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| 1 | Aerodynamic Design Methodology for Blended Wing Body Transport显示文摘This paper puts forward a design idea for blended wing body(BWB).The idea is described as that cruise point,maximum lift to drag point and pitch trim point are in the same flight attitude.According to this design idea,design objectives and constraints are defined.By applying low and high fidelity aerodynamic analysis tools,BWB aerodynamic design methodology is established by the combination of optimization design and inverse design methods.High lift to drag ratio,pitch trim and acceptable buffet margin can be achieved by this design methodology.For 300-passenger BWB configuration based on static stability design,as compared with initial configuration,the maximum lift to drag ratio and pitch trim are achieved at cruise condition,zero lift pitching moment is positive,and buffet characteristics is well.Fuel burn of 300-passenger BWB configuration is also significantly reduced as compared with conventional civil transports.Because aerodynamic design is carried out under the constraints of BWB design requirements,the design configuration fulfills the demands for interior layout and provides a solid foundation for continuous work. | LI Peifeng ZHANG Binqian CHEN Yingchun YUAN Changsheng LIN Yu | 2012 | Chinese Journal of Aeronautics2012，25，4： | 29 |
| 2 | Transformers in computational visual media:A survey显示文摘Transformers,the dominant architecture for natural language processing,have also recently attracted much attention from computational visual media researchers due to their capacity for long-range representation and high performance.Transformers are sequence-to-sequence models,which use a selfattention mechanism rather than the RNN sequential structure.Thus,such models can be trained in parallel and can represent global information.This study comprehensively surveys recent visual transformer works.We categorize them according to task scenario:backbone design,high-level vision,low-level vision and generation,and multimodal learning.Their key ideas are also analyzed.Differing from previous surveys,we mainly focus on visual transformer methods in low-level vision and generation.The latest works on backbone design are also reviewed in detail.For ease of understanding,we precisely describe the main contributions of the latest works in the form of tables.As well as giving quantitative comparisons,we also present image results for low-level vision and generation tasks.Computational costs and source code links for various important works are also given in this survey to assist further development. | Yifan Xu Huapeng Wei Minxuan Lin Yingying Deng Kekai Sheng Mengdan Zhang Fan Tang Weiming Dong Feiyue Huang Changsheng Xu | 2022 | Computational Visual Media2022，8，1： | 6 |
| 3 | High-efficiency and high-power single-frequency fiber laser at 1.6μm based on cascaded energy-transfer pumping显示文摘In this paper,a technique combining the cascaded energy-transfer pumping(CEP)method and master-oscillator power-amplifier(MOPA)configuration is proposed for power scaling of 1.6-μm-band single-frequency fiber lasers(SFFLs),where the Er^(3+)ion has a limited gain.The CEP technique is fulfilled by coupling a primary signal light at 1.6μm and a C-band auxiliary laser.The numerical model of the fiber amplifier with the CEP technique reveals that the energy transfer process involves the pump competition and the in-band particle transition between the signal and auxiliary lights.Moreover,for the signal emission,the population density in the upper level is enhanced,and the effective population inversion is achieved thanks to the CEP.A single-frequency MOPA laser at 1603 nm with an output power of 52.6 W and an improved slope efficiency of 30.4%is experimentally obtained through the CEP technique.Besides,a laser linewidth of 5.2 k Hz and a signal-to-auxiliary laser ratio of 60.7 d B are obtained at the maximum output power.The proposed technique is anticipated to be promising for increasing the slope efficiency and power scaling for fiber lasers operating at L band. | XIANCHAO GUAN QILAI ZHAO WEI LIN TIANYI TAN CHANGSHENG YANG PENGFEI MA ZHONGMIN YANG SHANHUI XU | 2020 | Photonics Research2020，8，3： | 5 |
