Tài liệu, tai lieu

An investigation of the structural characteristics of modified cellulose from acacia pulp - Doan Minh Khai
The modified acacia celluloses from acacia pulp in Vietnam have some different characteristics from the Canadian softwood cellulose, the Indonesian hardwood cellulose and the initial acacia pulp. As the initial acacia pulp, CND and INDO, the AH-7.5 sample is a cellulose I, and the AH-15 sample is a cellulose II. The cellulose I of modified acaci...
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 1053 | Lượt tải: 0
A method of real-Time nurbs interpolation with confined chord error for cnc systems
In this paper, a real-time interpolation method is presented for parametric NURBS curves. The interpolation algorithm is based on the second order Taylor’s expansion. This method canA method of real-time NURBS interpolation with confined chord error for CNC systems 657 maintain a small feedrate fluctuation, but the chord error can be large at po...
8 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 893 | Lượt tải: 0
A systematic approach to the dilemma between flood vulnerability and resilience - Review and concepts - Hoang Cong Tri
The proposed framework integrates major points of the flipping coin (vulnerability and resilience are normalized as stress and resources, and they are two sides of the same coin) and separation concepts (vulnerability and resilience both can generate positive and/or negative outcomes) to address the dynamic interactions between ecological vulner...
17 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 1021 | Lượt tải: 0
Structural and optical properties in near infrared of cdtese coloidal quantum dots for potential application in solar cells
By the method of fabricating quantum dots at 260 oC in 10 minutes, alloyed CdTeSe QDs have been formed with good crystallization and zinc-blende single phase. Raman spectra results were completely in sync with XRD, therefore Raman spectra could be used as an effective tool to estimate the Se and Te compositions available in CdTeSe QDs. Studies o...
11 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 914 | Lượt tải: 0
Electrodeposition of hydroxyapatite/functionalized carbon nanotubes (hap/fcnts) coatings on the surface of 316l stainless steel
Hydroxyapatite/functionalized carbon nanotubes (HAp/fCNTs) coatings were synthesized successfully on the surface of 316L SS substrate by electrodeposition technique. The presence of fCNTs in the HAp/fCNTs nanocomposite decrease the solubility and improve the mechanical properties of the material. In our next studies, we will continue to investig...
10 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 844 | Lượt tải: 0
The transfer matrix method for modal analysis of cracked multistep beam - Vu Thi An Ninh
In the present paper a simplified version of the transfer matrix method has been developed for modal analysis of multiple cracked stepped beam based on an explicit expression of mode shape of multiple cracked uniform beam element. The simplification consists of that the beam state needs to be transferred only through steps of beam but not over t...
14 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 1142 | Lượt tải: 0
Effect of the carbonization and activation processes on the adsorption capacity of rice husk activated carbon
The effect of process parameters on the I and MB adsorption capacity have been investigated. The results showed that temperature and retention time of the carbonization and activation process effect significantly to the adsorption capacity. Based on the experimental data, the best conditions were identified for carbonization as temperature of 50...
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 788 | Lượt tải: 0
Fabrication and experiment of an electrical generator for sea wave energy - Nguyen Van Hai
In present paper, we show some results in fabrication and experiment of the electrical generator for sea wave energy. The device works in the vertical direction of sea waves, its generator part is fixed on the bottom of the sea in order to overcome the impact of sea storms as it operates at the sea. The output power of the device is generated up...
13 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 861 | Lượt tải: 0
Membrane scaling during seawater desalination by direct contact membrane distillation
Results from this study demonstrate notable influence of increased feed salinity and membrane scaling on water flux at high water recoveries during the DCMD process of seawater. At water recoveries above 50 %, significant impacts of temperature and concentration polarization effects on water flux were observed, resulting in noticeable deviati...
8 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 821 | Lượt tải: 0
Synthesis and characterization of polythiophenes from hydrazone derivatives sidegroups - Vu Quoc Trung
We have successfully synthesized a new class of irregioregular polythiophene with hydrazine derivatives sidegroups using the chemical oxidative coupling reaction. Amorphous morphology affected by the irregular structure of the main polymer chain was confirmed by SEM observations. Based the TGA analysis, these polymers exhibit good stability, ...
6 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 694 | Lượt tải: 0

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