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| 1 | Quasi-static tensile deformation and fracture behavior of a highly particle-filled composite using digital image correlation method显示文摘Polymer bonded explosives (PBXs) are highly particle-filled composite materials.This paper experimentally studies the tensile deformation and fracture behavior of a PBX simulation by using the semi-circular bending (SCB) test.The deformation and fracture process of a pre-notched SCB sample with a random speckle pattern is recorded by a charge coupled device camera.The displacement and strain fields on the observed surface during the loading process are obtained by using the digital image correlation method.The crack opening displacement is calculated from the displacement fields,the initiation and propagation of the crack are analyzed.In addition,the damage evolution and fracture mechanisms of the SCB sample are analyzed according to the strain fields and the correlation coefficient fields at different loading steps. | Zhongbin Zhou,Pengwan Chen,Baoqiao Guo,Zhuoping Duan,and Fenglei Huang State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China | 2011 | Theoretical & Applied Mechanics Letters2011，1，5： | 5 |
| 2 | A novel random phase-shifting digital holographic microscopy method显示文摘This paper proposes a new method that reconstructs the information of specimen by using random phase shift step in digital holographic microscopy (DHM). The principles of the method are described and discussed in detail. In practical experiment, because the phase shifter is neither perfectly linear nor calibrated, digital holograms with inaccurate phase shift step are recorded by the charge-coupled device (CCD). The phase could be accurately reconstructed from the recorded digital holograms by using the random phase-shifting algorithm, which makes up for reconstructed phase error caused by ordinary phase-shifting algorithm. The phase aberration compensation is also discussed. In order to verify the flexibility of the proposed method, numerical simulation of random phase-shifting DHM was carried out. The simulation results illustrated that the presented method is effective when the phase shift step is unknown or random in DHM. | HuiMin Xie ZhenXing Hu FuLong Dai YanJie Li PengWan Chen QingMing Zhang FengLei Huang | 2009 | Science China(Technological Sciences)2009，52，7： | 3 |
| 3 | Self-templated formation of cobalt-embedded hollow N-doped carbon spheres for efficient oxygen reduction显示文摘The slow kinetics at the cathode of oxygen reduction reaction(ORR)seriously limits the efficiencies of fuel cells and metal-air batteries.Pt,the state-of-the-art ORR electrocatalyst,suffers from high cost,low earth abundance,and poor stability.Here a self-templated strategy based on metal-organic frameworks(MOFs)is proposed for the fabrication of hollow nitrogen-doped carbon spheres that are embedded with cobalt nanoparticles(Co/HNC).The Co/HNC manifests better ORR activities,methanol tolerance,and stability than commercial Pt/C.The high ORR performance of Co/NHC can be attributed to the hollow structure which provides enlarged electrochemically active surface area,the formation of more Co-N species,and the introduction of defects.This work highlights the significance of rational engineering of MOFs for enhanced ORR activity and stability and offers new routes to the design and synthesis of high-performance electrocatalysts. | Ayaz Mahsud Jianian Chen Xiaolei Yuan Fenglei Lyu Qixuan Zhong Jinxing Chen Yadong Yin Qiao Zhang | 2021 | Nano Research2021，14，8： | 2 |
| 4 | Multi-level modulation scheme based on PAK algorithm for optical camera communications显示文摘In an optical camera communication(OCC) system, multi-level modulation is essential for data rate enhancement with the finite frame rate of the receiving camera constraint, where the K-means algorithm is widely used as a thresholding scheme. The result of K-means clustering is sensitive to initial cluster centers. In this paper, we propose a multi-level modulation scheme utilizing the pilot-aided K-means(PAK) algorithm. PAK algorithm innovates in both obtaining the state of the stripes propagated through the optical channel under different environments and overcoming the susceptibility of K-means. Our scheme could prompt data rate and improve the performance of OCC. Finally, non-orthogonal multiple access(NOMA) pattern is designed based on the proposed scheme to achieve multiplex communications. | WU Jing CHI Xuefen JI Fenglei JIANG Keyu CHEN Shaoqi LI Shuai | 2022 | Optoelectronics Letters2022，18，3： | 2 |
