期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
可靠组播中基于FEC的随机化差错恢复算法 被引量:2
1
作者 张红波 张大方 杨金民 《计算机应用研究》 CSCD 北大核心 2007年第6期318-320,共3页
提出RRMF算法,用向前纠错和重传技术相结合的方式为网络提供可靠组播。FEC通过增加冗余信息的方式提高可靠性。当接收到的信息不足以恢复原始数据时,使用ARQ进行差错恢复。减少了重传发生的次数,从而降低了差错反馈信息和重传数据占用... 提出RRMF算法,用向前纠错和重传技术相结合的方式为网络提供可靠组播。FEC通过增加冗余信息的方式提高可靠性。当接收到的信息不足以恢复原始数据时,使用ARQ进行差错恢复。减少了重传发生的次数,从而降低了差错反馈信息和重传数据占用的带宽,适合在大规模交互中使用。 展开更多
关键词 可靠组播 随机化协议 自动重传 向前纠错
下载PDF
可靠组播中随机化错误恢复算法的改进
2
作者 张红波 张大方 杨金民 《科学技术与工程》 2006年第19期3118-3121,3130,共5页
通过考虑丢失率大或者有突发性数据丢失的网络,基于随机化可靠组播协议RRMP提出了改进的算法IRRM,对于连续丢失的消息不是每次请求恢复一个消息,而是放在同一个请求中进行恢复,从而减少请求次数,节省带宽。实验结果验证了设想的正确性。
关键词 可靠组播 随机化协议 基于树的组播协议
下载PDF
基于POF的网络窃听攻击移动目标防御方法 被引量:5
3
作者 马多贺 李琼 林东岱 《通信学报》 EI CSCD 北大核心 2018年第2期73-87,共15页
网络窃听攻击是网络通信安全的重大威胁,它具有隐蔽性和无干扰性的特点,很难通过传统的流量特征识别的被动防御方法检测到。而现有的路径加密和动态地址等方法只能混淆网络协议的部分字段,不能形成全面的防护。提出一种基于协议无感知转... 网络窃听攻击是网络通信安全的重大威胁,它具有隐蔽性和无干扰性的特点,很难通过传统的流量特征识别的被动防御方法检测到。而现有的路径加密和动态地址等方法只能混淆网络协议的部分字段,不能形成全面的防护。提出一种基于协议无感知转发(POF,protocol-oblivious forwarding)技术的移动目标防御(MTD,moving target defense)方法,通过私有协议分组随机化策略和动态路径欺骗分组随机丢弃策略,大大提高攻击者实施网络窃听的难度,保障网络通信过程的隐私性。通过实验验证和理论分析证明了该方法的有效性。 展开更多
关键词 移动目标防御 窃听攻击 协议随机化 网络空间欺骗 协议无感知转发
下载PDF
RFID安全和隐私技术
4
作者 柳杨才 朱卫国 《电脑编程技巧与维护》 2014年第16期126-128,共3页
近年来随着射频识别技术的不断研究和发展,RFID的安全性被提到一个非常重要的地位。讨论了RFID的安全性,介绍了RFID系统的原理,指出了RFID的安全问题,着重分析了RFID的密码保护协议。
关键词 RFID技术 安全协议 Hash协议 随机化Hash协议 HASH链 匿名ID 重加密
下载PDF
Comparison of the safety and efficacy of two types of drug-eluting balloons (RESTORE DEB and SeQuent Please) in the treatment of coronary in-stent restenosis: study protocol for a randomized controlled trial (RESTORE ISR China)
5
作者 Lei GAO Qin QIN +9 位作者 Shao-Liang CHEN Hui CHEN Le-Feng WANG Ze-Ning JIN Hui LI Jun ZHANG Jian-An WANG Yang ZHENG Guo-Sheng FU Yun-Dai CHEN 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2018年第2期117-122,共6页
1 Introduction In-stent restenosis (ISR), characterized by neointimal proliferation and/or neoatherosclerosis in the vessel of the stent, can cause a reduction in lumen diameter after stent implantation, which can d... 1 Introduction In-stent restenosis (ISR), characterized by neointimal proliferation and/or neoatherosclerosis in the vessel of the stent, can cause a reduction in lumen diameter after stent implantation, which can directly induce the recurrence of angina symptoms or an acute coronary syndrome in patients and is usually life-threatening. 展开更多
关键词 Drug-eluting balloons In-stent restenosis Percutaneous coronary interventions
下载PDF
Jinye Baidu granule for wind-warmth lung-heat disease(heat in the lung-wei): protocol for a randomized, double-blind, parallel, controlled trial
6
作者 Jiang Junjie Zhang Yin +6 位作者 Xie Yanming Li Yuan Sun Shuailing Zhang Yili Wang Shuo Zhu Yong Qi Wensheng 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2017年第5期621-628,共8页
OBJECTIVE: To observe the curative effect of Jinye Baidu granule in the treatment of fever and swollen and sore throat caused by wind-warmth lung-heat disease(heat in the lung-wei) to further identify the indications.... OBJECTIVE: To observe the curative effect of Jinye Baidu granule in the treatment of fever and swollen and sore throat caused by wind-warmth lung-heat disease(heat in the lung-wei) to further identify the indications.METHODS: This randomized, double-blind, parallel, controlled trial will include patients with acute upper respiratory infection and wind-warmth lung-heat disease(heat in the lung-wei). Patientswith serious bacterial infection(white blood cell count > 12 × 10~9, neutrophils > 80%) will be excluded. Patients will be divided into three categories(blocks) according to their condition: fever only, a swollen and sore throat, and combined fever plus a swollen and sore throat. Patients within each of the three blocks will be further divided into a treatment group and a control group via stratified blocked randomization. The treatment group will be treated with Jinye Baidu granule, and the control group will be treated with Fufang Shuanghua granule. The primary outcome measure will be body temperature recovery time for patients with fever, throat symptom score for patients with a swollen and sore throat, and body temperature recovery time and throat symptom score for patients with combined fever plus a swollen and sore throat. Routine blood testing, urine testing, liver function, kidney function and ECG data of all patients will be collected as safety indices before and after enrollment, and adverse events will be recorded during the whole trial course.CONCLUSION: This study protocol will include stratified block analysis according to patients' symptoms, and identify the accurate clinical indications of Jinye Baidu granule. It will also enable safety evaluation from laboratory indices and adverse events, which will provide reliable evidence for clinical treatment. 展开更多
关键词 Syndrome of wind heat invading lung and stomach Respiratory tract infections Randomized controlled trial Clinical protocols Jinye Baidu granule
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部