bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimal scheduling of wind energy storage microgrid considering demand response
Authors: Li Haibin , Sun Li , Wu Bin 
Published: May 2022

Abstract
As an effective way to improve the utilization efficiency of renewable energy, microgrid has received more and more attention in ensuring energy security and sustainable supply. Microgrid generally consists of power supply, energy storage system and load. However, the uncertainty of renewable energy generation makes it difficult to solve the problem of peak regulation of microgrid. In addition, demand response strategies are playing an increasingly important role in renewable energy consumption because they can use load flexibility to maintain supply and demand balance, rather than just regulating generation on the power side. This paper mainly studies the scheduling problem and demand response strategy of photovoltaic energy storage in microgrid, and outputs the optimal scheduling scheme of microgrid by solving the model.
Numerical study on wave attenuation performance of arc layout floating breakwater
Authors: Zhao Shuai , Cheng Yong , Ji Chunyan , Guo Jianting 
Published: May 2022

Abstract
The floating breakwater has the functions of resisting wave propagation and maintaining stability of water surface, and its layout form will have an impact on the shielding effect and the shielding area. This paper uses the CFD method for numerical calculation based on the self-compiled program. The hydrodynamic performance and wave attenuation performance of floating breakwater with arc layout are mainly studied, and the calculation results of linear layout are compared and analyzed. The results show that the rolling response of linear layout under the action of the cross wave is intense, and there is transverse inclination under the action of the oblique wave. The motion of arc layout is relatively stable under the action of cross wave and oblique wave, and the hydrodynamic performance is better. The wave attenuation performance of arc layout is better than that of linear layout under transverse wave condition, while the wave attenuation performance of arc layout is further improved under the oblique wave, and the wave attenuation performance of linear layout is decreased under the oblique wave. It can be seen that the arc layout has better shielding performance than the linear layout under the oblique wave.
Stability analysis of expansion and efficiency improvement of bulb tubular turbine
Authors: Tang Xiaoyong 
Published: May 2022

Abstract
Many bulb tubular turbines were put into operation earlier. The construction of upper and lower cascade power stations leads to the decrease of generating head. Unit efficiency decline can not reach the design output. Large quantities of water were abandoned from the power station. Taking the expansion and efficiency improvement of water turbine generator unit in Bailongtan Hydropower Station as an example. The stability and efficiency improvement before and after expansion are compared and analyzed. The transformation not only solves the problem of high vibration of low waterhead and failure to reach the designed output, but also increases the flow and output of the unit, reduces abandoned water of the power station, improves the utilization rate of hydraulic resources, improves the stability of the unit and ensures the safe operation of the power plant. The result of unit transformation is good. It can be used as a reference for the transformation of similar tubular units.
Calculation Method of Foundation-Subgrade Dynamic Interaction for Large Wind Turbine
Authors: Han Zhifan , Lu Guohua , Li Wen , Deng Guang 
Published: May 2022

Abstract
Taking a 3MW large wind turbine foundation as the research object, the dynamic interaction model of wind turbine foundation and subgrade is established. By intercepting the subgrade in a limited range and setting spring-damper elements at the boundary of the subgrade, the semi-infinite space of the subgrade is simulated. In order to facilitate the use of structural designers, the calculation methods of the stiffness coefficient and damping coefficient of the spring-damper element are simplified. The simplified calculation formulas for the stiffness coefficient and damping coefficient of the spring-damper unit are obtained when the intercepted subgrade range is 5 times and 10 times the wind turbine foundation.
Zoning Study on Influence Intensity of Cao’e River Sluice on River Network Drainage Based on 2D Numerical Model
Authors: Yu Junfeng , Chen Weijin , Fang Zhihao , Li Dongfeng , Li Zihao , Yang Le 
Published: May 2022

Abstract
Shaoxing City is located in the central and northern part of Zhejiang Province, generally showing the topographic trend of high in the South and high in the North. The South is mountainous and the North is plain. There are many rivers in the river network, which are staggered and complex. A two-dimensional mathematical model for flood control and drainage of river network in Shaoxing plain is established, the hydrodynamic influence of Cao’e River gate on river network in different regions is studied, and the characteristics of each region are analyzed. According to the zoning of the impact intensity of Cao’e River sluice on river network hydrodynamic force, six obvious zoning from strong to weak are obtained, and the characteristics of each region are analyzed. It has reference value for comprehensively formulating sluice dispatching operation procedures, changing river network hydrodynamic force distribution and other non-engineering countermeasures, and provides decision-making basis for river network comprehensive management and hydrodynamic force utilization.
Study on Geese Array Effect and Optimal Layout of Herringbone PV array
Authors: Liu Guiyuan , Hu Junhong , Liu Jiang 
Published: May 2022

