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| 1 | Machining deformation of single-sided component based on finishing allowance optimization显示文摘Owing to reliability and high strength-to-weight ratio,large thin-walled components are widely used in the aviation and aerospace industry.Due to the complex features and sequence involved in the machining process of large thin-walled components,machining deformation of component is easy to exceed the specification.In order to address the problem,it is important to retain the appropriate finishing allowance.To find the overall machining deformation,finishing allowance-induced deformation(web finishing allowance,sidewall finishing allowance)and initial residual stress-induced deformation were considered as major factors.Meanwhile,machined surface residual stress-induced deformation,clamping stress-induced deformation,thermal deformation,gravity-induced deformation and inertial force-induced deformation were neglected in the optimization model.Six-peak Gaussian function was introduced to fit the initial residual stress.Based upon the obtained function of initial residual stress,a deformation prediction model between initial residual stress and finishing allowance was established to attain the finishing allowanceinduced deformation.In addition,linear programming optimization model based on the simplex algorithm was developed to optimize the overall machining deformation.Results have concluded that the overall machining deformation reached the minimum value when sidewall finishing allowance and web finishing allowance varied between 1 and 2 mm.Additionally,web finishing allowance-induced deformation and sidewall finishing allowance-induced deformation were1.05 mm and 0.7 mm.Furthermore,the machining deformation decreased to 0.3–0.38 mm with the application of optimized finishing allowance allocation strategy,which made 39–56%reduction of the overall machining deformation compared to that in conventional method. | Xiaoyue LI Liang LI Yinfei YANG Guolong ZHAO Ning HE Xiaocen DING Yaowen SHI Longxin FAN Hui LAN Muhammad JAMIL | 2020 | Chinese Journal of Aeronautics2020，33，9： | 6 |
| 2 | Root imaging from ground penetrating radar data by CPSO-OMP compressed sensing显示文摘As the amount of data produced by ground penetrating radar(GPR) for roots is large, the transmission and the storage of data consumes great resources. To alleviate this problem, we propose here a root imaging algorithm using chaotic particle swarm optimal(CPSO)compressed sensing based on GPR data according to the sparsity of root space. Radar data are decomposed,observed, measured and represented in sparse manner, so roots image can be reconstructed with limited data. Firstly,radar signal measurement and sparse representation are implemented, and the solution space is established by wavelet basis and Gauss random matrix; secondly, the matching function is considered as the fitness function, and the best fitness value is found by a PSO algorithm; then, a chaotic search was used to obtain the global optimal operator; finally, the root image is reconstructed by the optimal operators. A-scan data, B-scan data, and complex data from American GSSI GPR is used, respectively, in the experimental test. For B-scan data, the computation time was reduced 60 % and PSNR was improved 5.539 dB; foractual root data imaging, the reconstruction PSNR was26.300 dB, and total computation time was only 67.210 s.The CPSO-OMP algorithm overcomes the problem of local optimum trapping and comprehensively enhances the precision during reconstruction. | Chao Li Yaowen Su Yizhuo Zhang Huimin Yang | 2017 | Journal of Forestry Research2017，28，1： | 4 |
| 3 | Dopant-free hole transporting materials with supramolecular interactions and reverse diffusion for efficient and modular p-i-n perovskite solar cells显示文摘The rational design of dopant-free organic hole-transporting layer(HTL) materials is still a challenge for realizing high-efficient and stable p-i-n planar perovskite solar cells(pero-SCs). Here, we synthesized two π-conjugated small-molecule HTL materials through tailoring the backbone and conjugated side chain to carefully control molecular conformation. The resultant BDT-TPAs Th containing a planar fused benzo[1,2-b:4,5-b′]dithiophene(BDT) core and a conjugated thiophene side chain showed the planar conformation. X-ray crystallography showed a favorable stacking model in solid states under the parallel-displaced π-πand additional S-π weak-bond supramolecular interactions, thus achieving an obviously increased hole mobility without dopants.As an HTL material in p-i-n planar pero-SCs, the marginal solubility of BDT-TPA-s Th enabled inverse diffusion into the perovskite precursor solution for assisting the subsequent perovskite film growth and passivating the uncoordinated Pb2+ ion defects. As a result, the planar p-i-n pero-SCs exhibited a champion power conversion efficiency(PCE) of 20.5% and enhanced moisture stability. Importantly, the BDT-TPA-s Th HTL material also showed weak thickness-photovoltaic dependence, and the pero-SCs with blade-coated BDT-TPA-s Th as a HTL achieved a 15.30% PCE for the 1-cm2 modularized device. This HTL material design strategy is expected to pave the way toward high-performance, dopant-free and printing large-area planar p-i-n pero-SCs. | Rongming Xue Moyao Zhang Deying Luo Weijie Chen Rui Zhu Yang(Michael)Yang Yaowen Li Yongfang Li | 2020 | Science China Chemistry2020，63，7： | 4 |
