Dongyan Pan, Zili Xu, Jun Pan
Abstract.With the enhancement of environmental awareness in countries around the world, new energy vehicles, as a new type of green transportation mode, are receiving increasing attention. However, the safety issues of new energy vehicles, especially fire safety, have drawn extensive attention from all sectors of society. Compared with traditional fuel vehicles, the power systems and energy storage systems of new energy vehicles are more complex. In particular, battery packs are highly prone to causing fires under conditions such as high temperatures, overcharging, and short circuits. Once a fire …
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Xinyu Zhu, Jianyu Chu
Abstract.The low-altitude economy is developing rapidly, and UAV post-earthquake rescue is helpful to improve the emergency response ability of post-earthquake rescue. Due to road damage, complex terrain, and uncertainty of meteorological conditions, ground rescue in the post-earthquake disaster area often cannot carry out full coverage of the earthquake-stricken area with high efficiency, while UAV has the characteristics of flexibility, dynamic real-time information, and intelligence, which is conducive to the application of post-earthquake rescue. The low-altitude economy has become a worldwide …
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Xinyuan Pan
Abstract.In order to solve the problems of low operation reliability and high safety risk of old gas regulators,7471 in-service old gas regulators in Suining Branch of Sichuan Chuangang Gas Co., Ltd.were taken as the research object, and 287 were stratified sampled according to working years, using areas, pressure regulating ranges and brands. The reliability verification experiments of rubber diaphragms and springs were carried out.According to the national standard, the gas resistance, tensile properties, compression permanent deformation and spring accuracy grade (GB27790-2020) and test of rubber …
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Ke Tian, Yanyan Weng, Zhichen Yang, Zengcheng Yang
Abstract.This paper systematically reviews the latest progress in the research on the integration of Printed Circuit Heat Exchanger (PCHE) and Thermoelectric Generation (TEG) technology. With the increasingly prominent issue of energy shortage, the efficient utilization of the large amount of cold energy released during the gasification process of Liquefied Natural Gas (LNG) has become a research hotspot in the energy field. As a new type of compact heat exchanger, the Printed Circuit Heat Exchanger shows great application potential in the field of LNG gasification due to its advantages of compact …
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Yanyan Weng, Ke Tian, Zhichen Yang, Zengcheng Yang
Abstract.The Printed Circuit Heat Exchanger (PCHE), an emerging microchannel compact heat exchanger, demonstrates significant application potential in cutting-edge fields such as supercritical carbon dioxide (S-CO₂) Brayton cycles, liquefied natural gas (LNG) processing, nuclear energy, and aerospace, owing to its exceptional compactness, high efficiency, and capability to withstand high pressures and temperatures. This review aims to systematically outline the research context, core findings, and existing controversies in PCHE technology, while also prospecting future research directions. Firstly, …
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Jianli Huang, Huamei Yang
Abstract.Ring-opening reactions to support the formation of CO, CO2 and C1-C5 light hydrocarbons (C1-C5 LHs) is one important pathway in vapor-phase reactions during lignin pyrolysis. Syringyl structure is rich in primary volatile products generated from lignin pyrolysis, and inevitably involved in vapor-phase reactions. However, there is less available information to elucidate the mechanism of syringol pyrolysis. In this work, syringol was pyrolyzed in a tubular reactor at 550-950 oC (0.5s) and at 750 oC(0.1-4.2 s). Distributions of volatile products from syringol pyrolysis were quantified by online …
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Xin Yao, Jinghen Liao, Jing Sun, Lu Zhang, Jiaowu Cai
Abstract.Most fans on the market currently can only oscillate within a fixed angle range. This paper presents the design of an intelligent oscillating fan that can track and oscillate based on the number of people present. When only one person is present, the fan automatically tracks their position and oscillates within a 15°range. When multiple people are present, the fan oscillates between the two individuals furthest away. Testing has demonstrated that this oscillation strategy provides an excellent user experience and has significant practical value.
