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Technologies of oxygen supply for life support during the development of mineral resources in high altitude areas 被引量:2
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作者 Liu Yingshu Jia Yanxiang +4 位作者 Wu Tianyi Deng Ling Yang Xiong Liu Wenhai Zhang Hui 《Engineering Sciences》 EI 2013年第2期68-75,共8页
In order to fulfill the needs of life-support oxygen supply during the development of plateau mineral resources,four oxygen supply patterns suitable for the plateau mine in specific environment were developed:tunnel f... In order to fulfill the needs of life-support oxygen supply during the development of plateau mineral resources,four oxygen supply patterns suitable for the plateau mine in specific environment were developed:tunnel face diffusive oxygen supply,tunnel oxygen-bar car,carried oxygen cylinder and portable oxygen generator. Through the study of safety oxygen supply experiments in low- pressure plateau areas,the mathematical relationship between maximum integration of secure oxygen volume and altitude has been achieved. Oxygen supply safety control should follow this relationship in plateau mines during the time of executing tunnel face or in room air diffusive oxygen supply. The application results of life-support oxygen supplement technologies in the development of mineral resources in high altitude areas show that the oxygen supply for tunneling miners in plateau mines can not only effectively enhance the oxygen saturation,reduce the pulse rate and the breath rate per minute,but also improve various symptoms caused by altitude hypoxia and high-intensity physical labor. 展开更多
关键词 high altitude areas mineral exploitation life support oxygen supply
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Cultivation of Black Fungus under Forest in Middle-high Altitude Areas
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作者 袁长波 徐延熙 +5 位作者 王艳芹 姚利 付龙云 田叶 李瑞琴 曹德宾 《Agricultural Science & Technology》 CAS 2016年第10期2358-2361,共4页
[Objective] The study was to solve the contradiction between fungus and forest during the production of black fungi, and to obtain relatively high economic benefits and ecological benefits. [Method] Black fungi were c... [Objective] The study was to solve the contradiction between fungus and forest during the production of black fungi, and to obtain relatively high economic benefits and ecological benefits. [Method] Black fungi were cultivated in forest with middle-high altitude of 500-1 600 m. The germination time of fungus stick, germination days of buds, growth days of fruiting body, commodity exterior, marketing effect and biological efficiency of black fungi were investigated. [Result] Compared with traditional cultivation, black fungus products cultivated under forest had the taste and flavor of wild black fungus. Fungus chaff wastage was directly decomposed by the roots in forest land, improving the soil structure of forest land. The need of moisture retention and the frequent access of administrative staff reduced the probability of forest fire occurrence. [Conclusion] Cultivation of black fungus under forest saves more than 70% fixed-asset investment on fungus shed, and the biological efficiency reached 12.2%. 展开更多
关键词 Forest area in middle-high altitude Under forest Black Fungus
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Dynamic Changes of the Bush Encroachment in Low Altitude Area of Ethiopia
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作者 XING Yuanyuan WANG Yongdong +4 位作者 YOU Yuan SONG Qin HARE Malicha Loje JORRO Zinabu Bora JIRMA Guyo Huka 《Journal of Resources and Ecology》 CSCD 2018年第3期281-289,共9页
Bush encroachment is widely distributed in arid and semi-arid regions, and it has a serious impact on livestock production, especially in Africa where livestock is a primary source for the livelihoods of many people. ... Bush encroachment is widely distributed in arid and semi-arid regions, and it has a serious impact on livestock production, especially in Africa where livestock is a primary source for the livelihoods of many people. In this study, methods of supervised classification and decision tree classification, and indexes of a land use change significance index(Ci) and a single land use dynamic degree, were applied to remote sensing imagery of Ethiopia for 1986–2016. The results show the dynamic characteristics of grassland bush encroachment in low altitude areas(pastures 1500 m above sea level) of Ethiopia in the 30 year period studied. The results revealed several interesting features of this phenomenon.(1) The area of bush encroachment showed an increasing trend, with a maximum of 3.74×10^3 km^2 in 2003, which represented 68.97% of the total area, and declined slightly from 2003~2016.(2) Among classification types, the area of severe shrub grassland was the largest, accounting for 28.36–49.10% of the total area, while the area of moderate bush encroachment accounted for 9.77–16.68%, and slight bush encroachment accounted for 5.52–7.57%.(3) The expansion rate of shrubby grassland was 0.74% for the 30 year period, while the average annual expansion rate was 2.16% for the 8 years from 1995–2003.(4) Forest land and grassland were the two main land use types of shrub grassland transformation in low altitude areas and bush encroachment changed large amounts of forest land into grassland due to shrub grassland management. The results of this study provide basic data for revealing the impacts of development processes on subsequent bush encroachment and can inform better management for the sustainable development of grasslands in low altitude systems. 展开更多
