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Voice of Friendship 2021年第3期 17-18页

作者： Ai lin 不详

On July 14,the All Pakistan-China Friendship Association hosted a video seminar commemorating 70 years of China-Pakistan relations and recalling the past and building a community with a shared future for the new era.

关键词： anniversary diplomatic Pakistan

Phase separation in RNA biology

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Journal of Genetics and Genomics 2021年第10期48卷 872-880页

作者： yi lin Xiaofeng Fang School of Life Sciences Tsinghua UniversityBeijing 100084China

The formation of biomolecular condensates via liquid-liquid phase separation(LLPS)is an advantageous strategy for cells to organize subcellular compartments for diverse *** involvement of LLPS is more widespread and overrepresented in RNA-related biological *** is in part because that RNAs are intrinsically multivalent macromolecules,and the presence of RNAs affects the formation,dissolution,and biophysical properties of biomolecular condensates formed by *** studies have illustrated how LLPS participates in RNA transcription,splicing,processing,quality control,translation,and *** interconnected regulation between LLPS and RNAs ensures tight control of RNA-related cellular functions.

关键词： Phase separation RNA biology Condensates Membrane-less organelle

Relativistic Filamentation of Intense Laser Beam in Inhomogeneous Plasma

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Plasma Science and Technology 2012年第12期14卷 1054-1058页

作者： XIA Xiongping yi lin Department of Physics Huazhong University of Science and Technology Wuhan 430074China Department of Science Guilin University of Technology Guilin 541004 China

In the paper, relativistic filamentation of intense laser beam in inhomogeneous plasma is investigated based on the nonparaxial region theory. The results show that, relativistic nonlinearity plays a main role in beam filamentation, and plasma inhomogeneity further reinforces the beam filamentation. The combination effects of relativistic nonlinearity and plasma inhomogeneity can generate particularly intense and short pulse laser. However, plasma inhomogeneity leads to obvious filamentation instability.

关键词： relativistic filamentation relativistic nonlinearity plasma inhomoheneous

Geometrically modeling 2D scattered points: a review of the potential for methodologically improving mobile laser scanning in data processing

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International Journal of Digital Earth 2014年第6期7卷 432-449页

作者： yi lin Juha Hyyppa Department of Remote Sensing and Photogrammetry Finnish Geodetic Institute MasalaFinland

As a state-of-the-art mapping technology,mobile laser scanning(MLS)is increasingly applied to fields such as digital presentations of city ***,its application has recently met a bottleneck in data *** has been found that conventional methods for geometrically modeling 3D scattered points are inadequate when dealing with large volumes of MLS *** fact,this is a challenge that has already been noted in the MLS-relevant fields,*** sensing,robot perception,and pattern recognition.A variety of algorithms under the schematic frame of analysis,modeling and synthesis(AMS)have been developed in these *** AMS paradigm is to first extract the implicit geometric primitives within each scan profile by geometrically modeling its 2D scattered points(GM2P).The resultant 2D geometric primitives are then integrated to restore the real 3D geometrical *** this process,GM2P is a kernel procedure whereby a review of the GM2P algorithms is assumed to be of significance for developing new efficient algorithms for geometrically modeling 3D scattered *** idea is supported by MLS sampling often being executed via parallel scan ***,the results of the literature review indicate an avenue for methodologically improving MLS in data processing.

关键词： MLS geometrically modeling scattered points GM2P AMS scan profile

Adsorption and Decomposition of NH3 on Ni/Pt（111） and Ni/WC（001） Surfaces： A First-Principles Study

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Chinese Journal of Chemical Physics 2016年第6期29卷 710-716,I0002页

作者： Ai-ai Shen yi-lin Cao Schoolof:ChemistryandChemicalEnEineerin~.HenanNormalUniversity.Xinxi~n~453007.China

