浅析默念训练

为心理训练领域中的一个新课题，默念训练已经被世界许多国家日益重视起来，也已为当今上的许多运动员所成功运用，尤其是在技术性强的竞赛项目中。默念训练就是运动员在训练时成功地完成正确技术动作的一种自我设要想。     

Study on the Reliability Evaluation of Qualitative Indices in Multi-Objective Decision

Qualitative indices in multi-objective decision can usually be evaluated and measured by mathematical methods or models, but the obtained results are sometimes inaccurate because of fuzziness of indices. To improve the accuracy and reliability of the evaluation results, set-value statistic principle is applied, and accordingly four evaluation methods are obtained. Meanwhile, these methods are compared briefly.     

1994年计算机软件技术资格水平广西成绩统计

阐述１９９４年中国计算机软件专业技术资格和水平考试广西考区成绩统计。文章用表格来分析论述了初级程序员、程序员和高级程序员各级别的考试结果。     

在列率域上的特征函数

在随机系统的分析中,许多问题可以借助特征函数得出简单的解法。本文是模拟 Fourier分析,引出 Walsh(沃尔什)分析。首先引入二进导数的概念,并用数学期望的概念来定义 Walsh 特征函数,对所对应的 Walsh 特征函数,经过 Gibbs 导数运算子,导出了矩的概念和性质,而且介绍了矩的计算法。同时也导出了研究函数的二进(逻辑)导数的 Walsh 变换结果。本文仅对一个随机变量的情况进行研究。     

滴流床反应器的持液量

本文提出用E=(ρLgε~2)/(ρLgε~2)对文献及本实验静持液数据进行关联;在受力分析基础上得到单相持液的半经验关系.使关联式使用范围及精度比文献值有所提高.形式亦较为简洁。对冲脉区后的动持液量提出了单独的经验关联。     

低速稳定传播火焰产生的弱冲击波解

低速稳定传播火焰产生弱冲击波后的流场是自相似的，相平面守恒方程的奇异点Ｚ＝０、Ｆ＝１对应冲击波马赫数为１．本文用自适应步长的四阶Ｒｕｎｇｅ－Ｋｕｔｔａ法对相平面的控制方程积分，求得弱冲击波后流场参数分布，与声波方法得到的结果相比，在低速稳定传播火焰的条件下，两者结果完全吻合，克服了前人在该条件下所得结果的不相容性．     

SYCY-86型实时处理瞬变光源颜色测定仪

介绍了SYCY-86型实时处理瞬变光源颜色测定仪的设计思想和工作原理.     

有机萃取相中Eu(Ⅲ)的配位层结构

本文利用Ｅｕ（Ⅲ）在有机萃取相中，５Ｄ０→７Ｆ２５Ｄ０→７Ｆ１两个跃迁的荧光峰高及比值作为研究Ｅｕ（Ⅲ）配位层组成和结构的探针。研究了ＴＢＰ，ＤＢＰ，Ｐ２０４与Ｐ５０７等４种有机磷萃取剂和Ｅｕ（ＣｌＯ４）３，Ｅｕ（ＮＯ３）３两种铕盐水溶液的萃取物的荧光光谱。发现萃取剂直接取代内配位层中水的能力不强，在萃取物中很可能形成外配位层，表现为荧光受到内层水分子的强烈猝灭。利用阴离子对Ｅｕ（Ⅲ）亲和力的差别，用ＮＯ３－先行取代或从有机萃取物中取代内层的水分子，可观测到荧光的明显增强，表明内配位层［组成与结构的变化。这一现象有可能用作改进萃取剂设计和萃取工艺时的参考。     

Resurrecting ancestral alcohol dehydrogenases from yeast

Modern yeast living in fleshy fruits rapidly convert sugars into bulk ethanol through pyruvate. Pyruvate loses carbon dioxide to produce acetaldehyde, which is reduced by alcohol dehydrogenase 1 (Adh1) to ethanol, which accumulates. Yeast later consumes the accumulated ethanol, exploiting Adh2, an Adh1 homolog differing by 24 (of 348) amino acids. As many microorganisms cannot grow in ethanol, accumulated ethanol may help yeast defend resources in the fruit. We report here the resurrection of the last common ancestor of Adh1 and Adh2, called Adh(A). The kinetic behavior of Adh(A) suggests that the ancestor was optimized to make (not consume) ethanol. This is consistent with the hypothesis that before the Adh1-Adh2 duplication, yeast did not accumulate ethanol for later consumption but rather used Adh(A) to recycle NADH generated in the glycolytic pathway. Silent nucleotide dating suggests that the Adh1-Adh2 duplication occurred near the time of duplication of several other proteins involved in the accumulation of ethanol, possibly in the Cretaceous age when fleshy fruits arose. These results help to connect the chemical behavior of these enzymes through systems analysis to a time of global ecosystem change, a small but useful step towards a planetary systems biology.     

Particle methods for multiscale simulation of complex flows

The multi-scale structures of complex flows have been great challenges to both theoretical and engineering researches, and multi-scale modeling is the natural way in response. Particle methods (PMs) are ideal constitutors and powerful probes of multi-scale models, owing to their physical insight and computational simplicity. In this paper, the role of different PMs for multi-scale modeling of complex flows is critically reviewed and possible development of PMs in this background is prospected, with the emphasis on pseudo-particle modeling (PPM). The performances of some different PMs are compared in simulations and new development in the fundamentals and applications of PPM is also reported, demonstrating PPM as a unique PM for multi-scale modeling.