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    Ultrathin high-performance hollow fiber membranes
    3.
    发明授权
    Ultrathin high-performance hollow fiber membranes 失效
    超薄高性能中空纤维膜

    公开(公告)号：US6015516A

    公开(公告)日：2000-01-18

    申请号：US100094

    申请日：1998-06-19

    申请人： Tai-Shung Chung ,  Xudong Hu ,  Soo Khean Teoh

    发明人： Tai-Shung Chung ,  Xudong Hu ,  Soo Khean Teoh

    IPC分类号： D01D5/24 ,  D01D5/247 ,  D01F6/66

    CPC分类号： D01D5/247 ,  D01D5/24 ,  D01F6/66

    摘要： A process for forming ultrathin dense-layer asymmetric hollow fiber membranes with a dense layer of less than 500 .ANG. from a binary solution system comprising a polymer and a solvent. In this process, the spinning polymeric solution has a high viscosity and exhibits chain entanglement at the spinning temperature. The solubility parameter difference between the bore fluid and the spinning dope is less than 2.5 (cal/cm.sup.3).sup.0.5 and the volume ratio of bore-fluid flow rate to the dope flow rate is between 0.45 to 0.75. The dope is wet-spun into hollow fibers using water as external coagulant. The ultrathin dense-layer asymmetric hollow fiber membranes are suitable for air and other gas separations.

    摘要翻译： 一种从包含聚合物和溶剂的二元溶液体系形成具有小于500安培的致密层的超薄致密层不对称中空纤维膜的方法。 在该方法中，纺丝聚合物溶液具有高粘度并且在纺丝温度下表现出链缠结。 孔流体和纺丝原液之间的溶解度参数差异小于2.5（cal / cm3）0.5，孔流体流速与涂料流速的体积比在0.45至0.75之间。 将涂料用水作为外部凝结剂湿法纺丝成中空纤维。 超薄致密层不对称中空纤维膜适用于空气和其他气体分离。

    Rapid curing of thin composite material sections
    5.
    发明申请
    Rapid curing of thin composite material sections 审中-公开
    薄复合材料段的快速固化

    公开(公告)号：US20140361471A1

    公开(公告)日：2014-12-11

    申请号：US14295402

    申请日：2014-06-04

    申请人： Xudong Hu ,  Deepak Ravikumar ,  Devin Patten

    发明人： Xudong Hu ,  Deepak Ravikumar ,  Devin Patten

    IPC分类号： C04B35/64 ,  C04B35/22 ,  B28B3/00 ,  B28B1/08 ,  B28B3/20

    CPC分类号： B28B11/24 ,  B01J3/04 ,  C04B20/12 ,  C04B28/10 ,  C04B40/0231 ,  Y02P40/18 ,  C04B14/042 ,  C04B20/1066 ,  C04B20/107 ,  C04B14/043

    摘要： A method of preparing and rapidly curing a composite material having a thin cross section. The composite material includes a mixture of solid particles, at least some of which are a material that reacts with CO2, such as a silicate, for example Wollastonite. The green material is prepared by mixing the solid components with a liquid such as water to form a slurry, and forming green bodies by placing the slurry in forms. The green bodies are reacted with CO2 to form cured composite materials having thin sections, in the range of 10 to 15 mm. Curing in periods of 6 hours has been demonstrated.

    摘要翻译： 一种制备并快速固化具有薄截面的复合材料的方法。 复合材料包括固体颗粒的混合物，其中至少一些是与CO 2反应的材料，例如硅酸盐，例如硅灰石。 绿色材料通过将固体组分与液体如水混合以形成浆料并通过将浆料置于形式中而形成生坯来制备。 生坯与CO2反应形成具有10至15mm范围内的薄截面的固化复合材料。 已经证明了6个小时的固化。

    Non-intrusive laser-based system for detecting objects moving across a planar surface
    7.
    发明授权
    Non-intrusive laser-based system for detecting objects moving across a planar surface 失效
    用于检测物体移动穿过平面表面的非侵入式激光系统

    公开(公告)号：US06404506B1

    公开(公告)日：2002-06-11

    申请号：US09264828

    申请日：1999-03-08

    申请人： Harry H. Cheng ,  Benjamin D. Shaw ,  Joe Palen ,  Jonathan E. Larson ,  Xudong Hu ,  Kirk Van Katwyk

    发明人： Harry H. Cheng ,  Benjamin D. Shaw ,  Joe Palen ,  Jonathan E. Larson ,  Xudong Hu ,  Kirk Van Katwyk

    IPC分类号： G01B1102

    CPC分类号： G01B11/04

    摘要： In current practice, quantitative traffic data is most commonly acquired from inductive loops. In addition, video-image processing or time-of-flight laser systems can be used. These methods all have problems associated with them. Therefore, we have developed a new type of non-intrusive laser-based detection system for measurement of vehicle travel time. The system employs a fan angle laser, an image lens, a set of cylindrical optics, a linear photodetector array, and associated signal processing hardware and software. The system is positioned above the plane of detection and configured such that it can unambiguously find the object boundaries in all lighting conditions independent of the time-of-flight of the laser. Instead of depending upon the reflectance of the object being detected, or determination of the range or distance from the detector to the object being detected, the invention reflects the laser off of the pavement or other roadway surface. The lack of a reflection determines the size, shape, and “presence” of the vehicle, and the system is capable of determining the length and width of moving objects, as well as travel time, in real time with high resolution.

    摘要翻译： 在目前的实践中，定量交通数据最常见于电感回路。 此外，可以使用视频图像处理或飞行时间激光系统。 这些方法都有与之相关的问题。 因此，我们开发了一种新型的非侵入式激光检测系统，用于测量车辆行驶时间。 该系统采用扇形角激光器，图像透镜，一组圆柱形光学器件，线性光电检测器阵列以及相关的信号处理硬件和软件。 该系统位于检测平面之上并且被配置为使得它能够明确地在所有照明条件下找到与激光器的飞行时间无关的物体边界。 本发明不依赖于被检测物体的反射率，或者确定从检测器到被检测物体的距离或距离，反射了路面或其他道路表面上的激光。 缺乏反射决定了车辆的尺寸，形状和“存在”，并且系统能够以高分辨率实时地确定移动物体的长度和宽度以及行驶时间。