并行算法到并行结构的映射

本文以“匹配”法为基础，给出了新的目标函数，并以此设计映射算法，最后给出试验结果。     

A NUMERICAL METHOD FOR OPTIMAL INPUT DESIGN BY FREQUENCY DOMAIN CRITERIA

(1) Introduction Most of the existing literature on input design for identification has been concentrated on the problem of obtaining accurate parameter estimates. Many of them discussed how to determine optimal inputs which minimize a scalar valued function of the inverse Fisher information matrix.The minimization has been performed under certain constraints to prevent the diverge of the input or output amplitude.     

EFFECT OF SIMULATED WEIGHTLESSNESS ON THE RESPONSE CHARACTERISTICS OF HUMAN BRAIN

In order to systematically investigate the effects of simulated weightlessness on thefunction state of human brain, 15° head-down tilt (HDT) was used to simulate weightless-ness, and the response changes of event-related EEG power spectra, medium-frequencysynchronous potentials and slow-waves were examined in the present study. It was foundthat HDT had characteristic effects on the above EEG responses, suggesting that the ef-fects mainly occurred in the brain's regulatory system, therefore, resulting in changes ofthe brain function state.     

核计算技术在核测井中的应用

本文介绍了核计算技术在核测井中的应用概况及其具体应用实例。     

含硫配体在ZnS：Cu水溶胶制备中的应用

体相ＺｎＳＣｕ具有优越的交直流电致发光性能，在屏幕显示领域有着广泛的应用［１］．近年来随着ＺｎＳＭｎ纳米材料研究的深入［２～４］，对于纳米ＺｎＳＣｕ的研究也引起了人们极大的兴趣［５］．但研究进展十分缓慢，主要原因一是由于其中的掺杂元素以Ｃｕ（Ⅰ）的形...     

甘油对白酒中甲醇含量测定的影响

应用水浴控温(<90℃)蒸馏,可消除化学比色法测定白酒中甲醇含量时甘油的干扰,效果良好。     

循环伏安法研究Ba2YCu3O7—y超导体

本文利用电化学循环伏安法(CV 法),以饱和 Ba(OH)_2水溶液为电解液,对单相Ba_2YCu_3O_(7-y)正交和四方结构超导体进行了研究.结果发现:在典型的正交相中确实存在Cu~(3+)→Cu~(2+)的还原峰,而四方相则无此峰出现.从而首次直接检测到 Ba_2YCu_3O_(7-y)烧结体中 Cu~(3+)离子.     

Continuous-wave operation of InAs/InP quantum dot tunable external-cavity laser grown by metal-organic chemical vapor deposition

We demonstrate high-performance broadband tunable external-cavity lasers(ECLs) with the metal-organic chemical vapor deposition(MOCVD) grown In As/In P quantum dots(QDs) structures. Without cavity facet coatings, the 3-d B spectral bandwidth of the Fabry–Perot(FP) laser is approximately 10.8 nm, while the tuning bandwidth of ECLs is 45 nm.Combined with the anti-reflection(AR)/high-reflection(HR) facet coating, a 92 nm bandwidth tuning range has been obtained with the wavelength covering from 1414 nm to 1506 nm. In most of the tuning range, the threshold current density is lower than 1.5 k A/cm2. The maximum output power of 6.5 m W was achieved under a 500 m A injection current.All achievements mentioned above were obtained under continuous-wave(CW) mode at room temperature(RT).     

用摄动法建立边界层方程

用摄动法建立边界层方程王培光，王振东（河北大学数学系，保定０７１００２）（天津大学力学系，天津３０００７２）边界层理论是普朗特（１８７５－１９５３年）对流体力学的最主要贡献之一，也是黏性流体力学重要的基础性理论．１９世纪末，流体力学沿着两条看来似无关...