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| 1 | Potential use of serum HBV RNA in antiviral therapy for chronic hepatitis B in the era of nucleos(t)ide analogs显示文摘 | Fengmin Lu Jie Wang Xiangmei Chen Dongping Xu Ningshao Xia | 2017 | Frontiers of Medicine2017，11，4： | 28 |
| 2 | An unbalanced PD-L1/CD86 ratio in CD14^++CD16^+ monocytes is correlated with HCV viremia during chronic HCV infection显示文摘 | Jiajia Zheng Hua Liang Chunhui Xu Qiang Xu Ting Zhang Tao Shen Fengmin LU | 2014 | Cellular & Molecular Immunology2014，11，3： | 6 |
| 3 | The modern change and evolution tendency of sand coast in the eastern area of Liaodong Gulf显示文摘The modern change and evolution tendency of sand coast in the eastern area of Liaodong GulfMiaoFengmin;BiZhaoqi;LiShuyuan;Xia... | Miao Fengmin Bi Zhaoqi Li Shuyuan Xiao Yuzhong Cong Peifu Zhuang Zhenye and Xu Weidong | 1995 | Acta Oceanologica Sinica1995，14，4： | 5 |
| 4 | Efficient projected gradient methods for cardinality constrained optimization显示文摘Sparse optimization has attracted increasing attention in numerous areas such as compressed sensing, financial optimization and image processing. In this paper, we first consider a special class of cardinality constrained optimization problems, which involves box constraints and a singly linear constraint. An efficient approach is provided for calculating the projection over the feasibility set after a careful analysis on the projection subproblem. Then we present several types of projected gradient methods for a general class of cardinality constrained optimization problems. Global convergence of the methods is established under suitable assumptions. Finally, we illustrate some applications of the proposed methods for signal recovery and index tracking.Especially for index tracking, we propose a new model subject to an adaptive upper bound on the sparse portfolio weights. The computational results demonstrate that the proposed projected gradient methods are efficient in terms of solution quality. | Fengmin Xu Yuhong Dai Zhihu Zhao Zongben Xu | 2019 | Science China Mathematics2019，62，2： | 2 |
| 5 | Adaptive projected gradient thresholding methods for constrained l0problems显示文摘In this paper, we propose and analyze adaptive projected gradient thresholding(APGT) methods for finding sparse solutions of the underdetermined linear systems with equality and box constraints. The general convergence will be demonstrated, and in addition, the bound of the number of iterations is established in some special cases. Under suitable assumptions, it is proved that any accumulation point of the sequence generated by the APGT methods is a local minimizer of the underdetermined linear system. Moreover, the APGT methods, under certain conditions, can find all s-sparse solutions for accurate measurement cases and guarantee the stability and robustness for flawed measurement cases. Numerical examples are presented to show the accordance with theoretical results in compressed sensing and verify high out-of-sample performance in index tracking. | ZHAO ZhiHua XU FengMin LI XiangYang | 2015 | Science China Mathematics2015，58，10： | 2 |
| 6 | L1/2 Regularization: A Thresholding Representation Theory and a Fast Solver 显示文摘 | XU Zongben CHANG Xiangyu XU Fengmin | 2012 | IEEE Trans Neural Network and Learning Systems2012，23，7： | 1 |
| 7 | L-1/2 Regularization: a Thresholding Representation Theory and a Fast Solver 显示文摘 | Xu Zongben Chang Xiangyu Xu Fengmin | 2012 | IEEE Transactions on Neural Networks and Learning Systems2012，23，7： | 1 |
