双轴亚铁磁粒子中的量子位相干涉

本文研究了外磁场沿难磁化轴和中间磁化轴所在平面上任意方向时,亚铁磁颗粒中的量子位相干涉。     

Investigation on the synthesis mechanism of β-FeSi2 prepared by pulsed laser deposition

The FeSi2 target alloy was fabricated by conventional powder metallurgy technology, and then, β-FeSi2 thin films was successfully prepared by pulsed laser deposition (PLD). X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) were used to characterize the structure, composition, and their changes in the process of β-FeSi2 preparation. In addition, a laser sintering process was also employed to prepare FeSi2 alloy. The analysis of radiation heat transfers in different-sized FeSi2 melt indicates that the cooling rate of the melt depends on the size, i.e., the cooling rate of the micron sized melt is 103 times greater than that of the millimeter-sized melt. The product α-FeSi2 by laser sintering and β-FeSi2 by PLD reveals the different phase transition process in crystallization of milli-meter-sized and micron-sized (or submicron-sized) FeSi2 melt. The results of PLD preparation process shows that β-FeSi2 could be pre-pared through a liquid-phase sintering, followed by a rapid cooling.     

一种电源扩展动态规划模型与算法

对电源长期扩展规划进行了探讨,建立了电源长期扩展动态规划模型,提出了解算该模型的方法——两步规划法,并对例样系统进行了优化试算。     

液相用表面声波化学传感器的理论与应用

表面声波化学传感器具有较高的灵敏度和检测精度，但目前只能用于气相分析。本文报道了液用表面声波传感器及其应用于液相体系的检测，并导出了相应的理论响应公式。该传感器对溶液电导率和介电常数有灵敏响应，而且在伴存电解质存在时，测定结果更精确。此工作为表面声波器件在液相体系的应用提供了新的途径。     

针刺麻醉与镇痛泵在肩关节术后镇痛领域中的应用及评价

以行肩关节手术的患者作为研究对象,比较和评价了针刺麻醉与肩峰下自控型镇痛泵对术后镇痛的疗效与安全性,指标包括疼痛视觉模拟评分（VAS）、肩关节活动度（ROM）、Lovett肌力分级等,结果显示镇痛泵组的胃肠道不良反应发生率（7/64）、基础病复发率（4/64）,及总体不良反应发生率（16/64）均显著高于针刺组（0/70）(0/70)(4/70),在轻度疼痛者中,2组的VAS未见差异,但针刺组的ROM更大,在中、重度疼痛者中,镇痛泵组的VAS低于针刺组,但2组的ROM及肩关节肌力未见差异,说明针刺麻醉的安全性极佳,可促进术后康复,适用于轻度疼痛者及合并相关内科基础病的中、重度疼痛者。     

Growth ages of ferromanganese crusts from the western and central Pacific： Comparison between nannofossil analysis and ^10Be dating

Based on results of nannofossil analysis and 10Be dating in ferromanganese crusts M1-1 and A1-1 (no nannofossils were found in it),from the western and central Pacific respectively,it is found that the crust growth ages from nannofossil biostrati-graphy agree well with those based on 10Be isotope analysis. Both crusts have three growth layers,and the oldest layer was deposited in Miocene at about 12.80 Ma. The maximum,minimum,and average growth rates of crust A1-1 (from the central Pacific) are 8.11,1.92 and 3.47 mm/Ma,and those of crust M1-1 (from the western Pacific) are 2.93,0.47,and 0.94 mm/Ma.     

Performance evaluation of the fixed relay in OFDMA systems

Performance of fixed relays in orthogonal frequency division multiple access (OFDMA) systems, especially the coverage and capacity performance at the cell edge, is evaluated in this paper.Two methods, theoretical analysis and calculation and Monte Carlo simulation, are used for the evaluations.By theoretical analysis and calculation, frequency efficiency equation of a relay is introduced and numerical results are calculated.Monte Carlo simulation results also verify that the calculation method is reasonable.The evaluation shows that a relay can increase system performance to a certain level if it is designed appropriately, otherwise it will be harmful for the system performance, even to reduce it.     

略论杜甫对屈原的继承和发展

屈原的《离骚》被认为是中国浪漫主义文学的源头。杜甫继承了《诗经》的风格,把现实主义诗风发挥到了极致,是现实主义诗风的代表者。二人虽风格不同,但是通过对比,我们不难发现他们在时代环境、人生经历、性格理想、爱国精神、表现手法等方面有许多相似之处。无疑,生于后世的杜甫,对屈原的精神和遗产是有所继承和发展的。     

基于引文分析法的我院重点学科文献资源建设研究

本文运用文献计量学方法,对华北科技学院安全技术及工程学科科研人员2004—2008年间的110篇核心期刊论文的引文量、引文类型、引文语种、年代分布等进行统计与分析,旨在了解科研人员文献需求特点,为重点学科文献资源建设提供参考。     

中部地区中小学教师教育公平意识的调查与研究

本研究采用自编问卷对中部六省的600名中小学教师的教育公平意识进行了问卷调查,调查的内容包括教师对学生的关注、对学生的评价、对学生进行教育资源的分配和教育公平感等四个维度.调查结果显示,不同性别、不同学历、不同教龄,不同学段和不同区域的教师在教育公平意识上存在一些差异.这些差异在一定程度上表现了当前中部地区中小学教师教育公平意识状况,并有其内在的原因.