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Search Results: 1 - 10 of 120033 matches for " Panxing Wang "
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The Dynamic Characteristic Experimental Method on the Composite Foundation with Rigid-Flexible Compound Piles  [PDF]
Jihui Ding, Weiyu Wang, Tuo Zhao, Junhui Feng, Panxing Zhang
Open Journal of Civil Engineering (OJCE) , 2013, DOI: 10.4236/ojce.2013.32010

Based on the idea of optimization design of pile type, the composite foundations, which include cememt-flyash-gaavel (for short CFG) long piles and cement-soil (for short CS) short piles, and CS piles with CFG core as well, are formed. The method of the site dynamic characteristic tests of the composite foundations is discussed. The test results show that fireworks bomb may replace demolitions as the vibration resource. Vibration time is about 0.1 sec. Horizontal vibration major frequency is at 22.476 - 56.436 Hz, and vertical vibration major frequency is at 15.538 - 55.884 Hz. The pile arrangements of the composite foundation in the same site have more effect on the acceleration peak value. From the point of vibration, the anti-seismic effect of the CS piles with CFG core is better than others.


Wang Panxing,Liu Dai,Pan Deyu,

大气科学进展 , 1987,
Abstract: The definition Tor stability D of standing waves given in this paper is used to denote the relative magnitude of annual variation of the waves. Analysis of the temporal (seasonal) and spatial (meridional) changes of the monthly mean circulation at 500 and 100 hPa shows its temporal and spatial demarcation and the bourdary be-tween the middle-and-low latitude circulation and the middle-aod-high latitude circulation in the wave field. Based on the annual march of D and the position of the boundary, a discussion is made of the seasonal trans-formation of the Northern- Hemisphere mean circulation and Ihe- pattern of its development.

Zhu Qiangen,He Jinhai,Wang Panxing,

大气科学进展 , 1986,
Abstract: Primarily based on the 1979 FGGE data an analysis is made of the circulation differences between the East-Asian and Indian summer monsoons together with their oscillation features and also the interplay be-tween various monsoon systems originating from the fact that the Asian monsoon area is divided into the East-Asian and Indian regions, of which the former is demarcated into the Nanhai (the South China Sea) and the Mainland subregions.

Wang Panxing,Gao Zhi,Li Changqing,

大气科学进展 , 1987,
Abstract: Based on the oblique mode scheme provided in the Appendix, and analysis is made of the teleconnectional structures (TNS) of the NH 500-hPa height field in January, resulting in a series of teleconnectional patterns re-presentative of the main features of TNS, of which the teleconnectional pattern WPAA (Western Pacific/Asian/ American) closely related to the East-Asian circulation is presented for the first time in this field of research. Contrast analysis indicates that TNS are so sensitive to the transition of seasons that a slight transition would bring about a considerable response. Hence the examination of the month-to-month TNS of the NH atmospher-ic circulations is indispensable.
Comparison of the Hadley cells calculated from two reanalysis data sets
Yujing Qin,Panxing Wang,Zhaoyong Guan,Yang Yue
Chinese Science Bulletin , 2006, DOI: 10.1007/s11434-006-2030-3
Abstract: The mass stream function of mean meridional circulation is calculated from the ECMWF and NCEP/NCAR reanalysis data sets using a superposition computation scheme. The comparison of results shows that the common ascending leg of the Hadley cell calculated from the ECMWF data is strong and narrow, and averagely lies more north of the equator in comparison with its counterpart from the NCEP/NCAR data, and furthermore the Hadley cell from the ECMWF data shows an obvious double-layer structure. Therefore, there are obvious differences between Hadley cells displayed by the two objective analysis data sets.
Definition and analysis of the circulation indices of polar vortex at 10 hPa in the Northern Hemisphere

LiPing Li,ShuXuan Guan,PanXing Wang,JuHui Ma,

寒旱区科学 , 2009,
An Effective Configuration of Ensemble Size and Horizontal Resolution for the NCEP GEFS