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Hongyong Guo, Zhiyu Zhou, Bingyue Han
Abstract.Drilling is a key link in oil and gas field development, and well wall stability is crucial to the success rate of drilling works and subsequent production.introducing the shear fracture trend (Ts) as an evaluation index, the effects of different geostress differentials, wellbore pressure,, and laminar structure on the stability of the well wall are investigated. The study shows that: as the ground stress difference decreases, the wellbore rupture risk decreases significantly, and the rupture pattern changes from a specific direction to a more uniform distribution; the minimum value of Ts …
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Yuxuan Li
Abstract.Based on the standard - model and multiphase flow model, numerical simulations were used to study the effects of inlet pressure, fluid components and different numbers of cascade stages on the energy dissipation efficiency of Tesla dissipation devices in high-pressure oil and gas pipelines. The simulation results show that: In the general pressure range of high-pressure oilfield recovery fluids, with the increase of inlet pressure, the single-stage Tesla energy dissipation device's energy dissipation efficiency with the increase of inlet pressure shows a gradual increase in the trend of inlet …
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Zhiyu Zhou, Hongyong Guo
Abstract.With the development of unconventional oil and gas resources, hydraulic fracturing technology has played a crucial role in the exploitation of shale gas, tight oil, and other reservoirs. The expansion morphology of fractures significantly impacts the fracturing effectiveness, and the geometric characteristics of the fractures are influenced by rock mechanical parameters and geological conditions. This study systematically investigates the effects of Young's modulus, Poisson's ratio, brittleness index, and horizontal stress difference on the fracture propagation path, width, and length in …
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Junyan Chen, Jiawang Chen, Yingmei Li
Abstract.The rapid proliferation of Generative Artificial Intelligence (GenAI) represents a paradigm shift in educational technology, presenting profound implications for language pedagogy. This paper provides a theoretical exploration of the dual-faceted impact of GenAI on International Chinese Language (ICL) education, with a specific focus on two integral components: cultural introduction and the cultivation of Intercultural Communicative Competence (ICC). Traditionally, these areas have been fraught with challenges, including reliance on static materials, the risk of essentialism, and limited …
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Kevin Wang
Abstract.Aseptic practice is a laboratory practice whose aim is to avoid microbial contamination whose potential can undermine experimental outcome, patient health status, and even thwart scientific progress. In this paper, we provide background on the history, procedure, and importance of aseptic practices against microbial contamination in laboratory practice. Based on observation on sterilization practice, the importance of personal protective equipment (PPE), environment control measures, and human factors in aseptic practice, we provide evidence for compliance with aseptic precautions. We …
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Zengcheng Yang, Zhichen Yang, Yanyan Weng, Ke Tian
Abstract.The submerged combustion vaporizer (SCV), as a critical equipment in the regasification process of liquefied natural gas (LNG), is widely used in LNG receiving terminals worldwide due to its significant advantages such as fast start-up, independence from ambient temperature, compact structure, and flexible load adjustment. This paper systematically reviews the research progress on the heat transfer characteristics of SCVs, with an in-depth analysis focusing on three core themes: icing behavior, fouling formation mechanisms and mitigation measures, as well as structural and operational …
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Chaoyang Xue, Qizhi Zhang, Xianfeng Shi
Abstract.This paper presents a design of a feedback-linearization sliding-mode controller for a high-order electro-hydraulic servo (EHS) system model. The nonlinear state-space model of the EHS, including the servo valve and hydraulic cylinder, is first derived. Known nonlinearities in this model are exactly canceled via feedback linearization, yielding an equivalent linear system. A sliding surface is then designed, and a robust sliding-mode control law is derived to handle model uncertainties and external disturbances. MATLAB/Simulink simulations compare the proposed control scheme with a …
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Baichuan Shi
Abstract.In the context of the integration of semiconductor technology and intelligent systems, embedded FPGA reconfigurable systems have become a key carrier for innovation in analog mixed signal integrated circuits (AMS ICs) and RF circuits due to their flexibility and high performance. This article takes a management perspective and focuses on the dynamic resource allocation challenges of such complex R&D projects. By constructing a three-dimensional analysis framework of "technical characteristics resource requirements configuration mechanism" and combining typical cases in the semiconductor …
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Ganggui Zhang, Yupeng Wu, Run Zhao
Abstract.This article provides a detailed introduction to the concept, formation process, regional division, and depositional characteristics of deep-water turbidite depositional systems. Turbidity currents are sediment gravity flows characterized by turbulence, which mainly occur in deep water areas below the wave base. The depositional system can be divided into three regions: upstream convergent channels, midstream deep-water channels, and downstream terminal fans. The upstream area is dominated by sand-rich sediments, but lacks effective sealing layers; the midstream area develops a single supply …
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Yihao Zhang
Abstract.As an important index of rock internal space characteristics, reservoir pore structure directly affects oil and gas storage capacity and seepage efficiency, and is a key factor in the exploration and development of unconventional oil and gas resources such as shale gas and tight oil. In recent years, with the advancement of unconventional oil and gas exploration to deep and ultra-deep layers, the study of reservoir pore structure has shown a development trend from qualitative analysis to quantitative characterization, from two-dimensional observation to three-dimensional reconstruction, and …
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Run Zhao, Ganggui Zhang, Yupeng Wu
