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The Impact of Tidal Migration of Hot Jupiters on the Rotation of Sun-like Main-sequence Stars

Research in Astronomy and Astrophysics 2023年第9期23卷 148-161页

作者： shuai-shuai guo Yunnan Observatories Chinese Academy of SciencesKunming 650011China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Key Laboratory for the Structure and Evolution of Celestial Objects CASKunming 650011China

The tidal interactions of planets affect the stellar evolutionary status and the constraint of their physical parameters by *** this work,we incorporate the tidal interaction and magnetic braking of the stellar wind into MESA and calculate a large grid of 25,000 models,covering planets with masses of 0.1–13.0MJ with different orbital distances that orbit late-type stars of different *** also explore the effect of different stellar initial rotations on the tidal *** results show that in the case of tidal inward migration,the stellar rotation periods are always lower than that of the star without planet before the planet is engulfed and the difference in the rotation period of its host star always increases with *** the planet is engulfed,the stellar rotation periods are still lower than that of star without planet,but the difference of periods can be quickly eliminated if the star has a thick convective envelope(smaller mass and larger metallicity),regardless of the mass of the planet and the initial rotation period of the *** the case of stars with thinner convective envelopes(larger mass and smaller metallicity),the stars will be spun up and remain the faster rotation in a long ***,the planet is easily swallowed and the period differences are large if the initial rotation period of its host star is ***,we also study the evolution of WASP-19 and estimate the range of tidal quality parameter Q_(*)^(')=(4.6±0.9)×10^(6)and the initial semimajor axis as(0.035±0.004)au.

关键词： stars rotation-stars solar-type-planet-star interactions

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Effect of Blending Ratio on the Sodium Release Behaviors,Ash Slagging Characteristics and Char Gasification Performances during Co-gasification of Zhundong Coal with Wuhai Coal

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Journal of Thermal Science 2023年第1期32卷 448-456页

作者： guo shuai WANG Xiaofang Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China

Some ash related problems,such as slagging at furnace bottom and fouling at the air pre-heater surface,are frequently encountered during circulating fluidized bed gasification(CFBG)of Zhundong *** ash fusion temperatures(AFTs)and intense sodium release should be responsible for those *** industry,coal blending is deemed to be a feasible method to both improve AFTs and control sodium *** this work,Wuhai coal was selected as blending *** ratio is varied from 0%to 40%by mass with 10%*** mixed samples were gasified by steam at 950°C in a lab-scale *** key indices,such as sodium release behaviors,ash slagging characteristics and char gasification performances,were investigated by ICP-OES,AFTs,XRD and TG analyzers,*** results indicated that coal blending could significantly decrease sodium release *** ash slagging characteristics,it is surprised to find that three out of four AFTs(deformation temperature,softening temperature,hemispherical temperature)show an U-shaped correlation with blending ratio,indicating that a low ratio possibly causes more severe ash slagging *** is ascribed to the formation of substantial percentage of fusible Na-containing silicates and *** addition,coal blending greatly increases ST-DT,implying that the ability of resistance to bed temperature fluctuation is markedly *** to the high level of alkali and alkaline species,the synergistic effect is clearly observed during *** all key indices into consideration,30%blending ratio of Wuhai coal is recommended.

关键词： co-gasification coal blending ash slagging sodium release

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Proof of Two Supercongruences of Truncated Hypergeometric Series_(4)F_(3)

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Acta Mathematica Sinica,English Series 2024年第4期40卷 1015-1028页

作者： guo shuai MAO Department of Mathematics Nanjing University of Information Science and TechnologyNanjing 210044P.R.China

In this paper,we prove two supercongruences conjectured by Z.-*** via the Wilf-Zeilberger *** of them is,for any prime p>3,4F3[7/6 1/2 1/2 1/2 1/6 1 1]-1/8]-1/2≡p(-2/p)+p^(3)/4(2/p)Ep-3 (mod p^(4))where(·/p)stands f... 详细信息

关键词： Supercongruence truncated hypergeometric series Wilf–Zeilberger method Euler numbers Legendre symbol

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On a Supercongruence Conjecture of Z.-***

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Chinese Annals of Mathematics,Series B 2022年第3期43卷 417-424页

