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13th International Field Exploration and development Conference, IFEdC 2023

作者： Lin, Xia Xu, Chao Mi, Lan Liu, Zong-Shang Xiang, Chong Liu, Li-Xia PetroChina Research Institute of Petroleum Exploration and Development Beijing China Artificial Intelligence Technology R&D Center for Exploration and Development CNPC Beijing China

ISBN: (纸本)9789819702718

As an efficient and intelligent means of knowledge organization, knowledge graph has become the core force driving the development of artificial intelligence. Hydraulic fracturing is an important measure for increasing production and injection in oil and gas fields, with complex design processes and numerous influencing factors. In order to achieve rapid and accurate optimization of fracturing plan, this paper proposes a method for optimizing fracturing plan based on knowledge graph. By combing the system of fracturing domain knowledge, fracturing knowledge graph is constructed. Extracting characteristic parameters describing the geological engineering double sweet spot in multiple dimensions and multiple scales, and showing the characteristic parameter-related entities, relationships, and attributes as vectors via graph embedding technique. Integrate expert knowledge with artificial intelligence to build a fracturing effect prediction model and optimize the fracturing plan. In this study, more than 500 fracturing oil wells in a tight sandstone block are taken as objects to build a knowledge graph. Based on well test and production test data and historical production, this study predicts the fracturing stimulation effect and optimizes the fracturing engineering parameters. The calculation results indicate that factors such as reservoir thickness, oil saturation, number of fracture clusters, and half length of fractures have a significant impact on the fracturing effect. The coincidence rate between the predicted capacity of production and the actual capacity of production is over 91%, and the efficiency of fracturing plan design is increased by more than 20 times. The research results can provide scientific basis for predicting fracturing effects and optimizing fracturing engineering parameters, greatly improving the efficiency and quality of fracturing design, and improving the success rate of fracturing construction. © The Author(s), under exclusive license to Spr

关键词： Forecasting

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MoS_(2) nanoflowers and PEdOT:PSS nanocomposite enabling wearable dual-mode pressure sensors

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Science China(Technological Sciences) 2024年第6期67卷 1737-1747页

作者： WANG FengMing YANG WeiJia MA Ke SHEN GengZhe SU daoJian LI BaiJun WANG ShuangPeng QIN BoLong ZHANG Chi XIN Yue CAO XiaoBing HE Xin School of Applied Physics and Materials Wuyi UniversityJiangmen529020China Biomaterials R&D Center Zhuhai Institute of Advanced TechnologyChinese Academy of SciencesZhuhai519003China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao999078China

A versatile sensing platform employing inorganic MoS_(2) nanoflowers and organic poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate)(PEdOT:PSS)has been investigated to develop the resistive and capacitive force-sensitive *** microstructure of the sensing layer heightens the sensitivity and response time of the dual-mode pressure sensors by augmenting electron pathways and inner stress in response to mechanical ***,the capacitive and resistive sensors exhibit sensitivities of 0.37 and 0.12 kPa^(-1),respectively,while demonstrating a remarkable response time of approximately 100 ***,it is noteworthy that the PEdOT:PSS layer exhibits excellent adhesion to polydimethylsiloxane(PdMS)substrates,which contributes to the development of highly robust force-sensitive sensors capable of enduring more than 10000loading/unloading *** combination of MoS_(2)/PEdOT:PSS layers in these dual-mode sensors has shown promising results in detecting human joint movements and subtle physiological ***,the sensors have achieved a remarkable precision rate of 98%in identifying target *** outcomes underscore the significant potential of these sensors for integration into applications such as electronic skin and human-machine interaction.

关键词： MoS_(2)/PEdOT:PSS nanocomposite force-sensitive sensor multi-scaled microstructure physiological signals monitoring object grasping recognition

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A Quantitative Characterization of the Crack driving Force of the Popcorn-type Failure in Mold-Underfilled Package under Hygro-thermo-vapor Loads by Finite Element Based Fracture Mechanics 26

A Quantitative Characterization of the Crack Driving Force o...

