82B盘条拉拔横裂纹断裂分析

采用金相显微镜、扫描电镜、显微硬度计等对 82B盘条钢拉拔横裂纹断裂试样进行了分析。结果表明：拉拔过程中产生白亮形变马氏体是盘条出现断裂的原因。对产生形变马氏体原因进行讨论，并提出了避免形变马氏体产生的措施。     

Structure,electrical, optical and magnetoelectric properties of magnetron sputtered nanocrystalline NiFe/BaTiO3 thin films

BaTiO₃ (BTO) and NiFe films grown on SrTiO₃ (STO), Nb:SrTiO₃ (NSTO), and ITO-glass substrates were prepared by radio-frequency (RF) and direct-current (DC) magnetron sputtering, respectively. The microstructure, ferroelectricity, leakage current, magnetoelectric (ME) coupling, ultraviolet–visible light spectrum, optical band gap, ellipsometry spectrum and surface morphology of the composite film are characterized by XRD, ferroelectric analyzer, ME coupling test system, U-4100, Horiba Smart SE and AFM. In addition, the stress, strain and piezoelectric voltage of the magnetoelectric composite film under the action of DC and AC magnetic fields are simulated by COMSOL multiphysics software. The experimental results show that the prepared composite film is polycrystalline, the surface roughness of the film is better, and the particles are uniform. The magnetoelectric coupling voltage gradually increases with the increase of the value of the DC magnetic field and the frequency of the AC magnetic field, and it has a larger absorption (about 0.3) at 340 nm. In addition, the simulation results also show the relationship between the coupling voltage V_ME and the applied magnetic field H.     

基于AT91RM9200的CAN智能节点设计

在此提出一种基于AT91RM9200处理器,并以MCP2510为CAN控制器的智能节点设计方案。首先描述CAN智能节点硬件的设计原理并给出了选用的主要芯片的型号;接着详细描述CAN智能节点软件设计流程;最后说明CAN智能节点软、硬件的调试方法。目前已完成CAN智能节点硬件和软件的设计及调试,并成功移植到VxWorks5．5操作系统上运行,证明了该设计方案正确可行。     

基于海坨风电项目的国产风电机组选型实践与探索

如何依据风场特征完成风电机组选型,确保运行维护的便利,同时满足风电开发商的收益要求,成为从业人员的重大课题。本文基于吉林大安海坨49.5MW风电项目的选型实践,对国内三家风电机组厂商的82/1500机组技术参数和性能指标进行比较,通过调研和评估其在实际风电场的表现,探索Ⅲ类风场风电机组选型的应对方案。     

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 综述了SWRH82B盘条常见的折叠、结疤、微裂纹、划痕等表面缺陷和冶金缺陷,分析了产生的原因并提出预防措施;采用SEM、OM分析了中心网状渗碳体、中心区域马氏体、中心缩孔等内部缺陷的组织形貌,分析产生的原因和危害,并根据生产实际要求提出相应的解决方案和措施。     

光传感器ISL29004在智能照明控制系统中的应用

针对智能照明控制系统中照度检测的问题,提出一种基于ISL29004的多路照度检测方案.介绍一种采用该方案的智能照明控制设备,该设备以单片机P87LPC768为控制核心,采用具有I2C总线接口的ISL29004进行照度检测,使用准双向I2C总线缓冲器P82B96对I2C总线进行驱动扩展,在简化系统设计的同时实现了多路照度检测以及自动照明控制.     

地域通信网单链路干扰研究

地域通信网是现代军事通信中一种重要手段,链路是通信网络的重要组成部分。不同通信体制下对链路干扰的效果是不同的,误码率是衡量通信质量的重要参数,干信比是对干扰效能的衡量指标,而链路阻塞率则是对网络服务质量进行描述的具体参数,研究不同通信体制下3种变量之间的关系对地域通信网干扰研究具有十分重要的意义。文章正是在地域通信网单链路的基础上,从链路模型和通信干扰效果两个方面出发,研究了链路阻塞率、干信比和误码率之间的关系,并进行了计算机仿真。     

Effect of induced damage on hydrogen isotope retention of F82H with impurity layer

The effects of induced damage on hydrogen isotope retention in F82H with or without thermal oxidation were investigated using thermal desorption spectroscopy. To induce damage and modify the surface, glow discharge pre-irradiated Ar⁺ ions was examined. In non-oxidized samples, the amount of desorbed deuterium increased with Ar⁺ ion fluence. Oxygen depletion in the surface layer of non-oxidized samples from the Ar⁺ ion irradiation, which resulted in bulk diffusion of deuterium, is responsible for the increase in deuterium retention. A comparison between non-oxidized and oxidized samples clearly indicated that the surface oxide layer greatly influenced deuterium retention/desorption behaviors of F82H.     

Solubility of Disperse Red 82 and modified Disperse Yellow 119 in supercritical carbon dioxide or nitrous oxide with ethanol as a cosolvent

Ethanol was used as a cosolvent to enhance the solubility of disperse dyestuffs in supercritical fluids. In the presence of ethanol, from (1 to 5) mol%, the gas–solid equilibrium data of the Disperse Red 82 and modified Disperse Yellow 119 in supercritical carbon dioxide or nitrous oxide have been measured at temperatures from (353.2 to 393.2) K and pressures from (15.0 to 30.0) MPa. The experimental results show that the solubility increases substantially, up to (9 to 25)-fold, by adding 5 mol% of ethanol to the supercritical fluids. In the presence of cosolvent ethanol, the solubility enhancements in nitrous oxide system are much greater than that in carbon dioxide system for modified Disperse Yellow 119 at the same temperature and pressure. The solubility data were correlated with the Chrastil and the Méndez-Santiago and Teja models. The Méndez-Santiago and Teja model yields slightly better results than Chrastil model.     

一种基于单片机及CPLD测试平台的设计与实现

文章介绍可编程计数器/定时器M82C54和高速异步双端口RAM IDT7130的性能特性.利用单片机80C196KB及上述芯片设计并实现测试平台,给出测试平台的接口电路,并阐述了它的实现原理.