有限差分波束传播法应用于含有耦合的波导问题的研究

将有限差分波束传播法 (FD- BPM)运用于含有介电张量非对角元的二维波导问题 ,并由两个算例给出了 TM与 TE模耦合的转换过程 ,从而进一步论证了有限差分波束传播法完全优于快捷傅立叶波束传播法 (FFT- BPM) .     

Stabilization of parallel (recombinant) triplex with propidium iodide

Acquisition of adequate patient data for clinical management is hard enough, but higher quality patient data are needed for clinical audit and research. This article discusses some of the problems of using routine clinical data for audit and research, aspects of data quality, sources of audit or research data and their problems, methods for improving data quality, the benefits and problems of computer-based systems and current trends in the capture and processing of clinical data.     

中速数字(IDR)通信

本文介绍了目前卫星通信网络中主要通信方式之一——中速数字(IDR)通信技术。着重介绍了各次群的复接方式,简单地介绍了数字倍增及多址技术。     

海湾战争后火控系统的发展趋势

本文从海湾战争后武器装备的改进情况谈起,详述了弹炮合一防空武器系统、地炮火控系统、坦克火控系统以及大闭环控制等新的发展趋势。     

海湾战争后光电武器装备的发展动向

本文论述了海湾战争后世界各国光电武器装备的发展计划与技术改进情况,并对红外焦平面阵列和光电对抗技术的发展作了介绍。     

Variability of biochemical gene markers in residents of the city of Tomsk

Variation of seven biochemical gene markers (Tf, Gc, Hp, ACP1, PGM1, PGD, and EsD) in the population of Tomsk was examined. The genetic structure of this population is compared to that of other urban populations from different regions of Russia.     

海湾战争中C~3I的经验、问题及战后动态

本文首先从海湾战争中C~3I系统的层次结构谈起,进而论述了交战双方C~3I系统的成功经验与存在问题,并且重点研究了战后外军C~3I的发展动态、设备改进、政策调整等各方面情况。     

回转窑轴向下滑的接触力学问题

通过对接触区的应力、应变分析，推导出回转窑轴向下滑的计算公式，用接触力学方法解释了回转窑下滑现象。利用所推导的公式能够对回转窑轴向运动速度进行定量计算。     

小型铝厂电解槽用螺旋压紧式圆盘卡具的设计

本文详细设计了一种新型的螺旋压紧式圆盘卡具的设计及其特点。     

Effects of single oral administrations of haloperidol and d-amphetamine on prepulse inhibition of the acoustic startle reflex in healthy male volunteers

The effects of acute administration of an indirect dopamine-agonist, d-amphetamine, and a non-selective dopamine receptor antagonist, haloperidol, were investigated in normal male volunteers on habituation and prepulse inhibition (PPI) of the acoustic startle reflex in two experiments. In Experiment 1, 40 male non-smoker volunteers were tested for habituation and PPI (defined as percentage reduction of the pulse-alone amplitude; prepulses 9 dB above background) before and after double-blind administration of either 2 mg haloperidol or placebo. No influence of haloperidol was observed on either habituation or PPI of the startle reflex in this experiment. In Experiment 2, 60 male volunteers underwent startle testing before and after double-blind administration of a single oral dose of 5 mg haloperidol, 5 mg d-amphetamine or placebo. Habituation and PPI (prepulses 15 dB above background) for the placebo group did not differ significantly from that observed for the d-amphetamine or for the haloperidol group. However, in a subgroup of smoking subjects, both d-amphetamine and haloperidol reduced PPI as compared to that observed prior to drug administration. The implications of these findings in relation to animal pharmacological studies and observed sensorimotor gating deficits in schizophrenia are discussed.