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Search Results: 1 - 10 of 72623 matches for " XU YE-PING "
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Efficient Remote Attestation Mechanism with Privacy Protection

XU Zi-Yao,HE Ye-Ping,DENG Ling-Li,

软件学报 , 2011,
Abstract: 基于Merkle哈希树提出了一种效率高、方式灵活并能保护平台隐私的远程验证机制.针对特定的目标应用场景,分析IMA(integrity measurement architecture)体系架构的不足,详细描述基于Merkle哈希树的远程验证机制的体系架构和度量验证过程,阐述新机制对现有TPM(trusted platform module)的功能增强即TPM_HashTree命令的功能及伪代码,并分析讨论新机制的优点.
Clark-Wilson Modeling of Secure ARP

CHEN Xiao-Yan,HE Ye-Ping,XU Zi-Yao,DENG Ling-Li,

计算机科学 , 2008,
Abstract: Vulnerabilities in the ARP protocol became a threat to TCP/IP security.Countermeasures to these vulnerabilities based on Symmetric-Key Cryptography or Asymmetric-Key Cryptography are proposed recently.In the present paper,the principle of ARP attacks is analyzed,and the most popular secure ARP protocols are discussed.Clark-Wilson commercial model is introduced to analyze the integrity of ARP.While applying Clark-Wilson commercial model to the ARP integrity policy,all of the secure protocols failed to pass the rules of Clark-Wilson model.With the classical scenes of Clark-Wilson model,corresponding attack scenes are presented.
Suppression of Superconductivity by Twin Boundaries in FeSe
Can-Li Song,Yi-Lin Wang,Ye-Ping Jiang,Lili Wang,Ke He,Xi Chen,Jennifer E. Hoffman,Xu-Cun Ma,Qi-Kun Xue
Physics , 2012, DOI: 10.1103/PhysRevLett.109.137004
Abstract: Low-temperature scanning tunneling microscopy and spectroscopy are employed to investigate twin boundaries in stoichiometric FeSe films grown by molecular beam epitaxy. Twin boundaries can be unambiguously identified by imaging the 90{\deg} change in the orientation of local electronic dimers from Fe site impurities on either side. Twin boundaries run at approximately 45{\deg} to the Fe-Fe bond directions, and noticeably suppress the superconducting gap, in contrast with the recent experimental and theoretical findings in other iron pnictides. Furthermore, vortices appear to accumulate on twin boundaries, consistent with the degraded superconductivity there. The variation in superconductivity is likely caused by the increased Se height in the vicinity of twin boundaries, providing the first local evidence for the importance of this height to the mechanism of superconductivity.
Imaging the Electron-Boson Coupling in Superconducting FeSe
Can-Li Song,Yi-Lin Wang,Ye-Ping Jiang,Zhi Li,Lili Wang,Ke He,Xi Chen,Jennifer E Hoffman,Xu-Cun Ma,Qi-Kun Xue
Physics , 2013, DOI: 10.1103/PhysRevLett.112.057002
Abstract: Scanning tunneling spectroscopy has been used to reveal signatures of a bosonic mode in the local quasiparticle density of states of superconducting FeSe films. The mode appears below Tc as a 'dip-hump' feature at energy \Omega ~ 4.7 kBTc beyond the superconducting gap \Delta. Spectra on strained regions of the FeSe films reveal simultaneous decreases in \Delta and \Omega. This contrasts with all previous reports on other high-Tc superconductors, where \Delta locally anti-correlates with \Omega. A local strong coupling model is found to reconcile the discrepancy well, and to provide a unified picture of the electron-boson coupling in unconventional superconductors.
The Associations of Uric Acid, Cardiovascular and All-Cause Mortality in Peritoneal Dialysis Patients
Jie Dong, Qing-Feng Han, Tong-Ying Zhu, Ye-Ping Ren, Jiang-Hua Chen, Hui-Ping Zhao, Meng-Hua Chen, Rong Xu, Yue Wang, Chuan-Ming Hao, Rui Zhang, Xiao-Hui Zhang, Mei Wang, Na Tian, Hai-Yan Wang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0082342
Abstract: Aims To investigate whether uric acid (UA) is an independent predictor of cardiovascular (CV) and all-cause mortality in peritoneal dialysis (PD) patients after controlling for recognized CV risk factors. Methods A total of 2264 patients on chronic PD were collected from seven centers affiliated with the Socioeconomic Status on the Outcome of Peritoneal Dialysis (SSOP) Study. All demographic and laboratory data were recorded at baseline. Multivariate Cox regression was used to calculate the hazard ratio (HR) of CV and all-cause mortality with adjustments for recognized traditional and uremia-related CV factors. Results There were no significant differences in baseline characteristics between patients with (n = 2193) and without (n = 71) UA measured. Each 1 mg/dL of increase in UA was associated with higher all-cause mortality with 1.05(1.00~1.10) of HR and higher CV mortality with 1.12 (1.05~1.20) of HR after adjusting for age, gender and center size. The highest gender-specific tertile of UA predicted higher all-cause mortality with 1.23(1.00~1.52) of HR and higher CV mortality with 1.69 (1.21~2.38) of HR after adjusting for age, gender and center size. The predictive value of UA was stronger in patients younger than 65 years without CV disease or diabetes at baseline. The prognostic value of UA as both continuous and categorical variable weakened or disappeared after further adjusted for uremia-related and traditional CV risk factors. Conclusions The prognostic value of UA in CV and all-cause mortality was weak in PD patients generally, which was confounded by uremia-related and traditional CV risk factors.
Impact of Individual and Environmental Socioeconomic Status on Peritoneal Dialysis Outcomes: A Retrospective Multicenter Cohort Study
Rong Xu, Qing-Feng Han, Tong-Ying Zhu, Ye-Ping Ren, Jiang-Hua Chen, Hui-Ping Zhao, Meng-Hua Chen, Jie Dong, Yue Wang, Chuan-Ming Hao, Rui Zhang, Xiao-Hui Zhang, Mei Wang, Na Tian, Hai-Yan Wang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0050766
Abstract: Objectives We aimed to explore the impacts of individual and environmental socioeconomic status (SES) on the outcome of peritoneal dialysis (PD) in regions with significant SES disparity, through a retrospective multicenter cohort in China. Methods Overall, 2,171 incident patients from seven PD centers were included. Individual SES was evaluated from yearly household income per person and education level. Environmental SES was represented by regional gross domestic product (GDP) per capita and medical resources. Undeveloped regions were defined as those with regional GDP lower than the median. All-cause and cardiovascular death and initial peritonitis were recorded as outcome events. Results Poorer PD patients or those who lived in undeveloped areas were younger and less-educated and bore a heavier burden of medical expenses. They had lower hemoglobin and serum albumin at baseline. Low income independently predicted the highest risks for all-cause or cardiovascular death and initial peritonitis compared with medium and high income. The interaction effect between individual education and regional GDP was determined. In undeveloped regions, patients with an elementary school education or lower were at significantly higher risk for all-cause death but not cardiovascular death or initial peritonitis compared with those who attended high school or had a higher diploma. Regional GDP was not associated with any outcome events. Conclusion Low personal income independently influenced all-cause and cardiovascular death, and initial peritonitis in PD patients. Education level predicted all-cause death only for patients in undeveloped regions. For PD patients in these high risk situations, integrated care before dialysis and well-constructed PD training programs might be helpful.
CF自由基二光子共振增强多光子电离研究:5p Rydberg态观测与分析

