基于抗原包被的微孔板式化学发光酶免疫分析法测定人尿中的雌三醇

将雌三醇-6-(O-羧甲基)肟(E3-6-CMO)与牛血清白蛋白(BSA)形成的偶联物E3-6-CMO-BSA物理吸附于聚苯乙烯微孔板孔内作为固相抗原,与雌三醇(E3)标准溶液或者水解尿样中待测E3通过竞争法进行免疫反应.以对碘苯酚增强的辣根过氧化物酶(HRP)催化鲁米诺-过氧化氢化学发光体系作为信号检测系统,建立了一种高通量、简便快速、灵敏稳定的化学发光酶免疫分析方法用于测定人尿中E3的含量.考察和优化了包被液的酸碱性、抗原包被浓度、酶标抗体稀释比例及用量、温育时间、化学发光底物用量及化学发光反应时间的影响.在最优实验条件下,方法的灵敏度为0.20ng/mL,批内和批间变异系数均在15%之内,低、中、高浓度加标水解尿样的平均回收率分别为107.9%、100.9%和91.2%.使用抗原包被法和抗体包被法同时对10份水解尿样进行测定,结果显示相关性良好,相关系数为0.9984,表明本方法可以满足临床检测的要求.     

基于结构函数方法的类星体证认

光变巡天是搜寻类星体的一个很有效的方法.应用归一化结构函数对SDSS stripe 82中存在光变的1411个类星体和174个恒星进行分类,选取幂函数模型拟合这些样本5个波段的结构函数.综合幅值和幂指数两个物理量设置了合适的分类判据,获得了比较理想的分类结果,类星体和恒星最高分类正确率分别达到了92.2%和83.6%.结果表明,改正后的结构函数对类星体的证认有很好的效果,能节约大型望远镜宝贵的观测时间,让类星体巡天获得比较高的观测效率.分析结论支持大部分类星体的光变缘于盘的不稳定性.     

Influence of Ga+ ion irradiation on the magnetisation reversal process and magnetoresistance in CoFe/Cu/CoFe/IrMn spin valves

Ga+ion irradiation is performed on the surfaces of IrMn-based spin valves and the effects of ion irradiation on the magnetisation reversal process and magnetoresistance(MR) are investigated.The results show that the exchange bias field and magnetoresistance ratio of the spin valve decrease with the increase of ion dose.The width of the forward step between the free layer and the pinned layer becomes gradually smaller with the increase of ion dose whilst the recoil step tends to be narrower with ion dose increasing up to 6×10 13 ions/cm 2 and the step disappears afterwards.Two peaks in the R-H curve are found to be asymmetric.     

高能闪光照相CCD接收系统辐射屏蔽实验研究

针对白斑噪声严重影响CCD图像质量的情况,用铜、铅作屏蔽材料分别进行了屏蔽效果实验,采用灰度区间分割方法对实验结果进行了数据分析。结果表明,经过铜和铅共同屏蔽后,白斑噪声降低了50%以上。     

新型指挥仪模拟器的分析与研究

针对美国6S04指挥仪模拟器中几种运动方式的输出波形,研究和分析了新型模拟器关于正弦、等速、方波、等速 方波以及阶跃等运动方式的数学模型和实现方法。对于新型模拟器中正弦运动的函数计算,采用建立正弦快速查表和定时中断程序结合的方法实现。并以建立的正弦和等速运动的数学模型为例,对模拟器中正弦和等速运动曲线图进行分析和验证。在某模拟器的设计中,该数学模型结合虚拟仪器技术,得到很好的应用,避免了模拟器中复杂的电子线路设计。     

Heteropoly acids of the Keggin type with N-substituted β-amminoethylphosphonic acids as coordinate center

Organophosphorus-heteropolytungstic acids of 1 : 12 of P/W ratio, with N-substituted 2-amminoethylphosphonic acids R2R'N+CH2CH2PO3H- (R = R' = H; R = Me, R' = H; R = R' = Me; R = H, R' = Me2CH; R = H , R' = CH3(CH2)2CH2) as coordinate centers were prepared, and characterized by means of elemental analysis, IR, UV spectroscopy, TG and DSC thermal analysis. The results indicate that these organophosphorous-HPAs possess Keggin type structure, and their stoichiometric formulation is R2R'N+CH2CH2PO3H - ·W12O36 ·nH2O. The organic side chain with the ammino-group R2R'N+CH2CH2- and the phosphono-group-PO3H- participate altogether in the formation of the primary structure of the heteropoly anion. In other words, the entirety of each compound R2R'N+CH2CH2PO3H- is as the core or coordinate center of the heteropoly anions. The number of crystal water in the HPA was affected obviously by the N-substituents of the organo-phosphonic acids.     

POSITRON ANNIHILATION STUDY OF THERMOELASTIC MARTENSITE STABILIZATION IN A THERMALLY CYCLED CuZnAl ALLOY--A DISCUSSION OF ORIGIN OF THERMOELASTIC MARTENSITE STABILIZATION

The thermally cycled samples of Cu-23at%Zn-10at%Al have been studied by means of positron annihilation. It is shown that vacancies and their movement seem to be the leading factors resulting in thermoelastic martensite stabilization based on the fact that stabilization was no longer present and the great decrease of positron parameters after the samples in martensite were thermally cycled.     

投资控制模型解的渐近性质

本文利用初值比较法和边值比较法，讨论了投资系统解的渐适性质，得到了投资控制模型的平衡解是全局渐近稳定的．     

含有时滞的非线性投资系统模型

在分析投资时滞特征的基础上 ,讨论投资时滞的计算方法 ,给出具有役龄结构并带有时滞的投资系统模型 .     

转换屏背底散射对图像对比度的影响

在X光图像探测系统中，通常采用把X光转换为可见光、对可见光进行探测的方法来完成对X光的探测。在转换过程中，一般采用各种类型、结构的荧光屏来完成将X光转换为可见光的过程，而在高能X光的探测系统中，则常采用量子效率高、原子序数大的材料如CsI：T1晶体作为转换屏。由于转换屏存在一定的厚度，所发出的可见光将会在转换屏内部进行全方位的传播，一部分照射到转换屏背底的可见光被散射后进入图像记录系统，