SAR与可见光图象匹配方法的研究

由于SAR和可见光成象传感器图象的物理特征不同,因此进行匹配难度很大。本文在深入分析了这两种传感器图象物理特征的基础上,提出了一种图象匹配的新方法。该方法运用形态学滤波方法去除SAR图象斑点噪声,利用图象的边缘特征进行匹配,并采用多分辨率分级搜索技术减少计算量,在对实验结果进行分析的基础上提出了搜索真实匹配位置的原则,大大提高了匹配的准确率。通过实验对SAR图象斑点噪声滤波和SAR与可见光图象匹配算法进行了验证,实验证明本算法的SAR图象去噪效果明显优于传统的Frost方法,图象匹配精度高,稳定性好。     

沥青混合料级配离析定量评价与相关性研究

根据21种常规级配,制备Superpave旋转压实试件用以评价沥青混合料的级配离析.利用数字图像处理技术,获得试件截面图像,并根据FeretDiameter提取图像中各档粗集料的颗粒信息.改进了结构各向异性的体视学评价方法,提出使用粗集料结构系数Jf作为评价沥青混合料试件级配离析的指标参数.对各级配的Jf值和各档粗集料分计筛余百分率关系进行了线性回归,其复相关系数R达到0.962 1.对于颗粒最大标称粒径相同的级配,使用灰色关联分析,得出结论：除颗粒最大标称粒径为9.5 mm级配外,Jf受级配中第3大筛孔分计筛余百分率影响最大.     

采煤工作面采煤机和输送机分级协调控制系统的研究

采煤工作面的采煤机和输送机的传统调节方式是分立控制的,本文从系统工程学观点出发,结合计算机控制技术和液压控制技术,提出了对采煤机和输送机进行分级协调控制的多目标优化决策新策略,并完成了相应的实验研究。理论分析和实验研究结果表明,采煤机和输送机采用分级协调控制算法进行综合协调和控制是可行的,多目标优化决策策略具有良好的鲁棒性和满意的控制品质。     

STATCOM using the new concept of an inverter system with controlled gradational voltage

This paper presents the STATCOM using the new concept of an inverter system which consists of three inverter units connected in series, and each inverter unit generates a different input voltage such as V_C, 2V_C, 4V_C. This inverter system can output a high‐quality voltage by a low‐frequency switching operation. Thus, it can combine low loss and high quality. In this paper, we show the technique to apply STATCOM which uses the inverter system, and examination results. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 168(4): 58–65, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ).DOI 10.1002/eej.20823     

大跨度厚煤顶切眼破坏特征及控制对策研究

本文以大黄山煤矿+735综放面切眼为研究对象,分析了该类切眼围岩控制特点,探讨了大跨度厚煤顶切眼围岩破裂机制,在此基础上对其围岩裂隙发育度进行分类;同时,对大跨度厚煤顶锚杆锚固区域内的煤体建立了"承载梁"力学模型,应用弹性力学、结构力学及材料力学理论推演"承载梁"不发生拉伸破坏的极限条件。提出了"承载区分级"区域控制对策,并详细分析了其具体措施和作用效果。井下对+735综放面切眼支护试验结果表明,锚网(索)"承载区分级"强力支护系统对大跨度厚煤顶切眼的控制有良好的效果,提高了该类切眼服务期间的稳定性,能为类似条件切眼支护技术提供借鉴。     

梯度聚晶金刚石(PCD)增强楔形复合齿的制备

评述了梯度聚晶金刚石（PCD）增强楔形复合齿的优点,详细介绍了其制备工艺过程并给出了成分梯度变化的电子探针图谱。     

南襄盆地区域大剖面采集观测系统的设计与应用

南襄盆地区域大剖面工程部署的测线穿越盆地的不同构造单元,地层埋藏深浅不一,变化幅度大,不同单元的地质情况对采集使用的方法要求不一。在充分分析论证和实地试验的基础上,提出一种渐变观测系统的方法,根据工区地质构造变化趋势和目的层埋深变化情况逐段设计观测系统,在实际应用中取得了明显效果。     

A pulsed power supply with sag compensation using controlled gradational voltage

A pulsed power supply with sag compensation using controlled gradational voltage to increase the flatness of output waveforms has been developed. The sag compensation circuit consists of compensation units connected in series. Each compensation unit consists of capacitances, diodes, and semiconductor switches. The capacitances of each unit are charged with different voltages by 2ⁿ(V₀,2V₀,4V₀,…). The compensation voltage, which has 2ⁿ?1 steps, is generated by switching the semiconductor switches of each unit in a binary sequence. Using this method, compensation voltage waveforms up to 6.2 kV with 31 steps can be obtained with five compensation units. The sag compensation circuit has been adapted to a direct switch‐type pulsed power supply, which generates 7 kV pulsed voltage with a pulse width of 700µs, thus realizing sag compensation. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 150(4): 54–63, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20017     

Effective operation method by interdependent use of condenser energy of the voltage transient sag compensator with controlled gradational voltage

This paper presents the efficient operation method of the interdependent use of condenser energy on the new concept of voltage transient sag compensator. This compensator consists of the series connection inverter units, and each inverter unit generates a different output voltage by 2ⁿ times. The method proposed here, in any case of various levels of transient voltage sags on the power line, provides the efficient use of condenser energy of all these inverter units. The method of interdependent use of condenser energy is also verified by the experiment. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 154(3): 56–64, 2006; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20290     

金刚石薄膜的分层生长

采用热丝化学气相沉积生长出优异的金刚石薄膜。研究了薄膜的分层生长过程，薄膜的层状结构及膜厚随沉积时间的变化特性。