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A systematic review of machine learning modeling processes and applications in ROP prediction in the past decade

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Petroleum Science 2024年第5期21卷 3496-3516页

作者： Qian Li jun-ping Li Lan-Lan Xie College of Environment and Civil Engineering Chengdu University of TechnologyChengdu610059SichuanChina State Key Laboratory of Geohazard Prevention and Geoenvironment Protection(Chengdu University of Technology) Chengdu610059SichuanChina Institute of Exploration Technology CAGSChengdu610059SichuanChina

Fossil fuels are undoubtedly important, and drilling technology plays an important role in realizing fossil fuel exploration;therefore, the prediction and evaluation of drilling efficiency is a key research goal in the industry. Limited by the unknown geological environment and complex operating procedures, the prediction and evaluation of drilling efficiency were very difficult before the introduction of machine learning algorithms. This review statistically analyses rate of penetration(ROP) prediction models established based on machine learning algorithms;establishes an overall framework including data collection, data preprocessing, model establishment, and accuracy evaluation;and compares the effectiveness of different algorithms in each link of the process. This review also compares the prediction accuracy of different machine learning models and traditional models commonly used in this field and demonstrates that machine learning models are the most effective technical means in current ROP prediction modeling.

关键词： Drilling Rate of penetration(ROP)prediction Machine learning Accuracy evaluation

Xiaotan Sanjie decoction inhibits interleukin-8-induced metastatic potency in gastric cancer

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World Journal of Gastroenterology 2015年第5期21卷 1479-1487页

作者： jun Shi Pin-kang Wei Department of Traditional Chinese Medicine Shanghai Changzheng HospitalThe Second Military Medical University

AIM:To investigate the interaction between Xiaotan Sanjie(XTSJ) decoction and interleukin-8(IL-8) and its effect on adhesion,migration and invasion of SGC-7901 gastric cancer ***:SGC-7901 gastric cancer cells were exposed to serum containing XTSJ decoction and/orIL-8(1 ng/m L).SGC-7901 cell adhesion to fibronectin,an extracellular matrix component,was detected using the Cell Counting *** and invasion abilities of SGC-7901 cells were detected by scratch wound and Transwell chamber ***,protein(immunofluorescence and Western blot) and m RNA levels(quantitative polymerase chain reaction) of cluster of differentiation 44(CD44),a cell adhesion molecule,were measured in 72-h-cultured SGC-7901 ***:Cell adhesion was promoted by IL-8(P = 0.001),but was inhibited by XTSJ decoction(P = 0.0001).Similarly,IL-8 promoted SGC-7901 cell invasion(P = 0.003),and XTSJ decoction inhibited cell invasion(P = 0.001).IL-8 induced SGC-7901 cell migration,but this was inhibited by XTSJ ***-8 up-regulated CD44 protein(P = 0.028) and m RNA expression(P = 0.002),whereas XTSJ decoction inhibited CD44 protein expression(P = 0.0001),but not m RNA expression(P = 0.275).An interaction between XTSJ decoction and IL-8 was confirmed in the invasion(P = 0.001) and CD44 m RNA expression of SGC-7901 cells(P = 0.010),but not in cell adhesion(P = 0.051).CONCLUSION:XTSJ decoction may inhibit adhesion,migration and invasion of gastric cancer cells,which is partly associated with down-regulation of IL-8.

关键词： Xiaotan Sanjie decoction Interleukin-8 Migration A

Recent developments of emerging inorganic, metal and carbon- based nanomaterials for pressure sensors and their healthcare monitoring applications

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Nano Research 2021年第9期14卷 3096-3111页

作者： Kyowon kang Jaejin Park Kiho Kim Ki jun Yu School of Electrical and Electronic Engineering YU-KIST InstituteYonsei UniversitySeoul 03722Republic of Korea

Recently,flexible pressure sensors have gained substantial research interest in bioelectronics because they can monitor the conditions of various organs,enable early diagnosis of diseases,and provide precise medical treatment by applying them to various parts of the *** particular,inorganic materials,metal and carbon-based materials are broadly used in novel structured pressure sensors from wearable devices to implantable *** the excellent electronic properties,distinctive morphologies,and remarkable mechanical and chemical stability of these materials,it is expected that these flexible pressure sensors can be the basis for new methods for human *** article covers an extensive review of the inorganic,metal and carbon-based flexible pressure sensor design strategies and sensing mechanisms studied in recent years for diverse applications such as tactile sensors,arterial pulse sensors,intracranial pressure sensors,intraocular pressure sensors,and bladder pressure *** section provides an overview by introducing the recent progress in flexible pressure sensors.