| 4 | Maneuvering Multi-target Tracking Using the Multi-model Cardinalized Probability Hypothesis Density Filter显示文摘 | FU Yaowen LONG Jianqian YANG Wei | 2013 | Chinese Journal of Electronics2013，22，3： | 3 |
| 5 | CGR-QV: A Virtual Topology DTN Routing Algorithm Based on Queue Scheduling显示文摘In this paper,we proposed a CGR-QV algorithm in order to solve the problems of low message delivery rate and low throughput problems in deep space communication networks,which are caused by the high delay,asymmetric data transmission rate,and frequent topology switching characteristics.The proposed method separate different message types in the queues,establish the relationship between TTL,wait time and Hurst to prevent the phenomenon of'starvation'and redundancy.In view of the impact of congestion on the network,improved algorithm use the Elastic load balancing strategy establish the relationship between optimal thresholdsαand network performance reliability.Simulation result show that the algorithm has improved in throughput as about 19%,message delivery rate improved as about 7.5%and bandwidth rejection rate decreased as about 4.7%,the algorithm can balance the impact of topology updates and resource consumption better in space communication networks. | Yaowen Qi Li Yang Chengsheng Pan Hanrui Li | 2020 | China Communications2020，17，7： | 3 |
| 6 | Observer-based motion axis control for hydraulic actuation systems显示文摘Unknown dynamics including mismatched mechanical dynamics(i.e.,parametric uncertainties,unmodeled friction and external disturbances)and matched actuator dynamics(i.e.,pressure and flow characteristic uncertainties)broadly exist in hydraulic actuation systems(HASs),which can hinder the achievement of high-precision motion axis control.To surmount the practical issue,an observer-based control framework with a simple structure and low computation is developed for HASs.First,a simple observer is utilized to estimate mismatched and matched unknown dynamics for feedforward compensation.Then combining the backstepping design and adaptive control,an appropriate observer-based composite controller is provided,in which nonlinear feedback terms with updated gains are adopted to further improve the tracking accuracy.Moreover,a smooth nonlinear filter is introduced to shun the“explosion of complexity”and attenuate the impact of sensor noise on control performance.As a result,this synthesized controller is more suitable for practical use.Stability analysis uncovers that the developed controller assures the asymptotic convergence of the tracking error.The merits of the proposed approach are validated via comparative experiment results applied in an HAS with an inertial load as well. | Xiaowei YANG Yaowen GE Wenxiang DENG Jianyong YAO | 2023 | Chinese Journal of Aeronautics2023，36，9： | 2 |
| 7 | Combination Rule Based on Proportional Redistribution of Generalized Conflict for Evidence Theory显示文摘Dempster's rule is a powerful tool for combining multiple distinct pieces of evidence in evidence theory. When conflict between pieces of evidence is high,the combination result of Dempster's rule is counterintuitive. Many alternative combination rules have been proposed. Most of these alternative combination rules are based on the redistribution of Shafer's conflicting mass. The quantitative definition of generalized conflict is given. Based on Proportional generalized conflict redistribution(PGCR), a new class of evidence combination rules is proposed and the links with some existed rules are established. A special instance of the PGCR rules referred to as PGCR-A is proposed by using the subsets' average support degrees as the proportional coefficients. PGCR-A rule can deal with the combination of high conflict evidence. During the process of combination, PGCR-A rule can also automatically determine the weights of the basic belief mass converging to the more specific subsets according to the focal elements' cardinalities. Since PGCR-A rule is not associative, a modified version is proposed to make it quasi-associative. | FU Yaowen YANG Wei | 2014 | Chinese Journal of Electronics2014，23，3： | 2 |
| 8 | Genetic Programming-Based Approach for Structural Optimization显示文摘 | Chee Kiong Soh Yaowen Yang | | 0，，01： | 1 |