Abstract
Layout parameters play a significant role in wind loads of PV array. In view of this, wind loads of the herringbone PV array composed of 9 panels under five array angles (30°,40°,45°,50°,60°), five installation angles (30°,40°,45°,50°,60°) and five array distances (1.5m,1.75m,2m,2.25m,2.5m), are investigated by using the SST k-ω turbulence model and unsteady RANS approach. Then laws of wind pressure subjected to parameters are evaluated by drawing the contour and boxplot. Results show that: in the construction of herringbone photovoltaic panels, array angle is preferably not greater than 45°, installation inclination angle is not greater than 50°, and optimal array distance is between 1.75m and 2.5m. It is expected to provide theoretical basis and scientific guidance for layout of the herringbone array and sand control in desert areas.
Numerical Simulation of Hydraulic Characteristics of Spillway Tunnel with Gradually Expanding Outlet and Lower outlet height
Authors: Deng Chengfa , Du Jincheng 
Published: May 2022

Abstract
Using a practical and efficient overall three-dimensional turbulent numerical model of the spillway tunnel, the numerical simulation of the hydraulic characteristics of the spillway tunnel with the gradually expanding outlet and lower outlet height is carried out. The calculation results show that when the gate is fully open, there is pressure flow in the whole tunnel of the spillway tunnel, and the flow state is stable; when the gate is not fully open and the water level is low, the flow state in the tunnel is unstable, and the free and pressure flow occur alternately. When the gate is at a small opening, the flip bucket raises the water level at the outlet, and the lower outlet height causes insufficient air supply in the cave, which is prone to cavitation. The lift distance is small, and it is easy to scour the slope of the hole. The lower outlet height at the outlet of the spillway tunnel further exacerbates the complexity of the hydraulic characteristics in the back arc section, which should be paid attention to during design and construction, and it is necessary to carry out hydraulic model test research.
Numerical investigation for CO2/N2 mixture gas - liquid Taylor flow in microchannel by CFD simulation
Authors: Zhong Qiuwen , Zhou Jiancheng , Jiao Zhen 
Published: May 2022

Abstract
Taking CO2/N2 and water as a system, the influence of microchannel inlet structure on the hydrodynamics of gas-liquid two-phase Taylor flow is numerically simulated by using VOF and species transport model. The flow properties of Taylor flow in perpendicular inlet structure are firstly explored, and the simulation results are compared with the inlet structures with different angles. The microchannel inlet structure has an obvious effect on the flow properties of Taylor flow. The simulation results provide some guidance for the design of micro reactor.
Design of power system excitation auxiliary controller based on Multi-Agent
Authors: Hou Qiuhua , Meng Fanmin , Liu Xiaoyu , Qi Xiaoyan , Ding Huifang , Chen Xuju 
Published: May 2022

Abstract
The continuous access of new energy to the power grid increases the complexity of the structure of the power system, which brings hidden dangers to the security of new energy power system. In order to further enhance the operation stability and security of new energy grid, a generator excitation auxiliary controller based on multi-agent is proposed in this paper. Firstly, the multi-agent model of power system is established, and then the distributed output feedback controller is designed for the generator model. The parameters of the controller are calculated and solved by H ∞ theory. Finally, the effectiveness of the controller designed is verified by simulation analysis.
Charged particles interaction in both a finite volume and a uniform magnetic field: II. Topological and analytic properties of a magnetic system
Authors: Guo Peng , Gasparian Vladimir 
Published: May 2022

Abstract
In present work, we extend Lüscher formula-like formalism to few-body system in a uniform magnetic field with Dirichlet boundary conditions. As a signature of non-trivial topological systems, the energy spectrum of topological edge states show up in the gap between allowed energy bands.
The Relationship Between Socio-Demographic Environment and Trip Preferences Towards Relaxation Facilities in Urban Area (Case Study: Modern Café in Makassar)
Authors: Yatmar H , Ramli M I , Pasra M , Ikbal M 
Published: May 2022

