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Cast-rolling force model of multi-roll solid–liquid cast-rolling bonding process for fabricating metal cladding materials

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Chinese Journal of Aeronautics 2023年第9期36卷 346-368页

作者： ce JI Huagui HUANG College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research center of Advanced Metal Composites Forming Technology and Equipment of Ministry of Education Taiyuan University of TechnologyTaiyuan 030024China National Key Laboratory of Metal Forming Technology and Heavy Equipment Taiyuan University of TechnologyTaiyuan 030024China College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China National Engineering Research center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao 066004China

Based on twin-roll casting technology and multi-roll groove rolling technology,a Multi-Roll Solid-Liquid Cast-Rolling Bonding(MRSLCRB)process was proposed to fabricate Cu/steel cladding bars,which processes the advantages of short flow and ***,it is a typical 3-D thermal-fluid-mechanics coupled problem,and determining cast-rolling force is difficult during the equipment ***,the geometrical evolution of the cast-rolling area was studied,laying the foundation to establish contact boundary equations and analyze mechanical schematics and metal ***,a 3-D steady-state thermal-fluid coupled simulation model,including casting roll,substrate bar,and cladding metal,was *** Kissing Point(KP)height,average outlet temperature,and process window were predicted,and simulation results of the three-roll layout indicate that the KP distribution along the circumferential direction can be considered ***,the engineering cast-rolling force model was derived based on the differential element method and plane deformation *** accuracy was verified by the 3-D finite element model,and the influences of process layouts and technological parameters on the castrolling force were *** the indirect multi-field coupled analysis method,the temperature–pressure evolution and reasonable process window can be predicted,which provides a significant basis for guiding equipment design and improving product quality.

关键词： Cast-rolling force Kissing point Multi-field coupled Numerical simulation Solid-liquid cast-rolling bonding

Optimum Super-simple Mixed Covering Arrays of Type a^1b^k-1

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Acta Mathematica Sinica,English Series 2017年第1期33卷 153-164页

作者： ce SHI School of Mathematics and Information Science Shanghai Lixin University of Commerce Shanghai 201620 Po R. China

A mixed covering array （MCA） of type （v1,v2,..., vk）, denoted by MCAλ（N; t, k, （v1,v2,...,Vk））, is an N × k array with entries in the i-th column from a set Vi of vi symbols and has the property that each N×t sub-array covers all the t-tuples at least A times, where 1≤i ≤ k. An MCAλ（N; t, k, （vl,v2,... ,vk）） is said to be super-simple, if each of its N x （t ＋ 1） sub-arrays con- tains each （t＋1）-tuple at most once. Recently, it was proved by Tang, Yin and the author that an optimum super-simple MCA of type （a, b, b,..., b） is equivalent to a mixed detecting array （DTA） of type （a, b, b,..., b） with optimum size. Such DTAs can be used to generate test suites to identify and determine the interaction faults between the factors in a component-based system. In this paper, some combinatorial constructions of optimum super-simple MCAs of type （a, b, b,..., b） are provided. By employing these constructions, some optimum super-simple MCAs are then obtained. In particu- lar, the spectrum across which optimum super-simple MCA2（2b2; 2, 4, （a, b, b, b））＇s exist, is completely determined, where 2 ≤ a ≤ b.

关键词： Mixed covering arrays super-simple optimum detecting arrays existence

Effects of interleukin-10 treated macrophages on bone marrow mesenchymal stem cells via signal transducer and activator of transcription 3 pathway

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World Journal of Stem cells 2024年第5期16卷 560-574页

作者： meng-Hao Lyu ce Bian Yi-Ping Dou Kang Gao Jun-Ji Xu Pan Ma Department of Periodontics School of StomatologyCapital Medical UniversityBeijing 100050China Department of Orthodontics School of StomatologyCapital Medical UniversityBeijing 100050China Department of Dental Implantology School of StomatologyCapital Medical UniversityBeijing 100050China Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction School of StomatologyCapital Medical UniversityBeijing 100050China Beijing Laboratory of Oral Health Capital Medical UniversityBeijing 100050China

