814 research outputs found
Distenia stenola Chiang & Wu 1987
No full textDistenia stenola Chiang & Wu, 1987: 21, figs. 10–11 (Figs. 5a, b) Type locality: China, Yunnan, Yongping County, Changjie. Gender: male. Altitude: 2600m. Date collected: 1980.VII.20. Collector: Yongping expedition team.Published as part of Li, Zhu & Chen, Li, 2020, Primary types of longhorned beetles (Coleoptera, Cerambycidae, Vesperidae and Disteniidae) of Southwest University (SWU), pp. 25-46 in Zootaxa 4718 (1) on page 26, DOI: 10.11646/zootaxa.4718.1.2, http://zenodo.org/record/360220
Annual performance of a solar aided coal-fired power generation system (SACPG) with various solar field areas and thermal energy storage capacity
No full textAbstract not availableJunjie Wu, Hongjuan Hou, Yongping Yang, Eric H
Performance of a solar aided power plant in fuel saving mode
No full textAbstract not availableHongjuan Hou, Junjie Wu, Yongping Yang, Eric Hu, Si Che
Investigating future precipitation changes over China through a high-resolution regional climate model ensemble
No full textDue to climate change, rising temperature around the world will have a great potential to influence the global hydrologic cycle, thus leading to substantial changes in the spatial and temporal patterns of precipitation. In this study, the effects of global warming on the regional hydrologic cycle, particularly on the spatiotemporal patterns of precipitation, over China are investigated through a high-resolution regional climate ensemble. In detail, the PRECIS regional climate modeling system is employed to simulate the regional climate over China from 1950 to 2099 with a fine resolution of 25 km, driven by the boundary conditions from a four-member HadCM3-based perturbed-physics ensemble (i.e., HadCM3Q0, Q1, Q7, and Q13) and the ECHAM5 model. Historical simulations of the PRECIS ensemble are first compared to the observations to validate its performance in capturing both the spatial and temporal patterns of precipitation. The comparisons show that the PRECIS ensemble is likely to overestimate precipitation in the south and exhibits slight dry biases in the northwest and southeast coasts of China. The projections from the PRECIS ensemble for future periods (i.e., 2020s, 2050s, and 2080s) are then analyzed to help understand how the regional characteristics of precipitation will be affected in the context of global warming. It is shown that the annual mean precipitation over China is likely to increase throughout the 21st century (i.e., by 0.078 mm/d in 2020s, 0.218 mm/d in 2050s, and 0.360 mm/d in 2080s). This may suggest that the rising temperature due to climate change will intensify the regional hydrologic cycles in China. However, apparent spatial and temporal variations are also reported in the projected precipitations from the PRECIS ensemble. For example, bigger changes in precipitation are usually observed in summer; projected precipitation changes in the southeast are apparently higher than other regions. In addition, the results show that the fluctuation range of the ensemble simulations will increase with time periods from 2020s to 2080s, indicating that the longer the projecting periods, the more uncertain the projections will be
Performance improvement of coal-fired power generation system integrating solar to preheat feedwater and reheated steam
No full textSolar aided power generation (SAPG) technology has been proven as an efficient way to use solar energy for power generation purpose. In a SAPG plant, a solar field consisting of parabolic solar collectors is normally used to supply the solar heat to preheat feedwater and replace the high-pressure extraction steam. However, the outlet temperature of reheated steam decreased with the integration of solar thermal which sacrificed the system performance. As an improvement, the second solar field was proposed to preheat the reheated steam to maintain its outlet temperature and the average temperature of regenerative Rankine cycle before or after solar integration. Through a case study using A 600MW supercritical SAPG plant operating in fuel-saving Using solar to preheat feedwater and reheated steam could improve overall cycle efficiency and solar-to-electricity efficiency by 1.91% and 6.01%, respectively. The solar share was expanded from 9.53% to 17.26%. The electricity generated per solar aperture area under the design condition was 187.96 W/m², which was 26.91% higher than that of the system without the second solar field.Junjie Wu, Hongjuan Hou, Eric Hu, Yongping Yan
The role of exposure on the vertical variation of mudflat sediment erodibility
No full textVariations in meteorological conditions are known to influence the erodibility of sediments on tidal flats. However, there is limited understanding of how evaporation during exposure affects the stability of mudflats. In this study, we conducted field tests spanning 5 days in January 2021 and 14 days in August 2022 in the intertidal zone along the Yancheng coast in Jiangsu Province, China. We selected critical shear stress for erosion (τ
