|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Fast cross validation for regularized extreme learning machine显示文摘A method for fast l-fold cross validation is proposed for the regularized extreme learning machine(RELM). The computational time of fast l-fold cross validation increases as the fold number decreases, which is opposite to that of naive l-fold cross validation. As opposed to naive l-fold cross validation, fast l-fold cross validation takes the advantage in terms of computational time, especially for the large fold number such as l > 20. To corroborate the efficacy and feasibility of fast l-fold cross validation,experiments on five benchmark regression data sets are evaluated. | Yongping Zhao Kangkang Wang | 2014 | Journal of Systems Engineering and Electronics2014，25，5： | 8 |
| 2 | Single small molecule-assembled nanoparticles mediate efficient oral drug delivery显示文摘Oral drug delivery,which requires surviving the harsh environment in the gastrointestinal(Gl)tract and penetrating the intestinal epithelium,has not bee n achieved using simple formulatio n nan oparticles(NPs).Medici nal natural products(MNPs)have bee n widely used in traditi onal medicine for disease management through oral consumption.However,most pharmacologically active compounds within MNPs do not have the properties suitable for oral applicatio ns.We hypothesize that some MNPs contain n atural nano materials that can convert those compounds into oral formulations by forming NPs.After screening 66 MNPs,we identified five classes of small molecules that form NPs,many of which are capable of efficient drug encapsulation and Gl penetration.We show that one of them,dehydrotrametenolic acid(DTA),is capable of mediating oral delivery for effective disease treatment.We determined that DTA NPs assemble through hydrogen bonding and penetra怕the Gl tract via apical sodium-depe ndent bile acid tran sporter.Our study reveals a no vel class of single comp orient,small molecule-assembled NPs for oral drug delivery,and suggests a n ovel approach to modernizi ng MNPs through nano material discovery. | Xin Yang Chao Ma Zeming Chen Jun Liu Fuyao Liu Rongbin Xie Haitian Zhao Gang Deng Ann TChen Ningbo Gong Lei Yao Pengjian Zuo Kangkang Zhi Jiacheng Wang Xiaobin Gao Jing Wang Louzhen Fan Jiangbing Zhou | 2019 | Nano Research2019，12，10： | 4 |
| 3 | First experimental constraints on WIMP couplings in the effective field theory framework from CDEX显示文摘We present weakly interacting massive particles(WIMPs) search results performed using two approaches of effective field theory from the China Dark Matter Experiment(CDEX), based on the data from both CDEX-1B and CDEX-10 stages. In the nonrelativistic effective field theory approach, both time-integrated and annual modulation analyses were used to set new limits for the coupling of WIMP-nucleon effective operators at 90% confidence level(C.L.) and improve over the current bounds in the low mχregion. In the chiral effective field theory approach, data from CDEX-10 were used to set an upper limit on WIMP-pion coupling at 90% C.L. We for the first time extended the limit to the m_(χ)<6 GeV/c^(2) region. | Yi Wang Zhi Zeng Qian Yue LiTao Yang KeJun Kang YuanJing Li Mehment Agartioglu HaiPeng An JianPing Chang JingHan Chen YunHua Chen JianPing Cheng Cheng Yi Chiang WenHan Dai Zhi Deng ChangHao Fang XinPing Geng Hui Gong QiuJu Guo XuYuan Guo HongJian He Li He ShengMing He JinWei Hu TuChen Huang HanXiong Huang HaiTao Jia LiPing Jia Xi Jiang HauBin Li JianMin Li Jin Li MingXuan Li RenMingJie Li Xia Li YuLan Li Bin Liao FongKay Lin ShinTed Lin ShuKui Liu YanDong Liu Yu Liu YuanYuan Liu ZhongZhi Liu Hao Ma YuCai Mao QiYuan Nie JinHua Ning Hui Pan NingChun Qi Jie Ren XiChao Ruan ChangSong Shang Vivek Sharma Ze She Lakhwinder Singh Monoj Kumar Singh TianXi Sun ChangJian Tang WeiYou Tang Yang Tian GuangFu Wang Li Wang Qing Wang Yu Chen Wang YunXiang Wang Zhen Wang Henry Tsz-King Wong ShiYong Wu YuCheng Wu HaoYang Xing Yin Xu Tao Xue YuLu Yan Nan Yi ChunXu Yu HaiJun Yu JianFeng Yue Ming Zeng BingTao Zhang Lei Zhang FengShou Zhang ZhenYu Zhang KangKang Zhao MingGang Zhao JiFang Zhou ZuYing Zhou JingJun Zhu | 2021 | Science China(Physics,Mechanics & Astronomy)2021，64，8： | 3 |
