摘要：Superpixel segmentation is the oversegmentation of an image into a set of homogeneous regions. Superpixel has many specific properties and has been commonly used as supporting regions for primitives to reduce computations in various computer vision tasks. One property of superpixels is compactness, which is preferred in some applications. In this paper, we give an review on image superpixel segmentation algorithms proposed in recent years. Superpixel segmentation approaches are classified based on the compactness constraint and their main idea are introduced. We also compare these algorithms in visual and evaluate them with five common measurements.

摘要：锂金属电池被认为是最有前景的下一代储能设备之一,但是锂金属电池的安全性问题以及锂枝晶生长问题严重阻碍了它的实用化进程.固态电解质可以有效解决这一安全性问题,表现出能够抑制锂枝晶生长的巨大潜力,并因此受到大家的关注.其中聚环氧乙烷(PEO)基固态电解质由于具有较高的安全性以及出色的柔韧性,被认为是一类非常有应用前景的固态电解质.但是,其固有的半结晶特性以及较差的力学性能导致它们在室温下的离子电导率较低,并且在高温下不能有效地抑制锂枝晶生长.为改善上述问题,本文设计并合成了一种新型的珊瑚状Li_(6.25)Al_(0.25)La_(3)Zr_(2)O_(12)(C-LALZO)活性陶瓷填料来增强PEO聚合物电解质,制备得到的复合固态电解质(PLC)表现出更高的离子电导率和机械强度,保证了锂金属的均匀沉积/剥离.采用PLC的锂对称电池在60℃下循环1500小时不发生短路.组装得到的LiFePO_(4)/PLC/Li全固态电池在60和50℃时均有出色的循环稳定性.这项工作表明,通过调节填料的微观结构(如C-LALZO结构),可以有效地改善复合电解质的电化学性能.

摘要：Parameterization is one of the key problems in the construction of a curve to interpolate a set of ordered points. We propose a new local parameterization method based on the curvature model in this paper. The new method determines the knots by mi- nimizing the maximum curvature of quadratic curve. When the knots by the new method are used to construct interpolation curve, the constructed curve have good precision. We also give some comparisons of the new method with existing methods, and our method can perform better in interpolation error, and the interpolated curve is more fairing.

摘要：In this paper we present a new image zooming algorithm based on surface fitting with edge constraint. In surface fitting,we consider not only the relationship of corresponding pixels between the original image and the enlarged image, but also the neighbor pixels in the enlarged image according to the local structure of original image. Furthermore, during surface fitting, more interpolation constraints are used in the new algorithm for improving the precision of the super sampling pixels. The experimental results show that the new method outperforms the previous methods which based on surface fitting.

摘要：在钾离子电池石墨负极中,钾离子在石墨层间嵌入/脱出的模式能够实现储能,且具有较低工作电位和廉价等优势,表现出巨大的吸引力.然而,在缺乏足够界面保护等条件下,石墨负极在传统碳酸酯类电解液中容易发生连续的副反应,充放电容量会面临严重的持续衰减.本文从电解液设计的角度出发,针对石墨负极的钾离子存储问题,配制了阻燃的局部高浓度电解液,其特有的溶剂化结构可调控石墨表面固体电解质界面相,改善界面的结构稳定性和离子传导特性,从而实现石墨负极储钾的高稳定循环.同时,电解液的高阻燃特性也为钾离子电池的高安全性提供了保障.

摘要：在深部煤矿开采中,巷道往往处于高地应力和强动力扰动的动静载叠加应力环境。由动静载叠加诱发的围岩严重变形破坏甚至灾变失稳现象屡见不鲜,严重威胁煤矿的安全高效开采。因此,对动静载叠加作用下巷道围岩变形破坏规律的研究具有非常重要的理论价值和工程意义。本文以数值模拟中非线性动力计算为手段,研究了不同初始应力场及不同动载条件对巷道围岩的影响,获得了动静载叠加作用下巷道围岩变形破坏规律。结果表明:水平应力、垂直应力及动力扰动都与巷道围岩塑性破坏呈正相关关系,其中动力扰动对其影响最为明显。在相同应力条件下,巷道顶板和两帮的变形量及塑性破坏范围始终大于底板。水平应力对巷道变形量的影响比垂直应力更加强烈。所以,对于高应力环境中的矿井需加强地应力测试,并在巷道设计时充分考虑巷道布置及开采顺序。对于受动力扰动强烈的巷道,要求支护构件(锚杆、锚索等)在受到一定动力扰动后仍能保持其有效性。这一研究结果有助于进一步了解动静载叠加作用下深部巷道围岩变形破坏规律,并可为相似地质条件下巷道支护设计及优化提供相应的指导。

摘要：Clough-Tocher interpolation technique is widely used in CAGD, CG and finite-element analysis. Clough-Tocher patch is a cubic polynomial defined by twelve parameters. This paper discusses how to construct Clough-Tocher patch over a triangle. The main task is to give the explicit formula of Clough-Tocher patch in order to simplify the process of surface construction.

摘要：This paper is concerned with the sensor nodes’ hardware design of the wireless sensor *** focus on the electromagnetic compatibility design of the printed circuit *** this paper,we will give a schematic diagram first,and then,according to the layout,wiring rules and the knowledge of electromagnetic compatibility, we will present the design of the printed circuit board which has a good characteristic of electromagnetic compatibility.

摘要：Modularized circuit designs for chaotic systems are introduced in this ***,a typical improved modularized design strategy is proposed and applied to a new hyper-chaotic system circuit *** this paper,the detailed design procedures are *** simulations and physical experiments are conducted,and the simulation results are compared with Matlab simulation results for different system parameter *** results are consistent with each other and they verify the existence of the hyper-chaotic attractor for this new hyper-chaotic system.