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Molecular Design of TPD-based Organic A-π-D-π-A Dyes for Dye-sensitized Solar Cells

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Chemical Research in Chinese Universities 2013年第2期29卷 355-360页

作者： cao xing-bo College of Petroleum and Chemical Engineering Dongying Vocational College Dongying 257091 P. R. China

An interesitng class of organicA-π-D-π-A dyes based on an N,N,N＇,N＇-tetraphenylbenzidine（TPD） unit as donor was designed and synthesized for dye-sensitized solar cells（DSSCs）. TPD-4-based DSSCs gave a short circuit photocurrent density（Jsc） of 16.67 mA/cm2, a open circuit voltage（Voc） of 0.635 V and a fill factor（f/） of 0.68, achieving a solar-to-electricity conversion efficiency（r/） of 7.22% in preliminary tests. The N3-sensitized device gave an η value of 8.02% with a Jsc of 18.81 mA/cm2, a Voc of 0.630 V and anffof 0.68 under the same conditions. The incident photo-to-current efficiency（IPCE） values above 70% observed in a range of 460 to 600 nm with a maximum value of 80% at 500 nm indicate that the TPD-4-based DSSC shows a high performance. Under the same conditions, the DSSC based on N3 provided the IPCE values above 70% in a range of 490 to 580 nm with a maximum value of 76% at 500 nm. Both further optimization of the device processing and structural modification of these dyes are an- ticipated to make the device give even better performances.

关键词： N,N,N',N'Tetraphenylbenzidine(TPD) unit Dye-sensitized solar cell Solar-to-electricity conversionefficiency

Two novel phase transition materials based on 1-isopropyl-1,4-diazabicyclo[2.2.2]octan-1-ium

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Chinese Chemical Letters 2017年第2期28卷 400-406页

作者： Li-Zhuang Chen xing-xing cao School of Biology and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 China

Two novel phase transition materials,[C9H20N2][Na（BF4）3]（1） and[C9H20N2][（PF6）2]（2）,were synthesized based on 1-isopropyl-1,4-diazabicyclo[2.2.2]octan-1-ium with sodium tetrafluoroborate and hexafluorophosphoric acid,*** scanning calorimetry measurements detected that 1 and 2 underwent reversible phase transitions,which were confirmed by dielectric *** crystal X-ray diffraction data suggested that compound 1 changed from a high temperature phase with a space group of P6_3 to a low temperature one with a space group of P21/c,and that compound 2transformed from the space group of Pbca at room temperature to P21/c at low *** of hydrogen bonds and distortion of l,4-diazabicyclo[2.2.2]octane rings may drive the transitions.

关键词： X-ray diffraction Phase transition Dielectric Differential scanning calorimetry

The Analytic Eigenvalue Structure of the 1+1 Dirac Oscillator

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Chinese Physics Letters 2020年第9期37卷 10-14页

作者： Bo-xing cao Fu-Lin Zhang Department of Physics School of ScienceTianjin UniversityTianjin 300072China

We study the analytic structure for the eigenvalues of the one-dimensional Dirac oscillator,by analytically continning its frequency on the complex plane.A twofold Riemann surface is found,connecting the two states of a pair of particle and *** can,at least in principle,accomplish the transition from a positive energy state to its antiparticle state by moving the frequency continuously on the complex plane,without changing the Hamiltonian after *** result provides a visual explanation for the absence of a negative energy state with the quantum number n=0.

关键词： transition. Dirac connecting

A hybrid WUDT-NAFnet for simultaneous source data deblending

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Petroleum Science 2024年第3期21卷 1649-1659页

作者： Chao-Fan Ke Shao-Huan Zu Jun-xing cao Xu-Dong Jiang Chao Li xing-Ye Liu Key Laboratory of Earth Exploration and Information Technology of Ministry of Education Chengdu University of Technology State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology College of Geophysics Chengdu University of Technology

Simultaneous source technology,which reduces seismic survey time and improves the quality of seismic data by firing more than one source with a narrow time interval,is compromised by the massive blended ***,deblending algorithms have been developed to separate this ***,deep learning(DL)has been proved its great potential in suppressing the *** most popular DL method employs neural network as a filter to attenuate the blended noise in an iterative estimation and subtraction framework(IESF).However,there are still amplitude distortion and blended noise residual problems,especially when dealing with weak signal submerged in strong *** address these problems,we propose a hybrid WUDT-NAFnet,which contains two *** first network is a wavelet based U-shape deblending transformer network(WUDTnet),incorporated into IESF as a robust regularization term to iteratively separate the blended *** second network is a nonlinear activate free network(NAFnet)designed to recover the event amplitude and further suppress the weak noise residual in *** the hybrid network,the blended noise can be separated purposefully and *** using synthetic and field seismic data demonstrate that the WUDTNAFnet outperforms traditional curvelet transform(CT)based method and the deblending transformer(DT)model in terms of ***,for field applications,the data augmentation method of bicubic interpolation is applied to mitigate the feature difference between synthetic and field ***,the trained network exhibits strong signal preservation ability in numerical field example without requiring additional training.