| 4 | Parameter studies and evaluation principles of delamination damage in laminated composites显示文摘Delamination represents one of the most severe failure modes in composite laminates,especially when they are subjected to uniaxial compression loads.The evaluation of the delamination damage has always been an essential issue of composite laminates for durability and damage tolerance in engineering practice.Focusing on the most typical and representative elliptical delamination issue,an analytical model simultaneously considering the conservative buckling process and non-conservative delamination propagation process is implemented.Various computational cases considering different delamination depths,directions,aspect ratios,and areas are established,and the predicted results based on the analytical model are carefully compared.Effects of these geometrical delamination parameters on the buckling,delamination propagation,and failure behaviors of composite laminates are thoroughly analyzed,and innovative evaluation principles of the delamination damage have been concluded.It is found that the delamination area is the key factor that truly affecting the failure behaviors of delaminated composites,and the local/global buckling and failure loads show clear linearity with the delamination area,whilst the delamination depth and direction only have slight effects. | Kangkang WANG Libin ZHAO Haiming HONG Jianyu ZHANG Yu GONG | 2021 | Chinese Journal of Aeronautics2021，34，7： | 3 |
| 5 | Investigation on meshing and dynamic characteristics of spur gears with tip relief under wear fault显示文摘Combining the loaded tooth contact analysis(LTCA)method and the gear dynamic model,a wear prediction model for spur gears with tip relief is established.The simulated wear depth is verified by the experimental results in a published reference.Based on the wear profile,the mesh stiffness and the tooth root stress obtained from the proposed model are compared with those obtained from the finite element model.Relative to the finite element method,the proposed method can greatly reduce the computation time.The effects of the tip relief and surface wear on the meshing and the dynamic characteristics are discussed.The tip relief can greatly decelerate the surface wear.Appropriate tip relief and slight wear can decrease the tooth interference and reduce the system vibration.Furthermore,the effects of the rotational speed on the wear depth are also studied and it is found that the quasi-static model is applicable to wear prediction when the rotational speed is away from the harmonic resonance peak. | HUANGFU YiFan CHEN KangKang MA Hui LI Xu YU Xi ZHAO BaiShun WEN BangChun | 2019 | Science China(Technological Sciences)2019，62，11： | 1 |
| 6 | Simultaneous Optimization of Efficiency,Stretchability,and Stability in All-Polymer Solar Cells via Aggregation Control显示文摘With the emergence of Y-series small molecule acceptors,polymerizing the small molecule acceptors with aromatic linker units has attracted significant research attention,which has greatly advanced the photovoltaic performance of all-polymer solar cells.Despite the rapid increase in efficiency,the unique characteristics(e.g.,mechanical stretchability and flexibility)of all-polymer systems were still not thoroughly explored.In this work,we demonstrate an effective approach to simultaneously improve device performance,stability,and mechanical robustness of all-polymer solar cells by properly suppressing the aggregation and crystallization behaviors of polymerized Y-series acceptors.Strikingly,when introducing 50 wt%PYF-IT(a fluorinated version of PY-IT)into the well-known PM6:PY-IT system,the all-polymer devices delivered an impressive photovoltaic efficiency of 16.6%,significantly higher than that of the control binary cell(15.0%).Compared with the two binary systems,the optimal ternary blend exhibits more efficient charge separation and balanced charge transport accompanying with less recombination.Moreover,a high-performance 1.0 cm^(2)large-area device of 15%efficiency was demonstrated for the optimized ternary all-polymer blend,which offered a desirable PCE of 14.5%on flexible substrates and improved mechanical flexibility after bending 1000 cycles.Notably,these are among the best results for 1.0 cm^(2)all-polymer OPVs thus far.This work also heralds a bright future of all-polymer systems for flexible wearable energy-harvesting applications. | Kaihu Xian Kangkang Zhou Mingfei Li Junwei Liu Yaowen Zhang Tao Zhang Yong Cui Wenchao Zhao Chunming Yang Jianhui Hou Yanhou Geng Long Ye | 2023 | Chinese Journal of Chemistry2023，41，2： | 1 |
| 7 | Microstructure and mechanical properties of an Mg–10Al alloy fabricated by Sb-alloying and ECAP processing显示文摘 | Hongxia Wang Kangkang Zhou Guoyin Xie Xingzhong Liang Wei Liang Yuantao Zhao | 2013 | Materials Science & Engineering A2013，，： | 1 |