Abstract
This study aimed to investigate the trip preferences on relaxation facilities specific to café in Makassar city. For this purpose, 1,184 visitors are the respondents who have visited modern café in Makassar: Anomali, Grid and Pool, Numerica, Fireflies, and Black Canyon Coffee. A descriptive analysis was conducted to evaluate the trip preference due to socio-demography background. The finding shows that the trip purpose preferences among the socio-demography characteristics were similar. The dominant trip purposes sequentially are “hangout and refreshing”, “eating and drink”, and “study”. The significance of this study is to provide a travel demand preference according to the socio-demography background related to trip purpose in the café as one of the relaxation facilities that affect the trip attraction in the urban area.
Test of mindful motorcycling as a psychological intervention to increase awareness of riding
Authors: Dewi M P , Sulthoni M I , Puspitaningrum B C , Kusumastuti A N , Marissa A , Prabowo H 
Published: May 2022

Abstract
The purpose of this study was to test mindful motorcycling interventions to raise awareness of driving on motorcyclists. Mixed method research is conducted with qualitative research followed by quantitative experiment research. Both of these methods result in increased awareness in motorcyclists.
Road Infrastructure Deficiency and Road Safety Audit at Black Spot Area in Rural Road
Authors: Sugiyanto G , Suciningtyas R , Indriyati E W , Yanto  , Mulyono B , Santi M Y 
Published: May 2022

Abstract
One of the factors that caused traffic accidents is road infrastructure. Strategies to minimize the road deficiency infrastructure is implementation of the forgiving road, self-explaining road, and self-regulating road. The purpose of this study was analyzing the deficiency of road infrastructure and implementing the road safety audit at black spot areas in rural areas. Study location in Bojongsari Street, Purbalingga. Parameters that are analyzed in deficiency of road infrastructure include the road geometric condition, road pavement performance, and road equipment facilities. Parameters that analyzed in road geometric condition, namely stopping and passing sight distance, lane width of road, and road shoulder width. The results of this study show that the highest passing and stopping sight distance of all vehicles was motorcycles at 304.48 m and 64.67 m. The road pavement performance based on pavement condition index for the longitudinal/transverse cracking conditions is 94 and for the lane or shoulder drop-off condition is 77. Recommendations given based on road safety audit results for road geometric is to improve the road shoulder, for pavement condition improves shoulder drop-off and longitudinal/transverse cracking. For the road equipment facilities are to install the maximum speed limit sign of 40 km/h and install the warning sign.
Design of climbing lane on provincial road study case in Magetan Districts East Java
Authors: Arpriyanita V P , Tjahjono T 
Published: May 2022

Abstract
The roads from Magetan Districts (East Java) to Surakarta Districts (Central Java) have high climbing conditions. This is because the location is in the mountains. This study, discusses the design of then climbing lane on road Magetan Districts, precisely on Tawangmangu-Plaosan. A climbing lane is a path that is used as an additional route added to a single or multiple traffic lane which serves to increase capacity and/or safety due to a steep gradient. The method of collecting data is by conducting a field survey to review vehicle speed, vehicle volume, road dimensions, and elevation. The results of the study were used to determine the exact location of the climbing lane, to design the climbing lane using the England Standard concept combined with literature studies.
On the use of large-eddy simulation time data coarsening for dispersion forecasting in the SILAM atmospheric composition model
Authors: Varentsov A I , Stepanenko V M , Mortikov E V , Debolskiy A V , Kouznetsov R D , Sofiev M 
Published: May 2022

Abstract
The paper presents the results of one-way coupling of a large eddy simulation model and an atmospheric composition and diffusion complex SILAM. This study investigates a possibility of large eddy simulation time data coarsening (filtering) for use in SILAM for microscale calculations. Experiments with scalar tracers with a limited lifetime are carried out under conditions of convective boundary layer. A comparison between the calculations with filtered and nonfiltered data demonstrate that time data coarsening is possible without a significant loss in accuracy for tracers whose lifetime is much longer than the coarsening scale and the timestep of the filtered data.
Experimental simulation research on TMCP of 30MnCr22 oil well pipe
Authors: Wang Xiaodong , Bao Xirong , Cen Yaodong , Chen Lin 
Published: May 2022

