快速充电器的改进与设计

基于快速充电要求引入变脉冲实施智能化的实时调节,对普通脉冲充电器进行改进,设计了新型的变脉冲充电电路,经实验证明改进后的变脉冲充电器能有效去除极化,缩短充电时间,提高充电效率和充电质量,达到快速充电的目的。     

智能网络磁盘存储系统通信协议分析

智能网络磁盘存储系统的出现,极大地提高了数据存储的效率和效果,在其实际运行中,存储系统的通信协议具有重要的作用,能够确保智能网络磁盘存储系统的正常、高效运行。因此,应当对这一问题进行细致的分析,从而推动存储技术的不断提高。     

用DCG制作全息显示屏的工艺研究

本文对应用ＤＣＧ制作全息显示屏的工艺进行了实验研究,从中比较出最佳的制版工艺,优选出满足课题要求的拍摄光路,并讨论了后处理工艺对全息显示屏质量的影响,最后还提出了一些尚待解决的问题。     

DCG窄带反射滤光片研制中胶膜厚度的理论设计

膜层的厚度是影响ＤＣＧ窄带反射滤光片性能指标的一个重要因素,本文应用分层介质膜理论对其进行了理论计算,计算中应用了均匀光学厚度的假设。     

流媒体存储系统的高速USB接口研究与实现

简要介绍了视频压缩标准H.264,比较了实现实时编解码的常用方案,着重介绍了在TMS320DM642芯片上实现的H.264视频编解码器算法及其优化方案,并针对现有方案的不足设计了基于CY7C68013的USB2.0存储系统的方案.     

导储能系统用电流型变流器控制超设计和实验

本文推导了SPWM控制下的电流型变流器的有功功率、无功功率和调制比、相位角的关系,设计了一种基于瞬时功率理论的电流型变流器功率闭环控制方法。结合变流器实验样机,对超导储能系统用电流型变流器四象限功率控制方法进行了验证．给出了试验波形。     

IRA码在体全息存储系统中的应用研究

在全息存储系统中,噪声分布是不均匀的,为了对存储的信息位进行不等保护,文中采用能纠不均匀错误的IRA码为系统的纠错码。通过高斯估计方法设计出适合全息存储系统的IRA码,并对其在系统中的应用进行了仿真,结果表明全息信道中IRA码的性能要远优于RS码。     

High‐Performance Organic Transistor Memory Elements with Steep Flanks of Hysteresis

High‐performance organic transistor memory elements with donor‐polymer blends as buffer layers are presented. These organic memory transistors have steep flanks of hysteresis with an ON/OFF memory ratio of up to 2 × 10⁴, and a retention time in excess of 24 h. Inexpensive materials such as poly(methyl methacrylate), ferrocene and copper phthalocyanine are used for the device fabrication, providing a convenient approach of producing organic memory transistors at low cost and high efficiency.     

Transition‐Metal‐Free Magnesium‐Based Batteries Activated by Anionic Insertion into Fluorinated Graphene Nanosheets

Considering resource abundance, high volumetric energy density, and safer anodic electroplating, the Mg‐based battery is thought to be one of the most promising systems beyond current Li‐ion batteries. However, the development of Mg batteries is hindered by the narrow electrochemical window of electrolytes as well as by inapplicable cathode frameworks. In this work, it is proposed, for the first time, to utilize a fast surface redox process to replace sluggish lattice migration for improving the kinetics of Mg batteries. Taking fluorinated graphene nanosheets (FGSs) as model material, a reversible capacity higher than 100 mAh g^?1 is achieved in a pseudocapacitance behavior from 2.75 to 0.5 V. Different from traditional storage mechanisms, this proof‐of‐concept Mg/FGS system is activated by a prior anionic process followed by reversible cationic storage. The dilution of charge density by forming large‐sized monovalent complex cations and the easy access to surface redox sites are responsible for the negligible voltage polarization without an evident MgF₂ nucleation phenomenon.     

抽水蓄能电站中水力干扰下的过渡过程及其稳定问题的研究

高水头抽水蓄能电站中，常采用一洞多机系统，所以机组之间水力联系紧密，本文建立了对水力干扰进行过渡过程计算所必须的既能进行大波动计算又可进入小波动的数学模型，并编制了计算程序，通过计算研究了部分机组停机过程中，其余机组在水力干扰下的过渡过程及稳定问题。