5篇
您的检索式：作者名="SHENG Zhuping"
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| 1 | Impact of time lags on diurnal estimates of canopy transpiration and canopy conductance from sap-flow measurements of Populus cathayana in the Qinghai–Tibetan Plateau显示文摘Recently, canopy transpiration(Ec) has been often estimated by xylem sap-flow measurements. However, there is a significant time lag between sap flow measured at the base of the stem and canopy transpiration due to the capacitive exchange between the transpiration stream and stem water storage. Significant errors will be introduced in canopy conductance(gc) and canopy transpiration estimation if the time lag is neglected. In this study, a cross-correlation analysis was used to quantify the time lag, and the sap flowbased transpiration was measured to parameterize Jarvistype models of gcand thus to simulate Ecof Populus cathayana using the Penman–Monteith equation. The results indicate that solar radiation(Rs) and vapor pressure deficit(VPD) are not fully coincident with sap flow and have an obvious lag effect; the sap flow lags behind Rsand precedes VPD, and there is a 1-h time shift between Ecand sap flow in the 30-min interval data set. A parameterized Jarvis-type gc model is suitable to predict P. cathayana transpiration and explains more than 80% of the variation observed in gc, and the relative error was less than 25%, which shows a preferable simulation effect. The root mean square error(RMSEs)between the predicted and measured Ecwere 1.91 9 10-3(with the time lag) and 3.12 9 10-3cm h-1(without the time lag). More importantly, Ecsimulation precision that incorporates time lag is improved by 6% compared to the results without the time lag, with the mean relative error(MRE) of only 8.32% and the mean absolute error(MAE) of1.48 9 10-3cm h-1. | Hui Wang Kangning He Runjie Li Zhuping Sheng Yun Tian Jun Wen Bo Chang | 2017 | Journal of Forestry Research2017，28，3： | 3 |
| 2 | An aquifer storage and recovery system with reclaimed wastewater to preserve native groundwater resources in E1 Paso,Texas显示文摘 | Zhuping Sheng | 2005 | Journal of Environmental Management2005，75，： | 1 |
| 3 | Optimal injection attack strategy for cyber-physical systems:a dynamic feedback approach显示文摘This paper investigates the system security problem of cyber-physical systems(CPSs),which is not only more practical but also more signi cant to deal with than the detecting faults problem.The purpose of this paper is to nd an optimal attack strategy that maximizes the output error of the attacked system with low energy consumption.Based on a general model of linear time-invariant systems and a key technical lemma,a new optimal attack strategy for the meticulously designed false data injection attack is constructed.It is worth mentioning that compared with the existing model-based attack strategies,the designed one is more general and the corresponding attack strategy is more easily implemented when system states and external input are inaccessible.Key to overcoming the inaccessible information,a dynamic observer in the form of Luenberger is constructed.Finally,a networked magnetic levitation steel ball movement system is applied to illustrate the e ectiveness of the proposed scheme. | Sheng Gao Hao Zhang Zhuping Wang Chao Huang | 2022 | Security and Safety2022，1，1： | 1 |
| 4 | Mechanisms of earth fissuring caused by groundwater withdrawal 显示文摘 | SHENG Zhuping Helm D C Li Jiang | 2003 | Environ and Eng''g Geoscience2003，9，4： | 1 |
| 5 | Optimal Injection Attack for UCPS Under Vertical Depth-Keeping Task Via Game Approach显示文摘Dear Editor, This letter concerns about the security problem of underwater cyber-physical system(UCPS) for depth-keeping task in the vertical plane. A dynamic parametric model of the UCPS with ocean currents and hydrostatic is considered. With the intelligence of the controller, the objective function of a zero-sum game between the attacker and the controller is introduced. The attacker destroys the depth-keeping task of UCPS by injecting the designed false data into the system. | Sheng Gao Hao Zhang Zhuping Wang Chao Huang Huaicheng Yan | 2023 | IEEE/CAA Journal of Automatica Sinica2023，10，1： | 0 |
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