Abstract
Thermo-mechanical controlled process (TMCP) of 30MnCr22 oil well pipes was investigated by experimental simulation. The results showed that controlled rolling of TMCP effectively exerted the comprehensive effects of grains refinement by recrystallization in piercing and continuous rolling and deformation strengthening by strains accumulation in the non-recrystallization zone of reducing deformation. And the key point of TMCP is that quenching realized the microstructural heritability of fine and strengthened austenite, which achieved the best refinement of martensite laths to be 170 nm, nanoscale carbides with the average size of 101 nm and dislocations with the high-density of 8.38 × 109 mm−2, presenting a kind of complicated multi-layer microstructural characteristics. Finally, the synergistic strengthening effects on fine grain strengthening, laths refinement strengthening, dislocation strengthening and precipitation strengthening were realized by TMCP. Further, the synergistic strengthening mechanisms are explored to be that quenching enforced the interaction between martensite laths and dislocations, as well as the entanglement between θ-(Fe, Cr)3C and dislocations.
Organs’ absorbed dose and comparison of different methods for effective dose calculation in computed tomography of parathyroid glands
Authors: Dimitroukas Christos P , Metaxas Vasileios I , Efthymiou Fotios O , Zampakis Petros E , Kalogeropoulou Christina P , Panayiotakis George S 
Published: May 2022

Abstract
Objective. To estimate organs’ absorbed dose from the two-phase CT of parathyroid glands, effective dose (ED) based on three different methods, and compare the dose values with those reported by other published protocols. Methods. Volumetric computed tomography dose index (CTDIvol), dose length product (DLP), and the corresponding scan length during each phase of a parathyroid protocol were recorded, for seventy-six patients. One k-factor, and two different k-factors for the neck and chest area were used to estimate the ED from DLP. A Monte Carlo software, VirtualDoseCT, was also used for the estimation of organs’ absorbed dose and ED. Results. Two-phase parathyroid CT resulted in a mean ED of 3.93 mSv, 4.29 mSv and 4.21 mSv according to the one k-factor, two k-factors, and VirtualDoseCT methods, respectively. The two k-factors method resulted in a slight overestimation of 1.9% in total ED compared to VirtualDoseCT. No statistically significant difference was found in ED values between these methods (Wilcoxon test, p > 0.05), except for female patients in the pre-contrast phase. The organs inside the scanning field of view (SFOV) received the following doses: thymus 23.3 mGy, lungs 11.5 mGy, oesophagus 9.2 mGy, thyroid 6.9 mGy, and breast 6.3 mGy. The ED and organs’ dose (OD) values were significantly lower in the pre-contrast than in the arterial phase (Wilcoxon test, p < 0.001). A statistically significant difference was observed between male and female patients for the pre-contrast phase (Mann-Whitney test, p < 0.05), regarding the ED values obtained with the two k-factors method and VirtualDoseCT software. Conclusions. The two k-factors method could be applied for the ED estimation in clinical practice, if appropriate software is not available. An extensive range of ED values derived from the literature, mainly depending on the acquisition protocol parameters and the estimation method.
First-principles investigations to evaluate Mo2B monolayers as promising two-dimensional anode materials for Mg-ion batteries
Authors: Mei Tiantian , Wu Jianbao , Lu Shuhan , Wang Bingqian , Zhao Xinxin , Wang LiLi , Yin ZhiXiang 
Published: May 2022

Abstract
Magnesium-ion batteries have the potential to replace the current commercial Li-ion batteries due to their eco-friendliness and cost-effectiveness. However, because of the strong polarization of Mg ions, conventional electrode materials find it difficult to capture Mg ions. In order to find an excellent anode material for Mg-ion batteries, we used density functional theory to evaluate the applicability of T-type and H-type Mo2B monolayers as electrode materials for Mg-ion batteries. The simulation results show that the adsorption energies of T-type and H-type Mo2B monolayers for Mg atoms are −1.08 eV and −0.78 eV (−2.16 eV and −2.14 eV with the solvent effect), respectively, which are sufficient to ensure the stability of the procession of magnetization. In addition, the ultra-low diffusion barriers (0.057 eV/0.110 eV) of Mg atoms on their surfaces show a good charge and discharge rate. The theoretical specific capacity (529 mA h g−1) and the theoretical voltages (0.65 V/0.40 V) indicate that T-type and H-type Mo2B monolayers are promising anode materials for Mg-ion batteries.
Hypoxia-induced polarization of M2 macrophages and C-C motif chemokine ligand 5 secretion promotes the migration and invasion of trophoblasts
Authors: Chen Xin , Song Qian Lin , Ji Rui , Wang Jia Yu , Li Ze Hong , Xiao Zhuo Ni , Guo Duan Ying , Yang Jing 
Published: May 2022

