FORWARD GATED—DIODE METHOD FOR EXTRACTING HOT—CARRIER—STRESS0INDUCED BACK INTERFACE TRAPS IN SOI／NMOSFETs

The forward gated-diode R-G current method for extracting the hot-carrier-stress-induced back interface traps in SOI/NMOSFET devices has been demonstrated in this letter. This easy and accurate experimental method directly gives the induced interface trap density from the measured R-G current peak of the gated-diode architecture. An expected power law relationship between the induced back interface trap density and the accumulated stress time has been obtained.     

AN SVAD ALGORITHM BASED ON FNNKD METHOD

The capacity of mobile communication system is improved by using Voice Activity Detection (VAD) technology. In this letter, a novel VAD algorithm, SVAD algorithm based on Fuzzy Neural Network Knowledge Discovery (FNNKD) method is proposed. The performance of SVAD algorithm is discussed and compared with traditional algorithm recommended by ITU G.729B in different situations. The simulation results show that the SVAD algorithm performs better.     

AWG器件设计方法的改进和器件性能分析

采用2点及3点Stigmatic points方法设计阵列波导光栅（AWG）器件，对传统的Rowland圆结构设计做了改进。比较分析了传统设计和改进设计AWG器件的像差，讨论了阵列波导的接收孔径及输入光信号的等效高斯光束发散角对AWG器件性能的影响。指出了传统的Rowland圆结构设计在设计高通道数AWG器件时存在的边缘通道性能劣化问题，采用多点Stigmatic points方法设计能很好地解决这一问题。     

Luminescent Properties of Eu^3＋—Doped Yttrium Oxide Chloride Embedded in Nanoporous Glass

The photoluminescence of Eu^3 -doped yttrium oxide chloride embedded in nanoporous glass has been observed.In comparison with those in the powder phosphor,the emission lines of Eu^3 ions becom much broader and lueshift was observed in the lines due to ^5D0→^7F2 transitions and the Eu-O charge transfer excitation band.The ratio intensities of the ^5D0→^7F1 transitions to the ^5D0→^7F2 transitions of Eu^3 ion become higher and change at different excitation excitation wavelengths,such as 393nm and 254nm.The two excitation wavelengths belong to the 4f→4f transition of the Eu^3 ion and the Eu-O charge transfer,respectively,This material may be developed into a new luminescent glass.     

物质密度分布的数值回归计算

由物体的万有引力场分布，回归计算其密度分布。     

Bis（ortho—）chelated Monoanionic Bisphosphinoaryl Ruthenium（Ⅱ）Complexes：Synthesis,Characterization and Reactivity

Bisphosphinoaryl ruthenium(Ⅱ）compounds are synthesized using two distinct synthetic routes.One route,direct cycloruthenation,consists of the reaction of the parent arene compound R-PCHP with [RuCl2(PPh3)3]in chlorinated solvents.However,this route suffers from major drawbacks because HCl is formed as well as free triphenylphoshine.The other route,the transcyclometalation reaction,involves the interconversion of one cyclometalated ligand metal complex,[RuCl(NCN)(PPh3)],into another complex,[RuCl(R-PCP)(PPh3)],with concomitant consumption and formation of the corresponding arenes R-PCHP and NCHN,respectively.     

声光可调谐波波器多波长同时滤波的特性

集成光声光可调谐滤波器（AOFT）有很多优点，特别是它可以同时滤出多个滤长，因此在波分复用（WDM）光纤通信网络中有重要应用。针对其这种特性，运用耦合模理论，导出了同时存在两束声波时的严格的耦合模方程，在此基础上，得到滤波特性的数值解，分析了多波长同时运用时，滤波器的主峰强度，中心波长和3dB带宽随时间的波动，同时也分析了当信道间隔较小时滤波特性失真严重，噪声较高的原因，在分析了共线型声光可调谐滤波器多波长同时运用所存在缺点的基础上，提出利用准共线模转换器来改善声光可调谐滤波器多波长同时运用的性能。     

CCD相机在系统奈奎斯频率处的调制传递函数

调制传递函数是成像系统性能的重要参数，在进行CCD相机调制传递函数测试时，通常采用矩形靶标而非正弦靶标，使调制传递函数的测试值与相机系统实际调制传递函数值存在差异，本文对CCD相机在系统奈奎斯特频率处的调制传递函数测试结果进行了理论分析。