二项分布下的一种贝叶斯可靠性验收试验方案

为了合理利用先验信息制定可靠性验收试验方案，以降低验收试验的费用，在进行可靠性定型试验的前提下，提出了一种先验信息加工方法，并根据生产与使用双方实际所关心的风险意义，制定了产品可靠性验收试验的一种贝叶斯方案。算例结果证实，该方案在保证了生产方与使用方利益的前提下，减少了试验量，降低了验收试验费用。说明所提出的先验信息利用方式是有效的。     

关于k-广义酉矩阵

本文研究了k-广义酉矩阵的性质及其与酉矩阵、辛矩阵、Householder矩阵之间的联系,取得了许多新的结果,推广了酉矩阵及Householder矩阵的相应结果,特别将正交矩阵的广义Cayley分解推广到了广义酉矩阵上;并将各类酉矩阵及辛矩阵统一了起来.     

Effect of Notoginsenoside- Rg1 on the Expression of Several Proteins in the Striatum of Rat Models with Parkinson''s Disease

After establishing hemi-Parkinsonian rat models, the relationships between neuron death and the expression of several proteins, such as c-Fos, GFAP, GDNF, NF-κB and some cytokines were determined. Therapeutics experiments with notoginsenoside-Rg1 were carried out. The research results show that the expressions of GFAP, NF-κB and c-Fos will obviously increase in the lesion side of the striatum and the expression of GDNF will decrease, which implies that the signal transduction pathway may participate in the apoptosis in neurons. The levels of some cytokines such as TNF-α, IL-1β in the striatum of PD rat models increased compared to those of normal rats. The results of the therapeutics experiments show that notoginsenoside-Rg1 may repress the immune inflammation response and regulate the immune function through the neuro-immune molecular network. Therefore, notoginsenoside-Rg1 can be used as an effective drug for anti-oxidation and anti-inflammation, and can be used in the therapy of Parkinson's disease(PD).     

An类自入射代数的不可分解模由其Loewy因子唯一确定

本文对An类有限表示型自入射代数证明了每个不可分解模由其Locwy因子唯一确定,并且每个不可分解模都是多重自由的。作为对群表示论的一个应用,亏数群为循环群的块的每个不可分解表示由其Loewy因子唯一确定,并且是多重自由的。     

用三源热共蒸法制备的二十厘米长涂层导体及其显微结构

用真空三源热共蒸发法制备了二十厘米长的涂层导体,其宽度为1厘米, 超导层宽度为0.9 厘米,厚度为600纳米.使用直流四引线法测试,导体在77K时的临界电流大于120安培,相应的临界电流密度大于每平方厘米220万安培.表征电流-电压曲线超导转变陡峭度的n值为35.显微结构观察表明其膜层显微形貌与单晶衬底上的薄膜极其相似.X射线衍射研究表明超导薄膜的相成分纯,面内FWHM为Δφ=6.23°,面外FWHM为Δω=3.84°,表明涂层的优良织构.在此文章将详细报告导体的制备和显微结构及物理测试结果.     

可回溯点跟踪包含配选法印刷汉字识别

在汉字识别的包含配选法、双重包含配选法以及点跟踪包含配选法的基础上,提出了一种新的汉字识别的方法——可回溯点跟踪包含配选法。本文论述了该方法的基本原理及用此方法,在C1000光导摄象机与HP-9000小型机所组成的图象处理系统上,对4种印刷汉字的识别实验,其结果表明这种识别方法设计合理,具有较强的适应能力。     

Radiobiological response of human hepatoma and normal liver cells exposed to carbon ions generated by Heavy Ion Research Facility in Lanzhou

Human hepatoma and normal liver cells were irradiated with ¹²C⁶⁺ ion beams (LET = 96.05 keV/μm) and γ-rays at Heavy Ion Research Facility in Lanzhou (HIRFL). The chromatid breaks and break types were detected using the premature chromosome condensation technique. Our experimental results showed that chromatid breaks seem to have a good relation with ¹²C⁶⁺ absorbed dose and ¹²C⁶⁺ are more effective to induce chromatid breaks as compared to the γ-rays. For ¹²C⁶⁺ ion irradiation the major break was isochromatid break, while chromatid breaks were dominant for γ-ray irradiation. We also observed that the Relative Biology Effectiveness (RBE) of ¹²C⁶⁺ ion is about 2.5 times higher than that of γ-rays.     

描述低周疲劳裂纹扩展速率的循环J积分新参量

探讨了低周疲劳加载条件下的应力增量．应变增量关系，提出了模拟裂纹疲劳扩展的二维模型以建立新的循环．积分参量，详细阐述了该积分参量的定义、主要特点、物理意义以及数值计算方法，并通过紧凑拉伸试样的疲劳试验检验该积分参量的有效性．结果表明：该积分参量能够较好描述恒幅低周疲劳裂纹的扩展速率．此外，基于积分参量体系，从能量的角度解释了疲劳迟滞现象．     

分离作用RFQ加速器物理特性的研究

RFQ加速器中加速效率随加速能量的增高而下降,为克服由此导致的RFQ能量局限而提出的分离作用RFQ加速结构,在仍保持采用射频四极场聚焦的同时,将加速与聚焦作用相分离. 综述了对它的加速效率、反场问题、腔体及束流特性研究 的结果,初步证实了其可行性及在较高能量区加速效率得到提高,并对正在研制的一台采用了这种分离作用RFQ的1.5MeV组合加速器做了介绍.     

Photochemically Catalyzed Diels-Alder Reaction of Azadienes with 2,3-Dihydrofuran by 2, 4, 6-Triphenylpyrylium Salt： Synthesis of Styrylfuroquinoline Derivatives

Photochemically promoted Diels-Alder reactions of 1, 4-diaryl-1-azabutadienes with 2,3-dihydrofuran were achieved by using 2, 4, 6-triphenylpyrylium tetrafluoroborate as catalyst to produce corresponding styrylfuroquinolines in high yield.