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Second-order correlated interference with multi-wavelength thermal-light beams
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作者 De-Sheng Wang Yi-Ning Zhao +5 位作者 Lingxin Kong Su-Heng Zhang Chong Wang Cheng Ren Yuehua Su De-Zhong Cao 《Chinese Physics B》 2026年第2期374-382,共9页
A method for correlating thermal light over a wide spectral range is proposed.A multi-wavelength pseudothermal source,prepared by projecting laser beams of multiple wavelengths(650 nm,635 nm,532 nm,and 473 nm)onto a m... A method for correlating thermal light over a wide spectral range is proposed.A multi-wavelength pseudothermal source,prepared by projecting laser beams of multiple wavelengths(650 nm,635 nm,532 nm,and 473 nm)onto a moving thin ground glass plate,is employed in a double-slit interference experiment.The ground glass plate induces random phase differences between light beams of different wavelengths passing through it.This initial random phase difference significantly influences the high-order intensity correlation functions of multi-wavelength thermal beams.Experimentally,second-order correlated interference patterns,including subwavelength interference,of pseudothermal beams with different wavelengths are observed in the intensity correlation measurements.This method facilitates applications of correlated thermal photons in quantum information processing and quantum imaging. 展开更多
关键词 correlated interference multi-wavelength thermal light second-order correlation function
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A Fine-Grained RecognitionModel based on Discriminative Region Localization and Efficient Second-Order Feature Encoding
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作者 Xiaorui Zhang Yingying Wang +3 位作者 Wei Sun Shiyu Zhou Haoming Zhang Pengpai Wang 《Computers, Materials & Continua》 2026年第4期946-965,共20页
Discriminative region localization and efficient feature encoding are crucial for fine-grained object recognition.However,existing data augmentation methods struggle to accurately locate discriminative regions in comp... Discriminative region localization and efficient feature encoding are crucial for fine-grained object recognition.However,existing data augmentation methods struggle to accurately locate discriminative regions in complex backgrounds,small target objects,and limited training data,leading to poor recognition.Fine-grained images exhibit“small inter-class differences,”and while second-order feature encoding enhances discrimination,it often requires dual Convolutional Neural Networks(CNN),increasing training time and complexity.This study proposes a model integrating discriminative region localization and efficient second-order feature encoding.By ranking feature map channels via a fully connected layer,it selects high-importance channels to generate an enhanced map,accurately locating discriminative regions.Cropping and erasing augmentations further refine recognition.To improve efficiency,a novel second-order feature encoding module generates an attention map from the fourth convolutional group of Residual Network 50 layers(ResNet-50)and multiplies it with features from the fifth group,producing second-order features while reducing dimensionality and training time.Experiments on Caltech-University of California,San Diego Birds-200-2011(CUB-200-2011),Stanford Car,and Fine-Grained Visual Classification of Aircraft(FGVC Aircraft)datasets show state-of-the-art accuracy of 88.9%,94.7%,and 93.3%,respectively. 展开更多
关键词 Fine-grained recognition feature encoding data augmentation second-order feature discriminative regions
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Resilience and risk management in railway supply chains:the interplay of leadership,innovation and competitive advantage
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作者 Meisam Karami 《Railway Sciences》 2026年第1期117-135,共19页