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26th Electronics Packaging technology Conference, EPTC 2024

作者： Lyu, Guang-Chao Luo, Ming-Sheng Zhang, Xin-Ping School of Materials Science and Engineering Guangdong Provincial Engineering Technology R&D Center of Electronic Packaging Materials and Reliability South China University of Technology Guangzhou510640 China

ISBN: (纸本)9798331522001

This study investigates the combined effects of hygroscopic expansion, thermal expansion and vapor pressure on the reliability of molded underfill flip-chip (MUF FC) packages using finite element analysis. The moisture concentration distributions during MSL 1 preconditioning and the reflow process were first determined. Moisture diffusion under varying temperature conditions during reflow was simulated using the internal source approach. Fracture behavior at the MUF/die interface, specifically at the interface crack tip and the die corner, was analyzed for different crack lengths based on fracture mechanics. It has been found that vapor pressure loading becomes the dominant driving force for interfacial crack propagation and deflection at the die corner when the crack extends to a certain extent. Under vapor pressure loading, the Mode I driving force is predominant at the interface crack tip, while under moisture and thermal loads, the crack driving force is influenced by both Mode I and Mode II components. In addition, the direction of crack deflection at the die corner, which is predicted using the maximum tangential stress (MTS) criterion under the vapor pressure loading condition, is significantly different from that under moisture and thermal loads. In practical engineering, the cracking angle can serve as a key factor in analyzing the primary types of loads that lead to structural damage and device failure. The conclusions derived from the study enhance the understanding of popcorn failure mechanisms in electronic packages and provide valuable insights for research related to integrated circuit (IC) reliability. © 2024 IEEE.

关键词： Crack tips

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A Comprehensive Simulation Study on Cu Trace damage and Cu/Polyimide Interface delamination of rdLs in Fan-out Wafer Level Package Under Hygro-thermo-mechanical Loads 26

A Comprehensive Simulation Study on Cu Trace Damage and Cu/P...

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26th Electronics Packaging technology Conference, EPTC 2024

作者： Luo, Ming-Sheng Lyu, Guang-Chao deng, Jia-Wei Zhang, Xin-Ping School of Materials Science and Engineering Guangdong Provincial Engineering Technology R&D Center of Electronic Packaging Materials and Reliability South China University of Technology Guangzhou510640 China

ISBN: (纸本)9798331522001

The current study investigates the influence of moisture on the delamination of Cu/Polyimide (PI) interfaces and cracking of Cu traces within the redistribution layers (rdLs) of fan-out wafer level packages (FOWLPs) containing two dies during the reflow process, utilizing finite element simulation. The crack initiation and the delamination behavior of Cu/PI interfaces are analyzed using the cohesive zone model (CZM) based on interface fracture mechanics. The influences of the number of rdL layers and thickness of Cu traces on interface damage and trace stress concentration are also studied. The findings indicate that crack formation and delamination of interfaces are most likely to occur at the edge of the interface between the top layer of Cu trace and the polyimide in die-to-die (d2d) region. The presence of hygro-swelling stress exacerbates interfacial damage. Moreover, the degradation of the Cu/PI interface intensifies with an increase in the number of rdL layers. While Cu trace is prone to stress concentration at the junction with the pad, the impact of moisture on Cu trace stress at 260 °C is relatively small. © 2024 IEEE.

关键词： delamination

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Construction of the proprietary model of metro intelligent customer service based on open source large language model 4

Construction of the proprietary model of metro intelligent c...

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2024 4th International Conference on Intelligent Traffic Systems and Smart City, ITSSC 2024

作者： Lin, Tianzhen Liu, Hengyu Wang, Cui Yang, Huimin R&D Center Qingdao Bonin Fortune Intelligent Transportation Technology Development Co. Ltd. Qingdao266111 China

ISBN: (纸本)9781510686304

The growth of passenger flow in Qingdao Metro has led to the rise of customer service demand. The existing customer service system is constructed based on NLP and knowledge graph, which has the problems of inaccurate understanding of questions, low correlation of answers, and low passenger satisfaction. With the development of large language model technology, customized large language models combined with domain-specific knowledge are increasingly applied to practical application scenarios. After comparing the mainstream open-source large language models, this paper selects Qwen2-7B model as the base model, combines the special knowledge of Qingdao Metro customer service field, generates the Qingdao Metro special customer service model through pre-training and fine-tuning, and develops the Qingdao Metro intelligent customer service agent by means of retrieval-augmented generation and prompt engineering. The evaluation test shows that the score of the model reaches 87 points, which is greater than the 80 points of the Qwen2-7B general model and the 45 points of the existing customer service system. Compared with the original customer service system of Qingdao Metro, the answer accuracy of the model is increased by 38%, and the answer accuracy is increased by 16% compared with the general model. The proprietary large language model of metro intelligent customer service based on open source large language model can effectively solve passenger problems and improve passenger satisfaction. © 2025 SPIE.

