层状结构钒磷酸盐（pipzH2）2[（VO）3（HPO4）2（PO4）2]·H2O的水热合成及热稳定性研究

水热合成了钒磷酸盐体系中少有的结构中具有多面体共棱连接的层状孔道结构化合物（pipzH2）2[（VO）3（HPO4）2（PO4）2]·H20的纯相。用ICP、单晶XRD、TG-DTA、粉晶XRD和SEM对产物进行了表征。结果表明，化合物在空气中开始失重的温度为274℃，随着温度的升高，化合物中有机分子分解，同时伴随着重结晶过程，但晶体的外观形貌保持不变直至有机部分分解殆尽。相变过程分析和与模板相同的（pipzH2）0.5[（VO）（PO4）]的热稳定性对比研究表明，有机模板的稳定性及分解过程不但影响化合物的热稳定性和热变化过程，还影响原晶体微形貌的保持；无机骨架结合的牢固程度在很大程度上影响化合物的热稳定性。     

DVD+RW刻录机准生产系统解决方案

DVD刻录机市场正在迅猛增长,2003年的复合平均增长率超过120％,估计总的市场规模超过400万台,2004年整个市场规模会超过1千万台。随着刻录机价格迅速下降,整个生产量也会得到很大的提升。 而DVD播放机市场已经基本接近饱和,以后会逐步下降,取而代之的将是DVD刻录机的产品。DVD市场还有一个分支产品,就是DVD刻录机与DVD家庭影院的结合:Home Theater in Box(HTIB)产品。“Home Theater inBox”就是把DVD刻录机和家庭的功放部分连接一起,构成的一个市场。这个市场目前很小,2003年的市场估计     

InP基应变补偿结构偏振不灵敏半导体光放大器制作的研究

为了制备偏振不灵敏的半导体光放大器(SOA)，将有源区设计为由4个压应变、3个张应变阱层及晶格匹配的垒层InGaAsP交替组合而成的应变补偿结构。器件做成带有倾角的扇形脊形波导结构，避免了常规制作SOA的复杂工艺。对样品3在80～125mA电流范围内，获得了偏振灵敏度≤0．6dB．最小可达0．1dB；较大的电流范围内FWHM值为40nm。     

Experimental Research on Erbium-doped Superfluorescent Fiber Source

The effects of the variations in fiber length, fiber mirror reflectance on efficiency and output power are experimentally investigated for erbium-doped double pass backward superfluorescent fiber sources (SFSs). The influence of fiber length on mean wavelength stability (MWS) has also been demonstrated. By incorporating a short section of un-pumped erbium-doped fiber (EDF) at the output port, the pump power dependent on MWS becomes independent of pumped EDF length. This is a novel phenomenon that hasn‘t been reported up to now,and should be helpful to SFS fabrication and theory analysis. By using a fiber Michelson interferometer as spectrum slicing component,a multi-wavelength fiber source (MWFS) with ～20 channels (from 1542nm to 1559nm) is got. The MWFS has a channel spacing of ～0. 8 nm which satisfies ITUstandard. The intensity fluctuation among channels is less than 0.5dB,and the extinction ratio of all channels is above 14dB. This kind of MWFS should be useful to wavelength division multiplexing systems.     

一种前馈型全摆幅恒跨导准恒增益CMOS运放设计

设计了一种适合在低电源电压下工作的前馈型输入级放大结构，在全摆幅的动态工作范围内，输入级跨导保持不变，采用负载电流补偿以保证增益近似恒定，输出采用前馈型AB类输结构，实现全摆幅输出。     

当心！它会咬人——浅析、试听美国AudioQuest COPPERHEAD绞腹蛇信号线

美国AudioQuest线圣是享誉世界的音响线材厂商，踏入发烧罔的发烧友，大多对AudioQuest线圣品牌相当熟知，该厂的线材从普及型弓‘的纯铜线到昂贵的银线系列，都有较大的市场占有率，特别是普及型线材，以其优秀的声音表现和极高的性价比而拥有众多的用家，如现已停产，众发烧友仍使用并津津乐道的平价信号线Turquoise(绿松)、     

组织合作中关系专用性投资最优水平分析

本在以往研究的基础上对关系专用投资的价值创造功能作了进一步的讨论，分析了其创造准租金收入的机理和一般表示，在此基础上结合以往交易成本经济学对关系专用性投资的认识以及其作为沉没成本的特征，从效用最大化的角度建立了两个成员的联盟中关系专用性投资的决策模型，分析了关系专用性投资创造准租的具体特征对投资水平的影响。     

Fabrication of Compound Lattice by Holographic Lithography

Some compound lattices in photonic crystals with large complete photonic band gaps, such as the diamond structure and the two-dimensional hexagonal compound structure, is desired for fabrication. A novel method for fabrication of compound lattices by holographic lithography is reported. The key point is phase modulation by photoelectrical control and multiple-exposure techniques. This technique introduces many advances: for instance,using the same coherent beams and without changing the position of the sample during multiple-exposure.     

Spectral property and its shape transition on ^72-84Kr isotopes in microscopic core plus two-quasiparticle approach

By using a microscopic sdIBM-2 2q.p, approach, the levels of the ground-band, 7-band and partial two-quasi-particle bands for ^72-84Kr isotopes are calculated. The data obtained are in good agreement with the recent experimental results, and successfully reproduce the nuclear shape phase transition of ^72-S4Kr isotopes at zero temperature.The ground-state band is described successfully up to J^π=18^ and Ex=10.0MeV. Based on this model, the aligned requisite minimum energy has been deduced. The theoretical calculations indicate that no distinct change of nuclear states is caused by the abruptly broken pair of a boson, and predict that the first backbending of Kr isotopes may be the result of aligning of two quasi-neutrons in orbit g9/2, which galus the new experimental support of the measurements of g factors in the ^78-86Kr isotopes.     

5W至200W多相升压型DC／DC转换器：多相升压型转换器相比其单相同类器件有哪些改进？

首先，多相拓扑结构可通过去除体积庞大、难以布设的组件并代之以易于安装的扁平组件来节省占用空间，并简化电路板布局。