检索结果-南通市图书馆

Protected Fair Secret Sharing Based Bivariate Asymmetric Polynomials in Satellite Network

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第9期72卷 4789-4802页

作者： Yanyan Han Jiangping Yu Guangyu Hu Chenglei Pan dingbang xie Chao Guo Abdul Waheed Department of Electronics and Communication Engineering Beijing Electronics Science and Technology InstituteBeijing100070China State Key Laboratory of Integrated Services Networks Xidian UniversityXi’an710126China Department of Cryptography and Technology Beijing Electronics Science and Technology InstituteBeijing100070China Department of Cyberspace Security Beijing Electronic Science and Technology InstituteBeijing100070China School of Communication Engineering Xidian UniversityXi’an710126China Institute of Information Engineering Chinese Academy of SciencesBeijing100093China University of Management Technology Lahore-Pakistan55300Pakistan

Verifiable secret sharing mainly solves the cheating behavior between malicious participants and the ground control center in the satellite *** verification stage can verify the effectiveness of secret shares issued by the ground control center to each participant and verify the effectiveness of secret shares shown by *** use a lot of difficult assumptions based on mathematical problems in the verification stage,such as solving the difficult problem of the discrete logarithm,large integer prime factorization,and so *** with other verifiable secret sharing schemes designed for difficult problems under the same security,the verifiable secret sharing scheme based on the Elliptic Curve Cryptography(ECC)system has the advantages of less computational overhead and shorter *** present,the binary polynomial is a single secret scheme and cannot provide effective ***,based on a Protected Verifiable Synchronous Multi Secret Sharing(PVS-MSS)scheme,this paper is designed based on bivariate asymmetric *** advanced verifiable attribute is introduced into the Protected Secret Sharing(PSS)*** paper extends the protected synchronous multi-secret sharing scheme based on bivariate polynomial *** ECC system constructs the security channel between the ground control center and participants and constructs the verification *** the verification algorithm,any participant can verify the consistency and effectiveness of the secret shadow and secret share received from other participants or presented by the secret distribution ***,no additional key agreement protocol is required;participants do not need to negotiate the session key for encryption;the secret share polynomial can generate the session key between participants and speed up the secret reconstruction *** verification stage has lower computational complexity than the verifiable scheme constructed by Rivest Shamir Adleman (RS

关键词： Multi-secret sharing binary asymmetric verifiable synchronization protected satellite network

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

针药结合治疗男性勃起功能障碍临床观察

湖北中医药大学学报 2016年第2期18卷 29-31页

作者：谢定邦广西壮族自治区来宾市人民医院中医科广西壮族自治区来宾546100

目的观察针灸结合苁蓉益肾颗粒治疗男性勃起功能障碍临床疗效。方法将80例患者随机分为两组。对照组采用苁蓉益肾颗粒治疗,治疗组在对照组基础上结合针灸治疗。两组疗程均为4周。比较两组患者治疗疗效,治疗前后勃起功能国际指数问卷(IIE... 详细信息

目的观察针灸结合苁蓉益肾颗粒治疗男性勃起功能障碍临床疗效。方法将80例患者随机分为两组。对照组采用苁蓉益肾颗粒治疗,治疗组在对照组基础上结合针灸治疗。两组疗程均为4周。比较两组患者治疗疗效,治疗前后勃起功能国际指数问卷(IIEF-5)评分、血清睾酮水平变化及治疗期间不良反应发生情况。结果治疗组总有效率高于对照组(P<0.05);两组IIEF-5评分明显增加(P<0.05);治疗组IIEF-5评分治疗后高于对照组(P<0.05);两组血清睾酮水平明显增加(P<0.05);治疗组血清睾酮水平治疗后高于对照组(P<0.05);两组患者均未见严重不良反应。结论针药结合治疗男性勃起功能障碍患者临床疗效安全可靠,具有重要研究价值。

关键词：男性勃起功能障碍中医药疗法针灸疗法苁蓉益肾颗粒

在线全文

学校读者我要写书评

暂无评论

一种基于二元多项式的多秘密共享方案

计算机应用与软件 2023年第4期40卷 305-310,349页

作者：韩妍妍谢定邦郭超赵洪北京电子科技学院通信工程系北京100070 西安电子科技大学通信工程学院陕西西安710071

近年来,二元多项式多被用来构造秘密共享方案,但构造的多秘密共享方案不能很好兼顾二元多项式性质与安全性。针对这种情况,提出基于二元非对称多项式的一种新的多秘密共享方案。参与者获得的秘密份额不仅可以用于重建多个秘密,还可用于... 详细信息

