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Analysis of the energy-minimization multiscale model with multiobjective optimization

Particuology 2020年第1期18卷 109-115页

作者： yi mo Mengjie Du Wei Ge Pingwen Zhang School of Mathematical Sciences Peking UniversityBeijing 100871China State Key Laboratory of Multi-phase Complex Systems(MPCS) Institute of Processing Engineering(IPE)Chinese Academy of Sciences(CAS)Beijing 100190China School of Chemical Engineering University of the Chinese Academy of Sciences(UCAS)Beijing 100049China

Gas-solid two-phase flow is ubiquitous in nature and many engineering fields,such as chemical engineering,energy,and *** closure of its hydrodynamic model is difficult owing to the complex multiscale structure of such *** address this problem,the energy-minimization multi-scale(EMMS)model introduces a stability condition that presents a compromise of the different dominant mechanisms involved in the systems,each expressed as an extremum ***,in the physical system,each dominant mechanism should be expressed to a certain extent,and this has been formulated as a multiobjective optimization problem according to the EMMS principle generalized from the EMMS *** mathematical properties and physical meanings of this multiobjective optimization problem have not yet been *** paper presents a numerical solution of this multiobjective optimization problem and discusses the correspondence between the solution characteristics and flow regimes in gas-solid *** suggests that,while the most probable flow structures may correspond to the stable states predicted by the EMMS model,the noninferior solutions are in qualitative agreement with the observable flow structures under corresponding *** demonstrates that both the dominant mechanisms and stability condition proposed for the EMMS model are physically reasonable and consistent,suggesting a general approach of describing complex systems with multiple dominant mechanisms.

关键词： Energy-minimization multi-scale model Multiobjective optimization Flow regime transition

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Foxg1 mRNA overexpression in neonatal rats following hypoxic brain injury

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Neural Regeneration Research 2011年第1期6卷 41-46页

作者： Luquan Li yi Zheng Guoliang mo Fang Li Jialin Yu Neonatal Diagnosis and Treatment Center Children's Hospital of Chongqing Medical University Chongqing 400014 China

Forkhead box G1 （Foxgl） is expressed during the embryonic stage and in postnatal brain regions sensitive to hypoxia/ischemia injury, such as the hippocampus and cerebral cortex. To date, very little is known about Foxgl expression changes in the brain following hypoxia injury （HI）. The present study measured Foxgl mRNA expression using reverse-transcription polymerase chain reaction on days 3, 7, 14, 28, and 56 following HI to determine self-restorative features in the injured brain. In addition, mRNA expression of other related layer markers, such as Reelin, RORB, Foxpl, Foxp2, ER81, and Otx-1, was detected following HI. Results revealed significantly decreased Foxgl mRNA expression at 3 days after HI, which significantly increased by 56 days. Reelin and Foxp2 mRNA expression were upregulated until 56 days after HI, but Foxpl and ER81 mRNA expression decreased from day 14 to 56 following HI. In addition, Otx-1 and RORI3 mRNA expression decreased from day 3 to 28 after HI. These findings revealed Fxogl mRNA overexpression and varying degrees of restoration in the neonatal rat brain following HI.

关键词： Foxgl mRNA hypoxia injury neonatal rats cerebral cortex

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Rheological properties and concentration evolution of thickened tailings under the coupling effect of compression and shear

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 862-876页

作者： Aixiang Wu Zhenqi Wang Zhuen Ruan Raimund Bürger Shaoyong Wang yi mo Key Laboratory of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China Shunde Innovation School University of Science and Technology BeijingFoshan 528399China CI2MA and Departamento de Ingeniería Matemática Facultad de Ciencias Físicas y MatemáticasUniversidad de ConcepciónCasilla 160-CConcepciónChile School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China China Railway Construction Tongguan Investment Co. Ltd.Tongling 244000China

Cemented paste backfill(CPB)is a key technology for green mining in metal mines,in which tailings thickening comprises the primary link of CPB ***,difficult flocculation and substandard concentrations of thickened tailings often *** rheological properties and concentration evolution in the thickened tailings remain ***,traditional indoor thickening experiments have yet to quantitatively characterize their rheological *** experiment of flocculation condition optimization based on the Box-Behnken design(BBD)was performed in the study,and the two response values were investigated:concentration and the mean weighted chord length(MWCL)of ***,optimal flocculation conditions were *** addition,the rheological properties and concentration evolution of different flocculant dosages and ultrafine tailing contents under shear,compression,and compression-shear coupling experimental conditions were tested and *** results show that the shear yield stress under compression and compression-shear coupling increases with the growth of compressive yield stress,while the shear yield stress increases slightly under *** order of shear yield stress from low to high under different thickening conditions is shear,compression,and compression-shear *** compression and compression-shear coupling,the concentration first rapidly increases with the growth of compressive yield stress and then slowly increases,while concentration increases slightly under *** order of concentration from low to high under different thickening conditions is shear,compression,and compression-shear ***,the evolution mechanism of the flocs and drainage channels during the thickening of the thickened tailings under different experimental conditions was revealed.

