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| 1 | Study on effectiveness evaluation of weapon systems based on grey relational analysis and TOPSIS显示文摘To evaluate the effectiveness of weapon systems, the advantages and disadvantages of grey relational analysis and TOPSIS for multiattribute decision-making is pointed out, and an effectiveness evaluation model of weapon systems by combining grey relational analysis and TOPSIS is proposed. The model aggregates the grey relational grade and the distance to a new integrated closeness and reflects not only the trend but also the situation of the alternative. The example illuminates that the model is effective for the effectiveness evaluation of weapon systems. | Gu Hui Song Bifeng | 2009 | Journal of Systems Engineering and Electronics2009，20，1： | 53 |
| 2 | Research and application of enterprise resource planning system for foundry enterprises显示文摘PPDB issues-four aspects of current management issues of foundry enterprises are discussed in this paper,including Production Management,Process Control,Duration Monitoring and Business Intelligence Data Analysis.Also a whole Enterprise Resource Planning(ERP) solution for foundry enterprises is proposed.The solution contains many models,four of which are used to solve the PPDB issues.These are called SPDB models,which separately are the Single-piece management model(based on casting lifecycle),Process management model(based on task-driven technology),Duration monitoring model(based on surplus period),and Business intelligence data analysis model(based on data mining).An ERP system for foundry enterprises,named HZERP,was researched and developed,and applied to a sand casting company of single piece and small batch production.Qualitatively and quantitatively comparing the application effect before and after implementing the HZERP system,the result demonstrated that the foundry ERP system based on the SPDB models can help metal casting enterprises achieve the single-piece management,better regulate the production processes,improve production and delivery management,shorten the production cycle,reduce costs,and speed up the capital turnover to a large extent. | Zhou Jianxin Ji Xiaoyuan Liao Dunming Guan Bifeng Guan Bihong Pang Shengyong Tang Hongtao | 2013 | China Foundry2013，10，1： | 16 |
| 3 | Loss of 5-hydroxymethylcytosine is linked to gene body hypermethylation in kidney cancer显示文摘5-methylcytosine (5mC ) 和它的氧化形式 5-hydroxymethylcytosine (5hmC ) 被建议了涉及 tumorigenesis。因为印射方法的广泛地使用的 5mC 的读出,定序的重亚硫酸盐(BS-seq ) ,是 5mC 的和, 5hmC 层次, 5mC/5hmC 模式和这二修正的关系仍然保持糟糕理解。由介绍真实 5mC (BS-seq 由帮助 Tet 的 BS-seq 改正了, TAB-seq ) 并且 5hmC (TAB-seq ) 在单个核苷酸的分辨率同时铺平,我们这里证明与匹配的正常纸巾相比没有在肾肿瘤的 5mC 的全球损失。相反地, 5hmC 全球性被失去在几乎所有肾肿瘤纸巾。在肿瘤纸巾的 5hmC 水平是为肾癌症的一个独立预示的标记,与与更短的全面幸存联系的 5hmC 的底层。而且,我们证明 5hmC 的损失与匹配的正常纸巾相比在肿瘤被连接到 hypermethylation,特别地在基因身体区域。惊人地,基因身体 hypermethylation 显著地与肿瘤相关的基因的 silencing 被联系。IDH1 的 Downregulation 作为在肾癌症位于 5hmC 损失下面的机制被识别。恢复 5hmC 层次稀释了肿瘤房间的侵略能力并且在一个异种皮移植模型压制了肿瘤生长。一起,我们的结果证明 5hmC 的损失在由改变 DNA methylation 模式的肾癌症是一个预示的标记和一个 oncogenic 事件。 | Ke Chen Jing Zhang Zhongqiang Guo Qin Ma Zhengzheng Xu Yuanyuan Zhou Ziying Xu Zhongwu Li Xiongjun- Ye Xuesong Li Bifeng Yuan Yuwen Ke Chuan He Liqun Zhou Jiang Liu WeiminCi | 2016 | Cell Research2016，26，1： | 10 |
| 4 | Research of optical rainfall sensor based on CCD linear array显示文摘Rainfall monitoring is one of the most important meteorological observation elements for the disaster weather. The maintenance of current tipping bucket rain gauge and weighing type rain gauge is a critical issue. The optical rainfall sensor based on CCD linear array is mainly studied in this paper. Because of the maintenance-free time and good adaptability,it can be widely used in the automatic rainfall monitoring in severe environment and have a good perspective in using. | YANG Bifeng LIU Yuyan LU Ying WU Shangqian | 2015 | Instrumentation2015，2，3： | 9 |