| 8 | Approximation Algorithms for the Priority Facility Location Problem with Penalties显示文摘This paper considers the priority facility location problem with penalties. The authors develop a primal-dual 3-approximation algorithm for this problem. Combining with the greedy augmentation procedure, the authors further improve the previous ratio 3 to 1.8526. | WANG Fengmin XU Dachuan WU Chenchen | 2015 | Journal of Systems Engineering and Electronics2015，26，5： | 1 |
| 9 | Productivity and soil response to plastic film mulching durations for spring wheat on entisols in the semiarid Loess Plateau of China显示文摘 | Li Fengmin Wang Jun Xu Jinzhang | 2004 | Soil and Tillage Research2004，78，1： | 1 |
| 10 | L-l/2 Regularization: A thresholding representation theory and a fast solver 显示文摘 | XU ZONGBE CHANG X1ANGYU XU FENGMINe | 2012 | IEEE Transactions on neural net-works and learning systems2012，23，7： | 1 |
| 11 | The eigenvalue distribution on Schur complement of nonstrictly diago-nally dominant matrices and general H-matrices显示文摘 | ZHANG Cheng-yi LUO Shuanghua XU Fengmin | 2009 | Electronic Journal of Linear Algebra2009，18，： | 1 |
| 12 | Migration-collision scheme of Lattice Boltzmann method for heat conduction problems involving solidification显示文摘The phase-change problem is solved by the migration-collision scheme of lattice Boltzmann method.After formula derivation,we find that this method can give a rigorous numerical value for the phase-change temperature,which is of crucial importance.One-dimensional solidification in half-space and two-dimensional solidification in a corner are simulated.The phase change temperature and the liquid-solid interface are both obtained,and the results conform to the analytical solution. | Xia Li,~1 Yang Liu,~2 Yousheng Xu,~(1,a) Meiying Ye,~1 and Fengmin Wu~1 1.Department of Physics,Zhejiang Normal University,Jinhua 321004,China 2.Department of Mechanical Engineering,The Hong Kong Polytechnic University,Kowloon,Hong Kong,China | 2011 | Theoretical & Applied Mechanics Letters2011，1，2： | 1 |
| 13 | Plastic film mulch effect on spring wheat in a semiarid region显示文摘 | Li Fengmin Wang Jun Xu Jinzhang | 2005 | Journal of Sustainable Agriculture2005，25，4： | 1 |
| 14 | Remediation of petroleum contaminated soils through composting and rhizosphere degradation显示文摘 | Zhenyu Wang Ying Xu Jian Zhao Fengmin Li Dongmei Gao Baoshan Xing | 2011 | Journal of Hazardous Materials2011，，1： | 1 |
| 15 | Preparation and gas sensing properties of hierarchical flower-like In 2 O 3 microspheres显示文摘 | Xiumei Xu Peilu Zhao Dawei Wang Peng Sun Lu You Yanfeng Sun Xishuang Liang Fengmin Liu Hong Chen Geyu Lu | 2013 | Sensors & Actuators: B. Chemical2013，，： | 1 |
| 16 | UV-enhanced room temperature NO 2 sensor using ZnO nanorods modified with SnO 2 nanoparticles显示文摘 | Geyu Lu Jing Xu Jianbo Sun Yingshuo Yu Yiqun Zhang Fengmin Liu | 2011 | Sensors & Actuators: B. Chemical2011，，： | 1 |
| 17 | Deficiency of water can en- hance root respiration rate of drought-sensitive but not drought-tolerant spring wheat显示文摘 | Li Hongsheng Li Fengmin Xu Hao | 2004 | Agriculture Water Management2004，64，： | 1 |
| 18 | Construction of self-sensitized LiErF4:0.5%Tm^3+@LiYF4 upconversion nanoprobe for trace water sensing显示文摘LiErF4 was commonly used as a dipolar-coupled antiferromagnet,and was rarely considered as a luminescent material.Herein,we achieved the strong red upconversion emission of LiErF4 simply by an inert shell coating,i.e.,LiErF4@LiYF4.Owing to the unique and intrinsic ladder-like energy levels of Er3+ions,this LiErF4 core–shell nanostructures present red emission(~650 nm)under multi-band excitation in the near-infrared(NIR)region(~808,~980,and^1,530 nm).A brighter and monochromic red emission can be further obtained via doping 0.5%Tm3+into the LiErF4 core,i.e.,LiErF4:0.5%Tm3+@LiYF4.The enriched Er3+ions and strong monochromic red emission natures make LiErF4:0.5%Tm3+@LiYF4 nanocrystals very sensitive for trace water probing in organic solvents with detection limit of 30 ppm in acetonitrile,50 ppm in dimethyl sulfoxide(DMSO),and 58 ppm in N,N-dimethylformamide(DMF)under excitation of 808 nm.Due to their superior chemical and physical stability,these nanoprobes exhibit excellent antijamming ability and recyclability,offering them suitable for real-time and long-term water monitoring. | Ling Zhang Xiaodan Li Wang Wang Xu Zhao Xu Yan Chenguang Wang Haoqiang Bao Yang Lu Xianggui Kong Fengmin Liu Xiaomin Liu Geyu Lu | 2020 | Nano Research2020，13，10： | 0 |
