基于DSP和局域网的医疗护理监控系统的设计

随着社会的不断进步,人们对护理工作的要求也越来越高,护理工作好坏直接关系着医院的发展。因此,本文研究设计了一种基于DSP和局域网的医疗护理监控系统,并对此设计作了简要分析,促进了医院医疗护理工作的发展。     

基于滤波器组的船舶静电场跟踪

针对船舶静电场跟踪中先验信息缺失的问题,引入滤波器组方法,提出了一种新的船舶静电场跟踪算法。建立船舶静电场跟踪的状态空间模型,用水平电偶极子对船舶静电场进行建模;以渐进更新扩展卡尔曼滤波为基本滤波单元,采用一组滤波器对目标进行跟踪;根据电场计算公式设计滤波初值,并利用最大似然法确定可靠的跟踪轨迹。仿真和海上电偶极子跟踪实验表明,滤波器组方法能够有效地解决先验信息缺失条件下的船舶静电场跟踪问题,最大似然选择法能够筛选出正确的跟踪轨迹,在跟踪过程中滤波算法对方位信息更加敏感。     

Functional Materials for Memristor-Based Reservoir Computing: Dynamics and Applications

The booming development of artificial intelligence (AI) requires faster physical processing units as well as more efficient algorithms. Recently, reservoir computing (RC) has emerged as an alternative brain-inspired framework for fast learning with low training cost, since only the weights associated with the output layers should be trained. Physical RC becomes one of the leading paradigms for computation using high-dimensional, nonlinear, dynamic substrates. Among them, memristor appears to be a simple, adaptable, and efficient framework for constructing physical RC since they exhibit nonlinear features and memory behavior, while memristor-implemented artificial neural networks display increasing popularity towards neuromorphic computing. In this review, the memristor-implemented RC systems from the following aspects: architectures, materials, and applications are summarized. It starts with an introduction to the RC structures that can be simulated with memristor blocks. Specific interest then focuses on the dynamic memory behaviors of memristors based on various material systems, optimizing the understanding of the relationship between the relaxation behaviors and materials, which provides guidance and references for building RC systems coped with on-demand application scenarios. Furthermore, recent advances in the application of memristor-based physical RC systems are surveyed. In the end, the further prospects of memristor-implemented RC system in a material view are envisaged.     

某机载电子吊舱抗振动设计

介绍了某机载电子吊舱的抗振动、抗冲击设计方法。通过合理设计舱体骨架,并对分系统进行加固设计来提高某机载电子吊舱的机械环境适应能力。     

高压变频器助力华能邯峰电厂节能增效

本文主要介绍HARSVERT—A多电平型高压变频器助力华能邯峰电厂凝结水泵节能增效情况，结果表明，采用HARSVERT-A多电平型高压变频器对凝结水泵进行调速节能改造，具有投资省，见效快等特点。     

基于Nelder-Mead优化的PEMFC三阶RQ等效电路参数辨识研究

精确、有效的燃料电池等效电路有助于分析燃料电池内部工作情况,确保燃料电池系统稳定可靠地运行。针对燃料电池内部工作状态无法使用传感器精确监测的问题,提出了基于Nelder-Mead优化算法的PEMFC 3阶RQ等效电路参数辨识方法 ,根据电池工作原理建立3阶RQ非线性等效电路模型,将模型参数与实际物理意义相结合建立复数域下的实部、虚部加权目标函数,最后在电化学交流阻抗谱实验的基础上进行参数辨识研究。研究结果表明:在相同初始条件下,Nelder-Mead优化算法在精度、速度上与最小二乘法相当,但抗干扰能力更强;与遗传算法相比,精度相当但速度更高,可以用于燃料电池的在线参数辨识。     

自启动、宽调谐的ps掺Yb双包层光纤激光器

对连续泵浦的自启动、宽调谐的ps脉冲掺Yb^3＋双包层光纤激光器进行了实验研究。采用20m单模掺Yb^3＋双包层光纤作为增益介质,利用77MHz射频信号的声光调制器（AOM）作为频移器以及体光栅构成外腔,得到了重复频率为1GHz、平均功率为56．3mW以及脉宽小于60ps的脉冲,激光器的调谐范围超过40nm。     

Biomimetic Hygroscopic Fibrous Membrane with Hierarchically Porous Structure for Rapid Atmospheric Water Harvesting

