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Search Results: 1 - 10 of 380570 matches for " 魏旭光<br>LI Yan-ping "
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支持用户撤销的多授权机构的属性加密方案
Multi-authority and revocable attribute-based encryption scheme

李艳平,齐艳姣,张凯,<br>LI Yan-ping, QI Yan-jiao, ZHANG Kai, WEI Xu-guang
- , 2018, DOI: 10.6040/j.issn.1671-9352.0.2017.399
Abstract: 摘要: 目前多数基于属性加密的云存储访问控制研究是基于单授权机构,系统内仅有一个授权机构为用户颁发属性密钥,可信而好奇的单授权机构会凭借用户提交的属性对用户的身份、职业等隐私信息进行判断和推测,特别是在单授权机构不可信或遭受恶意攻击的情况下,可能造成密钥泄露而导致云端数据被非法解密。为了避免上述两种安全问题,结合现有的多授权机构的思想,使不同权限的授权机构管理不同属性并进行属性相关密钥分发,大大降低了单一信任机构的工作量,解决了单授权机构下的密钥泄露或滥用问题,同时提高了用户的隐私数据保护;通过访问树技术实现了AND、OR及Threshold灵活访问策略,且将用户身份标识设置在访问树中来实现用户的撤销,撤销出现后只需更新部分密文而无需更新属性密钥,因而减少了计算开销。在标准模型下证明了该方案在选择身份属性攻击模型下是安全的,其安全性规约到判定性双线性Diffie-Hellman(decisional bilinear Diffie-Hellman, DBDH)问题。
Abstract: Most of the existing attribute-based encryption schemes are based on a single authority. That is, there is only one authority in the system to issue the key to the user. The curious authority will speculate the user's identity, occupation and other private information by the user's attributes. In particular, if the single authority suffered malicious attacks, it maybe cause the leakage of private key and the breach of cloud data confidentiality. In order to avoid the above two kinds of problems, multi-authority is introduced in this paper. The different authorities manage different attributes and distribute the attributes key to users, which greatly decreases the single authority's workload, improves the protection of user privacy data and solves the key escrow under a single or abuse authority. AND, OR and Threshold are flexible realized by using the access tree, and the user identity is set in the access tree to achieve the user's direct revocation. When the revocation occurs, the whole system only needs to update parts of the ciphertext without updating the attribute key, thus reducing the computational overhead of the cloud storage message. Finally, the proposed scheme is proved secure under the chosen identity attribute attack in the standard model, and the security of the scheme is built on the hardness assumption of decision bilinear Diffie-Hellman(DBDH)problem
白介素-17A对胰岛素信号通路的影响及机制探讨
Effect of Interleukin-17A on Insulin Signaling Pathway

李燕平,沈天然,,凌文华<br>LI Yan-ping, SHEN Tian-ran, CHEN Xu, LING Wen-hua
- , 2016,
Abstract:
RELATIONSHIP BETWEEN MITOCHONDRIAL MEMBRANE POTENTIAL AND CELL LIVABILITY IN PHOTODYNAMIC THERAPY
光动力过程中线粒体膜电位和细胞存活关系

WEI Rong-hui,HUANG Yan-ping,LI Lin,QI Chun-yuan,<br>荣慧,黄燕萍,李琳,祁春媛
生物物理学报 , 2005,
Abstract: With ANS as fluorescence probe, effect of three metal phthalocyanines on mitochondrial membrane surface potential and charge density in photodynamic therapy were investigated; meanwhile, cell survival was studied by MTT. Results showed that effect of ZnPcS was most prominent and its effect on mitochondrial membrane surface potential was coincident with the result of MTT. The mitochondrial membrane may be the binding site of photosensitizers in PDT. Because of the close relationship between mitochondrial membrane potential and cell apoptosis, the effect of photosensitizers on mitochondrial membrane surface potential proves an evidence for its curative effect, and the physical mechanism in PDT was discussed.
A New Multi-party Non-repudiation Protocol
一种新的多方不可否认协议

