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| 1 | Evaluation of measurement uncertainty based on grey system theory for small samples from an unknown distribution显示文摘To evaluate measurement uncertainty for small sample size and measurement data from an unknown distribution, we propose a grey evaluation method of measurement uncertainty based on the grey relation coefficient. The uncertainty of measurement is analyzed using grey system theory, and the defects of the grey evaluation model of measurement uncertainty (GEMU) are studied. We then establish an improved grey evaluation model of measurement uncertainty (IGEMU). Simulations show that the precision of IGEMU is greater than that of GEMU, and that sample size has only a small effect on the precision of IGEVU. In particular, IGEMU is applied to evaluating measurement uncertainty for small sample size and measurement data from an unknown distribution. The measurement uncertainty of total profile deviation, which is measured by the CNC gear measuring center, can be evaluated by a combination of IGEMU and the Monte Carlo method. | HAN LianFu TANG WenYan LIU YongMeng WANG Jun FU ChangFeng | 2013 | Science China(Technological Sciences)2013，56，6： | 18 |
| 2 | Multi-quasiparticle rotational bands in neutron-rich erbium isotopes显示文摘Multi-quasiparticle states and rotational bands in neutron-rich erbium isotopes have been investigated by the configuration-constrained pairing-deformation-frequency self-consistent total-Routhian-surface (TRS) method with particle-number-conserved pairing. Specifically, the recently observed Kn=4-bands in 168,170,172 Er have been found to experience a configuration change in our calculation. Some other multi-quasiparticle states with uncertain configuration assignments have been reinvestigated by calculating their collective rotations. The configuration-constrained TRS calculation can reproduce experimental data consistently. | FU XiMing JIAO ChangFeng XU FuRong ZHANG ZhenHua | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，8： | 8 |
| 3 | Collective rotations of fission isomers in actinide nuclei显示文摘Using the total-Routhian-surface(TRS)method,the rotational behaviors of fission isomers in the second well of actinide nuclei234 242U,236 244Pu and238 246Cm were investigated.The pairing-deformation-frequency self-consistent TRS calculations reproduced reasonably the experimental moments of inertia extracted from spectroscopic data.It is calculated that,in these largelyelongated(β2≈0.65 andβ4≈0.03)fission isomers,theν12[981]neutron andπ12+[651]proton align simultaneously at rotational frequencyω≈0.4 0.6 MeV(corresponding to spin I≈80),which leads to clear upbending in moments of inertia(MoI’s).Our calculations have indicated that the hexadecapole deformationβ4influenced significantly the frequency of the rotational alignment of the proton12+[651]orbit. | XIE KePing KE WeiYao LIANG WuYang FU XiMing JIAO ChangFeng PEI JunChen XU FuRong | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，2： | 2 |
| 4 | Quantitative mechanisms behind the high strength and electrical conductivity of Cu-Te alloy manufactured by continuous extrusion显示文摘The microstructure,mechanical performance,and electrical conductivity of Cu-Te alloy fabricated by continuous extrusion were quantitatively investigated.The results demonstrate that the grain size of the Cu-Te alloy is refined significantly by incomplete dynamic recrystallization.The Cu2Te phase stimulates recrystallization and inhibits subgrain growth.After extrusion,the tensile strength increases from217.8±4.8 MPa to 242.5±3.7 MPa,the yield strength increases from 65.1±3.5 MPa to 104.3±3.8 MPa,and the yield to tensile strength ratio is improved from 0.293±0.015 to 0.43±.0.091,while the electrical conductivity of room temperature decreases from 95.8±0.38%International Annealed Cu Standard(IACS)to 94.0%±0.32%IACS.The quantitative analysis shows that the increment caused by dislocation strengthening and boundary strengthening account for 84.6%of the yield strength of the extruded Cu-Te alloy and the electrical resistivity induced by grain boundaries and dislocations accounts for 1.6%of the electrical resistivity of the extruded Cu-Te alloy.Dislocations and boundaries contribute greatly to the increase of yield strength,but less to the increase of electrical resistivity. | Qianqian Fu Bing Li Minqiang Gao Ying Fu Rongzhou Yu Changfeng Wang Renguo Guan | 2022 | Journal of Materials Science & Technology2022，，26： | 1 |
| 5 | IFC model viewer to support nD model application显示文摘 | Changfeng Fu Ghassan Aouad Angela Lee Amanda Mashall-Ponting Song Wu | 2006 | Automation in construction2006，15，： | 1 |
| 6 | Increased rigidly triaxial deformations in neutron-rich Mo, Ru isotopes显示文摘Pairing-deformation-frequency self-consistent crankingWoods-Saxon model is employed to investigate the triaxiality in the ground states of the neutron-rich even-even Mo, Ru isotopes. Deformation evolutions and transition probabilities have been studied, giving the triaxial shapes in their ground states. The kinematic moments of inertia have been calculated to illustrate the gradually rigid deformation. To understand the origin of the asymmetry shape in this region, we analyze the evolution of single-particle orbits with changing γ deformation. The present calculations reveal the importance of the triaxial deformation in describing not only static property, but also rotational behaviors in this mass region, providing significant probes into the shell structure around. | WuYang Liang ChangFeng Jiao FuRong Xu XiMing Fu | 2016 | Science China(Physics,Mechanics & Astronomy)2016，59，9： | 0 |
