基桩完整性量化分析

本文针对国内广泛研究基桩低应变检测法的现状,基于阻尼振动和波动理论,结合波形拟合的分析思路,推导出模拟加速度实测信号的拟合方程,编制了MATLAB波形拟合分析程序,并做了试验桩检测验证。分析结果证明,推导的加速度信号方程能够正确模拟实测加速度信号。正确分析出缺陷桩的桩长、缺陷位置和缺陷程度。对实际检测工程有一定的指导意义。     

中职数学课教学局面堪忧

中等职业学校的数学课教学近些年出现了一些令人堪忧的局面,主要是: 一、学生厌学情绪严重.理科班(或全男班)的大部分同学,甚至整个班放弃学习数学(英语等基础课),文科班受其影响学习气氛也大不如前.     

Isolation and Identification of Phosphate-accumulating Strain PAO3-1 and Its Phosphorus Removal Characteristics

A phosphate-accumulating bacteria strain PAO3-1 was isolated from biological phosphorus removal sludge supplied with sodium acetate as carbon source under stable performance. This strain has good enhanced biological phosphorus removal effect on normal activated sludge system. Phosphorus removal ratio was raised form 44%with no added strain to more than 82% with strain strengthening biological phosphorus removal. It is identified to be AlcaUgenes sp. according to its morphology,biochemical characteristics and 16S rDNA sequence analysis. The cell of strain PAO3-1 is straight bacilli form, 0.4×1.1 μm, no flagellum, gram negative and special aerobiotic. The optimal temperature and pH for growth are 32℃-37℃ and 5.5-9.5, respectively. The shape of slant clone is feathery. The phosphate situation, which was 76. 5% higher than that in non-starving situation. Its phosphate release rate of log course in anaerobic phase and in culture without phosphorus was lower than that in log course.     

正常人和不育患者精子膜上凝集素受体的数量与部分性质

应用＾１２５Ｉ－ＣＫＬ对正常人和不育患者精子膜上凝集素受体进行研究的结果表明，不育精子膜上凝集素受体的差异，可能是不育的原因之一。     

Cr^3＋在反丁烯二酸存在下水解聚合作用热力学性质的微量热？…

本文用微量量热计测定了在反丁烯二酸存在下高铬浓度水解聚合作用的热效应，结合戴安邦等人的研究工作，求出了不同温度下的水解聚合作用的平衡常数及有关的热力学函数。     

MAC-6型金属陶瓷在铜液中的腐蚀行为

在实验室中模拟现场使用条件,用坩埚浸渍腐蚀试验,考察了温度、气氛氧分压对MAC-6型金属陶瓷在铜液中腐蚀的影响。解剖现场使用后的金属陶瓷保护管,确认 MAC-6型金属陶瓷保护管是具有抗热震、耐铜液腐蚀性能的新型材料。此研究结果为保护管现场合理使用提供了依据。     

R~n中区间插值和逼近

本文给出R~n中区间插值多项式和误差估计并且在一般情况下讨论了区间逼近问题,内容包括1.R~n中区间插值公式及误差界2.R~n中的区间逼近