,张 群,束继年,徐业平,宋钦华,陈从香,俞书勤,马兴孝

物理学报 , 1999,
Abstract: 报道260—360nm波长范围内CF自由基(2+1)共振增强多光子电离(REMPI)激发谱的研究-CF自由基通过Ar/CF4,Ar/CF2Cl2或Ar/CF3COOH混合气体的直流脉冲放电产生-在260—295nm波长范围内,观测到一个新的高Rydbery态振动序列,其带源位于295-22nm(2hν=67746cm-1),分析表明,该振动序列来源于5p Rydberg态的二光子共振激发,测得的振
Research about Grid Computing Authorization

WU Yu-yi,HE Ye-ping,

计算机应用研究 , 2005,
Abstract: Analyzes the most popular secure mechanism GSI in grid computing and the authorization system CAS based on GSI. Proposes own authorization scheme, which is based on local authentication and CAS. Different from GSI and CAS, users in the scheme only need to authenticate to local system before accessing to VO.
The Comparison Principle of Multidelay Hyperneutral Type Continuous System

MENG Pei-yuan,LI Ye-ping,

控制理论与应用 , 2001,
Abstract: We prove the comparison principles of the multidelay hyperneutral constant linear continuous system, the multidelay hyperneutral time varying linear continuous system, the multidelay hyperneutral non linear continouous system by inducing step by step, respectively, and obtain the precise sufficient conditions.
Efficacy of early lifestyle intervention on metabolic syndrome

Gui-Lan Zhang,Gang Guo,Ye-Ping Cheng,

老年心脏病学杂志(英文版) , 2010,
Abstract: Objective Intensive lifestyle intervention significantly reduces the progression to diabetes in high-risk individuals. This study aimed to investigate the efficacy of early lifestyle intervention on high-risk groups of metabolic syndrome. Methods In a two-arm randomized controlled 1-year trial, we compared the effectiveness of a general recommendation-based program of lifestyle intervention carried out by trained professionals versus standard unstructured information given by physicians at reducing the prevalence of multiple metabolic and inflammatory abnormalities in 306 adults aged 45-64 years in Xiaogan city, China. Results At baseline, clinical/ anthropometric/laboratory and lifestyle characteristics of the intervention (n=153) and control (n=153) groups were not significantly different. The former significantly reduced total/saturated fat intake and increased polyunsaturated fat/fiber intake and exercise level compared to the controls. Weight, waist circumference, high-sensitivity C-reactive protein, and most of the metabolic syndrome components decreased in the intervention group and increased in the controls after 12 months. Lifestyle intervention significantly reduced metabolic syndrome (OR=0.28; 95% CI 0.18-0.44), with a 31% (95% CI21-41) absolute risk reduction, corresponding to 3.2 (95% CI, 2-5) patients needing to be treated to prevent 1 case after 12 months. The intervention significantly reduced the prevalence of central obesity (OR=0.33; 95% CI, 0.20-0.56), and hypertriglyceridemia (OR=0.48; 95% CI, 0.31-0.75) and the incidence of diabetes (OR=0.23; 95% CI, 0.06-0.85). Conclusions A lifestyle intervention based on general recommendations was effective in reducing multiple metabolic/inflammatory abnormalities. The usual care by clinical physicians was ineffective at modifying progressive metabolic deterioration in high-risk individuals.
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