Purpose-This study explores how managerial leadership and organizational innovation interact to enhance resilience and risk management in railway supply chains and how these capabilities contribute to sustained compet... Purpose-This study explores how managerial leadership and organizational innovation interact to enhance resilience and risk management in railway supply chains and how these capabilities contribute to sustained competitive advantage.It emphasizes the strategic importance of resilience in railway systems that face operational complexity,regulatory pressures and increasing exposure to systemic risks.Design/methodology/approach-A mixed-methods design was employed,integrating survey data from 186 railway organizations with six case studies involving railway operators,rolling stock manufacturers and supply chain partners across multiple regions.Constructs were measured using validated scales and hypothesized relationships were tested using Structural Equation Modeling(SEM).Case study interviews were analyzed thematically to provide contextual understanding of leadership practices and innovation strategies.Findings-The results confirm that transformational managerial leadership significantly predicts innovation adoption,which in turn strengthens resilience and risk management capabilities.Resilience emerged as a powerful driver of competitive advantage,reinforcing its role as a strategic capability rather than a reactive response to disruptions.Furthermore,innovation was shown to partially mediate the relationship between leadership and resilience,highlighting its function as the operational channel through which vision translates into capability.Originality/value-This study contributes to the literature by integrating the Resource-Based View(RBV)and Dynamic Capabilities(DC)framework into the context of railway supply chains.It is among the first to empirically validate the mediating role of innovation between leadership and resilience,offering both theoretical advancements and actionable strategies for building resilient and competitive railway systems. 展开更多
关键词 Railway supply chains RESILIENCE Risk management LEADERSHIP INNOVATION Competitive advantage
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Preparation of low-expansion high-performance Si-C composites based on porous advantage of detoxified and purified waste cathode graphite blocks
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作者 Guoqing Yu Mingzhuang Xie +4 位作者 Zhihao Zheng Zegang Wu Yi Wang Hongliang Zhao Fengqin Liu 《International Journal of Minerals,Metallurgy and Materials》 2026年第2期716-726,共11页
Waste graphitization cathode carbon blocks are a type of hazardous solid waste generated during the aluminum electrolysis process,and their proper disposal is a key step in the resource utilization of discarded graphi... Waste graphitization cathode carbon blocks are a type of hazardous solid waste generated during the aluminum electrolysis process,and their proper disposal is a key step in the resource utilization of discarded graphite.This study utilizes the porous“defect advantage”of a cathode carbon block matrix to prepare silicon-doped and asphalt-coated detoxified and purified waste graphitization cathode carbon blocks for use as high-performance silicon/carbon composite anode materials.The results show that the uniformly silicondoped silicon/carbon composite material features a unique amorphous carbon-encapsulated“locked silicon”structure,which effectively addresses issues such as cathode volume expansion,excessive growth of the solid electrolyte interphase(SEI)film,and poor electrical contact between active materials.Consequently,electrochemical performance is enhanced.After assembly in a half-cell,the PSCC/10%Si@C(purified waste graphitization cathode carbon/10%Si@C)material exhibits optimal electrochemical stability,with an initial charging specific capacity of 514.5 mAh/g at 0.1 C(1 C=170 mA/g)and a capacity retention rate of 95.1%after 100 cycles.At a charge rate of 2.0 C,a specific capacity of 216.9 mAh/g is achieved.This technology provides a new pathway for the economical and high-value utilization of waste cathode carbon blocks and the development of low-cost,high-performance anode materials. 展开更多
关键词 waste graphitization cathode carbon blocks defect advantage silicon/carbon anode materials hazardous waste resource util-ization
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基于D-Wave Advantage量子退火算法的90比特RSA整数分解研究
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作者 洪春雷 裴植 王潮 《计算机学报》 北大核心 2025年第7期1733-1748,共16页
业内认为在当前量子计算攻击密码整体进展缓慢背景下,RSA整数分解进展每提升1比特都面临挑战。根据《Nature》文章报道,2019~2023年谷歌不断改进其量子芯片,但依旧不能用于密码破译。谷歌等公司近期的研究表明:尽管亚线性量子资源方法分... 业内认为在当前量子计算攻击密码整体进展缓慢背景下,RSA整数分解进展每提升1比特都面临挑战。根据《Nature》文章报道,2019~2023年谷歌不断改进其量子芯片,但依旧不能用于密码破译。谷歌等公司近期的研究表明:尽管亚线性量子资源方法分解RSA整数可以降低量子资源的消耗,但是即使“完美的量子优化算法+Babai算法”也不足以有效地分解80比特以上的RSA整数。量子退火算法凭借其独特的量子隧穿效应,可跳出传统智能优化算法极易陷入的局部极值,快速逼近全局最优解。鉴于D-Wave Advantage的量子资源已达到5000+量子比特,本文通过使用更多的量子资源,提出一种量子退火算法结合经典密码算法分解RSA整数的混合架构。通过提高最近向量问题(Closest Vector Problem,CVP)的规模,从而提升搜索用于分解80比特以上RSA整数光滑对的能力;本文使用Block Korkin-Zolotarev(BKZ)算法对CVP的格基进行约化,获得较LLL算法更优的归约基。利用更优的归约基,Babai算法可以获得更优的CVP的解。在此基础上,本文利用量子退火算法的隧穿效应进一步优化Babai算法对CVP的求解,获得较Babai算法更优的解,从而提高光滑对的搜索效率,加速RSA整数分解。最后,本文在D-Wave Advantage上首次完成量子计算分解80比特以上的RSA整数,最大分解90比特RSA整数:629367860625666765619139989=6398047085669×98368744743281,大幅度超出富士通、洛克希德马丁公司、普渡大学的实验指标。实验结果表明:研究量子智能算法和量子位数较多的量子计算机攻击密码是有意义的,未来需要重视量子隧穿推进CVP等NP难题求解的潜力,其全局寻优能力可能成为密码攻击的关键。 展开更多
