摘要：Non-uniform rational B-spline(NURBS)curves are combined with the Kriging model to present a prediction method of the rail grinding profile for a grinding *** a worn rail profile is a free-form curve,the parameterized model of a rail profile is constructed by using the cubic NURBS *** the removed area of the rail profile cross-section by grinding as the calculation index of the grinding amount,the grinding amount calculation model of a grinding wheel is established based on the area integral formula of the cubic NURBS *** predict the grinding amount of a grinding wheel in different modes,a Kriging model of the grinding amount is constructed,taking the travel speed of a grinding train,the grinding angle and grinding pressure of a grinding wheel as the variables,and considering the grinding amount of a grinding wheel as the *** this basis,the prediction method of the rail grinding profile is presented based on the order-forming *** effectiveness of this method is verified based on a practical application.

摘要：[目的/意义]相较于中国目录学史的研究,学界对于中国目录学史研究史的梳理略显不够,通过梳理20世纪中国目录学史研究史,为新时代中国目录学史的研究与书写提供历史借鉴。[研究设计/方法]以20世纪以来出版的姚名达著《中国目录学史》、王重民著《中国目录学史论丛》、吕绍虞著《中国目录学史稿》、倪士毅著《中国古代目录学史》、乔好勤著《中国目录学史》、余庆蓉著《中国目录学思想史》以及柯平著《中国目录学史》7本通论性目录学史著作为研究对象,通过系统研读、分析与比较,借以梳理20世纪中国目录学史的书写路径。[结论/发现]20世纪以来中国目录学史书写呈现出如下特点:(1)历史学、图书馆学学者是中国目录学史书写的两大核心主体;(2)线性进化史观逐渐成为中国目录学史书写的主流史观;(3)书写的焦点由“以目录为中心”到“目录与人并重”。[创新/价值]在此基础上提出了未来中国目录学史书写展望:(1)明确“目录学史”的内涵;(2)明确“以西释中”还是“以中释中”;(3)明确中国目录学史的中心是“人”;(4)探索多体裁的中国目录学史书写形式;(5)拓展中国目录学史的关注视域。

摘要：阐述数字化技术在媒体后期剪辑中的非线性剪辑、特效处理、图像修饰应用。从提高剪辑效率、增加创意表现、改善图像质量方面,探讨数字化技术对媒体后期剪辑过程的改变。

摘要：针对重大工程设计施工总承包模式(DB模式)下,设计施工方社会责任缺失或履责不到位而导致工程效率低、负面影响大等问题,结合重大工程社会责任的特点,引入行为经济学中的公平偏好理论,建立双边道德风险下以工程总收益为目标的激励模型,进而解出最优社会责任努力水平和最优激励系数等均衡值,并与不考虑双边道德风险的履责收益分享模型进行比较分析,得出以下结论:适度的公平偏好会增强施工方和设计方的竞争意识,一定程度上可以提高双方的社会责任努力水平;契约设计需兼顾公平和效率,分配比例需根据双方的社会责任投入产出效率和公平关切程度动态调整,才能协调总收益最优;考虑双边道德风险的契约设计可实现工程总收益的帕累托改进。所得结论为促进重大工程实施主体提高社会责任履责能力和水平提供了理论方法和决策依据。

摘要：Electrocardiogram(ECG)monitoring is used to diagnose cardiovascular diseases,for which wearable electronics have attracted much attention due to their lightweight,comfort,and long-term *** study developed a wearablemultilead ECG sensing system with on-skin stretchable and conductive silver(Ag)-coated fiber/silicone(AgCF-S)dry *** and normal adhesion to pigskin(0.43 and 0.20 N/cm2,respectively)was optimized by the active control of fiber density and mixing ratio,resulting in close contact in the electrode–skin *** breathableAgCF-S dry electrodewas nonallergenic after continuous fit for 24 h and can be reused/cleaned(>100 times)without loss of *** AgCF encapsulated inside silicone elastomers was overlapped to construct a dynamic network under repeated stretching(10%strain)and bending(90°)deformations,enabling small intrinsic impedance(0.3,0.1 Hz)and contact impedance variation(0.7 k)in high-frequency vibration(70 Hz).All hard/soft modules of the multilead ECG system were integrated into lightweight clothing and equipped with wireless transmission for signal *** synchronous acquisition of I–III,aVR,aVL,aVF,and V4 lead data,the multilead ECG sensing system was suitable for various scenarios,such as exercise,rest,and sleep,with extremely high signal-to-noise ratios.