Abstract.As an important marine sedimentary geomorphic unit, the spatial distribution characteristics of tidal sand ridges hold significant guiding significance for oil and gas resource exploration and coastal zone management. This study systematically sorts out the morphological characteristics, sedimentary structures, and formation-evolution mechanisms of typical tidal sand ridges at home and abroad. Through comparative analysis, it is found that relevant research mainly focuses on two aspects: the statistical characterization parameters and sedimentary facies division of continental shelf sand …
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Weidong Zhang, Guanyu Zhu, Jiajun Tang
Abstract.The influence of seven factors, including shear span ratio, reinforcement grade, reinforcement diameter, reinforcement spacing, section width, section height, and concrete strength, on the shear bearing capacity of Ultra high performance concrete with coarse aggregate (UHPC-CA) beams containing high-strength steel bars was analyzed using orthogonal experimental method. The results show that the influence of various factors on the shear bearing capacity of high-strength steel reinforced UHPC-CA beams, from large to small, is in the order of section width>concrete strength>shear span …
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Yuwei Wu, Peitong Liu, Lin Dai, Xiaoling Wei, Donglong Wu
Abstract.With the in-depth transformation of the new energy vehicle industry towards "electrification and intelligence", wireless charging, as a key technology to address the inconvenience of traditional charging, has seen its patent layout and patent pool operation gradually become the core of industrial competition. This paper takes typical global wireless charging patent pools (with the EV Charging Patent Pool under Via Licensing Alliance (Via LA) as the core research object) as samples, and combines data from the AutoPat global automotive patent big data platform (as of December 2024). It …
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Longxiang Cao
Abstract.With the continuous growth of global energy demand and the depletion of conventional oil and gas resources, enhanced oil recovery ( EOR ) technology has become the core direction to ensure energy security and achieve sustainable development of oil fields. This paper systematically reviews the mainstream EOR methods such as chemical flooding, gas flooding, thermal oil recovery, microbial oil recovery, micro-nano technology and improved water flooding, and analyzes them from four aspects : action principle, development process, application cases and limitations. Combined with the current …
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Shen Zhang, Chen Tang, Huiru Zheng
Abstract.Journal of Jilin University (Engineering Edition) (Journal A), Journal of Jilin University (Science Edition) (Journal B), Journal of Northeast Normal University (Natural Science Edition) (Journal C) and Journal of Yanbian University (Natural Science Edition) (Journal D) were taken as research objects, the basic information of journals was introduced, the trend of publication, the proportion of funded articles, the distribution of disciplines, relevant institutions and related keywords in the journals from 2020 to 2024 were analyzed. The results show that with the increase of years, the …
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Lei Guo, Zhiyu Lin
Abstract.With the rapid advancement of artificial intelligence, micro-expression recognition has demonstrated significant application value in fields such as criminal investigation and lie detection. However, the extremely short duration of micro-expressions and the scarcity of annotated data pose substantial challenges to accurate recognition. This study proposes a two-stage micro-expression recognition method based on an improved YOLOv8 and ResNet framework. In the first stage, a YOLOv8 model enhanced with StarNet multi-scale feature fusion and the CBAM attention mechanism is employed to achieve …
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Zhiyu Lin, Lei Guo
Abstract.Early and accurate diagnosis of brain tumors plays a critical role in improving patient prognosis. Magnetic Resonance Imaging (MRI) serves as the core diagnostic modality; however, the inherent heterogeneity of brain tumors and the complexity of their morphological boundaries pose significant challenges for traditional segmentation methods, limiting their clinical applicability. To address this issue, we propose the TransDeepLab model, aiming to develop an efficient and precise brain tumor segmentation algorithm. The model integrates DeepLabV1 and Vision Transformer (ViT) within an …
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Yihan Hu
Abstract.In order to solve the problems of insufficient generalisation ability and poor interpretability of evaluation results in the complex geological environment of the current data-driven overflow risk assessment model, this paper proposes a quantitative overflow risk assessment method based on the combination of CNN-LSTM data-driven model and fuzzy reasoning system. The data features were extracted, the overflow risk was predicted, the fuzzy comprehensive evaluation method was further adopted, the membership function was generated based on the normal distribution fitting historical data, the risk …
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Dalong Zhang
Abstract.In response to the increasing proportion of low-porosity, low-permeability, and tight sandstone reservoirs in current oil and gas exploration, this paper conducts a systematic study on diagenetic facies division. First, the development stages and existing problems of diagenetic facies research are reviewed, with an emphasis on the objective of establishing a scientific classification system. The study highlights the core criteria for facies division, including types and intensities of diagenesis, petrographic characteristics, pore and petrophysical features, as well as logging responses and …
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Zekai Mo
Abstract.With the deepening global adoption of sustainable development, environmental, social, and governance (ESG) considerations have become core dimensions for measuring a company's overall value. The rapid evolution of Fintech offers new avenues for companies to overcome bottlenecks in ESG practice. This article explores the inherent connection between Fintech innovation and corporate ESG practices. Through literature analysis and logical deduction, it identifies pain points in corporate ESG practices, such as irregular data collection, opaque information disclosure, and inefficient performance …
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Yifei Yang, Zongxing Yuan
Abstract.Drilling technology is one of the core means of geological engineering exploration. This article systematically reviews the commonly used technical methods in geological engineering exploration, such as rotary drilling, impulse drilling, vibratory drilling, hydraulic rotary drilling, and pneumatic drilling. It focuses on analyzing the principles, characteristics, applicable conditions, and existing problems of each type of drilling technology. On this basis, the application status of drilling technology in geotechnical engineering investigation, hydrogeological investigation, mineral resource …
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