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Gas-solid coupling laws for deep high-gas coal seams

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International Journal of Mining Science and technology 2017年第4期27卷 675-679页

作者： Zhou Aitao Wang Kai Fan Lingpeng t.a. Kiryaeva Beijing Key Laboratory for Precise Mining of lntergrown Energy and Resources China University of Mining & Technology Beijing 100083 China School of Resource & Safety Engineering State Key Laboratory of Coal Resources and Mine Safety China University of Mining & Technology Belting 100083 China Chinakal Institute of Mining Siberian Branch Russian Academy of Sciences Krasnyi pr. 54 Novosibirsk 630091 Russia

A better understanding of gas-solid coupling laws for deep, gassy coal seams is vital for preventing the compound dynamic disasters such as rock burst.a.d gas outburst. In this paper, a gas-solid coupling theoretical model under the influence of ground stress, gas pressure, and mining depth is established and simulated by using COMSOL Multiphysics soft.a.e. Research results indicate t.a. under the influence of factors such as high ground stress and gas pressure, the mut.a. coupling interaction between coal and gas is much more significant, which leads to the emergence of new characteristics of gas compound dynamic disasters. Reducing the ground stress concent.a.ion in front of the working face can not only minimize the possibility of rock burst.a.cidents, which are mainly caused by ground stress, but.a.so can weaken the role of ground stress as a barrier to gas, thereby decreasing the number of outburst.a.cidents whose dominant factor is gas. the results have a great theoretical and practical significance in terms of accident prevention, enhanced mine safety, disaster prevention system design, and improved accident emergency plans.

关键词： Deep mining Gassy coal seam Gas-solid coupling Dynamic disaster

Impact of Pollutant Concent.a.ion and Particle Deposition on the Radiative Flow of Casson-Micropolar Fluid between Parallel Plates

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 665-690页

作者： Ghaliah Alhamzi Badr Saad t.a.kahtani Ravi Shanker Dubey Vinut.a.Kalleshachar Neelima Nizampat.a. Department of Mathematics and Statistics College of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh11564Saudi Arabia Department of Mathematics College of ScienceKing Saud UniversityRiyadh11989Saudi Arabia Department of Mathematics Amity School of Applied SciencesAmity University RajasthanJaipur302002RajasthanIndia Department of Studies in Mathematics Davangere UniversityDavangere577002India Department of Electronics and Communication Engineering Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluru560035India

Assessing the behaviour and concent.a.ion of waste pollutants deposited between two parallel plates is essent.a. for effective environmental *** the effectiveness of treatment methods in reducing pollution scales is made easier by analysing waste discharge *** waste discharge concent.a.ion analysis is useful for assessing how effectively wastewater treatment techniques reduce pollution *** study aims to explore the Casson micropolar fluid flow through two parallel plates with the influence of pollutant concent.a.tion and thermophoretic particle *** explore the mass and heat t.a.sport features,thermophoretic particle deposition and thermal radiation are *** governing equations are t.a.sformed into ordinary different.a. equations with the help of suitable similarity *** Runge-Kut.a.Fehlberg’s fourthfifth order technique and shooting procedure are used to solve the reduced set of equations and boundary *** integration of a neural network model based on the Levenberg-Marquardt.a.gorithm serves to improve the accuracy of predictions and optimize the analysis of *** outcomes are displayed to analyze the characteristics of the relevant dimensionless parameters in the current *** reveal t.a. concent.a.ion upsurges as the micropolar parameter *** concent.a.ion reduces with an upsurge in the thermophoretic *** upsurge in the external pollutant source variation and the local pollutant external source parameters enhances mass *** surface drag force declines for improved values of porosity and micropolar parameters.

