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IDV:Internet Domain Name Verification Based on Blockchain

Computer Modeling in Engineering & Sciences 2021年第10期129卷 299-322页

作者： ning Hu yu Teng yan Zhao Shi Yin yue Zhao Cyberspace Institute of Advanced Technology Guangzhou UniversityGuangzhou510006China Zhong Zi Hua Ke Traffic Construction Technology Co. Ltd.Beijing100195China Science and Technology on Communication Security Laboratory Chengdu610041China

The rapid development of blockchain technology has provided new ideas for network security ***-based network security enhancement solutions are attracting widespread *** paper proposes an Internet domain name verification method based on *** authenticity of DNS(Domain Name System)resolution results is crucial for ensuring the accessibility of Internet *** to the lack of adequate security mechanisms,it has always been a challenge to verify the authenticity of Internet domain name resolution *** the solution represented by DNSSEC(Domain Name System Security Extensions)can theoretically solve the domain name verification problem,it has not been widely deployed on a global scale due to political,economic,and technical *** argue that the root cause of this problem lies in the significant centralization of the DNS *** centralized feature not only reduces the efficiency of domain name verification but also has the hidden risks of single point of failure and unilateral *** users may disappear from the Internet due to the results of fake,subverted,or misconfigured domain name *** paper presents a decentralized DNS cache verification method,which uses the consortium blockchain to replace the root domain name server to verify the authenticity of the domain *** with DNSSEC’s domain name verification process,the verification efficiency of this method has increased by 30%,and there is no single point of failure or unilateral control *** addition,this solution is incrementally deployable,and even if it is deployed on a small number of content delivery network servers,satisfactory results can be obtained.

关键词： Blockchain-based network security DNS security DNS decentralization CDN

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Preparation and upconversion luminescence of YVO_4:Er^(3+),Yb^(3+)

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International Journal of Minerals,Metallurgy and Materials 2010年第2期17卷 225-228页

作者： Yong-ming Zhang yan-hong Li Peng Li Guang-yan Hong Ying-ning yu School of Materials Science and Engineering Shenyang Institute of Chemical Technology Shenyang 110142 China Key Laboratory of Rare Earth Chemistry and Physics Chinese Academy of Sciences Changchun 130022 China

YVO4：Er^3＋,Yb^3＋ with varying Yb^3＋ concentrations were prepared by a precipitation *** results of X-ray diffraction （XRD） show that all the samples have a tetragonal zircon structure; the calculated average crystallite sizes are in the range of 14-22 *** lattice constants and cell volume of the samples decrease slightly with the increase in Yb^3＋ *** upconversion luminescence spectra of all the samples were studied under 980 nm laser *** strong green emission is observed,which is attributed to the 2^H11/2→4I15/2 and 4^S3/2→4^I15/2 transitions of Er^3＋,and the red emission peaks in 650-675 nm can be *** emission intensity for the sample depends on the Yb^3＋*** results reveal that the upconversion processes of YVO4：Er^3＋,Yb^3＋ are related to the structure and the doping Yb^3＋ concentration of the sample.

关键词： yttrium vanadate rare earth doped materials precipitation method upconversion luminescence

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Speed Control of Motor Based on Improved Glowworm Swarm Optimization

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Computers, Materials & Continua 2021年第10期69卷 503-519页

作者： Zhenzhou Wang yan Zhang Pingping yu ning Cao Heiner Dintera School of Information Science and Engineering Hebei University of Science and TechnologyShijiazhuang050018China School of Internet of Things and Software Technology Wuxi Vocational College of Science and TechnologyWuxi214028China German-Russian Institute of Advanced Technologies Karan420126Russia