Abstract
In the early stage of pregnancy, hypoxia in the placenta is of great significance to the migration and invasion of trophoblasts. In addition, changes to the polarity and activity of macrophages can affect embryo implantation, trophoblast migration and invasion, and vascular remodeling by affecting cytokine secretion. However, the mechanism of the effects of hypoxic conditions in the placenta on trophoblasts remains unknown. We used gene knockdown on macrophages, and drug treatment on trophoblasts, and cultured them under hypoxic and normoxic conditions. The cells were then subjected to wound-healing assays, Transwell cell invasion experiments, quantitative real-time reverse transcription Polymerase Chain Reaction (PCR), western blotting, and immunofluorescence. The polarization of macrophages in each group, the migration and invasion ability of trophoblasts, and changes to the phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K)/protein kinase B (AKT) signaling pathway were detected. Hypoxic conditions induce M2 polarization of macrophages. The conditioned medium from macrophages under hypoxic conditions increased the migration and invasion of trophoblasts and enhanced the levels of phosphorylated (p)-PI3K and p-AKT in trophoblasts. After C-C motif chemokine ligand 5 knockdown in macrophages, the ability of conditioned medium from macrophages cultured under hypoxic conditions to promote the migration and invasion of trophoblasts was weakened significantly. The use of PI3K/AKT signaling pathway agonists could reverse the attenuation effect caused by C-C motif chemokine ligand 5 knockdown.
Loss of Raptor induces Sertoli cells into an undifferentiated state in mice
Authors: Xie Minyu , Hu Xiao , Li Lei , Xiong Zhi , Zhang Hanbin , Zhuang Yuge , Huang Zicong , Liu Jinsheng , Lian Jingyao , Huang Chuyu , Xie Qiang , Kang Xiangjin , Fan Yong , Bai Xiaochun , Chen Zhenguo 
Published: May 2022

Abstract
In mammals, testis development is triggered by the expression of the sex-determining Y-chromosome gene SRY to commit the Sertoli cell (SC) fate at gonadal sex determination in the fetus. Several genes have been identified to be required to promote the testis pathway following SRY activation (i.e., SRY box 9 (SOX9)) in an embryo; however, it largely remains unknown about the genes and the mechanisms involved in stabilizing the testis pathway after birth and throughout adulthood. Herein, we report postnatal males with SC-specific deletion of Raptor demonstrated the absence of SC unique identity and adversely acquired granulosa cell-like characteristics, along with loss of tubular architecture and scattered distribution of SCs and germ cells. Subsequent genome-wide analysis by RNA sequencing revealed a profound decrease in the transcripts of testis genes (i.e., Sox9, Sox8, and anti-Mullerian hormone (Amh)) and, conversely, an increase in ovary genes (i.e., LIM/Homeobox gene 9 (Lhx9), Forkhead box L2 (Foxl2) and Follistatin (Fst)); these changes were further confirmed by immunofluorescence and quantitative reverse-transcription polymerase chain reaction. Importantly, co-immunofluorescence demonstrated that Raptor deficiency induced SCs dedifferentiation into a progenitor state; the Raptor-mutant gonads showed some ovarian somatic cell features, accompanied by enhanced female steroidogenesis and elevated estrogen levels, yet the zona pellucida 3 (ZP3)-positive terminally feminized oocytes were not observed. In vitro experiments with primary SCs suggested that Raptor is likely involved in the fibroblast growth factor 9 (FGF9)-induced formation of cell junctions among SCs. Our results established that Raptor is required to maintain SC identity, stabilize the male pathway, and promote testis development.