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Online since: October 2015
Authors: Jarmila Sosedova, Jan Zamecnik, Juraj Jagelcak
Other important commodities transported on Danube are coal, grain, timber, heavy – lift cargo, cars transported on Ro-Ro vessels (mainly in ports Kelheim, Regensburg).
There is also stated number of monitored cruises on each section (column “num”).
The data are stated in minutes, in column “num” are stated numbers of observed passes through particular lock chambers.
There is also stated number of monitored cruises on each section (column “num”).
The data are stated in minutes, in column “num” are stated numbers of observed passes through particular lock chambers.
Online since: January 2019
Authors: Shao Yu Qiu, Zheng Cao Li, Qian Peng, Jing Jing Liao, Zhong Bo Yang
Final annealing was carried out at 560 ℃ ~ 580 ℃ to obtain good recrystallized grains.
Corresponding to the stress release in t-ZrO2, the peak intensity of 280 cm-1 also decreased with thickness, indicating that t-ZrO2 gradually disappeared after the oxide thickness exceeded critical number.
The smaller valence of Sn will produce large amounts of oxygen vacancies inside the oxide, increasing the number of vacancies and affecting the stability of tetragonal phase.
Corresponding to the stress release in t-ZrO2, the peak intensity of 280 cm-1 also decreased with thickness, indicating that t-ZrO2 gradually disappeared after the oxide thickness exceeded critical number.
The smaller valence of Sn will produce large amounts of oxygen vacancies inside the oxide, increasing the number of vacancies and affecting the stability of tetragonal phase.
Online since: September 2006
Authors: Yu. V. Taran, E.C. Oliver, Mark R. Daymond, Jürgen Schreiber
A major concern in a number of applications including nuclear
power plants, however, is fatigue damage of ASS components.
Many investigations, using the conventional and diffraction methods, show the influence of material history (founding, cast, annealing, quenching, etc.) and martensitic transformation conditions (load amplitude, frequency, stress or strain control, temperature, value of R-ratio, number of cycles, etc.)
A more detailed understanding of this problem will also require additional microstructural examination for damage, texture and martensite grain shape.
Many investigations, using the conventional and diffraction methods, show the influence of material history (founding, cast, annealing, quenching, etc.) and martensitic transformation conditions (load amplitude, frequency, stress or strain control, temperature, value of R-ratio, number of cycles, etc.)
A more detailed understanding of this problem will also require additional microstructural examination for damage, texture and martensite grain shape.
Online since: January 2013
Authors: Li Li Cao, Li Ma, Fang Lei Teng, Ning Cui, Lei Liu, Hongzhi Cui
Most of the pores were through-hole and a small number of closed-pores spread on the matrix skeleton.
On the one hand, the high temperature liquid inhibited the grain growth.
Porous TiC-TiB2-NiAl composites could be produced by SHS using Ti, B4C, Ni, Al powders as raw materials and a large number of pores distributed on the matrix.
On the one hand, the high temperature liquid inhibited the grain growth.
Porous TiC-TiB2-NiAl composites could be produced by SHS using Ti, B4C, Ni, Al powders as raw materials and a large number of pores distributed on the matrix.
Online since: July 2020
Authors: H. Aripin, Sliven Sabchevski, Acep Irham Gufroni, Nundang Busaeri
Because of these advantageous characteristics, their use in an increasing number of engineering application have been extensively investigated.
The crystallization affect significantly the grain growth.
Republic of Indonesia through the Project of Higher Education Applied Research in 2018 (Contract Number: 091/SP2H/LT/DRPM/2018).
The crystallization affect significantly the grain growth.
Republic of Indonesia through the Project of Higher Education Applied Research in 2018 (Contract Number: 091/SP2H/LT/DRPM/2018).
Online since: May 2020
Authors: Jian Zhou Jin, Shuo Qiong Liu, Ming Xu, Zheng Rong Zhang, Xiu Jian Xia, Yong Jin Yu
Introduction
With the deepening of oil and gas exploration, the number of deep and ultra-deep wells is gradually increasing.