| 5 | Research of low boom and low drag supersonic aircraft design显示文摘Sonic boom reduction will be an issue of utmost importance in future supersonic transport, due to strong regulations on acoustic nuisance. The paper describes a new multi-objective optimization method for supersonic aircraft design. The method is developed by coupling Seebass–George–Darden(SGD) inverse design method and multi-objective genetic algorithm.Based on the method, different codes are developed. Using a computational architecture, a conceptual supersonic aircraft design environment(CSADE) is constructed. The architecture of CSADE includes inner optimization level and out optimization level. The low boom configuration is generated in inner optimization level by matching the target equivalent area distribution and actual equivalent area distribution. And low boom/low drag configuration is generated in outer optimization level by using NSGA-II multi-objective genetic algorithm to optimize the control parameters of SGD method and aircraft shape. Two objective functions, low sonic boom and low wave drag, are considered in CSADE. Physically reasonable Pareto solutions are obtained from the present optimization. Some supersonic aircraft configurations are selected from Pareto front and the optimization results indicate that the swept forward wing configuration has benefits in both sonic boom reduction and wave drag reduction. The results are validated by using computational fluid dynamics(CFD) analysis. | Feng Xiaoqiang Li Zhanke Song Bifeng | 2014 | Chinese Journal of Aeronautics2014，27，3： | 9 |
| 6 | Aerodynamic performance enhancement forflapping airfoils by co-flow jet显示文摘Introducing active flow control into the design of flapping wing is an effective way to enhance its aerodynamic performance.In this paper,a novel active flow control technology called Co-Flow Jet(CFJ)is applied to flapping airfoils.The effect of CFJ on aerodynamic performance of flapping airfoils at low Reynolds number is numerically investigated using Unsteady Reynolds Averaged Navier-Stokes(URANS)simulation with Spalart-Allmaras(SA)turbulence model.Numerical methods are validated by a NACA6415-based CFJ airfoil case and a S809 pitching airfoil case.Then NACA6415 baseline airfoil and NACA6415-based CFJ airfoil with jet-off and jet-on are simulated in flapping motion,with Reynolds number 70,000 and reduced frequency 0.2.As a result,CFJ airfoils with jet-on generally have better lift and thrust characteristics than baseline airfoils and jet-off airfoil when Cμgreater than 0.04,which results from the CFJ effect of reducing flow separation by injecting high-energy fluid into boundary layer.Besides,typical kinematic and geometric parameters,including the reduced frequency and the positions of the suction and injection slot,are systematically studied to figure out their influence on aerodynamic performance of the CFJ airfoil.And a variable Cμjet control strategy is proposed to further improve effective propulsive efficiency.Compared with using constant Cμ,an increase of effective propulsive efficiency by22.6%has been achieved by using prescribed variable CμNACA6415-based CFJ airfoil at frequency 0.2.This study may provide some guidance to performance enhancement for Flapping wing Micro Air Vehicles(FMAV). | Tao WU Bifeng SONG Wenping SONG Wenqing YANG Zhonghua HAN | 2020 | Chinese Journal of Aeronautics2020，33，10： | 7 |
| 7 | The effects of span-wise and chord-wise flexibility on the aerodynamic performance of micro flapping-wing显示文摘The flexibility of flapping-wing strongly affects the aerodynamic performance of Flapping-wing Micro Air Vehicle (FMAV),and the deformations in span-wise and chord-wise directions are coupled together in flight.In this study,the flexible deformation is formulated in span-wise and chord-wise separately in order to analyze its effects on aerodynamic behavior.The preconditioned Navier-Stokes equations based on chimera grid are used in the computational fluid dynamics method to study the aerodynamic effects caused by flexible deformation,and the simulation results are compared with experimental test to illustrate the capability of above method.Based on our results,it is clearly showed that the span-wise flexible deformation should be limited in a small range to achieve higher aerodynamic performance and the chord-wise deformation could enhance the aerodynamic performance.The results also suggest that FMAV designers should design the flapping-wing with high stiffness leading edge to limit the span-wise deformation,and more flexible chord ribs to keep chord-wise deformation in suitable range. | YANG WenQing SONG BiFeng SONG WenPing WANG LiGuang | 2012 | Chinese Science Bulletin2012，57，22： | 6 |
