bluuebunny/crossref_metadata_2025_split huggingface dataset:
Flame detection method and application based on RGB-HSI model and initial flame growth characteristics
Authors: Zhou Yuquan , Liu Guanjie , Xie GuoDong 
Published: June 2024

Abstract
The safe and stable operation of hydraulic machinery equipment cannot be separated from various auxiliary electrical equipments and lubricating oils. And these are important factors in the occurrence of fire. Fire detection is used to detect fire hazards during the operation of hydraulic machinery equipment, which is of great significance to ensuring safety and stable operation of hydraulic machinery equipment and reducing economic losses. Traditional fire detection methods require the detector to be put close to the fire source, and the detector is also prone to interference, resulting in delayed detection, false alarm and missed alarm. To solve these problems, a flame detection method based on RGB-HSI model and initial flame growth characteristics is proposed in this paper. Firstly, after image processing such as binarization, filtering and dilation, the connected region of pixels is divided and the total amount of flame pixels is calculated. Finally, the region where the growth ratio of flame pixels exceeds the growth ratio threshold for three consecutive calculations is marked and alerted. The experiment proves that the real-time and accurate identification of the initial flame can be realized by combining the above image processing technology with the initial fire growth characteristics.
Energy storage peak-shaving demand prediction based on an improved neural network with hidden layers
Authors: Deng Dingshan 
Published: June 2024

Abstract
The result shows that the BP neural network has a very low convergent speed for load prediction, which leads to local optimization. This paper presents a modified GA for the optimization of the threshold value, the initial weight, and the addition of the smoothing coefficient. In addition, it improves the BP neural network’s adaptive learning speed and further improves the efficiency of the search. The proposed model is characterized by high convergent speed and global space retrieval capability. To validate the validity of the modified GA-BP model, the prediction of power load in some regions is made. Compared with the BP neural network forecast algorithm, this method has better performance in terms of prediction accuracy and takes less time in terms of prediction time than the BP neural network. In parallel, the realization of multiple sources of electricity from wind, solar, and heat storage is an important way to deal with large-scale new grid connections. Starting from an improvement in the efficiency of wind and PV generation, it is also possible to build a joint optimization scheduling model for wind, solar, and heat storage. The purpose of taking the minimum net load fluctuation is for optimization. Taking the typical output day of user scenarios as the optimization scenario, the scheduling strategies of wind power, PV, thermal units, and energy storage systems are introduced and simulated on the platform. It is proved that the proposed model can decrease the reduction ratio and the peak and valley load.
The technology of precise tapping of remaining oil during the high water cut stage of offshore multi-layer reservoirs driven by big data intelligence
Authors: Li Tingli , Yuan Zhiqian , Liu Chunyan 
Published: June 2024

Abstract
Based on traditional numerical simulation and optimization algorithm, combined with the “hard data” monitored by stratified injection and production real-time monitoring and automatic control technology, a fine reservoir model integrated reservoir knowledge and development law was established, and the remaining oil potential exploitation during high water cut stage was quantified and evaluated by deep forest method to adjust well productivity, greatly improving the remaining oil potential exploitation effect. The innovation has formed a set of accurate remaining oil potential tapping technology based on big data intelligent drive in offshore multi-layer reservoirs with high water cuts. This technology fully adopts the automatic and intelligent characteristics of data-driven and deep forest algorithms, and the historical fitting rate of production dynamic during the high water cut stage is more than 90%, which can accurately guide the design and implementation of the remaining oil potential tapping scheme and provide a reference for similar oil fields.
Capacity planning of household photovoltaic and energy storage systems based on distributed phase change heat storage
Authors: Shao Guangyi , Zhang Yanchi , Wu Hao , Wei Qing , Wu Qian 
Published: June 2024

Abstract
With the global energy reform, the energy storage field has become one of the current research hotspots. This paper considers the distributed phase change material unit (PCMU) system. First, the distributed PCMU model and the photovoltaic and energy storage systems model are constructed. Second, the actual capacity of the distributed PCMU that can participate in dispatching is analyzed. Finally, a calculation example is solved, and the optimal heat storage and electricity storage capacity is solved through the particle swarm algorithm. The results show that the constructed system has economic benefits.
Effect of fuel injection pressure on biodiesel blended combustion of Inland River diesel engine
Authors: Pu Xigang , Jiang Guohe 
Published: June 2024

