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The orbital period variations of AH Virginis

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Research in Astronomy and Astrophysics 2015年第2期15卷 275-280页

作者： Ming Chen Fu-yuan Xiang yun-Xia yu ting-yu Xiao Department of Physics Xiangtan University Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences

Abstract We present a study of orbital period changes in AH Virginis. We perform a careful literature search for all available minima times, from which we derived a new linear ephemeris and constructed an O - C curve. We found that the orbital period of AH Virginis shows a long-term increase, dP/dt = （2.1869 ± 0.0161） × 10^-7 d yr^-1, and a small periodic variation with a period of 37.19 yr. Since AH Virginis is an over- contact system and the primary component shows strong Ha and Mg II emission lines, we discuss the possible connection between mass transfer, magnetic activity and or- bital period changes.

关键词： binaries: close binaries: eclipsing stars: individual (AH Virginis)

Self-certified multi-proxy signature schemes with message recovery

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第2期10卷 290-300页

作者： Tzong-sun WU Chien-lung hsu Han-yu LIN Department of Computer Science and Engineering National Taiwan Ocean University Keelung 202 Taiwan China Department of Information Management Chang Gung University Taoyuan 333 Taiwan China Department of Computer Science National Chiao Tung University Hsinchu 300 Taiwan. China

Multi-proxy signature schemes allow the original signer to delegate his/her signing power to n proxy signers such that all proxy signers must corporately generate a valid proxy signature on behalf of the original signer. We first propose a multi-proxy signature scheme based on discrete logarithms and then adapt it to the elliptic curve cryptosystem. With the integration of self-certified public-key systems and the message recovery signature schemes,our proposed schemes have the following advan-tages:(1) They do not require the signing message to be transmitted,since the verifier can recover it from the signature;(2) The authentication of the public keys,verification of the signature,and recovery of the message can be simultaneously carried out in a single logical step;(3) No certificate is needed for validating the public keys. Further,the elliptic curve variant with short key lengths especially suits the cryptographic applications with limited computing power and storage space,e.g.,smart cards. As compared with the previous work that was implemented with the certificate-based public-key systems,the proposed schemes give better performance in terms of communication bandwidth and computation efforts.

关键词： Self-certified Multi-proxy signature Message recovery Smart cards Discrete logarithms Elliptic curve

Unlocking stability:Preserving activity of biomimetic catalysts with covalent organic framework cladding

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Chinese Chemical Letters 2024年第6期35卷 1-2页

作者： ting Wang Xin yu Yaqiang Xie College of the Environment&Ecology Xiamen UniversityXiamen 361102China

Enzymes are extremely complicated biocatalysts in several industrial processes due to their numerous advantages over conventional catalysts,including lower physiological and environmental toxicity,exceptional selectivity,and milder reaction conditions[1].However,their widespread applications are constrained by the high production costs,low operational stability,and complexity involved in the recovery and reusability of enzymes[2].

关键词： stability catalysts exceptional

Spatio-temporal characteristics of population and economy in transitional geographic space at the southern end of"Hu Huan-yong Line"

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Journal of Mountain Science 2022年第2期19卷 350-364页

作者： DENG Wei CHENG yu-fang yu Huan PENG Li KONG Bo HOU yu-ting School of Geography and Resource Science Sichuan Normal UniversityChengdu 610066China School of Earth Sciences Chengdu University of TechnologyChengdu 610059China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China Institute of Aerospace Information Innovation Chinese Academy of SciencesBeijing 100094China