| 8 | A generic approach yields organic solar cells with enhanced efficiency and thermal stability显示文摘The use of deuterium are critical for promoting the fundamental understanding of aggregate materials and their new functions.Particularly,the solution structure of conjugated polymers can be hardly resolved without deuteration.However,studies about the isotopic effects of casting solvents on the aggregated structures of photovoltaic polymers and their bulk-heterojunction blends are deficient.Here,the impact of deuterated solvents on the thermal behavior,aggregated structures,and device performance of photovoltaic polymers is clearly delineated for the first time by multiple techniques.The enhanced π-π stacking order of photovoltaic polymers is highly relevant to their relatively poor miscibility with deuterated solvents.Benefiting from higher crystallinity and optimized morphology of deuterated solvents processed films,the devices are able to achieve better efficiency and notable improvement in thermal stability.Our results highlight the isotopic effects of solvents on the aggregated structure of conjugated polymer systems and reveal the potential of innovative approaches to fabricate thermally stable high-efficiency solar cells. | Mengyuan Gao Kai Zhang Chunyong He Hanqiu Jiang Xiong Li Qingchun Qi Kangkang Zhou Yu Chen Wenchao Zhao Long Ye | 2023 | Aggregate2023，4，2： | 0 |
| 9 | Refining acceptor aggregation in nonfullerene organic solar cells to achieve high efficiency and superior thermal stability显示文摘With the rapid increase in photoelectric conversion efficiency of organic photovoltaics(OPVs),prolonging the operational lifetime of devices becomes one of the critical prerequisites for commercial applications.Guided by the theoretical calculations of molecular stacking and miscibility,we proposed an effective approach to simultaneously improve device performance and thermal stability of high-efficiency OPVs by refining the aggregation of Y-series acceptors.The key to this approach is deliberately designing an asymmetric Y-series acceptor,named Y6-CNO,which acts as a third component regulator to finely tune the degree of acceptor aggregation and crystallization in the benchmark PM6:Y6-BO system.Strikingly,a champion photovoltaic efficiency of 18.0%was achieved by introducing 15 wt%Y6-CNO into the PM6:Y6-BO system,significantly higher than the control binary cell(16.7%).Moreover,annealing at 100°C for over 1,200 h does not markedly affect the photovoltaic performance of the optimal ternary devices,maintaining above 95%of the initial performance and exhibiting an exceptionally high T_(80)lifetime of 9,000 h under continuous thermal annealing.By contrast,binary devices suffer from excessive crystallization of acceptors with long-term annealing.Additionally,mixing thermodynamics combined with morphological characterizations were employed to elucidate the microstructure-thermal stability relationships.The ternary OPVs consisting of symmetric and asymmetric homologous acceptors form better charge transport channels and can effectively suppress excessive aggregation of acceptors under long-term annealing.This work demonstrates the effectiveness of refining acceptor aggregation via molecular design for highly efficient and stable nonfullerene-based OPVs. | Kaihu Xian Shengnan Zhang Ye Xu Junwei Liu Kangkang Zhou Zhongxiang Peng Mingfei Li Wenchao Zhao Yu Chen Zhuping Fei Jianhui Hou Yanhou Geng Long Ye | 2023 | Science China Chemistry2023，66，1： | 0 |
| 10 | Separating overlapping bat calls with a bi-directional long short-term memory network显示文摘Acquiring clear acoustic signals is critical for the analysis of animal vocalizations.Bioacoustics studies commonly face the problem of overlapping signals,which can impede the structural identification of vocal units,but there is currently no satisfactory solution.This study presents a bi-directional long short-term memory network to separate overlapping echolocation-communication calls of 6 different bat species and reconstruct waveforms.The separation quality was evaluated using 7 temporal-spectrum parameters.All the echolocation pulses and syllables of communication calls in the overlapping signals were separated and parameter comparisons showed no significant difference and negligible deviation between the extracted and original calls.Clustering analysis was conducted with separated echolocation calls from each bat species to provide an example of practical application of the separated and reconstructed calls.The result of clustering analysis showed high corrected rand index(82.79%),suggesting the reconstructed waveforms could be reliably used for species classification.These results demonstrate a convenient and automated approach for separating overlapping calls.The study extends the application of deep neural networks to separate overlapping animal sounds. | Kangkang ZHANG Tong LIU Shengjing SONG Xin ZHAO Shijun SUN Walter METZNER Jiang FENG Ying LIU | 2022 | Integrative Zoology2022，17，5： | 0 |