Density functional theory was used to study the NH3 behavior on Ni monolayer covered Pt（111） and WC（001）. The electronic structure of the surfaces, and the adsorption and decomposition of NH3 were calculated and compared. Ni atoms in the monolayer behave different from that in Ni（111）. More dz2 electrons of Ni in monolayer covered systems were shifted to other regions compared to Ni（111）, charge density depletion on this orbital is crucial to NH3 adsorption. NH3 binds more stable on Ni/Pt（lll） and Ni/WC（001） than on Ni（111）, the energy barriers of the first N-H bond scission were evidently lower on Ni/Pt（111） and Ni/WC（001） than on Ni（111）, these are significant to NH3 decomposition. N recombination is the rate-limiting step, high reaction barrier implies that N2 is produced only at high temperatures. Although WC has similar properties to Pt, differences of the electronic structure and catalytic activities are observed for Ni/Pt（111） and Ni/WC （001）, the energy barrier for the rate-determined step increases on Ni/WC（001） instead of decreasing on Ni/Pt（lll） when compared to Ni（111）. the N recombination barrier by modifying To design cheaper and better catalysts, reducing Ni/WC（001） is a critical question to be solved.

关键词： Ni monolayer Electronic structure NH3 decomposition Density functionaltheory

Multidisciplinary Design Optimization with a New Effective Method

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Chinese Journal of Mechanical Engineering 2010年第4期23卷 505-510页

作者： CHEN Xiaokai LI Bangguo lin yi National Engineering Laboratory of Electric Vehicle Beijing Institute of Technology Beijing 100081 China

Collaborative optimization （CO） is one of the most widely used methods in multidisciplinary design optimization （MDO）, which is an effective methodology to solve modem complex engineering problems. CO consists of two-level optimization problems which are system optimization problem and subspace optimization problem. The architecture of CO can reserve the autonomy of individual disciplines in maximum, while providing a mechanism for coordinating design problem. However, CO has low computation efficiency and is easy to diverge. For the purpose of solving these problems, the former improved methods were studied. The relaxation factors were used to change the system consistency constraints to inequality constraints, or the response surface estimation was used to surrogate the system consistency constraints. However, these methods didn＇t avoid the computational difficulties very well, furthermore, some new problems arose. The concept of optimum constraint sensitivity was proposed, and the quadratic constraints in system level were reformed. Hence, a new collaborative optimization was developed, which is called system level dynamic constraint collaborative optimization （DCCO）. The novel method is able to increase the exchange of information between system level and disciplinary level. The optimization results of each disciplinary optimization can be feedback to system level with the optimum constraint sensitivity. On the basis of the information, the new system level linear dynamic constraints can be constructed; it is better to reflect the effect of disciplinary level optimizations. The system level optimizer can clearly capture the boundary where disciplinary objective functions become zero, and considerably enhance the convergence. Two standard MDO examples were conducted to verify the feasibility and effectiveness of DCCO. The results show that DCCO can save the solving time, and is much better in terms of convergence and robustness, hence, the new method is more effi

关键词： multidisciplinary design optimization (MDO) collaborative optimization (CO) dynamic constraint

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Tor被动流量分析综述

软件学报 2025年第1期36卷 253-288页

作者：梅汉涛程光朱怡霖周余阳东南大学网络空间安全学院江苏省泛在网络安全工程研究中心(东南大学) 网络空间国际治理研究基地(东南大学) 紫金山实验室

随着网络的蓬勃发展,用户隐私正面临着前所未有的挑战.人们开发出多种匿名通信系统来保护隐私,第2代洋葱路由Tor (the second-generation onion router)是目前最为广泛使用的匿名通信系统.然而,卓越的匿名性也使之成为不法分子犯罪的温... 详细信息

随着网络的蓬勃发展,用户隐私正面临着前所未有的挑战.人们开发出多种匿名通信系统来保护隐私,第2代洋葱路由Tor (the second-generation onion router)是目前最为广泛使用的匿名通信系统.然而,卓越的匿名性也使之成为不法分子犯罪的温床,如今Tor中充斥着非法交易、网络犯罪等. Tor被动流量分析通过被动观察网络流量对Tor进行去匿名化,已成为最热门的去匿名化技术.从Tor与流量分析基本概念出发,介绍Tor被动流量分析技术的应用场景与威胁模型.按照技术类型将现有工作分为流量分类技术与流关联技术,依据分析流程分别对比其流量采集方法、特征提取方法、使用算法.最后探讨当前研究面临的主要挑战与未来可能的研究趋势.

