bluuebunny/crossref_metadata_2025_split huggingface dataset:
A comprehensive evaluation method for economic collaborative planning evaluation of main distribution network based on rough set and scale extension method
Authors: Zhang Xiao , Zheng Chenghao , Su Lingdong 
Published: June 2023

Abstract
The urban 35kV substation is the link between the main network and the distribution network, and the economic power supply and site selection optimization are the keys to the coordinated planning of the main network and the distribution network. A comprehensive evaluation system is established for collaborative economic planning of the main distribution network from three aspects: social benefit, construction economy, and operation economy, and the combination of scale expansion method and rough set method is applied to determine the combined weight of indicators. Based on this index system, a comprehensive evaluation model for economic coordination planning of an intelligent main distribution network is established. It is applied to the economic effect evaluation of the main distribution network planning of a power supply company and the optimal location selection of substations. The results show that the proposed method is a new evaluation method for power grid collaborative planning. Under the premise of ensuring the economy and reliability of power supply, the collaborative planning level of the main distribution network has been significantly improved, and the planning results are better than the traditional site selection results. It not only expands the evaluation system for coordinated planning of the main network and distribution network but also provides guidance for the planning and construction of the main distribution network.
Joint Planning of CSP and New Energy Based on Bi-Level Programming Model
Authors: Chen Xiangdong , Zuo Peng , Yu Xuan , Wan Zhendong , Ren Ziyuan 
Published: June 2023

Abstract
As a flexible unit that can respond quickly, CSP stations can be included in the planned power source of power supply planning, which can effectively improve the consumption of volatile new energy and improve resource utilization. This paper mainly studies the optimal planning of power grids containing CSP stations and fluctuating new energy sources and proposes joint power planning based on the bi-level programming model. The results of calculation examples show that the proposed bi-level programming model considering CSP stations is better in terms of economy, efficiency, and practicality and is of great importance to the improvement in the cleanliness of system operation and energy utilization.
Effect of Synthetic Jet Actuator with Different Pulse Waveforms on Fan Blade Lift
Authors: Xu Junjie , Tang Changjun , Chang Jianlong 
Published: June 2023

Abstract
The lift of wind turbine blades is a significant factor influencing the working efficiency of wind turbines. The influence of synthetic jet actuator on the lift of fan blades is studied in this manuscript. The influence of different pulse waveforms (sine wave, square wave and triangle wave) and different action positions (airfoil front end and rudder front end) on fan blades is analyzed. It is found that when the synthetic jet actuator acts on the airfoil front end, the best lift effect on the fan blade exists in the square wave. While when acting on the front end of the rudder, the best lift effect on the fan blade appears in the triangle wave. When two positions are acted on by the synthetic jet actuator at the same time, the square wave is the best relative to the other two pulse forms. At the same time, the effects of three pulse forms on the surface vortex of airfoil are studied, the flow conditions of the three waveforms are investigated when the airfoil is in a steady state of flow. The vortices formed by square waves can better adhere to the airfoil, while the vortex formed by the triangle wave can be separated from the airfoil faster.
Photovoltaic MPPT Control Strategy Based on Improved Conductance Increment Method
Authors: Liu Xiao Dong 
Published: June 2023

Abstract
In this research, a new incremental conductance approach with variable step size is suggested in order to address the inadequacies of the conventional incremental conductance method in tracking accuracy and dynamic reaction speed. In this paper, an absolute value of dP / (dV – dI) is used as the change in step size, and the step size of the tracking process is dynamically adjusted using the exponential function as the adjustment coefficient to reduce the maximum power point’s tracking duration. Finally, on the Matlab platform, a simulation system was created. According to the simulation findings, the suggested approach has less steady-state oscillations and can track the maximum power point more quickly than the conventional conductance increment method, which increases the efficiency of solar power generation.
Research on Improved Control Technology of Power Converter in DC Grid System
Authors: Hu Jinhao , Zhang Kun 
Published: June 2023