关键词 RSA整数 Block Korkin-Zolotarev算法 Babai算法 最近向量问题 量子退火 D-Wave advantage
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Research on the Advantages,Shortcomings,and Countermeasures of Current Higher TCM Education
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作者 Heguo Yan Niqing Xiao +7 位作者 Sanjin Zeng Bo Yang Bingbing Chen He Qian Xiaoyu Zhang Zhaohu Xie Jing Xie Zhaofu Li 《Journal of Contemporary Educational Research》 2025年第5期107-114,共8页
Traditional Chinese Medicine(TCM)is a treasure of China’s traditional medical heritage,embodying the wisdom and cultural depth of the Chinese nation.Higher TCM education shoulders the important responsibility of pres... Traditional Chinese Medicine(TCM)is a treasure of China’s traditional medical heritage,embodying the wisdom and cultural depth of the Chinese nation.Higher TCM education shoulders the important responsibility of preserving and advancing TCM,and in today’s context,it offers significant advantages while also facing numerous challenges.Among its strengths are a profound cultural foundation in TCM,utilizing classic texts and unique theories to cultivate students’TCM thinking and competence;diversified teaching methods that integrate knowledge from multiple disciplines,innovate instructional models,and combine traditional with modern educational approaches;a complete teaching system characterized by professional faculty and advanced facilities;and interdisciplinary integration fostering innovation.However,problems persist,including some students lacking confidence in TCM culture due to the influence of Western medicine concepts and the westernization of the educational model;weak practical teaching where theory dominates,practice time is limited,and there are insufficient bases and instructors;and a shortage of faculty resulting in an imbalanced student-to-teacher ratio and an unreasonable structure.To address these issues,it is recommended to enhance cultural confidence,strengthen faculty development,and optimize practical teaching,thereby promoting the sustainable development of higher TCM education and achieving the shared prosperity of TCM education and the TCM profession. 展开更多
关键词 Higher TCM education advantages SHORTCOMINGS STRATEGIES RESEARCH
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Advantages and Application Prospects of Traditional Chinese Medicine Granules
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作者 Xiaohua Sun 《Proceedings of Anticancer Research》 2025年第1期8-13,共6页
With the advancement of the modernization of traditional Chinese medicine(TCM),TCM granules have emerged and garnered widespread attention.This study provides a comprehensive review of the development of TCM granules,... With the advancement of the modernization of traditional Chinese medicine(TCM),TCM granules have emerged and garnered widespread attention.This study provides a comprehensive review of the development of TCM granules,analyzing their characteristics in terms of ease of use,quality stability,and pharmacodynamic advantages.It also explores their broad application prospects in clinical TCM treatment and preventive healthcare.Through an integrative analysis of relevant research literature,the study highlights the significant value and vast development potential of TCM granules in modern medicine.The article aims to offer valuable references for the modernization and internationalization of TCM while promoting the continuous development and innovative application of TCM granules in the field of traditional Chinese medicine. 展开更多
关键词 TCM granules advantages Clinical application Preventive healthcare
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Dynamic Relative Advantage-Driven Multi-Fault Synergistic Diagnosis Method for Motors under Imbalanced Missing Data Rates
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作者 Zhenpeng Teng Xiaojian Yi Biao Wang 《Journal of Dynamics, Monitoring and Diagnostics》 2025年第2期111-120,共10页