关键词： Sales

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Crack Initiation and Propagation Mechanism of rapidly Tempered High-Si Steel during Hydrogen Embrittlement

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第2期111卷 21-31页

作者： Sunako, Manami Mizumoto, Masataka Tanaka, ren Kumai, Shintaro Yamauchi, Yuichiro Ooi, Azusa Tada, Eiji R&D Div. NHK Spring Co. Ltd. Japan Laboratory for Future Interdisciplinary Research of Science and Technology Institute of Integrated Research Institute of Science Tokyo Japan Dept. Materials Science and Engineering School of Materials and Chemical Technology Institute of Science Tokyo Japan

In this study, we focused on fine dispersion of Fe2-3C(Ε) by combining the addition of Si and rapid tempering to improve the hydrogen embrittlement resistance of high-strength spring steels. The aim of this study is to clarify the fracture mechanism of rapidly tempered high-Si steels: the JISSUP7 (2.0Si) and SAE9254 (1.4Si) spring steels were tempered at different tempering rates by induction (IH) and furnace heating (FH) methods. Bending test were carried out during the cathodic hydrogen charging to observe the fracture origin and morphology of the steels. The size and volume of carbides were quantified using small-angle X-ray scattering method (SAXS) and synchrotron radiation Xrd. The distribution of carbides was observed with the replica method: facets were observed at the fracture origin of the 2.0Si-IH steel and 1.4Si-IH steel, which contained retained γ in the microstructure. It was considered that the facets formed because retained γ at the grain boundaries transformed into martensite during hydrogen embrittlement, promoting intergranular cracking;the 2.0Si-IH steel contained the largest amount of retained γ, but also contained fine Fe2-3C(Ε) in the lath. This suggests that dislocations and hydrogen are less likely to accumulate at the grain boundaries, resulting in the longest fracture life. In other words, in rapidly tempered high Si steels (2.0Si-IH steels), the fine dispersion of Fe2-3C(Ε) has more influence on the suppression of crack initiation and propagation than the increase in the amount of retained γ, and this contributes significantly to the fracture life. © 2025 The Iron and Steel Institute of Japan.

关键词： Hydrogen embrittlement

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Carbon compounds, internal stress and hydrogen permeability in carbon-doped TiZrN coatings by laser ablation

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Ceramics International 2025年第16期51卷 21987-21995页

作者： Kim, Seonghoon Hong, Eunpyo Choi, Young-kyu Lee, Seahoon Lee, Youngjae Choi, Yongsup Lee, Heesoo Extreme Materials Research Institute Korea Institute of Materials Science Changwon51508 Korea Republic of Mechanical & Material Technology Center Korea Testing Laboratory Jinju52852 Korea Republic of Research Institute of Sustainable Development Technology Low-Carbon Emission Control R&D Department Korea Institute of Industrial Technology Cheonan31056 Korea Republic of Institute of Plasma Technology Korea Institute of Fusion Energy Gunsan54004 Korea Republic of School of Materials Science and Engineering Pusan National University Busan46241 Korea Republic of

Internal stress has emerged as a crucial factor in determining the lifetime of hydrogen permeation barrier coatings, as it influences the hydrogen isotope diffusion and crack propagation. Here, we fabricated carbon-doped TiZrN coatings under different laser outputs, and investigated the changes in hydrogen permeability due to carbon compound formation and internal stress induced by laser shock peening. Based on ToF-SIMS, the carbon penetration depth in the coating was confirmed to be up to 500 nm, depending on the laser output. Using XPS and raman analysis, it was confirmed that doped carbon substituted nitrogen sites in TiZrN, forming TiC and ZrC, and increasing carbide content from 4.1 % to 7.4 %. Notably, as the laser output increased from 30 % to 40 %, the sp2/sp3 ratio rose from 1.33 to 2.67, and the Id/IG ratio increased from 0.81 to 1.33, indicating the formation of an amorphous carbon-embedded (Ti, Zr)(C, N) structure. This was complemented by the transformation of the TEM-SAEd pattern from dot patterns to ring patterns. The internal stress in carbon-doped TiZrN coatings increased from 4.323 GPa before carburization to a maximum of 5.620 GPa. The increase in residual compressive stress led to a reduction in hydrogen permeability by up to 69 %, 57 %, and 24 % at 573 K, 673 K, and 773 K, respectively. This study advances the understanding of carbon compound formation and internal stress changes in TiZrN coatings under different laser output. It demonstrates that the formation of residual compressive stress due to laser shock peening significantly influences the hydrogen permeability by inhibiting hydrogen isotope diffusion and crack propagation within the coating. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Laser ablation

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Multi-stage decoupling Preconditioning Solution technology for Large-Scale reservoir Simulation 13th

Multi-stage Decoupling Preconditioning Solution Technology f...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Li, Ning Research Institute of Petroleum Exploration and Development PetroChina Beijing China Artificial Intelligence Technology R&D Center for Exploration and Development CNPC Beijing100083 China

