Zeming Gao

Optimization and backpressure mechanisms of a ramjet flowpath in an over/under turbine-based combined cycle inlet

Sheng Zhang, Haifeng Yue, Zeming Gao, Zhouhong Wang et autres

Two-dimensional variable-geometry inlets are key to wide-envelope operation of over/under turbine-based combined-cycle engines, but their ramjet flowpaths must balance aerodynamic compression, installation constraints, and flow regulation during mode transition. For a single fixed ramjet-flowpath geometry operating over Ma∞=3.5–7.0, an aerodynamic-prior-guided gated deep …

cn (code pays fourni par la source)

Identification and suppression methodology for wideband oscillations in LCC-MMC in UHVDC transmission system

Lun Cheng, Jingyuan Dong, Ding Liu, Weihua Zuo et autres

Abstract The Hebei Province Ultra-High-Voltage-Direct Current transmission system is one of China’s first cross-provincial transmission channels designed to support large-scale wind and photovoltaic power bases in desert, Gobi, and barren regions. However, the system faces stability challenges due to wideband oscillations caused …

cn, us (code pays fourni par la source)

Transition planning and control methods for a tilt-wing VTOL UAV: From hardware design to flight validation

Haifeng Yue, Zeming Gao, Penghui Liu, Zhouhong Wang et autres

cn (code pays fourni par la source)

PlanU: Large Language Model Reasoning through Planning under Uncertainty

C. Liang, Zeming Gao, Chao Ma, C. X. Lin et autres

Large Language Models (LLMs) are increasingly being explored across a range of reasoning tasks. However, LLMs sometimes struggle with reasoning tasks under uncertainty that are relatively easy for humans, such as planning actions in stochastic environments. The adoption of LLMs for reasoning …

Model-Driven Active Disturbance Rejection Control - Analysis and Application to Wet Desulfurization Process of Power Plant

Hongbin Zhang, Jiheng Zhang, Yuan Yao, Xiangguo Wei et autres

Addressing the issue of poor regulation performance of conventional PID control in wet flue gas desulfurization (WFGD) systems due to large inertia and large time-delay, this paper proposes a model-driven active disturbance rejection control (MADRC) strategy. Firstly, based on the stable second-order …

Meshless simulation of multi-propeller/wing interactions in typical distributed electric propulsion configurations

Zeming Gao, Xueming Shao, Dingyi Pan, Lifang Zeng et autres

Aerodynamic characteristics study on multiple propellers in distributed electric propulsion configurations

Zeming Gao, Sheng Zhang, Xueming Shao, Lifang Zeng

Distributed electric propulsion is widely recognized as a disruptive technology in aviation, and the aerodynamic characteristics of a multi-propeller are critical to the design of such configurations. A reformulated vortex particle method is adopted to provide an in-depth analysis of the aerodynamic …

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TADG: A Probabilistic Graph Model for DDoS Data Augmentation

Jingmei Hu, Ye Tian, Gongli Xi, Zeming Gao et autres

cn (code pays fourni par la source)

Aerodynamic interaction mechanisms in typical wingtip-mounted tractor propeller configurations

Zeming Gao, Haifeng Yue, Xueming Shao, Sheng Zhang et autres

The wingtip-mounted tractor propeller configuration has been extensively studied due to its great potential for improving wing aerodynamic performance. In the present work, the aerodynamic interaction mechanisms in typical wingtip-mounted tractor propeller configurations are analyzed in depth using the reformulated vortex particle …

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Black Start Scheme for Grid-Forming Doubly Fed Wind Turbines with Improved Virtual Synchronous Control Based on Virtual Stator Electromotive Force

Wanqing Yang, Tengkai Yu, Jifeng Liang, Guanghui Sun et autres

After a power outage in the grid with a high proportion of new energy access, the black start is required to restore the power supply quickly. However, in the early stage of black start, the strength of the power system is weak, …

cn (code pays fourni par la source)

Optimal Power Flow Calculation Based on Improved Crossover Algorithm

Xiaodong Yang, Lun Cheng, Zeming Gao

Abstract Aiming at the optimization problem of power flow distribution in power system, this paper puts forward a method for calculating the optimal power flow of power network based on the improved crisscross algorithm. The fast convergence crisscross optimization algorithm (FCSO) is …

Reactive Load Pre-measurement for Large Industrial Users Based on Improved GBDT Regression Algorithm

Zeming Gao, Lun Cheng, Xiaodong Yang

Abstract With the development of intelligence and marketization of power system, reactive load prediction is the key technology applied to the intelligent technical means of power grid. For large industrial users, the management of reactive power is one of the key factors …