Abstract
With the development of distributed clean energy, the DC grid system begins to highlight its advantages. Based on the virtual motor theory, the control strategy of a DC power converter is proposed. The DC side adopts the virtual DC motor control to enhance the system’s inertia and damping and improve the stability of the DC grid system. Then, the power converter in the DC grid system is designed, and the mathematical model of virtual motor control is established. Finally, for a typical DC grid system, the simulation results using software verify the correctness and effectiveness of the proposed technical path of DC power grid, providing a new technology roadmap for the research of DC power grid and power converter.
Speed Sensorless Control of Doubly Salient Machine Based on Improved Pulsating High-Frequency Injection
Authors: Chen Chao 
Published: June 2023

Abstract
In traditional pulsating high-frequency injection (PHFVI), the PI regulator is usually used to extract rotor position information of the machine. The PI regulator has some shortcomings, such as poor tracking performance and weak anti-interference ability. Thus a new full-order state observer is proposed to extract rotor position information in this paper. This method firstly uses the PHFVI to get the rotor position error signal and then establishes a full-order state observer according to the mechanical motion equation of the machine to estimate the rotor position and speed. This paper introduces a new coordinate transformation to further decouple the mathematical model of the double salient machine (DSM). The results of simulation in MATLAB/Simulink show that the method proposed in this paper has effectiveness and anti-interference performance and has a certain reference value for the research of speed sensorless control of DSM.
Research on the Effect and Dynamics of Calcium Oxide on Pyrolysis Behavior of Medium and Low-Rank Coal
Authors: Liu Shuanglin 
Published: June 2023

Abstract
With a self-developed laboratory pyrolysis device, the effects of the materials particle size on the yield of Jinjie coal and lime co-pyrolysis products and gas components were investigated. The results shows that the raw material particle size has a significant effect on the coal pyrolysis process. With the decrease of raw material particle size, the tar yield in the pyrolysis product decreases, while the pyrolysis gas yield increases, and the H2 content in the pyrolysis gas increases. As the same time, the temperature distribution and volatiles precipitation rate of materials with different particle sizes were measured, and the macro-reaction kinetic parameters of the co-pyrolysis of coal and lime have been obtained.
Short-term Wind Power Prediction Method Based on Genetic Algorithm Optimized XGBoost Regression Model
Authors: Li Xiangcheng , Wang Jialong , Geng Zhirui , Jin Yang , Xu Jiawei 
Published: June 2023

Abstract
In order to solve the problem of accuracy and rapidity of short-term prediction of wind power output, the eXtreme Gradient Boosting (XGBoost) regression model is used in this paper to predict wind power output. For the models commonly used at the present stage, such as Long Short Term Memory (LSTM), random forest and ordinary XGBoost model, the modelling time is long, and the accuracy is not enough. In this paper, a genetic algorithm (GA) is introduced to improve the accuracy and speed of prediction of the XGBoost regression model. Firstly, the learning rate of the XGBoost model is optimized by using the good searching ability and flexibility of the genetic algorithm. Then variable weight combination prediction is carried out. The objective function for this problem is the mean square error that occurs between the value that is predicted and the value that actually occurs in the training set. GA is responsible for determining the model’s final weight. The historical output data of the wind plant is used in this paper to verify the XGBoost regression model based on a genetic algorithm and get the predicted value, which is then compared with the prediction results of LSTM and random forest algorithm. Example simulation and analysis show that the XGBoost regression model optimized by the genetic algorithm can be more significantly in solving the accuracy and rapidity of the prediction of short-term wind power output.
Design of 2.45-GHz High-Efficiency Miniaturized Power Oscillator Using GaN HEMT
Authors: Guo Qingyu , Lu Yifeng , Mao Chaowu , Zhou Jianyang 
Published: June 2023

Abstract
This study presents a method for designing a highly efficient miniaturized power oscillator with gallium nitride high electron mobility transistor (GaN HEMT). A harmonic-tuning highly efficient power amplifier (PA) using GaN HEMT is designed firstly by finding optimal fundamental, 2nd and 3rd harmonic load impedances. After the performance of PA meets the requirements, the feedback circuit that is made of a hairpin resonator and a coupler is studied based on the power gain of PA and the required frequency. Both the size of the PA and the feedback circuit should be taken into account to minimize the oscillator at last. Finally, the PA and feedback circuit are combined into a power oscillator. Through this way, the highly efficient miniaturized power oscillator with a size of 2.7*4.9 cm2 fabricated on substrate of FR4 outputs 37.7 dBm power and 72% efficiency at 2.4518 GHz under the bias condition of Vgs = - 3.21V, Vds = 28V, Ids = 25mA.
A Method for Calculating Aggregate Flexibility Parameters of Virtual Power Plant Based on Improved Column and Constraint Generation Algorithm
Authors: He Yongsheng , Xie Yanbin , Cheng Chao , Liu Baoshan , Xiao Qiang , Fan Xuan , Liang Huishi , Gong Xiaoxu 
Published: June 2023

