析出相对Monel K-500合金冲击韧性的影响

通过一系列实验研究了Monel K-500合金的冲击韧性。结果表明,合金经550~650℃时效后其冲击断口呈沿晶形貌;在750~850℃时效时,其冲击韧性与强度呈正相关关系。根据对合金在不同热处理状态的析出相形态及分布的研究,揭示了形成这些现象的原因。合金在550~650℃时效时,在晶内析出的γ’相呈球状均匀分布,而在部分晶界附近的γ’相呈条棒状或排成帘状垂直于晶界分布,由此导致时效态合金在断裂时,裂纹沿晶界扩展。在750~850℃时效会导致合金形成大量沿晶界网状分布的二次MC相,从而降低合金的冲击韧性。     

TGDDM/1,4-二(4-氨基苯-1-氧)正丁烷非等温固化反应动力学

合成了一种新型环氧树脂固化剂1,4-二(4-氨基苯-1-氧)正丁烷(DDBE),并采用FTIR、¹H NMR手段对其结构进行表征和确认。采用非等温差示扫描量热法(DSC)研究了N,N,N',N'-四缩水甘油基-4,4'-二氨基二苯甲烷(TGDDM)/DDBE体系的固化反应动力学,根据Kissinger方程计算体系的活化能为58.5 kJ·mol^-1;采用Málek法进行模型拟合动力学分析,结果表明:其中的Šesták-Berggren模型的拟合曲线与实验的DSC曲线吻合,确定了体系的固化反应动力学参数和方程。DSC测试TGDDM/DDBE固化物玻璃化转变温度为195℃。     

《霍乱时期的爱情》中的生存美学研究

西亚?马尔克斯在《霍乱时期的爱情》中用霍乱隐喻爱情,将爱情、死亡和生存主题紧密交织在作品之中。揭开霍乱和爱情的表里,影片中蕴藏了对生存的深刻哲思。疾病席卷、死亡威胁、爱情失意弥漫主人公阿里萨的人生,逆境之中尊重生命、信仰爱情、呵护自我是他始终坚持并践行的生存之道。运用福柯的生存美学理论剖析阿里萨在逆境之中选择的生存策略,以期为身处灾难、疾病或困境中的当代人们以借鉴与启迪。     

修正的Szász算子同时逼近的点态估计(英文)

证明了定义在 [0 ,∞ )上的具有 s阶连续有界导数的函数可以用修正的 Sza′sz算子线性组合的 s阶导数逼近 ,得到了点态逼近的正定理和逆定理 .     

Hájek-Rényi-type Inequality for a Class of Random Variable Sequences and Its Applications

In this paper,we obtain the Hájek-Rényi-type inequality for a class of random variable sequences and give some applications for associated random variable sequences,strongly positive dependent stochastic sequences and martingale difference sequences which generalize and improve the results of Prakasa Rao and Soo published in Statist.Probab.Lett.,57(2002) and 78(2008).Using this result,we get the in-tegrability of supremum and the strong law of large numbers for a class of random variable sequences.     

修正Szász算子线性组合的逼近

给出了修正 Szász算子线性组合点态逼近的正逆定理     

二元q-Szász-Mirakyan算子的逼近性质

该文在Ali.A提出的q-Szász-Mirakyan算子的基础上,提出了二元q-Szász-Mirakyan算子,并研究了它的性质和Cp1,p2空间上的函数在算子作用下的逼近,利用泰勒定理和它的性质,证明了二元q-Szasz-Mirakyan算子的Voronovskaya型定理。     

桐马酸酐与环氧树脂的非等温固化反应动力学

采用Málek法对桐马酸酐与双酚A环氧树脂E-51体系(含有1%质量分数的DMP-30)的非等温固化反应动力学进行了研究。通过机理函数esták-Berggren方程很好地模拟了真实的固化反应过程。等转化率法求得反应活化能为69.78 kJ/mol。指前因子A的值为4.567×108 min-1,n和m的值分别为1.082和0.456。根据得到的固化动力学方程计算可知,在固化温度为137.05℃时达到98%固化度的固化时间为115 min。     

秘鲁圣加旺水电站调节库基础液化砂层处理研究

圣加旺水电站是秘鲁东南部圣加旺河干流上的低坝长引水电站,工程位于高地震区,首部枢纽调节库基础部位分布有液化性的含砾砂层,强震下砂土液化将危及建筑物安全。采用粒径法初判和标贯法复判对该部分砂土液化性进行了判别,并根据砂土液化指数对液化等级进行了确定;根据调节库的布置情况及运行条件,优化了地基抗液化处理范围;综合考虑调节库地形、地质条件及靠近河岸等因素,经方案比选,采用了强夯加振冲碎石桩的综合处理措施;调节库基础承载力和边坡稳定性分析表明基础处理设计满足要求。     

Research notes: San Lázaro Psychiatric Hospital, “El hospicio de Quito”, Ecuador.

The author had heard of “El Hospicio de Quito” from colleagues in Colombia who had informed the author that it was one of the oldest psychiatric hospitals in Latin America, but yet it merits barely a mention in the English language literature and surprisingly little in the Spanish. Those wishing to investigate further may want to obtain Mariana Landázuri Camacho’s (2008) book Salir del encierro. Medio siglo del Hospital Psiquiátrico San Lázaro, which apparently contains a more complete history, although it seems only available from select shops in Quito. Archives relating to the hospital are held in Quito’s Museo Nacional de Medicina. The building is not open to the public, but the staff were friendly and welcoming, and, at the very least, the exterior is worth a visit for its architectural beauty and evocative location. There are no histories of this important institution in the English academic literature, and Landázuri Camacho’s book is apparently the only serious attempt at historical scholarship anywhere. Clearly, there is still much to be investigated about the history of this important institution. (PsycINFO Database Record (c) 2010 APA, all rights reserved)