关键词 bush encroachment single land use dynamic degree land use change significance index low altitude areas of Ethiopia
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Effective administration of cranial drilling therapy in the treatment of fourth degree temporal,facial and upper limb burns at high altitude:A case report 被引量:2
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作者 Cong-Mo Shen Yi Li +1 位作者 Zhou Liu Yong-Zhang Qi 《World Journal of Clinical Cases》 SCIE 2020年第20期5062-5069,共8页
BACKGROUND Fourth degree burns damage the full thickness of the skin and affect underlying tissues.Skin grafting after debridement is often used to cover the wounds of salvageable severe burns.A granulation wound can ... BACKGROUND Fourth degree burns damage the full thickness of the skin and affect underlying tissues.Skin grafting after debridement is often used to cover the wounds of salvageable severe burns.A granulation wound can be formed by drilling the skull to the barrier layer to solve the problem of skull exposure.Low oxygen levels present at high altitudes aggravate ischemia and hypoxia which can negatively impact wound healing.The impaired healing in such cases can be ameliorated by hyperbaric oxygen therapy.CASE SUMMARY We describe a patient who presented with fourth degree burns to the left temporal and facial regions upon admission in December 2018.The periosteum of the skull and the deep fascia of the face were exposed.After the first stage of debridement and skin grafting,the temporal skin did not survive well.Granulation was induced by cranial drilling,and then a local flap was transferred to cover the wound.The left temporal and facial wounds were completely covered and the patient recovered well.CONCLUSION Skin grafting and flap transfer after early debridement to cover the wound and control infection were of great significance.In the later stages of the patient's treatment,survival of the skin graft and skin flap was observed.The second stage repair was performed to achieve successful skin grafting by cranial granulation.Granulation was formed by drilling the skull,and then the wound was closed,which is suitable for cases with skull exposure and wounds with poor blood supply.We consider that hyperbaric oxygen treatment and improving tissue oxygen supply were beneficial in this patient. 展开更多
关键词 Fourth degree burn Skull exposure Chronic wounds Cranial drilling therapy High altitude area Case report
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Research progress of age-related macular degeneration related gene polymorphism at high altitude
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作者 Xin Yan Ling Li Rui-Juan Guan 《Journal of Hainan Medical University》 2020年第11期67-70,共4页
Age-related macular degeneration(AMD)is a kind of progressive eye disease that seriously damages vision,and it is one of the important causes of blindness.In recent years,a large number of studies have found that ther... Age-related macular degeneration(AMD)is a kind of progressive eye disease that seriously damages vision,and it is one of the important causes of blindness.In recent years,a large number of studies have found that there is a significant correlation between genetic factors and the occurrence and development of AMD.The study of gene polymorphism provides new ideas and directions for clinical diagnosis and treatment.In this paper,we will make a brief review of the research progress related to complement factor H(CFH),serine protease(HtrA1),age-related macular degeneration susceptibility factor 2(ARMS2)and vascular endothelial growth factor(VEGF)gene single nucleotide polymorphisms(SNP). 展开更多
关键词 Age related macular degeneration Gene polymorphism High altitude area Research progress
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An investigation of the influence of ground surface properties and shading on outdoor thermal comfort in a high-altitude residential area 被引量:1
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作者 Lixing Chen Yingzi Zhang +1 位作者 Jiaqin Han Xing Li 《Frontiers of Architectural Research》 CSCD 2021年第2期432-446,共15页
Landscape elements in residential areas can effectively improve the outdoor thermal environment,with different outcomes depending on the climate conditions.This study explores how the ground surface and shading proper... Landscape elements in residential areas can effectively improve the outdoor thermal environment,with different outcomes depending on the climate conditions.This study explores how the ground surface and shading properties affect the outdoor thermal environment in a high-altitude plateau climate where few studies have been conducted.The measurements were conducted during summer and winter in a residential area in Lhasa,Tibet.Without natural shading such as trees,there is a positive correlation between Sky-view factor(SVF)and Physiological equivalent temperature(PET)during winter and a negative correlation during summer.When SVF exceeds 0.65 in summer,it may cause human discomfort.Compared to artificial shading such as a tensioned membrane,deciduous trees are superior at improving human comfort,as they can increase PET by 10.56℃ in winter and decrease it by 9.73℃ in summer.During summer,high-reflection water-permeable bricks can reduce the PET by 1.08℃,and lawns can reduce the mean rachation temperature(Tmrt)by 1.650C;however,the lawns may produce a microclimate with a high air temperature.The results from this paper can be used as a reference for landscape planning and design in residential areas in high-altitude cold-climate regions. 展开更多
关键词 High altitude cold area Residential area SHADING Ground surface properties Outdoor thermal comfort
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