It is illustrated that DRPC-1L has weak retarding property on oil well cement and even has a certain early-strength function due to the presence of early strength polyether monomers, while DRS-1S displays strong retardation because of a large number of sulfonated groups in its molecular structure.
The reasons for this phenomenon are that the early-strength polyether can promote the hydration of C3A to produce ettringite (AFt), and the microscopic structure of set cement is denser due to the dispersing effect of polycarboxylic acid and the fine-grained effect of cement particles [15].
It is illustrated that DRPC-1L has weak retarding property on oil well cement and even has a certain early-strength function due to the presence of early strength polyether monomers, while DRS-1S displays strong retardation because of a large number of sulfonated groups in its molecular structure.
The reasons for this phenomenon are that the early-strength polyether can promote the hydration of C3A to produce ettringite (AFt), and the microscopic structure of set cement is denser due to the dispersing effect of polycarboxylic acid and the fine-grained effect of cement particles [15].
Online since: March 2025
Authors: Van Cuong Nguyen, Jeng Rong Ho, Hoai Tan Nguyen, Kim Vang Nguyen, Van Tai Nguyen
., m for number of experimental trials; and j = 1, 2, ..., n for number of output qualities.
Houbaert, Effect of laser cutting on microstructure and on magnetic properties of grain non-oriented electrical steels.
Houbaert, Effect of laser cutting on microstructure and on magnetic properties of grain non-oriented electrical steels.
Online since: September 2017
Authors: Akeem Ayinde Raheem, Mutiu A. Kareem
Nigeria was the second largest producer of rice in Africa and world number 17th position of the 20-world largest rice producer in 2010 with 4.03 million metric tons (0.6% of world production).
The husk covers the grains and contains high concentration of silica, generally more than 80-85 % [22].
PM1400/50, Serial Number 93021.A).
The husk covers the grains and contains high concentration of silica, generally more than 80-85 % [22].
PM1400/50, Serial Number 93021.A).
Online since: July 2024
Authors: Muhammad Amirul Ikmal, Ramizah Rozaimay, Tuan Zaharinie, Tadashi Ariga
As a result, the grain boundaries of the SS304 base metal contain significant amounts of chromium borides (Cr-B).
However, such an effect is not properly reflected in Table 4 as the EDS analysis of light elements (an atomic number less than 11) is inaccurate [29].
Acknowledgement All the authors are grateful and would like to thank the Universiti Malaya Research University Grant (RU Faculty) Project number: GPF063A-2018 for the financial support.
However, such an effect is not properly reflected in Table 4 as the EDS analysis of light elements (an atomic number less than 11) is inaccurate [29].
Acknowledgement All the authors are grateful and would like to thank the Universiti Malaya Research University Grant (RU Faculty) Project number: GPF063A-2018 for the financial support.
Online since: November 2017
Authors: Eleyas Assefa, Li Jian Lin, Costas I. Sachpazis, Deng Hua Feng, Sun Xu Shu
Following the design and construction of these new railway routes, a number of railway tunnels will be designed and constructed in the country.
The rock belongs to Ashangi formation (Tas) of Eocene age, which is composed of aphanitic to coarse grained basalt/ trachybasalt and volcanoclastics.
The factoring (1, 0.8, 0.4, 0.2, 0.1, 0.08, 0.04, 0.02, 0.01, and 0) of the applied internal pressure over a number of stages were used to determine the pressure that yielded the amount of tunnel wall deformation at the point of support installation (at 2 m distance from the face of the tunnel).
The rock belongs to Ashangi formation (Tas) of Eocene age, which is composed of aphanitic to coarse grained basalt/ trachybasalt and volcanoclastics.
The factoring (1, 0.8, 0.4, 0.2, 0.1, 0.08, 0.04, 0.02, 0.01, and 0) of the applied internal pressure over a number of stages were used to determine the pressure that yielded the amount of tunnel wall deformation at the point of support installation (at 2 m distance from the face of the tunnel).