Superhydrophobic surface based on micro/nano structured ZnO nanosheets for high-efficiency anticorrosion

Journal of Solid State Electrochemistry - There are two key factors in the fabrication of superhydrophobic surfaces. One is to have the appropriate micro/nano structure, and the other is to reduce...     

Structural characterizations of protonated homodimers of amino acids: Revealed by infrared multiple photon dissociation (IRMPD) spectroscopy and theoretical calculations

Photon affinity can serve as a probe for predicting the structures of protonated homodimers of amino acids.     

Memristive hyperchaos secure communication based on sliding mode control

Nonlinear Dynamics - In order to enhance the chaotic degree of cellular neural network (CNN), the memristive characteristic is combined in CNN, and a five-dimensional memristive CNN hyperchaotic...     

Effects of Sericite Modified by Macromolecular Dispersant on the Thermal,Mechanical and Electrical Properties of the NR/SBR Composites

A new hydrosoluble macromolecular dispersant and modifier, poly(ethylene glycol)-maleic anhydride-acrylic acid (PEG-MA-AA) terpolymer was synthesized via ring-opening reaction and free radical polymerization. The chemical structure of the PEG-MA-AA terpolymer was confirmed by Fourier transform infrared (FTIR) spectra and nuclear magnetic resonance spectroscopy (NMR), and its average molecular weight was determined by gel permeation chromatography (GPC). Modified sericite (MSE) was synthesized from sericite (SE) by the surface modification with PEG-MA-AA. The NR/SBR/MSE composites were prepared via the blending of the modified sericite and NR/SBR rubber. The thermal, mechanical and electrical properties of the composites were investigated by TGA, tensile test machine and high-insulation resistance meter. The results showed that the thermal stability and the mechanical and electrical insulation properties of NR/SBR/MSE composites were improved significantly. SEM also revealed that modified sericite possessed good dispersibility.     

基于IP PBX技术的话务系统设计与实现

摘 要: 针对IP PBX的操作复杂问题,提出了一种简化IP PBX电话系统的设计方案。设计了便捷实现IP PBX的用户指定操作的话务系统。新系统采用了自定义协商接口,通过Telnet通信协议和IP PBX进行通信。并实现了对各类接收数据进行高效处理和解析。完成各类短长途话务接转控制。实现客房入住统计和话务免打扰等服务。此话务系统可应用于宾馆、宾馆等场所,提高工作效率和服务水平。此系统目前已在宾馆中应用,运行状况稳定,使用效果良好。简化了人工操作流程和复杂度,节约了业务时间,提高工作实效。     

The effect of Au nanoparticles on the strain-dependent electrical properties of CVD graphene

We conducted an experimental study of the effect of Au nanoparticles (NPs) on the strain-dependent electrical properties in chemical vapor deposition grown graphene. We used 5-nm thick Au NPs as an effective cover (and doping) layer for graphene, and found that Au NPs decrease electrical resistance by two orders of magnitude. In addition, the Au NPs suppress the effect of strain on resistance because the intrinsic topological cracks and grain boundaries in graphene are filled with Au nanoparticles. This method has a big potential to advance industrial production of large-area, high-quality electronic devices and graphene-based transparent electrodes.     

A mycophenolic acid derivative from the fungus Penicillium sp. SCSIO sof101

Abstract

Mycophenolic acid (MPA) is a group of metabolite derived from several species of Penicillium, which shows potent bioactivity. In this study, a new derivative of MPA compound named penicacid D (1), was isolated from the marine derived fungus Penicillium sp. SCSIO sof101, along with seven known compounds (2-8). Their structures were elucidated based on the HR-ESI-MS and NMR data. Moreover, the ¹H and ¹³C NMR data of compound 2 and the ¹³C NMR data of compound 3 are reported. Compounds 1, 4 and 6 exhibited weak activities against Escherichia coli (clinical isolation number 100385570) and Acinetobacter baumannii (clinical isolation number 100069).     

船舶轴系双通道轴功率与扭振应力测量分析软件研发

为了实现船舶双推进轴系轴功率及扭振应力的动态测量,开发设计了轴功率与扭振应力测量分析软件,描述了轴功率及扭振应力测量的基本原理及所需设备,测量软件通过对船舶推进轴系的扭矩和转速的实时采集和计算转换,实时计算出轴功率及扭振应力,并且能够实时显示和存储扭矩,转速,轴功率即扭振应力。同时根据测量圈数对扭振应力进行频域分析,通过数据回放功能能够选择指定测量文件进行回放观察。最后,实船测试表明,该系统测试精确度高,轴功率与扭振应力分析结果显示直观,满足了船舶双推进轴系轴功率与扭振应力分析的设计要求。     

Synthesis of Ni–B/diamond-Y2O3 binary nano-composite coatings and research on corrosion resistance and wear resistance of coatings with different pulse frequencies

Journal of Solid State Electrochemistry - In this article, Ni–B composite electrodeposition was prepared by nanodiamond and Y2O3 nanoparticles. Due to the synergistic strengthening effect of...