短波FH／MFSK编码系统中部分频带噪声阻塞的性能

研究了带反馈链路的选择式频率分集的短波信道ＦＨ／ＭＦＳＫ编码系统，在具有加性白高斯噪声（ＡＷＧＮ）的瑞利衰落信道中，存在部分频带噪声阻塞时的性能，给出了采用ＲＳ码、双－ｋ码、重发码时，无编码和有编码系统的码符差错率与比特能量噪声比的关系曲线．     

On the notion of cobordism for bounded manifolds

The usual concept of cobordism is concerned with closed manifolds. In this paper, we generalise the concept of cobordism to the extent of bounded manifolds and obtain a homotopy theorem similar to the theorem of Thom. Supported by the National Natural Science Foundation of China and partially supported by a grant of Zhejiang Natural Science Foundation.     

积分微分方程Runge-Kutta方法的散逸性

本文针对一类积分微分方程讨论Runge-Kutta方法的散逸性,当积分项用PQ公式逼近时,证明了(k,l)-代数稳定的Runge-Kutta方法是D(l)-散逸的.     

A rapid method for isolation of human hemoglobin benzo[a]pyrene diol epoxide derived adducts using high performance liquid chromatography

A method is described to isolate rapidly human hemoglobin-benzo[a]pyrene diol epoxide adducts. A combination of 300 A pore size C4 reversed phase HPLC to effect separation of adducted protein from native protein, and mu-bore C18 reversed phase HPLC to isolate and partially characterize proteolytic peptide adducts (by UV), was used.     

高效液相色谱分离催化伏安检测微量稀土元素——钆、铽、镝、钬、铒

本文提出用Ag(Hg)-Pt-Ag三电极流动微电解池检测高效液相色谱柱流出液中痕量稀土的浓度。用Apple-Ⅱ微电脑采集伏安信号,再转换成色谱流出曲线。稀土元素的检测限可达0.5μg。     

Optical Implementation of Bit-slice Full Adder by Using a Single Electron Trapping Device

1.IntroductionDuringpastdecades,therehavebeenmanyproposalsforimplementingopticalParallelbinarylogicalprocuring.Thesemethodsmaybedividedintotwocategoriesaccordingtothenonlinearityintheprocessingsteps[1].(i)LinearencodingofinputvariablesandlogicoperationsarePerformedbymeansofnonlinearopticaldevices,suchasSSEEDslz].(n)NonlinearspatialencodingofvariablesandlogicoperationsPerformedbylinearopticalsystems,suchaspolarizationencodinginanimagingsystem['J,spatialcellcodinginashadow-castingsystem[4),t…     

Magnetic Field Modulated Direct Overwrite with Continuous Wave LaserIrradiation for Magnetic-optic Disks

1.IntroductionAtpresent,therearetwokindsofpracticalrewritableopticalstorage:phase-changeoptiCalandmagneto-opticalstoraged].Magneto-opticaldatastorageisattractiveformassdatastoragebecauseofitshighrecordingdensityandthecontinuouslyincreasingdatatransferrate.DirectoverwriteisapromisingschemetoobtainhighdatatransferratellJ.Magneticfieldmodulation(MFM)andlightintensitymodulation(Lin)arethemajormethodstorealizemagneto--opticaldirectoverwrite[2-8].InLIM,pulsedlaserintensityismodulatedaccordingtot…     

ATM交换机的多维TORUS网络的一个路由控制算法

提出了基于当今高性能多计算机系统中最流行的拓朴结构──多维ｔｏｒｕｓ（或称Ｋ”立方体）网络的一个路由控制算法，该算法理论上保证无死锁，而且在节点参与网络通讯方面，也基本上是公平的。     

Structure and magneto-optical properties of “porous silicon-cobalt” granular nanocomposites

The structural and magneto-optical properties of “porous silicon-cobalt” nanocomposites prepared through electrochemical deposition on silicon substrates of different porosities are investigated. It is revealed that, under galvanostatic conditions, cobalt micrograins are formed only in a surface layer of porous silicon. The greater the pores in silicon, the larger the mean size of the ferromagnetic micrograins. The nanocomposites thus fabricated possess ferromagnetic properties and, at specified compositions, are characterized by anomalously large magnitudes of the equatorial or transverse magneto-optical Kerr effect (TMOKE). The magneto-optical properties of the nanocomposites are simulated in the Bruggeman effective-medium approximation. It is shown that the anomalous negative transverse magneto-optical Kerr effect is associated with the oxidized state of porous silicon in the vicinity of the ferromagnetic metal micrograins.