Missing data handling is vital for multi-sensor information fusion fault diagnosis of motors to prevent the accuracy decay or even model failure,and some promising results have been gained in several current studies.T... Missing data handling is vital for multi-sensor information fusion fault diagnosis of motors to prevent the accuracy decay or even model failure,and some promising results have been gained in several current studies.These studies,however,have the following limitations:1)effective supervision is neglected for missing data across different fault types and 2)imbalance in missing rates among fault types results in inadequate learning during model training.To overcome the above limitations,this paper proposes a dynamic relative advantagedriven multi-fault synergistic diagnosis method to accomplish accurate fault diagnosis of motors under imbalanced missing data rates.Firstly,a cross-fault-type generalized synergistic diagnostic strategy is established based on variational information bottleneck theory,which is able to ensure sufficient supervision in handling missing data.Then,a dynamic relative advantage assessment technique is designed to reduce diagnostic accuracy decay caused by imbalanced missing data rates.The proposed method is validated using multi-sensor data from motor fault simulation experiments,and experimental results demonstrate its effectiveness and superiority in improving diagnostic accuracy and generalization under imbalanced missing data rates. 展开更多
关键词 data missing motor fault relative advantage synergistic diagnosis
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Decoding Quantum Search Advantage:The Critical Role of State Properties in Random Walks
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作者 Si-Qi Zhou Jin-Min Liang +3 位作者 Zi-Heng Ding Zhi-Hua Chen Shao-Ming Fei Zhi-Hao Ma 《Chinese Physics Letters》 2025年第9期88-101,共14页
Quantum algorithms have demonstrated provable speedups over classical counterparts,yet establishing a comprehensive theoretical framework to understand the quantum advantage remains a core challenge.In this work,we de... Quantum algorithms have demonstrated provable speedups over classical counterparts,yet establishing a comprehensive theoretical framework to understand the quantum advantage remains a core challenge.In this work,we decode the quantum search advantage by investigating the critical role of quantum state properties in random-walk-based algorithms.We propose three distinct variants of quantum random-walk search algorithms and derive exact analytical expressions for their success probabilities.These probabilities are fundamentally determined by specific initial state properties:the coherence fraction governs the first algorithm’s performance,while entanglement and coherence dominate the outcomes of the second and third algorithms,respectively.We show that increased coherence fraction enhances success probability,but greater entanglement and coherence reduce it in the latter two cases.These findings reveal fundamental insights into harnessing quantum properties for advantage and guide algorithm design.Our searches achieve Grover-like speedups and show significant potential for quantum-enhanced machine learning. 展开更多
关键词 derive exact analytical expressions quantum search establishing comprehensive theoretical framework understand quantum advantage quantum random walk ENTANGLEMENT success probability decode quantum search advantage COHERENCE
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Asymmetric mode-pairing quantum key distribution with advantage distillation
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作者 Hai-Tao Wang Chun Zhou +5 位作者 Yi-Fei Lu Chen-Peng Hao Yan-Mei Zhao Yan-Yang Zhou Hong-Wei Li Wan-Su Bao 《Chinese Physics B》 2025年第4期109-115,共7页
Mode-pairing quantum key distribution(MP-QKD)is an excellent scheme that can exceed the repeaterless ratetransmittance bound without complex phase locking.Nevertheless,MP-QKD usually needs to ensure that the communica... Mode-pairing quantum key distribution(MP-QKD)is an excellent scheme that can exceed the repeaterless ratetransmittance bound without complex phase locking.Nevertheless,MP-QKD usually needs to ensure that the communication distances of the two channels are equal.To address the problem,the asymmetric MP-QKD protocol is proposed.In this paper,we enhance the performance of the asymmetric MP-QKD protocol based on the advantage distillation(AD)method without modifying the quantum process.The simulation results show that the AD method can extend the communication distance by about 70 km in the case of asymmetry.And we observe that as the misalignment error increases,the AD method further increases the expandable communication distance.Our work can further enhance the robustness and promote the practical application of the asymmetric MP-QKD. 展开更多
关键词 quantum key distribution asymmetric mode-pairing advantage distillation
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From advantage to disadvantage: how FinTech impacts small banks?
