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Nuclear Science and Techniques 2023年第2期34卷 109-127页

作者： Wei‑Hao Ji Jian‑Jie Cheng han‑zhong tao Wei Li College of Urban Construction Nanjing Tech UniversityNanjing 211800China School of Energy Science and Engineering Nanjing Tech UniversityNanjing 211800China

Dry storage containers must be secured and reliable during long-term storage,and the effect of decay heat released from the internal spent fuel on the cask has become an important research *** this paper,a 3D computational fluid dynamics model is presented,and the accuracy of the calculation is verified,with computational errors of less than 6.2%.The thermal stress of the dry storage cask was estimated by coupling it with a transient temperature *** total power remained constant and adjusting the power ratio of the inner and outer zones had a small effect on the stress results,with a maximum equivalent stress of approximately 5.2 kPa,which occurred at the lower edge of the *** the case of tilt,the temperature gradient varied in a wavy distribution,and the wave crest moved from right to *** the tilt angle affects the air distribution in the annular gap,leading to the shell temperature being transformed,with a maximum equivalent stress of 202 MPa at the bottom of the ***,the equivalent stress in both cases was less than the yield stress(205 MPa).

关键词： Thermal stress CFD simulation Spent nuclear fuel Dry storage cask

Decoupled thermal–hydraulic analysis of an air-cooled separated heat pipe for spent fuel pools under natural convection

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Nuclear Science and Techniques 2023年第6期34卷 183-197页

作者： Hui-Lin Xue Jian-Jie Cheng Wei-Hao Ji Wen-Jin Li han-zhong tao Wei Li College of Urban Construction Nanjing Tech UniversityNanjing211800China School of Energy Science and Engineering Nanjing Tech UniversityNanjing211800China

An investigation of the decoupled thermal–hydraulic analysis of a separated heat pipe spent fuel pool passive cooling system(SFS)is essential for practical engineering *** on the principles of thermal and mass balance,this study decoupled the heat transfer processes in the *** accordance with the decoupling conditions,we modeled the spent fuel pool of the CAP1400 pressurized water reactor in Weihai and used computational fluid dynamics to explore the heat dissipation capacity of the SFS under different air temperatures and wind *** results show that the air-cooled separated heat pipe radiator achieved optimal performance at an air temperature of 10℃ or wind speed of 8 m/*** equations for the equivalent thermal conductivity of the separated heat pipes with the wind speed and air temperature we obtained according to the thermal resistance network *** study is instructive for the actual operation of an SFS.

关键词： Decoupled analysis Separated heat pipe CAP1400 Finned tube radiator Passive cooling

Metamorphopsia after surgery for rhegmatogenous retinal detachment

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International Journal of Ophthalmology(English edition) 2025年第1期18卷 168-177页

作者： han-tao Zhou zhong Lin National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina

Improvements in surgical techniques have led to 90% success in the surgical repair of rhegmatogenous retinal detachment(RRD).However,anatomical reattachment of the retina does not ensure complete recovery of visual *** incidence of metamorphopsia remains the most common postoperative complaint,from 24% to 88.6%.Currently,the risk factors of metamorphopsia are categorized into macular involvement,retinal shift,outer retinal folds,subretinal fluid,secondary epiretinal membrane,outer retinal layer damage,and surgical *** associations of metamorphopsia with postoperative best-corrected visual acuity and postoperative vision-related quality of life were still *** most popular methods for assessment of metamorphopsia remain the Amsler grid and *** treatments cannot progress beyond the management of negative visual sensations,through methods such as occlusion therapy and aniseikonia-correcting *** main treatment approach involves RRD prevention and the management of risk factors that can lead to postoperative metamorphopsia after RRD *** research concerning metamorphopsia treatment,further upgrades of auxiliary inspection methods,and more accurate microstructural assessments are needed to address this common complication.

