A zwitterionic fused-ring based energetic material (ZDPT) was prepared. ZDPT has excellent thermal stability ( T d = 347 °C ) and great detonation velocity D 8390 m s −1 ), which endow with potential as a heat-resistant material.

Single-phase quasi-Z-source rectifiers have second harmonic currents and corresponding ripple voltages on the dc bus.To filer voltage ripple, bulky capacitor bank is needed.This paper proposed an active power filter (APF) for single-phase rectifier.It eliminated with small inductor.This topology suitable to integrated electric vehicle (EV) on-board charger, which can use EV's inverter hardware as its own rectifier hardware.Thus, this save much space weight.Simulation experimental results...

This article presents a new configuration of onboard integrated battery charger for electric vehicles (EVs) using six-phase machine and three-phase ac source. The proposes the utilization symmetrical open-end winding machine, twelve-leg inverter, dc-dc converter. circuit is constructed by connecting directly grid to middle point machine's phase winding, where currents split into equal portions flow in opposite directions, without adding an extra mechanical switch (or relay). From this...

Short-term electricity load forecasting provides a basis for day-ahead energy scheduling. To improve the accuracy of short-term forecasts and deeply explore temporal characteristics sequences, method is proposed to extract predictable components sequences based on secretary bird optimization algorithm (SBOA)-optimized successive variational mode decomposition (SVMD). This decomposes sequence into multiple subsequences under different time series. The combined architecture convolutional...

In recent years, there has been great interest in the development of high-performance heat-resistant energetic materials owing to their widespread applications civilian and national defense technologies. Herein, four materials, i.e., 9H-imidazo[4,5-d][1,2,4]triazolo[4,3-b]pyridazin-6-amine (1), perchlorate (2), 9H-imidazo[4,5-d][1,2,4]triazolo[4,3-b]pyridazine-6,8-diamine (3), (4), were prepared comprehensively studied. Compounds 1–4 having unique [5,6,5] tricyclic fused-ring molecular...

Understanding the mechanisms driving urban heat island (UHI) phenomenon is essential for sustainability. This study investigated spatiotemporal dynamics and underlying factors of surface (SUHI) in Xiamen. Utilizing radiation conduction equation, we calculated intensity (SUHII) summers winters 2003, 2005, 2010, 2015, 2020, followed by spatial distribution analysis. The local climate zone (LCZ) method was employed to assess morphology structure 2010 2020. Urban factors, including built-up...

With the increase of distributed generation penetration, economic operation microgrid has been fully developed. For islanded microgrid, due to lack large grid support and limited capacity (DG), energy supply may not meet need users in real time. Therefore, it is great significance solve problem insufficient power improve economy its operation. Firstly, this paper analyses frequency characteristics DG, establishes models oriented regulation introduces mathematical model DG. Then, an day-ahead...

In recent years, with the increase of distributed generation (DG) penetration rate, economic operation microgrid (MG) has been fully developed, but energy consumption system based on fossil increased contradiction economy, and environment. The process accelerating development utilization renewable are a new focus social concern. This paper first analyzes basic characteristics related policies power demand response (DR) in MG, introduces evaluation index islanded microgrid. Then, established...

Because of the environmental friendliness electric vehicles, research on vehicles has become a hot spot in recent years. How to charge faster is critical widespread use vehicles. Electric vehicle integrated power unit can bidirectional DC-DC converter for driving achieve charging. In order improve density and efficiency system, uses three-phase interleaved parallel technology. This paper proposes method select different phase numbers according output powers working converters. improves under...

Due to the strong coupling characteristics and daily correlation of multiple load sequences, prediction method based on time series extrapolation combined with meteorological data has limited accuracy improvement, which is tested by fluctuation sequences Numerical Weather Prediction (NWP). This paper proposes a considering loads division similar sets. Firstly, multivariate are studied explore interaction relationship between find out priority prediction. Secondly, fluctuating sets divided...

The controlled migration of droplets is great significance in industrial applications and scientific investigation. In this study, a three-dimensional model with level-set method established to simulate the sessile droplet on substrate temperature gradient. moving contact line accomplished by line-to-plane construction Navier slip boundary condition. After validated reliable theoretical results, effect angle, dynamic viscosity ratio, Marangoni number, Prandtl Ohnesorge number studied....

Due to its high efficiency, droplet spray cooling is widely used in various industrial and scientific applications. The spreading of droplets can greatly affect heat transfer, temperature also the dynamics spreading. In this study, both experiment numerical simulations are investigate effects on a hot substrate from nanoscale moving contact lines macroscale thermo-capillary flows. It found that with increasing temperature, during fast spreading, satellite transit first-stage pinch-off...

A modulation for a single-phase quasi-Z-source-integrated electric vehicle charger (qZSC) system is proposed, which can achieve multiple zero-voltage-switching and zero-current-switching (ZCS) transitions without any auxiliary circuit. Though the has couple of hard-switching turn-off transitions, they occur at low current values. The switch quasi-Z-source network also be turned on with ZCS. inductor currents operate in boundary conduction mode or discontinuous to all freewheeling diodes off...

A novel carbon nanotube (CNT) thin film spherical array panel having excellent thermoacoustic performance and characteristics is proposed to generate low intensity focused ultrasound (LIFU) for noninvasive treatment. The has the advantages of easy fabrication, device driving, wide-bandwidth, controllability. theoretical model transducer developed corresponding exact solution sound pressure field obtained. To verify analytical solution, experimental tests are conducted comparison between...

This paper studies an onboard integrated charger for heavy-duty electric vehicles (HDEVs) using three-phase grid and dual open-end winding machine. The already available power electronic components of HDEVs are employed to develop the battery when traction mode is not engaged. High charging with unity factor (UPF) low total harmonic distortion (THD) current introduced in this proposed charger. possibility vehicle (V2G) also analyzed. system does need any hardware reconfiguration between...

Abstract To satisfy the grid operation scheduling requirements for wind power forecasting model accuracy, measured speed near height of turbine hub is added to combined model. First, relationship between numerical weather prediction and at different heights are analysed, correlation each compared. Second, random forest algorithm with cumulative contribution rate used select several meteorological types data as input long short‐term memory network predict speed. Third, while inputting...

Statistical circuit simulation is exhibiting increasing importance for memory circuits under process variation. It challenging to accurately estimate the extremely low failure probability as it becomes a high-dimensional and multi-failure-region problem. In this paper, we develop an Adaptive Clustering Sampling (ACS) method. ACS proceeds iteratively cluster samples adjust sampling distribution, while most existing approaches pre-decide static distribution. By adaptively searching in multiple...