LI Yan-Ping,SI Guang-Dong,WANG Yu-Min,<br>李艳平,,王育民
计算机科学 , 2006,
Abstract: Expected strong fairness and certified strong fairness, two executie results of non-repudiation protocols, are firstly introduced, and the former is superior to the later. Based on the GPS digital signature scheme and a group encry ption scheme, a new multi-party non-repudiation protocol with an off-line trusted third party is presented. The presented protocol provides"expected strong fairness", and allows one sender to send different messages to multiple different recipients, eliminates the previous restriction on the exchange of the"same message". The sender can barter with any recipients at his will and it makes the protocol more practical. The security analysis are given finally.
Nonlinear Optical Properties of Novel C60 Derivatives under Picosecond Laser Excitation
MAO Yan-Li,CHENG Yong-Guang,LIU Jun-Hui,LIN Bing-Chen,HUO Yan-Ping,ZENG He-Ping,<br>毛艳丽,程永,刘军辉,林丙臣,霍延平,曾和平
中国物理快报 , 2007,
Abstract: We investigate the third-order nonlinear optical properties of six novel fullerene derivatives under picosecond laser excitation by Z-scan technique. The experimental results reveal that all the derivatives have very large nonlinear absorption coefficient under 532 nm pulses excitation and great third-order nonlinear refraction index under 1064 nm pulses excitation. The molecular second hyperpolarizabilities are obtained from the experimental results.
FAST WAVE MINORITY ION HEATING
快波少数离子加热

ZHU XUE-GUANG,KUANG GUANG-LI,ZHAO YAN-PING,LI YOU-YI,XIE JI-KANG,<br>朱学,,赵燕平,李有宜,谢纪康
物理学报 , 1999,
Abstract: The mechanism of fast wave minority ion heating is discussed in some detail. The ray tracing algorithm is used to simulate fast wave heating for the plasma of two kinds of ions, and the calculation results of different ratios of two ions' density is obtai
AN IMPROVED MODEL OF COUPLE CALCULATION OF ION CYCLOTRON WAVE HEATING
离子回旋波加热天线耦合的一种改进模型

ZHU XUE-GUANG,KUANG GUANG-LI,ZHAO YAN-PING,LI YOU-YI,XIE JI-KANG,<br>朱学,,赵燕平,李有宜,谢纪康
物理学报 , 1998,
Abstract: The electromagnetic field distribution of ion cyclotron wave in tokamak geometry is discussed in detail in this paper.As for the problem that conventional antenna coupling slab model gives larger error to the calculation of large aperture antenna,an improved model is presented that can upgrade the calculation precision greatly.The theoretically computed results are in good agreement with the experimental observation.
FOKKER-PLANCK EQUATION IN THE APPLICATION OF FAST WAVE HEATING
Fokker-Planck方程在快波加热中的应用

ZHU XUE-GUANG,KUANG GUANG-LI,ZHAO YAN-PING,LI YOU-YI,XIE JI-KANG,<br>朱学,,赵燕平,李有宜,谢纪康
物理学报 , 1998,
Abstract: The standard normal distribution for particles in tokamak geometry is usually assumed in fast wave heating.In fact,due to the quasi-linear diffusion effect,the parallel and vertical temperatures of the resonant particles are not equal to each other,so,this will bring some error.For this case,the Fokker-Planck equation is introduced in this paper,and iteration algorithm is adopted to solve the problem well.
Numerical Analysis of Esterase Isozymes in Seeds of Astragalus membranaceus (Fisch.) Bge. var. mongholicus (Bge.) Hsiao Cultivated in Longxi County
陇西栽培蒙古黄芪酯酶同工酶数量分析

XIE Xiao-Long,HU Yan-Ping,ZHAO Xu-Dong,WANG Li,LI Yi,<br>谢小龙,胡延萍,,王莉,李毅
中国科学院研究生院学报 , 2007,
Abstract: The esterase isozyme system in the seeds of Astragalus membranaceus (Fisch.) Bge.var.mongholicus (Bge.) Hsiao cultivated in Longxi county was studied by means of vertical polyacrylamide gel electrophoresis.The results showed that the individuals of A.membranaceus var.mongholicus were heterogenous and the cultivated population was seriously mixed.The esterase isozyme electrophoresis used in this paper was an effective method for detecting intraspecific variation of A.membranaceus var.mongholicus.
Homodimerization of the c-Abl Protein Tyrosine Kinase
c-Abl蛋白酪氨酸激酶形成同源二聚体

WEI Ling,LIU Xuan,YI Yan-Ping,LI Chu-Fang,WANG Yun-Long,CAO Cheng,<br>,刘萱,易艳萍,李楚芳,王云龙,曹诚
生物工程学报 , 2005,
Abstract: The c-Abl nonreceptor tyrosine kinase is activated in the cellular responses to genotoxic, oxidative and other forms of stress. Using tagged forms of c-Abl, the present studies demonstrate that c-Abl forms homodimers in cells. The results show that the c-Abl N-terminal regions interact with the corresponding C-terminal regions of both partners in the dimmer. Specifically, the c-Abl SH3 domain binds to a proline-rich motif at amino acids 958-982 in the c-Abl C-terminal region. Deletion of the prolinerich motif disrupts dimmer formation. These findings provide the first evidence that c-Abl forms homodimers and indicate that homodimerization can contribute to the regulation of c-Abl activity.
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