| 7 | A comparative study of preventing postoperative tendon adhesion using electrospun polyester membranes with different degradation kinetics显示文摘Complications arising from tendon injury include tendon sheath infection and peritendinous adhesion, in which tendon adhesion often leads to serious motor dysfunction. In this work, the electrospun membranes of poly(L-lactide)(PLA) and poly(ε-caprolactone)(PCL) with different degradation kinetics were used to investigate their efficacy for anti-adhesion toward Achilles tendon repair. Compared with the PCL membrane, the PLA sample showed a faster rate of degradation in 42 d, and all the degradation media(i.e., phosphate-buffered saline) maintained at a constant p H of around 7.4. Meanwhile, the superior biocompatibility of both the PLA and PCL membranes were proved by the in vitro cellular adhesion tests and in vivo histopathological assays. Simultaneously, the PLA membrane was more effective than the PCL sample in decreasing adhesion and promoting functional recovery. Furthermore, the experiment result was further confirmed by hematoxylin-eosin and Masson's trichrome staining, and type I collagen immunohistochemical analysis. All results revealed that the model treated with the electrospun PLA membrane was obviously better with regard to both anti-adhesion and tendon repair than that in the PCL membrane group. Considering the results of degradation and adhesion prevention efficacy, the electrospun polyester membranes, especially the PLA one, would be applied with fascinating potential in clinical prevention of postoperative tendon adhesion. | Zhiming Song Bo Shi Jianxun Ding Xiuli Zhuang Xiaonan Zhang Changfeng Fu Xuesi Chen | 2015 | Science China Chemistry2015，58，7： | 0 |
| 8 | Osteoimmunity-regulating biomaterials promote bone regeneration显示文摘Osteoimmunomodulation is a fascinating approach for balancing osteoimmune through regulating reciprocal interactions between bone cells and immune cells[1].Implantation of the osteoimmunity-regulating biomaterials regulates osteoimmune conditions in the host dynamically,thus intensifying osseointegration under physiological microenvironments[1].This perspective presents a brief overview of osteoimmunity-regulating biomaterials for augmenting bone regeneration based on a recently published study by our research team[2]. | Zongtai Liu Jin Zhang Changfeng Fu Jianxun Ding | 2023 | Asian Journal of Pharmaceutical Sciences2023，18，1： | 0 |
| 9 | Enhancing Dense Small Object Detection in UAV Images Based on Hybrid Transformer显示文摘Transformer-based models have facilitated significant advances in object detection.However,their extensive computational consumption and suboptimal detection of dense small objects curtail their applicability in unmanned aerial vehicle(UAV)imagery.Addressing these limitations,we propose a hybrid transformer-based detector,H-DETR,and enhance it for dense small objects,leading to an accurate and efficient model.Firstly,we introduce a hybrid transformer encoder,which integrates a convolutional neural network-based cross-scale fusion module with the original encoder to handle multi-scale feature sequences more efficiently.Furthermore,we propose two novel strategies to enhance detection performance without incurring additional inference computation.Query filter is designed to cope with the dense clustering inherent in drone-captured images by counteracting similar queries with a training-aware non-maximum suppression.Adversarial denoising learning is a novel enhancement method inspired by adversarial learning,which improves the detection of numerous small targets by counteracting the effects of artificial spatial and semantic noise.Extensive experiments on the VisDrone and UAVDT datasets substantiate the effectiveness of our approach,achieving a significant improvement in accuracy with a reduction in computational complexity.Our method achieves 31.9%and 21.1%AP on the VisDrone and UAVDT datasets,respectively,and has a faster inference speed,making it a competitive model in UAV image object detection. | Changfeng Feng Chunping Wang Dongdong Zhang Renke Kou Qiang Fu | 2024 | Computers, Materials & Continua2024，78，3： | 0 |
| 10 | BIM and Design Briefing Integration:Feasibility Study and Conceptual System Framework Development显示文摘Design briefing plays a crucial role in the success of a building project.Some new methods of design briefing have been developed recently,but rarely integrated with Building Information Modelling(BIM).This paper presents a feasibility study of implementing BIM in the design briefing and develop a conceptual system framework to present possible functionalities and processes of BIM-based design briefing.This study started with a series of the interviews with professionals in the industry as well as academics in various universities in the UK.A thematic analysis has been carried out to analyse the interview transcripts.The development of conceptual system framework following the software engineering method presents the major functional modules and relevant datasets of a BIM-based design briefing system which identified in the interviews.The paper also discusses on both the benefit and the potential difficulties of BIM-based design briefing,although 93%of the interviewees agree that BIM technology should be adopted in design briefing to improve the quality&process of design and to involve other stakeholders and POE data in design briefing. | Supreet Lama Changfeng Fu | 2020 | Journal of Construction Research2020，2，2： | 0 |
| 11 | Indoor Air Quality(IAQ)Evaluation of Higher Education Learning Environments显示文摘2022 Indoor Air Quality(IAQ),particularly in educational facilities,is gaining considerable interest and is a synonymous indicator towards evaluating human comfort.Factors such as CO_(2) concentration,temperature,and humidity play crucial parts in determining an acceptable level of IAQ.Many studies have also demonstrated that the indoor air quality of classrooms affects students’concentration and performance.Today with the threat of a global pandemic,the demand of clean&fresh indoor air quality in education buildings is extremely intensive.This study focuses on investigating IAQ situations and changes in different typical functional spaces of a higher education building in the UK.CO_(2),temperature,and humidity data in various learning environment were monitored via data loggers during the winter.Associated with data monitoring,a set of questionnaires surveys were carried out to evaluate the user’s experience.The results of this study show that temperature and CO_(2) concentration in the classrooms was constantly higher than the government guidance on a daily basis.The analysis also shows that temperature and humidity increased with CO_(2) levels,but at a much lower rate.This study has revealed poor and concerning IAQ in higher education buildings in the UK,particularly in larger rooms with high occupancy.Along with the findings,this paper also identifies possible impact or factors and proposes solutions to overcome these issues. | Supreet Lama Changfeng Fu Angela Lee | 2022 | Journal of Smart Buildings and Construction Technology2022，4，1： | 0 |
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