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| 1 | Trajectory prediction of ballistic missiles using Gaussian process error model显示文摘Ballistic Missile Trajectory Prediction(BMTP)is critical to air defense systems.Most Trajectory Prediction(TP)methods focus on the coast and reentry phases,in which the Ballistic Missile(BM)trajectories are modeled as ellipses or the state components are propagated by the dynamic integral equations on time scales.In contrast,the boost-phase TP is more challenging because there are many unknown forces acting on the BM in this phase.To tackle this difficult problem,a novel BMTP method by using Gaussian Processes(GPs)is proposed in this paper.In particular,the GP is employed to train the prediction error model of the boost-phase trajectory database,in which the error refers to the difference between the true BM state at the prediction moment and the integral extrapolation of the BM state.And the final BMTP is a combination of the dynamic equation based numerical integration and the GP-based prediction error.Since the trained GP aims to capture the relationship between the numerical integration and the unknown error,the modified BM state prediction is closer to the true one compared with the original TP.Furthermore,the GP is able to output the uncertainty information of the TP,which is of great significance for determining the warning range centered on the predicted BM state.Simulation results show that the proposed method effectively improves the BMTP accuracy during the boost phase and provides reliable uncertainty estimation boundaries. | Ruiping JI Yan LIANG Linfeng XU Zhenwei WEI | 2022 | Chinese Journal of Aeronautics2022，35，1： | 3 |
| 2 | Effectiveness and safety of Suhuang Zhike capsule(苏黄止咳胶囊)as adjuvant treatment for acute exacerbation of chronic obstructive pulmonary disease:a systematic review and Meta-analysis显示文摘OBJECTIVE:To evaluate the efficacy and safety of Suhuang Zhike capsule(苏黄止咳胶囊) in the adjuvant treatment of acute exacerbation of chronic obstructive pulmonary disease(AECOPD).METHODS:The database including PubMed,Embase,Cochrane Library,China National Knowledge Infrastructure Database,China Science and Technology Journal Database,Chinese Biomedical Literature Database and Wanfang Data was searched.The retrieval time was from database establishment to May 2021.Randomized controlled trial(RCT) of Suhuang zhike capsule adjuvant treatment for AECOPD was included.The quality of the studies was independently evaluated and cross-checked by two reviewers,and Meta-analysis was performed by using RevMan5.3 software.RESULTS:Thirteen RCT results were included with a total sample number of 1195 cases,including 597 in the experimental group and 598 in the control group.The results showed that Suhuang zhike capsule adjuvant treatment of AECOPD could improve the total clinical effect rate compared with conventional treatment.Suhuang zhike capsule adjuvant treatment could improve forced vital capacity(FVC),forced expiratory volume in one second(FEV1),FEV1/FVC,peak expiratory flow(PEF) and other pulmonary function indexes;decrease Creactive protein(CRP),white blood cells,neutrophils and other infectious indicators;besides,the 1-year recurrence rate of the disease was decreased(all P < 0.05).CONCLUSIONS:Suhuang Zhike capsule can improve the lung function and clinical efficacy of AECOPD,thus increasing the exercise endurance,and reducing the infection and recurrence rate in AECOPD patients. | DAI Linfeng ZHUANG Yan LüHai CHEN Mingqi WANG Xing | 2023 | Journal of Traditional Chinese Medicine2023，43，2： | 3 |
| 3 | L^p( [0, 1])-characterizations of multi-knot piecewise linear spectral sequences显示文摘在那里存在其指数的部分是明智的线性功能叫了的多结片的 L 2([0,1]), 的新 orthonormal 基础的一个班光谱序列。在这篇论文,我们证明这些底组成底,然而并非无条件的底,为 L p ([0,1])with 1 <
p <
∞
, p≠2。另外,我们在 L p ,Carleson 狩猎定理在上几乎到处,与这些有关的集中, Littlewood-Paley 定理和泊松求和公式基于…… | LIAN Qiaofang CHENG Linfeng YAN Dunyan | 2006 | Progress in Natural Science:Materials International2006，16，7： | 3 |
| 4 | Remifentanil protects liver against ischemia/reperfusion injury through activation of anti-apoptotic pathways显示文摘 | Ge Zhao Xin Shen Haiyan Nan Linfeng Yan Haikang Zhao Jun Yu Yi Lv | 2013 | Journal of Surgical Research2013，，2： | 1 |
| 5 | Freeze-drying and hot-pressing strategy to embed two-dimensional Ti_(0.87)O_(2) monolayers in commercial polypropylene films with enhanced dielectric properties显示文摘The dielectric capacitor has been widely used in advanced electronic and electrical power systems due to its capability of ultrafast charging–discharging and ultrahigh power density.Nevertheless,its energy density is still limited by the low dielectric constant(≈2.2)of the commercial dielectric polypropylene(PP).The conventional enhancement strategy by embedding inorganic fillers in PP matrix is still difficult and challenging due to that PP hardly dissolves in any inorganic/organic solvent.In this work,we develop a new strategy including freeze-drying,surface functionalization,and hot-pressing to incorporate Ti_(0.87)O_(2) monolayers in PP film.A series of uniform composited Ti_(0.87)O_(2)@PP film has been successfully fabricated with Ti0.87O2 content range of 0–15 wt%.The maximum dielectric constant of the as-prepared Ti_(0.87)O_(2)@PP film is 3.27 when the Ti_(0.87)O_(2) content is 9 wt%,which is about 1.5 times higher than that of pure PP.Our study provides a feasible strategy to embed two-dimensional material into commercial PP thin-film with superior dielectric performance for practical application. | Wenchao Tian Fei Yan Cailing Cai Zeyi Wu Chenchen Zhang Ting Yin Sijia Lao Linfeng Hu | 2021 | Journal of Advanced Ceramics2021，10，2： | 1 |