BACKGROUND Alveolar bone defects caused by inflammation are an urgent issue in oral implant surgery that must be *** the various phenotypes of macrophages to enhance the inflammatory environment can significantly affect the progression of diseases and tissue engineering repair *** To assess the influence of interleukin-10(IL-10)on the osteogenic differentiation of bone marrow mesenchymal stem cells(BMSCs)following their interaction with macrophages in an inflammatory *** IL-10 modulates the differentiation of peritoneal macrophages in Wistar rats in an inflammatory *** this study,we investigated its impact on the proliferation,migration,and osteogenesis of *** expression levels of signal transducer and activator of transcription 3(STAT3)and its activated form,phos-phorylated-STAT3,were examined in IL-10-stimulated ***,a specific STAT3 signaling inhibitor was used to impede STAT3 signal activation to further investigate the role of STAT3 *** IL-10-stimulated macrophages underwent polarization to the M2 type through substitution,and these M2 macrophages actively facilitated the osteogenic differentiation of ***,STAT3 signaling plays a crucial role in the process by which IL-10 influences ***,IL-10 stimulated the activation of the STAT3 signaling pathway and reduced the macrophage inflammatory response,as evidenced by its diminished impact on the osteogenic differentiation of *** Stimulating macrophages with IL-10 proved effective in improving the inflammatory environment and promoting the osteogenic differentiation of *** IL-10/STAT3 signaling pathway has emerged as a key regulator in the macrophage-mediated control of BMSCs’osteogenic differentiation.

关键词： Macrophages Interleukin-10 Bone marrow mesenchymal stem cells Signal transducer and activator of transcription 3 Inflammatory response

A Survey and Tutorial of EEG-Based Brain Monitoring for Driver State Analysis

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IEEE/CAA Journal of Automatica Sinica 2021年第7期8卷 1222-1242页

作者： ce Zhang Azim Eskandarian Virginia Tech Mechanical Engineering Department ASIM Lab Virginia 24061-0131 USA

The driver’s cognitive and physiological states affect his/her ability to control the ***,these driver states are essential to the safety of *** design of advanced driver assistance systems(ADAS)or autonomous vehicles will depend on their ability to interact effectively with the driver.A deeper understanding of the driver state is,therefore,***(EEG)is proven to be one of the most effective methods for driver state monitoring and human error *** paper discusses EEG-based driver state detection systems and their corresponding analysis algorithms over the last three ***,the commonly used EEG system setup for driver state studies is ***,the EEG signal preprocessing,feature extraction,and classification algorithms for driver state detection are ***,EEG-based driver state monitoring research is reviewed in-depth,and its future development is *** is concluded that the current EEGbased driver state monitoring algorithms are promising for safety ***,many improvements are still required in EEG artifact reduction,real-time processing,and between-subject classification accuracy.

关键词： Advanced driver assistance systems(ADAS) data analysis electroencephalography(EEG) intelligent vehicles machine learning algorithms neural network.

国产与进口羟丙甲纤维素用作缓释骨架材料相关特性的比较研究

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药物评价研究 2016年第2期39卷 237-241页

作者：黄紫玉孟策黎少志韩颜陈泊颖任晓文天津中医药大学研究生院天津300193 天津药物研究院有限公司释药技术与药代动力学国家重点实验室天津300193 天津医科大学研究生院天津300193

目的基于凝胶材料的吸水膨胀、溶蚀及凝胶对药物扩散的阻滞等影响亲水凝胶骨架片药物释放的关键因素,对国产和进口羟丙甲纤维素进行系统的比较研究。方法采用称重法,考察不同来源羟丙甲纤维素的吸水膨胀、溶蚀等特性的异同;以盐酸二甲... 详细信息

