摘要：转换型阳极材料因较高的比容量在储锂方面具有较大的应用潜力,但是严重的体积膨胀和低电导率限制了此类电极材料的倍率和循环性能.本研究设计了一种双金属锌锰基金属有机骨架(ZnMn-MOF)材料,并成功地将其转化成多孔炭封装的MnO颗粒(MnO/PC)复合电极材料.配位锌组元的模板和活化作用赋予PC基体多孔结构,能够显著地提高PC基体与MnO颗粒的相容性,导致MnO颗粒完全封装于PC基体中.更重要的是,PC基体的多孔结构为缓冲MnO的体积变化提供了足够的空间,经过反复的充放电循环后MnO仍完全封装于PC基体而不发生破裂乃至破碎.研究结果表明,MnO/PC同时具有较高的电荷储存容量、优异的倍率性能和超长的循环稳定性.MnO/PC在0.1 A g^(-1)时具有768 mA h g^(-1)的比容量,在0.7 A g^(-1)时其比容量仍能保持487 mA h g^(-1),并且在0.3 A g^(-1)循环500次后性能未衰减.值得关注的是,MnO/PC在锂离子电容器中与电容型活性炭电极表现出良好的匹配性,组装的锂离子电容器在比功率为210Wkg^(-1)时实现了153.6Wh kg^(-1)的比能量,并且在比功率为63.0kW kg^(-1)时仍能维持71.8W h kg^(-1)的比能量.

摘要：In this work, the extractive distillation with heat integration process is extended to separate the pressure-insensitive benzene-cyclohexane azeotrope by using furfural as the entrainer. The optimal design of extractive distillation process is established to achieve minimum energy requirement using the multi-objective genetic algorithm, and the results show that energy saving for this heat integration process is 15.7%. Finally, the control design is performed to investigate the system's dynamic performance, and three control structures are studied. The pressure-compensated temperature control scheme is proposed based on the first two control structures, and the dynamic responses reveal that the feed disturbances in both flow rate and benzene composition can be mitigated well.

摘要：Global illumination is the core part of photo-realistic rendering. The photon mapping algorithm is an effective method for computing global illumination with its obvious advantage of caustic and color bleeding rendering. It is an active research field that has been developed over the past two decades. The deficiency of precise details and efficient rendering are still the main challenges of photon mapping. This report reviews recent work and classifies it into a set of categories including radiance estimation, photon relaxation, photon tracing, progressive photon mapping, and parallel methods. The goals of our report are giving readers an overall introduction to photon mapping and motivating further research to address the limitations of existing methods.

摘要：This paper extends the unknown control coefficients with lower and upper constant bounds to the ones which may take arbitrarily large and /or small *** the existing methods are no longer applicable and the technical obstacles caused by the extensions are essential,new control design scheme should be exploited to the global practical *** the approaches of Nussbaum-gain and adding a power integrator,the authors successfully propose the design scheme of the adaptive practical tracking controller for the *** is shown that the designed controller guarantees that all the closed-loop system states are bounded and the tracking error becomes prescribed arbitrarily small after a finite time.

摘要：In this paper,the mechatronic design and maneuverability analysis of a novel robotic shark are *** obtain good maneuverability,a barycenter regulating device is designed to assist the posture adjustment at low *** on the Newton-Euler approach,an analytical dynamic model is established with particular consideration of pectoral fins for threedimensional *** hydrodynamic coefficients are computed using computational fluid dynamics(CFD)*** amplitudes and phases are determined by fitting an optimized fish body *** performance of the robotic shark is estimated by varying the oscillation frequency and offset *** results show that with oscillation frequency increasing,the swimming speed increases *** robotic shark reaches the maximum swimming speed of 1.05 m/s with an oscillation frequency of 1.2 ***,the turning radius decreases nonlinearly as the offset angle *** robotic shark reaches the minimum turning radius of 1.4 times the body length with 0.2 Hz frequency and 12°offset *** the vertical plane,as the pectoral fin angle increases,the diving velocity increases nonlinearly with increase rate slowing down.