| 6 | Thin SnO2 nanowires with uniform diameter as excellent field emitters:a stability of more than 2 400 minutes显示文摘 | FANG Xiaosheng YAN Jian HU Linfeng | | 0，，： | 1 |
| 7 | Quasi-equality constrained risk-sensitive filtering for nonlinear discrete-time systems显示文摘More and more data fusion models contain state constraints with valuable information in the filtering process. In this study, an optimal filter of risk-sensitive with quasi-equality constraints is formulated using the reference probability method. Through recursion processes of probability density acquired from the probability measure change, the derived algorithm is optimal in the sense of the risk-sensitive parameter. The system and constraint models are consistent in statistics. Simulation results show that it is more robust and efficient than projection filters for the worst-case of noises and model uncertainty. | Linfeng SHEN, Yan LIN School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China | 2012 | 控制理论与应用(英文版)2012，10，2： | 1 |
| 8 | Ultra- high external quantum efficiency from thin SnO2 nanowire ultraviolet photodetectors显示文摘 | Hu Linfeng Yan Jian Liao Meiyong | 2011 | Small2011，7，8： | 1 |
| 9 | Broadband complex permeability characterization of magnetic thin films using shorted microstrip transmission-line perturbation显示文摘 | Liu Yan Chen Linfeng Tan C Y | 2005 | Rev Sci Instrum2005，76，06： | 1 |
| 10 | Effect of 5%glycolic acid complex and 20%glycolic acid on mild-to-moderate facial acne vulgaris显示文摘To the Editor:Acne vulgaris is a chronic,inflammatory,and disfiguring skin disease with lesions,post-inflammatory hyperpigmentation,and scarring.Chemical peeling is a simple and well-tolerated procedure for mild-to-moderate acne.Glycolic acid(GA)is water-soluble and has the smallest molecular weight among all the alpha-hydroxy acids.High-concentration GA(20%–70%),applied at 2 to 4-week intervals in the hospital or cosmetology clinic,have proved effective for acne.[1]Low-concentration GA(10%)is safe and convenient,and can be used at home.[2]Up to now,differences in efficiency between low and high concentrations of GA for acne vulgaris have not been reported.This study compared the efficacy and safety of 5%GA complex and 20%GA for acne patients,to guide GA selection at different concentrations. | Jian Zhao Boyang Zhou Yan Hou Linfeng Li Fenglin Zhuo | 2022 | Chinese Medical Journal2022，135，21： | 0 |
| 11 | Effects of Fleckvieh on the Performance of Dual-Purpose Cattle Improved by Hybridization with Local Beef Cows显示文摘[Objective] The paper aimed to study the improved effect of local beef cattle with Fleckvieh cattle and provide theoretical basic data for local cattle industry in central plain agricultural area in China. [Method] With 500 local beef cattle as female parents and Fleckvieh cattle as male parents,hybridization improvement was conducted via artificial insemination. The growth performance,slaughter performance,milk performance and milk components of F1 and F2 hybrids were measured. [Result] The birth body weights of F2 were significantly higher than those of local beef cow,but there was no remarkable difference between F1 and local beef cow or F1 and F2. The growth rates of F1 and F2 at different stages were higher than those of local beef cattle. The slaughter performance,such as carcass weight( P < 0. 05),dressing percentage,net meat rate( P < 0. 05),marbling score of F1 and F2 were higher than those of local beef cow. Milk production performance,such as actual milk yield,305 d corrected milk yield and 4% standard milk yield of F2 were signally higher than those of F1 and local beef cattle( P< 0. 05),and F1 was markedly higher than local beef cattle( P < 0. 05). For milk composition,although milk fat percentage,milk protein rate,lactose rate and total solids( TS) of F1 and F2 were slightly lowered compared with local beef cattle at varying degrees,they were still at high levels compared with Holstein cows.[Conclusion]Fleckvieh cattle,as a male parent,can significantly improved growth performance,slaughter performance and milk performance of offsprings. It would also increases the economic efficiency of local beef cattle by higher quality and price,as well as changing production model from beef to dual purpose of beef and milk. | Wang Linfeng Yang Gaiqing Lian Hongxia Yan Ping Liu Xian Liu Yan Wang Wenhui Zhu Ruiguang Li Ming Yang Guoyu | 2015 | Animal Husbandry and Feed Science2015，7，6： | 0 |
