|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Buildup dynamics of multiple solitons in spatiotemporal mode-locked fiber lasers显示文摘Spatiotemporal mode locking is a nonlinear process of multimode soliton self-organization.Here the real-time buildup dynamics of the multiple solitons in a spatiotemporal mode-locked multimode fiber laser are investigated,assisted by the time-stretch technique.We find that the buildup processes are transverse mode dependent,especially during the stages of relaxation oscillation and Q-switching prior to multiple soliton formation.Furthermore,we observe that the transverse modal composition of these generated pulses among the multiple solitons can be different from each other,indicating the spatiotemporal structure of the multiple soliton.A simplified theoretical model based on pulse energy evolution is put forward to interpret the role of 3D saturable absorber on spatiotemporal structures of spatiotemporal mode-locking multiple solitons.Our work has presented the spatiotemporal nonlinear dynamics in multimode fiber lasers,which are novel to those inside the single transverse mode fiber lasers. | KEWEI LIU XIAOSHENG XIAO YIHANG DING HONGYAN PENG DONGDONG LV CHANGXI YANG | 2021 | Photonics Research2021，9，10： | 3 |
| 2 | A multidetector CT angiography study of variations in the circle of Willis in a Chinese population显示文摘 | Qi Li Jialun Li Fajin Lv Kewei Li Tianyou Luo Peng Xie | 2010 | Journal of Clinical Neuroscience2010，，3： | 1 |
| 3 | Overex- pression of an H^+-PPase gene from Thellungiella halophila in cotton enhances salt tolerance and im- proves growth and photosynthetic performance 显示文摘 | LV S L ZHANG Kewei GAO Qiang | 2008 | Plant Cell Physiol2008，49，8： | 1 |
| 4 | Constant-round auction with insulated bidders显示文摘Dear editor,In recent years,online auction has gained widespread popularity as a primary characteristic of electronic commerce among masses.It has also become a primary topic of research interest.Cryptographic primitives such as secure multiparty computation(MPC)[1],zero-knowledge proof(ZKP)[2]and commitment scheme[3]are being effectively utilized for the proposal of various schemes.Therefore,these schemes have become much more inefficient and complicated,thereby rendering them suitable only for auction with a small number of bidders.Efficiency needs to be considered as an important factor for a real auction,especially if it is conducted online. | Jie MA Bin QI Kewei LV | 2022 | Science China(Information Sciences)2022，65，4： | 0 |
| 5 | Improved Algorithm for Solving Discrete Logarithm Problem by Expanding Factor显示文摘The discrete logarithm problem(DLP)is to find a solution n such that g^n=h in a finite cyclic group G=,where h∈G.The DLP is the security foundation of many cryptosystems,such as RSA.We propose a method to improve Pollard’s kangaroo algorithm,which is the classic algorithm for solving the DLP.In the proposed algorithm,the large integer multiplications are reduced by controlling whether to perform large integer multiplication.To control the process,the tools of expanding factor and jumping distance are introduced.The expanding factor is an indicator used to measure the probability of collision.Large integer multiplication is performed if the value of the expanding factor is greater than the given bound.The improved algorithm requires an average of(1.633+o(1))q(1/2)times of the large integer multiplications.In experiments,the average large integer multiplication times is approximately(1.5+o(1))q(1/2). | Bin Qi Jie Ma Kewei Lv | 2020 | China Communications2020，17，4： | 0 |
| 6 | A novel data channel fault detection mechanism in optical burst switching networks显示文摘 | 常交法 Wang Ruyan Long Keping Yang Xiaolong Lv Kewei Duan Zhenying | 2007 | High Technology Letters2007，13，3： | 0 |
| 7 | Zero-pole cancellation for identity-based aggregators:a constant-size designated verifier-set signature显示文摘In this paper we present a designated verifier-set signature(DVSS),in which the signer allows to designate many verifiers rather than one verifier,and each designated verifier can verify the validity of signature by himself.Our research starts from identity-based aggregator(IBA)that compresses a designated set of verifier’s identities to a constant-size random string in cryptographic space.The IBA is constructed by mapping the hash of verifier’s identity into zero or pole of a target curve,and extracting one curve’s point as the result of aggregation according to a specific secret.Considering the different types of target curves,these two IBAs are called as zeros-based aggregator and poles-based aggregator,respectively.Based on them,we propose a practical DVSS scheme constructed from the zero-pole cancellation method which can eliminate the same elements between zeros-based aggregator and poles-based aggregator.Due to this design,our DVSS scheme has some distinct advantages:(1)the signature supporting arbitrary dynamic verifiers extracted from a large number of users;and(2)the signature with short and constant length.We rigorously prove that our DVSS scheme satisfies the security properties:correctness,consistency,unforgeability and exclusivity.This is a preview of subscription content,log in to check access. | E CHEN Yan ZHU Changlu LIN Kewei LV | 2020 | Frontiers of Computer Science2020，14，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员