| 5 | Simulation-based optimization of control policy on multi-echelon inventory system for fresh agricultural products显示文摘As fresh agricultural products are perishable and vulnerable,reducing inventory cost is a strategic target for supply chain enterprises.How to design a reliable multi-echelon inventory control policy is still a great challenge.Therefore,the inventory cost of a three-level fresh agricultural products inventory system was firstly mathematically analyzed.Then,the simulation-based optimization model of the multi-echelon inventory system for fresh agricultural products was proposed by using the Flexsim simulation software and the improved particle swarm optimization algorithm.Finally,the multi-echelon inventory system is simulated based on a large number of survey data.Simulation results demonstrate that the proposed simulation-based optimization model of multi-echelon inventory system for fresh agricultural products can provide decision-making and technical support for the formulation of inventory control policy,and also it shows that the modeling of system simulation is an effective method to solve the problem of complex system. | Guangyin Xu Jihao Feng Fenglei Chen Heng Wang Zhenfeng Wang | 2019 | International Journal of Agricultural and Biological Engineering2019，12，2： | 2 |
| 6 | Microstructure, deformation and failure of polymer bonded explosives显示文摘 | Pengwan Chen Fenglei Huang Yansheng Ding | 2007 | Journal of Materials Science2007，，13： | 1 |
| 7 | Microstructure, deformation and failure of polymer bonded explosives显示文摘 | Pengwan Chen Fenglei Huang Yansheng Ding | 2007 | Journal of Materials Science2007，，13： | 1 |
| 8 | Microstructure, deformation and failure of polymer bonded explosives显示文摘 | Pengwan Chen Fenglei Huang Yansheng Ding | 2007 | Journal of Materials Science2007，，13： | 1 |
| 9 | Detection and characterization of long-pulse low-velocity impact damage in plastic bonded explosives显示文摘 | Pengwan Chen Fenglei Huang Kaida Dai Yansheng Ding | 2004 | International Journal of Impact Engineering2004，，5： | 1 |
| 10 | Recovery of Ni(Ⅱ)from real electroplating wastewater using fixed-bed resin adsorption and subsequent electrodeposition显示文摘Effective recovery of high-value heavy metals from electroplating wastewater is of great significance,but recovering nickel ions from real electroplating wastewater as nickel sheet has not been reported.In this study,the pilot-scale fixed-bed resin adsorption was conducted to recover Ni(Ⅱ)ions from real nickel plating wastewater,and then the concentrated Ni(Ⅱ)ions in the regenerated solution were reduced to nickel sheet via electrodeposition.A commercial cation-exchange resin was selected and the optimal resin adsorption and regeneration conditions were investigated.The resin exhibited an adsorption capacity of 63 mg/g for Ni(Ⅱ)ions,and the average amount of treated water was 84.6 bed volumes(BV)in the pilot-scale experiments.After the adsorption by two ion-exchange resin columns in series and one chelating resin column,the concentrations of Ni(Ⅱ)in the treated wastewater were below 0.1 mg/L.After the regeneration of the spent resin using 3 BVof 4%(w/w)HC1 solution,1.5 BV of concentrated neutral nickel solution(>30 g/L)was obtained and used in the subsequent electrodeposition process.Using the aeration method,alkali and water required in resin activation process were greatly reduced to 2 BV and 3 BV,respectively.Under the optimal electrodeposition conditions,95.6%of Ni(Ⅱ)in desorption eluent could be recovered as the elemental nickel on the cathode,llie total treatment cost for the resin adsorption and regeneration as well as the electrodeposition was calculated. | Tong Li Ke Xiao Bo Yang Guilong Peng Fenglei Liu Liyan Tao Siyuan Chen Haoran Wei Gang Yu Shubo Deng | 2019 | Frontiers of Environmental Science & Engineering2019，13，6： | 1 |
