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您的检索式：作者名="Shengzhi Huang"
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| 1 | Copula-based identification of the non-stationarity of the relation between runoff and sediment load显示文摘It is important to identify the non-stationarity in the relation between runoff and sediment load under the backdrop of the changing environment.This relation helps to further understand the mechanisms of runoff and sediment yield.A copula-based method was used to detect possible change points in the relation between runoff and sediment load in the Wei River Basin(WRB),China,where soil erosion is a very severe issue.The modified Mann-Kendall trend test method was applied to obtain the trends of runoff and sediment load spanning 1960-2010 at monthly and annual timescales.Finally,the causes of the identified non-stationarity of the relation between runoff and sediment load were roughly analyzed from the perspective of climate change and human activities.Results indicated that:(1)the runoff and sediment load in the Jinghe and Wei rivers were generally characterized by noticeably decreasing trends at both monthly and annual timescales;(2)both the Jinghe and Wei rivers had a common change point(2002),implying that the stationarity of the relation between runoff and sediment load in the Jinghe and Wei River was invalid;(3)human activities including increasing water consumption and growing application of soil conservation practices are dominant factors resulting in non-stationarity in the relation between runoff and sediment load in the WRB.This study provides a new idea for identifying the non-stationarity of multivariate relation in the hydro-meteorological field under the background of the changing environment. | Shengzhi Huang Pei Li Qiang Huang Guoyong Leng | 2017 | International Journal of Sediment Research2017，32，2： | 5 |
| 2 | Quantitative Estimation on Contributions of Climate Changes and Human Activities to Decreasing Runoff in Weihe River Basin, China显示文摘Human activities and climate changes are deemed to be two primary driving factors influencing the changes of hydrological processes, and quantitatively separating their influences on runoff changes will be of great significance to regional water resources planning and management. In this study, the impact of climate changes and human activities was initially qualitatively distinguished through a coupled water and energy budgets analysis, and then this effect was further separated by means of a quantitative estimation based on hydrological sensitivity analysis. The results show that: 1) precipitation, wind speed, potential evapotranspiration and runoff have a significantly decreasing trend, while temperature has a remarkably increasing tendency in the Weihe River Basin, China; 2) the major driving factor on runoff decrease in the 1970 s and 1990 s in the basin is climate changes compared with that in the baseline 1960 s, while that in the 1980 s and 2000 s is human activities. Compared with the results based on Variable Infiltration Capacity(VIC) model, the contributions calculated in this study have certain reliability. The results are of great significance to local water resources planning and management. | HUANG Shengzhi HUANG Qiang CHEN Yutong | 2015 | Chinese Geographical Science2015，25，5： | 5 |
| 3 | Bismuthene quantum dots integrated D-shaped fiber as saturable absorber for multi-type soliton fiber lasers显示文摘In the present work,the uniformly sized bismuthene quantum dots(BiQDs)with an average diameter of 26 nm were fabricated via the solvothermal approach.By transferring the BiQDs onto the plane of micro-machined D-shaped fiber(DSF),a new type of saturable absorber(SA)was successfully prepared.Based on the evanescent field effect of D-shaped fiber,the prepared SA exhibits excellent saturable absorption properties with the maximum modulation depth of 5.1%at around 1.5μm.To further investigate its potential applications in ultrafast photonics,we demonstrated passive mode-locking operation in the erbium-doped fiber laser(EDFL)with BiQDs/DSF-SA.The conventional soliton pulses with duration of 835 fs at the repetition rate of 9.23 MHz and dissipative soliton pulses with duration of 575 fs at the repetition rate of 7.83 MHz were generated successfully.In addition,stable bound state of solitons with the pulse duration of 1.04 ps and sub-pulse time interval of 15.9 ps were also obtained based on the conventional soliton state by adjusting the pump power and polarization state.Our work reveals the great potential and capacity of BiQDs/DSF-SA in soliton mode-locking operations and promotes the explorative investigation of bismuth-based optoelectronic devices. | Han Pan Hongwei Chu Ying Li Zhongben Pan Jia Zhao Shengzhi Zhao Weichun Huang Dechun Li | 2023 | Journal of Materiomics2023，9，1： | 0 |
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