近年来,二元多项式多被用来构造秘密共享方案,但构造的多秘密共享方案不能很好兼顾二元多项式性质与安全性。针对这种情况,提出基于二元非对称多项式的一种新的多秘密共享方案。参与者获得的秘密份额不仅可以用于重建多个秘密,还可用于生成任意参与者之间的会话密钥。会话密钥可以在秘密重建过程中保护重构者间信息交换的安全。方案无需任何密码学假设,是无条件安全的。通过安全性分析,可抵抗内部合谋攻击和重构过程中的外部攻击。该方案在实际环境中不需要额外的密钥协商机制来构建参与者间的安全通道,实现一次并行重构多个秘密,提高了实际运行效率。

关键词：多秘密共享二元多项式会话密钥无条件安全

Multi-layer multi-pass friction rolling additive manufacturing of Al alloy:Toward complex large-scale high-performance components

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 425-438页

作者： Haibin Liu Run Hou Chenghao Wu Ruishan xie Shujun Chen College of Mechanical&Energy Engineering Beijing University of TechnologyBeijing 100124China Chongqing Research Institute of Beijing University of Technology Chongqing 401121China

At present,the emerging solid-phase friction-based additive manufacturing technology,including friction rolling additive man-ufacturing(FRAM),can only manufacture simple single-pass *** this study,multi-layer multi-pass FRAM-deposited alumin-um alloy samples were successfully prepared using a non-shoulder tool *** material flow behavior and microstructure of the over-lapped zone between adjacent layers and passes during multi-layer multi-pass FRAM deposition were studied using the hybrid 6061 and 5052 aluminum *** results showed that a mechanical interlocking structure was formed between the adjacent layers and the adja-cent passes in the overlapped center *** friction and rolling of the tool head led to different degrees of lateral flow and plastic deformation of the materials in the overlapped zone,which made the recrystallization degree in the left and right edge zones of the over-lapped zone the highest,followed by the overlapped center zone and the non-overlapped *** tensile strength of the overlapped zone exceeded 90%of that of the single-pass deposition *** is proved that although there are uneven grooves on the surface of the over-lapping area during multi-layer and multi-pass deposition,they can be filled by the flow of materials during the deposition of the next lay-er,thus ensuring the dense microstructure and excellent mechanical properties of the overlapping *** multi-layer multi-pass FRAM deposition overcomes the limitation of deposition width and lays the foundation for the future deposition of large-scale high-performance components.

关键词： aluminum alloy additive manufacturing solid-state friction stir welding multi-layer multi-pass

Superhydrophobic and corrosion-resistant siloxane-modified MgAl-LDHs coatings on magnesium alloy prepared under mild conditions

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 450-463页

作者： Wenxi Zhang Zhangzelong Zhuo Dan Xu Liang Wu Zhihui xie Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China College of Materials Science and Engineering/National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

We have developed a superhydrophobic and corrosion-resistant LDH-W/PFDTMS composite coating on the surface of Mg *** composite comprised a tungstate-intercalated(LDH-W)underlayer that was grown at low temperature(relative to hydrothermal reaction conditions)under atmospheric pressure and an outer polysiloxane layer created from a solution containing perfluorodecyltrimethoxysilane(PFDTMS)using a simple immersion *** successful intercalation of tungstate into the LDH phase and the following formation of the polysiloxane layer were confirmed through X-ray diffraction(XRD),Fourier transform infrared(FTIR)spectroscopy,and X-ray photoelectron spectroscopy(XPS).The corrosion resistance of the LDH-W film,both before and after the PFDTMS modification,was evaluated using electrochemical impedance spectroscopy(EIS),Tafel curves,and immersion *** results showed that Mg coated with LDH-W/PFDTMS exhibited significantly enhanced corrosion protection compared to the unmodified LDHW film,with no apparent signs of corrosion after exposure to 3.5wt%NaCl solution for 15 ***,the LDH-W/PFDTMS coating demonstrated superior superhydrophobicity and self-cleaning properties against water and several common beverages,as confirmed by static contact angle and water-repellency *** results offer valuable insights into preparing superhydrophobic and corrosion-resistant LDH-based composite coatings on Mg alloy surfaces under relatively mild reaction conditions.