| 11 | Characterization of the condensed carbon in detonation soot显示文摘 | Chen Pengwan Huang Fenglei Yun Shourong | 2003 | Carbon2003，41，： | 1 |
| 12 | Microstructure, deformation and failure of polymer bonded explosives显示文摘 | Pengwan Chen Fenglei Huang Yansheng Ding | 2007 | Journal of Materials Science2007，，13： | 1 |
| 13 | Following StraightlyControl Strategy and Testing for Split Platform in Roadway显示文摘 | ZHAO Jingyi CHEN Fenglei GUO Rui | 2013 | Advanced Materials Research2013，619，： | 1 |
| 14 | A novel random phase-shifting digital holographic microscopy method显示文摘 | HuiMin Xie ZhenXing Hu FuLong Dai YanJie Li PengWan Chen QingMing Zhang FengLei Huang | | 0，2009，： | 1 |
| 15 | Galangin mitigates glucocorticoid-induced osteoporosis by activating autophagy of BMSCs via triggering the PKA/CREB signaling pathway显示文摘Glucocorticoid-induced osteoporosis(GIOP),one of the most common and serious adverse effects associated with glucocorticoid administration,manifests as decreased bone formation and increased bone resorption,eventually culminating in bone loss.Galangin(GAL)is a flavonoid extracted from the medicinal herbal galangal that possesses a variety of pharmacological activities and can inhibit osteoclastogenesis.However,the effects of GAL on GIOP remain unclear.Our study aims to explore the effects of GAL on GIOP in mice and the underlying mechanism.Our results show that GAL markedly mitigates the severity of dexamethasone(Dex)-induced osteoporosis in mice and potentiates osteogenic differentiation in mouse bone marrow-derived mesenchymal stem cells(BMSCs).Furthermore,GAL also significantly counteracts Dex-mediated suppression of osteogenic differentiation and autophagy in human BMSCs.GAL augments PKA/CREB-mediated autophagic flux in BMSCs and the bones of osteoporotic mice.GAL-mediated osteogenic differentiation in Dex-treated BMSCs is significantly decreased by the PKA inhibitor H89 and autophagy inhibitor 3-methyladenine.Collectively,our data indicate that GAL can ameliorate GIOP,partly by augmenting the mineralization of BMSCs by potentiating PKA/CREB-mediated autophagic flux,highlighting its potential therapeutic use in treating glucocorticoid-related osteoporosis. | Chenying Zeng Shan Wang Huimin Gu Fenglei Chen Ziming Wang Jinteng Li Zhongyu Xie Pei Feng Huiyong Shen Yanfeng Wu | 2023 | Acta Biochimica et Biophysica Sinica2023，55，8： | 0 |
| 16 | In situ surface-confined fabrication of single atomic Fe-N_(4) on N-doped carbon nanoleaves for oxygen reduction reaction显示文摘Controllable fabrication of Fe-N-C based single-atom catalysts(SACs)for enhanced electrocatalytic performance is highly desirable but still challenging.Here,an in situ surface-confined strategy was demonstrated for the synthesis of single atomic Fe-N_(4))on N-doped carbon nanoleaves(L-FeNC).The in situ generated Zn3[Fe(CN)6]2 could not only serve as a protection layer against collapse of nanoleaves but also provide abundant Fe source for the formation of Fe-N moieties during pyrolysis,leading to high surface area and high graphitization degree of L-FeNC simultaneously.Benefiting from abundant Fe-N_(4))active sites,enhanced mass and charge transfer,the as-prepared L-FeNC manifested a half-wave potential of 0.89 V for oxygen reduction reaction(ORR)in 0.1 M KOH.A maximum power density of 140 m W cm^(-2)and stable discharge voltage even after operation for 50,000 s have been demonstrated when the L-FeNC was used as air cathode for Zn-air battery.This work not only provided a unique surfaceconfined strategy for the synthesis of two-dimensional nanocarbons,but also demonstrated the significant benefit from rational design and engineering of Fe-N-C SACs,thus offering great opportunities for fabrication of efficient energy conversion and storage devices. | Xiaojing Jiang Jianian Chen Fenglei Lyu Chen Cheng Qixuan Zhong Xuchun Wang Ayaz Mahsud Liang Zhang Qiao Zhang | 2021 | Journal of Energy Chemistry2021，30，8： | 0 |