作者： guo-shuai MAO Department of Mathematics Nanjing University of Information Science and TechnologyNanjing 210044China

In this paper,the author partly proves a supercongruence conjectured by Z.-*** in *** p be an odd prime and let a∈Z^(+).Then,if p≡1(mod 3),[5/6p^(a)]∑k=0(2kk)/16^(k)≡(3/p^(a))(mod p^(2))is obtained,where(■)is the... 详细信息

关键词： Supercongruences Binomial coefficients Fermat quotient Jacobi symbol

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Quantum Curve and Bilinear Fermionic Form for the Orbifold Gromov–Witten Theory of P[r]

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Acta Mathematica Sinica,English Series 2024年第1期40卷 43-80页

作者： Chong Yao CHEN shuai guo Mathematics Department Duke UniversityBox 90320DurhamNC 27708-0320USA School of Mathematical Sciences Peking UniversityBeijing 100871P.R.China

We construct the quantum curve for the Baker-Akhiezer function of the orbifold Gromov-Witten theory of the weighted projective line P[r].Furthermore,we deduce the explicit bilinear Fermionic formula for the(stationary... 详细信息

关键词： Quantum curve Free Fermions Gromov-Witten invariants Orbifold P^(1)

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A Metadata Reconstruction Algorithm Based on Heterogeneous Sensor Data for Marine Observations

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Journal of Ocean University of China 2023年第6期22卷 1541-1550页

作者： guo shuai SUN Meng MAO Xiaodong College of Science Qingdao University of TechnologyQingdao 266520China College of Information and Control Engineering Qingdao University of TechnologyQingdao 266520China

Vast amounts of heterogeneous data on marine observations have been accumulated due to the rapid development of ocean observation *** state-of-art methods are proposed to manage the emerging Internet of Things(IoT)sensor ***,the use of an inefficient data management strategy during the data storage process can lead to missing metadata;thus,part of the sensor data cannot be indexed and utilized(i.e.,‘data swamp’).Researchers have focused on optimizing storage procedures to prevent such disasters,but few have attempted to restore the missing *** this study,we propose an AI-based algorithm to reconstruct the metadata of heterogeneous marine data in data swamps to solve the above ***,a MapReduce algorithm is proposed to preprocess raw marine data and extract its feature tensors in ***,load the feature tensors are loaded into a machine learning algorithm and clustering operation is *** similarities between the incoming data and the trained clustering results in terms of clustering results are also ***,metadata reconstruction is performed based on existing marine observa-tion data processing *** experiments are designed using existing datasets obtained from ocean observing systems,thus verifying the effectiveness of the *** results demonstrate the excellent performance of our proposed algorithm for the metadata recon-struction of heterogenous marine observation data.

关键词： Internet of Things(IoT) sensor data data swamp metadata reconstruction

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Assessment and control of the mine tremor disaster induced by the energy accumulation and dispersion of thick-hard roofs

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International Journal of Mining Science and Technology 2024年第7期34卷 925-941页

作者： Bin Yu Mingxian Peng Yang Tai shuai guo State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China School of Resources and Safety Engineering Chongqing UniversityChongqing 400044China School of Mines China University of Mining and TechnologyXuzhou 221116China

In order to solve the problem that current theory models cannot accurately describe thick-hard roof(THR)elastic energy and assess the mine tremor disasters,a theoretical method,a Timoshenko beam theory on Winkler foundation was adopted to establish the THR’s periodic breaking *** superposition principle was used for this complex model to derive the calculation formulas of the elastic energy and impact load on hydraulic ***,the influence of roof thickness h,cantilever length L_(1),and load q on THR’s elastic energy and impact load was ***,the effect of mine tremor disasters was ***,it is revealed that:(1)The THR’s elastic energy U exhibits power-law variations,with the fitted relationships U=0.0096L_(1)^(3.5866^),U=5943.9h^(-1.935),and U=21.049q^(2).(2)The impact load on hydraulic supports F_(ZJ) increases linearly with an increase in the cantilever length,thickness,and applied *** fitted relationships are F_(ZJ)=1067.3L_(1)+6361.1,F_(ZJ)=125.89h+15100,and F_(ZJ)=10420q+3912.6.(3)Ground hydraulic fracturing and liquid explosive deep-hole blasting techniques effectively reduce the THR’s cantilever length at periodic breakages,thus eliminating mine tremor disasters.