Abstract
Compared with ordinary diesel, biodiesel has greater viscosity, density, and flash point, especially under medium and low load, which is easy to cause poor atomization and inadequate combustion. In this paper, an in-line six-cylinder inland river ship diesel engine was used as a model to conduct simulation tests under 50% load of propulsion characteristics to explore the effects of different fuel injection pressures on oil-gas mixing, combustion, and emission of fuel blended with a small percentage of biodiesel. The results show that the increase of fuel injection pressure can enhance the average turbulence intensity in the cylinder as well as increase the relative flow velocity between oil and gas, which is beneficial to the mixture combustion. High fuel injection pressure will promote flame propagation, increasing the maximum burst pressure and the average temperature in the cylinder. Compared to the fuel injection pressure of 24 MPa, NOx emission increases by 5.5% and 15.6% respectively at 27 MPa and 30 MPa, and decreases by 10% and 25% respectively by SOOT.
Methods of controlling fluid production from extracted layers of the same well injection-production in old oilfields
Authors: Dong Yuning 
Published: June 2024

Abstract
The implementation of the same well injection-production for old wells can reduce production costs, reduce the amount of surface-produced water treatment, improve the utilization rate of old wells, and further improve the water-driven recovery of oil wells. However, the difference in the physical properties of the reinjection section and the extraction section leads to an increase in the output of the extraction section and a limited amount of reinjection in the reinjection section. This results in an increase in the dynamic fluid level and the casing pressure at the wellhead, which not only has a greater impact on the same well injection-production tubing column but also poses a great safety hazard to the surface construction personnel. There is a great safety hazard for the construction personnel. Due to the limitation of the same well injection-production tubing column, it is impossible to use equipment such as a packer to limit the production volume of the recovered layer. The use of resin and cement to seal the tampering operation is not only expensive and risky, but also difficult to control the production volume of the recovered layer with a short period of validity. In order to achieve the effect of limiting the production of the extracted layer, the production of the extracted layer is controlled by reducing the number of re-shot holes after blocking the extracted layer by cementing operation. Therefore, it is necessary to optimize the shot hole parameters of re-shot holes after plugging the extraction wells in the same injection-production well using the finite element method. The results of the study show that the seepage resistance in the near-well zone is mainly affected by the number of shot holes and the depth of penetration of the shot hole apertures. In contrast, the diameter of the shot hole apertures, the density of the shot holes, the position of the shot holes, and the phase angle of the shot holes have little effect on the pressure in the near-well zone.
Design of corresponding fracturing parameters based on thin sand reservoir characteristics
Authors: Wei Guanglei 
Published: June 2024

Abstract
China’s onshore oil fields have entered the late stage of development, while the reserves of thin-poor layers account for a large proportion of the remaining recoverable reserves. The development of thin-poor reservoirs has become an important potential for tapping potential. In this paper, the numerical simulation method is used to optimize the crack radius corresponding to the fracturing of the thin-poll injection-production system. The optimization results show that the fractured radius of the well has a greater impact on the final cumulative oil production and recovery when the fractured radius does not break the permeability boundary for a thin reservoir with a fracture penetration ratio of water and oil wells between 35% and 45%. when the oil well is in the high permeability area and the water well is in the low permeability area, the fractured radius of the well and the surrounding area of the oil well are used. The situation has a greater impact on the final oil production.
Optimization of surfactant-enhanced injection parameters in Lamadian oilfield
Authors: Wang Hao 
Published: June 2024

Abstract
Optimizing injection fluid parameters is critical for the development of unconventional reservoirs since it is the principal strategy for increasing surfactant recovery in low-permeability reservoirs. This study used numerical simulation methods to objectively investigate the influencing variables under various injected surfactant values, based on the reservoir features of the target block. Additionally, it established the yield relationship corresponding to changes in reservoir pressure. Consequently, a correlation was established between the amount of injection, concentration of surfactant, distance between wells, extreme difference in permeability, and increase in pressure. This led to the determination of appropriate injection parameters for enhancing surfactant permeability. The study’s findings have practical implications for determining the appropriate injection scale of a reservoir surfactant system.
Design of positive pulse measurement while drilling system for mine rotary valve mud
Authors: Li Zongming , Pang Yanyan , Liu Ying , Ke Chen , Xudong Song , Zichen Liang 
Published: June 2024

Abstract
For the drilling of directional wells and horizontal wells, to ensure that the drilling trajectory is drilled in the coal seam in the direction designed before drilling, it is necessary to transmit information without interrupting the drilling process. The drilling fluid pressure pulse is divided into positive pulse, negative pulse, and continuous wave. The positive pulse transmission system with the mechanical structure of the lifting valve is widely used because of its high pulse signal strength and long propagation distance, which can be used in deep wells. With the increase of the information measured in the formation, the lifting valve can not meet the needs of the current information transmission due to the linear motion of the mechanical structure and the low transmission rate. The rotary valve as the pressure signal generation source can improve the pulse generation rate. Therefore, this paper analyzes the working principle and signal generation principle of the rotary valve positive pulse system, and collects the directional data and natural gamma value of the field test.
Long-term rolling prediction of transformer power load capacity based on the informer model
Authors: Yang Chuan , Shu Zhibing 
Published: June 2024