关键词： Simultaneous-source Deblending Deep learning Transformer

Scalings for the Alfvén-cyclotron instability in a bi-kappa plasma

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Earth and Planetary Physics 2023年第6期7卷 631-639页

作者： YueQun Lou xing cao MingYu Wu BinBin Ni TieLong Zhang Shenzhen Key Laboratory of Numerical Prediction for Space Storm Institute of Space Science and Applied TechnologyHarbin Institute of TechnologyShenzhen 518055China Key Laboratory of Solar Activity and Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China Chinese Academy of Sciences Center for Excellence in Comparative Planetology Hefei 230026China Space Research Institute Austrian Academy of SciencesGraz 8042Austria

The particle velocity distribution in space plasma usually exhibits a non-Maxwellian high-energy tail that can be well modeled by kappa *** this study,we focus on the growth rates of the Alfvén-cyclotron instability driven by ion temperature anisotropy in a kappa *** solving the kinetic linear dispersion equation,we explore the sensitivity of growth rates to the spectral indexκof a bi-kappa distribution under different plasma conditions,including a variety of plasma beta β_(hp) and temperature anisotropy A_(hp) values of hot ***,a concise,analytic scaling formula is derived that relates the dimensionless maximum growth rate to three independent variables:the spectral index and the plasma beta and temperature anisotropy of hot *** results show that as theκ-value increases,the instability bandwidth narrows and the maximum growth rate increases *** higherβ_(hp)and A_(hp)′the maximum instability undergoes a sharp increase as *** our fits of dimensionless maximum growth rates are compared with solutions to kinetic linear dispersion theory,the results generally exhibit good agreement between *** under the circumstances of largeκ-values and highβ_(hp)and A_(hp)′the scalings of maximum growth rates primarily accurately model the numerical *** analytic expressions can readily be used in large-scale models of the Earth’s magnetosphere to understand wave generation due to the Alfvén-cyclotron instability.

关键词： Alfvén-cyclotron instability kappa distribution kinetic linear dispersion theory scaling formula

Effect of nitrogen introduction methods on the microstructure and properties of gradient cemented carbides

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International Journal of Minerals,Metallurgy and Materials 2011年第6期18卷 709-716页

作者： Tian-en Yang Ji Xiong Lan Sun Zhi-xing Guo Ding cao School of Manufacturing Science and Engineering Sichuan University Chengdu 610065 China

Gradient cemented carbides with the surface depleted in cubic phases were prepared following normal powder metallurgical *** zone formation and the influence of nitrogen introduction methods on the microstructure and performance of the alloys were *** results show that the simple one-step vacuum sintering technique is doable for producing gradient cemented *** structure formation is attributed to the gradient in nitrogen activity during sintering,but is independent from nitrogen introduced methods.A uniform carbon distribution is found throughout the ***,the transverse rupture strength of the cemented carbides can be increased by a gradient *** nitrogen carriers give the alloys distinguishing microstructure and mechanical properties,and a gradient alloy with ultrafine-TiC0.5N0.5 is found optimal.

关键词： gradient cemented carbide gradient methods nitrogen microstructure mechanical properties sintering

Effects of polarization-reversed electromagnetic ion cyclotron waves on the ring current dynamics

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Earth and Planetary Physics 2022年第4期6卷 329-338页

作者： MingHui Zhu YiQun Yu xing cao BinBin Ni xingBin Tian JinBin cao Vania K.Jordanova School of Space and Environment Beihang UniversityBeijing 100191China Key Laboratory of Space Environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100191China Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China Chinese Academy of Sciences Center for Excellence in Comparative Planetology Hefei 230026China Space Science and Application Los Alamos National LaboratoryLos Alamos87545New MexicoUSA

