Flotation characteristics of two different types of ilmenite with sodium oleate     

Zhang Jie  Liu Weijun  Wang Weiqing  Xiong shuqing  Wang dezhi  Yan Wu  Deng Jie 《Mineralogy and Petrology》2015,109(3):299-306

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Climatological analysis of dust storms in the area surrounding the Tengger Desert during 1960–2007     

Qingyu Guan  Jing Yang  Shilei Zhao  Baotian Pan  Chenglin Liu  Di Zhang  Tao Wu 《Climate Dynamics》2015,45(3-4):903-913

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Has the development of FDI and foreign trade contributed to China’s CO2 emissions? An empirical study with provincial panel data     

Yu Hao  Yi-Ming Liu 《Natural Hazards》2015,76(2):1079-1091

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Levels and environmental impact of PAHs and trace element in fly ash from a miscellaneous solid waste by rotary kiln incinerator,China     

Hui Li  Guijian Liu  Yan Cao 《Natural Hazards》2015,76(2):811-822

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Response of soil aggregate disintegration to the different content of organic carbon and its fractions during splash erosion     

Hairu Li  Gang Liu  Ju Gu  Hong Chen  Hongqiang Shi  Mohamed A. M. Abd Elbasit  Feinan Hu 《水文研究》2021,35(2):e14060

Aggregate disintegration is a critical process in soil splash erosion. However, the effect of soil organic carbon (SOC) and its fractions on soil aggregates disintegration is still not clear. In this study, five soils with similar clay contents and different contents of SOC have been used. The effects of slaking and mechanical striking on splash erosion were distinguished by using deionized water and 95% ethanol as raindrops. The simulated rainfall experiments were carried out in four heights (0.5, 1.0, 1.5 and 2.0 m). The result indicated that the soil aggregate stability increased with the increases of SOC and light fraction organic carbon (LFOC). The relative slaking and the mechanical striking index increased with the decreases of SOC and LFOC. The reduction of macroaggregates in eroded soil gradually decreased with the increase of SOC and LFOC, especially in alcohol test. The amount of macroaggregates (>0.25 mm) in deionized water tests were significantly less than that in alcohol tests under the same rainfall heights. The contribution of slaking to splash erosion increased with the decrease of heavy fractions organic carbon. The contribution of mechanical striking was dominant when the rainfall kinetic energy increased to a range of threshold between 9 J m⁻² mm⁻¹ and 12 m⁻² mm⁻¹. This study could provide the scientific basis for deeply understanding the mechanism of soil aggregates disintegration and splash erosion.  相似文献   

Parallelized combined finite-discrete element (FDEM) procedure using multi-GPU with CUDA     

Quansheng Liu  Weiqin Wang  Hao Ma 《国际地质力学数值与分析法杂志》2020,44(2):208-238

This paper focuses on the efficiency of finite discrete element method (FDEM) algorithmic procedures in massive computers and analyzes the time-consuming part of contact detection and interaction computations in the numerical solution. A detailed operable GPU parallel procedure was designed for the element node force calculation, contact detection, and contact interaction with thread allocation and data access based on the CUDA computing. The emphasis is on the parallel optimization of time-consuming contact detection based on load balance and GPU architecture. A CUDA FDEM parallel program was developed with the overall speedup ratio over 53 times after the fracture from the efficiency and fidelity performance test of models of in situ stress, UCS, and BD simulations in Intel i7-7700K CPU and the NVIDIA TITAN Z GPU. The CUDA FDEM parallel computing improves the computational efficiency significantly compared with the CPU-based ones with the same reliability, providing conditions for achieving larger-scale simulations of fracture.  相似文献   

A study on dynamic evaluation of urban integrated natural disaster risk based on vague set and information axiom     

Chaofeng Liu  Xiangjun Zuo 《Natural Hazards》2015,78(3):1501-1516

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Effect of damage evolution of coal on permeability variation and analysis of gas outburst hazard with coal mining     

Yi Xue  Feng Gao  Xingguang Liu 《Natural Hazards》2015,79(2):999-1013

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Psammoma bodies in two types of human ovarian tumours: a mineralogical study     

Meng Fanlu  Wang Changqiu  Li Yan  Lu Anhuai  Mei Fang  Liu Jianying  Du Jingyun  Zhang Yan 《Mineralogy and Petrology》2015,109(3):357-365

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Frequency analysis of nonstationary annual maximum flood series using the time‐varying two‐component mixture distributions          下载免费PDF全文

Lei Yan  Lihua Xiong  Dedi Liu  Tiesong Hu  Chong‐Yu Xu 《水文研究》2017,31(1):69-89

The most popular practice for analysing nonstationarity of flood series is to use a fixed single‐type probability distribution incorporated with the time‐varying moments. However, the type of probability distribution could be both complex because of distinct flood populations and time‐varying under changing environments. To allow the investigation of this complex nature, the time‐varying two‐component mixture distributions (TTMD) method is proposed in this study by considering the time variations of not only the moments of its component distributions but also the weighting coefficients. Having identified the existence of mixed flood populations based on circular statistics, the proposed TTMD was applied to model the annual maximum flood series of two stations in the Weihe River basin, with the model parameters calibrated by the meta‐heuristic maximum likelihood method. The performance of TTMD was evaluated by different diagnostic plots and indexes and compared with stationary single‐type distributions, stationary mixture distributions and time‐varying single‐type distributions. The results highlighted the advantages of TTMD with physically‐based covariates for both stations. Besides, the optimal TTMD models were considered to be capable of settling the issue of nonstationarity and capturing the mixed flood populations satisfactorily. Copyright © 2016 John Wiley & Sons, Ltd.  相似文献