关键词： Dynamic disaster Energy Hard and thick roof Timoshenko beam

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The photoluminescence of Co-Al-layered double hydroxide

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Chinese Chemical Letters 2007年第11期18卷 1371-1373页

作者： shuai Sun Wan guo Hou Key Laboratory for Colloid and Interface Chemistry of Education Ministry Shandong University Jinan 250100 China

We report a new optical behaviour of pure Co-Al-layered double hydroxide （LDH）. It was found that the Co-Al-LDH sample could emit fluorescence without any fluorescent substances intercalated. Its excitation spectrum shows a maximum peak near the wavelength 370 nm, the maximum emission peak appears at 430 um and the photoluminescence colour of the Co-Al-LDH sample is blue. This new optical property will be expected to extend the potential applications of LDHs in optical materials field.

关键词： Layered double hydroxides Photoluminescence Optical materials

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Experimental study on influence of operating parameters on tar components from corn straw gasification in fluidized bed

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Frontiers in Energy 2021年第2期15卷 374-383页

作者： shuai guo Xiao WEI Deyong CHE Hongpeng LIU Baizhong SUN School of Energy and Power Engineering Northeast Electric Power UniversityJilin 132012China

Gasification is a promising approach for converting solid fuel sources, including renewable ones like biomass, for use. The main problem in biomass gasification is the formation of condensable tars, including polycyclic aromatic hydrocarbons (PAHs). This paper investigated the conversion of tar components during corn straw gasification. It analyzed collected tar components using a gas chromatograph-mass spectrograph (GC-MS). Experimental results indicate that, with increasing temperature from 700°C to 900°C, the concentrations of benzene, indene, phenanthrene, naphthalene, acenaphthylene, fluorene, and pyrene increased whereas those of toluene, phenol, 1-methylnaphthalene, and 2-methylnaphthalene decreased. As the equivalence ratio (ER) increased from 0.21 to 0.34, the concentrations of indene and phenanthrene increased from 0.148% and 0.087% to 0.232% and 0.223%, respectively. Further, the phenol content increased as ER increased from 0.21 to 0.26 and then decreased as the ER increased further to 0.34. Other parameters like the steam/biomass (S/B) ratio and catalyst also played a critical role in tar reduction. This paper demonstrates the conversion of some tar components and elucidates their chemical properties during gasification.

关键词： gasification tar components operating parameters

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Influence of α/β interface phase on the tensile properties of laser cladding deposited Ti–6Al–4V titanium alloy

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Journal of Materials Science & Technology 2017年第7期33卷 675-681页

作者： Zhuang Zhao Jing Chen shuai guo Hua Tan Weidong Huang State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072. China Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design MIIT China Northwestern Polytechnical University Xi'an 710072 China

Laser cladding deposited Ti-6Al-4V titanium alloy universally shows more complex microstructures,each of which has significant effect on mechanical properties. Of particular α/β interface phase has been observed in this paper under certain conditions. It demonstrates that the influence of the α/β interface phase on the tensile properties is closely associated with dislocations and twin substructure through comparison experiments. The results show that the α/β interface phase hinders dislocation motion and decreases effective slip length. In addition, the twin substructure has been activated in the α/β interface phase during tensile process and has acted somehow like grain boundaries. Therefore, the strength and the work-hardening rate of the laser cladding deposited Ti-6Al-4V titanium alloy have been significantly improved due to the dynamic Hall-Petch effect. Besides, the α/β interface phase leads to more uniform dislocations distribution, which implies that relative lower local concentrated stress will be produced along the α/β interface phase or colony boundary after the same amount of plastic deformation. Moreover,the twinning-induced plasticity effects in the α/β interface phase further increase the plastic deformation capacity. These results in higher elongation for the laser cladding deposited Ti-6Al-4V titanium *** can be concluded that the current work suggests an effective method to simultaneously improve the strength and plasticity of laser cladding deposited Ti-6Al-4V titanium alloy based on the α/β interface phase.

关键词： Ti-6Al-4V Laser cladding deposition α/β Interface phase Dislocation Twins Tensile properties

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