To better regulate the speed of brushless DC motors,an improved algorithm based on the original Glowworm Swarm Optimization is *** proposed algorithm solves the problems of poor robustness,slow convergence,and low accuracy exhibited by traditional PID *** selecting the glowworm neighborhood set,an optimization scheme based on the growth and competition behavior of weeds is applied to a single glowworm to prevent falling into a local optimal *** the glowworm’s position is updated,the league selection operator is introduced to search for the global optimal *** the local search ability of the invasive weed optimization with the global search ability of the league selection operator enhances the robustness of the algorithm and also accelerates the convergence speed of the *** mathematical model of the brushless DC motor is established,the PID parameters are tuned and optimized using improved Glowworm Swarm Optimization algorithm,and the speed of the brushless DC motor is *** a Simulink environment,a double closed-loop speed control model was established to simulate the speed control of a brushless DC motor,and this simulation was compared with a traditional PID *** simulation results show that the model based on the improved Glowworm Swarm Optimization algorithm has good robustness and a steady-state response speed for motor speed control.

关键词： PID speed control improved Glowworm Swarm Optimization brushless DC motor

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Discrete-time charge analysis for a digital RF charge sampling mixer

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第4期11卷 307-314页

作者： yun PAN ning GE Xiao-lang yan Xiao-peng yu Institute of VLS1 Design Zhejiang University Hangzhou 310027 China Department of Electronic Engineering Tsinghua University Beijing 100084 China

This paper presents an approach for analyzing the key parts of a general digital radio frequency(RF) charge sampling mixer based on discrete-time charge *** cascade sampling and filtering stages are analyzed and expressed in theoretical *** effects of a pseudo-differential structure and CMOS switch-on resistances on the transfer function are addressed in *** DC-gain is restrained by using the pseudo-differential *** transfer gain is reduced because of the charge-sharing time constant when taking CMOS switch-on resistances into *** unfolded transfer gains of a typical digital RF charge sampling mixer are analyzed in different cases using this approach.A circuit-level model of the typical mixer is then constructed and simulated in Cadence SpectreRF to verify the *** work informs the design of charge-sampling,infinite impulse response(ⅡR) filtering,and finite impulse response(FIR) filtering *** discrete-time approach can also be applied to other multi-rate receiver systems based on charge sampling techniques.

关键词： Digital RF Charge sampling Discrete-time Pseudo-differential Switch-on resistance

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Study on the glasswares discovered in the underground palace of the Da Bao En Temple in the North Song Dynasty(AD960 AD1127) in Nanjing,China

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Science China(Technological Sciences) 2012年第7期55卷 2006-2012页

作者： yu ning SONG yan yanG YiMin MA QingLin WANG ChangSui Laboratory of Human Evolution Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100049China Department of Scientific History and Archaeometry Graduate University of Chinese Academy of SciencesBeijing 100049China Chinese Academy of Cultural Heritage Beijing 100029China

Built by the royal family in the Ming Dynasty,the Da Bao En Temple is known as the greatest temple in ancient Nanjing,whose predecessor is the Chang Gan Temple built in the Six *** excavations of the Da Bao En Temple and the underground palace of Chang Gan Temple built in the North Song Dynasty(AD960 AD1127) have been appraised as one of the 10 greatest archaeological discoveries in 2010 in *** artefacts discovered in the underground palace have shown their important historical meanings and scientific values,such as the Qibao King Asoka Tower,golden and silver coffins,Buddhist relics,the silk textiles,glasses,and spices *** this paper,stereomicroscope,SEM-EDS and LA-ICP-AES are used to investigate chemical composition,microstructure and current preservation status for the unearthed *** results indicate that the glass bottle coded as TH1 and the glass calyx coded as TN5 are made of lead-silicate glass,while the chemical composition of the glass bottle coded as TN9 is quite distinct from that of native *** three articles have been weathered in some *** the shape,it is deduced that TH1 is a typical glassware used in burying Buddhist relics at that time,TN5 a domestic glassware with typical Sassanian style,and TN9 an imported Islamic glass,providing important information about culture exchanges between China and the foreign countries in the North Song Dynasty.