| 12 | Cryo-EM structure of L-fucokinase/GDP-fucose pyrophosphorylase(FKP)in Bacteroides fragilis显示文摘Dear Editor,L-Fucose(6-deoxy-L-galactose,fucose)is the basic compone nt of a variety of glyca n structures.The fucosylated oligosaccharides participate in a variety of cellular activities,like the cell-cell recognition,selectin-mediated leukocyteendothelial adhesion and the formation of Lewis blood group antigens(Ma et al.,2006).GDP-fucose is an important fucose donor in the process of fucosylated oligosaccharides formation.Two pathways of GDP-fucose synthesis are present in the cytosol of mammalian cells,including the de novo pathway and the salvage pathway(Becker et al.,2003).In the salvage pathway,cells use fucose from the extracellular or lysosomal sources to synthesize GDP-fucose. | Ying Liu Huifang Hu Jia Wang Qiang Zhou Peng Wu Nieng Yan Hong-Wei Wang Jia-Wei Wu Linfeng Sun | 2019 | Protein & Cell2019，10，5： | 0 |
| 13 | Preparation and Characterization of Glass-Ceramic Basalt Fiber显示文摘Basalt fiber(BF)is widely applied in the construction industry to improve the mechanical properties of construction materials.Recent studies show that BF has the potential to further enhance its performance via a crystallization approach.In this work,the glass-ceramic basalt fibers(GCBFs)were prepared through nucleation and crystallization treatments according to the crystallization kinetics calculations.Results from XRD and SEM show that GCBFs have main crystalline phases of Diopside and Augite reach crystallinity of around 46%±10%.In particular,the GCBFs sample with the largest mean crystal size maintains the lowest tensile strength of~197 MPa(compared with the pristine BFs of~737 MPa).Moreover,the weight loss and ion dissolution of GCBFs were explored in seawater environments and it was investigated that,GCBFs have better anti-seawater corrosion than the pristine BFs and have the potential to apply in the marine industry. | Lida Luo Tan Yan Jin Liu Linfeng Ding Qingwei Wang Wan Jiang | 2022 | Journal of Harbin Institute of Technology(New Series)2022，29，6： | 0 |
| 14 | BCI+VR Rehabilitation Design of Closed-Loop Motor Imagery Based on the Degree of Drug Addiction显示文摘After abusing drugs for long,drug users will experience deteriorated self-control cognitive ability,and poor emotional regulation.This paper designs a closed-loop virtual-reality(VR),motorimagery(MI)rehabilitation training system based on brain-computer interface(BCI)(MI-BCI+VR),aiming to enhance the self-control,cognition,and emotional regulation of drug addicts via personalized rehabilitation schemes.This paper is composed of two parts.In the first part,data of 45 drug addicts(mild:15;moderate:15;and severe:15)is tested with electroencephalogram(EEG)and near-infrared spectroscopy(NIRS)equipment(EEG-NIRS)under the dual-mode,synchronous signal collection paradigm.Using these data sets,a dual-modal signal convolutional neural network(CNN)algorithm is then designed based on decision fusion to detect and classify the addiction degree.In the second part,the MIBCI+VR rehabilitation system is designed,optimizing the Filter Bank Common Spatial Pattern(FBCSP)algorithm used in MI,and realizing MI-EEG intention recognition.Eight VR rehabilitation scenes are devised,achieving the communication between MI-BCI and VR scene models.Ten subjects are selected to test the rehabilitation system offline and online,and the test accuracy verifies the feasibility of the system.In future,it is suggested to develop personalized rehabilitation programs and treatment cycles based on the addiction degree. | Xuelin Gu Banghua Yang Shouwei Gao Honghao Gao Linfeng Yan Ding Xu Wen Wang | 2022 | China Communications2022，19，2： | 0 |
| 15 | New algorithm of exact sampling with directional threshold显示文摘Although it is known that exact sampling algorithm is easy to construct and less sensitive to noise,the samples distribution of the algorithm deviates from the target states distribution due to the local dependent coupling problem.A new algorithm,named exact sampling with directional threshold(ES-DT) is introduced.The main advantage of the new algorithm,in comparison with the traditional exact sampling algorithm,is that it can control the sampling with a rejection strategy in Markov chain during the path growth,and closely approach the ideal distribution based on maintaining the target density.Simulation experiments show the effectiveness of the proposed algorithm. | Linfeng Shen Yan Lin | 2010 | Journal of Systems Engineering and Electronics2010，21，2： | 0 |
| 16 | Epidemiological characteristics of all-cause mortality reviewing out-hospital death under the clouds of COVID-19显示文摘TotheEditor:Coronavirus disease2019(COVID-19)has rapidly become a great global infection and broughtabout a wide range of health consequences,including a high number of deaths due to continuous spread. | Linfeng Li Weidong Yan Yongqing Wang Dezhi Chen Yuanchang Qiao Min Liu Bin Cong Libing Yun | 2022 | Chinese Medical Journal2022，135，17： | 0 |
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