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Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective In the hydrogen purification system, in order to analyze the process energy, the influence of oxygen mole fraction in feedstock on heat release from hydrogen-oxygen reaction and reactor temperature was investigated. Method The energy consumption of the electric heater and the amount of cold consumed by the cooler were further calculated by the method of model calculation to enable the optimization of the process flow. Based on this, a new purification process of heat exchange regeneration gas was proposed, and the effects of oxygen mole fraction and logistics flow on system temperature were analyzed. Results The heating can meet the energy requirements only when the oxygen mole fraction is above 0.13%. Compared with the original process, the new heat exchange regeneration gas purification process can save more than 88% of the cooling capacity, and the operating temperature of the system can be maintained without electric heating. Conclusion The new heat exchange regeneration gas purification process can fully use the heat released by the hydrogen and oxygen reaction to heat the cold flow, save the electricity energy consumption and cooling capacity, and reduce operating costs. [ABSTRACT FROM AUTHOR]

Copyright of Chemical Engineering (China) / Huaxue Gongcheng is the property of Hualu Engineering Science & Technology Co Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Atomic Energy Science & Technology is the property of Editorial Board of Atomic Energy Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Under slippery conditions, the thickness of accumulated water is affected by uneven runways and changed by the fluctuation of the road surface, and the safety of aircraft take-off and landing is also affected. Therefore, the international flatness index (IRI) was introduced to build a tire-water-pavement finite element model based on the IRI. Through simulation, the influence of different IRI indexes on the critical hydroplaning speed of aircraft was analysed. Combined with IRI index, the reduction range of apparent friction coefficient of pavement with different tire speed and accumulated water thickness was compared, and the influence of IRI on pavement friction performance was analysed. According to the experimental results of apparent friction coefficient of an airport, the simulation results were modified to explore the influence of the IRI on aircraft braking effect. The results show that when the thickness of accumulated water in the pavement levelling section is constant, the critical water skiing speed of aircraft is reduced by the increase of IRI, and it is reduced by about 30% compared with the flat pavement when IRI = 5. When the speed of the aircraft tires is constant, the apparent friction coefficient of the pavement is decreased by the decrease of the level of the pavement smoothness. When IRI = 5, the apparent friction coefficient of the pavement is reduced by as much as 98% compared with the smooth pavement, which seriously affects the safety of the aircraft operation. When the road surface smoothness grade is “ good”, under the same thickness of accumulated water in the pavement levelling section, the apparent friction coefficient between the aircraft tire and the road surface is decreased by the increase of the IRI. Considering the influence of the IRI index and the apparent friction coefficient corrected by the test data on the braking effect of the aircraft, it is found that the braking effect of the aircraft will be degraded with the gradual increase of the flatness index and the thickness of accumulated water in the pavement levelling section. Under the conditions of a domestic airport pavement with 1. 5 < IRI≤2 and the thickness of accumulated water in the pavement levelling section≥7. 66 mm, the braking effect of the aircraft is reduced by a maximum of 2 grades, that is, from “ good to medium” to “medium to poor”, at this time the aircraft directional control and deceleration capabilities are decreased. When the flatness of the water surface is evaluated as “medium” or “ poor”, the degradation of the aircraft braking effect is increased suddenly, and the pavement surface conditions cannot be guaranteed the safety of aircraft operation. And when the thickness of accumulated water in the pavement levelling section is 7. 66 ~ 13 mm, the braking effect of the aircraft is greatly affected by the change of the IRI, and the degradation is changed obviously, so special attention should be paid during the maintenance process. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Beijing University of Technology is the property of Journal of Beijing University of Technology, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Construction of "blue granary" is an important move to implement China's maritime power strategy, and is of great strategic significance for maintaining sustainable development of marine resources and guaranteeing national food security. As a major fishery province, Guangdong Province has rich marine resources and is one of the key provinces for the construction of blue granary in China. This paper analyzes the development characteristics of the international blue granary industry powerhouses, the United States and Norway, and the domestic blue granary industry powerhouses, Shandong and Fujian, comparing and analyzing the main problems faced by the development of blue granary industry in Guangdong Province, such as insufficient level of scientific and technological innovation, low level of community participation and lack of supervision and management, and drawing on the initiatives and experience of the construction of the blue granary at home and abroad, it proposes promote the transformation and upgrading of the fisheries industry, promote the development of the marine tertiary industry; improve the capacity of fisheries science and technology research and development, accelerate the transformation of scientific and technological achievements in fisheries; play the role of fisheries associations to guide the masses to participate consciously; improve the legal management system, integration of management institutions intelligence and other suggestions for improvement. [ABSTRACT FROM AUTHOR]