Abstract
The virtual power plant (VPP) can aggregate massive, dispersed, and heterogeneous distributed energy resources (DERs) and provide an effective energy management way for an active distribution system (ADS). In this paper, three parameters of upper and lower limits of active power output, ramping, and discharging energy is used to describe the aggregate flexibility of VPP. Based on this, a two-stage robust optimization (RO) model with dispatch instructions (DI) from the superior power grid (SPG) as uncertainty variables was constructed. Considering that the range of DI from the SPG changes during the iteration of the column and constraint generation (C&CG) algorithm, a position set is proposed to record the boundary information of the uncertain set of DI issued by the SPG when the sub-problem (SP) finds the worst scenario in each iteration, and the corresponding constraints are added to the master problem (MP). For the solution of SP, the bilevel max-min model is firstly transformed into a single-level bilinear programming (BLP) model by the duality theory and then solved by the concave-convex process (CCP) iterative method. Compared with transforming the BLP problem to a mixed integer programming (MILP) problem based on Karush-Kuhn-Tucker (KKT) condition, it can not only meet the engineering accuracy but also greatly save the solution time. Finally, the effectiveness of the proposed model and algorithm was verified on a modified IEEE 33-bus system.
Transmission Line External Breakage Early Warning Method Based on Electric Field Perception
Authors: Tang HaiTao , Li MengXuan , Zhao ZhenQiang , Ma Xiao , Li YuWen , Yang Zhi , Yu JinDong 
Published: June 2023

Abstract
To prevent construction machinery from intruding into the transmission corridor during operation and causing damage to the normal operation of the line, this paper uses the relationship between the horizontal distance of the boom measurement point at the minimum safe distance, the angle of the boom to the ground and the field strength as a comprehensive criterion to carry out an early warning of the transmission line breaking. The method studied in this paper can provide a simple and accurate distance warning method for various types of construction machinery when they work in the vicinity of different types of transmission lines.
Optimization of short-term wind power prediction of Multi-kernel Extreme Learning Machine based on Sparrow Search Algorithm
Authors: Wang Fan , Gao Guige 
Published: June 2023

Abstract
Aiming at the problem that the single kernel function of kernel extreme learning machine (KELM) cannot adapt to the variable actual wind power. This paper proposes a modified prediction model which can increase the accuracy of prediction. The prediction model uses multiple kernel functions instead of a single kernel function and optimizes the kernel parameters by using a sparrow search algorithm (SSA). Finally, through the simulation and comparison experiments, the proposed prediction model has better prediction accuracy than the conventional prediction model.
The novel XYU-GEM to resolve ambiguities
Authors: Flöthner K.J. , Brunbauer F. , Ferry S. , Garcia F. , Janssens D. , Ketzer B. , Lisowska M. , Muller H. , de Oliveira R. , Oliveri E. , Orlandini G. , Pfeiffer D. , Ropelewski L. , Samarati J. , Sauli F. , Scharenberg L. , van Stenis M. , Utrobicic A. , Veenhof R. 
Published: June 2023

Abstract
Removing ambiguities within a single stage becomes crucial when one can not use multiple
detectors behind each other to resolve them which naturally is the case for neutral radiation. An
example would be RICH detectors. Commonly, pixilated readout is choosen for this
purpose. However, this causes a remarkable increase in quantity of channels. Thus, the overall
costs of the detector would increase. Therefore, the XYU-GEM was proposed as a three coordinate
strip-readout which is combined with a triple GEM detector. The readout complements a common XY
readout with an additional projection which is tilted by 45°. The overdetermination due to three
projections can be used to resovle ambiguities. Following the detector design will be explained,
first measurements discussed to understand the response of the detector and a way to change the
charge sharing without changing the manufacturing parameters of the readout.
Design of a compact Thomson Parabola Spectrometer for diagnostics of proton-boron fusion reaction products initiated by laser
Authors: Kurmanova A. , Petringa G. , Catalano R. , Cirrone G.A.P. 
Published: June 2023

