FX2N PLC在立式车床控制系统中的应用

针对老式继电逻辑系统接线复杂,不便维护,接点寿命低的问题,采用PLC对电气系统进行改造。设计了硬件和软件系统。证明改造后的电气控制系统简化了控制电路,降低了生产维护费用。     

浅谈住宅电气设计

随着社会经济迅速发展，居民生活水平日益提高，各种家用电器进入了千家万户。居民对电的需求也日益增长。结合本地区的实际情况和笔者的实践经验。分别阐述了室内室外住宅电气设计的思路和体会。     

Effect of La and Co-doping on microstructure and electrical properties of Bi FeO_3 thin films

Adding both La3＋and Co3＋was used to tune the microstructure and electrical properties of Bi Fe O3（BFO） thin films, and Bi1-xLaxFe0.90Co0.10O3 thin films were grown on the Sr Ru O3-buffered Pt-coated silicon substrates by a radio frequency sputtering. A polycrystalline structure with（110） orientation was shown in thin films, and their resistivity dramatically increases as the La3＋content increases. Their dielectric constant increases,and dielectric loss decreases with increasing La3＋content.In addition, their ferroelectric and fatigue properties were enhanced with rising La3＋content. The thin films with x = 0.03 have optimum electrical properties（e.g., remanent polarization 2Pr＊ 175.6 l C/cm2, coercive field2Ec＊ 699.5 k V/mm, dielectric constant er＊ 257 and tan d ＊ 0.038）, together with a good fatigue behavior. The impendence analysis of the films was conducted to identify the defects type during conductivity, and both hopping electrons and single-charged oxygen vacancies are mainly responsible for the conduction of grain and grain boundaries regardless of La3＋content. As a result, the doping with both La3＋and Co3＋benefits the improvement in the electrical properties of BFO thin films.     

对汽车电子电器与控制系统课程实验教改的思考

在汽车电子电器与控制系统课程（下简称为汽车电子电器）的教学过程中，结合实验教学中所存在的问题，介绍了对研究性实验教学改革中所做的一些探索，阐述了下一步教改的方向与内容。     

Spintronic materials and devices based on antiferromagnetic metals

In this paper, we review our recent experimental developments on antiferromagnet (AFM) spintronics mainly comprising Mn-based noncollinear AFM metals. IrMn-based tunnel junctions and Hall devices have been investigated to explore the manipulation of AFM moments by magnetic fields, ferromagnetic materials and electric fields. Room-temperature tunneling anisotropic magnetoresistance based on IrMn as well as FeMn has been successfully achieved, and electrical control of the AFM exchange spring is realized by adopting ionic liquid. In addition, promising spin-orbit effects in AFM as well as spin transfer via AFM spin waves reported by different groups have also been reviewed, indicating that the AFM can serve as an efficient spin current source. To explore the crucial role of AFM acting as efficient generators, transmitters, and detectors of spin currents is an emerging topic in the field of magnetism today. AFM metals are now ready to join the rapidly developing fields of basic and applied spintronics, enriching this area of solid-state physics and microelectronics.     

三侧向测井电阻率反演

本文针对胜利油田深三侧向测井仪给出了一种由视电阻率反求地层电阻率的快速迭代算法。该算法可推广应用到任何聚焦测井方法中。试算结果表明,计算精度和速度可达到实际应用要求,是一种行之有效的方法。     

利用电力工程进行现场教学

“利用电力工程进行现场教学”是《电工学及电气设备》课教学的一种辅助教学方式。本文对采用这种教学方式的必要性；以及它的产生，发展过程和效果进行了简要的阐述，并附有教学指导书可供参考。     

电工技术实践与教学探讨

针对《电工与电子技术》课程的特点,以提高教学质量和培养学生学习兴趣及能力为目的,在教学内容和方法等方面进行了深入探讨。     

Influence of Ga-doping on the thermoelectric properties of Bi(2−x)GaxTe2.7Se0.3 alloy

Bi(2-x)GaxTe2.7Se0.3(x=0, 0.04, 0.08, 0.12) alloys were fabricated by vacuum melting and hot pressing technique. The structure of the samples was evaluated by means of X-ray diffraction. The peak shift toward higher angle can be observed by Ga-doping. The effects of Ga substitution for Bi on the electrical and thermal transport properties were investigated in the temperature range of 300–500 K. The power factor values of the Ga-doped samples are obviously improved in the temperature range of 300–440 K. Among all the samples, the Bi(2-x)GaxTe2.7Se0.3(x=0.04) sample showed the lowest thermal conductivity near room temperature and the maximum ZT value reached 0.82 at 400 K.     

160KA铝电解槽电、热解析及仿真试验

本文提出了一个铝电解槽阴极分区电、热解析模型及其仿真程序,并通过现场实测对该程序进行了初步验证.利用此程序对160kA中间下料、预焙槽的阴极部分进行了仿真试验.找出了能改善槽膛内形并能降低能耗的改良槽衬结构方案.此种仿真试验法能有效地提高铝电解槽设计的技术水平.