关键词： retinal detachment rhegmatogenous retinal detachment metamorphopsia visual distortion

Perfluoroalkylation of aromatics

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Chinese Journal of Chemistry 1993年第3期11卷 272-279页

作者： HUANG,Wei-Yuan YING,Wei-Wen ZhanG,han-zhong LIU,Jin-tao Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032 Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032

Several methods for the perfluoroalkylation of aromatics were *** per- fluoroalkanesulfonyl bromide/BPO and perfluoroalkanesulfinate/oxidant systems were efficient reagents for the introduction of a pcrfluoroalkyl group onto various aromatic *** a two-phase solvent system with tetraalkylammonium salt as PTC,rcaction of perfluoroalkyl iodide and aromatics in the presence of sodium dithionitc gave perfluoroalkyl aromatics and/or addition-dimerization products.

关键词： ppm CF SH Perfluoroalkylation of aromatics CTMAB CDC

Secure beamforming and deployment design for rate-splitting multiple access-based UAV communications

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Science China(Information Sciences) 2025年第1期68卷 342-356页

作者： Bing WANG Xiaofeng tao Shujun han Huici WU Kai YANG Zhu han National Engineering Research Center of Mobile Network Technologies Beijing University of Posts and Telecommunications Peng Cheng Laboratory Department of Electrical and Computer Engineering University of Houston

Rate-splitting multiple access(RSMA) has recently gained attention as a potential robust multiple access(MA)scheme for upcoming wireless networks. Given its ability to efficiently utilize wireless resources and design interference management strategies, it can be applied to unmanned aerial vehicle(UAV) networks to provide convenient services for large-scale access ground users. However, due to the line-of-sight(LoS) broadcast nature of UAV transmission, information is susceptible to eavesdropping in RSMA-based UAV networks. Moreover, the superposition of signals at the receiver in such networks becomes complicated. To cope with the challenge, we propose a two-user multi-input single-output(MISO) RSMA-based UAV secure transmission framework in downlink communication networks. In a passive eavesdropping scenario, our goal is to maximize the sum secrecy rate by optimizing the transmit beamforming and deployment location of the UAV-base station(UAV-BS),while considering quality-of-service(QoS) constraints, maximum transmit power, and flight space limitations. To address the non-convexity of the proposed problem, the optimization problem is first decoupled into two subproblems. Then, the successive convex approximation(SCA) method is employed to solve each subproblem using different propositions. In addition, an alternating optimization(AO)-based location RSMA(L-RSMA) beamforming algorithm is developed to implement joint optimization to obtain the suboptimal solution. Numerical results demonstrate that(1) the proposed L-RSMA scheme yields a28.97% higher sum secrecy rate than the baseline L-space division multiple access(SDMA) scheme;(2) the proposed L-RSMA scheme improves the security performance by 42.61% compared to the L-non-orthogonal multiple access(NOMA) scheme.

关键词： rate-splitting multiple access UAV communication precoding optimization deployment location physical layer security

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矮新星概述与研究进展

天文学进展 2014年第4期32卷 441-461页

作者：韩忠涛中国科学院云南天文台昆明650011 中国科学院大学北京100049

矮新星是爆发频繁的激变变星,主星是白矮星,次星是充满洛希瓣的晚型矮星;白矮星周围有吸积盘,物质流与吸积盘的碰撞区域即热斑。与大多数密近双星系统相比,矮新星最大的特点是吸积盘的存在以及频繁的爆发现象。首先介绍了矮新星的研究... 详细信息

