干涉测量用半导体激光器驱动电源

设计了一种可调制的高稳定度半导体激光器驱动电路。该电路的直流稳定度高达1.5×10-5，输出电流在0～200mA内连续可调，长时间工作（12h以上）电流变化小于1μA；在直流基础上注入100kHz～300kHz的调制电流，其调制深度为0～100mA连续可调，可实现在激光干涉测量中对光波频率和光波强度的调制。将该电路驱动的光栅外腔半导体激光器和辅助温度控制电路应用于光干涉测量技术中，得到了功率稳定、波长单一的激光输出，解决了激光器的跳模现象，完成了对远距离微小振动（纳米量级）的测量。     

光子结构函数的直接检验

本文基于喷注电荷截面方法,提出了一种直接测量光子结构函数的可行方案。 关键词：     

Particle Simulation of Relativistic Laser Pulse Density Channeling

Two-dimensional particle simulation is carried out to study the interaction between a high-intensity finite-size spot laser beam and a plasma with linear density profile. The laser is allowed to propagate in underdense corona until it is cut off near the critical surface. The intense laser can drive various instabilities through particle collective motion and result in electron heating,while relativistic effect and ponderomotive force can bring strong energy absorption and electron heating in the overdense region. As the laser beam is nonuniform in the transverse direction,a density channel forms and hole boring effect occurs as a result of strong ponderomotive force pushing particle outwards. These processes can be investigated well by particle simulation.     

MCM-41负载SO42-/ZrO2超强酸的性能研究

采用浸渍－焙烧法制备了ＭＣＭ－４１负载ＳＯ＾２－４／ＺｒＯ２（ＳＺ）超强酸催化剂，并考察了其织构性质及酸性的变化规律。结果发现，过高的ＳＺ负载量会引起ＭＣＭ－４１介孔结构的破坏，而负载量过低则不能产生超强酸性。     

算子权移位的换位代数的交换性

令T是以{Wk}∞k=1B(Cn)为权序列的内射算子权移位.设T是强不可约的,而且sup1k<∞‖W-1k‖< ∞.用A′(T)表示T的换位代数,radA′(T)表示A′(T)的Jacobson根.本文刻划了radA′(T)并且证明了商代数A′(T)/radA′(T)是交换的.     

酸度对CeCl3·nH2O晶体热分解过程的影响研究

采用热重-差式扫描量热法（TG—DSC）分析了不同酸度的盐酸-水合氯化铈饱和溶液中生成的CeCl3·nH2O晶体在空气氛围热分解脱水的过程，热分析表明酸度对CeCl3·nH2O晶体结晶形式有影响，氯化铈饱和溶液在盐酸中生成的CeCl3·nH2O晶体较商品CeCl3·nH2O晶体的热分解多一个恒温脱水失重的过程．X射线粉末衍射（XRD）结果表明此商品CeCl3·nH2O晶体为CeCl3·7H2O，盐酸-水合氯化铈饱和溶液中生成的CeCl3·nH2O晶体为含有不同个数结晶水的混合物．     

Synthesis, Crystal Structure and Luminescent Property of a Novel Pt(II) Complex with Weak Metal-metal Interaction

The title complex cis-bis(tetrahydrothiophene)-bis(nitrate) platinum(II), (tht)2Pt(NO3)2, was the reducing product from potassium hexachloroplatinate(IV) K2PtCl6 where the platinum is tetra-valenced. Crystal data for C8H16N2O6PtS2: monoclinic, space group P21/c, a = 9.8833(5), b = 8.6744(4), c = 18.6407(9) (A), β = 114.401(3)°, V = 1455.35(12) (A)3, Z = 4, Mr = 495.44, Dc = 2.261 g/cm3, F(000) = 944, μ = 9.950 mm-1, λ(MoKα) = 0.71073 (A), T = 293(2) K, 2θmax = 54.96o, GOOF = 1.033, R = 0.0350 and wR = 0.0785 for 2572 observed reflections with I > 2σ(I). X-ray diffraction studies reveal that the title complex has interesting weak metal-metal interactions and two molecules linked by metal-metal interaction exist as a group. Luminescent spectrum illuminates red emission of the complex at room temperature.     

高比探测率和高速石墨烯/n-GaAs复合结构的光电探测器

混合结构的石墨烯/半导体光电晶体管因其超高的响应度而备受关注。然而,该类光电晶体管通过源-漏电极测试得到的比探测率(D*)容易受到1/f噪声的限制。本文制备了混合结构的石墨烯/GaAs光电探测器,通过源-栅电极测得D*大约为1.82×10¹¹ Jones,与通过源-漏电极测量相比,D*提高了约500倍。这可归因于界面上肖特基势垒对载流子俘获和释放过程的屏蔽作用。此外,探测器的上升时间和下降时间分别是4 ms和37 ms,响应速度相应地提高了2个数量级。该工作为制备高比探测率和高速的光电探测器提供了一种新的思路。     

湿法脱硫浆液中Hg2+的还原机制研究

针对燃煤电厂湿法脱硫浆液中Hg²⁺易被还原的特性,研究Hg²⁺在模拟湿法脱硫系统中的迁移机制,考察了浆液温度、pH值以及SO₃^2-、Cl^-、Ca²⁺、Mg²⁺浓度等因素对Hg²⁺还原性能的影响。结果表明,Hg²⁺还原率随着浆液中SO₃^2-浓度的增大而降低;pH值对Hg²⁺的还原呈先增加后降低的趋势,在pH值为5.5时还原率最高;温度的升高不利于浆液中稳定的二价汞盐络合物存在,导致Hg²⁺还原率增加;Ca²⁺、Mg²⁺以及Cl^-浓度的增加有利于形成稳定化合物,从而抑制Hg²⁺的还原。