AMSAA-BISE模型及其统计推断

本文将AMSAA模型推广到多台系统同步开发的可靠性增长试验的情况,所以,命名为AMSAA-BISE~2模型。文中对定数及定时截尾数据给出了Weibull过程参数的极大似然(ML)估计和无偏估计,系统达到MTBF的置信区间和拟合优度检验方法。     

某些高阶抛物方程解的极值原理与爆破

本文用L_2模形式的辅助积分以极值原理探讨某些高阶抛物方程的零解与其解的爆破。我们获得了类似于文[4]中的某些新结果其次又提到了某些非线性Schrodinger型方程解的爆破。主要结果是定理2——4。     

CeNi5—xCux吸氢性能研究

样品在氩气氛下采用高频感应炉制备,所有样品经过均匀化热处理。在20,40和60℃下测量CeNi_(5-x)Cu_x饱和吸氢量,吸氢动力学曲线和放氢曲线。 在20和40℃,CeNi_3Cu_2压力一组成等温图中有较宽和明显的平台压力区,吸、放氢速度较快。若用Cu取代CeNi_5中部分Ni则成本可有所降低。CeNi_3Cu_2是很有发展前途的贮氢材料。CeNi_5和CeNi_4Cu在相同条件下不具有吸氢性能。CeNi_(5-x)Cu_x具有CaCu_5结构。     

THE CONNECTIVITY OF MAXIMUM MATCHING GRAPHS

The maximum matching graph of a graph has a vertex for each maximummatching and an edge for each pair of maximum matchings which differ by exactly oneedge. In this paper, we prove that the connectivity of maximum matching graph of abipartite graph is equal to its minimum degree.     

一类短期利率模型的最优估计、选择与定价应用

对CKLS的一般无约束模型进行了推广,提出了两个更为一般的无嵌套短期利率模型,并以中国银行间债券市场国债回购利率R007的日数据为样本,对这两个模型以及可嵌套在CKLS框架下的GBM模型、Vasicek模型和CIR SR模型的欧拉离散化形式进行了极大似然估计（MLE）.在此基础上,采用对数似然比和Vuong检验统计量,对它们的模型拟合效果进行了比较,结果表明对CKLS模型推广的第二种形式（模型5）优于其他四个模型.然后,又利用间接推断方法对模型5估计得到的初始参数值的偏差进行校正,并将修正后的参数估计值及其短期利率扩散模型用于对某上市公司的股票看涨期权进行定价.     

模糊推理的模糊熵三I算法及其还原性

讨论FMP问题的模糊熵三I算法解的存在条件,研究了三I解与模糊熵三I解的关系,获得了模糊熵三I算法的一般计算公式,并给出了几个重要蕴涵算子的模糊熵三I算法公式,证明了这些算法在一定条件下是还原算法.     

Imprint of solar activity on Nanjing stalagmite annual layer thickness sequence during the Last Glacial Maximum

PREVIOUS STUDIES ON ANNUAL GROWTH LAMINAE IN STA-LAGMITES SUGGESTED THAT IT IS A USEFUL PROXY TO INVESTI-GATE ANNUALLY HIGH-RESOLUTION CLIMATES[1―4].THE VARIA-TION OF ANNUAL LAMINAE THICKNESS HAS BEEN EXPLAINED AS REFLECTING SEASONAL CHANGES EITHER IN DR…     

扩程电阻的误差分析

本文利用误差理论导出了扩程电阻的误差表达式，并对扩程电阻的误差与各物理量的关系进行了分析，寻找出了规律。对误差的来源以及大小从理论上得到了明确的解释。     

A palynological and palaeoclimatological record from the southern Philippines since the Last Glacial Maximum

A palynological analysis of a marine sediment core in the southern Philippines,provides a detailed regional vegetation and climate history for the West Pacific Warm Pool(WPWP)since the Last Glacial Maximum(LGM).Chronology was determined by a detailed oxygen isotope record.A higher representation of pollen from tropical upper montane rainforest during the LGM indicate that this forest type moved down along elevation,probabaly due to the lowered temperature.During the last deglaciation and the early Holocene,mangroves were more expanded and tropical mid and upper montane rainforests were restricted,suggesting a rising sea-level and temperature increase.Herbaceous pollen and pteridophyte spore records indicate a much drier condition during the LGM than the Holocene.Mangrove development is controlled by conditions at the river mouth influenced by river discharge.Pteridophyte spores are abundant in wet conditions and are mainly transported by rivers.During the mid-Holocene,the reduction in mangrove pollen and pteridophyte spore appears to be a result of climate change:mainly decrease in river discharge.This may have been affected by the decreasing intensity of the Southeast Asian Monsoon,and the increasing frequency and intensity of warm ENSO events,El Ni?o,in this region.     

抗战时期广西文化政策略论

抗战时期,广西新桂系当局实行了较为开明的文化政策,包括战时基本文化政策、文化宣传教育政策,新闻出版审查政策,文化娱乐管理政策,文化学术团体管理政策等。作为特定历史条件下的产物,抗战时期广西当局文化政策的制定,在一定程度上创造了有利于抗战文化发展的社会政治环境,繁荣了广西文化事业,推进了广西抗战文化的发展进程。