ISBN: (纸本)9789819702633

In response to the complex seepage mechanism of unconventional oil and gas reservoirs, large-scale volume fracturing of multi-segment and multi-cluster horizontal wells, and differences in oil and gas pressure and saturation properties, which result in uneven distribution of eigenvalues, large value of conditions, and slow solving speed of nonlinear equation matrix, a multi-stage decoupling preconditioning solution technology was carried out on the Jacobian coefficient matrix of the oil and gas numerical discrete equation based on the implicit pressure explicit saturation method (IMPES) processing idea. Multi-grid method (AMG) + block based incomplete LU decomposition method (BILU0) are used to preprocess the Jacobian coefficient matrix in multiple stages, and the block based generalized minimum residual method (BGMrES) is used to solve the preconditioned nonlinear algebraic equations. The calculation result proves that compared with other single processing methods, this method effectively reduces the number of iterations for solving discrete equations while ensuring calculation accuracy, improves calculation speed, and has important application value for rapid formulation and decision-making optimization of oil and gas field development plans. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Nonlinear equations

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Ontology Construction technology of Knowledge Graph in Oil and Gas Exploration and development 13th

Ontology Construction Technology of Knowledge Graph in Oil a...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Li, Ning ren, Liang Liu, Zong-Shang ren, Shu-Hang Xiang, Chong Wu, Bo-Yu Cai, Xuan Research Institute of Petroleum Exploration and Development PetroChina Beijing China Artificial Intelligence Technology R&D Center for Exploration and Development CNPC Beijing100083 China

ISBN: (纸本)9789819702718

With the gradual application of knowledge atlas technology in oil and gas exploration and development fields such as intelligent evaluation of oil and gas reservoir and intelligent identification of oil and gas reservoir through logging, the application of knowledge Atlas in oil and gas industry has attracted more and more attention. In view of the problem of knowledge expression and application in E&P sector field, a professional word bank of E&P was established based on web crawler technology, a feature corpus of E&P field was established by extracting E&P sector related achievement documents and literature data, and the principle of E&P knowledge graph ontology construction was formulated and the construction process was defined. The multistage classification system of oil and gas exploration and development knowledge atlas ontology is described and constructed from multiple dimensions such as sector, object and feature, and the knowledge atlas ontology model of oil and gas exploration and development sector domain is formed, which lays a foundation for the in-depth application of knowledge atlas technology in petroleum exploration and development. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Ontology

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Built-in electric field induced by defected carbons adjacent to graphitic nitrogen valley for efficient oxygen reduction reaction and zinc-air batteries

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Journal of Energy Chemistry 2025年第4期103卷 813-825页

作者： Na Li Tingting Ma Huihui Wang Jiayi Li dingrong Qiu Zhen Meng Jiangdu Huang Lijun Sui Faming Han Huidan Lu Yongping Liu Sundaram Chandrasekaran Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional MaterialsCollege of Chemistry and BioengineeringGuilin University of TechnologyGuilin 541004GuangxiChina Guangxi Colleges and Universities Key Laboratory of Surface and Interface Electrochemistry College of Chemistry and BioengineeringGuilin University of TechnologyGuilin 541004GuangxiChina Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials Institute of New Energy for VehiclesSchool of Materials Science and EngineeringTongji UniversityShanghai 201804China

rational design of defected carbons adjacent to nitrogen(N)dopants is a fascinating but challenging approach for enhancing the catalytic performance of N-doped ***,the combined effect of heteroatom doping and defect engineering can efficiently increase the oxygen reduction reaction(Orr)ability of inactive carbons through charge ***,we report that an enhanced built-in electric field caused by the combined effect of N-doping and carbon defects in the twodimensional(2d)mesoporous N-doped carbon nano flakes(NCNF)is a promising technique for improving Orr *** a result,the NCNF exhibits more promising Orr activity than Pt/C and similar performance with reported robust *** experimental and theoretical investigations suggest that topologically defected carbon adjacent to the graphitic valley nitrogen is a real active site,rendering optimal energy for the adsorption of Orr intermediates and lowering the total energy barrier for ***,NCNF-based Zn-air batteries exhibited an excellent power density and specific capacity of~121.10 mW cm^(-2)and~679.86 mA h g_(Zn)^(-1),*** study not only offers new insights into defected carbons with graphitic valley N for Orr but also proposes novel catalyst design principles and provides a solid grasp of the built-in electric field effect on the Orr performance of defective catalysts.

关键词： defective carbon Built-in electric field Graphitic valley nitrogen-doped carbon defects Oxygen reduction reaction Zn-air batteries

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