High‐Power Lithium Metal Batteries Enabled by High‐Concentration Acetonitrile‐Based Electrolytes with Vinylene Carbonate Additive

To enable next‐generation high‐power, high‐energy‐density lithium (Li) metal batteries (LMBs), an electrolyte possessing both high Li Coulombic efficiency (CE) at a high rate and good anodic stability on cathodes is critical. Acetonitrile (AN) is a well‐known organic solvent for high anodic stability and high ionic conductivity, yet its application in LMBs is limited due to its poor compatibility with Li metal anodes even at high salt concentration conditions. Here, a highly concentrated AN‐based electrolyte is developed with a vinylene carbonate (VC) additive to suppress Li⁺ depletion at high current densities. Addition of VC to the AN‐based electrolyte leads to the formation of a polycarbonate‐based solid electrolyte interphase, which minimizes Li corrosion and leads to a very high Li CE of up to 99.2% at a current density of 0.2 mA cm^‐2. Using such an electrolyte, fast charging of Li||NMC333 cells is realized at a high current density of 3.6 mA cm^‐2, and stable cycling of Li||NMC622 cells with a high cathode loading of 4 mAh cm^‐2 is also demonstrated.     

一种探测巡航导弹的雷达能力评估方法

根据巡航导弹航迹规划特点和作战环境实际,估算面分布无源杂波的雷达散射截面（RCS,radarcrosssection）;然后计算某巡航导弹各方位角的RCS值,从而得出探测强杂波中巡航导弹所需的改善因子。通过比较雷达性能指标,优选适合探测巡航导弹的雷达,为装备部署雷达网和改进雷达参数提供评估依据。     

Al2O3高k栅介质的可靠性

利用反应溅射方法制备了等效氧化层厚度为3．45nm的Al2O3栅介质MOS电容，研究了Al2O3作为栅介质的瞬时击穿和恒压应力下的时变击穿等可靠性特征．击穿实验显示，样品的Al2O3栅介质的等效击穿场强大小为12.8MV／cm.在时变击穿的实验中，Al2O3栅介质表现出类似于SiO2的软击穿现象．不同栅压应力作用的测试结果表明，介质中注入电荷的积累效应是引起软击穿的主要因素，其对应的介质击穿电荷QBD约为30～60C／cm^2．     

An efficient algorithm for electromagnetic scattering from rough surfaces using a single integral equation and multilevel sparse-matrix canonical-grid method

An efficient algorithm for wave scattering from two-dimensional lossy rough surfaces is proposed. It entails the use of a single magnetic field integral equation (SMFIE) in conjunction with a multilevel sparse-matrix canonical-grid (MSMCG) method. The Rao-Wilton-Glisson (RWG) triangular discretization is adopted to better model the rough surface than the pulse basis functions used in the well-established SMCG method. Using the SMFIE formulation, only one unknown per interior edge of the triangular mesh approximating the rough surface is required, and the iterative solution to the moment equation converges more rapidly than that of the conventional coupled equations for dielectric rough surfaces. The MSMCG method extends the applicability of the SMCG method to rougher surfaces. Parallel implementation of the proposed method enables us to model dielectric surfaces up to a few thousand square wavelengths. Simulation results are presented as bistatic scattering coefficients for Gaussian randomly rough surfaces.     

影响低电压电泳芯片分离的主要因素

运用简化的低电压电泳芯片的运动梯度场的分离和控制模型 ,对低电压芯片的各参数与分离度、分离效率的关系进行了讨论     

蓝牙技术在无线监控中的应用

介绍了蓝牙技术的特点，蓝牙系统的组成，及其在无线监控系统中的应用。并提出了一种模型，有一定的实际意义。     

二维小波去噪在太阳射电数据处理中的应用

针对太阳射电数据的处理问题，对数据所含噪声，可以通过小波分解高频系数可以估计出其噪声强度。本文主要探讨二维小波方法在有关射电天文观测的数据消除噪声研究中的应用。     

垂直腔面发射激光器新型结构的特性比较

通过对一种微分量子效率可以大于1的新型多有源区隧道再生应变量子阱垂直腔面发射半导体激光器(VCSELs)结构,以及由此设计出的阈值电流更小、输出功率更大的器件与普通结构在反射率及注入电流都相同的条件下输出功率大小的比较及阈值电流密度大小的比较,从而在理论上证实了这种VCSELs新型结构的优势。     

企业信息化

主要介绍企业信息化的定义、内涵、外延、分类、层次及意义，并根据国内企业信息化建设的经验教训，提出了几点值得重视的建议。