Electromagnetic ion cyclotron(EMIC)waves are widely believed to play an important role in influencing the radiation belt and ring current *** studies have investigated the effects or characteristics of EMIC waves by assuming their left-handed ***,recent studies have found that the reversal of polarization,which occurs at higher latitudes along the wave propagation path,can change the wave-induced pitch angle diffusion *** such a polarization reversal can influence the global ring current dynamics remains *** this study,we investigate the ring current dynamics and proton precipitation loss in association with polarization-reversed EMIC waves by using the ring current-atmosphere interactions model(RAM).The results indicate that the polarization reversal of H-band EMIC waves can truly decrease the scattering rates of protons of 10 to 50 keV or>100 keV in comparison with the scenario in which the EMIC waves are considered purely left-handed ***,the global ring current intensity and proton precipitation may be slightly affected by the polarization reversal,especially during prestorm time and the recovery phase,but the effects are not large during the main *** is probably because the H-band EMIC waves contribute to the proton scattering loss primarily at E<10 keV,an energy range that is not strongly affected by the polarization reversal.

关键词： electromagnetic ion cyclotron waves polarization reversal ring current

Quantitative characterizations of anisotropic dynamic properties in organic-rich shale with different kerogen content

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Petroleum Science 2024年第2期21卷 855-865页

作者： Jian-Yong Xie Yan-Ping Fang xing-Hua Wu Jian'er Zhao Jun-Cheng Dai Jun-xing cao Ji-Xin Deng State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu610059SichuanChina Key Lab of Earth Exploration&Information Techniques of Ministry of Education Geophysical InstituteChengdu University of TechnologyChengdu610059SichuanChina PetroChina Southwest Oil&Gasfield Company Chengdu610017SichuanChina

Understanding the quantitative responses of anisotropic dynamic properties in organic-rich shale with different kerogen content(KC)is of great significance in hydrocarbon exploration and *** controlled experiments with a single variable is challenging for natural shales due to their high variations in components,diagenesis conditions,or pore *** employed the hot-pressing technique to construct 11 well-controlled artificial shale with varying *** artificial shale samples were successive machined into prismatic shape for ultrasonic measurements along different *** revealed bedding perpendicular P-wave velocities are more sensitive to the increasing KC than bedding paralleling velocities due to the preferential alignments of *** elastic stiffnesses except C_(13)are generally decreasing with the increasing KC,the variation of C_(1) and C_(33)on kerogen content are more sensitive than those of C_(44)and C_(66).Apparent dynamic mechanical parameters(v and E)were found to have linear correlation with the true ones from complete anisotropic equations independent of KC,which hold value towards the interpretation of well logs consistently across formations,Anisotropic mechanical parameters(ΔE and brittlenessΔB)tend to decrease with the reducing KC,withΔB showing great sensitivity to KC *** the range of low KC(10%)shale,compilation of data from natural organic rich-shales globally verified the similar systematic relationships that can be empirically used to predict the fraction of KC in shales.

关键词： Elastic properties Organic shale Anisotropy Kerogen content Physical modeling

A data assimilation-based forecast model of outer radiation belt electron fluxes

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Earth and Planetary Physics 2023年第6期7卷 620-630页

作者： Yuan Lei xing cao BinBin Ni Song Fu TaoRong Luo XiaoYu Wang Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China Chinese Academy of Sciences Center for Excellence in Comparative Planetology Hefei 230026China

Because radiation belt electrons can pose a potential threat to the safety of satellites orbiting in space,it is of great importance to develop a reliable model that can predict the highly dynamic variations in outer radiation belt electron *** the present study,we develop a forecast model of radiation belt electron fluxes based on the data assimilation method,in terms of Van Allen Probe measurements combined with three-dimensional radiation belt numerical *** forecast model can cover the entire outer radiation belt with a high temporal resolution(1 hour)and a spatial resolution of 0.25 L over a wide range of both electron energy(0.1-5.0 MeV)and pitch angle(5°-90°).On the basis of this model,we forecast hourly electron fluxes for the next 1,2,and 3 days during an intense geomagnetic storm and evaluate the corresponding prediction *** model can reasonably predict the stormtime evolution of radiation belt electrons with high prediction efficiency(up to~0.8-1).The best prediction performance is found for~0.3-3 MeV electrons at L=~3.25-4.5,which extends to higher L and lower energies with increasing pitch *** results demonstrate that the forecast model developed can be a powerful tool to predict the spatiotemporal changes in outer radiation belt electron fluxes,and the model has both scientific significance and practical implications.

关键词： Earth’s outer radiation belt data assimilation electron flux forecast model performance evaluation