Effect of vacuum treatment in diketopyrrolopyrrole (DPP) based copolymer with ratio controlled toluene- and benzene- functional groups for efficient organic photovoltaic cells: Morphological and electrical contribution

Solution-processed organic bulk-heterojunction (BHJ) photovoltaic cells using random copolymeric donor materials have been extensively reported due to their suitable film-forming characteristics and phase-separated nano-morphology. Here, ratio-controlled toluene-versus benzene-chemical group based diketopyrrolopyrrole (DPP) donor polymers mixed with a fullerene acceptor were investigated to fabricate an efficient photovoltaic active layer with improved electrical properties through a vacuum treatment. The vacuum process leads to an increase in the phase-separation with a low surface roughness and nanoscale-distributed crystallinity due to securing the dry time of the residual solvent and solvent additive within the active layer. Moreover, the optimized DPP-based donor with toluene (T) versus benzene (B) linkers and electron transporting layer leads to an improvement in the power conversion efficiencies of up to 6.31% under AM 1.5G illumination due to the contributions of an efficient charge transfer and reduced series resistance. Therefore, the organic semiconductor obtained with the ratio-controlled molecular structure and proper solvent drying process plays an important role in increasing the electrical and morphological properties to produce efficient organic solar cells.     

On local strong solutions to the Cauchy problem of the two-dimensional full compressible magnetohydrodynamic equations with vacuum and zero heat conduction

This paper concerns the Cauchy problem of the two-dimensional full compressible magnetohydrodynamic equations with zero heat-conduction and vacuum as far field density. In particular, the initial density can have compact support. We prove that the Cauchy problem admits a local strong solution provided both the initial density and the initial magnetic field decay not too slow at infinity.     

食品药品检验机构仪器设备计量信息的标准化管理

建立食品药品检验机构仪器设备计量的信息化规范管理方法。总结了传统人工计量管理的弊端,提出计量信息化管理的流程,将计量信息化管理分为计量计划申报、计量应急申报、计量信息登记、计量结果确认4个步骤,详细介绍了4个步骤中信息管理的主要内容及注意事项。建立食品药品检验机构仪器设备计量信息化管理的标准化规程,可以为仪器设备计量信息的动态监管提供支持。     

A model of nonlinear electrodynamics

A new model of nonlinear electrodynamics with two parameters is investigated. We also consider a model with one dimensional parameter. It was shown that the electric field of a point-like charge is not singular at the origin and there is the finiteness of the static electric energy of point-like charged particle. We obtain the canonical and symmetrical Belinfante energy–momentum tensors and dilatation currents. It is demonstrated that the dilatation symmetry and dual symmetry are broken in the models suggested. We have calculated the static electric energy of point-like particles.     

消防设备电源监控传感模块设计

针对市面上消防设备电源监控传感器采样精度差、通信不稳定、不符合国标规范等设计缺陷,以国家标准GB28184-2011《消防设备电源监控系统》为依据研究设计了一款电流电压型监控传感器。设计创新点在于采用RN8209G芯片进行采样,并通过CAN总线进行通信,在0~50 A电流范围内提高采样精度达到1%。设计产品已通过国标GB28184中4.7节表1中的基础实验及高低温试验要求。     

后摩尔时代雷达对抗装备集成化发展

国际半导体技术发展路线图(ITRS)显示,遵循持续摩尔(More Moore)发展的数字集成电路、片上系统(SoC)和遵循超越摩尔(More than Moore)发展的多样化功能集成电路、系统级封装(SiP)是实现更高价值系统的双引擎。构成电子系统的多种功能模块均迎来了半导体集成工艺时代。提出电子系统来到了泛集成、后摩尔时代的概念,随后讨论了雷达对抗装备集成化发展趋势及几种主要的射频电路集成技术,提示了未来发展的重点。     

基于UCOS-Ⅱ和LwIP的串口设备联网技术研究

文中介绍一种基于高性能处理器STM32的嵌入式串口设备联网技术的系统设计,该系统充分利用UCOS-Ⅱ实时操作系统和LwIP轻量型网络协议栈的特点,采用DM9161快速以太网PHY和STM32微处理器等组成,通过以太网实现上位机客户端到串口的数据信息的双向传输,完成串口数据的网络通信.最后对系统进行了测试,结果表明基于UCOS-Ⅱ和LwIP的串口设备联网系统设计是正确和高效的.     

可充电无线传感器网络动态拓扑问题研究

在可充电无线传感器网络中的能量补给设备兼任数据采集设备的情况下,提出了可充电无线传感器网络时变动态拓扑模型,并在此基础上根据最大化能量补给设备驻站时间比为目标提出了最优化问题。通过分析不同时刻不同传感器节点和无线能量补给/数据采集设备的工作情况及需要遵循的约束条件,得到与原问题具有等优性的多状态线性规划问题。求解该优化问题,获得可充电无线传感器网络动态拓扑下的周期动态路由和无线能量补给/数据采集设备的工作策略。与之前的研究成果相比,优化目标值均有20%以上的提升。     

计算机硬件设备常见故障原理及维修

计算机的应用在当前已极为普及,而在应用过程中计算机故障也极为常见,其中硬件设备方面出现的问题尤为突出。笔者就此分析了计算机硬件设备的常见故障原理,探讨了其维修策略,希望有所指导和帮助。     

如何巧妙探索电气自动化控制设备的可靠性

近年来随着自动化的发展,电气自动化被广泛应用。电气自动化的程度相对较高,但电气自动化控制设备的可靠性是电气自动化存在的最主要的问题,如何加强电气自动化控制设备的可靠性成为人们开始关注的焦点。电气自动化控制设备的可靠性直接关系到人们的生命安全,电气自动化的安全性必须要有一定的保障。安全可靠的自动化控制设备电气设备给人们的生产生活带来巨大的经济效益,而根据国家电控发展的实际情况来看,电气自动化控制设备的安全可靠性需要进一步加强。文章对进一步加强电气自动化控制设备的可靠性问题展开了研究和讨论。