20 hasil untuk "Junjun Deng"
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Artikel Jurnal
An LCC‐S compensated wireless power transfer system using receiver‐side switched‐controlled capacitor combined semi‐active rectifier for constant voltage charging with misalignment tolerance
Abstract The output characteristics of wireless power transfer systems are strongly susceptible to coupling and load variations. To achieve a constant voltage output under varying coupling and load, a voltage regulation method based on a combination of a semi‐active rectifier (SAR) and a…
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Artikel Jurnal
A Diagnosis Method of Semiconductor Power Switch Open-Circuit Fault in the PMSM Drive System With the MPCC Method
The model predictive current control (MPCC) method has been widely used in permanent magnet synchronous motor (PMSM) drive systems for excellent dynamic performance. The fault diagnosis of the PMSM drive system becomes as important as dynamic performance improvement. The open-circuit fault of the…
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Artikel Jurnal
Minimum Copper Loss Direct Torque Control of Brushless DC Motor Drive in Electric and Hybrid Electric Vehicles
A novel direct torque control (DTC) method with copper loss minimization is proposed for the brushless dc motor (BLDCM) in electric vehicle (EV) application. In order to realize high efficiency and high torque control precision at the same time, a special stator flux linkage trajectory is designed…
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Artikel Jurnal
The Start-up Dynamic Analysis and One Cycle Control-PD Control Combined Strategy for Primary-Side Controlled Wireless Power Transfer System
This paper proposes a novel dynamic analysis and a switching converter control strategy for primary-side voltage controlled wireless power transfer (WPT) system. First, the modeling of the high-order double-sided LCC resonant converter is carried out. By dividing the resonant circuit into three…
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Artikel Jurnal
Adaptive CLC-S tuned DWPT system with overlapping coil magnetic coupler for output power fluctuation mitigation
In dynamic wireless power transfer (DWPT) systems employing transmitting (Tx) coil arrays, output power fluctuations aggravate battery charging current ripples and compromise system stability. To address this issue, this work proposes a CLC-S compensation topology based on a dual-input…
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Artikel Jurnal Teks lengkap
The Design and Optimization of Ground-Side Coils for Dynamic Wireless Power Transfer Considering Coupling Variations
Dynamic wireless power transfer (DWPT) has attracted widespread attention for its charging flexibility; short-segmented DWPT systems are more suitable for EV charging scenarios because of their higher charging efficiency and lower electromagnetic radiation, compared to long-track DWPT systems. For…
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Artikel Jurnal
Large-scale empirical study of electric vehicle usage patterns and charging infrastructure needs
Abstract As global electric vehicle (EV) adoption accelerates, granular analysis of empirical usage and charging patterns remains scarce. This study presents a unique large-scale empirical examination of 1.6 million EVs, including a broad array of vehicle types—private, taxi, rental, official, bus…
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Artikel Jurnal
A Novel Design Method of LCC-S Compensated Inductive Power Transfer System Combining Constant Current and Constant Voltage Mode via Frequency Switching
Inductive power transfer (IPT) is an attractive wireless power charging option in many applications such as electric vehicle biomedical devices and consumer electronics, etc. Constant current and constant voltage (CC-CV) charging profile is widely used for charging applications due to affecting the…
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Artikel Jurnal
Chassis Coordinated Control for Full X-by-Wire Vehicles-A Review
Abstract An X-by-wire chassis can improve the kinematic characteristics of human-vehicle closed-loop system and thus active safety especially under emergency scenarios via enabling chassis coordinated control. This paper aims to provide a complete and systematic survey on chassis coordinated…
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Artikel Jurnal
Weakened Sea‐Land Breeze in a Coastal Megacity Driven by Urbanization and Ocean Warming
Abstract The sea‐land breeze (SLB) occurs regularly in coastal areas and influences the local climate and atmospheric environment. Fifteen‐year observations (2005–2019) from urban, coastal, and marine stations were collected to examine the trend in the number of SLB days (SLBD) in Tianjin, a…
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Artikel Jurnal
Design and implementation of interoperable high-efficiency bidirectional wireless power transfer systems for multiple vehicles
The rapid growth of electric vehicle ownership and advancements in vehicle-to-grid (V2G) technologies have created an urgent demand for bidirectional charging–discharging interfaces. Wireless power transfer (WPT) technology, known for its convenience, safety, and flexibility, is a promising…
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Artikel Jurnal
Impact of battery electric vehicle usage on air quality in three Chinese first-tier cities
Abstract China, the world leader in automobile production and sales, confronts the challenge of transportation emissions, which account for roughly 10% of its total carbon emissions. This study, utilizing real-world vehicle data from three major Chinese cities, assesses the impact of Battery…
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Artikel Jurnal
Pivotal role of oxidation processes in rainwater dissolved organic matter: A three-year study
Understanding the composition, sources, and transformation of rainwater dissolved organic matter (DOM) is critical for elucidating surface-atmosphere material transport and associated ecosystem impacts. This three-year (2020–2022) Hangzhou study characterized anthropogenically influenced rainwater…
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Artikel Jurnal
Influence of rainfall on fungal aerobiota in the urban atmosphere over Tianjin, China: A case study
Fungal aerosols, which play significant roles in affecting human health and regional climate, are closely affected by rainfall. But knowledge about the influence of rainfall on fungal aerobiota in the urban atmosphere remains limited. Here, airborne total suspended particles and size-segregated…
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Artikel Jurnal Teks lengkap
China's battery electric vehicles lead the world: achievements in technology system architecture and technological breakthroughs
Developing new energy vehicles has been a worldwide consensus, and developing new energy vehicles characterized by pure electric drive has been China’s national strategy. After more than 20 years of high-quality development of China’s electric vehicles (EVs), a technological R & D layout of “Three…
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Artikel Jurnal
Identification and validation of marker compounds for fine particle emitted from sub-type biomass burning
Abstract Marker components are critical for accurately identifying fine particle (PM2.5) sources. Current marker identification is subjective, and the widely adopted markers to distinguish sub-types of biomass burning (BB) emissions are impossible. Here, PM2.5 samples from the combustion of ten…
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Artikel Jurnal
Decreased Aviation Leads to Increased Ice Crystal Number and a Positive Radiative Effect in Cirrus Clouds
Abstract Travel restrictions in the wake of the COVID‐19 pandemic resulted in an unprecedented decrease of 73% in global flight mileage in April–May 2020 compared to 2019. Here we examine the CALIPSO satellite observations and do not find a significant increase in ice crystal number concentrations…
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Artikel Jurnal
Source forensics of inorganic and organic nitrogen using δ15N for tropospheric aerosols over Mt. Tai
Abstract Nitrogen-containing species are major components in atmospheric aerosols. However, little is known about the sources of N-containing aerosols over high mountainous regions, especially for organic nitrogen (ON). This study aims to reveal the emission sources of both inorganic and organic…
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Artikel Jurnal
Molecular transformation of organic nitrogen in Antarctic penguin guano-affected soil
Organic nitrogen (ON) is an important participant in the Earth’s N cycle. Previous studies have shown that penguin feces add an abundance of nutrients including N to the soil, significantly changing the eco-environment in ice-free areas in Antarctica. To explore the molecular transformation of ON…