摘要：In this paper, a spatial perturbation scheme is proposed to suppress the spiral wave in the modified Orengonator model, which is used to describe the chemical reaction in the light-sensitive media. The controllable external illumination Ф is perturbed with a spatial linear function. In our numerical simulation, the scheme is investigated by imposing the external controllable illumination on the space continuously and/or intermittently. The numerical simulation results confirm that the stable rotating spiral wave still can be removed with the scheme proposed in this paper even if the controllable Ф changed vs. time and space synchronously. Then the scheme is also used to control the spiral wave and turbulence in the modified Fitzhugh-Nagumo model. It is found that the scheme is effective to remove the sable rotating and meandering spiral wave but it costs long transient period and intensity of the gradient parameter to eliminate the soiral turbulence.

摘要：为有效解决现有的基于深度学习的多元时间序列异常检测方法中模型对数据要求高,以及捕捉不同时序数据间的相关性差的问题,提出一种从局部与全局信息上改进时序卷积神经网络(temporal convolution network,TCN)的深度学习算法。学习不同时间粒度下数据间的特征依赖关系,在对时序数据特征进行捕捉分析后,通过重构和预测的联合优化实现并行计算数据的异常值。经仿真实验验证,改进后的算法相较其它传统算法,异常检测效果有明显提升。

摘要：为更好地延长婴儿手推车的使用周期,实现绿色设计原则,针对现有婴儿手推车存在的设计问题,在造型、功能和结构等方面对婴儿手推车进行改进设计。运用人机工程学方法对婴儿手推车的尺寸进行分析,利用仿生设计原理进行造型设计,对手推车的承重结构、刹车装置、减振装置和折叠结构进行改进,采用有限元分析软件ANSYS对车架壁厚进行静载承载能力分析。最终设计出一款兼顾美学与实用,可转化为脚踏车的婴儿手推车,并进行了样机制作验证,结果表明:改进设计后能有效地延长使用周期,为类似的产品设计提供参考。

摘要：In order to investigate the real-time cracking behavior of each component of a composite with strong interfacial bonding among lamellae, Ti-18 Nb(at.%) composite was prepared by spark plasma sintering(SPS), followed by hot-rolling, annealing, and quenching. The microstructure and mechanical properties were characterized by scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS), micro-region X-ray diffractometry(MRXRD), nanoindentation, and in-situ scanning electron microscopy tensile testing. The results show that the Ti-18 Nb consists of Ti-enriched, diffusion and Nb-enriched zones, and the sharp Nb gradient across different zones leads to inhomogeneous distribution of phase and mechanical properties. A remarkable finding is that the diffusion zones not only enable the cooperative deformation between the brittle Ti-enriched zones and the ductile Nb-enriched zones but also act as the crack-arresters to prevent the local cracks in the Ti-enriched zones from further propagating across the composite.

摘要：Lithium bis(fluorosulfonyl)imide(LiFSI) is a promising replacement for lithium hexafluorosphate due to its excellent properties. A solution to the corrosion of aluminum(Al) current collectors by LiFSI at elevated temperatures is essential. The mechanisms of Al corrosion in LiFSI-based electrolyte at 45 ℃ were studied with density functional theory calculations and spectroscopic investigations. It is found that the irregular, loose and unprotected AlF3 materials caused by the dissolution of co-generated Al(FSI)3 can exacerbate Al corrosion with the increase of temperature. Lithium bis(oxalate)borate(LiBOB) can effectively inhibit the Al corrosion with a robust and protective interphase;this can be attributed to the interfacial interactions between the Al foil and electrolyte. Boron-containing compounds promote the change from AlF3 to LiF, which further reinforces interfacial stability. This work allows the design of an interface to Al foil using LiFSI salt in lithium-ion batteries.

摘要：Supercontinuum(SC) generation in a dispersion-shifted fiber(DSF) pumped by a 10 GHz regeneratively mode-locked fiber laser(RMLFL) is *** of pump wavelength leads to a 20 dB bandwidth of 58.73 nm,which covers the whole C band and part of L *** an angle-tuning thin film filter,multi-wavelength and pico-second pulse trains of low chirp could be chosen from the SC *** spontaneous emission(ASE) induced degeneration of the achieved pulse trains is observed and discussed.

摘要：为实现单芯片的超高频读写器,提出了一种读写器基带处理器的设计方案。设计采用了微处理器IP核在AFS600上搭建一个读写器数字基带,在原本不支持调试模式的微处理器上扩展了片上调试功能,为集成开发环境Keil开发出动态链接库实现了对数字基带的在线调试。为实现ISO/IEC18000-6C协议,用硬件实现了收发通路原型,并在AFS600平台上完成了FPGA验证。设计采用TSMC0.25μm Embedded Flash工艺完成了芯片的版图设计。该基带处理器实现了读写器基带和标签的正常通信,为最终实现单芯片读写器创造了条件。

摘要：采用原位红外光谱法跟踪研究了酚醛型氰酸酯树脂的固化反应过程,获得了树脂固化反应过程中各基团的转化率与时间的关系,并对各固化阶段中基团的转化进行了分析,以指导酚醛型氰酸酯树脂的固化工艺制度的优化,最后确定其固化制度为120℃2h+150℃2h+180℃3h+200℃2h+250℃2h+300℃2h,实验证明该固化制度下树脂固化物力学性能与传统的酚醛树脂相当,且耐热性能更优异。

摘要：采用密度泛函理论(DFT,TDDFT)B3LYP/6-31G(d)和PBE0/6-31G(d)方法对苯乙烯/乙炔为端基,二噻吩(2T)、苯并二噻吩(TPT)和二苯并噻吩(PTP)为共轭桥的12个化合物进行了系统地计算研究.在分别优化中性态与离子态几何构型的基础上,获得了前线轨道能级、电离能(IPs)、电子亲合能(EAs)、重组能(λh/λe)和电子吸收光谱等信息.结果表明,苯乙炔基取代苯乙烯基对LUMO能级影响很小,但HOMO能级明显降低,能级差?E和激发能Ev增大,吸收光谱蓝移10～30 nm,多数苯乙炔基化合物的重组能均有所降低;端基相同共轭桥分别为2T,TPT和PTP时,HOMO能级逐渐降低,LUMO能级逐渐升高,?E和Ev依次增大,吸收光谱依次蓝移30～45 nm.研究结果还表明,TPT共轭桥化合物的重组能较小,且λh与λe相近,有利于载流子传输平衡,提高传输速率.本文设计的苯乙炔基苯并二噻吩(DPATPT)有望成为潜在的传输效率高、抗氧化能力强的载流子传输材料.

摘要：利用GDG型高压固结仪和自行研制的非饱和土湿陷三轴仪对陕西蒲城电厂Q2黄土一维和三维应力状态下的湿陷性进行了试验研究,分析了Q2黄土的湿陷特性。试验结果表明:一维状态下,Q2黄土以中等和弱湿陷为主,峰值湿陷系数随深度增加而变小,常规压力下不湿陷的Q2黄土在高压力下可能湿陷,Q2地层中黄土层的湿陷性总体上强于古土壤层,湿陷的敏感性较弱,大型工程宜用实际压力评价湿陷性。三维状态下,湿陷应变随浸水量的变化曲线可以近似分为3段,即湿陷应变缓慢增加段、快速发展段和基本不变段;浸水前的吸力、净围压、偏应力对湿陷过程均有影响,且偏应力和吸力的影响更明显;三轴浸水过程湿陷体应变随湿陷轴应变的增加而增大,几乎是一条直线,体现了湿陷变形的特殊性。