用半导体激光器实现50KV脉冲波形安全测量方法的研究

一种可确保人身和设备安全的高压脉冲波形的测量方法。它由发送电路将被测电压或电流之实时值转换成串行数字信号，再用它调制半导体激光器发出的光，其湛我穿过100mm以上变压器油和10mm厚玻璃板，送给接收电路。后者将串行数字信号转换成模拟信号，然后送给示波器，即可观察到被测高压脉冲电路电压或电流的波形。所述方法新颖实用，具有参考价值。     

电力自动化无线通信网络的分析与研究

无线传感器网络以及无线网状网络是被运用最多,同样也是技术最成熟的技术。因此,本文对电力自动化系统中无线通信网络技术的优点和使用进行了阐述。希望对今后的研究有所帮助。     

一种新型同轴磁控管调频机构的设计

根据同轴磁控管的工作原理,介绍了一种新型磁控管调频机构,分析了磁控管对带电机减速器的特殊要求,并着重介绍了它的工作原理及结构特点。     

Influence of lattice symmetry and hole shape on the light enhanced transmission through the subwavelength hole arrays

The golden films with various subwavelength hole arrays on the film surface are designed and fabricated on glass substrate by electron beam lithograply （EBL）, focused ion beam （FIB）, and reactive ion etching （RIE）, respectively. The influences of the hole array symmetry and the hole shape on the light-enhanced transmission through the films are observed and simulated. The experimental results show that when the array lattice constant and the hole diameter are the same in the different array structures which are 1 μm and 350 nm respectively, the square hole arrays exhibit two transmission peaks at 1170 nm and 1580 nm with the transmissivities of 3% and 6%, respectively, while the hexagonal hole arrays exhibit an enhanced peak of 14% at 1340 nm; when the lattice constant and the duty cycle are the same for different array stucture,.the transmission peaks are different for different hole shapes, which are at 763 nm with transmissivity of 12% for rectangular holes and at 703 nm with the one of 9%, respectively The numerical simulation results by using the transfer matrix method （TMM） are consistent with the observed results.     

Pekeris声波导情况下海深不确定性对简正波群速度反演海底声速的影响研究

简正波群速度广泛应用于海底参数反演,海深不确定性对反演结果有较大影响.为了减小海深测量误差对反演结果的影响,本文通过理论分析和仿真计算对Pekeris声波导情况下正则简正波群速度随海深和海底声速的变化规律进行研究,结果表明当所选取的频率处于某号简正波的Airy频率附近时,该号简正波的群速度对海深变化不敏感,而比同频率的...     

低温水热前驱物技术制备单晶PbS纳米片

以层状的铅(Ⅱ)-硫脲配合物为前驱体，在130 ℃反应12 h水热分解得到高产量的半导体单晶PbS二维纳米片，产品用XRD、TEM、SEM、ED、XPS进行了表征，单晶PbS纳米片的二维尺寸为0.6～3 μm，厚度为2～4 nm，沿着ab平面生长。紫外吸收光谱和光致发光光谱表明二维PbS纳米片的量子尺寸效应非常显著。对可能的生长机理进行了探讨。     

一种芴酮衍生物的合成、晶体结构及其光限幅性能

一种芴酮衍生物的合成、晶体结构及其光限幅性能;芴酮衍生物; 单晶结构; 光限幅性能     

高分子辅助水热制备单晶碲纳米管

Te single-crystal nanotubes were synthesized using Na₂TeO₃ and (NH₂)₂CS as starting materials and pol-yacrymide (PAM) as morphology-director under hydrothermal conditions. The obtained products were characteri-zed by XRD, FESEM, SEM and TEM techniques. The results show that Te nanotubes grow along c axial with the inner diameters of 100～500 nm, wall thickness of 80～160 nm and lengths of 5～10 μm. A possible mechanism for the growth of Te nanotubes was discussed.     

狂野不羁的任性女星——安吉丽娜·朱莉

1999年,应该说是安吉丽娜·朱莉(A g elinaJolie)最为风光的一年。继饰演《失魂少女》一片中丽莎一角,夺得全球奖最佳女配角奖之后,她再次凭此角荣获第72届奥斯卡最佳女配角殊荣,片中丽莎性情乖戾难驯,喜怒无常,她有火的热情和超人的魅力,却把肆意践踏社会的道德秩序当成乐趣。朱莉把情丰富的心,也许她正是用不加掩饰的表面方式,来保护自己不受伤害。因为除了用离奇古怪的行为占据自己的生活外,朱莉害怕动荡不安的感觉。她用这种方法来掩盖自己。所以朱莉20岁便结了婚,但很快又离了婚,正是这段很短暂而重要的人生经历,促使朱莉原谅了父亲,并踏入好莱坞的世界。     

The influence of hole shape on enhancing transmission through subwavelength hole arrays

The extraordinary light transmission through a 200-nm thick gold film when passing through different subwavelength hole arrays is observed experimentally. The sample is fabricated by electron beam lithography and reactive ion etching system. A comparison between light transmissions shows that the hole shape changing from rectangular to diamond strongly affects the transmission intensity although both structures possess the same lattice constant of 600,nm. Moreover, the position of the transmission maximum undergoes a spectral red-shift of about 63,nm. Numerical simulations by using a transfer matrix method reproduce the observed transmission spectrum quite well.