关键词： thickened tailings compression-shear coupling compressive yield stress shear yield stress concentration

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China's Aid in Higher Education Sector of Myanmar and Its Effects(2010-2020):A Case Study of Chinese Government Scholarship Program

China's Aid in Higher Education Sector of Myanmar and Its Ef...

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作者： yi mo n 山东大学

学位级别：硕士

The Sino-Myanmar relationship was symbolized as a "Pauk-Phaw"(kinsfolk)friendship.A turning point was brought about in the political atmosphere of Myanmar with a transition to democracy in 2010,and consequently,a large quantity of foreign aid started to set foot in Myanmar with different purposes under diverse *** also did not lag behind in implementing its own assistance programs like other countries,America's USAID,Korea's KOICA,and Japan's *** support for the Myanmar education sector,which is implementing educational reforms throughout the democracy period,has become one of China's key education aid strategies in *** China's aid to education in Myanmar may not have been as substantial as that of other countries,its activities in Myanmar have gained recognition in recent ***,the Chinese government offers a significant number of scholarships,surpassing even some powerful *** Myanmar's status as a developing countiy in dire need of human capital for its development,China's educational support has played a crucial role in shaping policies across various *** no studies have been conducted on how China uses higher education to project its soft power in Myanmar,this study aims to have a deeper understanding on China's education aid in Myanmar,with a specific focus on the Chinese Government Scholarship Programs,and analyze its potential impacts on Sino-Myanmar relations in terms of politics and people-to-people ***,the study explores the attitudes of Myanmar students who have been recipients of the Chinese Government Scholarship,providing valuable insights into their perspectives on Sino-Myanmar *** research serves as a practical endeavor to enhance understanding of China's education aid in Myanmar,especially at the tertiary *** paper further argues the underlying causes for being less popular scholarship and suggests to overcome that predicament.

关键词： Higher Education China's Education Aid Public Diplomacy Soft Power

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Serum vitamin D and vitamin-D-binding protein levels in children with chronic hepatitis B

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World Journal of Gastroenterology 2021年第3期27卷 255-266页

作者： Cai-Zhi Huang Jie Zhang Lin Zhang Cui-Hua Yu yi mo Li-Ya mo Department of Laboratory Medicine Hunan Children’s HospitalChangsha 410007Hunan ProvinceChina Department of GCP Certified Sites The Third Hospital of Changsha CityChangsha 410005Hunan ProvinceChina

BACKGROUND Vitamin D is an essential fat-soluble secosteroid hydroxylated by the liver to form the intermediate metabolite calcidiol{25-hydroxy vitamin D[25(OH)D]},which is a reliable indicator to investigate individual vitamin D ***-D-binding protein(VDBP)is a multifunctional glycoprotein mainly synthesized in the liver and the major transport protein for vitamin D and its *** vitamin D and VDBP are both associated with hepatitis ***,few studies have reported the relationship and clinical significance of vitamin D and VDBP with hepatitis B virus(HBV)replication and hepatic fibrosis in children with chronic hepatitis B(CHB).AIM To explore vitamin D and VDBP serum levels in children with CHB and the association of vitamin D and VDBP with HBV replication and hepatic *** We enrolled 204 children with CHB admitted to Hunan Children’Hospital in summer and autumn between 2018 and 2019 and 170 healthy *** patients included:164 hepatitis B e antigen(HBeAg)positive and 40 HBeAg negative;193 hepatitis B surface antigen(HBsAg)positive and 11 HBsAg negative;164 with detectable HBV deoxyribonucleic acid(DNA)and 40 with undetectable HBV DNA;131 with HBV genotype B and 23 with HBV genotype C;and 27 without hepatic fibrosis and 97 with hepatic *** levels of 25(OH)D,VDBP,liver function markers,and other clinical parameters were collected to analyze their association with vitamin D and ***-Whitney U test,Kruskal-Wallis H test,or t test was used to analyze serum 25(OH)D and VDBP levels in different *** rank correlation test was utilized to analyze the correlation of 25(OH)D and VDBP with other *** significant factors determined by univariate analysis were further analyzed by binary multivariate logistic regression analysis.PmoL/L)and VDBP[122.40(70.74-262.84μg/L)]levels than hea

关键词： Chronic hepatitis B Children Vitamin D Vitamin-D-binding protein Hepatitis B virus

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Valence bond description for structures of O_(3), SO_(2) and NO_(2)^-

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Chinese Journal of Chemistry 1993年第6期11卷 490-498页

作者： WU Wei mo yi-Rong ZHANG Qian-Er Department of Chemistry Xiamen UniversityXiamen 361005

A modern valence bond approach, namely bonded tableau unitary group approach, is applied to ozone, sulphur dioxide and nitrite systems, respectively. It is shown that the biradical structure is in the primary position in descrbing the molecular structure of ozone. Thus three instead of two resonance structures are needed to describe the ground state of ozone. The case of sulphur dioxide is similar to that of ozone. It is found that, however, for the nitrite anion four resonance structures are needed.

