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Unveiling an ancient whole-genome duplication event in Stentor,the model unicellular eukaryotes

Science china Life Sciences 2025年

作者： Weibo Zheng Chao Li Zhaorui Zhou Xiao Chen Michael Lynch Ying Yan School of Life Sciences Ludong University Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education) and Institute of Evolution & Marine Biodiversity Ocean University of China Biodesign Center for Mechanisms of Evolution Arizona State University Marine College Shandong University

Whole-genome duplication(WGD) events are widespread across eukaryotes and have played a significant role in moulding the genetic architectures of diverse organisms. In the present study, the newly sequenced genome of a giant ciliated protist, Stentor roeselii, provides an opportunity for the analysis of the collinearity and retention of reciprocal best-hit genes between two Stentor species. As a main result, we have unveiled a previously undetected ancient WGD event shaping the genome of its congener, Stentor coeruleus, a model protist used in cytological and evolutionary studies. Genomes of two congeners, S. coeruleus and S. roeselii, are compared and analyzed, revealing that:(i)the former exhibits a much higher retention rate of colinear-gene pairs(28%) than does S. roeselii, and in S. coeruleus, 75% of genes that have a RBH hit in S. roeselii, have paralogs with high amino-acid identity, consistent with a WGD event in the lineage leading to S. coeruleus;(ii) the S. roeselii genome possesses extremely short intergenic regions, implying that the lengths of intergenic regions are under strong selection;(iii) the unique characteristics of introns may have been shaped in the common ancestor of heterotrichs;(iv) gene families that play a role in activities of multiple protein kinases and voltage-gated ion channels expanded rapidly in the ancestor of both taxa, possibly relating to the remarkable regenerative ability in Stentor. This study offers new insights into the evolutionary dynamics of ciliate genomes,with implications for understanding of the processes underlying the evolution of genomic complexity.

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“One stone, two birds”: Salt template enabling porosity engineering and single metal atom coordinating toward high-performance zinc-ion capacitors

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Journal of Energy Chemistry 2025年第1期 637-645页

作者： Chunliu Zhu Huanyu Liang Ping Li Chenglong Qiu Jingyi Wu Jingwei Chen Weiqian Tian Yue Zhu Zhi Li Huanlei Wang School of Materials Science and Engineering Ocean University of China Department of Chemical and Materials Engineering University of Alberta

Zinc-ion hybrid capacitors （ZIHCs） have received increasing attention as energy storage devices owing to their low cost,high safety,and environmental ***,their progress has been hampered by low energy and power density,as well as unsatisfactory long-cycle stability,mainly due to the lack of suitable electrode *** this context,we have developed manganese single atoms implanted in nitrogen-doped porous carbon nanosheets （MnSAs/NCNs） using a metal salt template method as cathodes for *** metal salt serves a dual purpose in the synthesis process:It facilitates the uniform dispersion of Mn atoms within the carbon matrix and acts as an activating agent to create the porous *** applied in ZIHCs,the MnSAs/NCNs electrode demonstrates exceptional performance,including a high capacity of 203 m Ah g-1,an energy density of 138 Wh kg-1at 68 W kg-1,and excellent cycle stability with 91%retention over 10,000 *** calculations indicate that the introduced Mn atoms modulate the local charge distribution of carbon materials,thereby improving the electrochemical *** work demonstrates the significant potential of carbon materials with metal atoms in zinc-ion hybrid capacitors,not only in enhancing electrochemical performance but also in providing new insights and methods for developing high-performance energy storage devices.

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SVM strategy and analysis of a three-phase quasi-Z-source inverter with high voltage transmission ratio

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Science china(Technological Sciences) 2023年第10期66卷 2996-3010页

作者： CHEN DaoLian ZHAO JiaWei QIN ShuRan School of Electrical Engineering Qingdao UniversityQingdao 266071China

Herein,we propose a novel three-phase quasi-Z-source inverter with a high voltage transmission ratio to address challenges such as high switching loss and sizeable magnetic components in the basic quasi-Z-source *** proposed circuit topology,control strategy,and related analysis are *** circuit topology of the inverter comprises a quasi-Z-source network with an integrated magnetic inductor,an active clamp circuit,a three-phase inverter bridge,and an output LC filter,all of which are connected in *** improved 12-sector space vector modulation scheme is proposed based on the root-mean-square value of the voltage and the instantaneous value of the ***,analyses of the inverter voltage transmission ratio,resonant process,and parametric design guidelines for integrated magnetic inductor and zero-voltage switching conditions are *** results on a 1-kVA prototype inverter demonstrate that the proposed inverter exhibits a higher transmission ratio and efficiency than existing inverters;thus,the proposed inverter would have broad prospects in low-voltage DC-AC applications.

