工程硕士"过程系统工程概论"教学改革

过程系统工程概论是研究化工过程整体特性的一门学科,是华东理工大学工程硕士必修课.通过该课程的教学改革,我院建立了一支稳定的教学小组,制作了多媒体课件,拓展了课程的前沿领域,取得了良好教学效果.     

Filter-free photonic microwave waveforms generation based on polarization-sensitive Mach–Zehnder modulator

Photonic Network Communications - This paper has proposed a photonic microwave waveforms generation scheme based on a dual-polarization Mach–Zehnder modulator (DPol-MZM) at moderate...     

钢结构建筑的防雷、接地、等电位联结做法

适用于所有钢结构建筑物设计施工。在施工方法、材料用量都很经济的情况下,使建筑物处于对雷击、雷击电磁脉冲的最佳防护之中。     

影响热释光剂量计定度系数的因素

介绍了ＴＬＤ定度系数的三种影响因素,并指出剂量传递法定度ＴＬＤ的定度系数,可以使ＴＬＤ测量剂量的相对误差控制在±５％。     

哌嗪及其衍生物与羟乙基乙二胺的混合水溶液吸收CO_2性能

研究了313K时40%(质量分数)哌嗪(PZ)、N-氨乙基哌嗪(N-AEPZ)和羟乙基哌嗪(HEPZ)溶液吸收CO2性能以及30%AEE+10%PZ、30%AEE+10%N-AEPZ和30%AEE+10%HEPZ溶液对CO2的吸收性能。考察了吸收速率、吸收量、吸收时间、温度变化和PZ及其衍生物含量之间的相互关系。考察了解吸量与解吸时间的关系,解吸温度为393K。结果表明,分子结构中的多氨基基团有利于提高吸收性能;在复合体系中,N-AEPZ为主吸收作用,PZ与AEE共同作用,HEPZ为助吸收作用,提高主吸收组分的浓度有利于提高溶液的吸收能力,其中30%AEE+10%PZ的混胺溶液具有良好的吸收和解吸性能。     

Modeling muscle wrapping and mass flow using a mass-variable multibody formulation

Multibody System Dynamics - Skeletal muscles usually wrap over multiple anatomical features, and their mass moves along the curved muscle paths during human locomotion. However, existing...     

Biomineralization of large hydroxyapatite particles using ovalbumin as biosurfactant

Hydroxyapatite (HA) is synthesized via a biomineralizing route by using ovalbumin as natural biosurfactant. The product material is characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). It shows that large HA spindle-like particles measured at 0.8 mm in length are aggregates from the needle-like nanocrystals. Furthermore, it is proved that there are superfluous positive charges on the surface of HA particles by using the electrophoretic method. It shows that the large particles are self-assembled from large amounts of HA nanocrystals with ovalbumin as biosurfactant. The interactions between ovalbumin and HA crystals have great effects on the formation of large HA particles and the positive charges on the surface of the particles.     

Biomineralizing synthesis of mesoporous hydroxyapatite–calcium pyrophosphate polycrystal using ovalbumin as biosurfactant

Mesoporous polycrystals of hydroxyapatite–calcium pyrophosphate (HA–CPP) are synthesized via a biomineralizing route using ovalbumin as natural biosurfactant. The mesoporous structure of HA–CPP is characterized by means of X-ray diffraction (XRD), N₂ adsorption–desorption isotherms (NADI), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), atom force microscopy (AFM), polarization microscopy (PLM) and stereomicroscopy. The results show that the crystalline grains with an average diameter of 13.2 nm are uniformly distributed along the protein molecule chains, and this results in microsphere-like particles with diameters of 200–300 nm. The highly ordered pores involved in microspheres are found to be approximately 6.6 nm by small-angle XRD. The formation of lyotropic calcium liquid crystal (CLC) plays a key role in the formation and stabilization of the mesoporous structure. A schematic illustration is used to reveal the mechanism of protein-medicated HA–CPP biomineralization, which employs the protein tertiary structure to explain the formation of the porous particles.     

带状螺旋慢波结构耦合阻抗的研究

本文运用螺旋坐标系计算了带状螺旋慢波线结构的耦合阻抗,本文给出了螺肇带缝隙内的电磁场解,因而明确地计算了螺旋带缝隙内的传输功率,分析这一部分功率对耦合阻抗的影响,结果发现螺肇带缝隙传输功率对耦合阻抗的影响较大,包括这一部分功率后,理论与实验符合得很好。     

生物质直燃发电机组性能测试与火用分析

以设计燃料为棉花秸秆的某30MW高温高压生物质直燃发电项目作为研究对象,在6个不同工况下,对额定蒸发量为130t/h的生物质燃烧专用水冷振动炉排锅炉进行测试,对锅炉热效率进行计算,发现锅炉热效率小于设计值的主要原因是排烟温度偏高和燃料成分差异。对30MW纯凝汽式汽轮机进行测试,对汽轮机热耗进行计算,发现汽轮机热耗小于设计值的主要原因是背压偏高。对全厂热效率进行计算,发现随着功率的增加,热效率呈增加趋势。对热力循环过程进行火用分析,发现在锅炉内的温差换热和燃烧环节火用损失最大。