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Quantum K-theory and q-difference Equations

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Acta Mathematica Sinica,English Series 2022年第10期38卷 1677-1704页

作者： yong Bin ruan Yao Xiong WEN Institute of Advanced Study for Mathematics Zhejiang UniversityHangzhou 310058P.R.China Korea Institute for Advanced Study 85 HoegiroDongdaemun-guSeoul02455Republic of Korea

This is a set of lecture notes for the first author’s lectures on the difference equations in2019 at the Institute of Advanced Study for Mathematics at Zhejiang *** focus on explicit computations and *** convergence ... 详细信息

关键词： Quantum K-theory q-difference equation

Crossing experiments and behavioral observations reveal reproductive incompatibility among three putative species of the whitefly Bemisia tabaci

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Insect Science 2010年第6期17卷 508-516页

作者： Peng Wang yong-Ming ruan Shu-Sheng Liu Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects Institute of Insect Sciences Zhejiang University Hangzhou College of Chemistry and Life Sciences Zhejiang Normal University Jinhua Zhejiang Province China

The whitefly Bemisia tabaci has a global distribution and extensive genetic diversity. Recent phylogenetic analyses as well as crossing experiments suggest that B. tabaci is a complex composed of 〉 20 cryptic species, but more crossing studies are required to examine the reproductive compatibility among the putative species and thus further clarify the systematics of this species complex. We conducted crossing experiments and behavioral observations to investigate the reproductive compatibility between the Mediterranean, Asia II 3, and Asia II 1 putative species ofB. tabaci collected from Zhejiang, China. Female progeny were never produced in inter-species crosses, demonstrating a lack of egg fertilization; while 55%-75% females were produced in all the intra-species treatments. Continuous behavioral observations showed that frequent courtship events occurred in both intra-species treatments and inter-putative species crosses. However, copulation events occurred only in the three intra-species treatments with one exception： that one copulation event occurred between Asia II 3 and Mediterranean in the crosses where two cohorts of females and males of different putative species were enclosed together in a small arena but were not allowed access to their intra-specific mates for a long period of time. These data demonstrated complete reproductive isolation between the Mediterranean, Asia II 3, and Asia II 1 putative species, and further showed that the isolation is due to lack of copulation. Demonstration of reproductive isolation between the Mediterranean and two indigenous putative species from China provides further evidence for the existence of cryptic species within the B. tabaci complex.

关键词： Bemisia tabaci behavioral observations crossing experiments genetic groups putative species reproductive incompatibility

Symplectic Blowing Down in Dimension Six

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Acta Mathematica Sinica,English Series 2022年第10期38卷 1831-1855页

作者： Tian-Jun LI yong Bin ruan Wei Yi ZHANG School of Mathematics University of MinnesotaMinneapolisMN 55455USA Institute for Advanced Study in Mathematics East No.7 BuildingZhejiang University Zijingang CampusHangzhou 310058P.R.China Mathematics Institute University of WarwickCoventryCV47ALUK

We establish a blowing down criterion in the context of birational symplectic geometry in dimension 6.

关键词： Symplectic birational geometry symplectic blowing down

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Molecular regulation of sucrose catabolism and sugar transport for development~ defence and phloem function

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Journal of Integrative Plant Biology 2017年第5期59卷 322-335页

作者： Jun Li Limin Wu Ryan Foster yong-Ling ruan Australia-China Research Centre for Crop Improvement and School of Environmental and Life Sciences The University of NewcastleNSW 2308 Australia CSIRO Agriculture Canberra ACT 26oi Australia

Sucrose （Suc） is the major end product of photosynthesis in mesophyll cells of most vascular plants. It is loaded into phloem of mature leaves for long-distance translocation to non-photosynthetic organs where it is unloaded for diverse uses. Clearly, Suc transport and metabolism is central to plant growth and development and the functionality of the entire vascular system. Despite vast information in the literature about the physiological roles of individual sugar metabolic enzymes and transporters, there is a lack of systematic evaluation about their molecular regulation from transcriptional to post-translational levels. Knowledge on this topic is essential for understanding and improving plant development, optimizing resource distri- bution and increasing crop productivity. We therefore focused our analyses on molecular control of key players in Suc metabolism and transport, including：（i） the identifica- tion of promoter elements responsive to sugars and hormones or targeted by transcription factors and micro- RNAs degrading transcripts of target genes; and （ii） modulation of enzyme and transporter activities through protein-protein interactions and other post-translational modifications. We have highlighted major remaining questions and discussed opportunities to exploit current understanding to gain new insights into molecular control of carbon partitioning for improving plant performance.

关键词： William J. Lucas University of California Davis USA

BO_(2)-F^(+)Centers in the Radiation-damaged YCOB Crystals

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Chinese Physics Letters 2000年第12期17卷 896-898页

作者： ruan yong-Feng Hiroshi NAKAO Takatomo SASAKI Department of Physics Tianjin UniversityTianjin 300072 Department of Electrical Engineering Osaka UniversityOsaka 565-0871Japan

An intense paramagnetic EPR signal generated from x-ray-irradiated,powdered YCOB crystals was observed at the liquid nitrogen temperature for the first *** peaks,located at the positions where the effective g factor equals to 1.992,1.986,1.980,1.974 and 1.965,labeled as A,B,C,D and E respectively,were *** is believed that the peaks A,B,C and D generated from the BO_(2)-F^(+)center which is a single electron trapped in an oxygen vacancy which was originally occupied by an O^(2-)ion bonded to a(BO3)^(3-)anion *** peak E is thought of coming from Y2+ions that are formed by the Y^(3+) ions trapping *** mechanism for the formation of the radiation-induced defects in the YCOB crystals is suggested.

