• Mô phỏng ứng xử cơ học của đá khi nén một trục bằng phương pháp phần tử rời rạc sử dụng mô hình gắn kết képMô phỏng ứng xử cơ học của đá khi nén một trục bằng phương pháp phần tử rời rạc sử dụng mô hình gắn kết kép

    Modelling the mechanical behaviour of rock under uniaxial compression test by discrete element method with particle bonded model Abstract: The paper presents the use of discrete element method (DEM) via PFC2D software to simulate the mechanical behavior of rock under uniaxial compression. The rock is modelled as a assembly of rigid circular pa...

    pdf10 trang | Chia sẻ: thanhle95 | Ngày: 09/07/2021 | Lượt xem: 79 | Lượt tải: 0

  • Tìm hiểu các lực tương tácTìm hiểu các lực tương tác

    1. khái niệm nguyên tử Các nhà triết học cổ Hy Lạp cho rằng Vũ trụ được cấu thành từ những phần tử nhỏ bé không thể “cắt nhỏ” được và họ gọi là các nguyên tử. Họ đã quan niệm rằng các đối tượng vật chất đều được tạo thành từ tổ hợp của một số ít các viên gạch sơ cấp đó. Vào đầu những năm 1930, những công trình tập thể của Joseph John Thomson, ...

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  • Solation and mass production of TrichodermaSolation and mass production of Trichoderma

    Abstract: Three Trichoderma isolates (THDU-1, THDU-2, and THDU-3) were isolated from the root zone area of healthy bananas on the farm in Ba Thuoc district, Thanh Hoa province. All of these isolates showed high inhibitory activity against soil borne diseases Rhizoctonia solani and Sclerotium rolfsii. Our study proposed a protocol of Trichoderma ...

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  • A trial of Neolamarckia cadamba in Thanh Hoa provinceA trial of Neolamarckia cadamba in Thanh Hoa province

    Abstract: A trial of Neolamarckia cadamba in Thanh Hoa province has the following results: Neolamarckia cadamba is the easy growing and photophillic tree, highly adaptable to natural conditions of Thuong Xuan, Nhu Thanh, and Tinh Gia which are representatives of the mountainous area, midland area and delta coastal area, respectively, in Thanh Ho...

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  • Critical behavior in La0.7Sr0.3Mn0.98Cu0.02O3 compoundCritical behavior in La0.7Sr0.3Mn0.98Cu0.02O3 compound

    1. Introduction The perovskite manganites (La,Sr)MnB'O3, where B‟ stands for the transition elements have recently attracted a wide range of research in laboratories because of their potential applications in electric devices that operate based on colossal magnetoresistance effect (CMR) and magnetocaloric effect (MCE) [1-4]. Basically, the magnetic...

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  • Random variational inequalities for semi H-monotone mappingsRandom variational inequalities for semi H-monotone mappings

    4. Conclusion The theorems 3.4 and 3.5 solve some random variational inequalities for semi H-monotone and weakly semi H-monotone mappings. These are good results in solving random variational inequalities for semi H-monotone and weakly semi Hmonotone mappings.

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  • Rapid in vitro propagation of native Dendrobium chrysotoxumRapid in vitro propagation of native Dendrobium chrysotoxum

    Abstract: The rapid micropropagation of Dendrobium chrysotoxum by applying in vitro tissue culture has the following results: The VW containing 20g/l sucrose and 8g/l agar was the most suitable medium for seed germination. The appropriate medium for rapid protocorm multiplication and shoot formation was the basic MS supplemented with 20g/l sucro...

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  • Identical synchronization in complete network of ordinary differential equations of fitzhugh-nagumoIdentical synchronization in complete network of ordinary differential equations of fitzhugh-nagumo

    Abstract: Synchronization is a ubiquitous feature in many natural systems and nonlinear science. In this paper, the synchronization in complete network consisting of n nodes is studied. Each node is connected to all other nodes by linear coupling and it is represented by a system of ordinary differential equations of FitzHugh-Nagumo type which i...

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  • Determined absorption coefficient of 85Rb atom in the Y-configurationDetermined absorption coefficient of 85Rb atom in the Y-configuration

    1. Introduction The manipulation of subluminal and superluminal light propagation in optical medium has attracted many attentions due to its potential applications during the last decades, such as controllable optical delay lines, optical switching [2], telecommunication, interferometry, optical data storage and optical memories quantum informa...

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  • Novel exponential stability criterion of nonlinear systems with interval time-varying delaysNovel exponential stability criterion of nonlinear systems with interval time-varying delays

    Abstract: This paper presents a new result on delay-dependent exponential stability for nonlinear linear systems with interval time-varying delay. By constructing a set of improved Lyapunov-Krasovskii functionals combined with Wirtinger-based integral inequality, a new delay-dependent condition is established in terms of linear matrix inequality...

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