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Abstract. When the method of finite spheres is used for the solution of time-harmonic acoustic wave propagation problems in nonhomogeneous media, a mixed (or saddle-point) formulation is obtained in which the unknowns are the pressure fields and the Lagrange multiplier fields defined at the interfaces between the regions with distinct material pr...

30 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 334 | Lượt tải: 0

Abstract. This paper presents a method to build up statically admissible slip-line field and, as a result, the field of statically admissible stresses of plane-strain compression of a three-layer symmetric strip consisting of two different rigid perfectly plastic materials between rough, parallel, rigid plates The case is considered when the she...

15 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 374 | Lượt tải: 0

Abstract This study proposes a numerical model based on the depth-integrated non-hydrostatic shallow water equations with an improvement of wave breaking dissipation. Firstly, studies of parameter sensitivity were carried out using the proposed numerical model for simulation of wave breaking to understand the effects of the parameters of the br...

18 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 406 | Lượt tải: 0

Abstract. Based on the circle assemblage model, the effective properties of the inclusion with imperfect interface are derived. The equivalent inclusion is incorporated in the Fourier Transform algorithm to determine the effective conductivity of the composite with lowly conducting or highly conducting interface. The size effect is considered for...

9 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 330 | Lượt tải: 0

Abstract. Nanocomposites of graphene oxide (GO) and tungsten oxide (WO3) nanobricks were synthesized by co-dispersing graphene oxide and tungsten oxide nanobricks in bi-distilled water with different weight ratios (0.1, 0.3 and 0.5 wt.% of graphene oxide). The ammonia gas sensing properties of nanocomposites were studied at low temperatures (50,...

14 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 324 | Lượt tải: 0

Abstract. This paper presents free vibration analysis of functionally graded (FG) porous nanoplates based on isogeometric approach. Based on a modified power-law function, material properties are given. The nonlocal elasticity is used to capture size effects. According to a combination of the Hamilton’s principle and the higher order shear defor...

11 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 341 | Lượt tải: 0

Abstract. Load applied to the connecting-rod and the pressure in the lubricant oil film change the stress in the connecting-rod during the operating cycle. This problem is one of the characteristics we need to consider when studying the connecting-rod big end bearing. A specific experimental device and the connecting-rod model of photoelastic ma...

14 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 348 | Lượt tải: 0

Abstract - This paper presents a fuzzy logic controller approach for controlling heat exchanger temperature. Fuzzy logic controller is an artificial intelligence-based controller. The fuzzy logic controller has been widely used for control applications in the industrial world. One of the tools used in the industrial world that requires accurate ...

8 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 368 | Lượt tải: 0

Abstract – In a developing country, the rate of electricity demand is increasing along with the increasing rate of population growth and the rate of economic development of the country. With the growing development of the use of electronic technology in power systems, more and more non-linear equipment is used in the industry. This non-linear e...

10 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 351 | Lượt tải: 0

Abstract – Glaucoma and diabetic retinopathy (DR) are the two most common retinal related diseases occurred in the world. Glaucoma can be diagnosed by measuring optic cup to disc ratio (CDR) defined as optic cup to optic disc vertical diameter ratio of retinal fundus image. A computer based optic disc is expected to assist the ophthalmologist t...

5 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 367 | Lượt tải: 0