| 17 | Asymmetric GARCH type models for asymmetric volatility characteristics analysis and wind power forecasting显示文摘Wind power forecasting is of great significance to the safety, reliability and stability of power grid. In this study, the GARCH type models are employed to explore the asymmetric features of wind power time series and improved forecasting precision. Benchmark Symmetric Curve (BSC) and Asymmetric Curve Index (ACI) are proposed as new asymmetric volatility analytical tool, and several generalized applications are presented. In the case study, the utility of the GARCH-type models in depicting time-varying volatility of wind power time series is demonstrated with the asymmetry effect, verified by the asymmetric parameter estimation. With benefit of the enhanced News Impact Curve (NIC) analysis, the responses in volatility to the magnitude and the sign of shocks are emphasized. The results are all confirmed to be consistent despite varied model specifications. The case study verifies that the models considering the asymmetric effect of volatility benefit the wind power forecasting performance. | Hao Chen Jianzhong Zhang Yubo Tao Fenglei Tan | 2019 | Protection and Control of Modern Power Systems2019，4，1： | 0 |
| 18 | Data Matching of Solar Images Super-Resolution Based on Deep Learning显示文摘The images captured by different observation station have different resolutions.The Helioseismic and Magnetic Imager(HMI:a part of the NASA Solar Dynamics Observatory SDO)has low-precision but wide coverage.And the Goode Solar Telescope(GST,formerly known as the New Solar Telescope)at Big Bear Solar Observatory(BBSO)solar images has high precision but small coverage.The super-resolution can make the captured images become clearer,so it is wildly used in solar image processing.The traditional super-resolution methods,such as interpolation,often use single image’s feature to improve the image’s quality.The methods based on deep learning-based super-resolution image reconstruction algorithms have better quality,but small-scale features often become ambiguous.To solve this problem,a transitional amplification network structure is proposed.The network can use the two types images relationship to make the images clear.By adding a transition image with almost no difference between the source image and the target image,the transitional amplification training procedure includes three parts:transition image acquisition,transition network training with source images and transition images,and amplification network training with transition images and target images.In addition,the traditional evaluation indicators based on structural similarity(SSIM)and peak signal-to-noise ratio(PSNR)calculate the difference in pixel values and perform poorly in cross-type image reconstruction.The method based on feature matching can effectively evaluate the similarity and clarity of features.The experimental results show that the quality index of the reconstructed image is consistent with the visual effect. | Liu Xiangchun Chen Zhan Song Wei Li Fenglei Yang Yanxing | 2021 | Computers, Materials & Continua2021，，9： | 0 |
| 19 | Applicability of nonmetric multidimensional scaling to noise quality research显示文摘With loudness-equalized car interior noise as sound stimuli, the work focused on applicability of nonmetric multidimensional scaling (NMDS) to sound quality research. It is presented that NMDS is an effective tool for subjective assessment research of sound quality, when listeners are clustered through correlation between listeners. With this key clustering process, the perceptual structure of car interior noise with strong consistency is revealed. The results shown that: for car interior noise, ‘preference’ can be regarded as a main sub-dimension in ‘similarity’ space and listeners could be divided into two groups; For both groups of listeners, the perceptual ‘preference’ can be characterized as one-dimensional descriptor, with one group has a positive relation to ‘low-frequency’, while another group has a negative relation to ‘low-frequency’. | JIAO Fenglei CHEN Yaobin JIANG Jian GU Fengshou Andrew BALL MAO Dongxing | 2006 | Chinese Journal of Acoustics2006，25，3： | 0 |
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