关键词： Micropolar fluid thermal radiation porous medium thermophoretic particle deposition waste discharge concent.a.ion

A NEW SPIROPLASMA FROM tHE SURFACE OF PLANt FLOWER IN CHINA

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Science China Chemistry 1991年第3期34卷 290-296页

作者：郭永红叶旭东陈永萱 CHEN t.a. Depart.a.t of Plant Protection Nanjing Agricultural University Department of Plant Pathology Rutgers University

the st.a.n CCH, isolated from the surface of the plant flower in China, is a wall- less,helical prokaryote which passes through a microfilter 0. 22 μm in diameter. Cholesterol isrequired for its growth. the st.a.n CCH could metabolize glucose, fructose, maltose, treha-lose and arginine, but not urea. Its electrophoresis pattern of cell proteins is distinct fromt.a. of other spiroplasmas. the guanine-plus-cyrosine content of its DNA determined bymelting temperature is 29. 15 mol%. No relation with any known spiroplasmas was found inenzyme-linked immunosorbent.a.say and deformation tests. According to these results, thest.a.n CCH is referred to a new species in the genus of Spiroplasma or the representative ofa new spiroplasma group.

关键词： new flower spiroplasma morphology and characterization identification

Acute phase reaction and acute phase proteins

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第11期6卷 1045-1056页

作者： GRUYS E. tOUSSAINt M.J.M. NIEWOLD t.a. KOOPMANS S.J. Department of Pathobiology Faculty of Veterinary Medicine Utrecht University Utrecht the NetherlandsDepartment of Pathobiology Faculty of Veterinary Medicine Utrecht University Utrecht the NetherlandsAnimal Sciences Group Wageningen University Research Lelystad the NetherlandsAnimal Sciences Group Wageningen University Research Lelystad the Netherlands

A review of the systemic acute phase reaction with major cytokines involved, and the hepatic metabolic changes, negative and positive acute phase proteins (APPs) with function and associated pathology is given. It.a.pears t.a. APPs represent.a.propriate analytes for assessment of animal health. Whereas they represent non-specific markers as biological effect reactants, they can be used for assessing nutritional deficits and reactive processes, especially when positive and negative acute phase variables are combined in an index. When such acute phase index is applied to separate healthy animals from animals with some disease, much better results are obtained t.a. with single analytes and statistically acceptable results for culling individual animals may be reached. Unfortunately at present no cheap, comprehensive and easy to use system is available for assessing various acute phase proteins in serum or blood samples at the same time. Protein microarray or fluid phase microchip technology may satisfy this need; and permit simultaneous analysis of numerous analytes in the same small volume sample and enable integration of information derived from systemic reactivity and nutrition with disease specific variables. Applying such technology may help to solve health problems in various countries not only in animal husbandry but.a.so in human populations.

关键词： Acute phase protein Acute phase reaction Animal health Assessment Cytokine Index Nutrition

t.a.sport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN t.a.GHAR Z.ABBAS Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

this paper examines the t.a.sport.a.alysis, including both heat t.a.sfer and mass t.a.sfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. the influence of magnetic fields is also inspected in terms of their physical characteristics. to depict the phenomena of t.a.sport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as part.a. different.a. equations(PDEs)for momentum, concent.a.ion, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).the effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concent.a.ion, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass t.a.sfer rate, heat t.a.sfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate t.a. the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified t.a. the concent.a.ion rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

关键词： Peclet number

the impact of alpha-fetoprotein(AFP),child-turcotte-pugh(CtP)score and disease staging on the survival of hepatocellular carcinoma(HCC)patients:a retrospective cohort from single oncology center

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Oncology Research 2025年第1期33卷 149-160页

作者： NASSER MULLA YOUSEF KAtIB ASIM M.ALMUGHAMSI DUAA S.ALKHAYAt MOHAMED MOSAAD SAMIR t.a.FOtIH RAWAN ALAOFI Department of Internal Medicine Faculty of MedicineTaibah UniversityMadinah42278Saudi Arabia Department of Radiology Faculty of MedicineTaibah UniversityMadinah42278Saudi Arabia Department of Surgery Faculty of MedicineTaibah UniversityMadinah42278Saudi Arabia Department of Endemic and Infectious Diseases Suez Canal UniversityIsmailia41522Egypt King Salman bin Abdulaziz Medical City Madinah42311Saudi Arabia Prince Mohammed Bin Abdulaziz Hospital Madinah41511Saudi Arabia