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作者 Ye Guo Xiaoying Liu Mingming Zhang 《Financial Innovation》 2025年第1期3587-3619,共33页
The recent development of FinTech has raised concerns about the unique role of small banks in the small business lending market;therefore,this study investigates how FinTech affects small banks,focusing on their compa... The recent development of FinTech has raised concerns about the unique role of small banks in the small business lending market;therefore,this study investigates how FinTech affects small banks,focusing on their comparative advantage in the small business lending market.Our results suggest that FinTech development,either from BigTech firms or big banks’adoption of technology,negatively affects small banks and decreases their small business loans and unsecured credit loans.Our mechanism analyses show that the technological advantages of BigTech firms and big banks facilitate their credit supply to small-and medium-sized enterprises and reduce SMEs’demand from small banks,challenging the soft information-based business models employed by small banks.Conversely,small banks with superior technological capabilities and a longer local presence are less affected.Overall,our findings highlight the negative effect of FinTech development on the small bank advantage. 展开更多
关键词 FinTech development Small bank advantage FinTech adoption
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Second-order topological insulator in twisted bilayer graphene with small twist angles
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作者 Fenghua Qi Jie Cao +1 位作者 Xingfei Zhou Guojun Jin 《Chinese Physics B》 2025年第11期484-490,共7页
In recent years,the study of higher-order topological states and their material realizations has become a research frontier in topological condensed matter physics.We demonstrate that twisted bilayer graphene with sma... In recent years,the study of higher-order topological states and their material realizations has become a research frontier in topological condensed matter physics.We demonstrate that twisted bilayer graphene with small twist angles behaves as a second-order topological insulator possessing topological corner charges.Using a tight-binding model,we compute the topological band indices and corner states of finite-sized twisted bilayer graphene flakes.It is found that for any small twist angle,whether commensurate or incommensurate,the gaps both below and above the flat bands are associated with nontrivial topological indices.Our results not only extend the concept of second-order band topology to arbitrary small twist angles but also confirm the existence of corner states at acute-angle corners. 展开更多
关键词 second-order topological insulators twisted bilayer graphene
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Sufficient and Necessary Conditions for Leader-Following Consensus of Second-Order Multi-Agent Systems via Intermittent Sampled Control
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作者 Ziyang Wang Yuanzhen Feng +1 位作者 Zhengxin Wang Cong Zheng 《Computers, Materials & Continua》 2025年第6期4835-4853,共19页
Continuous control protocols are extensively utilized in traditional MASs,in which information needs to be transmitted among agents consecutively,therefore resulting in excessive consumption of limited resources.To de... Continuous control protocols are extensively utilized in traditional MASs,in which information needs to be transmitted among agents consecutively,therefore resulting in excessive consumption of limited resources.To decrease the control cost,based on ISC,several LFC problems are investigated for second-order MASs without and with time delay,respectively.Firstly,an intermittent sampled controller is designed,and a sufficient and necessary condition is derived,under which state errors between the leader and all the followers approach zero asymptotically.Considering that time delay is inevitable,a new protocol is proposed to deal with the time-delay situation.The error system’s stability is analyzed using the Schur stability theorem,and sufficient and necessary conditions for LFC are obtained,which are closely associated with the coupling gain,the system parameters,and the network structure.Furthermore,for the case where the current position and velocity information are not available,a distributed protocol is designed that depends only on the sampled position information.The sufficient and necessary conditions for LFC are also given.The results show that second-order MASs can achieve the LFC if and only if the system parameters satisfy the inequalities proposed in the paper.Finally,the correctness of the obtained results is verified by numerical simulations. 展开更多
关键词 Intermittent sampled control leader-following consensus time delay second-order multi-agent system
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The Advantages and Pathways of Digital Storytelling in Empowering the Integration of the Party’s Innovative Theories into Ideological and Political Education in Colleges and Universities
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作者 Yanni Liu 《Journal of Contemporary Educational Research》 2025年第11期70-77,共8页