MA Juhui,Yuejian ZHU,Richard WOBUS,Panxing WANG,

大气科学进展 , 2012,
Abstract: Two important questions are addressed in this paper using the Global Ensemble Forecast System (GEFS) from the National Centers for Environmental Prediction (NCEP): (1) How many ensemble members are needed to better represent forecast uncertainties with limited computational resources? (2) What is the relative impact on forecast skill of increasing model resolution and ensemble size? Two-month experiments at T126L28 resolution were used to test the impact of varying the ensemble size from 5 to 80 members at the 500-hPa geopotential height. Results indicate that increasing the ensemble size leads to significant improvements in the performance for all forecast ranges when measured by probabilistic metrics, but these improvements are not significant beyond 20 members for long forecast ranges when measured by deterministic metrics. An ensemble of 20 to 30 members is the most effective configuration of ensemble sizes by quantifying the tradeoff between ensemble performance and the cost of computational resources. Two representative configurations of the GEFS---the T126L28 model with 70 members and the T190L28 model with 20 members, which have equivalent computing costs---were compared. Results confirm that, for the NCEP GEFS, increasing the model resolution is more (less) beneficial than increasing the ensemble size for a short (long) forecast range.
Circulation Indices of the Aleutian Low Pressure System: Definitions and Relationships to Climate Anomalies in the Northern Hemisphere

WANG Panxing,Julian X L WANG,ZHI Hai,WANG Yukun,SUN Xiaojuan,

大气科学进展 , 2012,
Abstract: In this study, a group of indices were defined regarding intensity (P), area (S) and central position (λ c, ? c) of the Aleutian low (AL) in the Northern Hemisphere in winter, using seasonal and monthly mean height field at 1000-hPa. These indices were calculated over 60 winter seasons from 1948/1949 to 2007/2008 using reanalysis data. Climatic and anomalous characteristics of the AL were analyzed based on these indices and relationships between the AL, and general circulations were explored using correlations between indicesP, λ c, and Pacific SST, as well as Northern Hemisphere temperature and precipitation. The main results are these: (1) AL is the strongest in January, when the center shifts to the south and west of its climatological position, and it is the weakest in December when the center shifts to the north and east. (2) AL intensity (P) is negatively correlated with its longitude (λ c): a deeper low occurs toward the east and a shallower low occurs toward the west. On a decadal scale, the AL has been persistently strong and has shifted eastward since the 1970s, but reversal signs have been observed in recent years. (3) The AL is stronger and is located toward the east during strong El Ni?o winters and vice versa during strong La Ni?a years; this tendency is particularly evident after 1975. The AL is also strongly correlated with SST in the North Pacific. It intensifies and moves eastward with negative SST anomalies, and it weakens and moves westward with positive SST anomalies. (4) Maps of significance correlation between AL intensity and Northern Hemisphere temperature and rainfall resemble the PNA teleconnection pattern in mid-latitudes in the North Pacific and across North America. The AL and the Mongolian High are two permanent atmospheric pressure systems adjacent to each other during boreal winter over the middle and high latitudes in the Northern Hemisphere, but their relationships with the El Ni?o/La Ni?a events and with temperature and precipitation in the Northern Hemisphere are significantly different.
Ensemble-Based Estimation of Observation Impact-Simplified AGCM Perfect Experiments

WANG Qin,WANG Panxing,LI Hong,

大气科学 , 2010,
Potential Predictability of Sea Surface Temperature in a Coupled Ocean--Atmosphere GCM

YAN Li,WANG Panxing,YU Yongqiang,LI Lijuan,WANG Bin,

大气科学进展 , 2010,
Abstract: Using the Flexible Global Ocean--Atmosphere--Land System model (FGOALS) version g1.11, a group of seasonal hindcasting experiments were carried out. In order to investigate the potential predictability of sea surface temperature (SST), singular value decomposition (SVD) analyses were applied to extract dominant coupled modes between observed and predicated SST from the hindcasting experiments in this study. The fields discussed are sea surface temperature anomalies over the tropical Pacific basin (20oS--20oN, 120oE--80oW), respectively starting in four seasons from 1982 to 2005. On the basis of SVD analysis, the simulated pattern was replaced with the corresponding observed pattern to reconstruct SST anomaly fields to improve the ability of the simulation. The predictive skill, anomaly correlation coefficients (ACC), after systematic error correction using the first five modes was regarded as potential predictability. Results showed that: 1) the statistical postprocessing approach was effective for systematic error correction; 2) model error sources mainly arose from mode 2 extracted from the SVD analysis---that is, during the transition phase of ENSO, the model encountered the spring predictability barrier; and 3) potential predictability (upper limits of predictability) could be high over most of the tropical Pacific basin, including the tropical western Pacific and an extra 10-degrees region of the mid and eastern Pacific.
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