Background:Hepatocellular carcinoma(HCC)is the most common cause of cancer-related death in Saudi *** study aimed to investigate the patterns of HCC and the effect of tNM staging,Alfa-fetoprotein(AFP),and Child-turcotte Pugh(CtP)on patients’overall survival(OS).Methods:A retrospective analysis was conducted on 43 HCC patients at.a.single oncology center in Saudi Arabia from 2015 to *** patients had to fulfill one of the following criteria:(a)a liver lesion reported as definitive HCC on dynamic imaging and/or(b)a biopsy-confirmed ***:the mean patient.a.e of all HCC cases was 66.8 with a male-to-female ratio of 3.3:*** patients were st.a.ified into two groups:viral HCC(n=22,51%)and non-viral HCC(n=21,49%).Among viral-HCC patients,55%were due to HBV and 45%due to *** was diagnosed in 79%of *** and sex did not significantly statistically differ in OS among viral and non-viral HCC patients(p-value>0.05).About 65%of patients had tumor size>5 cm during the diagnosis,with a significant statistical difference in OS(p-value=0.027).AFP was>400 ng/ml in 45%of the *** was a statistically significant difference in the OS in terms of AFP levels(p-value=0.021).A statistically significant difference was also observed between the CtP score and OS(p-value=0.02).CtP class B had the longest *** was the most common treatment provided to HCC patients followed by sorafenib *** was a significant statistical difference in OS among viral and non-viral HCC patients(p-value=0.008).Conclusions:the most common predictors for OS were the underlying cause of HCC,AFP,and tumor *** having non-viral etiology,a tumor size>5 cm,an AFP>400 ng/mL,and a CtP score class C were all negatively associated with OS.

关键词： Hepatocellular carcinoma Pattern Alpha-fetoprotein(AFP) Child-turcotte-pugh Progression free survival

Physical vapor t.a.sport growth and morphology of Bi2Se3 microcrystals

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Particuology 2016年第3期14卷 118-122页

作者： V.V. Atuchin S.V. Borisov t.a. Gavrilova K.A. Kokh N.V. Kuratieva N.V. Pervukhina Laboratory of Optical Materials and Structures Institute of Semiconductor Physics SB RAS Novosibirsk 630090 Russia Functional Electronics Laboratory Tomsk State University Tomsk 634050 Russia Laboratory of Semiconductor and Dielectric Materials Novosibirsk State University Novosibirsk 630090 Russia Laboratory of Crystul Chemistry Institute of Inorganic Chemistry SB RAS Novosibirsk 630090 Russia Laboratory of Nanodiagnostics and Nanolithography Institute of Semiconductor Physics SB RAS Novosibirsk 630090 Russia Laboratory of Crystal Growth Institute of Geology and Mineralogy SB RAS Novosibirsk 630090 Russia Geology and Mineralogy Department Novosibirsk State University Novosibirsk 630090 Russia Spintronics Laboratory Saint Petersburg State University Saint Petersburg 198504 Russia Laboratory of Research Methods of Composition and Structure of Functional Materials Novosibirsk State University Novosibirsk 630090 Russia

High-quality Bi2Se3 microcrystals were grown by the physical vapor t.a.sport （PVt） method without using a foreign t.a.sport.a.ent. the microplate crystals grown under the optimal temperature gradient.a.e well faceted and have dimensions up to -200 μm, the growth proceeds by the layer-by-layer mecha- nism with the formation of flat low-growth rate facets. the phase composition of the grown crystals was identified by the X-ray single crystal structure analysis in space group R3m, a = 4.1356（3）, C= 28.634（5）A, Z=3 （R=0.0147）. the most probable twin planes in the tet.a.ymite structure were evaluated by the pseudo t.a.slational sublattice merhad.

关键词： Bi2Se3 Physical vapor t.a.sport Structure twin

Free vibration and t.a.sient response of double curved beams connected by intermediate st.a.ght beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-tALOOKOLAEI H.GHANDVAR E.JUMAEV S.KHAtIR t.CUONG-LE School of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for Engineering Application and technology Solutions Ho Chi Minh City Open University

this paper investigates the free vibration and t.a.sient response of interconnected structures including double curved beams and intermediate st.a.ght beams,which are all constructed from functionally graded porous(FGP) materials. the st.a.n potent.a. and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. the curved and st.a.ght beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and t.a.sient response of the system are determined. the accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial soft.a.e ANSYS, demonst.a.ing excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and t.a.sient response of the considered structure.

关键词： Kinetic energy

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