关键词： SO2 and NO2 Valence bond description for structures of O3 NO

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Simultaneously improving fabrication accuracy and interfacial bonding strength of multi-material projection stereolithography by multi-step exposure

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International Journal of Smart and Nano Materials 2024年第2期15卷 387-404页

作者： Xinghong Deng Guangyu Zhang yi mo Zhiyuan Huang Dekai Zhou Jing Qiao Longqiu Li State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbinChina School of Materials Science and Engineering Harbin Institute of TechnologyHarbinChina

Multi-material additive manufacturing(MMAM)takes full advantage of the ability to arbitrarily place materials of addi-tive manufacturing technology,enabling immense design free-dom and functional print *** MMAM technologies,projection stereolithography(PSL)exhibits a great balance of high resolution and fast printing ***,fabrication accuracy of multi-material PSL is hin-dered by large overcure used to strengthen interfacial bond-ing weakened by chemical affinity and material-exchange *** present a novel multi-step exposure method for multi-material PSL process to overcome this ***,the whole layer is moderately exposed producing over-cure of single-material PSL level to generate *** weakened interfaces are strengthened individually with addi-tional steps of *** multi-step exposure is integrated into the already efficient materials printing order of multi-material PSL *** depth and overcure of photocur-able resins are modeled and *** required to achieve sufficient interfacial bonding of single-material interfaces built through material-exchange process and multi-material interfaces with altering materials printing order is determined with tensile *** channels are used to compare fabrication accuracy of traditional single-step exposure and our multi-step exposure *** method can be widely applied in multi-material PSL to improve fabri-cation accuracy in a variety of applications including micro-fluidic devices.

关键词： Additive manufacturing multi-material projection stereolithography multi-step exposure interfacial bonding

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Calcium Signaling is Involved in Negative Phototropism of Rice Seminal Roots

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Rice science 2014年第1期21卷 39-46页

作者： CHEN Juan mo yi-wei XU Hua-wei Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization College of Chemistry and Life Science Huanggang Normal University Institute of South Subtropical Crop Research Institute Chinese Academy of Tropical Agricultural Science College of Life Science Shaoxing University College of Agriculture Henan University of Science and Technology

Calcium ions （Ca2＋） act as an intracellular second messenger and affect nearly all aspects of cellular life. They are functioned by interacting with polar auxin transport, and the negative phototropism of plant roots is caused by the transport of auxin from the irradiated side to the shaded side of the roots. To clarify the role of calcium signaling in the modulation of rice root negative phototropism, as well as the relationship between polar auxin transport and calcium signaling, calcium signaling reagents were used to treat rice seminal roots which were cultivated in hydroculture and unilaterally illuminated at an intensity of 100-200 pmol/（m2.s） for 24 h. Negative phototropism curvature and growth rate of rice roots were both promoted by exogenous CaCI2 lower than 100 pmol/L, but inhibited by calcium channel blockers （verapamil and LaCI3）, calcineurin inhibitor （chlorpromazine, CPZ）, and polar auxin transport inhibitor （N-l-naphthylphthalamic acid, NPA）. Roots stopped growing and negative phototropism disappeared when the concentrations increased to 100 pmol/L verapamil, 12.500 ~Jmol/L LaCI3, 60 pmol/L CPZ, and 6 pmol/L NPA. moreover, 100 pmol/L CaCI2 could relieve the inhibition of LaCI3, verapamil and NPA. The enhanced negative phototropism curvature was caused by the transportation of more auxin from the irradiated side to the shaded side in the presence of exogenous Ca2＋. Calcium signaling plays a key role as a second messenger in the process of light signal regulation of rice root growth and negative phototropism.

关键词： calcium signaling polar auxin transport calcium channel blocker second messenger negative phototropism

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Data-driven parity-time-symmetric vector rogue wave solutions of multi-component nonlinear Schrödinger equation

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Chinese Physics B 2022年第6期31卷 137-144页

作者： Li-Jun Chang yi-Fan mo Li-Ming Ling De-Lu Zeng School of Mathematics South China University of TechnologyGuangzhou 510640China

Rogue waves are a class of nonlinear waves with extreme amplitudes,which usually appear suddenly and disappear without any ***,the parity-time(PT)-symmetric vector rogue waves(RWs)of multi-component nonlinear Schrödinger equation(n-NLSE)are usually derived by the methods of integrable *** this paper,we utilize the multi-stage physics-informed neural networks(MS-PINNs)algorithm to derive the data-driven symmetric vector RWs solution of coupled NLS system in elliptic and X-shapes domains with nonzero boundary *** results of the experiment show that the multi-stage physics-informed neural networks are quite feasible and effective for multi-component nonlinear physical systems in the above domains and boundary conditions.

关键词： nonlinear Schrödinger equation vector rogue waves deep learning numerical simulations

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Bond-distorted Orbitals and Their Application to Benzene

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Chemical Research in Chinese Universities 1993年第4期9卷 335-338页

作者： mo yi-rong , WU Wei and ZHANG Qian-er (Department of Chemistry, Xiamen University, Xiamen, 361005)

The present paper covers a kind of localized orbitals, namely bond-distorted or-bitals in the valence bond calculation. Test calculation on benzene is reported. The results indicate that Dewar structures are important... 详细信息

关键词： Ab initio Valence bond Bond-distorted orbital (EDO) Benzene

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