关键词： Crystal occupied trapping

Phase Behavior and Interfacial Properties of Diblock Copolymer- Homopolymer Ternary Mixtures： Influence of Volume Fraction of Copolymers and Interaction Energy

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Chinese Journal of Polymer Science 2017年第7期35卷 874-886页

作者： Jian Wang Jian-hui Song 卢宇源 yong-jin ruan Li-jia An State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China University of Chinese Academy of Sciences Beijing 100049 China School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao 266042 China

We use a Monte Carlo method to study the phase and interracial behaviors of A-b-B diblocks in a blend of homopolymers, A and B, which are confined between two asymmetric hard and impenetrable walls. Our results show that, when the interaction strength is weak, the block copolymers are uniformly distributed in the ternary mixtures under considered concentrations. Under strong interaction strength, distribution region of the block copolymers changes from a single smooth interface to a curved interface or multi-layer interface in the ternary mixtures. Furthermore, our findings show that with increasing volume fraction of A-b-B diblock copolymer （φc）, copolymer profiles broaden while φc ≥ 0.4, a lamellar phase is formed and by further increasing φc, more thinner layers are observed. Moreover, the results show that, with the increase of φc, the phase interface first gradually transforms from plane to a curved surface rather than micelle or lamellar phase while with the increase of the interaction between A and B segments （CAB）, the copolymer chains not only get stretched in the direction perpendicular to the interface, but also are oriented. The simulations also reveal that the difference between symmetric and asymmetric copolymers is negligible in statistics if the lengths of two blocks are comparable.

关键词： Ternary mixtures Phase behavior Interfacial property Copolymer compatibilizers Monte Carlo simulation

Handling Multiple Objectives with Biogeography-based Optimization

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International Journal of Automation and computing 2012年第1期9卷 30-36页

作者： Hai-Ping Ma Xie-yong ruan Zhang-Xin Pan Department of Physics and Electrical Engineering Shaoxing UniversityShaoxing 312000PRC

Biogeography-based optimization （BBO） is a new evolutionary optimization method inspired by biogeography. In this paper, BBO is extended to a multi-objective optimization, and a biogeography-based multi-objective optimization （BBMO） is introduced, which uses the cluster attribute of islands to naturally decompose the problem. The proposed algorithm makes use of nondominated sorting approach to improve the convergence ability efficiently. It also combines the crowding distance to guarantee the diversity of Pareto optimal solutions. We compare the BBMO with two representative state-of-the-art evolutionary multi-objective optimization methods, non-dominated sorting genetic algorithm-II （NSGA-II） and archive-based micro genetic algorithm （AMGA） in terms of three metrics. Simulation results indicate that in most cases, the proposed BBMO is able to find much better spread of solutions and converge faster to true Pareto optimal fronts than NSGA-II and AMGA do.

关键词： Multi-objective optimization biogeography-based optimization (BBO) evolutionary algorithms Pareto optimal nondominated sorting.

Exploring Nonlinear Rheological Behaviors in Entangled Semi-flexible Polymer Melts

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Chinese Journal of Polymer Science 2024年第11期42卷 1811-1823,I0014页

作者： Li-Cheng Ma yong-Jin ruan Zhen-Hua Wang Yu-Yuan Lu Li-Jia An State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China

This study utilizes molecular dynamics simulation to investigate the complex dynamics of entangled semi-flexible polymer *** investigation reveals a significant stress overshoot phenomenon in the systems,demonstrating the intricate interplay between shear rates,chain orientation,and chain stretching ***,the identification of metastable states,characterized by a dual-plateau phenomenon in the shear stress-strain curve at specific Rouse-Weissenberg number Wi_(R),showcases the system’s responsiveness to external perturbations and its transition to stable shear banding ***,the analysis of flow field deviations uncovers a progression of shear bands with increasing Wi_(R),displaying distinct behaviors in the system’s dynamics under different shear rates and chain *** findings challenge established theoretical frameworks and advocate for refined modelling approaches in polymer rheology research.

关键词： Semi-flexible polymer melts Molecular dynamics simulation Stress overshoot Shear banding Entanglement

Live Long and Prosper：. Roles of Sugar and Sugar Polymers in Seed Vigor

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Molecular Plant 2018年第1期11卷 1-3页

作者： Lu Wang John W. Patrick yong-Ling ruan School of Biotogicat Sciences University of Tasmania Hobart TAS Australia School of Environmental and Life Sciences University of Newcastle Newcastle NSW Australia

Seed vigor refers to the overall capacity of the seed to （1） germi- nate and emerge after sowing （i.e., germination vigor） and （2） retain this potential during postharvest storage, known as seed longevity. Seed vigor plays vital roles in plant growth and realiza- tion of crop productivity. Long shelf life of seeds and their rapid and uniform germination and seedling emergence are highly desirable commercial traits. Despite its central importance, how seeds acquire their vigor is poorly understood.

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