The anisotropic two-dimensional (2D) van der Waals (vdW) layered materials, with both scientific interest and potential application, have one more dimension to tune the properties than isotropic 2D materials. interlayer vdW coupling determines of multi-layer materials by varying stacking orders. As an important representative multilayer rhenium disulfide (ReS2) was expected be random lack coupling. Here, we demonstrate two stable orders (aa a-b) N layer (NL, N>1) ReS2 from...

The hydrogel ionic diode is regarded as a promising self-powered sensor, capable of harvesting energy from low-frequency stimuli human motions and converting it into electrical signals. However, the sensitivity reported conventional bilayer diodes are relatively low, due to single heterojunction interface high resistance, making challenging meet demands high-precision sensing. Here, universal method for fabricating dual-gradient without structure through induction anionic cationic polymer...

A simple treatment of the ZnO cathode interlayer with phenols (both on surface and in blend) for IPSCs.

In association with the development of intermittent renewable energy generation (REG), dynamic multiobjective dispatch faces more challenges for power system operation due to significant REG uncertainty. To tackle problems, a day‐ahead, optimal problem incorporating storage (ES) is formulated and solved based on robust optimization method. proposed model, multistage ES generator patterns are optimized reduce cost emissions. Specifically, strong constraints charging/discharging behaviors in...

The root of Prismatomeris connata has been used in China for centuries as the medicinal herb "Huang Gen" (HG), but its phytochemicals or active ingredients are not well understood. In this study, we performed chemical analysis ethyl acetate fraction a HG ethanol extract. We thus isolated seven new tetrahydroanthraquinones, prisconnatanones C-I (compounds 1-7) from P. and identified their structures using spectroscopic analyses. Their absolute configurations were established by both modified...

L-band differential interferometric SAR satellite constellation, which is also named as Lu Tan-1, has finished its in-orbit test task at the beginning of 2023. The pre-defined parameters project have been all fulfilled. This for first time, Chinese satellites conduct both civil surveying and mapping using InSAR 1:50,000 measurement scale, operational deformation monitoring with DInSAR accuracy better than 5 cm. In this paper, we show application demonstrations including digital orthophoto...

Due to the complex changes in battery state, accurate and fast estimation of state charge (SOC) is still a great challenge. Here, method impedance SOC based on multi-level PI observer proposed. The model reflects change characteristics through dynamic impedance, then system compensation factor added dynamically adjust parameters model. effectiveness algorithm verified by compound stress test (DST) experiment. results show that introduction enables tolerate certain degree fluctuation capacity...

Solid Oxide Electrolysis Cells (SOECs) can electro-reduce carbon dioxide to monoxide, which not only effectively utilizes greenhouse gases, but also converts excess electrical energy into chemical energy. Perovskite-based oxides with exsolved metal nanoparticles are promising cathode materials for direct electrocatalytic reduction of CO2 through SOECs, and have thus received increasing attention. In this work, we doped Pr0.7Ba0.3MnO3−δ at the B site, after treatment, precipitated on surface...

With the continuous development of modern industry, high-precision dynamic monitoring systems are essential to ensure safety and efficiency production. Therefore, terahertz radar system based on frequency modulation wave (FMCW) was studied in this work, aiming at realizing coal levels bunkers. The adopts FMCW method measure target distance by transmitting linear signals using difference time delay between received signal transmitted signal. selection algorithm is combined with phase...

The application of residential photovoltaics (PVs) is useful regarding mitigation environment and eradication energy crisis. However, hosting capacity distribution network (DN) restricted due to voltage problem caused by high proportion PVs. In this paper, the storage systems (ESSs) are used overcome issue rise in peak PV production drop attain load demand. When cross limits, power shortage estimation method based back/forward algorithm calculate shortfall. Then, distributed control on...

With the development and promotion of AC-DC distribution systems, stability multi-terminal systems has drawn much interest. This paper analyzes instability phenomena in by considering interactions between converters. The typical structure control strategy double-terminal under master-slave is introduced. Then an system model developed taking into account interaction converter system. resonant spikes generated converters are used as reference object to analyze influence parameters electrical...

Partition coefficient is a key parameter for counter-current chromatography separation. High-performance liquid (HPLC) the most commonly used tool screening of partition coefficients. However, HPLC technology not applicable to compounds present in same chromatographic peak. Nuclear magnetic resonance (NMR) could easily distinguish according their characteristic absorption even if they exist In this study, two flavonoids peak were successfully purified by with solvent system screened NMR show...

This paper presents the equivalent principle of deadbeat predictive direct power control (DP-DPC) scheme and conventional continuous-control-set model (MP-DPC) single-phase pulse width modulation (PWM) ac-dc converters, respectively, reveals their inherent relationship from view expressions modulated voltage vector in dq rotating frame. The expression index can be derived MP-DPC scheme, which is accordance with result function optimization. On this basis, these CCS schemes same cost...

In the high-power superconducting fusion converter, single-phase neutral point clamped (NPC) three-level converter is applied to replace traditional thyristor using an integrated gate-commutated (IGCT) as a power device. The operating frequency of IGCT usually lower, only few hundred Hz. An optimized hybrid space vector pulsewidth modulation (SVPWM)-8H proposed solve problems discontinuous output average voltage, low dc bus voltage utilization rate, dead time compensation, and potential...

The uncertainty of wind resources is one the main reasons for abandonment. Considering power prediction, a robust optimal dispatching model proposed fire energy storage system with advanced adiabatic compressed air (AA-CAES) technology. Herein, operation constraints plant and reserved capacity are defined according to characteristics AA-CAES. Based on limited scenario method, solution framework achieve robustness economical system, which provides new way application intelligent algorithm in...

This paper presents a systematic structure and control strategy for the electric vehicle charging station. The system uses three-phase three-level neutral point clamped (NPC) rectifier to drive multiple NPC converters provide energy vehicles. topology can realize single-phase AC mode, DC mode by adding some switches meet different requirements. In case of vehicles simultaneously, optimization algorithm is adopted minimize DC-bus current fluctuation analyzing reconstructing in various modes....

To improve the performance and dynamic response ability of poloidal field power supply (PFPS), three-phase PWM converter-cascaded H-bridge inverter structure is adopted in new generation PFPS. However, load PFPS changes violently since characteristic superconducting large inductance, which has a serious impact on stability converter control system. In this article, an improved dual closed-loop strategy based linear active disturbance rejection (ADRC) proposed to suppress influence...