| 8 | Far-field sonic boom prediction considering atmospheric turbulence effects: An improved approach显示文摘Accurate prediction of sonic boom is one of key challenges for the design of a low-boom supersonic aircraft. For most of available far-field prediction methods, the effect of atmospheric turbulence appearing in the planetary boundary layer cannot be considered, which results in remarkable inaccuracy of predicting ground-level sonic boom waveform. Although some efforts have been made to overcome the shortcoming, the turbulence effects are not yet well described so far. This article proposes an improved method by extending the two-dimensional Heterogeneous One-Way Approximation for the Resolution of Diffraction(HOWARD) equation to account for the axial and transverse convections of wind fluctuation as well as the effect of temperature fluctuation. The proposed method is validated by comparing the predictions with the flight-test data of JAXA D-SEND#1 LBM, which shows that the result of the proposed method is in better agreement with the flight-test data than that of the method without considering atmospheric turbulence effects.Then, distortion mechanism of sonic boom waveforms caused by atmospheric turbulence is analyzed by using the proposed method. It is indicated that the effect of turbulent convection makes uniform sonic-boom wavefronts irregular, which creates the condition of diffraction effect to perturb waveforms. Finally, the proposed method is applied to investigate the behavior of two types of waveforms given by the sonic boom minimization theory. Results show that a far-field waveform with a weaker initial shock is more beneficial for low-boom design of a supersonic aircraft. | Jianling QIAO Zhonghua HAN Liwen ZHANG Wenping SONG Bifeng SONG | 2022 | Chinese Journal of Aeronautics2022，35，9： | 4 |
| 9 | Landing route planning method for micro drones based on hybrid optimization algorithm显示文摘Aiming at the obstacle avoidance trajectory planning problem in the landing process of the micro drone,this paper proposes a swarm optimization algorithm that combines the dragonfly optimization method and the differential evolution method.The orthogonal learning mechanism is adopted to realize the adaptive switch between the two algorithms.In the process of landing route planning,the planning plane is first obtained by making the gliding plane tangent to the obstacle.In the planning plane,the projection of obstacle is transformed into multiple unreachable line segments.By designing an optimization model,the 3D landing route planning problem is transformed into a 2D obstacle avoidance route optimization problem.Taking the shortest route as the optimization objective,the penalty factor is introduced into the cost function to avoid the intersection of the landing route and obstacle.During the optimization process,through the orthogonal learning of the intermediate iterative results,the hybrid algorithm can adaptively select the next iterative algorithm,so it can give full play to the respective advantages of the two algorithms.The optimization results show that,compared with the single optimization algorithm,the hybrid optimization algorithm proposed in this paper can better solve the problem of landing route planning for micro-small UAVs. | Liang Shaoran Song Bifeng Xue Dong | 2021 | Biomimetic Intelligence & Robotics2021，1，1： | 3 |
| 10 | Improved method for subsystems performance trade-off in system-of-systems oriented design of UAV swarms显示文摘For the rapidly developing unmanned aerial vehicle(UAV)swarm,the system-of-systems(SoS)oriented design is a prospective conceptual design methodology due to the competence for complex mission requirements and subsystems interactions.In the SoS oriented design,the subsystems performance trade-off is the basis of design decisions.In the trade-off for surveillance missions,most previous works do not consider track reporting and mainly focus on the design of platforms.An improved method for the subsystems performance trade-off in the SoS oriented UAV swarm design is proposed.Within an improved design framework with subsystems disaggregation,this method is characterized by treating platforms,sensors,and communications as equally important subsystems,integrating operational strategies into the trade-off,and enabling the trade-off for track reporting.Those advantages are achieved by a behavior-based modular model structure for agent-based operational modeling and simulation.In addition,a method of analyzing the bounds of the communication range is also presented.Simulation experiments are conducted by using precision-based simulation replication rules and surrogate modeling methods.The results demonstrate the effectiveness of the proposed method,and show that the configuration of area partitioning changes the trade space of subsystems performances,indicating the necessity of integrating operational strategies into the conceptual design. | ZHANG Ruiwen SONG Bifeng PEI Yang YUN Qijia | 2019 | Journal of Systems Engineering and Electronics2019，30，4： | 3 |