The Party’s innovative theories represent the latest achievements in adapting Marxism to the Chinese context and the modern era,and their integration into ideological and political education is an inevitable requirem... The Party’s innovative theories represent the latest achievements in adapting Marxism to the Chinese context and the modern era,and their integration into ideological and political education is an inevitable requirement and important measure for cultivating new talents of the era.Against the backdrop of the vigorous development of digital technology,digital storytelling has emerged as a significant paradigm for teaching reform and innovation,offering notable advantages in empowering the integration of the Party’s innovative theories into ideological and political education,such as enhancing the perceptibility of theories,expanding the reach of theories,strengthening theoretical identification,and promoting personalized internalization of theories.In the practical teaching of ideological and political courses,efforts should be concentrated on four dimensions:improving teachers’digital storytelling teaching abilities,developing high-quality digital storytelling teaching resources,establishing diverse digital storytelling teaching platforms,and improving the digital storytelling teaching support system,to provide systematic support for the integration of the Party’s innovative theories into ideological and political education. 展开更多
关键词 Digital storytelling The Party’s innovative theories advantages PATHWAYS
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Beyond emissions data: How China’s apparel giants are rewriting ESG as competitive advantage
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作者 Zhong Mengxia 《China Textile》 2025年第3期38-38,共1页
As the EU's carbon border tax approaches implementation and Generation Z increasingly prioritizes sustainability in their purchasing decisions,ESG has evolved from a moral concern to business survival challenges.B... As the EU's carbon border tax approaches implementation and Generation Z increasingly prioritizes sustainability in their purchasing decisions,ESG has evolved from a moral concern to business survival challenges.By analyzing the latest ESG reports released by prominent apparel brands in the China garment industry,including Bosideng,Anta,Youngor,Li-Ning,and Lilanz,we can see it’s not about a series of emission reduction data but a comprehensive innovation encompassing products,processes,and the entire value chain. 展开更多
关键词 sustainability competitive advantage APPAREL emission reduction data carbon border tax ESG China innovation
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Phenotypic advantages and improved genomic stability following selection in advanced selfing-generations of Brassica allohexaploids
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作者 Yan Niu Rui Yang +9 位作者 Zelong Li Zhengxuan Huo Shihao Chang Entang Tian Han Qin Wallace A.Cowling Kadambot H.M.Siddique Annaliese S.Mason Sheng Chen Jun Zou 《Journal of Genetics and Genomics》 2025年第6期799-811,共13页
Allopolyploids often exhibit advantages in vigor and adaptability compared to diploids.A long-term goal in the economically important Brassica genus has been to develop a new allohexaploid crop type(AABBCC)by combinin... Allopolyploids often exhibit advantages in vigor and adaptability compared to diploids.A long-term goal in the economically important Brassica genus has been to develop a new allohexaploid crop type(AABBCC)by combining different diploid and allotetraploid crop species.However,early-generation allohexaploids often face challenges like unstable meiosis and low fertility,and the phenotypic performance of these synthetic lines has rarely been assessed.This study analyzes agronomic traits,fertility,and genome stability in ArArBcBcCcCc lines derived from four crosses between B.carinata and B.rapa after 9–11 selfing generations.Our results demonstrate polyploid advantage in vigor and seed traits,considerable phenotypic variation,and high fertility and genome stability.Meanwhile,parental genotypes significantly influence outcomes in advanced allohexaploids.Structural variants,largely resulting from A–C homoeologous exchanges,contribute to genomic variation and influence hexaploid genome stability,with the A sub-genome showing the highest variability.Both positive and negative impacts of SVs on fertility and seed weight are observed.Pseudo-euploids,frequently appearing,do not significantly affect fertility or other agronomic traits compared to euploids,indicating a potential pathway toward a stable allohexaploid species.These findings provide insights into the challenge and potential for developing an adaptable and stable Brassica hexaploid through selection. 展开更多
关键词 Brassica species Synthetic allohexaploid Homoeologous exchange Genome stability Polyploid advantage Structural variants
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Analysis of the Advantages and Disadvantages of Artificial Intelligence Technology in Promoting Student Professional Development
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作者 Chang Liu Xiaoqian Wu 《Journal of Contemporary Educational Research》 2025年第4期155-160,共6页