"Hu Huan-yong Line(Hu Line)"depicts a geographical pattern of China’s population *** essence is the regionality of humanland relationship and reflects basic characteristics and laws of human beings’adaptation to the natural *** the development of the times and the progress of modern science and technology,especially the rapid urbanization and construction of transportation network system in China,the connection between economic and geographical space has been continuously *** geographical transition zones from mountain areas to plains,i.e.,transitional geographical space,have promoted the changes in human-land relationships through population migration and *** Sichuan-yunnan provinces at the southern end of Hu Line as study area,this study analyzed the spatial correlation between population distribution and economy in this region,explored the pattern of geographical agglomeration and deagglomeration,and explained the changing characteristics of humanland relationship in transitional geographic space using global Moran’s I index,global regression model(GRM)and geographically weighted regression(GWR).The results show that population and Gross Domestic Product(GDP)have significant spatial dependence to this region,with obvious aggregation in geographical distribution and positive autocorrelation;comparing with the general least square model,the GWR model incorporating spatial effect was more suitable for revealing the distribution characteristics of geographical elements,with fine results and better fitting;the spatial model of population and GDP as well as the spatio-temporal evolution model of their changes,all of them strongly indicated that Normalized Difference Vegetation Index(NDVI)and road density were important factors governing the spatial differentiation of population and economy;under the rapid development of regional economy and continuous evolution of urban-rural relations,rural transformation and spa

关键词： Hu Huan-yong Line Spatial correlation Geographically weighted regression Population distribution Transitional geographic space

SiC nanowire-based SU-8 with enhanced mechanical properties for MEMS structural layer design

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Nanotechnology and Precision Engineering 2019年第4期2卷 169-176页

作者： yu Yang Liyan Lai Guifu Ding ting Chen National Key Laboratory of Science and Technology on Micro/Nano Fabrication Shanghai Jiao Tong University

In addition to being used for pattern transfer,the negative photoresist SU-8 iswidely used as a structural material in microelectromechanical systems(MEMS).Due to its good photopatternability,SU-8 has lower manufacturing costs than many other materials,but its mechanical properties are relatively weak to some extent,which limits its *** mechanical properties of epoxy-like SU-8 can be enhanced by addingmicro-or nano-fillers such as carbon nanotube,clay,and SiC nanowire,which have superior elastic *** this study,SiC nanowires were used to improve the mechanical properties of SU-8 while the SU-8 retains its *** SiC nanowires were uniformly dispersed in SU-8 by stirring and ***-8 materials with different SiC nanowire contents were fabricated into dog bone samples by *** elastic modulus,storage modulus,and damping factor of the samples were measured by the Dynamic mechanical analysis(DMA)*** experiment result shows that the rigidity and toughness increased,and the damping *** 2 wt%SiC nanowires-reinforced SU-8 had a 73.88%increase in elastic modulus and a 103.4%increase in elongation at ***,a spring component made by SiC-doped SU-8 could withstand greater *** SiC nanowires-reinforced SU-8 has the potential tomeet higher requirements in the design andmanufacture of MEMS and greatly reduce the manufacturing costs of MEMS devices.

关键词： SU-8 SiC nanowires Elastic modulus Dynamic mechanical analysis(DMA)

Development of Genomic Microsatellite Multiplex PCR Using Dye-Labeled Universal Primer and Its Validation in Pedigree Analysis of Pacific Oyster(Crassostrea gigas)

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Journal of Ocean University of China 2017年第1期16卷 151-160页

作者： LIU ting LI Qi SONG Junlin yu Hong Key Laboratory of Mariculture of Ministry of Education Ocean University of ChinaQingdao 266003P.R.China