关键词： Da Bao En Temple chemical analysis lead glass Islamic glass culture exchange between China and the foreign countries

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A proactive secret sharing scheme based on Chinese remainder theorem

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Frontiers of Computer Science 2021年第2期15卷 133-142页

作者： Keju MENG Fuyou MIAO yu ning Wenchao HUANG yan XIONG Chin-Chen CHANG School of Computer Science and Technology University of Science and Technology of ChinaHefei230026China Department of Information Engineering and Computer Science Feng Chia UniversityTaichung40724China School of Computer Science and Technology Hangzhou Dianzi UniversityHangzhou310018China

If an adversary tries to obtain a secret s in a(t,n)threshold secret sharing(SS)scheme,it has to capture no less than t shares instead of the secret s ***,if a shareholder keeps a fixed share for a long time,an adversary may have chances to filch some shareholders’*** a proactive secret sharing(PSS)scheme,shareholders are supposed to refresh shares at fixed period without changing the *** this way,an adversary can recover the secret if and only if it captures at least t shares during a period rather than any time,and thus PSS provides enhanced protection to long-lived *** existing PSS schemes are almost based on linear SS but no Chinese Remainder Theorem(CRT)-based PSS scheme was *** paper proposes a PSS scheme based on CRT for integer ring to analyze the reason why traditional CRT-based SS is not suitable to design PSS ***,an ideal PSS scheme based on CRT for polynomial ring is also *** scheme utilizes isomorphism of CRT to implement efficient share refreshing.

关键词： proactive secret sharing Chinese remainder theorem polynomial ring integer ring isomorphism

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Certificateless network coding proxy signatures from lattice

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Frontiers of Computer Science 2023年第5期17卷 145-152页

作者： Huifang yu ning WANG School of Cyberspace Security Xi’an University of Posts&TelecommunicationsXi’an 710121China

Network coding can improve the information transmission efficiency and reduces the network resource consumption,so it is a very good platform for information *** proxy signatures are widely applied in information security ***,certificateless proxy signatures based on classical number theory are not suitable for the network coding environment and cannot resist the quantum computing *** view of this,we construct certificateless network coding proxy signatures from lattice(LCL-NCPS).LCL-NCPS is new multi-source signature scheme which has the characteristics of anti-quantum,antipollution and *** LCL-NCPS,each source node user can output a message vector to intermediate node and sink node,and the message vectors from different source nodes will be linearly combined to achieve the aim of improving the network transmission rate and network *** terms of efficiency analysis of space dimension,LCL-NCPS can obtain the lower computation complexity by reducing the dimension of proxy *** terms of efficiency analysis of time dimension,LCL-NCPS has higher computation efficiency in signature and verification.

关键词： lattice multi-source signature scheme proxy signature post-quantum

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驱控一体的旋拧式果实采摘执行器设计与试验

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农机化研究 2025年第3期47卷 48-55页

作者：严童杰冯青春郭鑫杨宁江苏大学电气信息工程学院江苏镇江212000 北京市农林科学院智能装备技术研究中心北京100097 国家农业智能装备工程技术研究中心北京100097 农业智能装备技术北京市重点实验室北京100097

针对果园智能化采收作业需要,设计了支持总线扩展的驱控一体旋拧采摘末端执行器,旨在为多臂并行采摘机器人研发提供支撑。在对标准苹果树果实物理形态统计分析基础上,结合人工采摘方法,提出了“吸附-夹持-旋拧”的采摘机械操作方法,并... 详细信息

针对果园智能化采收作业需要,设计了支持总线扩展的驱控一体旋拧采摘末端执行器,旨在为多臂并行采摘机器人研发提供支撑。在对标准苹果树果实物理形态统计分析基础上,结合人工采摘方法,提出了“吸附-夹持-旋拧”的采摘机械操作方法,并设计了基于双舵机驱动的紧凑型采摘执行机构,对其吸盘、夹持和旋拧电机的关键参数进行了优化设计。面向多执行并行采摘需要,设计了基于CANopen通讯的采摘操作驱动器,实现了多执行器的总线扩展。通过现场试验对执行器作业性能进行了测试,结果表明:果实大小在60~100 mm之间,采摘成功率可达到90%,吸盘最优停留时间为1.00 s,吸盘最优接近距离为1.0 mm,最优旋拧角度为360°。

