Optimization study on installation angle optimization of vacuum tube collector in high altitude towns in Western Sichuan

2021 ◽  
Author(s):  
Hang Zou ◽  
Xin Liu ◽  
Jing Zhou ◽  
Enshen Long ◽  
Zhanqiang Liu
Keyword(s):  
High Altitude ◽  
Vacuum Tube ◽  
Western Sichuan ◽  
Installation Angle ◽  
Optimization Study

Genetic characterization of rhesus macaque populations along the southeastern Qinghai-Tibetan plateau based on a mitochondrial ATP6 gene closely related to energy metabolism

2020 ◽  
Author(s):  
Pu Zhao ◽  
Kechu Zhang ◽  
Zuxiang Jin ◽  
Diyan Li ◽  
Meng Xie ◽  
...  
Keyword(s):  
Energy Metabolism ◽  
Genetic Differentiation ◽  
High Altitude ◽  
Rhesus Macaque ◽  
River Basin ◽  
Adaptive Evolution ◽  
Population Genetic ◽  
Rhesus Macaques ◽  
Western Sichuan ◽  
Atp6 Gene

Abstract Background Rhesus macaque ( Macaca mulatta ) is widely distributed in China, across different altitudes. The mitochondrial ATP6 gene,an ATPase subunit coding gene with fast evolution rate in the mitochondrial genome, plays an important role in the energy metabolism of animals, which may be a good molecular marker for studying the adaptive evolution of animals. Herein, we detected ATP6 genes of 334 rhesus macaques of 19 populations from multiple regions in China with an elevation span of 5-4000m, and mainly carried out the population genetic and evolutionary analysis in these macaques. Our aim is to explore the molecular mechanism of rhesus macaques in adapting to different environments, especially in high altitude extreme environments. Results A total of 50 haplotypes were identified, and significant differences were found in haplotype sequences of rhesus macaque ATP6 gene at different elevations, especially in the high altitude haplotypes with multiple specific variation sites, leading to some region-specific haplotypes. Population genetic analysis showed that rhesus macaque had high genetic diversity ( Pi =0.02332 ± 0.00226, Hd =0.802 ± 0.022 and K =14.982), and there was obvious genetic differentiation among different geographical populations. Conclusions The results showed that the ATP6 gene had undergone adaptive evolution in the process of rhesus macaque adapting to different elevations, especially the high altitude environments. We also found that geographical isolation was an important factor in the genetic differentiation of rhesus macaque. Phylogenetic analysis showed that there were two subspecies of rhesus macaque in western Sichuan, namely, M. m. lasiotus and M. m. vestita , the former distributed in the western Sichuan region of the Yalong River Basin and the Qinghai-Tibet Plateau, while the latter distributed in the Dadu River Basin and northwest Sichuan. We speculated that the Daxueshan Mountains in western Sichuan was a critical geographical barrier for the differentiation of the two subspecies populations.

Recent decline of high altitude coniferous growth due to thermo-hydraulic constrains: evidence from the Miyaluo Forest Reserve, Western Sichuan Plateau of China

2020 ◽  
Vol 63 ◽  
pp. 125751
Author(s):  
Maierdang Keyimu ◽  
Zongshan Li ◽  
Xiuchen Wu ◽  
Bojie Fu ◽  
Guohua Liu ◽  
...  
Keyword(s):  
High Altitude ◽  
Forest Reserve ◽  
Western Sichuan

scholarly journals Installation Optimization on the Tilt and Azimuth Angles of the Solar Heating Collectors for High Altitude Towns in Western Sichuan

2017 ◽  
Vol 205 ◽  
pp. 2995-3002 ◽  
Author(s):  
Zhenghao Jin ◽  
Kuo Xu ◽  
Yin Zhang ◽  
Xuefei Xiao ◽  
Jing Zhou ◽  
...  
Keyword(s):  
High Altitude ◽  
Solar Heating ◽  
Western Sichuan

scholarly journals Evaluating the Highway Tunnel Construction in Western Sichuan Plateau Considering Vocational Health and Environment