There is an increasing requirement for traceability of aquaculture products, both for consumer protection and for food safety. There are high error rates in the conventional traceability systems depending on physical labels. Genetic traceability technique depending on DNA-based tracking system can overcome this problem. Genealogy information is essential for genetic traceability, and microsatellite DNA marker is a good choice for pedigree analysis. As increasing genotyping throughput of microsatellites, microsatellite multiplex PCR has become a fast and cost-effective technique. As a commercially important cultured aquatic species, Pacific oyster Crassostrea gigas has the highest global production. The objective of this study was to develop microsatellite multiplex PCR panels with dye-labeled universal primer for pedigree analysis in C. gigas, and these multiplex PCRs were validated using 12 full-sib families with known pedigrees. Here we developed six informative multiplex PCRs using 18 genomic microsatellites in C. gigas. Each multiplex panel contained a single universal primer M13(-21) used as a tail on each locus-specific forward primer and a single universal primer M13(-21) labeled with fluorophores. The polymorphisms of the markers were moderate, with an average of 10.3 alleles per locus and average polymorphic information content of 0.740. The observed heterozygosity per locus ranged from 0.492 to 0.822. Cervus simulations revealed that the six panels would still be of great value when massive families were analysed. Pedigree analysis of real offspring demonstrated that 100% of the offspring were unambiguously allocated to their parents when two multiplex PCRs were used. The six sets of multiplex PCRs can be an important tool for tracing cultured individuals, population genetic analysis, and selective breeding program in C. gigas.

关键词： Crassostrea gigas traceability microsatellites universal primer multiplex PCR pedigree analysis

Bipartite consensus of edge dynamics on coopetition multi-agent systems

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Science China(Information Sciences) 2019年第12期62卷 257-268页

作者： Lei TIAN Zhijian JI ting HOU Haisheng yu Institute of Complexity Science College of Automation and Electrical Engineering Qingdao University School of Mathematics and Statistics Qingdao University College of Mathematics and Systems Science Shandong University of Science and Technology

Dear editor,The cooperative control of multi-agent systems has attracted wide attention from scholars in various fields because of its wide applications. The controllability and consensus problem of multi-agent system... 详细信息

关键词： Bipartite consensus of edge dynamics on coopetition multi-agent systems agent

Sequential Fault Diagnosis Using an Inertial Velocity Differential Evolution Algorithm

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International Journal of Automation and computing 2019年第3期16卷 389-397页

作者： Xiao-Hong Qiu yu-ting Hu Bo Li Software School Jiangxi University of Science and TechnologyNanchang 330013China College of Information Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

The optimal test sequence design for fault diagnosis is a challenging NP-complete *** improved differential evolution(DE)algorithm with additional inertial velocity term called inertial velocity differential evolution(IVDE)is proposed to solve the optimal test sequence problem(OTP)in complicated electronic *** proposed IVDE algorithm is constructed based on adaptive differential evolution *** it is used to optimize the test sequence sets with a new individual fitness function including the index of fault isolation rate(FIR)satisfied and generate diagnostic decision tree to decrease the test sets and the test *** simulation results show that IVDE algorithm can cut down the test cost with the satisfied *** with the other algorithms such as particle swarm optimization(PSO)and genetic algorithm(GA),IVDE can get better solution to OTP.

关键词： Differential evolution(DE) evolutionary computation fault isolation rate(FIR) testability fault diagnosis

Data-driven facial animation based on manifold Bayesian regression

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第4期7卷 556-563页

作者： WANG yu-shun ZHUANG yue-ting WU Fei School of Computer Science and Technology Zhejiang University Hangzhou 310027 China The Microsoft State Education Ministry Key Laboratory Zhejiang University Hangzhou 310027 China

Driving facial animation based on tens of tracked markers is a challenging task due to the complex topology and to the non-rigid nature of human faces. We propose a solution named manifold Bayesian regression. First a novel distance metric, the geodesic manifold distance, is introduced to replace the Euclidean distance. The problem of facial animation can be formulated as a sparse warping kernels regression problem, in which the geodesic manifold distance is used for modelling the topology and discontinuities of the face models. The geodesic manifold distance can be adopted in traditional regression methods, e.g. radial basis functions without much tuning. We put facial animation into the framework of Bayesian regression. Bayesian approaches provide an elegant way of dealing with noise and uncertainty. After the covariance matrix is properly modulated, Hybrid Monte Carlo is used to approximate the integration of probabilities and get deformation results. The experimental results showed that our algorithm can robustly produce facial animation with large motions and complex face models.

关键词： Facial animation Manifold Geodesic distance Bayesian regression