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基于RC4和椭圆加密的无线传感器网络密钥分配方法
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作者 张涛 方旺盛 陈康 《江西理工大学学报》 CAS 2010年第1期62-65,共4页
在分析3类典型的无线传感器网络密钥管理方案存在的安全性和连通性问题的基础上,结合RC4密码体制和Menezes-vanstone椭圆曲线密码体制,提出了一种新的密钥预分配方法.采用RC4密码体制进行数据的加密与解密,Menezes-vanstone椭圆曲线密... 在分析3类典型的无线传感器网络密钥管理方案存在的安全性和连通性问题的基础上,结合RC4密码体制和Menezes-vanstone椭圆曲线密码体制,提出了一种新的密钥预分配方法.采用RC4密码体制进行数据的加密与解密,Menezes-vanstone椭圆曲线密码体制进行密钥的传递.与随机密钥预分配方法相比,本方法在空间复杂度,连通性和安全性等方面均有明显优势.利用计算仿真进行实验,结果表明,本方法降低了网络存储开销,提高了安全性,并使连通性达到最优. 展开更多
关键词 menezes—vanstone RC4密码体制 无线传感器网络
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Acute Hemorrhagic Fever: Clinical, Epidemiological and Laboratory Aspects in São Toméand Príncipe
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作者 Eula Carvalho Didiena Vilhete +7 位作者 Clara Assunção Ana Silva Jessica Vicente Ana Cristina Cleiser Vagente Francelina Costa Celdidy Monteiro Bakissi Pina 《Advances in Infectious Diseases》 CAS 2022年第4期721-744,共24页
Background: In the last 6 months, cases of acute hemorrhagic fever (AHF) have been recorded in Sao Tome and Principe (STP). Objective: To identify the clinical, epidemiological and laboratory parameters associated wit... Background: In the last 6 months, cases of acute hemorrhagic fever (AHF) have been recorded in Sao Tome and Principe (STP). Objective: To identify the clinical, epidemiological and laboratory parameters associated with AHF cases found in patients hospitalized in STP. Methods: Descriptive and quantitative analysis of AHF cases hospitalized in STP in the period December 2021 to May 19, 2022 through the variables: demographic data;clinical data;laboratory data and clinical outcome. Results: Analyzed 18 of 22 AHF cases, 50% of them male, mean age 33.7 years, 85.7% residing in the 2 largest districts of the country, 66.7% rural workers, administrative near maritime areas, sailors and domestics. 66.7% were healthy individuals. ≥50% had a fever, asthenia/weakness, myalgia, headache, lethargy, nausea, vomiting, and diarrhea. 22.2% to 33.3% had retro-orbital pain, abdominal pain, decreased consciousness, dyspnea/hypoxia, and cough. In a smaller register (5.6% - 11.1%), exanthema, convulsion, arthralgia, low back pain, chills, and chest pain. Bleeding from the digestive tract was found in 72.2%, followed by vaginal (33.3%), urethral (27.8%), nasal (22.2%), and oral (16.7%). 50% had laboratory confirmation for dengue, and another 50% with suspected clinical diagnosis without laboratory confirmation of the etiologic agent. Despite hemorrhage, 66.7% of confirmed cases were hemodynamically non-severe, and 88.9% of suspected cases were severe. Coinfection with malaria is evidenced in 11.1% of cases. 72.2% recovered and 27.8% died (deaths in 55.5% of suspected cases). Case deaths were male (100%), resident foreigners (40%), tool store employees, sailors and students, healthy (80%), and residing in the largest district in the country (60%). All deaths were hospitalized in serious condition, 80% were hospitalized for hemorrhage and shock, with bleeding arising between day 4 - 5 of illness in 60% and hospitalization on day 5 of illness. 60% died within ≤24 hours of hospitalization. 80% died from shock and multi-organ dysfunction and 20% from respiratory failure. Deaths had thrombocytopenia (100%), renal dysfunction (100%) and significantly increased transaminases (100%), anemia (75%) and leukocytosis (66.7%). 20% had a radiological change of pulmonary infiltrates. Conclusion: Our data reveal the complexity of the pathogens causing AHF and suggest the possible presence of other human pathogens usually unknown in the Santomean geographical territory. 展开更多
关键词 Acute Hemorrhagic Fever Viral Hemorrhagic Fever DENGUE São Tomé and Príncipe HOSPITALIZATION Epidemic Dr. Ayres de menezes Hospital
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