航天器地面供配电设备接口设计技术

航天器地面供配电设备必须要确保供电控制的可靠和测量的准确。概述了该设备的基本组成和功能，对设备和航天器之间的控制信息、状态信息和测量信息的接口设计技术作了较详细地论述，并且结合有代表性的示例给出了参考电路图和说明。     

神经元网络场电位的迭代学习控制研究

基于映射神经元模型和Hindmarsh-Rose神经元模型构建小世界神经网络,并施加带有遗忘因子的迭代学习控制算法,以实现神经网络的同步控制。仿真结果表明迭代学习控制同时适用于离散的和连续的神经网络模型,可以实现神经网络同步和去同步状态的相互转化,其优势在于随着迭代次数的增加,控制信号强度逐渐减弱,从而保持神经元本身的放电特性不变。所得结果为将非线性控制理论应用于帕金森等神经疾病控制提供了新思路。     

空芯螺管型超导储能磁体的优化设计方法

微、小型超导储能系统由于运行操作灵活性和制造工艺简单而在电力系统中具有广泛的应用前景。作为超导储能系统的关键部件,储能超导磁体的优化设计,不仅应从技术上保证超导储能系统运行的安全可靠性,而且应能最大限度地降低制造成本。本文针对超导储能磁体系统的基本组成单元－螺管型超导磁体,从磁体绕组的基本参数如绕组厚度、径高比的变化出发,分析了螺管型储能超导磁体的储能效率,提出了螺管型超导储能磁体的优化设计方法。     

基于数学形态学的运动估计及VLSI设计

提出的基于数学形态学的运动估计算法,采用四场的SAD比较进行运动估计,并且对运动向量进行数学形态学滤波处理(先进行腐蚀,再进行扩散处理),削弱噪声影响,提高运动估计的精度.在VLSI实现中采用外挂SDRAM作为帧存储器,存储前两场图像数据和运动信息.本算法和VLSI设计经过FPGA验证,取得了很好的效果,并且已经被成功地应用于基于SMIC 0.18 μm CMOS工艺的数字视频处理芯片中.     

Synthesis and electrochemical,in situ spectroelectrochemical,electrical and gas sensing properties of ball-type homo- and hetero-dinuclear phthalocyanines with four [1a,8b-dihydronaphtho[b]naphthofuro[3,2-d]furan-7,10-diyl] bridges

The new mono-nuclear Fe^II 2 and ball-type homo-dinuclear Fe^II–Fe^II 3 phthalocyanines have been synthesized from the corresponding 4,4′-(1a,8b-dihydronaphtho[b]naphthofuro[3,2-d]-furan-7,10-diyl)bis(oxy)diphthalonitrile 1 while ball-type hetero-dinuclear Fe^II–Co^II phthalocyanine 4 was synthesized from 2. The compounds have been characterized by elemental analysis, UV–vis, IR and MALDI-TOF-mass spectroscopies. The redox behaviours of the complexes were identified by controlled-potential coulometry, cyclic voltammetry and differential pulse voltammetry measurements on Pt in dimethylsulfoxide containing tetrabutylammonium perchlorate. The assignments of the redox processes and the understanding of the interactions between the metal phthalocyanine units in 3 and 4 were achieved by the combined evaluation of the voltammetric and in situ spectroelectrochemical outcomes. Complex 3 showed ring-based mixed-valence behaviour as a result of the considerable interaction between the phthalocyanine rings. On the other hand, the interactions between the two metal phthalocyanine units of 4 were found to be much weaker than those in 3. The potential application of molecular organic semiconductors needs the control adjustment of conductivity. Ac and dc conductivity measurements were performed with the applied external electric filed. At high frequency, the conduction follows the universal power law and conduction mechanism can be explained by classical hopping barriers mechanism for the system.     

水与城市——以杭州城西水街为例,探讨商住区的河道处理

该文从空间入手,以杭州城西水街为例,研究了水与城市有机结合的方法和必要性,阐明其中所蕴含的文化沉积和历史底蕴是值得我们去感悟的。     

关于高校小型计算机实验室安全管理的思考

现代化教育越来越依赖于网络技术,因此,计算机机房作为教学前沿已成为高校开展信息教育和专业技术教育的重要依托点.但是,随之而来的,计算机实验室出现诸如设备安全、网络安全、卫生维护等一系列管理问题,尤其是非计算机专业学生使用计算机实验.机房管理既关系到计算机教学质量,也反映了一个学校的信息化建设水平.所以必须制定一些制度和措施进行改革和完善,以期更好地实现现代化教学进程.     

一种新的多传感器故障分类诊断方法研究

本文在分析了现有故障诊断方法的特点及其不适于多传感器故障分类诊断的原因基础上,结合网络形式多输出模糊逻辑系统的单输出模糊逻辑系统传感器故障分类诊断方法,提出了一种新的适合于多传感器故障分类诊断的模糊逻辑系统方法、仿真实验难证了此方法的有效性。     

Dielectric and ferroelectric properties of Perovskite Pb(Zr, Ti)O3 films deposited by sputtering on Si substrate

Lead zirconate titanate (PZT) thin films were deposited by radio-frequency (r.f.) magnetron sputtering with stoichiometric single oxide target on silicon substrates. The influence of the growth conditions (with or without substrate heating) and the post-annealing treatments (conventional or rapid thermal annealing) on the film properties in terms of structure and microstructure was systematically evaluated. The electrical properties such as the dielectric constant, the loss factor, the leakage current and the ferroelectric properties have been characterized.     

合成孔径雷达的有源欺骗干扰方法研究

本文根据SAR成像原理和地面回波信号模型,提出了对SAR进行有源欺骗干扰的方法.文中详细地讨论了有源干扰的基本原理,分析了干扰信号模型,并用实际SAR数据进行了仿真实验,欺骗图像成功加到了真实SAR图像中.