摘要：This work presents the design of a novel static-triggered power-rail electrostatic discharge(ESD)clamp circuit. The superior transient-noise immunity of the static ESD detection mechanism over the transient one is firstly discussed. Based on the discussion, a novel power-rail ESD clamp circuit utilizing the static ESD detection mechanism is proposed. By skillfully incorporating a thyristor delay stage into the trigger circuit(TC), the proposed circuit achieves the best ESD-conduction behavior while consuming the lowest leakage current(Ileak) at the normal bias voltage among all investigated circuits in this work. In addition, the proposed circuit achieves an excellent false-triggering immunity against fast power-up pulses. All investigated circuits are fabricated in a 65-nm CMOS process. Performance superiorities of the proposed circuit are fully verified by both simulation and test results. Moreover, the proposed circuit offers an efficient on-chip ESD protection scheme considering the worst discharge case in the utilized process.

摘要：This paper presents a novel topology optimization method to design graded lattice structures to minimize the volume subject to displacement constraints based on the independent continuous mapping(ICM)***,the effective elastic properties of graded unit cells are analyzed by the strain energy-based homogenization method.A surrogate model using quartic polynomial interpolation is built to map the independent continuous topological variable to the effective elastic matrix of the unit cell and set up the relationship between the macroscale structure and microscale unit ***,a lightweight topology optimization model is established,which can be transformed into an explicitly standard quadratic programming problem by sensitivity analysis and solved by dual sequential quadratic ***,several numerical examples demonstrate that graded lattice structures have a better lightweight effect than uniform lattice structures,which validates the effectiveness and feasibility of the proposed *** results show that graded lattice structures become lighter with increasing displacement *** addition,some diverse topological configurations are *** method provides a reference for the graded lattice structure design and expands the application of the ICM method.

摘要：随着文化的多样性发展,传统工艺与现代设计的结合成为服装设计界追求创新和个性化的重要手段。蜀绣绣法独特,色彩丰富,文化内涵深厚,能为现代服装设计提供无限的创意灵感和新的表现形式。对蜀绣的历史发展、技术特征及其在现代服装设计中的创新思维展开深入探讨,有助于揭示传统工艺在现代设计语境下的转化与再创造。

摘要：兆瓦级大功率并网变流器的开关频率较低,延迟和离散化误差对控制性能影响较大,导致动态响应慢、电网背景谐波影响大等问题。因此,直接离散域控制系统设计成为必要。该文针对LCL滤波并网变流器建立离散域数学模型,并基于此提出桥臂侧电流和网侧电流融合的离散域电流控制器。同时,为了在不额外增加电流传感器和检测电路的情况下获取并网电流信息,设计电容电压微分器,实现网侧电流的估算,降低硬件复杂性和控制成本。研究表明,该文设计的离散域电流控制器,具有较好的动态性能和电网背景谐波抑制能力。最后,通过硬件在环半实物仿真系统对所提设计进行了实验验证。

摘要：文中研究基于多正弦扰动信号注入的大功率并网逆变器电网阻抗测量技术。选取多正弦信号作为电压扰动,参考空间光场理论中的Gerchberg-Saxton相位恢复算法对扰动信号进行优化设计;剪辑函数作为其中的关键要素,能够决定扰动信号时域波峰的剪辑速度和剪辑能力;为提升上述性能,提出采用反正切函数代替传统算法中的对数剪辑函数,仿真结果表明,相位恢复算法的剪辑性能得到大幅提升;随后,通过逆变器将扰动信号注入电网,采用Gauss-Newton非线性最小二乘法对采集到的扰动信号特征谐波频率点的信息进行曲线拟合,获取当前电网阻抗信息;最后,于搭建的1.5 MW并网逆变器RT-Lab平台进行多弱电网场景下的阻抗测量实验,实验结果验证了此方案的有效性和准确性。

摘要：“划一性”的教学模式不能满足个性化发展的需求。文章将个性化教学理念与构建主义理论、多元智力理论、学习者需求理论和语言学习风格理论相结合,阐释其内涵意义。因此,文章结合国家和校本教学目标,从艺术类学生需求出发,以个体差异为基础,发挥教师主导作用,探索促进学生英语学业成效的有效方式。本研究从个性化教学目标出发,利用教材资源进行个性化教学案例设计,根据学业成效要素来讨论如何将个性化教学应用于大学英语教学中。

