海量船舶自动识别系统中数据检索系统的设计与实现

针对船舶自动识别系统( AIS)数据的发送周期快,中国沿海的船舶数量多的问题,利用键值对技术和分布式数据库构建海量船舶自动识别系统。通过船舶的移动通信业务标识码( MMSI)和船舶的AIS信息组成键值对,实现单船长期轨迹的存储和快速检索利用四叉树数据结构实现了区域数据的快速检索,实验结果表明本文构建的系统实现了海量AIS数据的存储并且对长期船舶数据查询速度提高6倍以上。     

Mesoporous NiS2 Nanospheres Anode with Pseudocapacitance for High‐Rate and Long‐Life Sodium‐Ion Battery

It is of great importance to exploit electrode materials for sodium‐ion batteries (SIBs) with low cost, long life, and high‐rate capability. However, achieving quick charge and high power density is still a major challenge for most SIBs electrodes because of the sluggish sodiation kinetics. Herein, uniform and mesoporous NiS₂ nanospheres are synthesized via a facile one‐step polyvinylpyrrolidone assisted method. By controlling the voltage window, the mesoporous NiS₂ nanospheres present excellent electrochemical performance in SIBs. It delivers a high reversible specific capacity of 692 mA h g^?1. The NiS₂ anode also exhibits excellent high‐rate capability (253 mA h g^?1 at 5 A g^?1) and long‐term cycling performance (319 mA h g^?1 capacity remained even after 1000 cycles at 0.5 A g^?1). A dominant pseudocapacitance contribution is identified and verified by kinetics analysis. In addition, the amorphization and conversion reactions during the electrochemical process of the mesoporous NiS₂ nanospheres is also investigated by in situ X‐ray diffraction. The impressive electrochemical performance reveals that the NiS₂ offers great potential toward the development of next generation large scale energy storage.     

基于Haar函数的分布参数系统辨识

借助于正交函数序列对分布参数系统进行辨识，是一种妊之有效的辨识方法。     

A High‐Rate V2O5 Hollow Microclew Cathode for an All‐Vanadium‐Based Lithium‐Ion Full Cell

V₂O₅ hollow microclews (V₂O₅‐HMs) have been fabricated through a facile solvothermal method with subsequent calcination. The synthesized V₂O₅‐HMs exhibit a 3D hierarchical structure constructed by intertangled nanowires, which could realize superior ion transport, good structural stability, and significantly improved tap density. When used as the cathodes for lithium‐ion batteries (LIBs), the V₂O₅‐HMs deliver a high capacity (145.3 mAh g^‐1) and a superior rate capability (94.8 mAh g^‐1 at 65 C). When coupled with a lithiated Li₃VO₄ anode, the all‐vanadium‐based lithium‐ion full cell exhibits remarkable cycling stability with a capacity retention of 71.7% over 1500 cycles at 6.7 C. The excellent electrochemical performance demonstrates that the V₂O₅‐HM is a promising candidate for LIBs. The insight obtained from this work also provides a novel strategy for assembling 1D materials into hierarchical microarchitectures with anti‐pulverization ability, excellent electrochemical kinetics, and enhanced tap density.     

超临界流体干燥法制备纳米ZrO2粉体及其煅烧行为研究

用超临界流体干燥法制备了纳米ZrO2粉体,并用不同热处理工艺进行处理,之后对样品进行TEM和XRD分析。结果表明,煅烧温度和煅烧时间对纳米ZrO2粉体性能的影响是显著的。随着煅烧温度的提高和时间的延长,粉体由t相转变为m相,晶粒尺寸逐渐增大,但是煅烧温度对ZrO2相组成和晶粒尺寸的影响比时间的影响更大。     

虚拟串口软件程序结构及其接口

针对目前工业以及民用领域中许多现场仪表设备管理软件不支持现场总线的现状，提出应用虚拟串口软件可以将这些管理软件平滑地移植到新的管理系统中，而不要修改原软件。文中首先介绍了虚拟串口软件的概念，后而以以太网作为现场总线的例子，详细给出了虚拟串口软件的程序结构及接口的设计方法。     

Strongly Coupled Pyridine‐V2O5·nH2O Nanowires with Intercalation Pseudocapacitance and Stabilized Layer for High Energy Sodium Ion Capacitors

Developing pseudocapacitive cathodes for sodium ion capacitors (SICs) is very significant for enhancing energy density of SICs. Vanadium oxides cathodes with pseudocapacitive behavior are able to offer high capacity. However, the capacity fading caused by the irreversible collapse of layer structure remains a major issue. Herein, based on the Acid–Base Proton theory, a strongly coupled layered pyridine‐V₂O₅·nH₂O nanowires cathode is reported for highly efficient sodium ion storage. By density functional theory calculations, in situ X‐ray diffraction, and ex situ Fourier‐transform infrared spectroscopy, a strong interaction between protonated pyridine and V?O group is confirmed and stable during cycling. The pyridine‐V₂O₅·nH₂O nanowires deliver long‐term cyclability (over 3000 cycles), large pseudocapacitive behavior (78% capacitive contribution at 1 mV s^?1) and outstanding rate capability. The assembled pyridine‐V₂O₅·nH₂O//graphitic mesocarbon microbead SIC delivers high energy density of ≈96 Wh kg^?1 (at 59 W kg^?1) and power density of 14 kW kg^?1 (at 37.5 Wh kg^?1). The present work highlights the strategy of realizing strong interaction in the interlayer of V₂O₅·nH₂O to enhance the electrochemical performance of vanadium oxides cathodes. The strategy could be extended for improving the electrochemical performance of other layered materials.     

中枢σ-2受体对神经精神疾病影响和治疗的研究进展

中枢σ-2 受体可能在神经精神疾病的发病和治疗中起重要作用。近年来,随着新型σ-2受体选择性配体的问世,其神经生物学相关研究取得了长足进展。最新研究发现,孕激素受体膜组分1（progesterone receptor membrane component 1,PGRMC1）可能是σ-2受体的一部分,这为σ-2受体的功能研究提供了新方向。因此,本文就σ-2受体在神经系统中的生理功能,以及σ-2受体对神经精神疾病的影响和治疗的相关研究进展作一综述。     

Novel hollow Ni0.33Co0.67Se nanoprisms for high capacity lithium storage

In this work, homogeneous Ni_0.33Co_0.67Se hollow nanoprisms were synthesized successfully in virtue of Kirkendall effect. It is the first time for bimetallic Ni-Co compounds Ni_0.33Co_0.67Se to be used in lithium-ion batteries (LIBs). Impressively, the Ni_0.33Co_0.67Se hollow nanoprisms show superior specific capacity (1,575 mAh/g at the current density of 100 mA/g) and outstanding rate performance (850 mAh/g at 2,000 mA/g) as anode material for LIBs. This work proves the potential of bimetallic chalcogenide compounds as high performance anode materials for LIBs.