关键词： nanomaterial inorganic carbon pressure sensor wearable device implantable device

Two Improvements on Numerical Simulation of 2-DOF Vortex-Induced Vibration with Low Mass Ratio

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China Ocean Engineering 2017年第6期31卷 764-772页

作者： kang Zhuang NI Wen-chi ZHANG Xu SUN Li-ping Deepwater Engineering Research Center Harbin Engineering University Harbin 150001 China

Till now, there have been lots of researches on numerical simulation of vortex-induced vibration. Acceptable results have been obtained for fixed cylinders with low Reynolds number. However, for responses of 2-DOF vortex-induced vibration with low mass ratio, the accuracy is not satisfactory, especially for the maximum amplitudes. In Jauvtis and Williamson＇s work, the maximum amplitude of the cylinder with low mass ratio m＊=2.6 can reach as large as 1.5D to be called as the ＂super-upper branch＂, but from current literatures, few simulation results can achieve such value, even fail to capture the upper branch. Besides, it is found that the amplitude decays too fast in the lower branch with the RANS-based turbulence model. The reason is likely to be the defects of the turbulence model itself in the prediction of unsteady separated flows as well as the unreasonable setting of the numerical simulation parameters. Aiming at above issues, a modified turbulence model is proposed in this paper, and the effect of the acceleration of flow field on the response of vortex-induced vibration is studied based on OpenFOAM. By analyzing the responses of amplitude, phase and trajectory, frequency and vortex mode, it is proved that the vortex-induced vibration can be predicted accurately with the modified turbulence model under appropriate flow field acceleration.

关键词： 2-DOF vortex-induced vibration numerical simulation modified turbulence model acceleration

Strong interface contact between NaYF_(4):Yb,Er and CdS promoting photocatalytic hydrogen evolution of NaYF_(4):Yb,Er/CdS composites

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Journal of Materials Science & Technology 2022年第7期102卷 1-1,2-7页

作者： Huaze Zhu Yongqiang Yang Yuyang kang ping Niu Xiangdong kang Zhiqing Yang Hengqiang Ye Gang Liu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Metallurgy Northeastern UniversityShenyang 110819China Jihua Laboratory Foshan 528000China

To acquire efficient photocatalysts,it is necessary to make effective use of visible light/Near Infrared(NIR)light,which takes up a large percentage of *** upconversion materials with visible light active photocatalysts has attracted much attention in this *** interface contact between upcon-version material and photocatalyst has potential influence on the properties and thus the performance of the *** this work,NaYF_(4):Yb,Er/CdS composites of the upconversion material NaYF_(4):Yb,Er nanorods and CdS nanoparticles were synthesized by ion adsorption/precipitation process and were then annealed in an argon atmosphere at different temperatures to modulate the *** annealing pro-cess endows the crystal transformation of cubic CdS with low crystallinity to hexagonal CdS with high crystallinity and,importantly,good interface contact between NaYF_(4):Yb,Er and ***,the hy-drogen evolution activity greatly increases from 171 to 2539μmol h^(−1) g^(−1) under the light irradiation ofλ>400 nm,and from 0 to 19μmol h^(−1) g^(−1) under the light irradiation ofλ>600 *** work might provide a useful reference for the rational design of promising photocatalyst involving upconversion ma-terials.

关键词： NaYF_(4):Yb Er CdS Upconversion Photocatalytic Composite

Heat treatment effect on structural evolution and hydrogen sorption properties of Y_(0.5)La_(0.2)Mg_(0.3-x)Ni_(2) compound

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Rare Metals 2023年第6期42卷 1813-1820页

作者： Hao Shen Li-jun Jiang ping Li Hui-ping Yuan Zhi-Nian Li jun-Xian Zhang National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing100088China Institute for Advanced Materials and Technology University of Science and TechnologyBeijing100083China CNRS ICMPEUMR 7182Univ Paris Est CreteilThiais94320France GRIMAT Engineering Institute Co. Ltd.Beijing101407China

The effect of heat treatment on phase occurrence,crystal structures and hydrogen sorption properties of Y_(0.5)La_(0.2)Mg_(0.3-x)Ni_(2) compounds has been *** targeted compounds were synthesized through induction melting and processed heat treatment at 700 and 900℃,*** occurrence and structural properties were studied by X-ray powder diffraction(XRD).The global compositions and phase compositions have been determined by inductively coupled plasma-optical emission spectrometer(ICP-AES) and electron probe microanalysis(EPMA) respectively.

