摘要：Mesa width （WM） is a key design parameter for SiC super junction （SJ） Schottky diodes （SBD） fabricated by the trench-etching-and-sidewall-implant method. This paper carries out a comprehensive investigation on how the mesa width design determines the device electrical performances and how it affects the degree of performance degradation induced by process variations. It is found that structures designed with narrower mesa widths can tolerant substantially larger charge imbalance for a given BV target, but have poor specific on-resistances. On the contrary, structures with wider mesa widths have superior on-state performances but their breakdown voltages are more sensitive to p-type doping variation. Medium WM structures （-2 p.m） exhibit stronger robustness against the process variation resulting from SiC deep trench etching. Devices with 2-p.m mesa width were fabricated and electrically characterized. The fabricated SiC SJ SBDs have achieved a breakdown voltage of 1350 V with a specific on-resistance as low as 0.98 mΩ***2. The estimated specific drift on- resistance by subtracting substrate resistance is well below the theoretical one-dimensional unipolar limit of SiC material. The robustness of the voltage blocking capability against trench dimension variations has also been experimentally verified for the proposed SiC SJ SBD devices.

摘要：设计了以“菊苣酸体外抑制氧化应激的药效学评价”为主题的细胞生物学开放性综合实验。以LPS诱导巨噬细胞RAW264.7构建炎症模型,通过CCK8法检测菊苣酸的细胞毒性并确定有效剂量;以ROS指示剂DCFH-DA染色为主线,结合全波长荧光酶标仪、荧光显微镜以及流式细胞术,并辅以DHE染色进行荧光显微镜观察评价菊苣酸抑制氧化应激的能力。该课程涵盖多学科实验技术,将基础实验与创新实验有机融合,在巩固基础知识的同时深化理解重点实验技术相关知识。为学生提供了一定的创新空间。

摘要：为更好地完成营配调贯通数据采录工作,研究供电企业营销现场作业可视化数据采集方法。根据建立的可视化数据采录标准,设计可视化数据采录界面,并在采录界面采用模糊聚类法计算数据样本的隶属度,调整纠偏局部数据,区分数据源;将各系统中的共性数据进行比对,计算各设备数据一致率,判断所有可视化数据在各系统中是否符合一致性要求,从而完成可视化数据采集。实验论证分析结果表明:该可视化数据采集结果能为台区线损波动异常问题分析提供可靠依据,多设备数据一致率为100%,具有较好的数据采集质量。

摘要：针对传统家居空调设备温湿控制智能化程度低的问题,开发了基于ZigBee的智能家居温湿度控制系统,从移动控制器和温湿度调节设备控制终端两方面介绍了系统的硬件设计,满足了舒适度的智能控制需要,节约了能源的消耗。

摘要：目前,用于地下电缆射频识别(radio frequency identification,RFID)探测定位的传统紧密型线圈天线的性能不足严重制约了其探测定位距离的提高。提出了一种新型高场强分散型RFID线圈天线结构,在推导天线相关电气参数的基础上,以天线的磁场强度为目标函数,以其品质因数固定为约束条件,采用粒子群算法对天线的匝数和相邻两匝之间的匝间距进行了优化。最后,搭建了实验测试平台,测试结果表明,与传统紧密型RFID线圈天线相比,所设计的分散型RFID线圈天线将读取距离提高了33.3%,同时明显增强了相同距离下的标签返回信号强度(received signal strength indication,RSSI),有助于提高基于RSSI的地下RFID定位方法的精度,这为地下电缆RFID探测定位的应用提供重要参考。

摘要：Internal reformation of low steam methane fuel is highly beneficial for improving the energy efficiency and reducing the system complexity and cost of solid oxide fuel cells(SOFCs).However,anode coking for the Ni-based anode should be prevented before the technology becomes a reality.A multi-physics fully coupled model is employed to simulate the operations of SOFCs fueled by low steam *** multi-physics model produces I-V relations that are in excellent agreement with the experimental *** multi-physics model and the experimental non-coking current density deduced kinetic carbon activity criterion are used to examine the effect of operating parameters and the anode diffusion barrier layer on the propensity of carbon *** interplays among the fuel utilization ratio,current generation,thickness of the barrier layer and the cell operating voltage are *** is demonstrated that a barrier layer of 400μm thickness is an optimal and safe anode design to achieve high power density and non-coking *** anode structure design can be very useful for the development of high efficiency and low cost SOFC technology.

摘要：Based on the antiplatelet aggregation mechanism and the bioisosterism principle of the reference drug picotamide, thirteen novel derivatives of arylamide and arylsulfonamide were designed and prepared. The biological activities of these derivatives were investigated. The chemical structures of the target compounds were confirmed by ^1H NMR and IR. The in vitro activities of antiplatelet aggregation of the thirteen target compounds were assessed by Bore＇s method. Compounds 2b and 8h have significant antiplatelet aggregation activities, which are superior to the corresponding activity of Picotamide.

摘要：To reduce the difficulty of material filling into the top region of tooth in hot precision forging of gears using the alternative die designs, relief-cavity designs in different sizes were performed on the top of die tooth. The influences of the conventional process and relief-cavity designs on corner filling, workpiece stress, die stress, forming load and material utilization were examined. Finite element simulation for tooth forming, die stress and forming load using the four designs was performed. The material utilization was further considered, and the optimal design was determined. The tooth form and forming load in forging trials ensured the validity of FE simulation. Tooth accuracy was inspected by video measuring machine(VMM), which shows the hot forged accuracy achieves the level of rough machining of gear teeth. The effects of friction on mode of metal flow and strain distribution were also discussed.

摘要：博物馆收藏着人类创造的物质文明,当中透过研究发掘物质遗存的文化精神及历史意义,籍着展示让公众走进历史文明的轨迹。博物馆不仅肩负起教育及传播人类文明的使命,还成为了连接历史与人类的文化桥梁。对于博物馆建筑来说,它们的主要活动就是展示陈列室中的展品,为了能够吸引人们,愉快的视觉环境尤为重要,因此,必须将照明设计视为一项重要的设计问题,因为光不仅能展示展品,还能将展品的魅力充分展现在观众面前。陈列室光环境的布置好坏直接关系着博物馆的使用效果。因此,创造良好的光环境是博物馆室内设计的重要内容。对博物馆采光来说,最关键的要求是光谱分布。在这方面,自然光被认为是最好的选择,因为其颜色特性极为理想,但天然光具有瞬时性和周期波动性,很难控制光束的强度、形状、尺度以及其方向性,所以我们在使用天然光的同时,还必须辅助以适当的人工照明。本文探讨了博物馆室内展示空间自然采光和人工照明的运用情况,并探讨用其中一种光源照明所牵涉的利弊及设计难点,经过分析,最后得到属于自己的结论。

摘要：针对超磁致伸缩伺服阀的结构特点,研究了其参数设计规律,建立了超磁致伸缩伺服阀集中参数数学模型和动态仿真模型。通过仿真研究得出了该伺服阀主要设计参数对其动态特性的影响规律及其稳定性特点,通过对主要设计参数的优化表明,在-8dB幅值稳定裕量下超磁致伸缩伺服阀幅频宽可以达到近700Hz。