cr) and shear strength (SS) as erosion parameters, and analyzed the variations in hydrodynamic and meteorological parameters, and vertical sediment properties. Our results indicate that bed exposure in summer significantly enhances sediment stability, an effect that extends below the surface layer and even to deeper layers. As exposure duration increases, the differences with depth become more pronounced, leading to increased variability in τ
cr. This vertical gradient increases with exposure duration and atmospheric evaporation intensity, with both the values of vertical τ
cr and SS in summer showing a nearly 2 times increase compared to that in winter. The primary controlling parameter for changes in sediment erodibility during summer exposure is water content, while in winter, the mean grain size (D50) and salinity are more significant. The causal relationship between summer and winter exposure and resistance to vertical erosion of mudflats, shown in this study, underscores the need to pay greater attention to the seasonal influence of atmospheric processes on the spatial heterogeneity of sediments that arises from tidal exposure.</p
Air Quality Evaluation on I-210 Freeway Before-and-After Safer-at-Home Order During COVID-19 Pandemic-Continuation
No full textAs California became the first state in the nation to issue the Safer-at-Home order in March 19th 2020 as the mitigation measures to slow the spread of the novel COVID-19 virus, the traffic volumes in urban Los Angeles area has been plummeted rapidly to a number that has not been seen for decades. As passenger vehicles volumes remained constantly lower throughout the entire Safer-at-Home order, truck volumes had noticeably increased after the order had been issued. Using the same traffic parameters (passenger car flow, speed, and truck flow) and air pollutants data (carbon dioxide, carbon monoxide, nitrogen monoxide, nitrogen dioxide, ground-level ozone, and particulate matter that were collected in a section of the I-210 freeway in Los Angeles County, the correlation among the traffic parameters especially truck volumes and air pollutants were evaluated for a longer period of 2 months ( 4/2020- 6/2020) to examine whether the increase of truck volumes changed the correlations concluded in the prior study. These data were analyzed using similar analytical methods such as time plots, box plots, and correlation analysis. This paper is specifically evaluating the previous founding of the correlations among traffic parameters and traffic pollutants to future research purposes
L\u27Asie Disjoncté Enfin! Asia finally unhinged!
No full textThis brief report, in French, introduced several Chinese Contemporary Artists in 1995, which includes Gu Wenda, Wu Shanzhuan, Huang Yongping, and Zhan Wang. Specifically, this report covers Zhan Wang\u27s work, 94 Ruins Cleaning Plan . For further details, please refer to https://digital.kenyon.edu/zhou/520/. (Zhuocheng Jiang \u2726)https://digital.kenyon.edu/zhoudocs/1429/thumbnail.jp
Chinese Herbal Formulas Si-Wu-Tang and Er-Miao-San Synergistically Ameliorated Hyperuricemia and Renal Impairment in Rats Induced by Adenine and Potassium Oxonate
No full textBackground/Aims: Hyperuricemia is an independent risk factor for chronic kidney disease and cardiovascular disease. Here, we examined the combined protective effects of Chinese herbal formula Si-Wu-Tang and Er-Miao-San on hyperuricemia and renal impairment in rats. Methods: Rats were randomly divided into normal rats, hyperuricemic rats, and hyperuricemic rats orally administrated with benzbromarone (4.5 mg·kg-1·d-1), Si-Wu-Tang (3.78 g·kg-1·d-1) and Si-Wu-Tang plus Er-Miao-San (6.48 g·kg-1·d-1) for 4 weeks. Hyperuricemic rats were orally gavaged with adenine (0.1 g·kg-1·d-1) and potassium oxonate (1.5 g·kg-1·d-1) daily for 4 weeks. Serum uric acid, creatinine, total cholesterol (TCH), triglyceride and blood urea nitrogen (BUN) concentrations, as well as urinary uric acid and microalbuminuria were measured weekly. Serum xanthine oxidase (XOD) activity and renal histopathology were also evaluated. The renal expression of organic anion transporter 1 (OAT1) and organic anion transporter 3 (OAT3) was detected by western blot. Results: Si-Wu-Tang plus Er-Miao-San lowered serum uric acid, creatinine, triglyceride and BUN levels to a greater degree than did Si-Wu-Tang alone. Si-Wu-Tang plus Er-Miao-San ameliorated microalbuminuria and renal histopathology, as well as decreased serum TCH concentration and XOD activity in hyperuricemic rats. Combination of Si-Wu-Tang and Er-Miao-San also led to a greater increase in OAT1 and OAT3 expression than did Siwutang alone. Conclusion: Si-Wu-Tang and Er-Miao-San synergistically ameliorated hyperuricemia and renal impairment in rats through upregulation of OAT1 and OAT3
Outdoor activities in gated communities
No full textThe development of gated communities in Chinese cities has been studied by several researchers such as Pow Choon-Piew ((POW, C.-P. (2009). Gated communities in China: class, privilege and the moral politics of the good life. Abingdon and New York: Routledge)). In a recent article, Wu, Wei and Wang chose to focus on the use of outdoor open space in these communities, choosing a gated community in Xiamen for their case study ((WU Caiwei, WEI Yongping, and Mark Y. WANG (2014). Planned gated comm..
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