| 11 | Aerodynamic performance of owl-like airfoil undergoing bio-inspired flapping kinematics显示文摘Natural flyers have extraordinary flight skills and their prominent aerodynamic performance has attracted a lot of attention.However,the aerodynamic mechanism of birds’flapping wing kinematics still lacks in-depth understanding.In this paper,the aerodynamic performance of owl-like airfoil undergoing bio-inspired flapping kinematics extracted from a free-flying owl wing has been numerically investigated.The overset mesh technique is used to deal with the large range movements of flapping airfoils.The bio-inspired kinematics consist of plunging and pitching movement.A pure sinusoidal motion and a defined motion composed of plunging of sinusoidal motion and pitching of the bio-inspired kinematics are selected for comparison.The other two NACA airfoils are also selected to figure out the advantages of the owl-like airfoil.It is found that the cambered owl-like airfoil can enhance lift during the downstroke.The bio-inspired kinematics have an obvious advantage in lift generation with a presence of higher peak lift and positive lift over a wider proportion of the flapping cycle.Meanwhile,the bio-inspired motion is more economical for a lower power consumption compared with the sinusoidal motion.The sinusoidal flapping motion is better for thrust generation for a higher peak thrust value in both upstroke and downstroke,while the bio-inspired kinematics mainly generate thrust during the downstroke but produce more drag during the upstroke.The defined motion has similar lift performance with the bio-inspired kinematics,while it consumes more energy and generates less thrust.The unsteady flow field around airfoils is also analyzed to explain the corresponding phenomenon.The research in this paper is helpful to understand the flight mechanism of birds and to design a micro air vehicle with higher performance. | Xinyu LANG Bifeng SONG Wenqing YANG Wenping SONG | 2021 | Chinese Journal of Aeronautics2021，34，5： | 2 |
| 12 | Analytical methods for locating modifications in nucleic acids显示文摘In addition to the canonical nucleobases, a variety of chemical modifications have been identified presence in nucleic acids. These modifications have been demonstrated to involve in regulating the spatiotemporal expression of genes. Up to date, over 150 types of chemical modifications have been found existence in nucleic acids. Understanding the functional roles of modifications relies on deciphering the location information of modifications in nucleic acids. Analytical methods for studying nucleic acid modifications have greatly advanced in the last decade. To locate the modifications in nucleic acids, various mass spectrometry (MS)-based analytical strategies have been established. Recent progress in next-generation sequencing (NGS) in conjugation with immunoprecipitation, chemical reaction, enzyme-mediated mutation, or nanomaterials offer genome-wide or transcriptome-wide mapping of modifications, which greatly revolutionize the field of epigenetic modifications. Herein, we reviewed and summarized the established methods and the breakthrough of the techniques for locating modifications in nucleic acids. In addition, we discussed the principles, applications, advantages and drawbacks of these methods. We believe that with the rapid advancement of techniques and methods,the functions of nucleic acid modifications will be fully understood in the future. | Chubo Qi Jianghui Ding Bifeng Yuan Yuqi Feng | 2019 | Chinese Chemical Letters2019，30，9： | 2 |
