血液灌流治疗高胆红素血症的研究进展

胆红素是血红素的分解产物，由于它的毒性，去除胆红素一直是人工肝支持装置研究的热门课题，本文综述了包括ＮＫ－１１０，ＢＲ－６０１，ＡＲ－１，ＭＲ等在内的十几种用于治疗高胆红素血症的高效吸附剂。     

亚声速NH3分子束静电Stark减速的理论研究

本文基于自行研制的第二代(180级)静电Stark减速器, 展开了对NH₃的有效减速与冷却的理论研究. 首先, 计算了NH₃分子在|J=1, K=1>量子态的Stark分裂, 研究了不同的同步相位角下, 减速器中NH₃分子的纵向相空间稳定区域; 接着, 采用Monte-Carlo方法研究了该分子在传统工作模式下的减速效果, 并讨论了该减速模式下多个参数(包括每级损失动能、分子波包末速度和相对减速效率)与同步相位角的依赖关系, 以及减速波包末速度与减速电压的关系, 研究发现: 采用传统的Stark减速模式, 当减速电压为±13 kV、同步相位角φ₀=26.08°时, 即可实现NH₃从280 m/s到6.7 m/s的有效减速, 对应平动动能减少了99.9%, 其波包温度由1.34 K降至80 mK; 最后, 研究了先聚束后减速模式下NH₃分子的减速效果, 以及该减速模式下减速波包末速度与同步相位角的依赖关系, 结果表明: 当减速电压为± 6.5 kV, 采用前15级电极作为聚束电极, 后165级作为减速电极时, 可将NH₃分子波包的中心速度由280 m/s减至20.7 m/s, 平动动能减少了99.4%, 温度由1.34 K降至1.6 mK, 与传统减速模式相比, 冷分子波包温度降低至1/50. 由此可见, 采用180级的传统Stark减速器完全可以实现具有较低Stark势能的NH₃分子的有效减速与冷却, 并获得温度约为1 mK的冷分子波包, 为进一步的实验研究提供了可靠的理论依据.     

基于LabVIEW的高温超导电缆测试平台的设计

为了进行高温超导电缆直流性能测试实验和长时间交流运行实验,开发了基于LabVIEW的高温超导电缆测试平台。该测试平台由PXI系统和标准程控仪器测试系统两部分组成。其中,PXI系统用于温度和交流信号的采集;标准程控仪器系统负责微弱直流信号的测量。平台可实现对各参量的采集、波形显示、数据保存以及历史数据查询等功能。     

A novel solution-based self-assembly approach to preparing ultralong titanyl phthalocyanine sub-micron wires

Ultralong titanyl phthalocyanine （TiOPc） sub-micron wires have been synthesized by a novel solution-based self- assembly method. By using different solvents, changing the mass concentration and the solvent vapor pressure, the length and the shape of the wires can be adjusted. The mixed-phase properties of the TiOPc sub-micron wires were investigated by the ultraviolet-visible （UV-vis） absorption spectrum and X-ray diffraction. Organic transistors based on these wires were studied, which show the typical p-channel characteristics.     

A CLASS OF REDUCED GRADIENT METHODS FOR HANDLING OPTIMIZATION PROBLEMS WITH LINEAR INEQUALITY CONSTRAINTS

A class of reduced gradient methods for handling general optimization problems with linear equality and inequality constraints is suggested in this paper. Although a slack vector is introduced, the dimension of the problem is not increased, which is unlike the conventional way of transferring the inequality constraints into the equality constraints by introducing slack variables. When an iterate x(k) is not a K-T point of the problem under consideration, different feasible descent directions can be obtained by different choices of the slack vectors. The suggested method is globally convergent and the numerical experiment given in the paper shows that the method is efficient.     

Compact wide stopband superconducting bandpass filter using modified spiral resonators with interdigital structure

In this study, we propose a novel resonator that is composed of a modified spiral with an embedded interdigital capacitor. A large ratio of the first spurious frequency to the fundamental resonant frequency is obtained, which is suitable for the design of filters with wide stopbands, and the circuit size is considerably reduced by embedding the interdigital structure in the spiral. For demonstration, a compact four-pole high temperature superconducting(HTS) filter with a center frequency of 568 MHz is designed and fabricated on double-sided YBCO film with a size of 11.4 mm×8.0 mm. The filter measurement shows excellent performance with an out-of-band rejection level better than 60.9 dB up to 3863 MHz.     

基于P3HT给体的单/双受体平面异质结电池性能及其介电特性

为了研究分析界面电荷等特性对器件的影响,制备了基于P3HT给体的单/双受体平面异质结(PHJ)有机太阳能电池(OPV)。首先研究了P3HT膜厚、P3HT溶剂和P3HT膜层的干燥时间对器件性能的影响。为了提高P3HT/Sub Pc PHJ电池的性能,采用双受体的三元器件结构(P3HT/Sub Nc/Sub Pc),制备了结构为ITO/PEDOT∶PSS/P3HT/Sub Nc/Sub Pc/BCP/Al的三元瀑布型OPV器件并研究了Sub Nc层厚度对其性能的影响。结果表明,在二元器件(P3HT/Sub Pc)体系中,P3HT溶于氯仿和1,2-二氯苯混合溶剂,成膜后干燥10 min退火获得的器件性能最佳。在三元器件中,随着Sub Nc厚度的增大,器件光电转换效率(PCE)先增大后减小。当Sub Nc厚度为5 nm时,器件PCE达到最大。相比于二元器件,三元器件的各项性能得到明显提升。最后,比较研究了不同厚度Sub Nc薄膜对器件介电特性的影响。     

基于万维引擎平台的VR虚拟仿真实验自主开发——以模拟法测静电场实验为例

本文针对大学物理基础性实验,以模拟法测绘静电场实验为例,利用SolidWorks、3ds MAX、Unity及万维引擎软件平台,自主开发该实验项目的Virtual Reality(VR)虚拟仿真实验。通过实验模型建立、实验场景搭建、功能指令编辑、触发指令配置、程序设计与调试等步骤,还原该实验的线下操作与现象,辅助开展线上线下协同的教育模式。同时,使学生掌握虚拟仿真实验实际工程案例的整个开发流程,降低VR虚仿实验开发成本及周期,加深学生对所开发仿真实验的原理及内容的进一步理解,提高学生实验及理论学习质量,丰富本实验教学单位的仿真实验资源。     

偶氮金属螯合物的合成及其光学和热学性质

偶氮金属螯合物的合成及其光学和热学性质;噻唑基偶氮金属螯合物;光学性质     

Ku波段低温低噪声放大器设计

本文采用插指电容新结构设计了一个Ku波段低温低噪声放大器(LNA),并通过优化的封装工艺制备了放大器样品,分析了隔离器对LNA性能的影响.在77K温度下测试结果表明,放大器增益约10dB,噪声系数小于2.0dB,反射系数小于-17dB.