Abstract
There are currently no methods capable of long-term forecasting based on very long-term real-world data. Any false prediction may damage the electrical transformer. For this problem, a transformer power load based on the Informer model is used as a method of long-term rolling forecasting. This method uses the self-attention distillation mechanism in the Informer model to allow the decoder of each layer to shorten the length of the input sequence by half, thus greatly saving the encoder memory overhead, and this paper adds a rolling long-term prediction function, making the prediction decoding time extremely short. Taking the power load data of a certain province in China as a test case, the improved model Informer* was compared with the traditional Informer model. The results show that the prediction accuracy of the Informer* model is higher and the load prediction accuracy is effectively improved.
Research on Low Voltage Ride-through Characteristics of 300 MW VSPSH Based on BPA
Authors: Wang Yingwei , Wen Luo , Fan Yubin , Zhang Shunren , Zhang Guangqing , Gong Wenjun 
Published: June 2024

Abstract
With the development of new energy, the power grid scale is constantly expanding, which also brings new challenges to the stability of the grid. When some faults occur in the power grid, it leads to a voltage dip; if most of the devices are removed from the power system, it is easy to cause problems of stability and losses. Therefore, it is necessary to investigate the low voltage ride-through (LVRT) characteristics of power electronic equipment with large capacity before grid connection. Different from constant-speed pumped-storage hydropower plants (CSPSH), variable-speed pumped-storage hydropower (VSPSH) units have broad prospects for development in China due to their characteristics of frequency and voltage regulation, energy saving, and high efficiency. In this paper, the three-machine-nine-node model of 300 MW VSPSH is built based on BPA, and the large voltage dip caused by a three-phase short-circuit fault at the grid side is designed to test the LVRT capability of 300 MW doubly fed VSPSH.
Engineering optics and thermodynamics design of parabolic trough solar collector
Authors: Yin Hang , Sun Yujun , Zhang Ji , Che Sheng , Zhang Xiaolei , Xing Yuepeng 
Published: June 2024

Abstract
The development and design of parabolic trough solar thermal collectors (PTC) need to comprehensively consider the influence of optic, thermodynamic, layout, and other factors. The optics and thermodynamic analysis of PTC with different configurations was carried out, and the influence of layout on heat collection was studied. In the case of determined PTC aperture size, the distribution trend of solar irradiation flux density of different HCE diameters is the same, and the peak value of solar irradiation flux density is higher when the concentration ratio is larger. For the PTC with the same concentration ratio, with the incidence angle increase, the intercept rate and optical efficiency of the PTC decrease, the thermal energy loss rate increases, and the thermal efficiency decreases. Under the same incidence angle, with the increase of concentration ratio, the PTC’s intercept rate and optical efficiency decrease gradually, and the average efficiency of the PTC increases first and then decreases. In the process of PTC design and selection, considering the concentration ratio, latitude, and cost factors, the aperture size of 8.2 m and the HCE of the inner diameter of 90 mm can be used as the recommended configuration scheme for subsequent HCE development.
Thermal performance analysis of horseshoe crab shaped fin cold plate
Authors: Bai Yike , Yang Xinglin , Lu Lin 
Published: June 2024

Abstract
As we all know, efficient, safe, and stable operation of lithium-ion batteries is the key to ensuring vehicle performance. This type of battery can create a good amount of heat during the driving process of a car. Poor heat dissipation conditions accumulate heat, causing the battery to generate more heat, which leads to a very bad impact. More seriously, it can generate thermal runaway, seriously affecting the safe driving of the car. Therefore, designing an efficient heat dissipation structure is crucial for the safe use of batteries. This article focuses on the thermal performance analysis. In terms of heat dissipation structure design and optimization, a biomimetic horseshoe crab fin cooling plate structure is proposed. Finite element models of the module and cooling plate are established using Solidworks software, and CFD simulation is completed. Six cooling schemes under the flow direction of two cooling media are compared and analyzed with traditional rectangular fin cooling plates. The results showed that the cooling plate with horseshoe crab-shaped fins had better heat transfer performance, and the highest temperature of the battery module was lower.
Semi-submersible non-axial current generators based on improving current energy conversion efficiency
Authors: Wang Tian , Liu Yuhan , Li Mingxuan , Tang Jia , Li Wenbo 
Published: June 2024

