三维折射率场干涉图像的处理方法

基于最小误差阈值理论，采用实平面上的低通滤波技术，对三维折射率场干涉图上的噪音进行了处理，提出了一种与普通细化算法不同的并行细化算法，并对剔除分枝的具体方法作了介绍，通过实例说明了条纹剔除的过程。     

一种新的声韵分割的时域方法

针对以前时域特征参数帧平均能量Ｅｎ和帧平均跨零率Ｚｎ在汉语语音声韵分割中的不足，提出了一种新的时域特征参数——保号率ＲＫＳ（Ｋｅｅｐｉｎｇ－ｓｉｇｎ－ｒａｔｉｏ）。实验表明，引入ＲＫＳ参数的汉语语音自动分段系统，不仅从根本上解决了Ｅｎ和Ｚｎ的不足，而且大大提高了自动分段的准确率，降低了对输入语音的依赖性。     

三相并联有源滤波器输出滤波器设计方法研究

对三相并联有源滤波器的输出LRC低通滤波器进行了研究。根据瞬态电流跟踪指标要求,推导出并联APF输出电感的估算公式。在此基础上,详细介绍了LRC低通滤波器参数的设计方法。通过对整流负载补偿特性的仿真和实验分析,验证了该设计方法的可行性。采用该方法设计的输出滤波器,其补偿特性良好,补偿后的总谐波畸变率低,高频分量能够有效地被滤除。     

LD抽运高重复频率四通放大MOPA系统中的光纤相位共轭研究

报道了利用多模光纤作为相位共轭镜应用于重复频率100Hz。脉宽20ns的电光调Q四通放大LD抽运激光器的实验研究。由于光纤受激布里渊散射(SBS)存在的阈值效应，可以抑止使用平面全反镜的四通放大系统中难以克服的放大级自振荡(SO)和放大自发辐射(ASE)效应．以获得高能量高光束质量的激光输出。实验中在20ns．100Hz和注入光纤能量4．6mJ的情况下获得了4．1mJ的1064nm的基模激光输出。激光光束模式接近TEMoo模．且脉宽被压缩至4．7ns。在使用了光纤相位共轭镜的四通放大技术后，很好地补偿了由板条放大器热效应造成的光斑畸变。输出光斑很好地复原了振荡级输出光斑的光强空间分布。     

Z字钢蝶式孔型尺寸对变形影响的有限元分析

采用大变形弹塑性有限元法分析了孔型尺寸对310Z字钢变形的影响.计算结果表明,改变孔型尺寸,对310Z字钢的腿部变形有较大的影响,据此可以对现场的孔型设计进行指导.     

计算机辅助孔型设计系统的发展

介绍了目前国内外计算机辅助孔型设计的现状及发展和该技术在轧钢领域的应用前景.认为采用计算机辅助孔型设计可以缩短新产品的开发周期、提高孔型设计的可靠性、降低轧制时的各种消耗、加快新产品的上市速度.     

φ279.4 mm大口径气瓶管生产工艺开发

对天津钢管公司轧管厂的生产工艺做了简单介绍，分析了开发φ279．4mm大口径钢管的工艺难点，确定了各工序变形量的分配，设计了脱管机、定径机的TLW参数。     

∠90角钢腿短原因分析及改进措施

介绍了∠ 90角钢腿短原因以及粗轧孔型设计方面存在的问题 ,通过对粗轧孔型系统的改进 ,解决了∠ 90角钢生产过程中腿短问题 ,改进效果明显     

Measurement of vertical and horizontal vibrations of a probe for acoustic evaluation of food texture

Two‐dimensional (vertical and horizontal) vibrations of a wedge‐type probe upon food rupture were evaluated separately using two accelerometers placed perpendicular to a guide rod of a swing‐arm device for texture evaluation of the flesh of three varieties of apples and three types of potato chips. Voltage signals from the accelerometers were filtered using a half‐octave band‐pass filter. The energy texture index (ETI), based on kinetic energy of the vertical or horizontal probe vibrations, was calculated over low to high frequency bands (no. 1–21). The spectra for the flesh of the three varieties of apples included two common peaks for vertical ETI at band no. 11 (1,120–1,600 Hz) and 19 (17,920–25,600 Hz) and horizontal ETI at band no. 1 (0–10 Hz) and 15 (4,480–6,400 Hz). The spectra for the three types of potato chips had a common ETI peak at band no. 11 (1,120–1,600 Hz) for horizontal ETI and at no. 15 (4,480–6,400 Hz) for vertical ETI. The three apple varieties gave rise to different intensities of vertical and horizontal ETIs while the two peaks were maintained. The thick potato chip type had higher vertical and horizontal ETIs than the thin and soft varieties in most bands; however, the thin type had the highest vertical ETIs only in lower bands (0–200 Hz). The soft type had the lowest vertical and horizontal ETI. The above results suggest that different food textures can be distinguished by two‐dimensional vibration analyses of probe insertion into a food sample based on frequency bands.     

Simultaneous 2D and 3D perception for stereoscopic displays based on polarized or active shutter glasses

Viewing stereoscopic 3D content is typically enabled either by using polarizing or active shutter glasses. In certain cases, some viewers may not wear viewing glasses and hence, it would be desirable to tune the stereoscopic 3D content so that it could be simultaneously watched with and without viewing glasses. In this paper we propose a video post-processing technique which enables good quality 3D and 2D perception of the same content. This is done through manipulation of one view by making it more similar to the other view to reduce the ghosting artifact perceived without viewing glasses while 3D perception is maintained. The proposed technique includes three steps: disparity selection, contrast adjustment, and low-pass filtering. The proposed approach was evaluated through an extensive series of subjective tests, which also revealed good adjustment parameters to suit viewing with and without viewing glasses with an acceptable 3D and 2D quality, respectively.