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A Sea of Spinning Electrons（图）
Sea Spinning Electrons
2017/10/25
Picture two schools of fish swimming in clockwise and counterclockwise circles. It’s enough to make your head spin, and now scientists at Rutgers University-New Brunswick and the University of Florida...
The brown recluse spider engineers extra-strong silk by spinning loops onto a flat strand
The brown recluse spider engineers extra-strong silk spinning loops flat strand
2017/3/14
It helps to know a little about the brown recluse to fully understand the discovery about what makes the silk of this particular spider so strong.An international collaboration between William & Mary ...
基于小波-Contourlet变换与Cycle Spinning相结合的SAR图像去噪
小波Contourlet变换 小波去噪 Contourlet变换去噪 合成孔径雷达图像去噪
2013/8/19
由于合成孔径雷达（SAR）在农业、林业、水文、地矿、海洋、测绘等领域广泛应用，SAR图像质量和视觉效果提升成为了各国学者研究的热点问题。SAR图像的主要噪声源——相干斑噪声的抑制和去除显得越来越重要。本文通过分析了SAR图像的噪声成因以及其噪声模型。基于SAR图像的特性，本文结合小波变换和Contourlet变换各自的优点，提出了一种基于小波-轮廓波变换与图像循环平移结合的SAR图像去噪算法。本文...
压下量对梯形内齿轮旋压成形质量的影响（Effect of Reduction on Quality of Trapezoidal Inner Gear Formed by Spinning）
梯形内齿轮 旋压 压下量 成形质量
2010/12/28
旋压成形技术是杯形薄壁内齿轮加工的新方法，其中压下量对内齿轮成形质量的影响最大。采用有限元数值模拟和试验相结合的方式，以相对齿高和齿顶不均匀度为质量评价参数，研究了压下量对梯形内齿轮旋压成形质量的影响。结果表明，对于一定齿高轮齿的成形，对应一定壁厚的毛坯，存在着一个最佳压下量，采用该压下量成形，轮齿充填质量最好；小于该值时，充填材料不够；大于该值时，材料整体变形量过大将导致成形缺陷。
基于Cycle Spinning Contourlet变换和总变分最小化的遥感图像去噪算法
遥感图像 Contourlet变换 Cycle Spinning 总变分最小化 图像去噪 融合
2011/4/18
针对很多已有的遥感图像去噪算法去噪的同时存在不能有效的保留细节和增强边缘的问题，提出了一种基于Cycle Spinning Contourlet变换和总变分最小化的图像去噪新算法。该算法依据CycleSpinningContourlet变换能够很好的保留原始图像的细节和纹理信息，而总变分最小化方法具有在去噪的同时增强图像边缘的特性，因此使用所提出的融合规则对两种算法去噪后的图像进行融合能够取得更好...
Lab-Scale Fiber Spinning Experimental Design Cost Comparison
Lab-Scale Fiber Spinning Experimental Design Cost Comparison
2010/9/20
Many statistical experimental designs are too costly or require too much raw material to be feasible for lab-scale fiber spinning experiments. In this study a four-factor response surface design is pr...
东华大学纤维科学与技术课件 Fiber spinning
东华大学 纤维科学与技术 课件 Fiber spinning
2009/12/30
东华大学纤维科学与技术课件Fiber spinning 。
基于连续多点成形原理的旋压成形技术（Spinning Technology Based on Principle of Continuous Multipoint Forming）
塑性成形 板材 旋压成形 连续成形
2009/12/28
介绍了传统的旋压工艺，提出了基于连续多点成形原理的旋压成形工艺，对工作旋轮的布置和驱动方式进行了探讨，研制出高效旋压成形装置，在所研制的旋压成形装置上成形了大量的实验件，实现了圆形板料件的高效旋压成形，为建立新型高效旋压成形的基本理论，解决柔性旋轮结构设计与控制点设置、自动控制系统的控制模式及探索技术参数作必要的准备工作。
The Glass-Coated Melt Spinning of Gold Filaments.
Simulation of Multifilament Semicrystalline Polymer Fiber Melt-Spinning
Computer modeling Semi-crystalline polymer Multifilament Melt-spinning
2009/7/21
The goal of this effort is to provide an accurate simulation of multifilament fiber melt spinning, applicable for a wide range of material and process conditions. For ease of use, the model should run...
综合利用DCT变换和Cycle Spinning，提出一种新的图像压缩方法。由于图像的DCT压缩是分块完成的，且DCT变换缺乏平移不变性，直接应用DCT变换对图像进行压缩会使压缩重构图像产生块效应和伪吉布斯现象，导致图像失真。引入Cycle Spinning算法能有效地消除图像DCT压缩过程中产生的失真。实验结果表明，与一般图像DCT压缩方法相比，该方法明显改善图像视觉效果，显著提高图像的PSNR...
Mathematical Modelling of the Pneumatic Melt Spinning of Isotactic Polypropylene. Part III. Computations of the Process Dynamics
melt blowing air-drawing nonwovens polypropylene modelling
2009/6/17
Computer simulation of the pneumatic melt spinning of isotactic polypropylene based on the mathematical model of the process is presented. Two dynamic zones of the air jet-filament interactions along ...
Mathematical Modelling of the Pneumatic Melt Spinning of Isotactic Polypropylene. Part II. Dynamic Model of Melt Blowing
melt blowing of nonwovens modelling of melt air-drawing dynamic functions in melt air-drawing
2009/6/15
Mathematical Modelling of the Pneumatic Melt Spinning of Isotactic Polypropylene. Part II. Dynamic Model of Melt Blowing.
Numerical Study on the Principle of Yarn Formation in Murata Air-Jet Spinning
Swirling airflow Fibers Nozzle Yarn MJS
2009/4/21
A realizable k-ε turbulence model was adopted to study the airflow characteristics inside the two nozzles including the slotting-tube of Murata air-jet spinning (MJS). Actions of the two nozzles and ...
Application of Stochastic Simulation to Analysis of Elongation Flow and Fiber Spinning
Stochastic simulation Elongation flow Fiber spinning Doi-Edwards model
2009/4/21
Application of stochastic simulation to a uniaxial elongation flow and fiber spinning of polymer melts were investigated. In the numerical simulation of fiber spinning, a one dimensional approximatio...