锌锰干电池两种代汞缓蚀剂

通过浸泡实验,极化测量考察了在26％NH_4Cl溶液中BiCl_3、有机复合物MA对锌的缓蚀性能,并与HgCl_2的情况进行了对比。结果表明铋类似于汞同为阴极型缓蚀剂,但其适用的浓度范围较窄,在有氧存在时失去缓蚀作用。MA则为阳极型缓蚀剂,有较宽的浓度适用范围,在有氧存在的条件下,仍表现较好的缓蚀作用。     

关于运用逐差法处理物理实验数据时逐差间隔的最佳选取问题

本文对运用逐差法能减小多项式函数数据处理误差的机制和原因,从误差理论的角度出发运用数学手段结合实例进行了探讨,提出了逐差间隔选取的等效原则。对逐差间隔数的最佳选取问题根据误差理论加以数学分析作了比较详尽的论证,并以若干实例证实了结论的正确性。最后在比较物理实验数据处理诸方法优劣的基础上提出了应用各种方法的适宜条件和范围。     

共掺Tb,Gd偏硅酸钙(CaSiO3)的发光性质

采用高温固要反就法合成出单掺Tb和共掺杂Tb,Gd的CaSiO3多晶粉末样品，研究了其发光性质。在365mm下激发CaSiO3:Tb在可见光区具有由^5D4-^7F6跃迁引起的蓝光发射和由^5D4-^7F5跃迁引起的绿光发射，随着Tb^3 离子浓度的增加^5D3能级发生猝灭而增加^5D4能级的发射。共掺杂样品由于Gd^3 离子的加入，极大的提高了Tb^3 的发光强度，由于能级匹配，Gd^3 离子通过无辐射共振能量传递敏化Tb^3 的变化。     

电力市场中的黑启动服务

在电力市场的背景下，黑启动辅助服务是保证系统安全可靠供电的重要和必要手段之一。文中描述了黑启动的目标、形式，通过对黑启动机组的选择以及提供黑启动服务所需工作的讨论，提出了黑启动服务费用的计算、收取和支付方法，并指明了参与黑启动服务的各方在提供服务的过程中的权利和义务。对电力市场条件下的黑启动服务进行了较为系统的描述，对当前各区域电网建立电力市场、提供黑启动辅助服务具有一定的参考价值。     

制备条件对Ge2Sb2Te5薄膜电学性能的影响

研究了磁控溅射制备Ge2Sb2Te5薄膜时，制备条件诸如功率、气压等对薄膜性能的影响. 主要通过测量薄膜方块电阻随退火温度的变化情况，探索Ge2Sb2Te5薄膜的成长机理. 实验结果表明，不同溅射功率下制备的薄膜经不同温度退火后方块电阻没有明显的区别，而随着溅射气压的上升，薄膜方块电阻随退火温度的增加，下降的速率增加，意味着由面心立方结构转变为六方结构所需的结晶温度降低     

掺铕稀土配合物的光学树脂荧光光谱研究

报道了将多种稀土铕配合物复合于苯乙烯(ST)／甲基丙烯酸(HMA)的共聚体系,研究了含稀土配合物透明光学树脂的光学性能。发现其具有发光效率高,光谱呈现尖锐的线状谱带及相对于纯稀土配合物粉末来说掺有稀土配合物的光学树脂的发射产生光谱红移等特点。特别是用电子云重排效应(当中心稀土离子与不同配体结合时,其相同的J能级间的跃迁谱带位置略有移动的现象)解释了掺有稀土配合物的光学树脂发射光谱红移现象。并推断出在含稀土配合物复合于光学树脂后。稀土中心离子和配位原子间距离有所减小。     

Capillary electrophoresis coupled with electrochemiluminescence detection using porous etched joint

A new setup to couple capillary electrophoresis (CE) with electrochemiluminescence (ECL) detection is described in which the electrical connection of CE is achieved through a porous section at a distance of 7 mm from the CE capillary outlet. Because the porous capillary wall allowed the CE current to pass through and there was no electric field gradient beyond that section, the influence of CE high-voltage field on the ECL procedure was eliminated. The porous section formed by etching the capillary with hydrofluoric acid after only one side of the circumference of 2-3 mm of polyimide coating of the capillary was removed, while keeping the polyimide coating on the other part to protect the capillary from HF etching makes the capillary joint much more robust since only a part of the circumference of it is etched. A standard three-electrode configuration was used in experiments with Pt wire as a counter electrode, Ag/AgCl as a reference electrode, and a 300-microm diameter Pt disk as a working electrode. Compared with CE-ECL conventional decoupler designs, the present setup with a porous joint has no added dead volume created. Moreover, the dead volume can be increasingly decreased by shortening the distance ( approximately 100 microm) between the working electrode and the end of the separation capillary. The versatility in choice of capillaries and separation buffers within this design is the main advantage over the use of small i.d. capillary and low conductivity buffer in some CE-ECL systems. The performance of this setup is illustrated by the analyses of tripropylamine and proline.     

基于嵌入式的ATP车载子系统设计

借鉴城市轨道交通中ATP的设计思想,结合先进的通信手段,提出了一种基于嵌入式的辅助列车防护车载子系统的设计方案。该方案采用ARM DSP的硬件结构,并结合GPS、GSM-R、CAN总线等通信手段来实现列车的超速防护,从而为改善高速铁路的安全运营提供了有力的保障。     

Relationship between Crystal Structure and Luminescence Properties of （Y0.96-x Lnx Ce0.04 ）3 Al5 O12 （LH=Gd,La, Lu） Phosphors

The doping effects of La^3＋, Gd^3＋ and Lu^3＋ on the crystal structure and luminescence properties of （Yo96-x LnxCe0.04）3Al5O12（Ln = Gd, La, Lu） phosphors were studied. The X-ray diffraction patterns presented that with the inerease of the doping concentrations of La^3＋ and Gd^3＋ ions, the d-value of （Y0.96-xLnxCe0.04）3Al5O12 （Ln = Gd, La） inereased and the larger the doping ion, the stronger the effect would be. The doping amount causing phase transition in （Y0.96-xLnxCe0.04）3Al5O12 decreased with the inerease of the ionic radii of the doping lanthanide ions （La^3＋： 0.106 nm, Gd^3＋： 0. 094 nm, Lu^3＋ ： 0.083 nm）. The bigger doping ion of Gd^3＋ made the emission of （Y0.96-xGdxCe0.04）3Al5O12 move to red spectral region, but the smaller one of Lu^3＋ made it blue.     

500kV变压器中性点备用小电抗器运行方案探讨

对我国现行500kV变压器中性点经小电抗器接地运行方案进行了介绍。由于不允许中性点具有不同接地方式的变压器并联运行,小电抗器维修将迫使该变压器停运,带来不必要的经济损失。也使零序网发生不必要的改变。这是它的不足。为使小电抗器维修时变压器停运时间尽可能短,提出了公共备用小电抗器运行方案,并论述了运行原则。从调度、运行、继电保护角度看,问题被简化。从实用角度,提出了电动隔离开关的一种自动切换方法,结合备用小电抗器投入和退出原则进行了较详细的说明。