无源微地震法储层裂缝监测技术在双河油田的应用

利用无源微地震波储层裂缝监测技术,从裂缝分布、走向以及地应力的方向等角度出发,总结出了双河油田江河区Ⅶ油组下层系裂缝发育规律,继而分析了裂缝研究结果在Ⅶ油组下层系注采调整、动态调配以及提高注水效果等方面的应用。     

钌络合物的非线性光学性质和与DNA结合的光谱研究

报导对一组[Ru(bpy)2L]2+络合物的光谱特性和非线性光学性质的研究。其中bpy=2,2-bipirdine,l=imidazo[f]1.10-phenanthroline(IP),or2-pheny-limidazo[f]1,10-phenanthline (PIP)or PIP的衍生物。采用时间分辨的ns激光对这组Ru络合物在含水溶液中和与DNA结合的发光特性进行研究。实验结果表明,当在L上结合不同电子施主或受主基时,对[Ru(bpy)2L]2+的MLCT的发光强度和寿命都有很大的影响,同样DNA的插入也对此有影响。采用四波混频方法对其非线性光学特性进行了测量,由此推算出三阶极化系数和分子的三阶超极化系数。并讨论了不同配体对三阶非线性光学系数的影响。     

基于梁式引线管的射频信号检波装置设计

针对射频信号的幅度检测,设计一种应用于L、S、C波段的射频信号的检波装置.分析了梁式引线管的结构特征及其优秀的频率特性,将梁式引线管应用到射频信号检波中,并通过对检波输出进行校准的方法,得到精确的信号幅度.通过实验数据,给出了本检波装置中各元件参数对检波输出的影响,提供了电路在实际构建过程中的器件选型标准.并给出了本检波装置的误差校准方法.     

涂层材料激光剥蚀电感耦合等离子体质谱深度剖析进展

不同组成和厚度的涂层材料能够满足使用均质材料不能满足的关键需求,因而受到了越来越多的关注,因此需要发展一种快速准确的深度剖析技术以对涂层材料的元素组成和分布情况进行表征。文章主要介绍了激光剥蚀电感耦合等离子体质谱(Laser ablation inductively coupled plasma mass spectrometry,LA-ICP-MS)深度剖析技术,详细阐述了LA-ICP-MS深度剖析技术的基本原理、相较于其他分析技术的优势和深度分辨率的计算方法,总结了激光剥蚀参数、涂层材料厚度和剥蚀池的几何形状这3个方面对多层涂层材料深度剖析和深度分辨率的影响,介绍了LA-ICP-MS深度剖析技术在陶瓷涂层、金属镀层材料、玻璃和聚合物涂层分析中的应用实效。     

Quantitative analysis of impurities in aluminum alloys by laser-induced breakdown spectroscopy without internal calibration

To develop a fast and sensitive alloy elemental analysis method, a laser-induced breakdown spectroscopy（LIBS） system was established and used to carry out quantitative analysis of impurities in aluminum alloys in air at atmospheric pressure. A digital storage oscilloscope was used as signal recording instrument, instead of traditional gate integrator or Boxcar averager, to reduce the cost of the whole system. Linear calibration curves in the concentration range of 4 ×10^-5-10^-2 are built for Mg, Cr, Mn, Cu and Zn using absolute line intensity without internal calibrations. Limits of detection for these five elements in aluminum alloy are determined to be （2-90）× 10^-6. It is demonstrated that LIBS can provide quantitative trace elemental analysis in alloys even without internal calibration. This approach is easy to use in metallurgy industries and relative research fields.     

嵌入式可视化倒车辅助系统设计

针对目前车辆倒车事故频发的问题,设计了一套可视化的倒车辅助系统,引导驾驶员安全准确地倒车。本设计采用MK60DN512处理器作为主控芯片,结合转向角采集、倒车影像采集以及车载液晶显示等单元构成。利用BP神经网络算法整定PID速度控制参数,控制车辆快速平稳运行。根据车辆的转向角,预测出倒车路径,并显示在车载液晶显示器上,为驾驶员提供引导,降低倒车难度,减少倒车事故的发生。实验结果表明,该系统的有较高的预测准确性。     

一起220kV变压器中性点套管异常分析及防范措施

本文中作者介绍了一起220kV变压器中性点套管异常情况,阐述了该中性点套管的结构形式及特点,对该套管进行了返厂检查、试验及解体工作,分析了该异常情况的根本原因,提出了防范措施。     

Elemental analysis of copper alloy by high repetition rate LA-SIBS using compact fiber spectrometer

High repetition rate laser-ablation spark-induced breakdown spectroscopy(HRR LA-SIBS) was first used to analyze trace elements in copper alloy samples. The 1064 nm output of an acoustooptically Q-switched Nd:YAG laser operated at a pulse repetition rate of 1 kHz was utilized to ablate copper alloy and to form original plasma, spark-discharge was applied to further breakdown the ablated samples and enhance the emission of the laser-induced plasma. A compact multichannel fiber spectrometer was used to analyze the plasma emission under nongated operation mode. Under the assistance of high repetition rate spark discharge, the plasma emission was able to be improved significantly. The determined limits of the detection of lead and aluminum were 15.5 ppm and 1.9 ppm by HRR LA-SIBS, respectively, which were 11 and 6 folds better than that determined by HRR LIBS under the same laser-ablation condition. This work demonstrates the feasibility of using fiber spectrometer to analyze plasma emission under non-gated operation mode and the possibility of building a portable HRR LA-SIBS system for rapid elemental analysis of copper alloys and other solid samples.     

核四极共振在炸药探测上的应用

综述了探测炸药在国内外研究的进展,包括核四极共振的探测方法、激励信号的方式和多脉冲序列技术、SQUIDS先进探测技术的应用、虚假信号及干扰信号的消除和炸药与核四极共振信号的关系．提出了核四极共振探测炸药中存在的问题及解决该问题的建议。     

聚焦激光束焦点光斑尺寸与样品剥离阈值的同时测量

当聚焦激光束在焦平面上的光强分布为高斯分布时,理论推导了激光能量与激光在样品表面所烧蚀的坑洞半径的关系。以铝箔、铝反射镜和热敏相纸为样品,用显微镜测量出不同能量的脉冲激光在样品表面烧蚀的坑洞半径并通过数值拟合来实现对聚焦激光束的焦点光斑尺寸和样品剥离阈值的同时测量。对于脉宽为15ns、波长为532nm的激光,测得铝和热敏相纸的剥离阈值分别为2.5J/cm2和0.25J/cm2。光斑尺寸和剥离阈值两个参量的测量误差均约为±10%。该技术能够同时且简便地测量出聚焦激光束焦点的光斑尺寸和样品的剥离阈值,对研究固体与激光相互作用以及评价激光束聚焦的特性有一定的应用价值。