普鲁士蓝加速人体内铯排出效果的观察

本文介绍6例在苏联切尔诺贝利核电站事故期间受到放射性铯内污染的我国驻外人员,在本实验室接受活体测量和服用普鲁士蓝促排的观察结果。6例内污染者分两组分别于受污染后的第114天和第272天开始用药,在大约一个月期间,每人共服药54g(给药方式:每次服1g,每日3次,6天为一个疗程,间隔6天,共用药3个疗程)。观测结果表明,在促排期间,6例内污染者体内铯的生物半排期均明显缩短,~(131)Cs 的生物半排期由对照期(用药前)的54—123d 缩短到28—65d,~(134)Cs 由对照期的42—117d 缩短到23—69d;6例体内放射性铯的累积活度相对于同期未用药条件下的累积活度减少2—21%。     

安钢小方坯连铸高效化改造

介绍了安阳钢铁集团有限公司（以下简称安钢）二炼小方坯基本情况,高效化改造的原因,所采取的主要技术措施,以及实施高效改造后取得的效果。     

Artistic features extraction from chinese calligraphy works via regional guided filter with reference image

Chinese calligraphy is a unique visual art, and and is one of the material basis of China’s traditional cultural heritage. However, time had caused the old calligraphy works to weathering and damages, so it is necessary to utilize advanced technologies to protect those works. One of those technologies is digital imaging, and the obtained images by digital imaging can preserve the visual information of calligraphy works better, furthermore, they can be used in further researches. While the basic works for those researches are to extract the artistic features which include two elements, i.e., form and spirit. However, most of the existing methods only extract the form and ignore the characters’ spirit, especially they are insensitive to the slight variation in complex ink strokes. To solve these problems, this paper proposes an extraction method based on regional guided flter (RGF) with reference images, which is generated by KNN matting and used as the input image for RGF. Since RGF is sensitive to the slight variation of ink, so the detailed information of the inside of strokes can be detected better. Besides, unlike the past works, which filter the whole strokes, RGF filters the inside of strokes and edges in different windows respectively, which results in that the edges are preserved accurately. Results from a deployment of several famous Chinese calligraphy works demonstrate that our method can extract more accurate and complete form and spirit with lower error rate.     

Constructing Facial Identity Surfaces for Recognition

We present a novel approach to face recognition by constructing facial identity structures across views and over time, referred to as identity surfaces, in a Kernel Discriminant Analysis (KDA) feature space. This approach is aimed at addressing three challenging problems in face recognition: modelling faces across multiple views, extracting non-linear discriminatory features, and recognising faces over time. First, a multi-view face model is designed which can be automatically fitted to face images and sequences to extract the normalised facial texture patterns. This model is capable of dealing with faces with large pose variation. Second, KDA is developed to compute the most significant non-linear basis vectors with the intention of maximising the between-class variance and minimising the within-class variance. We applied KDA to the problem of multi-view face recognition, and a significant improvement has been achieved in reliability and accuracy. Third, identity surfaces are constructed in a pose-parameterised discriminatory feature space. Dynamic face recognition is then performed by matching the object trajectory computed from a video input and model trajectories constructed on the identity surfaces. These two types of trajectories encode the spatio-temporal dynamics of moving faces.     

仿生眼的研究现状与发展趋势

首先,在分析人眼眼球运动的特点和形式的基础上,详细介绍了国内外仿生眼研究对扫视性眼球运动、平滑性眼球运动、异向眼球运动、前庭动眼反射、视动反射等的模仿,最后总结了仿生眼研究的特点和发展趋势．     

树脂浸渍补充增密对C/C复合材料摩擦磨损性能的影响

将CVD预增密至不同初始密度的C／C复合材料进行树脂浸渍／炭化补充增密至1.85g/cm^3，热处理后进行热物理性能的检测和不同刹车压力的摩擦磨损试验。结果表明，树脂浸渍／炭化是一种行之有效的快速致密化手段，所得制品的可石墨化性较好，导热性能也满足国外同类产品的要求；摩擦磨损试验和扫描电镜（SEM）观察结果表明，低一压力下形成的磨屑粒度明显大于高压下的磨屑，因而低压下的摩擦数高于高刹车压力下的摩擦系数。低压下的树脂炭对摩擦磨损的影响相对较大。     

综合考虑经济-环境-社会因素的多能耦合系统高维多目标规划

提高能源系统运行经济性、减少污染排放、改善能源利用效率是我国未来能源系统发展的重要目标.但是,在实际能源系统规划中,由于上述不同目标之间具有复杂的关联性,因此当问题的目标函数数量多于3个且存在不确定性参数时,现有方法往往难以实现对该类问题的有效求解.为应对上述挑战,该文提出一种面向多能耦合系统规划的高维多目标优化分析框...     

两相流中相积存造成多元混合制冷剂浓度变化分析

因多相流动中汽液速度差而造成相积存（Holdup）是深冷混合工质节流制冷系统中混合物浓度偏析的一个重要因素。建立了因相积存造成浓度变化的计算模型,采用Palmer对Beggs-Brill—Moody关联式的修正式,详细考察了管道倾角及流体温度对深冷多元混合物因汽液相积存异造成的浓度偏析影响。计算结果表明,管道倾角对积存具有显著影响,其中倾斜向上会显著增加积存,造成混合物浓度显著变化。浓度变化发生在两相区,并随温度变化导致不同组分的浓度变化趋势不同。     

Improving the precision of optical metrology by detecting fewer photons with biased weak measurement

In optical metrological protocols to measure physical quantities, it is, in principle, always beneficial to increase photon number n to improve measurement prec...     

岩体平巷充气降氡技术研究

提出了一种适用于破碎山体中平巷的降氡技术.该巷道中氡浓度受山体内空气渗流方向和强度的控制,渗流的机制是烟囱效应.由于山体内空气的温度基本恒定,因而密度不变,而巷道外空气密度随温度的变化而相应地变化着,这就导致了山体内外空气的失衡--夏季山体内含氡空气经裂缝流入巷道,冬季巷道外新鲜空气流入巷道后再经山体裂缝流向大气.实验表明,通过在巷道口部设置自动风门,向巷道内机械压风,形成充气状态,可以调节山体内空气的渗流方向,从而可以显著降低巷道内氡的浓度.