period doubling until the discovery of the quantitative universal properties of the infinite period-doubling cascade.     

王昌龄开元年间仕履新考辨

王昌龄开元年间初仁宦迹，史料记载语焉不详，今人考订又多分歧。通过对唐代选举制度及相关诗文钩稽，辩证，对王昌龄这段经历予以考订，昌龄开元十五年进士及第，通过关试进入守选，曾于当年五月参加制举而来中，开元十九年与二十二年两中宏词，分别被授予校书郎和汜水尉，而后职是开元二十三年春授的。     

线性递归序列模q

设{u_k}_k≥0为一个线性递归序列．序列{u_k(mod q)}_(k≥0)是周期的,很多人都对其周期有过研究．本文应用二次数域中理想的理论,较完全地刻面了二次线性递归序列模q的周期长度,所获结果加强并推广了Engstrom及Wall的结论．     

浅谈春秋战国时期龙的观念

春秋战国时期是中华文化史上的“轴心时代”。在这一时期,中国龙的形态和观念都发生了引人瞩目的变化,特别是龙的观念由具体表象层次开始走向抽象象征层次,最终结晶定型于《易》传中。     

清末民初"废庙兴学"的历史人类学考察

清末民初,伴随着中国文化及乡村教育现代化的步伐,中国乡村社会曾兴起一股"废庙兴学"之风。其最初只是一种有知之士个人在民间的自发行为;清末新政将其作为教育改革的重要内容,在全国广泛推行(实际上只是部分地区执行);民国初年,"废庙兴学"进入了一个高潮期,对推进乡村教育发挥了一定作用,但遇到了宗教文化和乡村传统势力等重重阻力。"废庙兴学"是一个多面体,它既有促进国民教育、提高民众教育程度的积极作用,又扩大了我国民间宗教文化自身的影响,加强了宗教文化的发展与壮大;也可能成为激化民众社会矛盾、危害国民教育的有效实施,其消极影响不可低估。     

Element determination in medieval soil samples by total reflection X-ray fluorescence analysis

An aqua regia extraction procedure for heavy metals in soils optimised for total reflection X-ray fluorescence analysis is presented. The procedure is applied to 92 soil samples of medieval layers from the city area of Dortmund. Sixteen elements (P, S, K, Ca, Ti, Cr, Mn, Fe, Ni, Cu, Zn, Rb, Sr, Ag, Sn, and Pb) were used to characterise 17 sample sites. The results are projected onto the medieval urban structure of Dortmund. Two sites loaded with non-ferrous heavy metal could be detected and correlated with archaeological data. The efficiency and repeatability of the proposed extraction procedure is discussed.     

Impact of the closure of Indonesian seaway on climate: A numerical modeling study

Using a global OGCM and its relevant coupled ocean-atmosphere GCM with the contemporary, 6 MaBP and 14 MaBP oceanic topography, respectively, a series of numerical experiments are implemented in order to investigate the effect of the north shift of Australian continent on the tropical oceanic circulation, especially the formation of the western Pacific warm pool. The numerical experiments of the individual OGCM forced by the modern atmospheric circulation indicate that the closure of Indonesian passage results in warming in the tropical Pacific Ocean and cooling in the tropical Indian Ocean; furthermore, it also results in change in source of the Indonesian Through Flow (ITF) water, e.g. ITF mainly originates from the south Pacific at 14 MaBP, but it mainly originates from the north Pacific now. The coupled model shows similar results as the individual OGCM qualitatively.     

民国前期关中地区水利纠纷的特征及原因分析——基于《陕西水利月刊》中18起水案的分析

近代以来,关中地区的水资源短缺,农田水利纠纷已成为当时的社会问题之一。通过对民国《陕西水利月刊》中记载的18起水案分析,认为民国前期该地区的水利纠纷频繁发生,具有明显的时空特征。其原因与当时自然降水量不均、农田水利的分布及灌溉条件、新旧用水制度交替、民众的生存压力、不科学的灌溉意识等有密切关系。     

低渗温热腹腔灌注化疗治疗恶性腹腔积液的临床研究

目的 评价低渗温热腹腔灌注化疗治疗恶性腹腔积液的疗效及不良反应。方法 行腹腔穿刺置单腔中心静脉导管,外接引流袋,记录腹水引流量,当日排放腹水1 500ml 后,予加热至43~45℃注射用双蒸馏水1 000ml 行腹腔灌注,次日重复放液1 500ml,再予加热至43~45℃注射用双蒸馏水1 000ml 行腹腔灌注,并于灌注后腹腔注入顺铂60mg、氟尿嘧啶500mg 并封管,治疗期间常规给予简单水化、对症止吐等治疗。结果 31 例恶性腹腔积液患者共完成低渗温热腹腔灌注化疗42 周期,完全缓解7例,部分缓解15,稳定5 例,进展4 例,完全缓解+ 部分缓解占70.97%。中位进展时间（TTP）3.6个月（2～9 个月）, 中位生存期（MST）5.6 个月。毒副反应以消化道反应为主。结论 低渗温热腹腔灌注化疗治疗恶性腹腔积,在延长患者的生存期、提高生活质量方面效果较好,临床上可推荐应用。     

Low temperature synthesis and luminescence investigations of YAG:Ce,Eu nanocomposite powder for warm white light-emitting diode

The preparation of the cerium and europium co-doped YAG materials as well as the study for their synthesis and emitting mechanism of the energy transfer between Ce³⁺ and Eu³⁺ were investigated in the present study. YAG:Ce³⁺, Eu³⁺ powders were synthesized using a high-energy ball milling method in different sintering temperature and atmosphere: air and H₂/N₂. The effects of the synthesis procedure on the crystallinity, morphology, structure, and luminescence spectra were examined by X-ray diffraction, field emission-scanning electron microscopy, and photoluminescence spectroscopy. The europium co-doped YAG:Ce³⁺ phosphors is improved the chromaticity coordinates.