| 13 | Ultrafast dynamics of o-fluorophenol studied with femtosecond time-resolved photoelectron and photoion spectroscopy显示文摘The ultrafast dynamics of o-fluorophenol via the excited states has been studied by femtosecond time-resolved photoelectron imaging. The photoion and photoelectron spectra taken with a time delay between 267 nm pump laser and 800 nm probe laser provide a longer-lived S1 electronic state of about ns timescale. In comparison,the spectra obtained by exciting the S2 state with femtosecond laser pulses at 400 nm and ionizing with pulses at 800 nm suggest that the S2 state has an ultrashort lifetime about 102 fs and reflects the internal conversion dynamics of the S2 state to the S1 state. | ZHENG QiuSha 1,2 ,QIN ChaoChao 1,2 ,LONG JinYou 1,2 ,TANG BiFeng 3 ,ZHANG Song 1,2* & ZHANG Bing 1,2 1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences,Wuhan 430071,China 2 Graduate University of the Chinese Academy of Sciences,Beijing 100049,China 3 Department of Physics,Xiaogan University,Xiaogan 432000,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，6： | 2 |
| 14 | Two general methods for calculating the aircraft equivalent singly vulnerable area 显示文摘 | PEI Yang SONG Bifeng | 2006 | Journal of Aircraft2006，43，5： | 1 |
| 15 | Different structural origins for different sized surface pits observed on a-plane GaN film显示文摘A correlation study between the observed surface morphology using high-resolution scanning electron microscopy(HRSEM) and the observed structural imperfections using transmission electron microscopy(TEM) has been conducted for a-plane Ga N. There are three different sized asymmetric surface pits: large pit of 500 nm–2 ?m in side length, medium pit of 50 nm in side length, and small pit with side lengths of less than 5 nm, which originate from incomplete island coalescence, screw dislocation, and partial dislocation(PD), respectively. Both screw dislocation and PD can produce pits on the free surface because they have a perpendicular line tension to the surface, which must remain in balance with the surface tension. The two types of dislocation lead to distinctive pit sizes because the PD has a smaller Burgers vector component along the dislocation line than the pure screw dislocation. A pit that is produced in the island-coalescing process is much larger than those caused by dislocations because island coalescence is a kinetic process that involves large-scale mass transportation, whereas the dislocation mediates the surface in the local area. These three types of surface pits sometimes interact with one another in space. The coalescence of the island determines the surface morphology at large scales, whereas the defects affect the details. | GAO ZhiYuan LI JiangJiang XUE XiaoWei CUI BiFeng XING YanHui ZOU DeShu | 2016 | Science China(Technological Sciences)2016，59，1： | 1 |
| 16 | Aircraft vulnerable area decomposition method in the overlapping region of components显示文摘 | PEI Yang SONG Bifeng | 2006 | Journal of Aircraft2006，43，4： | 1 |
| 17 | Fast mi- eroextraetion of phthalate acid esters from beverage, envi-ronmental water and perfume samples by magnetic multi - walled carbon nanotubes 显示文摘 | LUO Yanbo YU Qiongwei YUAN Bifeng | 2012 | Talanta2012，90，： | 1 |
| 18 | Exploring Optimum Power Unit of Propulsion System for High Altitude Airship 显示文摘 | Chen Shengqi Song Bifeng Wang Haifeng | 2015 | Journal of Aerospace Engineering2015，229，2： | 1 |
| 19 | Study in the design and manufacture process of the elastic cable anchor box in steel box girder of Taizhou Bridge显示文摘Taizhou Yangtze River Highway Bridge is a large span suspension bridge with three pylons. The elastic cables are installed to connect the steel tower and the steel box girder. The constraints can increase the safety coefficient of the middle saddle, and improve the stress conditions of the middle pylon and decrease the deflection in the middle of the main girder, as well as the longitudinal displacement of the main girder caused by live loads. The anchorage boxes of the elastic cable are installed in the wind fairing outside the vertical web plate of the box girder. Two anchor boxes form a pair and are arranged parallelly. Eight anchor boxes are installed in the bridge. In this paper, the design scheme and the technical difficulties in manufacturing are briefly discussed with the precision control techniques. | Gu Bifeng Chen Ce Ding Lei | 2011 | Engineering Sciences2011，9，2： | 1 |
| 20 | Study of streptavidin coated onto PAMAM dendrimer modified magnetite nanoparticles显示文摘 | FENG G BIFENG P HONGCHEN G | 2005 | JMag Mag Mat2005，293，1： | 1 |
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