| 11 | Spatial planning for urban ventilation corridors by urban climatology显示文摘Ventilation corridors in cities can decrease air pollution and alleviate heat island problems but there remains a need to fully assess their effectiveness.Few urban managers have been able to take city-scale approaches to the construction of urban ventilation corridors.This study aimed to introduced the Ventilation Corridor Planning(VCP)model,which is a multi-criteria evaluation method combined with a geographical information system(GIS)to determine where the ventilated environment is most appropriate.Specifically,the VCP model took Bozhou,China as the research object and contained two scales,including mesoscale and local scale.In mesoscale scale,we got three outputs to build urban ventilation corridors,including 1)background wind environment,2)ventilation potential,3)heat island intensity.In local scale,we used traditional computational fluid dynamics(CFD)model to verify the impact of VCP criteria.The results revealed that compared with the traditional CFD model,the proposed VCP model has advantages in establishing a comprehensive evaluation standard.In addition,the application of VCP model in macro and micro also enhances the efficiency of ventilation corridor construction.Overall,this study introduced a effective modeling method to urban ventilation corridors planning,and provide a way to study the urban climate. | Kangkang Gu Yunhao Fang Zhao Qian Zhen Sun Ai Wang | 2020 | Ecosystem Health and Sustainability2020，6，1： | 0 |
| 12 | All-optical PtSe2 silicon photonic modulator with ultra-high stability显示文摘All-optical modulation based on the photothermal effect of two-dimensional(2 D)materials shows great promise for all-optical signal processing and communication.In this work,an all-optical modulator with a 2 D Pt Se2-onsilicon structure based on a microring resonator is proposed and demonstrated utilizing the photothermal effect of Pt Se2.A tuning efficiency of 0.0040 nm·m W-1 is achieved,and the 10%–90%rise and decay times are 304μs and 284μs,respectively.The fabricated device exhibits a long-term air stability of more than 3 months.The experimental results prove that 2 D Pt Se2 has great potential for optical modulation on a silicon photonic platform. | Kangkang Wei Delong Li Zhitao Lin Zhao Cheng Yuhan Yao Jia Guo Yunzheng Wang Yupeng Zhang Jianji Dong Han Zhang Xinliang Zhang | 2020 | Photonics Research2020，8，7： | 0 |
| 13 | Thermally stable poly(3-hexylthiophene):Nonfullerene solar cells with efficiency breaking 10%显示文摘Solar cells featuring polythiophenes as donors are one of the optoelectronic devices that hold notable promises for commercial application,profiting from the lowest synthetic complexity and excellent scalability.However,the complex phase behaviors of polythiophenes and their blends put constraints on modulating electrical performance and thus realizing stable performance under thermal stress.In this contribution,we present a multi-technique approach that combines calorimetry,scattering,spectroscopy,and microscopy to thoroughly probe the thermodynamic mixing,thermal properties of materials,the evolution of nanoscale domain structure,and device performance of poly(3-hexylthiophene)(P3HT)with a range of nonfullerene acceptors(NFAs)such as ITIC,IDTBR,and ZY-4Cl.Accordingly,two blending guidelines are established for matching these popular NFAs with P3HT to enable highly efficient and thermally stable cells.First,blend systems with weak vitrification and hypo-miscibility are excellent candidates for efficient solar cells.Furthermore,high thermal stability can be achieved by selecting NFAs with diffusion-limited crystallization.The P3HT:ZY-4Cl blend was found to endow the best performance of over 10%efficiency and an exceptionally high T_(80) lifetime of>6000 h under continuous thermal annealing,which are among the highest values for P3HT-based solar cells.This realization of high thermal stability and efficiency demonstrates the remarkable potentials of simple polythiophene:nonfullerene pairs in electronic applications. | Mengyuan Gao Yang Liu Kaihu Xian Zhongxiang Peng Kangkang Zhou Junwei Liu Saimeng Li Fei Xie Wenchao Zhao Jidong Zhang Xuechen Jiao Long Ye | 2022 | Aggregate2022，3，5： | 0 |
| 14 | Quantum well sub-bands probed by photo-excited, capacitance-sensitive resonant tunneling spectrum显示文摘By combining resonant tunneling spectra with capacitance-voltage (C-V) characteristics under photo-excitation, we have developed photo-excited, capacitance-sensitive resonant tunneling spectrum (PC-RTS) for probing the quantized levels of quantum wells in valence band. Inter-well tunneling events have been identified and are in good agreement with the calculated level scheme in the valence band of a quantum well-barrier-quantum well heterostructure. Compared to conventional resonant tunneling spectrum, our method shows remarkable advantages in higher sensitivity for discriminating electronic structures. | WANG LiGuo ZHENG HouZhi MENG KangKang ZHAO JianHua | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，8： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员