体硅热膜传感器单片集成工艺的研究

针对MEMS热膜式传感器的发展趋势和在实用化过程中存在的问题,提出了一种新型的单片电路和体硅MEMS热膜式传感器实现集成制造的嵌入式CMOS工艺技术,解决了MEMS制造工艺和CMOS集成电路工艺之间存在的兼容性问题。通过这种嵌入式CMOS工艺技术,可以实现具备最小体积、最低成本的MEMS器件。通过这种嵌入式热膜式传感器和CMOS处理电路的单片集成制造工艺,实现了一款热膜式传感器和IC放大电路的集成部件,并完成了相关基本电性能测试和传感器功能的演示验证,证明了设计的工艺路线的可行性。     

Scalable modeling and comparison for spiral inductors using enhanced 1-π and 2-π topologies

Two different scalable models developed based on enhanced 1-πand 2-πtopologies are presented for onchip spiral inductor modeling.All elements used in the two topologies for accurately predicting the characteristics of spiral inductors at radio frequencies are constructed in geometry-dependent equations for scalable modeling.Then a comparison between the 1-πand 2-πscalable models is made from the following aspects:the complexity of equivalent circuit models and parameter-extraction procedures,scalable rul...     

Multinuclear solid-state NMR studies on phase transition of mesostructured aluminophosphate

The phase transition process from a hexagonal to a lamellar mesostructured aluminophosphate was studied by multinuclear solid-state NMR techniques in combination with low-angle XRD and elemental analysis measurements. The XRD result showed that after hydrothermal treatment for 9 h, the initial hexagonal phase began to transform to a lamellar phase. It was also found by NMR that some initially formed aluminophosphate was hydrolyzed during the earliest 2 h of the hydrothermal treatment, and the inorganic aluminophosphate framework became more and more condensed during the phase transition. The organic surfactant mainly has a gauche conformation in the hexagonal phase, whereas it mainly has a trans conformation in the lamellar phase and is packed more compactly. The Br^? anion is found to be involved in the phase transition and likely enters into the interface to compensate the lost of negative charges that generated by the condensation of the aluminophosphate. Finally, a mechanism for the phase transition is proposed.     

Advances and challenges in protein-ligand docking

Molecular docking is a widely-used computational tool for the study of molecular recognition, which aims to predict the binding mode and binding affinity of a complex formed by two or more constituent molecules with known structures. An important type of molecular docking is protein-ligand docking because of its therapeutic applications in modern structure-based drug design. Here, we review the recent advances of protein flexibility, ligand sampling, and scoring functions-the three important aspects in protein-ligand docking. Challenges and possible future directions are discussed in the Conclusion.     

Highly Enantioselective Epoxidation of Unfunctionalized Olefins Catalyzed by Chiral Jacobsen’s Catalyst Immobilized on Phenoxy‐Modified Zirconium Poly(syrene‐phenylvinylphos‐ phonate)phosphate

Chiral Jacobsen’s catalyst was axially immobilized onto phenoxy‐modified zirconium poly(styrene‐phenylvinylphosphonate)phosphate (ZPS‐PVPA). The immobilized catalysts show comparable ee values for asymmetric epoxidation of styrene and much higher ee values for α‐methylstyrene (73.7% vs. 54.0%) and indene (99.9% vs. 65.0%) than the homogeneous Jacobsen’s catalyst. Moreover, the as‐synthesized catalysts are relatively stable and can be recycled at least five times without significant loss of activity and enantioselectivity. A point worth emphasizing is that the heterogeneous catalysts afforded remarkable increases of conversion and ee values in the absence of expensive O‐coordinating axial bases for the asymmetric epoxidation of olefins, especially for the epoxidation of α‐methylstyrene (conversion: from 24.3% to 99.9%; ee: from 29.4% to 73.7%), which may overcome the last obstacle for the potential industry application of chiral Jacobsen’s catalyst.     

基于相位拟合的绝对式光电精密测角方法

单码道绝对式轴角编码器具有分辨力高、结构简单、可靠性强等优点。为实现角度高精度快速识别和细分测量,提出一种基于相位拟合的绝对式编码器角度细分方法。该方法利用最长线性反馈移位寄存器序列(m序列)进行单码道绝对式编码,首先对CCD采样电平信号进行计数,判断码值组合后得到粗码译码数据;接着利用牛顿迭代法实现三角函数拟合从而获取相位信息,并提出基于相位信息的角度细分算法获得细分角度;最后结合粗码数据与细分角度得到角度信息。实验结果表明,提出的新型测角方法测角标准偏差达到4.57″,最小分度误差仅为0.23″,该方法大大提高了分辨力和精度,并且从原理上避免了码盘粗大误差对测角的影响。     

薄膜AlGaInP发光二极管中不同反光镜的研究

本文计算了GaP/Au 反光镜, GaP/SiO2/Au 三层ODR and GaP/ITO/Au 三层ODR的反射率随角度的变化值。制作了GaAs衬底的AlGaInP LED,Au反光镜、SiO2 ODR和ITO ODR的薄膜AlGaInP LED。在20mA下,四种样品光输出功率分别为1.04mW, 1.14mW, 2.53mW and 2.15mW。制作工艺退火后,Au扩散使Au/GaP反光镜的反射率降至9％。1/4波长的ITO和SiO2透射率不同造成了两种薄膜LED光输出功率不同。ITO ODR中加入Zn可以大大降低LED的电压,但并不影响LED的光输出。     

一个建筑艺徒的中国现代建筑史心结

1962年10月,我毕业分配到著名的青岛铁道部四方机车车辆工厂,在设计科当了一名产品的美工设计师。在这片交大毕业生的乐土上,我曾幻想过回归建筑设计队伍,却从来没有想到,能与中国现代建筑史结缘,我学习中国现代建筑史,纯系偶然,是误入史林。回头想来,却也有点滴征兆,把我往这条路上点化。     

高腐蚀率钢筋混凝土梁抗弯性能研究

对4根未腐蚀和16根腐蚀钢筋混凝土梁进行抗弯试验,研究重复荷载下高腐蚀率对钢筋混凝土梁变形、裂缝、承载力及破坏机理的影响。提出重复荷载下受腐蚀钢筋混凝土梁承载力计算公式。同时拟合出钢筋腐蚀率对钢筋混凝土受弯开裂的影响,并提出受腐蚀梁在重复荷载下的开裂荷载计算公式。     

夏热冬冷地区节能减排、适宜居住绿色农宅设计策略研究——浙江省桐庐县分水镇为例

为研究降低农村建筑能耗,提高居住舒适度的适宜性绿色农宅设计策略,特选取夏热冬冷地区具有代表性的浙江桐庐分水镇百岁坊村农宅为研究对象。根据现场测量、调研,运用spss软件对调查问卷进行统计,分析农民居住现状、生活方式与能耗。根据地形、气候,提出具有当地农村特色的、结合节能各项措施的建筑设计方案。经ecotect日照、pkpm节能软件验证,该方案节约能耗78.56%,居住适宜,具有推广价值。