Puff-by-puff Transfer Ratios of Some Added Flavors in Cigarettes

[Objective] The aim was to observe the puff-by-puff transfer ratios of some flavors in cigarettes.[Method] Based on national standards,the puff-by-puff transfer...     

基于实时仿真平台的DSP技术研究

在实时仿真技术为电力电子技术研究的重要课题之一的背景下,以DSP作为控制器,FPGA为仿真器实现目标实时仿真平台。针对DSP传统和模型化两种开发方式,提出基于Matlab/Simulink和Embedded Coder的控制器算法开发方法。在实时仿真平台上,设计并实现两电平三相逆变电路、三电平三相逆变电路、单相逆变电压瞬时值反馈电路的实时仿真。根据平台仿真结果可知,模型化开发方式可以缩短控制器算法开发周期、提高开发效率、降低开发风险。     

人民币跨境支付系统区域接入中心研究与设计

文章在人民币国际化的背景下,首先,分析了人民币跨境支付系统在支持区域经济金融发展中存在的不足;其次,探索设立人民币跨境支付系统区域接入中心的必要性;接着,研究区域接入中心实现方式和系统框架;最后,分类别设计不同区域接入中心功能模块和业务处理流程.     

基于人工智能的故障监测和诊断系统的研究

随着现代科学技术的进步与发展,设备结构越来越复杂,自动化程度越来越高.随之而来的问题是,一旦关键设备发生故障,不仅会造成巨大的经济损失,而且可能危及人身安全,产生重大的社会影响.机电设备故障诊断技术研究的是设备在运行过程中伴随故障而必然产生的压力、噪声、振动等的变化,从而能及时诊断出来,正确地加以维修,以减少维修时间,提高维修质量,节约维修费用.而人工智能技术的发展,为设备故障诊断的智能化提供了可靠性,使原来以数值计算和信号处理为核心的诊断过程被以知识处理和知识推理为核心的诊断过程所代替.     

Preparation of two-dimensional graphite oxide modified chlorinated polyethylene rubber composites

<正>Herein,a two-dimentional graphite oxide (GO) modified chlorinated polyethylene rubber(CM) was utilized to prepare GO/CM composite. The vulcanization system which is suitable for this composite was     

Test particle simulation on the ion and electron zebra stripes and their time evolution in inner radiation belt

During February 15–16, 2014, the energetic electron spectrogram for four successive inner radiation belt crossing show clearly the electron zebra structures and their time evolution which last for about 17 h. Unfortunately, the time of flight(TOF) in RBSPICE measurement is turned off below 3 RE, and the ion measurement is contaminated by electrons. Thus in this study we studied the differences between the ion and electron zebra stripe structures and their time evolution using simple theory and test particle simulation, combining the electron measurement from RBSIPICE onboard Van Allen Probes. Theoretical analysis predicts that the ion zebra stripe structures should lie at a higher energy range than the corresponding electron zebra stripe structures due to that the directions of gradient B drift and corotation E×B drift are the same for electrons while opposite for ions. Test particle simulation with the dipole magnetic field and Volland-Stern electric field model have shown that the ion and electron zebra stripe structures could be produced by the convection electric field penetrating into the inner magnetosphere in this event, with their time evolution determined by total drift velocity that are different for ions and electrons. The predicted differences between the ion and electron zebra stripe structures are partially verified through observation. The ion zebra stripe structures could have potential influence to the ring current.     

一种动臂式塔机防冒顶限位保护装置

动臂式塔机常采用重锤限位或DXZ型多功能限位作为解决吊钩防冒顶的措施，由于重锤限位不方便维护，而DXZ型限位精度差，通过对动臂式塔机吊钩冒顶的原因进行分析，介绍了一种电气限位的实现方法。     

集群无线移动通信系统在电力系统应急状态下的应用

文章讨论了800 MHz集群(模拟)移动通信网在武汉供电公司应急通信专网中的应用,以及800 MHz集群(数字)移动通信的特点,认为800MHz集群(数字)移动通信技术更适宜建设新型电力系统应急通信专网.     

基于Fluent的空气射流切削式反循环钻头参数优化

针对黄土地层,提出利用空气代替钻井液的反循环气体喷射技术。但现有技术对反循环气体喷射钻头切削土体的能力没有具体优化讨论。利用fluent软件,优化反循环喷射钻头结构参数,对不同底喷孔直径、底喷孔数量、底喷孔扩大段直径、底喷孔扩大段数量、喷射孔数量5个结构参数进行模拟分析。分析结果表明,在进风流量一定的情况下,增加底喷孔的数量或增大底喷孔的直径会削弱钻头的空气射流切削能力和反循环能力。底喷孔直径为3 mm,底喷孔个数为2个,底喷孔扩大段直径为8 mm,底喷孔扩大段长度为5 mm,内喷孔数量为5个时,反循环喷射钻头喷射能力和反循环能力最优。     

土木工程本科实验教学创新平台建设

东南大学土木工程实验中心2008年底获批成为国家级土建类实验教学示范中心,文章介绍了东南大学土木工程实验教学中心在实验教学体系建设、实验教学方法及手段等方面的建设经验和所取得的成效,探讨了土木工程本科实验教学创新平台建设的发展方向。