矮新星是爆发频繁的激变变星,主星是白矮星,次星是充满洛希瓣的晚型矮星;白矮星周围有吸积盘,物质流与吸积盘的碰撞区域即热斑。与大多数密近双星系统相比,矮新星最大的特点是吸积盘的存在以及频繁的爆发现象。首先介绍了矮新星的研究历史和现状,对吸积盘的形成过程进行总结,给出了矮新星的基本物理图像;其次简要介绍了矮新星的各种次型的特征和形成原因,对目前的爆发模型进行归纳;回顾了矮新星中著名的轨道周期空缺现象和最短轨道周期截止现象,并给出其在标准化模型下的解释以及标准化模型面临的挑战;举例说明了矮新星的轨道周期变化分析不仅对研究其演化起着重要作用,而且是探测褐矮星和地外行星的重要手段;对食光变曲线的分析方法和矮新星中罕见的高低态变化进行了简单小结;最后,进行总结并讨论矮新星领域的发展趋势和目前的一些热点问题。

关键词：双星激变变星矮新星爆发高低态

Phosphorylation modification reverses the transcriptional inhibitory activity of CsMYB4a in tea plants(Camellia sinensis)

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Horticultural Plant Journal 2025年第1期11卷 406-416页

作者： Guoliang Ma Yunyun han Tongtong Li tao Xia Liping Gao School of Life Science Anhui Agricultural UniversityHefeiAnhui 230036China State Key Laboratory of Tea Plant Biology and Utilization Key Laboratory of Tea Biology and Tea Processing of Ministry of AgricultureAnhui Provincial Laboratory of Tea Plant Biology and UtilizationAnhui Agricultural UniversityHefeiAnhui 230036China

The members of the fourth subgroup of R2R3-MYB(Sg4 members)are well-known inhibitors of phenylpropanoid and lignin synthesis *** C2 domain is closely related to the transcriptional inhibitory activity of Sg4 *** modification enhances the transcriptional inhibitory activity of Sg4 ***,we identified a phosphorylation site on the C2 domain of Cs MYB4a from tea plants(Camellia sinensis).A mitogen-activated protein kinase(MAPK),named Cs MPK3-2,phosphorylated this site on the C2 domain of Cs *** experiments revealed that phosphorylation of Cs MYB4a weakened its ability to inhibit the gene expression of PAL,C4H,and 4CL in the phenylpropanoid pathway and activated the expression of transcription factor YABBY5,maintaining the adaxial-abaxial polarity of the *** out Nt YAB5 in Cs MYB4a transgenic tobacco partially repaired the leaf wrinkling phenotype caused by Cs *** C1 domain exhibited an activation function when the C2 domain of Cs MYB4a was phosphorylated by Cs MPK3-2,causing this reversal *** results enrich our understanding of the regulatory diversity of Sg4 members.

关键词： Camellia sinensis Cs MYB4a Phenylpropanoid pathway MAPK YABBY Leaf development

High-precision tip positioning composite feedforward control of linear colocated motion systems with Bi-Loop iterative feedforward tuning

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Science China(Technological Sciences) 2025年第2期68卷 153-166页

作者： Junyu HU Yourui tao Shanhu LI Xu han College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjin 300130China

To enhance the tip positioning accuracy and robustness against disturbances of linear colocated motion systems,a novel composite feedforward(COMFF)control with Bi-Loop iterative feedforward tuning(IFFT)is *** tip positioning error consists of the coupled tip residual vibration and linear motor tracking *** the influence of nonlinear friction and load flexibility,the topology of COMFF is designed as decoupled structures so that COMFF can suppress the tip residual vibration and compensate for the linear motor tracking error ***,Bi-Loop IFFT is built to improve the robustness of COMFF in high-precision motor tracking *** the state space of the linear motor tracking error based on the projection theorem,two loops are performed in parallel along the iteration *** is the P-type iteration loop that drives linear motor tracking errors to converge to the zero *** other is the observation loop constructed by the recursive least square with forgetting factors to accelerate the P-type iteration *** by the P-type iteration loop with the aid of the observation loop,the proposed COMFF is integrated with fast convergence and high robustness when confronted with model *** effectiveness of the proposed COMFF combined with Bi-Loop IFFT is validated by experiments.