关键词： quasi-Z-source inverter three-phase inverter zero-voltage-switching magnetically integrated inductor space vector modulation

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Sufficient conditions and limitations of equivalent partition in multiagent controllability

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Science china(Information Sciences) 2022年第3期65卷 152-166页

作者： Junhao GUO Zhijian JI Yungang LIU shandong Key Laboratory of Industrial Control Technology Institute of Complexity ScienceCollege of Automation Qingdao University School of Control Science and Engineering Shandong University

The emergence of the graphical characterization of multiagent controllability has raised several issues concerning how to directly establish controllability from topology structures. Arguably, one of the most serious challenges to this research field is the means through which equivalent partition, which plays an important role in graphical characterization, obtains sufficient controllability conditions; hence, how equivalent partition influences controllability has garnered considerable attention. This article specifically focuses on the sufficient conditions and limitations of equivalent partition in multiagent controllability. We provide two sufficient conditions:(i) the absence of the system matrix’s eigenvectors that make the equation formed by the eigenvalues and eigenvectors hold and(ii) the addition of leaders by reducing the same number of followers. The first condition particularly exhibits a relation between two apparently unrelated parts: Tao’s equation and controllability. We further propose a necessary and sufficient condition for controllability under n-node graphs(n 5) by taking advantage of iso-neighbor nodes, and analyze the resulting difficulties when n is greater than 5. Immediate corollaries of our results are obtained. Finally, we reveal the limitation of equivalent partition in controllability analysis. Several constructive examples demonstrate our results.

关键词： multiagent system controllability equivalent partition Tao’s equation graph theory

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iTRAQ-based analysis of 17β-estradiol induced proteome in Chinese tongue sole Cynoglossus semilaevis

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Journal of Oceanology and Limnology 2019年第5期37卷 1659-1668页

作者： ZHU Ying LI Yangzhen LI Hailong WANG Lei ZHANG Ning LIU Yang MENG Liang XU Xiwen DONG Zhongdian WEI Min GUO Hua CUI Zhongkai LI Xihong SHAO Changwei XU Wenteng Key Laboratory of Sustainable Development of Marine Fisheries Ministry of AgricultureYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Research Institute of Metabolic Disease Qingdao UniversityQingdao 266003China

The phenomenon of sex dimorphism prevails among many fi sh species. It has attracted the general research interest due to its close relationship to fi sh growth and thus aquaculture productivity. In Chinese tongue sole ( Cynoglossus semilaevis ), 17β-estradiol (E2) can be used reportedly to induce the feminization of fi sh, although the detailed regulatory network remained elusive. We treated the tongue sole fry before sex diff erentiation with E2 (10 and 30 μg/L) to identify potential targets of E2 in Chinese tongue sole. The E2 treatment indeed induced genetic male fi sh sex-reversal to phenotypic female. Using an iTRAQ-based comparative proteomic analysis, 409 proteins that diff erentially expressed after E2 induction were identifi ed, including 259 up-regulated and 150 down-regulated proteins. Furthermore, 19 diff erentially expressed proteins identifi ed in the comparative proteomic analysis were selected to assess their transcription and eight of them exhibited the same tendency. Functions of the eight proteins included mainly nucleotide and protein binding. Interestingly, a far upstream element-binding protein 3-like isoform exhibited the signifi cant upregulation both at transcription and translation levels after E2 treatment. This work identifi ed a set of candidate proteins for E2 response and deepened our understanding of E2 regulatory mechanism.

关键词： Cynoglossus semilaevis 17β-estradiol sex reversal proteome iTRAQ analysis

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Controllability of General Linear Discrete Multi-Agent Systems with Directed and Weighted Signed Network

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Journal of Systems Science & Complexity 2022年第6期35卷 2107-2130页

作者： ZHAO Lanhao JI Zhijian LIU Yungang LIN Chong Institute of Complexity Science College of AutomationQingdao UniversityQingdao 266071China shandong Key Laboratory of Industrial Control Technology Qingdao UniversityQingdao 266071China School of Control Science and Engineering Shandong UniversityJinan 250061China Institute of Complecity Science College of AutomationQingdao UniversityQingdao 266071China

This paper investigates the controllability of general linear discrete-time multi-agent systems with directed and weighted signed networks by using graphic and algebraic *** nondelay and delay cases are considered *** the case of no time delay,the upper bound condition of the controllable subspace is given by using the equitable partition method,and the influence of coefficient matrix selection of individual dynamics is *** the case of single delay and multiple delays,the equitable partition method is extended to deal with time-delay systems,and some conclusions are *** particular,some simplified algebraic criteria for controllability of systems with time delay are obtained by using augmented system method and traditional algebraic controllability criteria.

关键词： Controllability equitable partition multi-agent system signed network time-delays

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Second harmonic generation from precise diamond blade diced ridge waveguides

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Chinese Physics B 2022年第9期31卷 340-345页

作者： Hui Xu Ziqi Li Chi Pang Rang Li Genglin Li ShAkhmadaliev Shengqiang Zhou Qingming Lu Yuechen Jia Feng Chen School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore Institute of Ion Beam and Materials Research Helmholtz-Zentrum Dresden-RossendorfDresden 01314Germany School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100China

Carbon ion irradiation and precise diamond blade dicing are applied to fabricate Nd∶GdCOB ridge *** propagation properties of the fabricated Nd∶GdCOB waveguides are investigated through experiments and theoret-ical ***-Raman analysis reveals that the Nd∶GdCOB crystal lattice expands during the irradiation ***-second harmonic spectroscopic analysis suggests that the original nonlinear properties of the Nd∶GdCOB crystal are greatly enhanced within the waveguide *** pulsed 1064 nm laser pumping,second harmonic generation(SHG)at 532 nm has been achieved in the fabricated *** maximum SHG conversion efficiencies are determined to be~8.32%·W^(-1) and~22.36%·W^(-1) for planar and ridge waveguides,respectively.