Abstract
The proton-boron aneutronic fusion reaction has numerous potential applications varying
from controlled nuclear fusion reactor to broad-energy spectrum α-particle source, as well
as uses in medicine, where it can serve as a source for radioisotope production, or directly in
proton boron capture therapy. However, proton-boron fusion reaction and its by-products should be
investigated extensively to provide a stable and controlled secondary ion source. In order to
monitor the multi-ion beam emitted and accelerated from the target surface after interaction with
laser pulses, a new Thomson Parabola Spectrometer (TPS) has been designed to differentiate proton
and alpha traces in the energy ranges 0.5–5 MeV and 1–10 MeV respectively,
with a high energy resolution (≤ 1%), while maintaining compactness of the spectrometer
(∼ 20 cm).
The construction and characterization of MgO transmission dynodes
Authors: Chan H.W. , Prodanović V. , Theulings A.M.M.G. , Tao S. , Smedley J. , Hagen C.W. , Sarro P.M. , Graaf H.v.d. 
Published: June 2023

Abstract
In this work we demonstrate that ultra-thin (5 and 15 nm) MgO transmission dynodes
with sufficient high transmission electron yield (TEY) can be constructed. These
transmission dynodes act as electron amplification stages in a novel vacuum electron multiplier:
the Timed Photon Counter. The ultra-thin membranes with a diameter of 30 μm are arranged in
a square 64-by-64-array. The TEY was determined with a scanning electron microscope using primary
electrons with primary energies of 0.75–5 keV. The method allows a TEY map of the surface
to be made while simultaneously imaging the surface. The TEY of individual membranes can be
extracted from the TEY map. An averaged maximum TEY of 4.6±0.2 was achieved by using
1.35 keV primary electrons on a TiN/MgO bi-layer membrane with a layer thickness of 2 and
5 nm, respectively. The TiN/MgO membrane with a layer thickness of 2 and 15 nm,
respectively, has a maximum TEY of 3.3±0.1 (2.35 keV). Furthermore, the effect of the
electric field strength on transmission (secondary) electron emission was investigated by placing
the emission surface of a transmission dynode in close proximity to a planar collector. By
increasing the electric potential between the transmission dynode and the collector, from
-50 V to -100 V, the averaged maximum TEY improved from 4.6±0.2 to 5.0±0.3
at a primary energy of 1.35 keV with an upper limit of 5.5 on one of the membranes.
The Economic Value of Forest Environmental Services for Mitigating Human-Wildlife Conflict in the Village Around Management Section of National Park (MNSP) VI Besitang, Gunung Leuser National Park
Authors: Sulistiyono N , Marsudi S , Ahda M , Asmanijar W , Tobing G L , Zahirah A 
Published: June 2023

Abstract
Human-wildlife conflicts is a serious problem that has been increasing in recent times. Conflict occurs as a result of high human activities around wildlife habitats. Conflict mitigation aims to reduce the problem of human conflict with wildlife. The valuation of forest environmental services was based on the quantitative value generated by natural resources and the environment, regardless of the market value of these goods and services. This study aims to determine the community’s willingness to pay (WTP) for forest environmental services in mitigating human-wildlife conflicts in Besitang, Langkat, North Sumatera. The study found five variables that affect the respondent’s WTP for environmental services to mitigate human-wildlife conflicts, there are monthly income, community perception of forest protection and conservation, community behavior utilizing forest products, community behavior in forest protection efforts, and community behavior in efforts to improve forest function. Utilizing the Contingent Valuation Method (CVM) as methodology, this study revealed the value of Rp.78,290/household/year contributes to paying for forest environmental services with a total WTP value of Rp. 739,992,105/year.
The properties of hardness and swelling of styrene butadiene rubber/silica/oleamide composites
Authors: Surya I , Anto J , Marpongahtun  
Published: June 2023