摘要：Phase change materials (PCMs) can be incorporated with low-cost minerals to synthesize composites for thermal energy storage in building *** coal (SC) after vanadium extraction treatment shows potential for secondary utilization in composite *** prepared SC-based composite PCMs with SC as a matrix,stearic acid (SA) as a PCM,and expanded graphite (EG) as an *** combined roasting and acid leaching treatment of raw SC was conducted to understand the effect of vanadium extraction on promoting loading *** showed that the combined treatment of roasting at 900℃ and leaching increased the SC loading of the composite by 6.2%by improving the specific surface *** loading capacity and thermal conductivity of the composite obviously increased by 127%and 48.19%,respectively,due to the contribution of 3wt% *** data were supported by the high load of 66.69%and thermal conductivity of 0.59 W·m^(-1)·K-1of the designed *** obtained composite exhibited a phase change temperature of 52.17℃,melting latent heat of 121.5 J·g^(-1),and good chemical *** SC-based composite has prospects in building applications exploiting the secondary utilization of minerals.

摘要：随着人工智能、大数据等信息技术的高速发展,水利防汛智能化已成为必然趋势,为进一步提高水旱灾害防御协同指挥决策水平,减少水旱灾害带来的损失,需构建以人工智能为核心的水利防汛机器人。该文围绕广东省水利防汛调度管理业务需求,以人工智能、大数据分析等技术为手段,整合共享已有监测信息,开发语音问答、综合查询、预警警示、智慧分析等功能,为广东省水利防汛智能化运行管理提供支撑服务。

摘要：水冰是支撑国际月球科研站建设和运行所需的重要资源。红外遥感是探测月球水冰的重要手段,但却难以直接用于无阳光直射的永久阴影区。提出了一种基于光照散射强度模型的阴影区光谱信息校正方法,并构建了基于光谱吸收特征的水冰探测方法,实现了对于永久阴影区水冰信号的探测。应用该方法对月球南极沙克尔顿(Shackleton)和诺比利(Nobili)撞击坑进行分析,发现它们内部的永久阴影区存在水冰信号。该研究有望为国际月球研究站的选址和建设提供借鉴。

摘要：重庆磁器口古镇历史文化街区和歌乐山红岩文化景区两处景区之间自然山水同源同脉、文化内核本质共通,但多种原因造成两处景区尚未实现协同发展,文化形象相互割裂。该文以地理文化为研究视角,构建了山水城市景区地理文化空间特征分析的技术框架,研究歌磁景区地理文化的空间特征以及在开发利用中出现的问题,挖掘景区整体地理格局和文化脉络。采用贯通景观山水脉络、串联交通体系、加密要素网络、设计特色绿化景观等空间组织方法,研究彰显自然地理特色、强化文化联系的空间优化策略,为歌磁景区自然与人文和谐共生发展提供新的思考。

摘要：高能级强夯(指主夯击能大于6000kN·m的强夯)的有效加固深度可达8~30m,可加固处理大厚度非饱和土、大面积重堆载场地、大厚度湿陷性黄土和新填土等地基土,可进一步提高地基土强度和均匀性,降低压缩性,消除湿陷性,改善其抵抗振(震)动液化的能力等,使强夯法的经济高效性得以更加充分地施展[1-3]。本文结合某工业厂房项目超过15m的填土地基采用18000kN·m能级强夯处理后,利用压实度试验、平板载荷试验和多道瞬态面波测试试验三种试验结果评价地基强夯加固处理后的效果,为18000kN·m能级下地基处理的施工提供优化设计参数,为此类地基强夯加固后工程质量评定标准的合理性与应用提供参考。