关键词： hydrogen treatment structural

Advances and challenges in DFT-based energy materials design

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Chinese Physics B 2022年第10期31卷 34-52页

作者： jun kang Xie Zhang Su-Huai Wei Beijing Computational Science Research Center Beijing 100193China

The growing worldwide energy needs call for developing novel materials for energy *** initio density functional theory(DFT)calculations allow the understanding and prediction of material properties at the atomic scale,thus,play an important role in energy materials *** to the fast progress of computer power and development of calculation methodologies,DFT-based calculations have greatly improved their predictive power,and are now leading to a paradigm shift towards theory-driven materials *** aim of this perspective is to introduce the advances in DFT calculations which accelerate energy materials *** first present state-of-the-art DFT methods for accurate simulation of various key properties of energy *** we show examples of how these advances lead to the discovery of new energy materials for photovoltaic,photocatalytic,thermoelectric,and battery *** challenges and future research directions in computational design of energy materials are highlighted at the end.

关键词： density functional theory materials design energy applications

Systemic lupus erythematosus with multicentric reticulohistiocytosis: A case report

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World Journal of Clinical Cases 2023年第2期11卷 456-463页

作者： ping-ping Liu Zong-Wen Shuai Li Lian kang Wang Department of Rheumatology and Immunology Arthritis Research InstituteThe First Affiliated Hospital of Anhui Medical UniversityHefei 230000Anhui ProvinceChina

BACKGROUND Multicentric reticulohistiocytosis(MRH)/systemic lupus erythematosus(SLE) overlap syndrome is an uncommon disease in the clinic and is diagnosed through characteristic clinical manifestations, histopathology, and immunopathology. Here, we report the case of a 30-year-old woman with SLE who developed *** SUMMARY A 30-year-old woman with a history of polyarthritis for the past 12 years had multiple skin nodules on her body for 10 years, including the sacrococcygeal area, dorsum of the hands, interphalangeal joint of the feet and sternoclavicular joint. The histopathology of a biopsy of the distal interphalangeal joint of the hands revealed granulomatous inflammation, fibrous hyperplasia with ground-glass degeneration, inflammatory cell exudation and focal necrosis. The immunohistochemical stains showed positive staining for CD68 and negative staining for S100 and acid-fast staining. The patient was diagnosed with SLE with MRH. Her symptoms were improved after a combined treatment of prednisone, hydroxychloroquine and *** MRH/SLE overlap syndrome is difficult to diagnose and treat. Cyclophosphamide may be an alternative choice for the treatment of MRH.

关键词： Multicentric reticulohistiocytosis Systemic lupus erythematosus Cyclophosphamide Systemic disorder Case report

Influence of the mechanical properties of materials on the ultimate pressure-bearing capability of a pressure-preserving controller

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Petroleum Science 2024年第5期21卷 3558-3574页

作者： Xiao-jun Shi He-ping Xie Cong Li Gui-kang Liu Zi-Jie Wei Tian-Yu Wang Ju Li Qiu-Yue Li State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065SichuanChina Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen518060GuangdongChina College of Mechanical Engineering Sichuan UniversityChengdu610065SichuanChina Jinshi Drilltech Co.Ltd. Tangshan063004HebeiChina

The pressure-preserving controller is the core part of deep in-situ pressure-preserving coring(IPP-Coring) system, and its pressure-preserving capability is the key to IPP-Coring technology. To achieve a good understanding of the influence of mechanical properties of materials on the ultimate pressure-bearing capability(UPB-Capability) of the pressure-preserving controller, the IPP-Coring experimental platform was developed to test the UPB-Capability of pressure-preserving controllers of four different materials. The experimental results show that the UPB-Capability of pressure-preserving controllers with different material varies greatly. A numerical model of the pressure-preserving controller was developed to study the influences of mechanical parameters of materials on the UPB-Capability of the pressurepreserving controller after the accuracy of the numerical model is verified by experiments. The results indicate that the yield strength(YS) and Poisson's ratio(PR) of the material have little effect on the UPB-Capability of the pressure-preserving controller, whereas the elastic modulus(EM) of the material has a significant effect. A generalized model of the UPB-Capability of the pressure-preserving controller is developed to reveal the mechanism of the influence of material properties on the UPB-Capability of the pressure-preserving controllers. Considering these results, the future optimization direction of the pressure-preserving controller and material selection scheme in practical engineering applications of the pressure-preserving controller are suggested.

关键词： In-situ pressure-preserving coring Pressure-preserving controller Material properties Ultimate pressure-bearing capability