关键词： Tor 流量分析流量分类网站指纹流关联

The effects of ion screening on neutrino-nucleus interactions in core-collapse supernova explosions

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Research in Astronomy and Astrophysics 2010年第7期10卷 689-695页

作者： Xiong-Ping Xia lin yi Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

The effects of ion screening in stellar core collapses are investigated based on a new progenitor star model. Simulation results show that ion screening slightly affects the leptons and decreases explosion energy, which is a negative factor for energy transfer supernova explosions. We also investigate the effect on type Ⅱ-supernova explosions of neutrino-nucleus elastic scattering based on the new progenitor star model. It is shown that, compared with the previously calculated results, neutrinos-nucleus elastic scattering in stellar core collapses is more severe, leading to an obvious reduction of the neutrino leakage energy loss and an increase of supernova explosion energy.

关键词： stars supernovae general -- neutrino-nucleus

Anomalous Optical and Electronic Properties of CaTiO3 Perovskites

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Communications in Theoretical Physics 2007年第3X期48卷 563-570页

作者： LIU Hui-Ping DUAN yi-Feng yi lin Department of Physics and State Key Laboratory of Laser Technology Huazhong University of Science and TechnologyWuhan 430074 China

With the help of the first-prlnciples full potential linearized augmented plane wave method, absorption coefficients, reflect/vity, dielectric behavior and electronic properties, including electronic energy bands, density of states and charge density distributions, are studied for the tetragonal and cubic CaTiO3. By considering the thermal expansion effects, an approximate method is proposed for the study of the stability of ground state and a tendency of phase transition, based on the minimum free energy principle. Subsequently, numerical calculations are carried out by using the first-principles perturbation method. We demonstrate that the high-temperature phase is cubic. It is shown that optical spectra in tetragonal phase exhibit single-peak feature and differ from multi-peak character in cubic. We find that strong orbital hybridization results in the co-valent bonds between Ti 3d and O 2p electrons and forms two-type dipoles （Ti-Ol and Ti-02） in tetragonal, while the Ti-O dipoles are identical in cubic. It is argued that crystal structure determines the dipole distributions and leads to some electron states among which the dipole-dipole transit/on forbidden is a key, causing such anomalous optical phenomena with the insulator characteristics. The predicted charge density distribution and the tendency of phase transition from tetragonal to cubic are in good agreement with experimental observations.

关键词： first-principles calculations CaTiO3 perovskites optical and electronic properties

Novel sutureless transplantation for primary pterygium associated with cysts

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International Journal of Ophthalmology(English edition) 2011年第3期4卷 280-283页

作者： yi Shao, Jing-lin yi Department of Ophthalmology the First Affiliated Hospital of Nanchang University Nanchang 330006 Jiangxi Province China Department of Science education the First Affiliated Hospital of Nanchang University Nanchang 330006 Jiangxi Province China Department of Endocrinology the Third Hospital of Nanchang the Affiliated Nanchang Hospital of Southern Medical University Nanchang 330009 Jiangxi Province China Laboratory of Neurobiology University of California·Irvine Irvine California 92697 USA

AIM: To evaluate the efficacy and safety of a novel sutureless AMT (amniotic membrane transplantation) or CAT (conjunctivolimbal autograft transplantation) using fibrin glue for reconstructing corneoconjunctival surfaces for primary pterygium associated with cysts. METHODS: A prospective descriptive study was made of the period 1 January 2006-1 May 2009. Nine patients with primary pterygium associated with cysts underwent pterygium and cyst excision followed by sutureless AMT or CAT using fibrin glue. RESULTS: During a mean follow-up of 8.00 +/- 0.67 months, all eyes maintained a smooth and stable corneal epithelial surface without recurrent erosion or persistent epithelial defect. The limbal donor site showed the presence of mild depressions without the formation of pseudopterygium. All eyes have good tear secretion function, tear film stability and ocular motility. CONCLUSION: Sutureless transplantation using fibrin glue is safe and effective for restoring a stable corneoconjunctival epithelium in primary pterygium associated with cysts.

关键词： sutureless pterygium cyst AMT CAT