摘要：Supersaturated designs are useful in screening experiments. This paper discusses the topic of multi-level supersaturated design. Two quantities, E(d2) and Df, are proposed to evaluate the optimality of supersaturated designs. A lower bound of E(d2) is obtained with a necessary condition for achieving it. Some E(d2)-optimal supersaturated designs of 3, 4, and 5 levels are given.

摘要：This paper shows that one-dimensional(1-D) [and three-dimensional(3-D) computational fluid dynamics(CFD)] simulations can replace the state-of-the-art usage of pseudo-homogeneous dispersion or back mixing *** is based on standardized lab-scale cell experiments for the determination of droplet rise,breakage,coalescence and mass transfer parameters in addition to a limited number of additional mini-plant experiments with original ***,the hydrodynamic parameters can also be derived using more sophisticated 3-D CFD *** 1-D modeling served as a basis to replace pilot-plant experiments in any column *** combination of 3-D CFD simulations with droplet population balance models(DPBM)increased the accuracy of the hydrodynamic simulations and gave information about the local droplet *** high computational costs can be reduced by open source CFD codes when using a flexible mesh *** combined simulations using a three way coupled CFD/DPBM/mass-transfer solver pave the way for a safer design of industrial-sized columns,where no correlations are available.

摘要：这份报纸在交换在哪儿的拓扑学下面考虑一组动人的僵硬身体的姿势同步问题每拓扑学的居住时间可以没有非零更低的界限。作者介绍一个平均居住时间条件描绘图在被连接的时间间隔的长度。由设计尖速度和线性速度的分布式的控制法律，有交换拓扑学的多重僵硬身体的靠近环的动力学能被变换成一个混合动态系统。作者采用 Lyapunov 稳定性定理，并且证明姿势同步能在平均居住时间条件下面被到达。而且，作者在一个类似的平均居住时间条件下面调查领导人追随者模型的姿势同步问题。模拟例子被给说明结果。

摘要：高阶拓扑绝缘体展现出新奇的体-边对应关系,即d维n阶拓扑绝缘体具有(d-n)维拓扑保护的边界态.近年来,高阶拓扑绝缘体的相关物理概念已经被拓展到光子晶体、声子晶体等体系中.本文着重讨论声波高阶拓扑绝缘体的边界态在波调控中的具体应用.作者利用原胞的镜像对称性和滑移对称性,设计出一种拓扑非平庸的三维声子晶体.该声子晶体的体能带可由非平庸的量子化体极化表征,从而在不同维度的边界上存在拓扑保护的二维表面态、一维棱态、零维角态.作者对二维表面态和一维棱态加以利用,在实验上实现了拓扑边界态主导的声波在不同维度上的传播操控.具体来说,通过设计二维表面态的色散的设计,实现了声波的负折射;通过利用不同方向上的一维棱态传输,实现了三维里的声干涉.这些结果展示了高阶拓扑绝缘体在操控波传播方面具有独特的应用前景.

摘要：推迟的很少层的热传导六角形的硼氮化物(h-BN ) 表试验性地用一个 noncontact micro-Raman 光谱学方法被调查。为单层(1L ) 的一阶的温度系数， bilayer (2L ) 并且九层(9L ) h-BN 表被测量是(当时， electrospinning 准备的 3.41 xide nanofibers 被期望减少了热电导率与体积样品相比。自从它包含复杂样品准备方法，热电导率正在质问的 nanofibers 的大小。在这个工作，我们在场对单个 nanofiber 的热电导率的大小合适的一个新奇方法。一 microelectro 机械(MEMS ) 设备被设计了并且制作了在单个 nanofiber 上执行热传导性大小。一个特殊 Si 模板被设计收集并且转单个 nanofibers 到 MEMS 设备名上吗？

摘要：自从 MoS2 表的性质对边结构敏感，有常规边或可控制的形状的 Patterning ultrathin MoS2 层正在呼吁。在这个工作，我们介绍了一种简单、有效、控制得好的技术由简单地在空中加热样品与面向井的等边的三角形的坑蚀刻分层的 MoS2 表。各向异性的氧化蚀刻被包围温度和 MoS2 层的数字极大地影响，坑由此随包围温度和 MoS2 层的数字的增加缩放增加。第一原则的计算被执行了解释三角形的坑的形成机制。这种技术把一条其他的大街提供给设计 MoS2 表的结构。

摘要：目的:1.通过分析Riga板的抽吸效应来控制流体运动和减少摩擦力和压力阻力;2.利用磁场的速度滑移效应来控制流体的流速;3.基于辐射原理控制热传导并减小阻力。创新点:1.本研究可应用于核电厂、飞机、潜艇以及卫星等设施中推进装置的设计;2.本研究可用于防止边界层分离以减少湍流的产生。方法:1.构建基于偏微分方程的数理模型;2.利用相似变换法将偏微分方程简化为常微分方程;3.利用Matlab内置求解器bvp4c对常微分方程组进行数值求解;4.基于求解结果讨论稳定性。结论:1.对于拉伸/收缩两种情形的Riga板问题都存在对偶解;2.数值求解结果显示表面摩擦系数和表面传热率均会随着吸力的增大而增大,而随拉伸/收缩参数?的增大而减小;3.上支解的努塞尔数增大而下支解减小;4.辐射会提高边界层内的温度,而增强滑移效应则会提高流速同时降低边界层温度;5.只有上支解是长期稳定的。

摘要：In this paper, we study a new method in shape adjustment ofS-λcurves. By examples of finite and infinite degree generation function, we get the conclusion thatS-λcurves can be adjusted by perturbation of generation functionS（t）while the control points and parameters hold.

摘要：The use of robotic manipulators in remote and sensitive areas calls for more robust solutions when handling joint failure, and the industry demands mathematically robust approaches to handle even the worst case scenarios. For both serial and parallel manipulators torque failure is indeed a worst case scenario. Thus, a systematic analysis of the effects of external forces on manipulators with passive joints is presented. For serial manipulators we find under what conditions the robot is conditionally equilibrated, that is, equilibrated with respect to a specific external force. These conditions are, as expected, very restrictive. The serial, or subchain, case serves as a good platform for analyzing parallel manipulators. In parallel manipulators passive joints can appear as a design choice or as a result of torque failure. In both cases a good understanding of the effects that passive joints have on the mobility and motion of the parallel manipulator is crucial. We first look at the effects that passive joints have on the mobility of the mechanism. Then, if the mobility considering passive joints only is not zero we find a condition similar to the serial case for which the parallel manipulator is conditionally equilibrated with respect to a specific external force.

摘要：Resorting to cubic spline function instead of parametric spline representation, an explicit fairness indicator and an efficient fairing algorithm for 2D curves are presented. The input point sequence is firstly partitioned into several overlapped function segments. For each segment, a cubic spline function is used as the representation tool which entails a polyline approximation of curvature plot. Based on the extrinsic relationship between the polyline and the positions of data points, a coarse-to-fine faring method is proposed which efficiently identifies and eliminates the unnecessary inflection points. Our algorithm generates the best results to date, which is validated by numerous practical examples.