摘要：永磁同步电机电流滑模控制具有较好的参数鲁棒性,但控制精度受到滑模抖振的影响,且抖振抑制与抗扰性之间存在矛盾。为此,该文提出一种基于增强型扩张状态观测器的二阶终端滑模电流控制方案,可以有效提升电流控制性能。通过二阶终端滑模控制器的设计,将一阶积分快速终端滑模嵌套在二阶非奇异终端滑模面中,使得滑模抖振得到较好的抑制,同时实现电流无稳态误差的快速收敛。通过引入扩张状态观测器对扰动信号的集总估计与补偿,缓解了抖振与抗扰性之间的矛盾,进一步提升了电流精度。针对数字控制的延迟影响,设计了Smith预估器,提升了扰动补偿精度。最后,通过实验对该文所设计的电流控制方案进行验证,并通过对比展示了该方案的有效性。

摘要：为提高工位数固定的U型拆卸线拆卸效率,减少有害部件对操作人员的潜在威胁,针对高价值零部件和有害零部件的拆卸需求,本文提出了工位数固定的U型拆卸线部分拆卸平衡问题,建立了以最小化节拍时间、高危工位数目和负载均衡为目标的优化模型,并设计了改进的变邻域搜索算法进行求解.在编码过程中提出一种基于零部件释放位置的选择策略,以减少前继零部件拆卸顺序对编码的影响;提出最小偏差二分法,有效减少解码的迭代次数;提出瓶颈挤压局部搜索策略,用以优化节拍时间和均衡负载指标.通过与其他算法对比,结果表明改进的变邻域搜索算法求解具有优越性,并且可实现对工位数固定的U型拆卸线部分拆卸平衡问题的高效求解.

摘要：针对无人机降落阶段中无人船受水面波浪影响导致图像产生运动模糊以及获取无人机相对位姿精度低且鲁棒性差的问题,提出一种基于多模型关键点加权融合的6D目标位姿估计算法,以提高位姿估计的精度和鲁棒性.首先,基于无人船陀螺仪得到的运动信息设计帧间抖动模型,通过还原图像信息达到降低图像噪声的目的;然后,设计一种多模型的级联回归特征提取算法,通过多模型检测舰载视觉系统获取的图像,以增强特征空间的多样性;同时,将检测过程中关键点定位形状增量集作为融合权重对模型进行加权融合,以提高特征空间的鲁棒性;紧接着,利用EPnP(Efficient perspective-n-point)计算关键点相机坐标系坐标,将PnP(Perspective-n-point)问题转化为ICP(Iterative closest point)问题;最终,基于关键点解集的离散度为关键点赋权,使用ICP算法求解位姿以削弱深度信息对位姿的影响.仿真结果表明,该算法能够建立一个精度更高的特征空间,使得位姿解算时特征映射的损失降低,最终提高位姿解算的精度.

摘要：Objectives:This study aims to develop the Directive and Nondirective Support Scale for Patients with Type 2 Diabetes(DNSS-T2DM)to measure diabetes-specific support and patients’preference as well as evaluate the construct validity and reliability of the ***:A cross-sectional study was conducted in Tongzhou District,Beijing,China from July to September 2015.A total of 474 participants who had been diagnosed as type 2 diabetes by physicians and completed the DNSS-T2DM were *** original 11-item DNSS-T2DM contains five items on nondirective support(Items 1-5)and six items on directive support(Items 6-11).There were two parallel questions for each item with one to measure the preference for support(Preference part)and the other to measure the perception of support in reality(Reality part).The final DNSS-T2DM was determined based on the results of the exploratory factor analysis(EFA).The construct validity of the final DNSS-T2DM was evaluated by the confirmatory factor analysis(CFA).The reliability was evaluated by internal consistency with Cronbach’sα***:A final 7-item DNSS-T2DM loaded on 2 factors with four items representing nondirective support and three items representing directive support was determined based on the *** CFA indicated a satisfactory construct *** internal consistency of the 7-item DNSS-T2DM as well as the nondirective support items was satisfactory with Cronbach’sα≥***:Our study supported the validity and reliability of the 7-item *** studies on the application of the DNSS-T2DM in different settings and population are needed.