关键词： optical waveguides Nd:GdCOB crystal second harmonic generation

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Strong Structural Controllability Based on Leader-Follower Framework

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Journal of Systems Science & Complexity 2023年第4期36卷 1498-1518页

作者： QI Wei JI Zhijian LIU Yungang LIN Chong Insitute of Complexity Science College of AutomationQingdao UniversityQingdao 266071China shandong Key Laboratory of Industrial Control Technology Qingdao UniversityQingdao 266071China School of Control Science and Engineering Shandong UniversityJinan 250061China

In this paper,the strong structural controllability of the leader-follower framework is ***,the authors analyze different edge augmentation methods to preserve the strong structural controllability of the path-bud *** following four cases are considered:Adding edges from the path to the bud;adding edges from the bud to the path;adding the reverse or forward edges to the path or bud;and adding both the reverse and forward edges to the path or *** sufficient conditions are derived for the strong structural controllability of the new topologies which are generated by adding different *** addition,it is proved that rank[A B]=n is a necessary condition for the strong structural ***,three examples are given to verify the effectiveness of the main results.

关键词： Edge augmentation leader-follower framework path-bud topology strong structural controllability

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Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content

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International Journal of Coal Science & Technology 2023年第4期10卷 62-76页

作者： Xuebin Li Xuesheng Liu Yunliang Tan Ai Chen Honglei Wang Xin Wang Shenglong Yang College of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Mining Disaster Prevention and Control Shandong University of Science and TechnologyQingdao 266590China Ningxia Coal Industry Co. Ltd.of China Energy GroupYinchuan 750000China Badong National Observation and Research Station of Geohazards China University of GeosciencesWuhan 430074China

Rheological mechanical properties of the soft rock are afected signifcantly by its main physical characteristics-clay *** this study,taking the mudstone on the roof and foor in four typical mining regions as the research object,frstly,the clay mineral characteristic was analyzed by the X-ray difraction ***,rheological mechanical properties of mudstone samples under diferent confning pressures are studied through triaxial compression and creep *** results show that the clay mineral content of mudstone in diferent regions is diferent,which leads to signifcant diferences in its rheological properties,and these diferences have a good correlation with the content of montmorillonite and illite-montmorillonite mixed *** the montmorillonite content as an example,compared with the sample with 3.56%under the lower stress level,the initial creep deformation of the sample with 11.19%increased by 3.25 times,the viscosity coefcient and longterm strength decreased by 80.59%and 53.94%,***,based on the test results,the damage variation is constructed considering the montmorillonite content and stress level,and the M–S creep damage constitutive model of soft rock is ***,the test results can be ftted with determination coefcients ranging from 0.9020 to 0.9741,which proves that the constitutive relation can refect the infuence of the clay mineral content in the samples *** study has an important reference for revealing the long-term stability control mechanism of soft rock roadway rich in clay minerals.

关键词： Clay mineral Physical characteristic Creep Damage Constitutive model

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Nanoparticle stabilized emulsion with surface solidification for profile control in porous media

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Petroleum Science 2022年第2期19卷 800-808页

作者： Yi-Ning Wu Xiang Yan Ke Xu Ruo-Yu Wang Meng-Jiao Cao Xiao-Da Wang Yuan Li Cai-Li Dai shandong Key Laboratory of Oilfield Chemistry School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao266580PR China Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Ministry of EducationQingdao266580PR China Department of Energy and Resources Engineering College of EngineeringPeking UniversityBeijing100871China Dongxin Oil Production Plant Shengli Oilfield CompanySINOPECDongying257000China College of Chemical Engineering Fuzhou UniversityFuzhou350116China

Profile control is utilized to redirect the injection water to low permeability region where a large amount of crude oil *** gel particles are the commonly used agent for redistributing water by blocking the pores in high permeability *** the capability of deep penetration of performed gel particles is ***,we formulate nanoparticle stabilized emulsion(NSE).The stability and the effect of NSE on the fluid redirection in a three-dimensional porous medium were *** usingμ-PIV(particle image velocimetry),it was found that the velocity gradient of continuous fluid close to the nanoparticle stabilized droplets is much higher than that close to surfactant stabilized *** behaves as solid particle in preferential seepage channels,which will decrease effectively the permeability,thereby redirecting the subsequent injection ***,NSE shows high stability compared with emulsion stabilized by surfactant in static and dynamic *** addition,water flooding tests also confirm that the NSE can significantly reduce the permeability of porous media and redirect the fluid *** results demonstrate NSE owns high potential to act as profile control agent in deep formation.

关键词： Nanoparticles Emulsion stability Flow behavior Coalescence Profile control

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