关键词： composite feedforward(COMFF)control Bi-Loop iterative feedforward tuning(Bi-Loop IFFT) colocated motion systems nonlinear friction flexible load

Improving precision base editing of the zebrafish genome by Rad51DBD-incorporated single-base editors

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Journal of Genetics and Genomics 2025年第1期52卷 105-115页

作者： Zhilin zhong Xueli Hu Renjie Zhang Xu Liu Wenqi Chen Shubin Zhang Jianjian Sun tao P.zhong Shanghai Frontiers Science Center of Genome Editing and Cell Therapy Shanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai 200241China Guangdong Cardiovascular Institute Guangdong Provincial People's HospitalSouthern Medical UniversityGuangzhouGuangdong 510100China

Single-base editors,including cytosine base editors(CBEs)and adenine base editors(ABEs),facilitate accurate C·G to T·A and A·T to G·C,respectively,holding promise for the precise modeling and treatment of human hereditary *** base editing and expanded base conversion range have been achieved in human cells through base editors fusing with Rad51 DNA binding domain(Rad51DBD),such as ***,we show that hyA3A-BE4max catalyzes C-to-T substitution in the zebrafish genome and extends editing positions(C_(12)-C_(16))proximal to the protospacer adjacent *** develop a codon-optimized counterpart zhyA3A-CBE5,which exhibits substantially high C-to-T conversion with 1.59-to 3.50-fold improvement compared with the original *** these tools,disease-relevant hereditary mutations can be more efficaciously generated in *** introduce human genetic mutation rpl11^(Q42*)and abcc6a^(R1463C) by zhyA3A-CBE5 in zebrafish,mirroring Diamond-Blackfan anemia and Pseudoxanthoma Elasticum,*** study expands the base editing platform targeting the zebrafish genomic landscape and the application of single-base editors for disease modeling and gene function study.

关键词： Zebrafish Base editor Rad51DBD ZhyA3A-CBE5 PXE syndrome

Flat-band based high-temperature ferromagnetic semiconducting state in the graphitic C₄N₃ monolayer

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Fundamental Research 2025年第1期5卷 138-144页

作者： He, Chaoyu Liao, Yujie Ouyang, tao Zhang, Huimin Xiang, Hongjun zhong, Jianxin Laboratory for Quantum Engineering and Micro-Nano Energy Technology and School of Physics and Optoelectronics Xiangtan University Xiangtan 411105 China Key Laboratory of Computational Physical Sciences (Ministry of Education) Institute of Computational Physical Sciences Department of Physics Fudan University Shanghai 200433 China

Half-filled isolated flat-band paves a new way to realize high-temperature ferromagnetic semiconductor for spintronics applications, but it is extremely rare in lattice models and lacking in realistic materials. Herein, the 2 × 2 super-cell of the honeycomb lattice with a single-hole defect is proposed as a new lattice model (HL-D-1/8) to realize nontrivial isolated flat-bands. We further demonstrate that C4N3 monolayer of the experimentally realized graphitic carbon nitride (Adv. Mater., 22, 1004, 2010;Nat. Commun., 9, 3366, 2018) is a perfect system holding such a lattice to host flat-bands. A new corrugated Pca21 configuration is proposed as the ground state for the free-standing C4N3 monolayer, which is dynamically stable and energetically more favorable than the widely-used flat one without dynamical stability. The Pca21 configuration is found to be an intrinsic ferromagnetic half-semiconductor (Tc ≈ 241 K) with one semiconducting spin-channel (1.75 eV) and one insulating spin-channel (3.64 eV), which is quite rare in two-dimensional systems. Its ferromagnetic semiconducting property originates from the isolated pz-state flat-band as the corrugation shifts the flat-band upward to the Fermi level. Interestingly, such a corrugated Pca21 C4N3 monolayer is found to be both piezoelectric and ferroelectric, which makes it an unusual metal-free two-dimensional multiferroic. © 2023

关键词： Ferromagnetic semiconductor First-principles calculation Graphitic C4N3 Isolated flat-band Tight-binding model Two-dimensional multiferroic