Sorption-based atmospheric water generation (SAWG) is a promising strategy to alleviate the drinkable water scarcity of arid regions. However, the high-water production efficiency remains challenging due to the sluggish sorption/desorption kinetics. Herein, a composite sorbent@biomimetic fibrous membrane (PPy-COF@Trilayer-LiCl) is reported by mimicking nature's Murray networks, which exhibits outstanding water uptake performance of 0.77–2.56 g g⁻¹ at a wide range of relative humidity of 30%–80% within 50 min and fast water release capacity of over 95% adsorbed water that can be released within 10 min under one sun irradiation. The superior sorption–desorption kinetics of PPy-COF@Trilayer-LiCl are enabled by the novel hierarchically porous structure, which is also the critical factor to lead a directional rapid water transport and vapor diffusion. Moreover, as a proof-of-concept demonstration, a wearable SAWG device is established, which can operate 10 sorption–desorption cycles per day in the outdoor condition and produce a high yield of clean water reaching up to 3.91 kg m⁻² day⁻¹. This study demonstrates a novel strategy for developing advanced solar-driven SAWG materials with efficient water sorption–desorption properties.     

Boosting Piezo-Catalytic Activity of KNN-Based Materials with Phase Boundary and Defect Engineering

Although the piezo-catalysis is promising for the environmental remediation and biomedicine, the piezo-catalytic properties of various piezoelectric materials are limited by low carrier concentrations and mobility, and rapid electron-hole pair recombination, and reported regulating strategies are quite complex and difficult. Herein, a new and simple strategy, integrating phase boundary engineering and defect engineering, to boost the piezo-catalytic activity of potassium sodium niobate ((K, Na)NbO₃, KNN) based materials is innovatively proposed. Tur strategy is validated by exampling 0.96(K_0.48Na_0.52)Nb_0.955Sb_0.045O₃-0.04(Bi_xNa_4-3x)_0.5ZrO₃-0.3%Fe₂O₃ material having phase boundary engineering and conducted the defect engineering via the high-energy sand-grinding. A high reaction rate constant k of 92.49 × 10⁻³ min⁻¹ in the sand-grinding sample is obtained, which is 2.40 times than that of non-sand-grinding one and superior to those of other representative lead-free perovskite piezoelectric materials. Meanwhile, the sand-grinding sample has remarkable bactericidal properties against Escherichia coli and Staphylococcus aureus. Superior piezo-catalytic activities originate from the enhanced electron-hole pair separation and the increased carrier concentration. This study provides a novel method for improving the piezo-catalytic activities of lead-free piezoelectric materials and holds great promise for harnessing natural energy and disease treatment.     

Modulation of Electron Structure and Dehydrogenation Kinetics of Nickel Phosphide for Hydrazine-Assisted Self-Powered Hydrogen Production in Seawater

The electrocatalytic production of hydrogen from seawater provides a low-cost way to realize energy conversion, but is restricted by high potential for seawater electrolysis and the chlorine oxidation reaction (ClOR) at the anode. Here, the self-growth of Mo-doped Ni₂P nanosheet arrays with rich P vacancies on molybdenum-nickel foam (MNF) (Mo-Ni₂P_v@MNF) is reported as bifunctional catalyst for Cl-free hydrogen production by coupling hydrogen evolution reaction (HER) with hydrazine oxidation reaction (HzOR) in seawater. Impressively, the Mo-Ni₂P_v@MNF electrode as bifunctional catalyst has an excellent activity for overall hydrazine splitting (OHzS) with an ultralow voltage of only 571 mV at 1000 mA cm⁻² and can maintain stability for an ultra-long time of 1000 h at 100 mA cm⁻². Moreover, integration of OHzS into self-assembled hydrazine fuel cells (DHzFC) or solar cells can enable the self-powered H₂ production. The industrial hydrazine sewage as feed for the above eletrolysis system can be degraded to ≈5 ppb rapidly. Density functional thoery calculations demonstrate that the electronic structure modulation induced by P vacancies and Mo doping can not only achieve thermoneutral ΔG_H* for hydrogen evolution reaction but also enhance dehydrogenation kinetics from *N₂H₄ to *NHNH₂ for HzOR, achieving enhanced dehydrogenation kinetics.