2019 ◽  
Vol 16 (23) ◽  
pp. 4671 ◽  
Author(s):  
Peng Wu ◽  
Feng Yang ◽  
Jinlong Zheng ◽  
Yanqing Wei
Keyword(s):  
High Altitude ◽  
Oxygen Supply ◽  
Evaluation Method ◽  
Meteorological Data ◽  
Oxygen Deficiency ◽  
Tunnel Construction ◽  
Western Sichuan ◽  
Highway Tunnel ◽  
Freezing Depth ◽  
Current Design

Oxygen deficiency and coldness are the main challenges for highway tunnel construction in high-altitude areas such as western Sichuan plateau. The artificial oxygen supply and anti-freezing structure in the tunnel construction process has a significant impact on vocational health and the environment. Thus, the conditions of tunnels need to be carefully evaluated before construction. However, the current design code for tunnel construction contains few instructions about these aspects. This paper attempts to establish a simple evaluation method to guide the construction design by analyzing the oxygen partial pressure of trachea, the mean temperature of the coldest month, and the maximum freezing depth for tunnel projects in western Sichuan plateau. Based on the on-site meteorological monitoring at different altitudes of three typical tunnels in the western Sichuan plateau and the comparative analysis of the existing meteorological data, the corresponding relationships between the three parameters and the altitude were investigated. The thresholds by altitude for grading the tunnels are identified as 2100 m and 4200 m, respectively. The highway tunnels in the western Sichuan plateau are graded in three categories, namely, general-altitude tunnels, high-altitude tunnels, and ultra-high-altitude tunnels. The corresponding measures of oxygen supply and freezing prevention for different graded tunnels are recommended. The results would provide a basis for the design and construction of new tunnels and enhance the service life and operations safety of the tunnels in western Sichuan plateau and other similar high-altitude areas.

Contrast of Filament Bright Rims

1994 ◽  
Vol 144 ◽  
pp. 365-367
Author(s):  
E. V. Kononovich ◽  
O. B. Smirnova ◽  
P. Heinzel ◽  
P. Kotrč
Keyword(s):  
High Altitude ◽  
Line Profile ◽  
Line Center ◽  
Magnetic Structures ◽  
The Mean

AbstractThe Hα filtergrams obtained at Tjan-Shan High Altitude Observatory near Alma-Ata (Moscow University Station) were measured in order to specify the bright rims contrast at different points along the line profile (0.0; ± 0.25; ± 0.5; ± 0.75 and ± 1.0 Å). The mean contrast value in the line center is about 25 percent. The bright rims interpretation as the bases of magnetic structures supporting the filaments is suggested.

Clean Electron Microscope Substrate Films Used for Micrometeorite Collection and Study

1967 ◽  
Vol 25 ◽  
pp. 366-367
Author(s):  
D. M. Davies ◽  
R. Kemner ◽  
E. F. Fullam
Keyword(s):  
Thin Film ◽  
Electron Microscope ◽  
High Altitude ◽  
Amyl Acetate ◽  
Temperature Variations ◽  
Film Forming ◽  
Film Specimen ◽  
Particulate Contaminants

All serious electron microscopists at one time or another have been concerned with the cleanliness and freedom from artifacts of thin film specimen support substrates. This is particularly important where there are relatively few particles of a sample to be found for study, as in the case of micrometeorite collections. For the deposition of such celestial garbage through the use of balloons, rockets, and aircraft, the thin film substrates must have not only all the attributes necessary for use in the electron microscope, but also be able to withstand rather wide temperature variations at high altitude, vibration and shock inherent in the collection vehicle's operation and occasionally an unscheduled violent landing.Nitrocellulose has been selected as a film forming material that meets these requirements yet lends itself to a relatively simple clean-up procedure to remove particulate contaminants. A 1% nitrocellulose solution is prepared by dissolving “Parlodion” in redistilled amyl acetate from which all moisture has been removed.

Dynamic electrocardiography at high altitude

1966 ◽  
Vol 118 (2) ◽  
pp. 132-138 ◽  
Author(s):  
J. S. Sanders
Keyword(s):  
High Altitude
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