关键词： Mg alloy corrosion coating layered double hydroxide

Unraveling the significance of cobalt on transformation kinetics,crystallography and impact toughness in high-strength steels

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 380-390页

作者： Yishuang Yu Jingxiao Zhao Xuelin Wang Hui Guo Zhenjia xie Chengjia Shang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

This work reveals the significant effects of cobalt(Co)on the microstructure and impact toughness of as-quenched highstrength steels by experimental characterizations and thermo-kinetic *** results show that the Co-bearing steel exhibits finer blocks and a lower ductile-brittle transition temperature than the steel without ***,the Co-bearing steel reveals higher transformation rates at the intermediate stage with bainite volume fraction ranging from around 0.1 to *** improved impact toughness of the Co-bearing steel results from the higher dense block boundaries dominated by the V1/V2 variant ***,the addition of Co induces a larger transformation driving force and a lower bainite start temperature(BS),thereby contributing to the refinement of blocks and the increase of the V1/V2 variant *** findings would be instructive for the composition,microstructure design,and property optimization of high-strength steels.

关键词： high-strength steel cobalt transformation kinetics crystallography impact toughness

Local-contrastive-learning machine with both generalization and adversarial robustness: A statistical physics analysis

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 109-123页

作者： Mingshan xie Yuchen Wang Haiping Huang PMI Lab School of Physics Sun Yat-sen University Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Sun Yat-sen University

Distinct from human cognitive processing, deep neural networks trained by backpropagation can be easily fooled by adversarial examples. To design a semantically meaningful representation learning, we discard backpropagation, and instead, propose a local contrastive learning, where the representations for the inputs bearing the same label shrink(akin to boson) in hidden layers,while those of different labels repel(akin to fermion). This layer-wise learning is local in nature, being biologically plausible.A statistical mechanics analysis shows that the target fermion-pair-distance is a key parameter. Moreover, the application of this local contrastive learning to MNIST benchmark dataset demonstrates that the adversarial vulnerability of standard perceptron can be greatly mitigated by tuning the target distance, i.e., controlling the geometric separation of prototype manifolds.

关键词： machine learning statistical mechanics adversarial robustness neural networks

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

泛在学习环境下MOOC资源个性化应用研究

无线互联科技 2018年第11期15卷 83-85页

作者：王文东武海妮侯勉李恩光谢定邦延安大学计算机学院陕西延安716000 延安大学西安创新学院陕西西安710100

随着科技的进步,学习方式不断变革,泛在学习成了新型的学习方式。文章针对MOOC资源系统在当下的发展和泛在学习的泛在性,围绕泛在学习理论探讨、泛在学习环境构建、泛在学习平台架构、泛在资源建设几方面进行说明,对泛在学习环境下MOOC... 详细信息

随着科技的进步,学习方式不断变革,泛在学习成了新型的学习方式。文章针对MOOC资源系统在当下的发展和泛在学习的泛在性,围绕泛在学习理论探讨、泛在学习环境构建、泛在学习平台架构、泛在资源建设几方面进行说明,对泛在学习环境下MOOC资源进行了个性化应用设计。

关键词：泛在学习 MOOC资源应用设计

FK506 contributes to peripheral nerve regeneration by inhibiting neuroinflammatory responses and promoting neuron survival

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 2108-2115页

作者： Yuhui Kou Zongxue Jin Yusong Yuan Bo Ma Wenyong xie Na Han Department of Trauma and Orthopedics Peking University People’s HospitalBeijingChina National Center for Trauma Medicine Peking University People’s HospitalBeijingChina Key Laboratory of Trauma and Neural Regeneration(Peking University) Ministry of EducationBeijingChina Trauma Medicine Center Peking University People’s HospitalBeijingChina Department of Orthopedics China-Japan Friendship HospitalBeijingChina

FK506(Tacrolimus)is a systemic immunosuppressant approved by the *** and Drug ***506 has been shown to promote peripheral nerve regeneration,however,its precise mechanism of action and its pathways remain *** this study,we established a rat model of sciatic nerve injury and found that FK506 improved the morphology of the injured sciatic nerve,increased the numbers of motor and sensory neurons,reduced inflammatory responses,markedly improved the conduction function of the injured nerve,and promoted motor function *** findings suggest that FK506 promotes peripheral nerve structure recovery and functional regeneration by reducing the intensity of inflammation after neuronal injury and increasing the number of surviving neurons.

关键词： FK506 inflammation motor neurons nerve regeneration neuron peripheral nerve injury sensory neurons