目的基于凝胶材料的吸水膨胀、溶蚀及凝胶对药物扩散的阻滞等影响亲水凝胶骨架片药物释放的关键因素,对国产和进口羟丙甲纤维素进行系统的比较研究。方法采用称重法,考察不同来源羟丙甲纤维素的吸水膨胀、溶蚀等特性的异同;以盐酸二甲双胍、托拉塞米、布洛芬为模型药物,考察不同来源羟丙甲纤维素在不同浓度下对药物扩散所起的阻滞作用的差异。结果国产羟丙甲纤维素吸水膨胀速率大于进口羟丙甲纤维素,而溶蚀速率小于进口羟丙甲纤维素;羟丙甲纤维素溶液对药物扩散的阻滞作用与溶液中羟丙甲纤维素浓度呈正相关,在较低浓度(5 mg/m L)时,国产羟丙甲纤维素与进口羟丙甲纤维素对3种模型药物的阻滞率相当,而在中等浓度(15 mg/m L)及高浓度(25 mg/m L)时,进口羟丙甲纤维素对3种模型药物的阻滞作用均小于国产羟丙甲纤维素。结论相同型号的国产和进口羟丙甲纤维素的吸水膨胀、溶蚀及对药物扩散的阻滞等性质并不完全一致。

关键词：羟丙甲纤维素国产进口缓释骨架材料凝胶

我国职业教育产教融合政策话语聚焦与变迁研究

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黑龙江高教研究 2025年第1期43卷 155-160页

作者：宋亚峰汪萌天津大学天津300350

全面深化产教融合是新时代推动职业教育高质量发展的关键所在。为厘清我国职业教育产教融合政策话语聚焦与变迁之图景,以2000一2022年教育部及教育部职业教育与成人教育司《工作要点》为研究对象,采用文本分析法构建了我国职业教育“产... 详细信息

全面深化产教融合是新时代推动职业教育高质量发展的关键所在。为厘清我国职业教育产教融合政策话语聚焦与变迁之图景,以2000一2022年教育部及教育部职业教育与成人教育司《工作要点》为研究对象,采用文本分析法构建了我国职业教育“产教融合”政策关注的五大维度二十二要素分析框架。研究发现,2000一2022年间我国职业教育产教融合政策主要聚焦培养模式创新、办学体制改革、办学条件建设、教育教学改革、相关制度建设等五大核心议题。基于各要素频次统计分析所得出的结果,结合产教融合相关政策可知,这一时期我国产教融合政策变迁从原先教育端的“单向奔赴”,到产教系统的“双向对接”,再到当前的政行企校协同、产教深度融合。未来我国职业教育产教融合政策仍需进一步提升科学性、实效性与系统性,推进政策真正落地生根。

关键词：职业教育产教融合政策话语文本分析

Is it possible to foot reflexology for infants with sensorineural hearing loss?

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World Journal of Clinical Cases 2025年第2期13卷 1-4页

作者： Min Ai Hang-Hang Zhang Jun-Bang Feng Chuan-Ming Li Wen-Jing Wang meng-Die Hu Department of Anesthesiology Nanan District People's Hospital of ChongqingChongqing 400060China Department of Breast and Thyroid Surgery Chongqing Bishan District Maternal and Child Health Care HospitalChongqing 402760China Department of Medical Imaging Chongqing University Central HospitalChongqing 400014China

Foot reflexology is a non-invasive and safe complementary therapy that works by massaging the reflex zones of the feet and exerts systemic or whole-body regulation through meridian nerve *** therapy is commonly used in the treatment of various conditions such as autism and Parkinson's ***,there is limited reporting on the use of foot reflexology therapy for infants with sensorineural hearing loss(SNHL).Currently,there is no definitive conclusion on how foot reflexology therapy can influence *** editorial holds some guiding significance regarding this clinical *** aim is to present physiological evidence of how foot reflexology therapy can impact infants with SNHL,thereby enhancing clinician’s awareness of foot reflexology in treating infants with SNHL.