摘要：本文研究了一类计及电动汽车的电力系统中的负荷频率控制问题.首先,文章将电动汽车模型与传统的负载频率控制模型相结合,在未知扰动波动范围的条件下设计了自适应滑模控制律.其次,本文分别考虑了电网调频中的匹配扰动和不匹配扰动问题,并利用李亚普诺夫稳定性理论导出了匹配和不匹配条件下的系统稳定的充分条件.最后,通过两个区域电力系统的仿真结果表明,电动汽车作为电源和负载都可以提高电网的频率稳定性,所设计的控制器可以有效地调节电网的频率波动.

摘要：本文通过先进的实时原位磁性测试成功揭示了碱金属离子电池中的Li^(+)、Na^(+)、K^(+)的界面空间电荷存储机制.磁性测试结果表明,在FeSe_(2)等过渡族金属材料碱金属离子电池体系中,M^(+)(Li^(+)/Na^(+)/K^(+))和自旋极化电子可以分别存储在M2Se和Fe中,即界面空间电荷存储机制.这说明FeSe_(2)碱金属离子电池的储能机制不仅包含嵌入和转化反应,还包括界面空间电荷存储机制.此外,根据Fe/M2Se界面体系中空间电荷存储M^(+)的能力不同,磁学以及动力学测试结果进一步证明了碱金属离子半径是影响空间电荷存储的重要因素.该研究表明磁性测试是研究过渡族金属基材料的储能机制以及电化学过程中复杂界面效应的一种强有力的分析表征手段,为设计具有大存储容量和高功率密度的先进储能装置奠定了坚实的基础.

摘要：The resolution and quality of the depth map captured by depth cameras are limited due to sensor hardware limitations, which becomes a roadblock for further computer vision applications. In order to solve this problem, we propose a new method to enhance low-resolution depth maps using high-resolution color images. The structural-aware term is introduced because of the availability of structural information in color images and the assumption of identical structural features within local neighborhoods of color images and depth images captured from the same scene. We integrate the structural-aware term with color similarity and depth similarity within local neighborhoods to design a local weighting filter based on structural features. To use non-local self-similarity of images, the local weighting filter is combined with the concept of non-local means, and then a non-local weighting filter based on structural features is designed. Some experimental results show that super-resolution depth image can be reconstructed well by the process of the non-local filter and the local filter based on structural features. The proposed method can reconstruct much better high-resolution depth images compared with previously reported methods.

摘要：金属有机骨架(MOFs)衍生的Co基催化剂用于芳香硝基化合物选择加氢引起了广泛的关注,但催化剂合成过程中使用大量溶剂,且对催化剂中活性中心的认识存在争议.本文开发了一种固相合成策略,在不使用任何溶剂的情况下获得MOF前体材料,经发泡和热解处理获得Co@NC催化剂.研究发现,800℃热解所得的催化剂中Co纳米颗粒被氮掺杂石墨烯壳层包裹,在3-硝基苯乙烯的加氢过程中表现出~100%的转化率,3-乙烯基苯胺的选择性大于99%,同时,该催化剂具有良好的循环稳定性和底物普适性.表征和实验结果证明该催化剂中Co–N物种为活性中心,其含量可通过热解温度进行调变,且催化性能与Co–N物种的含量存在正相关关系.本工作为设计用于选择加氢反应的高效Co基催化剂提供了一种新的绿色合成策略.

摘要：The linguistic dynamic systems (LDSs) based on type-1 fuzzy sets can provide a powerful tool for modeling,analysis,evaluation and control of complex ***,as pointed out in earlier studies,it is much more reasonable to take type-2 fuzzy sets to model the existing uncertainties of linguistic *** this paper,the LDS based on type-2 fuzzy sets is studied,and its reasoning process is realized through the perceptual reasoning *** properties of the perceptual reasoning method based LDS (PR-LDS) are *** properties demonstrated that the output of PR-LDS is intuitive and the computation complexity can be reduced when the consequent type-2 fuzzy numbers in the rule base satisfy some ***,a data driven method for the design of the PR-LDS is *** last,the effectiveness and rationality of the proposed data-driven method are verified by an example.