| 9 | Vibration energy harvesting using macro-fiber composites显示文摘 | Yaowen Yang Lihua Tang Hongyun Li | 2009 | Smart Materials and Structures2009，，11： | 1 |
| 10 | Preparation and Evaluation of MPEG-PCL Polymeric Nanoparticles Against Gastric Cancer显示文摘This paper provides a new treatment for gastric cancer with a new OMT delivery system.We synthesized MPEG-PCL,an amphiphilic polymer,to construct a nanoparticle encapsulated OMT by pH gradient method,and then examined the nanodrug’s therapeutic efficacy.An integral analytical method was used to characterize the structure of MPEG-PCL.The single factor method and orthogonal test were utilized to investigate the optimum preparation process.The morphology and average size of the OMT-NPs were analyzed by transmission electron microscopy and Zetasizer.CCK-8 assay and confocal fluorescent microscope were used to study the inhibitory effect on SGC-7901 gastric cancer cells.The average size of nanoparticles was 95.86±1.54 nm.The maximum encapsulation efficiency of OMT was 46.84±4.37%,while the drug loading content was 8.89±1.09%.The cumulative release of nanoparticles was 73.07±1.5%,inspected through dynamic dialysis in vitro.Compared with free OMT,OMT-NPs showed enhanced cytotoxic effects in SGC-7901 cells.The nanoparticles could efficiently deliver the OMT into the cancer cells and release it.The OMT delivery system prepared in this paper provides a potential platform for the treatment of gastric cancer.. | 刘霞 LI Juncan HUANG Long YANG Jin WANG Yaowen YANG Mengjia 汤明秀 邱彤 | 2020 | Journal of Wuhan University of Technology(Materials Science)2020，35，6： | 1 |
| 11 | A novel two degrees of freedom piezoelectric energy har- vester 显示文摘 | Wu Hao Tang Lihua Yang Yaowen | 2013 | Journal of Intelligent material systems and structures2013，24，03： | 1 |
| 12 | “Clicking” graphite oxide sheets with well-defined polystyrenes: A new Strategy to control the layer thickness显示文摘 | Xiaoming Yang Lijun Ma Sheng Wang Yaowen Li Yingfeng Tu Xiulin Zhu | 2011 | Polymer2011，，14： | 1 |
| 13 | Effect of roughness on wettability and floatability:Based on wetting film drainage between bubbles and solid surfaces显示文摘Wetting film thinning measurement was introduced to clarify the wettability and floatability of solid surfaces with varying roughness. The wettability was quantified using the contact angle measurement combined with the dynamic force microbalance test between solid surfaces and water droplets, while the floatability was investigated by the bubble-solid surface dynamic attachment observation and the induction time measurement. The results show that the water contact angles reduce(14.53°, 12.74°, and 6.71°)with the increase of glass surface roughness, while the water droplet-glass adhesion forces intensify(11.1, 19.1 and 19.2 μN) owing to the stable wetting film. The distortion of the contact surface and the Wenzel state are the causes. In contrast, the hydrophobized surfaces have the growing apparent contact angles(38.08°, 69.81°, and 81.01°), declining adhesion strength and shortening induction time(863, 352and 12 ms) along with the increasing surface roughness. The weak wettability and fine floatability on the rough hydrophobized surface is reflected in the fast wetting film drainage dynamics and three-phase contact formation, which may be attributed to the wetting film with short diameter on tiny rough nubs and the entrapped air in the grooves as a bridge between the bulk bubble and the solid surface. | Ming Li Yaowen Xing Chunyun Zhu Qinshan Liu Zili Yang Rui Zhang Youfei Zhang Yangchao Xia Xiahui Gui | 2022 | International Journal of Mining Science and Technology2022，32，6： | 1 |
| 14 | Improving functionality of vibration energy harvesters using mag- nets显示文摘 | TANG Lihua YANG Yaowen SOH C K | 2012 | Journal of Intelligent Material Systems and Structures2012，23，13： | 1 |
| 15 | Automated Optimum Design of Structures Using Genetic Programming显示文摘 | Yaowen Yang Chee Kiong Soh | 2002 | Computers & Structures2002，90，19： | 1 |
| 16 | Vibration energy harves- ting using macro-fiber composites 显示文摘 | Yang Yaowen Tang Lihua Li Hongyun | 2009 | Smart Material Structure2009，18，： | 1 |
| 17 | A Nonlinear Piezoelectric Cnergy with Magnetic Oscillator显示文摘 | Tang Lihua Yang Yaowen | 2012 | Applied Physics Letters2012，101，09： | 1 |
| 18 | Disease burden of intensive care unit-acquired pneumonia in China: a systematic review and meta-analysis显示文摘 | Yaowen Zhang Zhiyuan Yao Siyan Zhan Zhirong Yang Dong Wei Jing Zhang Jingyi Li Moe H. Kyaw | 2014 | International Journal of Infectious Diseases2014，，： | 1 |
| 19 | Automated optimum design of structures using genetic programming 显示文摘 | Yang Yaowen Chee Kiong Soh | 2002 | Computers and Structures2002，80，： | 1 |
| 20 | A nonlinear piezoelectric energy harvester with magnetic oscillator 显示文摘 | Tang Lihua Yang Yaowen | 2012 | Applied Physics Letters2012，101，09： | 1 |
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