基于自适应神经模糊推理系统的陀螺建模方法

系统地介绍了近年来陀螺信号处理中出现的各种主要的滤波方法,并分析了各自的优缺点.针对陀螺输出信号自身的特点,提出了一种基于自适应神经模糊推理系统的陀螺滤波方法,建立了陀螺误差模型.提出的滤波方法同时具有神经网络与模糊逻辑推理的优点,从而有效地减小了建模误差.分别探讨了陀螺静态时的零偏信号估计模型与敏感动态信号时的滤波方案.由仿真结果可以看出,该方法可以有效地估计陀螺的零偏,并能抑制陀螺输出信号中的噪声.     

双染料复合敏化SnO2纳米多孔膜光电极的研究

光电化学;光电转换;双染料复合敏化SnO2纳米多孔膜光电极的研究     

DNA-modified electrodes (Ⅶ)——Preparation and characterization of DNA-bonded and DNA-adsorbed SAM/Au electrodes

Two kinds of DNA-modified electrodes were prepared by covalent and adsorptive immobilization of DNA onto self-assembled monolayers of 2, 2'-dithiodiethanol on gold electrodes and characterized by cyclic voltammetry, Xray photoelectron spectroscopy and scanning tunneling microscopy. The results suggest that the methods are satisfactory for the immobilization of DNA on electrodes.     

双荧光层靶Kα线强度比诊断靶内超热电子温度北大核心CSCD

利用双荧光层复合靶产生的Kα特征线强度比诊断了靶内超热电子的温度,即通过实验测量复合靶中两种不同材料荧光层辐射出的Kα特征线强度比,结合ITS3.0程序模拟结果,对超热电子温度进行诊断。将诊断结果与实验中利用电子磁谱仪测量的超热电子温度进行了比较,二者基本一致。结果表明,选取适当的荧光层靶厚,可以利用双荧光层复合靶产生的Kα特征线强度比对靶内的超热电子温度进行诊断。     

异丙醇-水体系中分子间相互作用对萘迁移热力学性质的影响

研究了萘从水到H2O-异丙醇(IPA)混合溶剂中的迁移变化,表明萘的迁移随异丙醇摩尔分数x(IPA)的增加呈复杂的下降趋势．标准迁移熵和标准迁移焓的研究表明,随异丙醇摩尔分数x(IPA)的增加,二者呈现双峰变化．迁移熵和迁移焓的双峰变化,表明系列H2O-IPA混合溶剂的微观结构经历了从相对的有序到元序到再有序、再元序、再有序的变化过程,H2O-IPA混合溶剂中除了在富水区存在着笼合物的特殊结构外,在x(IPA)约为0．08处还存在着一相对有序的结构．研究表明,H2O-异丙醇(IPA)混合溶剂组成、结构变化均对萘的迁移产生着明显的影响．     

石墨烯的制备、功能化及在化学中的应用

石墨烯是最近发现的一种具有二维平面结构的碳纳米材料, 它的特殊单原子层结构使其具有许多独特的物理化学性质. 有关石墨烯的基础和应用研究已成为当前的前沿和热点课题之一. 本文仅就目前石墨烯的制备方法、功能化方法以及在化学领域中的应用作一综述, 重点阐述石墨烯应用于化学修饰电极、化学电源、催化剂和药物载体以及气体传感器等方面的研究进展, 并对石墨烯在相关领域的应用前景作了展望.     

Synthesis and Structural Characterization of a Cyano-bridged Dinuclear Neodymium(III)-iron(III) Complex [Nd(DMSO)5(H2O)2](μ-CN)[Fe(CN)5]

A new neodymiumIII-ironIII complex [Nd(DMSO)5(H2O)2](μ-CN)[Fe(CN)5] (DMSO = dimethyl sulfoxide) has been synthesized by the grinding reaction method. The crystal belongs to monoclinic, space group P21/m with a = 8.859(4), b = 13.684(5), c = 12.290(4) A, β = 91.85(2)o, C16H34FeN6NdO7S5, Mr = 782.88, V = 1489(1)A3, Z = 2, Dc = 1.746 g/cm3, S = 0.906, μ(MoKα) = 2.606 mm-1, F(000) = 788, R = 0.0646 and wR = 0.1654. The slightly distorted square-antiprism eightfold-coordinated Nd(III) and approximately oriented octahedrally sixfold- coordinated Fe(III) are linked by a cyano-bridge group to construct a dinuclear compound. The [Nd(DMSO)5(H2O)2](μ-CN)[Fe(CN)5] species are held together via hydrogen bonds to form a three-dimensional framework.     

Synthesis and Crystal Structure of an Ion-Pair Compound:[HL]2[Ni(CN)4]·4H2O(L=4-(2-Hydroxyphenyl)-1,5,9-triazacyclododecan-2-one)

An ion-pair compound,[HL]2[Ni(CN)4]·4H2O 1 has been obtained as an unexpected product when we attempt to prepare a heterometallic cyano-bridged complex by the reaction of GdCl3·nH2O,K2Ni(CN)4 and L (L=4-(2-hydroxyphenyl)-1,5,9-triazacyclododecan-2-one) in aqueous solution,and characterized by single-crystal X-ray diffraction.It crystallizes in monoclinic,space group P21/n with a=12.380(1),b=9.9637(8),c=17.087(1)A,β=105.947(2)°,V=2026.6(3) A3,Rint=0.0509,Z=2,Dc=1.297g/cm3,C34H56O8N10Ni,Mr=791.60,F(000)=844,μ(MoKα)=0.538 mm-1,S=1.030,the final R=0.0644 and wR=0.1299 for 2023 observed reflections with I≥2σ(I).The title compound 1 contains one anion of [Ni(CN)4]2-,two cations of [HL]+and four packing water molecules,which are held together by the N-H…O and O-H…O hydrogen bonds to form a three-dimensional framework.     

Solvothermal Synthesis and Crystal Structure of [H2N（CH2）2NH3]{Co[H2N（CH2）2NH2]3}[SbSe4]

1 INTRODUCTION The chalcogenidometallates with open frame- works have attracted considerable interest as pos- sible zeolite-like materials, of which highly interes- ting properties could be expected. Over the last de- cades a large number of thioanti…     

奈韦拉平对乙醇脱氢酶催化活性的影响及机制研究

奈韦拉平(Nevirapine, NVP)是一种在临床上用于治疗和预防艾滋病的药物,但NVP会导致肝脏中一些酶的活力异常。乙醇脱氢酶(ADH)是肝脏中一种重要的代谢酶,目前NVP对ADH催化活性的影响尚不清楚。因此,本研究通过光谱学和分子对接技术探究NVP对ADH催化活性的影响及机制。实验结果表明,NVP通过诱导ADH的二级结构发生改变的模式激活ADH的催化活性,并且呈现剂量依赖性。NVP在范德华力和氢键的驱动下进入ADH的辅酶空腔从而形成稳定的二元复合物。热力学实验结果表明两者之间的结合常数为1.478×10⁴ L·mol^-1(298 K)。此外,NVP与ADH的Leu326、Ile328、Arg48等氨基酸残基之间的Pi-Cation、Pi-Alkyl以及Alkyl作用力在维持复合物稳定性方面同样发挥重要作用。