Abstract
This paper reports the results of the effects of oleamide addition on hardness, as one of the mechanical behaviours, of styrene butadiene rubber/silica (SBR/silica) composite. The base SBR was compounded with silica, as a reinforcing filler, and others compounding chemicals. The silica was compounded into the rubber matrix at 30 phr and others compounding chemicals were added based on the semi-efficient rubber compounding formulation. The compounding has been done using opened two-roll mills. Oleamide was added to the SBR/silica to improve the rubber-to-filler interaction and the mechanical properties of the SBR/silica composite. The oleamide was a lab-synthesizing chemical and was added into the SBR/silica with 4 different concentrations (2, 4, 6 and 8 phr). The SBR/silica compounds with and without oleamide were vulcanized at 150 °C using a typical cure meter. From the results; it was noticed that the hardness of the SBR/Si composite was increased as the oleamide was added to the SBR/Si compound. It was considered that the hardness improvement was attributed to the result of crosslinks improvement of the NR/silica/oleamide composites. The additions of the oleamide convert the rubber composites into more resistance to swelling. A greater degree of crosslinks would increase the swelling rejection/resistance but decrease the interpenetration of the toluene solution to the rubber composites. The oleamide acted as an additive which improved the properties of swelling and hardness of the SBR/Si mixtures/compounds and, a 2 phr of oleamide addition was the optimum concentration for the SBR/Si compound.
An Adaptive Reuse Development Through Highest and Best Use Assessment: Case Study the Ex-Warenhuis, Medan, Indonesia
Authors: Fitri I , Siregar F , Silvana  , Ariffin N F M , Ginting R , Indira S S 
Published: June 2023

Abstract
The ex-Warenhuis, built in 1919, is one of the remained heritage buildings in the city center of Medan, North Sumatra, Indonesia. It has been abandoned for years and experiencing deterioration; therefore, Medan Municipality Government is conducting an investigation and planning to adapt and reuse the building. The study aims to find opportunities and new functions which able to enhance the economic value of the building by carrying out a field survey to collect the data. Noteworthy that it considers creating new functions while advancing social development and environmental sustainability. In addition, the adaptation of this building continues to prioritize the aspects of authenticity and the principle of minimal intervention. This study performs the highest and best use assessment which consists of five stages, namely 1) Location Analysis, 2) Market Analysis, 3) Combination of stages 1 and 2, 4) Financial Eligibility, and 5) Best Alternative Recommendation to obtain new alternative functions that are following market trends and locations. The result of the highest and best uses analysis highlights the highest and best use as an adaptation of the ex-Warenhuis function as a commercial building consisting of multi purposes such as hall, retail, working space, restaurant, café, gallery.
Characterization and Antioxidant Activity of Phaleria macrocarpa (Scheff.) Boerl Leaf Ethanol Extract
Authors: Lestari I C , Lindarto D , Ilyas S , Widyawati T , Mustofa  , Jusuf N K , Hasibuan P A Z , Siahaan L 
Published: June 2023

Abstract
The leaves of Phaleria macrocarpa (Scheff.) Boerl is traditionally used to treat various diseases. Phaleria macrocarpa leaves contain flavonoids, alkaloids, tannins, glycosides, saponins, and steroids. This study aimed to identify the simplicia and extract, as well as the ethanol extract’s antioxidant activity, from Phaleria macrocarpa leaves. The extract was quantitatively tested using UV-Visible Spectrophotometry for its total phenol and flavonoid content. The DPPH IC50 test determined the antioxidant capacity. The simplicia characterization revealed a water content of 6.68 %, a water-soluble extract of 19.28 %, an ethanol-soluble extract of 19.31 %, a total ash content of 12.27 %, and an acid-insoluble ash content of 4.84 %. The ethanol extract’s characterization revealed a water content of 17.29 %, total ash content of 4.48 %, and acid insoluble ash content of 0.63 %. The flavonoid content was 55.08 mgGAE/g extracts, and the phenol level was 76.96 mgGAE/g extracts. The results of the DPPH test indicated that the ethanol extract of the leaves of Phaleria macrocarpa had a high potential for antioxidant activity, with an IC50 value of 73.91 ppm.