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| 1 | An environmental flow assessment method based on the relationships between flow and ecological response: A case study of the Three Gorges Reservoir and its downstream reach显示文摘The current environmental flow assessment of Chinese rivers is thought to have three shortcomings: The first is that environmental flow requirements of reservoirs in dammed rivers are usually not explicitly considered; the second is that enough attentions have not been paid to the inherent links between flow regime and ecological processes; the third is that most studies focus on the variable range of merely one hydrological element such as discharge needed by riverine ecosystems. Here, first proposed is a holistic method for environmental flow assessment, the flow-ecological response relationship method that is suitable for large rivers with relatively abundant ecological data. Based on the conceptual models and quantitative relationships between flow and ecological response, this method comprehensively considers the ecological conservation requirements of both reservoir and its downstream reach. Then, it is applied to assessing the environmental flows of the Three Gorges Reservoir and its downstream reach by the following steps: 1) Construction of conceptual models of flow-ecological response; 2) identification of ecological targets of environmental flows and their key periods; 3) development of the quantitative relationships between hydrological indicators and ecological indictors; 4) preliminary assessment of environmental flow according to the tradeoff between ecological targets and water demands of human. The environmental flow hydrographs obtained have explicit ecological conservation targets, time schedule of achieving each target, and characteristics of multiple hydrological elements such as flow, water level, frequency, timing, duration and rate of change. The case study has tested the reasonability and feasibility of this method, and the results of this study are expected to provide technical support and decision reference for improving the operation of the Three Gorges-Gezhouba cascade reservoirs. | WANG JunNa DONG ZheRen LIAO WenGen LI Chong FENG ShunXin LUO HuiHuang PENG QiDong | 2013 | Science China(Technological Sciences)2013，56，6： | 16 |
| 2 | A novel kind of sufficient conditions for safety judgement based on control barrier function显示文摘Dear editor,Recently, work safety accidents have started to occur on a large scale in Chinese petrochemical companies. Further,the operational safety of large and complex systems is being closely monitored by our government, environmental organizations,and conscientious citizens. | Zheren ZHU Yi CHAI Zhimin YANG | 2021 | Science China(Information Sciences)2021，64，9： | 3 |
| 3 | A family of continuous conduction mode power factor correction controllers based on the general pulse-width modulator 显示文摘 | Zheren Lai Smedley K M | 1998 | IEEE Trans Power Electronics1998，13，3： | 1 |
| 4 | A family of power-factor-correction controllers显示文摘 | Keyue M Smedly | 1997 | IEEE Transactions on Power Electronics1997，11，5： | 1 |
| 5 | Time Quantity one-Cycle Control for Power Factor Correctors显示文摘 | Smedley K M | 1997 | IEEE Transactions on Power Electronics1997，12，2： | 1 |
| 6 | A family of continuous conduction mode power factor correction controllers based on the general pulse-width modulator显示文摘 | Lai Zheren Smedley K M | 1998 | IEEE Transactions on Power Electronics1998，13，3： | 1 |
| 7 | Time quality one cycle control for power factor correction 显示文摘 | LAI Zheren SMEDLEY K MA Yunhong | 1997 | IEEE Transactions on Power Electronics1997，12，2： | 1 |
| 8 | Time Quantity One-Cycle Control for Power-Factor Correctors显示文摘 | Zheren Lai Keyue M Smedley Yunhong Ma | | 0，，2： | 1 |
| 9 | A family of continuous-conduction-mode power-factor- correction controllers based on the general width modulator 显示文摘 | Zheren Lai Keyue Ma Smedley | 1998 | IEEE Transactions on Election1998，13，3： | 1 |
| 10 | A new extension of one-cycle control and its application to switching power amplifiers显示文摘 | Smedley K M | 1996 | IEEE Trans Power Electronics1996，11，1： | 1 |
| 11 | Time quantity one-cycle control for power-factor correctors显示文摘 | Smedley K M | 1997 | IEEE Transactions on Power Electronics1997，12，2： | 1 |
| 12 | A new PWM controller with one cycle response显示文摘 | Zheren Lai | 1999 | IEEE Transactions on Power Electronics1999，14，1： | 1 |
| 13 | Family of continuous- conduction-mode power-factor-correction controllers based on the general pulse-width modulator显示文摘 | ZHEREN L KEYUE M S | 1998 | IEEE Transaction on Power Electronics1998，13，3： | 1 |
| 14 | A new extension of one-cycle control and its application to swishing power ampli-tiers显示文摘 | Smedley Keyue M | 1996 | IEEE Transactions on Power Electronics1996，11，1： | 1 |
| 15 | A Family of Continuous-Conducting-Mode Power Factor Correction Controllers Based on the General Pulse-Width-Modulator显示文摘 | Zheren Lai | 1998 | PE1998，，3： | 1 |
| 16 | A family of continuous conduction mode power factor correction controllers based on the general pulse width modulator 显示文摘 | LAI Zheren SMEDLEY K M | 1998 | IEEE Trans on Power Electron1998，13，3： | 1 |
| 17 | Time Quantity One-cycle Control for Power-factor Correctors显示文摘 | Zheren Lai Smedley K M Yunhong Ma | 1997 | IEEETrans on Power Electronics1997，，： | 1 |
| 18 | Time Quantity One-cycle Control for Power Factor Correction显示文摘 | Zheren Lai Smedley K M | 1997 | IEEE Transactions on Power Electronics1997，12，2： | 1 |
| 19 | A family of continuous conduction mode power factor correction controllers based on the general pulse-width modulator显示文摘 | Zheren Lai Smedley K M | 1998 | IEEE Transactions on Power Electronics1998，13，3： | 1 |
| 20 | A new PWM controller with one-cycle response显示文摘 | Mark K Smith Zheren Lai | 1999 | IEEE Trans Power Electronics1999，14，1： | 1 |
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