γ辐照Al~(3+):α-石英晶体的光吸收谱及其GOW心的色心电子能态

本文用水热法生长了Al~(3+):α-SiO_2石英晶体,测量了γ射线辐照赋色的晶体的吸收光谱。主要的可见吸收带位于2、61ev,2.07ev和2.30ev处。其中2、6ev和2、07ev吸收带是GOW心(即〔Al_(e+)〕°心)产生的色心吸收带。本文理论上计算了GOW心的电子能态。对应该心两个吸收带的理论值分别位于2、72ev和1.94ev与实验结果相符。     

浅谈《青史演义》对儒家思想的吸收与借鉴

《青史演义》是尹湛纳希的代表作,开蒙古族长篇小说之先河。作者在本民族文化土壤上大量吸收和借鉴汉族传统文化,特别是吸收和借鉴儒家思想,以儒家的"礼"来规范13世纪的蒙古族社会;以"孝悌"、"信义"等思想来规范当时人际关系;受君权神授思想的影响,神化真龙天子意象,形成神圣和谐的宫廷龙凤意象。这不仅显示作家的时代理想,同时也促进了蒙汉文化交流的发展进程。     

不同体系下亚甲蓝聚合状态的光谱研究

应用吸收光谱法研究了亚甲蓝在不同浓度时以及添加不同浓度十二烷基硫酸钠时的聚合状态的变化,探讨了亚甲蓝与十二烷基硫酸钠之间相互作用机理,同时考察了乙醇、NaCl、羟丙基-β-环糊精以及Triton X-100对亚甲蓝聚合状态的影响。结果表明亚甲蓝溶液浓度和溶剂对亚甲蓝的聚合状态都有影响。     

储光羲田园诗对陶渊明田园诗的吸收和创新

本文的田园诗主要指描写农村的田地、园圃、人事风物的诗歌。储光羲是盛唐最重要的田园诗人之一,他的田园诗有他自己的特点,在写作内容、写作对象、生活情趣、对农民态度以及艺术风貌等方面都有对陶渊明的吸收,并有创新处,使田园诗更有田园美和人情味。     

First hitting probabilities for semi-Markov chains and estimation

We first consider a stochastic system described by an absorbing semi-Markov chain (SMC) with finite state space, and we introduce the absorption probability to a class of recurrent states. Afterwards, we study the first hitting probability to a subset of states for an irreducible SMC. In the latter case, a non-parametric estimator for the first hitting probability is proposed and the asymptotic properties of strong consistency and asymptotic normality are proven. Finally, a numerical application on a five-state system is presented to illustrate the performance of this estimator.     

螯合树脂富集—AAS测定水中六价铬、总铬的研究

树脂富集——AAS法对水中六价铬、总铬的测定消除了二苯碳酰二肼分光光度法的测定干扰和化学试剂不稳定的问题,称取2.5g干重树脂装填充到　ф8×70mm离子交换树脂柱内,用1.5mol/L　HNO3洗脱后直接进入原子吸收光谱仪测定,方法的检出限0.002mg/L,精密度 RSD小于3%,操作简便,易于推广。     

Dermal Uptake of 18 Dilute Aqueous Chemicals: In Vivo Disappearance‐Method Measures Greatly Exceed In Vitro‐Based Predictions

Average rates of total dermal uptake (K_up) from short‐term (e.g., bathing) contact with dilute aqueous organic chemicals (DAOCs) are typically estimated from steady‐state in vitro diffusion‐cell measures of chemical permeability (K_p) through skin into receptor solution. Widely used (“PCR‐vitro”) methods estimate K_up by applying diffusion theory to increase K_p predictions made by a physico‐chemical regression (PCR) model that was fit to a large set of K_p measures. Here, K_up predictions for 18 DAOCs made by three PCR‐vitro models (EPA, NIOSH, and MH) were compared to previous in vivo measures obtained by methods unlikely to underestimate K_up. A new PCR model fit to all 18 measures is accurate to within approximately threefold (r = 0.91, p < 10^?5), but the PCR‐vitro predictions (r > 0.63) all tend to underestimate the K_up measures by mean factors (UF, and p value for testing UF = 1) of 10 (EPA, p < 10^?6), 11 (NIOSH, p < 10^?8), and 6.2 (MH, p = 0.018). For all three PCR‐vitro models, log(UF) correlates negatively with molecular weight (r² = 0.31 to 0.84, p = 0.017 to < 10^?6) but not with log(vapor pressure) as an additional predictor (p > 0.05), so vapor pressure appears not to explain the significant in vivo/PCR‐vitro discrepancy. Until this discrepancy is explained, careful in vivo measures of K_up should be obtained for more chemicals, the expanded in vivo database should be compared to in vitro‐based predictions, and in vivo data should be considered in assessing aqueous dermal exposure and its uncertainty.     

抗日战争时期中国共产党对西方民主的借鉴

1941年下半年苏德战争、太平洋战争相继爆发,第二次世界大战全面展开,中国抗日战争也进入到中后期.在这个新阶段,中国内外形势发生了重大变化.国际上,世界反法西斯统一战线最终形成,关、英等西方大国开始大量对华援助,逐渐加深了他们在华政治影响;国内,城市中、小资产阶级政治团体不断成立,威胁到国民党的统治,这些团体大都亲近西方民主,不赞成苏联的社会制度.为更好地领导抗日战争,中国共产党对西方民主的某些原则、制度和实践加以借鉴,使之成为适合中国国情、富于战斗力的政治武器,以反对国民党"一党专政",争取广大人民支持,从而丰富、发展了新民主主义理论.     

吸附对气藏及凝析气藏储量的影响探讨

将化工中的可动吸附模型^[1]应用于气藏工程中,建立考虑吸附的原始地质储量的理论模型。首先对化工中分子筛上的单组分吸附实验数据进行了拟合,在此基础上对双组份吸附的实验数据进行了预测,通过和实验数据的对比分析,验证了本模型的可靠性;然后采用Clark^[2]在砂岩及砂岩-粘土多孔介质中测得的单组分吸附实验数据和单组分吸附延伸扩展方法,获得了其它单组分的吸附扩展实验数据和基础吸附参数,应用此参数分别对实际的天然气和凝析气在不同多孔介质中的吸附进行了计算。通过计算说明不同介质及不同体系组成的气藏在原始条件下考虑吸附对常规地质储量产生的影响程度。     

原子吸收光谱分析法的应用

用原子吸收光谱分析方法对妊娠中后期妇女头发中钙、锌、铜、铁元素的含量进行测定，其结果与未孕妇女进行比较，发现除铜元素外，铁、锌、钙含量均有明显差异．同时探讨了上述元素与胎儿生长发育及母体健康状况的关系．