Abstract The Eliassen–Palm flux (EPF) and Plumb’s wave activity (WAF) were computed, using ERA-Interim data, to analyze the influence of planetary 3 on a stratospheric sudden warming event from 17 February 15 March 2005 (SSW05). It was found that 1) SSW05 consisted three stages: prior minor (MnW05), late final (FW05), stagnation between MnW05 FW05; 2) first decreased total upward EPFs by more than 30% at 100 hPa, resulting in stagnation, then increased greater 50%, leading 3) anomalies...

Compound faults are common in wind turbine gearbox due to complex structure and harsh operating condition, which represented by the bearing-gear fault gear-gear <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">etc</i> . It is a challenging task accurately detect multiple from on-site vibration signal potentially contaminated intensive background noise. To address this issue, multi-periodicity induced sparse-fidelity representation model...

Abstract The rapid development of the aviation industry has attracted great attention to safety, and identification early warning low-level wind shear have become crucial. Therefore, it is also necessary improve performance laser radar technology achieve accurate recognition shear. In this regard, study based on uses K-neighborhood frequency method denoise data. And least squares fitting method, two-dimensional synthetic obtained, a low altitude model constructed. These test results confirm...

The detailed chemical investigations of the South China Sea soft corals Sinularia tumulosa and depressa, yielded two new compounds, namely tumulosterol A (1) 11'-hydroxy-α-tocopherylquinone (3), along with four related known ones (2, 5–7). Their structures were determined by extensive spectroscopic analysis comparison spectral data previously reported in literature. In bioassays, compound 1 displayed significant cytotoxic effects against H1975 MDA-MB-231 cells IC50 values 6.0 6.3 µM,...

Abstract. Upwelling branch of the Brewer–Dobson circulation (BDC) controls tropical lower stratospheric water vapor (WV) through dynamic cooling near tropopause. Downwelling BDC dominates extratropical middle-lower Hydrogen Chloride (HCl) by transport. Climatologically, a symmetric weakening indicates increasing WV and decreasing HCl. However, global ozone chemistry related trace gas data records for stratosphere (GOZCARDS) show that lowermost increased 18 % decade−1 during 2001–2011 boreal...

Abstract Characteristics of low-level wind shear in Qinghai Xining Airport are analysed by using pilot reports and reanalysis data. It manifests seasonal diurnal variation that the frequency is higher spring summer, for variation, it afternoon early night. The weather patterns can be roughly divided into four types. Their characteristics also studied this paper. And terrain effect importance to cause shear, gorges mountains lead strong variable direction.

Environment are closely related to energy and they two of the most important issues this century. So development a low-carbon economy construction environment friendly society only way for further China its own. In study, "decoupling" indicators evaluation proposed. "Decoupling" consumption economic growth were selected reflect response relationship between changes resources, including weak, strong expansive/recessive degree decoupling. Similarly, carbon dioxide emissions chosen environment....

The planning and technology used in modern cities are highly correlated with urban carbon emissions. As the concentration of population, logistics, transportation industry, have become main energy consumption. Carbon emissions mainly come from transportation, construction other industries. Recently, artificial intelligence has been gradually mechatronics engineering, where it can comprehensively solve shortcomings traditional engineering. This enables to promote development engineering...

At present, technical standards play an important role in many markets, especially the hi-tech and information technology markets. Technical are not just a simple combination of technologies, which materialize best practices different technologies. Against industrial transformation comparative advantage China, paper, based on practical significance by developing independent standards, puts forward concept further analyzes complex relationship between technological innovation.The results show...

Low-level wind shear is a hazardous phenomenon for aircraft, low-level case of Xining airport selected from pilot reports analysed in this paper. Using ERA-Interim data, the weather pattern and characteristics distribution are discussed. The result indicates cold high pressure accompanied by strong terrain main reason case.

The transfer of human resources refers to the across different regions, industries and organizations depending on development trends in respective areas, economic environment personal needs.It is a process where revenue improves continuously, regional economy, are growing.Reasonable transfers can further realize potential individuals enhance their advantageous position job market.Moreover, optimize resource allocation overall industrial development, improving utilization resources.According...

The lake rate and density of the water network reservoir area generally increased after impoundment reservoir, original forest, farmland, villages were submerged, hydrographic characteristics was gradually changed from rivers to lakes - type. In this context, paper set out ecological risks caused by operation planed risk assessment works, summarized classification factors had preliminary clarify in transfer relationships.