The extensive application of artificial intelligence(AI)technology is profoundly affecting the ecology of education.To analyze the advantages and disadvantages of AI for the professional growth of students,this study ... The extensive application of artificial intelligence(AI)technology is profoundly affecting the ecology of education.To analyze the advantages and disadvantages of AI for the professional growth of students,this study systematically analyzed the potential dual impacts of AI in higher education from two dimensions,namely academic ability and thinking patterns.Results indicated AI facilitated the development of students by improving learning efficiency and optimizing the integration of resources.However,it simultaneously aggravated the crisis of academic integrity and the inertia of thinking.In responding to these issues,this study proposed an integrated framework that included management,guidance,and standardization.This framework would facilitate the positive interaction between AI and education,contributing to the professional development of students. 展开更多
关键词 Artificial intelligence advantages and disadvantages Professional development of students Integrated frameworks
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Mode-pairing quantum key distribution with multi-step advantage distillation
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作者 Shizhuo Li Xin Liu +1 位作者 Zhenrong Zhang Kejin Wei 《Chinese Physics B》 2025年第9期85-95,共11页
The advantage distillation(AD)technology has been proven to effectively improve the secret key rate and the communication distance of quantum key distribution(QKD).The mode-pairing quantum key distribution(MP-QKD)prot... The advantage distillation(AD)technology has been proven to effectively improve the secret key rate and the communication distance of quantum key distribution(QKD).The mode-pairing quantum key distribution(MP-QKD)protocol can overcome a fundamental physical limit,known as the Pirandola-Laurenza-Ottaviani-Banchi bound,without requiring global phase-locking.In this work,we propose a method based on multi-step AD to further enhance the performance of MP-QKD.The simulation results show that,compared to one-step AD,multi-step AD achieves better performance in long-distance scenarios and can tolerate a higher quantum bit error rate.Specifically,when the difference between the communication distances from Alice and Bob to Charlie is 25 km,50 km and 75 km,and the corresponding transmission distance exceeds 523 km,512 km and 496 km,respectively,the secret key rate achieved by multi-step AD surpasses that of one-step AD.Our findings indicate that the proposed method can effectively promote the application of MP-QKD in scenarios with high loss and high error rate. 展开更多
关键词 mode-pairing quantum key distribution multi-step advantage distillation secret key rate
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Electromagnetically induced transparency and second-order sideband effects in a Laguerre–Gaussian cavity optorotational system with Kerr medium
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作者 Jing-Xuan Li Su-Mei Huang Ai-Xi Chen 《Communications in Theoretical Physics》 2025年第7期54-62,共9页
In this paper,we investigate the phenomena of electromagnetically induced transparency and the generation of second-order sideband in a Laguerre–Gaussian cavity optorotational system with a Kerr nonlinear medium.Usin... In this paper,we investigate the phenomena of electromagnetically induced transparency and the generation of second-order sideband in a Laguerre–Gaussian cavity optorotational system with a Kerr nonlinear medium.Using the perturbation method,we analyze the first-and second-order sideband generations in the output field from the system under the actions of a strong control field and a weak probe field.Numerical simulations show that the Kerr nonlinearity can lead to the occurrence of the asymmetric line shape in the transmission of the probe field.Comparing with traditional scheme for generating the second-order sideband,our spectral shape of the second-order sideband is amplified and becomes asymmetric,which has potential applications in precision measurement,high-sensitivity devices,and frequency conversion. 展开更多
关键词 Laguerre–Gaussian cavity optorotational system electromagnetically induced transparency second-order sideband generation Kerr medium
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Stabilization of second-order bilinear systems with time delay by a class of bounded feedbacks
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作者 Khalil El Kazoui Hassan Ezzaki 《Control Theory and Technology》 2025年第4期579-589,共11页
The stabilization problem of second-order bilinear systems with time delay is investigated.Feedback controls are chosen so that the strong and exponential stabilization of the system is ensured.The obtained results ar... The stabilization problem of second-order bilinear systems with time delay is investigated.Feedback controls are chosen so that the strong and exponential stabilization of the system is ensured.The obtained results are illustrated by wave and beam equations with simulation. 展开更多
关键词 second-order systems Bilinear systems Time delay Strong stabilization Exponential stabilization Wave equation Beam equation
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