关键词：采摘机器人驱控一体旋拧采摘 CANopen

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Research on Hydrodynamic Interference Suppression of Bottom-Mounted Monitoring Platform with Fairing Structure

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China Ocean Engineering 2018年第1期32卷 51-61页

作者： WANG Zhen ZHENG Yi MAO yu-feng WANG Ya-zhou yu yan-ting LIU Hong-ning Institute of Oceanographic Instrumentation Qilu University of Technology(Shandong Academy of Sciences)Qingdao 266061China Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology Qingdao 266061China National Engineering and Technological Research Center of Marine Monitoring Equipment Qingdao 266061China

In the disturbance of unsteady flow field under the sea, the monitoring accuracy and precision of the bottom-mounted acoustic monitoring platform will decrease. In order to reduce the hydrodynamic interference, the platform wrapped with fairing structure and separated from the retrieval unit is described. The suppression effect evaluation based on the correlation theory of sound pressure and particle velocity for spherical wave in infinite homogeneous medium is proposed and the difference value between them is used to evaluate the hydrodynamic restraining performance of the bottom-mounted platform under far field condition. Through the sea test, it is indicated that the platform with sparse layers fairing structure(there are two layers for the fairing, in which the inside layer is 6-layers sparse metal net, and the outside layer is 1-layer polyester cloth, and then it takes sparse layers for short) has no attenuation in the sound pressure response to the sound source signal, but obvious suppression in the velocity response to the hydrodynamic noise. The effective frequency of the fairing structure is decreased below 10 Hz, and the noise magnitude is reduced by 10 d B. With the comparison of different fairing structures, it is concluded that the tighter fairing structure can enhance the performance of sound transmission and flow restraining.

关键词： bottom-mounted fairing hydrodynamic interference acoustic impedance transmission loss

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Variation in Floral Sex Allocation and Reproductive Success in Sequentially Flowering Inflorescence of Corydalis remota var. lineariloba(Fumariaceae)

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Journal of Integrative Plant Biology 2009年第3期51卷 299-307页

作者： yan-Fei Zeng Wei-ning Bai yu Zhou Da-Yong Zhang Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering College of Life Sciences Beijing Normal University Beijing 100875 China State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

In hermaphroditic plants, female reproductive success often varies among different positions within an inflorescence. However, few studies have evaluated the relative importance of underlying causes such as pollen limitation, resource limitation or architectural effect, and few have compared male allocation. During a 2-year investigation, we found that female reproductive success of an acropetally flowering species, Corydalis remota Fisch. ex Maxim. var. lineariloba Maxim. was significantly lower in the upper late developing flowers when compared with the lower early flowers. Supplementation with outcross pollen did not improve female reproductive success of the upper flowers, while removal of the lower developing fruits significantly increased female reproductive success of the upper flowers in both years, evidencing resource limitation of the upper flowers. Female production in upper flowers was greatly improved by simultaneous pollen supplementation of the upper flowers and removal of the lower fruits, suggesting that, when resources are abundant, pollen may limit the female reproductive success of the upper flowers. The less seed mass in the upper flowers didn＇t increase in all treatments due to architecture. In the upper flowers, ovule production was significantly lower and the pollen ： ovule ratio was significantly higher. These results suggest that male-biased sex allocation in the upper flowers may lead to increased male reproductive success, whereas the lower flowers have higher female reproductive success.

关键词： architectural effect Corydalis remota var. lineariloba pollen limitation reproductive success resource limitation sequentially flowering sex allocation.

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