| 4 | Microstructure and Wear Behaviour of Laser-Induced Thermite Reaction Al_2O_3 Ceramic Coatings on Pure Aluminum and AA7075 Aluminum Alloy显示文摘Wear-resistant laser-induced thermite reaction Al_2O_3 ceramic coatings can be fabricated on pure Al and AA7075 aluminum alloy by laser cladding(one-step method)and laser cladding followed by laser re-melting(two-step method)using mixed powders CuO-Al-SiO_2 in order to improve the wear properties of aluminum and aluminum alloy,respectively.The microstructure of the coatings was characterized by scanning electron microscopy(SEM)and X-ray diffraction(XRD).The wear resistance of the coatings was evaluated under dry sliding wear test condition at room temperature.Owing to the presence of hardα-Al_2O_3 andγ-Al_2O_3 phases,the coatings exhibited excellent wear resistance.In addition,the wear resistance of the coatings fabricated by two-step method is superior to that of the coatings fabricated by one-step method. | 黄开金 LIN Xin XIE Changsheng T M Yue | 2008 | Journal of Wuhan University of Technology(Materials Science)2008，23，1： | 4 |
| 5 | Seismic comprehensive forecast based on modified project pursuit regression显示文摘In the research of projection pursuit for seismic comprehensive forecast,the algorithm of projection pursuit regression(PPR) is one of most applicable methods.But generally,the algorithm structure of the PPR is very complicated.By partial smooth regressions for many times,it has a large amount of calculation and complicated extrapolation,so it is easily trapped in partial solution.On the basis of the algorithm features of the PPR method,some solutions are given as below to aim at some shortcomings in the PPR calculation:to optimize project direction by using particle swarm optimization instead of Gauss-Newton algorithm,to simplify the optimal process with fitting ridge function by using Hermitian polynomial instead of piecewise linear regression.The overall optimal ridge function can be obtained without grouping the parameter optimization.The modeling capability and calculating accuracy of projection pursuit method are tested by means of numerical emulation technique on the basis of particle swarm optimization and Hermitian polynomial,and then applied to the seismic comprehensive forecasting models of polydimensional seismic time series and general disorder seismic samples.The calculation and analysis show that the projection pursuit model in this paper is characterized by simplicity,celerity and effectiveness.And this model is approved to have satisfactory effects in the real seismic comprehensive forecasting,which can be regarded as a comprehensive analysis method in seismic comprehensive forecast. | Anxu Wu Xiangdong Lin Changsheng Jiang Yongxian Zhang Xiaodong Zhang Mingxiao Li Ping'an Li | 2009 | Earthquake Science2009，22，5： | 3 |
| 6 | Design and Develop Online Monitoring and Early-warning System of Crane Structural Stress显示文摘This paper proposed an online monitoring and early-warning system of dynamic stress of crane metal structure, and designed this system’s hardware,including sensor unit,data gathering unit,and controlling & processing unit of this sys- tem,and discussed the waterproof protection for resistance strain wafer and scheme of data gathering and transmission of dynamic strain gauge,moreover developed system software of real-time and online monitoring dynamic stress,including data gathering by DLL and data display & processing based on Visual C++.The system applies the dynamic strain gauge to gather the data of the stress,and communicates between PLC control system of crane and upper industrial computer,so that realize the real-time online monitoring and early-warning for crane’s metal structure stress.The test results show this system carry on real time and online monitoring to dynamic stress of loud-bearing metal structure longly and stability,and can give an alarm and overload protection on time.So the system has good practice value. | XU Huping~1 LIN Weiguo~2 XU Changsheng~2 1.School of Automation,Wuhan University of Technology,Wuhan 430070,China 2.School of Material Engineering,Wuhan University of Tedmology,Wuhan 430070 ,China | 2006 | 武汉理工大学学报2006，28，S2： | 1 |
