SAdaBoundNc: an adaptive subgradient online learning algorithm with logarithmic regret bounds

Neural Computing and Applications - Adaptive (sub)gradient methods have received wide applications such as the training of deep networks. The square-root regret bounds are achieved in convex...     

Proximity-Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO3

Ferromagnetic materials with a strong spin-orbit coupling (SOC) have attracted much attention in recent years because of their exotic properties and potential applications in energy-efficient spintronics. However, such materials are scarce in nature. Here, a proximity-induced paramagnetic to ferromagnetic transition for the heavy transition metal oxide CaRuO₃ in (001)-(LaMnO₃/CaRuO₃) superlattices is reported. Anomalous Hall effect is observed in the temperature range up to 180 K. Maximal anomalous Hall conductivity and anomalous Hall angle are as large as ∼15 Ω⁻¹ cm⁻¹ and ∼0.93%, respectively, by one to two orders of magnitude larger than those of the typical 3d ferromagnetic oxides such as La_0.67Sr_0.33MnO₃. Density functional theory calculations indicate the existence of avoid band crossings in the electronic band structure of the ferromagnetic CRO layer, which enhances Berry curvature thus strong anomalous Hall effects. Further evidences from polarized neutron reflectometry show that the CaRuO₃ layers are in a fully ferromagnetic state (∼0.8 μ_B/Ru), in sharp contrast to the proximity-induced canted antiferromagnetic state in 5d oxides SrIrO₃ and CaIrO₃ (∼0.1 μ_B/Ir). More than that, the magnetic anisotropy of the (001)-(LaMnO₃/CaRuO₃) superlattices is eightfold symmetric, showing potential applications in the technology of multistate data storage.     

Novel,liquid crystal formula to overcome LTPS LCD image sticking without adjustment of gamma code,optical, VHR and IS evaluation

In this article, novel n-FFS liquid crystal material from Slichem was used in order to elevate the anti-backlight long aging effect; a trace amount of free radical trap HALS-like additive was added, the principle of which can be expressed via Denisov cycle, confirmed by measuring the temporal VHR changes in test cells; three different resolution (FHD ~ QHD) models paired with N19 and N21 were selected for testing by comparing the actual panel. It is verified that the optimized material greatly improves the image sticking performance of the panel and keeping optical performance.     

DDNSR: a dual-input degradation network for real-world super-resolution

Pattern Analysis and Applications - Recently, Real-World Super-Resolution has become one of the most popular research fields in the scope of Single Image Super-Resolution, as it focuses on...     

基于网源协同的300MW 机组负荷快调及综合调频技术研究

大力发展新能源和大规模外电入鲁是山东实现新旧动能转换、推动经济快速平稳发展的关键之举,截至017年,新能源发电量和外电入鲁电量已占全省发电量的40.98％,到2018年风电和光电装机容量已达到千万千瓦 级别.但是,新能源受天气因素制约,一直处于随机波动状态,实时干扰电网频率,直接影响人民生活和工业生产, 甚至会产生弃风弃光事件;而特高压直流输电线路一旦出现故障,就会产生巨大供电缺口,导致电网频率突降,极有 可能引发大面积停电事故,造成重大经济损失和不良社会影响.因此,火电机组必须具备良好的一次调频和 AGC等 涉网性能,才能弥补新能源发电量波动和外电入鲁故障造成的频率波动,才能破解新能源消纳难题,为准确应对外电 故障提供数据支撑。     

Design of a 2-DOF-PID controller using an improved sine–cosine algorithm for load frequency control of a three-area system with nonlinearities

This paper proposes an improved sine–cosine algorithm (ISCA) based 2-DOF-PID controller for load frequency control. A three-area test system is built for study, while some physical constraints (nonlinearities) are considered for the investigation of a realistic power system. The proposed method is used as the parameter optimizer of the LFC controller in different scenarios. The 2-DOF-PID controllers are used because of their capability of fast disturbance rejection without significant increase of overshoot in set-point tracking. The 2-DOF-PID controllers’ efficacy is observed by examining the responses with the outcomes obtained with PID and FOPID controllers. The simulation results with the suggested scheme are correlated with some of the existing algorithms, such as SCA, SSA, ALO, and PSO in three different scenarios, i.e., a disturbance in two areas, in three areas, and in the presence of physical constraints. In addition, the study is extended to a four-area power system. Statistical analysis is performed using the Wilcoxon Sign Rank Test (WSRT) on 20 independent runs. This confirms the supremacy of the proposed method.     

跨谱段SAR散射中心多维参数解耦和估计方法

微波光子雷达发射大带宽跨谱段的信号,为目标的精细电磁特性描述和准确识别提供基础的同时,也亟需与之相应的大带宽大转角情况下的电磁模型参数提取方法.相比窄带条件,跨谱段信号数据量大,所含物理量信息维度高且复杂,大转角情况下距离和方位向耦合.该文提出跨谱段SAR散射中心多维参数解耦和估计方法,首先结合极坐标格式算法(PFA)和属性散射中心模型构造2维解耦波数域散射中心模型,再结合坐标下降法(CDA)将复杂的高维耦合参数估计方法简化为循环迭代的1维参数估计方法,有效降低字典维度和估计复杂度,并引入Hooke-Jeeves算法提高估计精度.最后根据各个散射中心的参数估计结果对它们的结构和位置进行识别,对仿真数据的处理实验验证了该文方法的有效性.     

Bioinspired yeast microcapsules loaded with self-assembled nanotherapies for targeted treatment of cardiovascular disease

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关于赣南客家文化产品与包装设计的思考

客家文化是以汉民族传统文化为主体,融合了畲、瑶等土著民族文化而形成的一种多元文化;她具有质朴无华的风格,务实避虚的精神。与闽西、粤东相比,赣南客家文化以其历史悠久和内容丰厚而为世人所瞩目;它包括历史文化遗迹、姓氏宗族文化、方言文化、民居文化、饮食文化、服饰文化、民俗文化、民间文艺等方面。文章主要介绍赣南客家文化产品,提出客家产品包装从设计要素方面着手,借鉴和运用相关的客家文化元素,提升产品文化的品位与艺术内涵,提升包装设计的创意品位,以提升客家特色产品整体形象,更好地宣传与开发客家文化产品,让更多人了解赣南客家文化。     

Silicon-based microelectrode arrays for stimulation and signal recording of in vitro cultured neurons

Microelectrode arrays (MEAs) for stimulation and signal recording of in vitro cultured neurons are presented.Each MEA is composed of 60 independent electrodes with 59 working ones and one reference one.These electrodes are divided into 30 pairs.Through each pair of electrodes,four independent states can be realized to define the accessing modes of neurons cultured on the surface of the electrodes.A total MEA covers an area of 10 mm×10 mm.MEAs are fabricated in a silicon-based semiconductor process.An implemented MEA is bonded on a specially designed printed-circuit-board (PCB) and surrounded by a culture chamber.An impedance measurement has been made to verify the electrical characteristics of MEAs.The surface was modified to enhance the biocompatibility.A series of PC12 cells culture experiments validates the effectiveness of the modification.An extracellular signal recording experiment with acetylcholine (Ach) as a stimulant has been carried out,and the results show the feasibility of MEAs for extracellular action potential recording.Extracellular electrical stimulation and recording experiments have been carried out too.They indicate that MEAs can be used for extracellular stimulation,recording,simultaneous stimulation and recording,and isolation of PC12 cells network cultured in vitro.