Abstract
With the development and utilization of ocean current energy, how to improve the efficiency of ocean current energy utilization has become the focus of attention in many countries. In this paper, the optimal design of the structure of the ocean current generator is mainly used to improve the energy capture power and the conversion efficiency of the ocean current energy unit under the condition of low flow rate. The effect of peripheral fluid growth on the generator is analyzed using finite element analysis. The three-dimensional finite element model of the semi-submersible axial-current generator is established by using the ANSYS finite element method, and the calculation and analysis of the peripheral fairing are simplified. Through finite element calculation and analysis, the velocity cloud diagram and velocity linear vector diagram are obtained, respectively. The results show that the semi-submersible axial current generator has the ability to start and generate electricity at low velocity and can use the current resources for power supply in situ. Its application can maximize the current capture and greatly improve the utilization rate of current energy.
Icing characteristics of the superhydrophobic surface of gas turbine fairing
Authors: Wang Yanhua , Chen Haoran , Hu Zhanwei , Wang Zhongyi , Wang Meng 
Published: June 2024

Abstract
In order to investigate the mechanism underlying the impact of superhydrophobic surfaces on the icing and anti-icing characteristics of fairings, this study focuses on marine gas turbine fairings as the research subject and employs numerical simulation methods to examine how droplet diameter and impact velocity influence the icing characteristics of superhydrophobic surfaces on fairings. The findings reveal that larger droplet radii are more prone to freezing onto superhydrophobic surfaces, resulting in a more stable ice sheet formation. Moreover, higher droplet velocities facilitate easier freezing on superhydrophobic surfaces, leading to larger frozen areas, thicker ice sheets, and more pronounced ice peaks. Additionally, differences in impact angles prevent droplets from freezing.
A false trigger pulse elimination circuit for low-frequency energy harvesting active rectifiers
Authors: Zeng Ziyi , Li Chunlong , Huang Hui , Wu Jianhui , Liu Wentao , Wang Zhen 
Published: June 2024

Abstract
In this article, a false trigger pulse elimination circuit is proposed to be used for a low-frequency energy harvesting active rectifier. It is divided into two-stage circuits, each stage almost including a switching signal generation circuit, a switching inverter, and an inverter to eliminate false triggering pulses on the rising edge and falling edge respectively. There is an edge detection circuit in each switching signal generation circuit, generating a switching signal that controls the switching inverter’s on-off behavior. This allows the inverter to achieve inverter output voltage clamping by turning off its inverter function and turning it into a switch that is only turned on at the high or low level. At the same time, a thyristor delay element is used to determine and adjust the effective level time of the switching signal, which can reach over 150 μs, completely covering the rising or falling edge false trigger pulse so that no GΩ-level resistors are needed in the low-frequency field. The results show that the low-frequency false trigger pulse elimination circuit proposed in this article can better eliminate false trigger pulses on both rising and falling edges. It can also achieve on-chip integration, reduce the power consumption of the self-adaptive delay compensation loop, and enhance the stability of the circuit.
Energy scheduling method for island micro-grid system based on prediction model
Authors: Du Xiaoting 
Published: June 2024

Abstract
Renewable energy, due to its characteristics such as volatility and intermittency, brings difficulties to the energy scheduling of renewable energy power generation systems. The main way of island power generation is to use renewable energy power generation. This chapter proposes a hierarchical energy scheduling method based on the prediction model through the research on the energy scheduling method of the island microgrid system to realize the energy optimization between the microgrid sub-systems, to achieve the maximum consumption of renewable energy for power supply, and to reduce the power supply cost and improve user satisfaction. The effectiveness of this method in improving the energy supply-demand balance of the microgrid sub-systems is verified through experiments.
The command allocation of the combined fire and storage FM system considering the benefit optimization
Authors: Cheng Liwei , Hao Yongsheng 
Published: June 2024

Abstract
The proportion of new energy generation connected to the grid is increasing year by year, which brings challenges to the frequency stability of the power grid. More controllable thermal power units are gradually retrofitted with energy storage batteries for joint frequency regulation, which can better suppress the fluctuation of grid frequency. In this paper, the comprehensive benefit model of a fire-storage joint FM system is constructed, which contains FM cost and FM benefit. The optimized power value of fire-storage joint FM is calculated based on the optimization of historical data of FM command, and finally, the simulation is compared with the constant rate response strategy. The results show that the strategy of this paper increases the comprehensive benefit of fire-storage joint FM systems by 1.71%.