| 7 | The potential effect of variations in climate and agricultural practice on N_2O emissions (Ⅱ)——Variations in agricultural practice显示文摘WE expanded Decomposition-Denitrification (DNDC)modeling study to systematically assess the potential effect of farming practice on N2O emission by choosing a corn-rape rotation and a soybean-winterwheat rotation field in Guizhou Province, westsouthern China, asN2O emission from subtropical agricultural soil study plots. These sensitivity studies address questions relevant to issue of how change in fanning practice might be used to mitigate emissions. Manure additions had the most pronounced impact on N2O emissions of farming practice simulatedand the influence of manure addition was nonlinear (fig. 1). This result is consistent with previous studies for an Iowa corn field. The addition of manure remarkably elevates the level of organic carbon, enhances soil nitrogen mineralization, and increases the efficiency of N2O production. Simulated results alsoshowed that the influence of manure additions on N2O emission from soybean-winter wheat field had | XU Wenbin~(1,2), HONG Yetang~1, CHEN Xuhui~3, LI Changsheng~4, LIN Qinghua~1 and WANG Yu~1, 1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2. Institute of Environment and Resources Chemistry, Zhejiang University, Hangzhou 310027, China 3. Soil and Fertilizer Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550013, China 4. Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, USA | 1999 | Chinese Science Bulletin1999，44，S2： | 1 |
| 8 | Fabrication of superhydrophobic Cu surfaces with tunable regular micro and random nano-scale structures by hybrid laser texture and chemical etching显示文摘 | Changsheng Dong Yu Gu Minlin Zhong Lin Li Kursad Sezer Mingxing Ma Wenjin Liu | 2011 | Journal of Materials Processing Tech2011，，7： | 1 |
| 9 | Combined GPSGLONASS Precise Point Positioning with Fixed GPS Ambiguities_Sensors 2014 显示文摘 | Lin Pan Changsheng Cai | 2014 | sensors2014，14，17： | 1 |
| 10 | Wheel Setting Error Modeling and Compensation for Arc Envelope Grinding of Large-Aperture Aspherical Optics显示文摘Precision grinding is a key process for realizing the use of large-aperture aspherical optical elements in laser nuclear fusion devices,large-aperture astronomical telescopes,and high-resolution space cameras.In this study,the arc envelope grinding process of large-aperture aspherical optics is investigated using a CM1500 precision grinding machine with a maximum machinable diameter ofΦ1500 mm.The form error of the aspherical workpiece induced by wheel setting errors is analytically modeled for both parallel and cross grinding.Results show that the form error is more sensitive to the wheel setting error along the feed direction than that along the lateral direction.It is a bilinear function of the feed-direction wheel setting error and the distance to the optical axis.Based on the error function above,a method to determine the wheel setting error is proposed.Subsequently,grinding tests are performed with the wheels aligned accurately.Using a newly proposed partial error compensation method with an appropriate compensation factor,a form error of 3.4μm peak-to-valley(PV)for aΦ400 mm elliptical K9 glass surface is achieved. | Changsheng Li Lin Sun Zhaoxiang Chen Jianfang Chen Qijing Lin Jianjun Ding Zhuangde Jiang | 2022 | Chinese Journal of Mechanical Engineering2022，35，5： | 1 |
| 11 | An analysis on combined GPS/COMPASS data quality and its effect on single point positioning accuracy under different observing conditions显示文摘 | Changsheng Cai Yang Gao Lin Pan Wujiao Dai | 2013 | Advances in Space Research2013，，： | 1 |
| 12 | A center point iteration MPPT method with application on the frequency-modulated LLC microinverter显示文摘 | Zhang Qian Hu Changsheng Chen Lin | 2014 | IEEE Transactions on Power Electronics2014，29，3： | 1 |
| 13 | Numerical Simulation of Moffatt Vortices in V-Shaped Notch 显示文摘 | Lin Changsheng Yang Guizhi | 2003 | Computational Methods in Engineering and Science2003，，9： | 1 |