关键词： Foot reflexology Sensorineural Hearing Loss Future perspectives Limitations Neural conduction

Cobalt/nitrogen co-carved carbon nanorod for efficient Fenton-like reaction:Degradation efficacy,reaction mechanism and singlet oxygen generation

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Journal of Materials Science & Technology 2023年第6期137卷 67-78页

作者： meng Li Ke Zheng Yu-Ting Jin Zhao-Xin Zhang Ji-Liang Cheng Long-Wei Huang ce-Hui Mo Shao-Qi Zhou Guangdong Provincial Research center for Environment Pollution Control and Remediation Materials College of Life Science and TechnologyJinan UniversityGuangzhou 510632China College of Environment and Energy Guangzhou Higher Education Mega CentreSouth China University of TechnologyGuangzhou 510006China Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina School of Civil Engineering and Transportation South China University of TechnologyGuangzhou 510640China Thrust of Sustainable Energy&Environment The Hong Kong University of Science and TechnologyGuangzhou 511458China College of Resources and Environmental Engineering Guizhou UniversityGuiyang 550025China

The Fenton-like process shows promising potential to generate reactive oxygen species for the reme-diation of increasingly environmental ***,the slow development of high-activity cata-lysts with strong stability and low leaching of metal ions has greatly inhibited scale-up application of this ***,cobalt(Co)/nitrogen(N)atom co-curved carbon nanorod(CoNC)containing highly uniform CoN_(x)active sites is developed as a Fenton-like catalyst for the effective catalytic oxidation of various organics via peroxymonosulfate(PMS)activation with high *** confirmed by the exper-imental results,singlet oxygen(^(1)O_(2))is the dominant active species for the degradation of the organ-ics,with a proportion of 100%.Furthermore,density functional theory calculations indicate that CoN_(2)C_(2)is the most effective ligand structure with more negative adsorption energy for PMS and the shortest length Co-O bond,while the most reasonable generation pathway for^(1)O_(2)was CoN_(2)C_(2)-PMS→CoN_(2)C_(2)-OH∗→2O∗→^(1)O_(2).Further studies demonstrate that the electron can be transferred from the highest occupied molecular orbitals of the organics to the lowest unoccupied molecular orbitals of the PMS via CoN_(2)C_(2)*** addition,the CoNC presents strong resistance to inorganic ions and natural organic matter in the Fenton-like catalysis *** presence of CoN_(2)C_(2)active centre can significantly shorten the migration distance of the^(1)O_(2)generated from PMS activation,which further enhances the Fenton-like catalytic activity in terms of mineralising various organic contaminants with high efficiency over a wide pH range.

关键词： Non-radical pathway Singlet oxygen Co/N co-carved carbon nanorod Fenton-like catalysis

Exploring the spatiotemporal heterogeneity of vegetation changes in subtropical humid karst region under CO2 fertilization

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Journal of Geographical Sciences 2025年第1期 65-87页

作者： CHEN meng ZHOU Qiuwen PENG Dawei YAN Weihong School of Geography and Environmental Science Guizhou Normal University Huanjiang Observation and Research Station for Karst Ecosystem Guangxi Key Laboratory of Karst Ecological Processes and Services Institute of Subtropical Agriculture CAS University of Chinese Academy of Sciences Faculty of Geographical Science Beijing Normal University Forestry Bureau of Shibing County

Terrestrial ecosystems heavily depend on vegetation,which responds to carbon dioxide （CO2） fertilization in hot and humid *** subtropical humid karst region is a hot and humid region;whether and to what extent CO2fertilization affects vegetation changes in such regions remains *** this study,we investigated the degree to which CO2fertilization influences vegetation changes,along with their spatial and temporal differences,in the subtropical humid karst region using time-lag effect analysis,a random forest model,and multiple regression *** showed that CO2fertilization plays an important role in vegetation changes,exhibiting clear spatial variations across different geomorphological zones,with its degree of influence ranging mainly between 11%and 25%.The highest contribution of CO2fertilization was observed in the karst basin and non-karstic region,whereas the lowest contribution was found in the karst plateau *** studies have primarily attributed vegetation changes in subtropical humid karst region to ecological engineering,leading to an overestimation of its contribution to these *** findings of this study enhance the understanding of the mechanism of vegetation changes in humid karst region and provide theoretical and practical insights for ecological and environmental protection in these regions.

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