| 19 | Improving PSCs' Short-circuit Current by Adding NaErF_(4): 0.5%Tm@NaLuF_(4) Up-conversion Nanoparticles Insertion Layer显示文摘In this study,we synthesized a core-shell structure of up-conversion nanoparticles(UCNPs)and deposited it on the surface of fluorine-doped tin oxide(FTO).Subsequently,we assembled a series of perovskite solar cells with FTO/UCNPs/c-TiO_(2)/mp-TiO_(2)/MAPbI3/Spiro-OMeTAD/Au structures with an effective area of 0.04 cm^(2).To optimize the devices,we adjusted the concentration of UCNPs precursor.The optimized device showed a power conversion efficiency(PCE)of 16.73%and a short-circuit current density(Jsc)of 26.94 mA/cm^(2) at AM 1.5.These values are 9.20%and 10.47%higher than those of the best performing control device(15.32%for PCE and 24.12 mA/cm^(2) for Jsc),respectively.Furthermore,we characterized the perovskite layer,charge transport layer,and perovskite solar cells using various analytical methods.The results showed that the addition of UCNPs not only improved the charge extraction and transfer,but also enhanced the stability of electron transport layer devices.In conclusion,our findings offer a process for optimizing perovskite cells using UCNPs and preliminarily analyzing their principles. | LIU Deye LU Yang LI Xu LIU Fengmin LIU Xiaomin LU Geyu | 2023 | Chemical Research in Chinese Universities2023，39，6： | 0 |
| 20 | Intelligent option portfolio model with perspective of shadow price and risk‑free profit显示文摘Since Markowitz proposed modern portfolio theory,portfolio optimization has been being a classic topic in financial engineering.Although it is generally accepted that options help to improve the market,there is still an improvement for the portrayal of their unique properties in portfolio problems.In this paper,an intelligent option portfolio model is developed that allows selling options contracts to earn option fees and considers the high leverage of options in the market.Deep learning methods are used to predict the forward price of the underlying asset,making the model smarter.It can find an optimal option portfolio that maximizes the final wealth among the call and put options with multiple strike prices.We use the duality theory to analyze the marginal contribution of initial assets,risk tolerance limit,and portfolio leverage limit for the final wealth.The leverage limit of the option portfolio has a significant impact on the return.To satisfy the investors with different risk preferences,we also give the conditions for the option portfolio to gain a risk-free return and replace the Conditional Value-at-Risk.Numerical experiments demonstrate that the intelligent option portfolio model obtains a satisfactory out-of-sample return,which is significantly positively correlated with the volatility of the underlying asset and negatively correlated with the forecast error of the forward price.The risk-free option model is effective in achieving the goal of no drawdown and gaining satisfactory returns.Investors can adjust the balance point between returns and risks according to their risk preference. | Fengmin Xu Jieao Ma | 2023 | Financial Innovation2023，9，1： | 0 |
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