摘要：Passive filtering of neural networks with time-invariant delay and quantized output is considered.A criterion on the passivity of a filtering error system is proposed by means of the Lyapunov-Krasovskii functional and the Bessel-Legendre *** on the criterion,a design approach for desired passive filters is developed in terms of the feasible solution of a set of linear matrix ***,analyses and syntheses are extended to the time-variant delay situation using the reciprocally convex combination ***,a numerical example with simulations is used to illustrate the applicability and reduced conservatism of the present passive filter design approaches.

摘要：结合广连高速公路高边坡防护工程,从测量放线、地基开挖、钢筋制作、模板安装、混凝土浇筑等几个方面,对基坑高边坡锚杆框架梁的防护设计、施工前的准备工作、施工中应注意的问题和施工注意事项进行研究。结果显示:挖方高边坡的防护设计满足边坡的安全、稳定性能,保障了项目的整体质量,在社会效益、经济效益上取得了一定的成就。

摘要：由于全球的工农业的迅速发展,水污染已成为人类所面临的最大危机。基于半导体光催化法是治理水污染的绿色技术之一,能够有效地降解和去除水中的污染物。在众多光催化材料中,金属氧化物半导体由于其具有低毒性、高稳定性和对水溶液中化学腐蚀的较高的抵抗力等优点,而被科学家们广泛地研究和应用。其中,三元组分的金属氧化物因其具有较窄的禁带宽度和可见光响应性质,在光催化降解领域上的能力已经超过其他的金属化合物。本文系统地介绍了两种典型的三元金属氧化物——钨酸铋和钼酸铋,围绕着基于钨酸铋和钼酸铋的复合型催化剂的制备和在光催化降解废水处理领域中的应用以及发展进行了综述,提出了目前关于钨酸铋和钼酸铋的复合材料的设计、机理研究和改性修饰方法中的所存在的主要问题,并对未来的发展趋势进行了展望。

摘要：The current work is oriented toward the development of a novel biologically inspired bat aerial robot with morphing wings. Based on the flight characteristics data of natural bats(Eptesicus fuscus), a novel four degrees of freedom robotic bat wing was developed to emulate the movements of bat wing. The design, fabrication, programing and wind tunnel experiments of the robot bat wing are described in this paper. Based on this robotic wing, the influence of flap amplitude, wind speed, flight frequency, downstroke ratio and stroke plane angle as well as the contributions of flap, elbow, sweep and wrist motions on the aerodynamic force and mechanical power were studied and analyzed. Results of wind tunnel experiments validated that higher lift would bring greater power consumption, and the flap motion would generate the most force and need more energy expenditure compared with other motions of bat. The experimental results suggest that the flap and fold motions are indispensable to make a robotic bat wing that has a better flight performance. This study provides some implications and a better understanding for the future robotic bat.

摘要：In recent years,conjugated polymers have attracted great attention in the application as photovoltaic donor materials in polymer solar cells(PSCs).Broad absorption,lower-energy bandgap,higher hole mobility,relatively lower HOMO energy levels,and higher solubility are important for the conjugated polymer donor materials to achieve high photovoltaic ***-chain engineering plays a very important role in optimizing the physicochemical properties of the conjugated *** this article,we review recent progress on the side-chain engineering of conjugated polymer donor materials,including the optimization of flexible side-chains for balancing solubility and intermolecular packing(aggregation),electron-withdrawing substituents for lowering HOMO energy levels,and two-dimension(2D)-conjugated polymers with conjugated side-chains for broadening absorption and enhancing hole *** the molecular structural optimization by side-chain engineering,the2D-conjugated polymers based on benzodithiophene units demonstrated the best photovoltaic performance,with powerconversion efficiency higher than 9%.

摘要：虚拟现实技术被越来越多地应用到康复训练中,但其实际的康复训练效果仍然不够理想;为此,研究结合脑电信号和虚拟现实技术设计了康复训练系统;首先,利用非入侵式电机采集运动想象脑电信号,并进行预处理;其次,利用粒子群优化算法改进支持向量机,进而对采集到的运动想象脑电信号进行分析;然后,以识别分类后的运动想象脑电信号为输入,设计一种基于虚拟现实技术的康复训练系统;最后,提出一种基于改进长短期记忆网络的康复训练效果评估模型,以验证系统的应用效果;实验结果表明,在对两名受试者的运动想象训练实验中,所提改进支持向量机分类器对于受试者的分类准确率最高,为95.54%;所提康复训练效果评估模型对于15名患者的评估准确率均在93%以上,最高可达到96.02%,对上肢功能障碍的评估精确率为95.87%;实验结果证实了所提系统和效果评估模型的性能,有利于提高康复训练过程的智能化水平,改善患者的康复训练效果。

摘要：针对传统干燥后稻谷裂纹率较高、稻谷品质无法得到保证的问题,探究缓苏温度、缓苏比、稻谷初始含水率等工艺参数对稻谷裂纹增率、干燥速率影响及缓苏工艺抑制稻谷干燥性裂纹的机理。采用三元二次正交旋转组合设计优化稻谷缓苏干燥工艺参数,以缓苏温度、缓苏比、稻谷初始含水率为试验因素,使用Box-Behnken试验,建立回归模型并分析各因素与试验指标之间的关系。使用Design-Expert 12软件对试验结果进行参数优化及数据分析,得出最优工艺参数:缓苏温度为57℃,初始含水率为23%,缓苏比为2.4∶1。在此组合参数下稻谷裂纹增率为9.53%,干燥速率为0.104%/min,且相对误差较小。研究表明,经优化后组合参数对降低稻谷裂纹增率、提高干燥速率有着积极的作用,可为实际生产提供理论基础。

摘要：Cell-derived microvesicles(MVs) are secreted from almost all kinds of mammalian cells into the extracellular space, and play crucial roles in intercellular communication and transporting biomolecules between cells. However, there is a great challenge for visualizing and monitoring of MVs’ bio-behaviors due to the limitations of existing labeling methods. Herein, we report the first paradigm of designer cell-self-implemented labeling of MVs secreted from living mammalian MCF-7 cells in situ using the intracellular-synthesized fluorescent quantum dots(QDs) during the formation of MVs. By elaborately coupling intracellular biochemical reactions and metabolism pathways, the MCF-7 cells can be illuminated brightly by intracellular-biosynthesized fluorescent CdSe QDs. Simultaneously, intracellular-synthesized QDs can be in situ encapsulated by the secreted MVs budding from the plasma membrane of the fluorescing cells to label the MVs with an efficiency of up to 89.9%. The whole labeling process skillfully combines designer precise cell-tuned intricate synthesis of CdSe QDs with mild in-situ labeling via cell-selfimplementation just after feeding the cell with suitable chemicals, which is structure-or function-nondestructive and much more straightforward and milder than those by chemical conjugation or indirect encapsulation with conventional fluorogenic labels.

摘要：电视剧的艺术创意很重要,主要表现在人物、叙事、传播等方面。人物创意要合情合理,要符合人物性格,要突出人物精神。不断变化、引人入胜的故事情节需要不断创新,在入戏、"戏眼"、叙事的核心价值等方面应该精心安排、着意追求。用普世策略进行全球营销,有利于电视剧艺术在全球的传播。

摘要：本文以都安高速项目为例,以项目岩浪大桥为背景,采用“钢管立柱+贝雷梁”支架现浇方法,解决了大悬臂门式预应力盖梁跨度大、截面高、体积大等问题,同时采用有限元分析软件对支架结构强度、刚度进行了模拟分析,并采取了支架等效配重预压方法。结果表明支架体系安全可靠、经济可行,可为类似工程提供支架选型参考。