喷雾热解法制备功能材料研究进展

综合评述了喷雾热解技术在超导陶瓷、介质材料、固体燃料电池电极、催化剂、磁性材料、人工骨材料以及气体传感器薄膜等领域的研究进展,并指出了进一步发展的方向。     

环氧聚酯美术型粉末涂料及其防腐性能试验研究

通过多年来的批量生产实践,阐述了环氧聚酯美术粉末涂料的组成及其对原材料的要求和在电子测量仪器表面装饰的应用;并介绍其涂覆层经人工加速试验耐盐雾试验和耐湿热试验的结果,以及在各种气候条件下,经一年的天然暴露试验结果。     

CCD摄像机在瞬变喷雾可视化中的应用

结合作者近年来在早稻田大学和上海交通大学的研究工作,介绍了高速CCD摄像机在柴油机喷雾测试中的应用。重点论述了利用红宝石激光器和CCD(电荷耦合器件)视频摄像机的特点实时采集瞬变燃油喷雾图像的技术,并讨论了其中的关键问题。     

动态散斑用于确定高斯光束曲率中心位置

本文通过推导高斯光束照明的毛玻璃产生的散斑的互相关函数,得出此光源的曲率中心经光学系统的成像面为激光动态散斑的纯沸腾面。由此给出确定高斯光束曲率中心位置的方法。     

Implementation and characterization of flash-based hardware security primitives for cryptographic key generation

Hardware security primitives, also known as physical unclonable functions (PUFs), perform innovative roles to extract the randomness unique to specific hardware. This paper proposes a novel hardware security primitive using a commercial off-the-shelf flash memory chip that is an intrinsic part of most commercial Internet of Things (IoT) devices. First, we define a hardware security source model to describe a hardware-based fixed random bit generator for use in security applications, such as cryptographic key generation. Then, we propose a hardware security primitive with flash memory by exploiting the variability of tunneling electrons in the floating gate. In accordance with the requirements for robustness against the environment, timing variations, and random errors, we developed an adaptive extraction algorithm for the flash PUF. Experimental results show that the proposed flash PUF successfully generates a fixed random response, where the uniqueness is 49.1%, steadiness is 3.8%, uniformity is 50.2%, and min-entropy per bit is 0.87. Thus, our approach can be applied to security applications with reliability and satisfy high-entropy requirements, such as cryptographic key generation for IoT devices.     

喷镀热解制备SnO2：F透明导电热反射膜

SnCl_4·5H_2O和SnF_2的水溶液经超声振荡雾化后喷射到高温平板玻璃衬底上热解形成掺氟二氧化锡(记作SnO_2∶F)透明导电热反射膜。喷镀时的衬底温度对膜的微观结构起决定作用。衬底温度300℃时形成非晶膜,高于400℃时形成多晶膜且结晶度随衬底温度升高而提高。结晶度高的多晶膜导电率达10~3Ω~(-1)cm~(-1),镀有多晶膜的玻璃对可见光(0.3～0.8μm)的透过率比未镀膜的玻璃仅减少10％左右,而红外(2～10μm)反射率比未镀膜的玻璃提高近4倍。膜的这种电学和光学特性与结晶程度有明显的对应性。     

Electrical properties of Cu4ZnSnS2/ZnS heterojunction prepared by ultrasonic spray pyrolysis

Cu₂ZnSnS₄ (CZTS)/ZnS heterojunctions have been prepared by a successive deposition of ZnS and CZTS thin films by ultrasonic spray pyrolysis technique on glass substrates. The cupric chloride concentration has been varied in the starting solution in order to investigate its influence on device properties. CZTS/ZnS heterojunctions were characterized by recording their current-voltage characteristics at different temperatures. The obtained results exhibit a good rectifying behavior of the realized heterojunction. Analysis of these results yields saturation current, series resistance and ideality factor determination. From the activation energy of saturation current we inferred that the thermal emission through the barrier height is the dominant mechanism of the reverse current rather than the defects contribution.     

基于SOC的PAGER控制芯片设计

文章讨论了PAGER控制器芯片（ZQD021）的系统设计，该控制器内部集成了FLASH，SRAM，POCSAG协议解码器和嵌入式MCU CORE。重点分析了芯片的可测性设计（DFT），内嵌FLASH设计，低功耗设计，其设计方法和思路对消费类和嵌入式控制芯片的设计有一定的借鉴意义。     

一种利用全国产化器件启动龙芯3A1000 的方法

针对产品国产化的要求,设计一种利用国产化器件启动CPU 的方法。详细分析LPC 总线,阐述存储器 配置,介绍利用国产FPGA 和国产flash 实现国外LPC 配置flash 的功能。结果表明：该方法能替代国外芯片的功能, 实现全国产化。