| 14 | Modal identification from nonstationary ambient response data using extended random decrement algorithm显示文摘 | Lin Changsheng Chang Daiyun | 2012 | Computers and Structures2012，119，： | 1 |
| 15 | Maintenance of human embryonic stem cells on gelatin显示文摘Matrigel is routinely used as a coating material in the feeder-free culture system of human embryonic stem cells (hESCs). However, matrigel is costive and inconvenient to use. In this study, the possibility of using gelatin as an alternative coating material was investigated. The results showed that, after trypsinization, hESCs were maintained undifferentiated on gelatin. These hESCs expressed pluripotent markers, formed teratoma and maintained a normal karyotype. As measured at passage 10, the hESCs expressed a high level of Oct4 on both gelatin and Matrigel. hESCs growing on gelatin formed AP-positive colonies in similar size and number to those growing on Matrigel (P > 0.05). Moreover, hESCs growing on gelatin contained a comparable percentage of SSEA-4-positive cells to those growing on Matrigel (95.1% vs.94.3%, P > 0.05). H-1 hESCs were maintained undifferentiated on gelatin for 20 passages and remained the stable normal karyotype. This gelatin-based culture protocol may allow us to propagate hESCs in large scale, with less cost. | LI Yang LIN ChangSheng WANG Li LIU Ying MU XiaoNing MAYue LI LingSong | 2009 | Chinese Science Bulletin2009，54，22： | 1 |
| 16 | Low Temperature Sintered CaTiSiO5 - CaTiO3 Dielectric Ceramics Doped by 2ZnO - B2O3显示文摘 | Chen Qiao Lin Xuping Deng Changsheng | 2008 | Key Engineering Materials2008，，368372： | 1 |
| 17 | “1+1>2”:Highly efficient removal of organic pollutants by composite nanofibrous membrane based on the synergistic effect of adsorption and photocatalysis显示文摘Adsorption and photocatalysis are regarded as two desirable technologies for wastewater remediation,but are still unsatisfactory in removal effect,eco-friendly regeneration and facile reusability.In this study,we developed a composite nanofibrous membrane material with excellent removal performance for organic pollutants based on synergistic adsorption and photocatalysis.A novel boron-doped,nitrogen-deficient graphitic carbon nitride(B-C3N4)photocatalyst as well as an amphiphilic copolymer of methyl methacrylate and acrylic acid(p(MMA-AA))were synthesized respectively,and then used to modify polyethersulfone for the fabrication of composite nanofibrous membrane with improved hydrophilicity,negativelycharge property and enhanced visible light response simultaneously.Subsequently,the synergistic effect of adsorption and photocatalytic degradation for organic pollutants were identified especially and resulted in an excellent removal efficiency even superior to the combination of adsorption and photocatalytic degradation,which could be called a“1+1>2”effect.In addition,the regeneration and reusability,the purification ability for multicomponent wastewater,and the photocatalytic mechanism,were investigated and discussed systematically.In this work,we not only prepared the nanofibrous membrane with synergistic effect of adsorption and photocatalysis,but also provided a versatile approach to design dualfunctional support material to ensure the practical applications of powdery photocatalyst in wastewater treatment. | Yuanting Xu Wanting Lin Dandan Yuan Shifan Chen Fang Li Yanping Long Chao He Weifeng Zhao Changsheng Zhao | 2022 | Journal of Materials Science & Technology2022，，29： | 1 |
| 18 | Lagre cross section Y-branch with new fiber-waveguide endface in silicon-on-insulator显示文摘 | Wang Yongjin Lin Zhilang Zhang Changsheng | 2004 | IEEE Photonics Technology Letters2004，16，： | 1 |
| 19 | An analysis on combined GPS/COMPASS data quality and its effect on single point positioning accuracy under different observing conditions显示文摘 | Changsheng Cai Yang Gao Lin Pan Wujiao Dai | 2013 | Advances in Space Research2013，，： | 1 |
| 20 | Numerical simulation of Moffatt vortices in V-shaped notch显示文摘 | | 2003 | Computational Methods in Engineering and Science2003，9，： | 1 |
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