检索结果-南通市图书馆

Influence of Mixture Gas Conditions on the Laminar Combustion Characteristics of Natural Gas

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第3期33卷 1231-1241页

作者： LOU Diming ZHU Kan ZHANG Yunhua REN Yedi TAN Piqiang FANG Liang FAN Lanlan school of Automotive studies Tongji UniversityShanghai201804China Ji’nan Power Co.Ltd Sinotruk GroupJi’nan250200China

Natural gas is a promising alternative fuel for the internal combustion engine,and natural gas engine has become an efficient and feasible measure to deal with the energy shortage and climate *** the laminar flame characteristics are the foundation of the turbulent flame,the laminar flame characteristics of natural gas have a significant impact on the combustion status and efficiency of the engine.A visual constant volume bomb was used to study the influence of the gas components,different excess air coefficient(λ),and initial conditions on the laminar combustion characteristics of natural *** experimental results showed that when the initial pressure and temperature were 0.1 MPa and 300 K respectively,compared to propane,ethane had a remarkable influence on the equivalent-combustion laminar-combustion-speed,with an average increase of approximately 5.1%for every 2.5%increase in the ethane *** laminar combustion velocity of the natural gas under different excess air coefficients had a maximum value at aboutλ=1.0,and the Markstein length of the flame decreased with the increase of theλ.The increase in the initial pressure of the mixture resulted in a decrease in the equivalent-combustion laminar-combustion-speed of the flame,a significant decrease in the Markstein *** increase of the initial temperature of the mixture led to a rapid increase of the equivalent-combustion laminar-combustion-speed,but the effect on the flame Markstein length was not dominant.

关键词： constant volume bomb natural gas engine combustion characteristics laminar combustion velocity Markstein length

Deformation mechanism and hydrocarbon significance of Eocene organic-rich fine-grained soft sediments in the Leijia Region,Liaohe Depression

在线全文

学校读者我要写书评

暂无评论

Frontiers of Earth Science 2024年第1期18卷 83-97页

作者： Yijie WEN Jianguo ZHANG Shu TAO Chenyu CAI school of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Strategy Evaluation for Shale Gas(Ministry of Land Resources) China University of Geosciences(Beijing)Beijing 100083China school of foreign languages China University of Geosciences(Beijing)Beijing 100083China

The deformation structure of soft sediments has always been a research hotspot,which is of great significance for analyzing the tectonic and sedimentary evolution background of a basin,as well as the physical properties of *** studies have reported that a large number of soft sediment deformation structures are developed in the western part of Liaohe *** this study,through core observation and thin section identification,various types of deformation structures are identified in the core samples which are collected from the upper Es4 in the Leijia region,western sag of Liaohe depression,such as liquefied dikes,liquefied breccia,convoluted laminae,annular bedding,synsedimentary faults,vein structures,*** on the characteristics of core structure,single well profile and continuous well profile,combined with the regional background,this study clarifies that the deformation structure of soft sediments in the study area is mainly caused by seismic *** is found that the permeability and porosity of deformation layers in the study area are higher than those of the undeformation layers,which proves that the deformation structure of soft sediments has a good effect on improving the physical properties of reservoirs.

关键词： soft sediment deformation structure Liaohe depression organic-rich fine-grained soft sediments hydrocarbon significance

A Cognitive Study on Politeness Intention Processing and Its Association with Pragmatic Failure in Cross-Cultural Communication

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Applied Linguistics 2024年第3期47卷 481-497,525页

作者： Rong YAN Tengfei FENG Samad ZARE Academy of Future Education Xi’an Jiaotong-Liverpool University school of English language Literature&CultureBeijing International Studies University

Although a large number of studies have focused on various aspects of politeness,very little is known about how politeness intention is activated cognitively during verbal *** present study aims to explore the cognitive mechanism of politeness intention processing,and how it is related to pragmatic failure during cross-cultural *** 30 Chinese EFL university students who were instructed to finish a probe word judgment task with 96 virtual scenarios,the results indicate that within both mono-and cross-cultural contexts,the response time in the experimental scenarios was significantly slower than that of the filler *** suggests that politeness intention was activated while understanding the surface meaning of the conversation;however,the EFL learners could not completely avoid the negative transfer of their native politeness conventions when they were comprehending the conversational intention of the target ***,no significant differences in response time were found between the groups with high and low English pragmatic competence,illustrating that transferring the pragmatic rules and principles into cross-cultural communication skills was more cognitively ***,this study adds to the literature on politeness research and provides some implications for foreign language pragmatic instructions.

关键词： politeness intention cognitive processing pragmatic failure cross-cultural pragmatics cross-cultural communication

Application of CFD and FEA Coupling to Predict Structural Dynamic Responses of A Trimaran in Uni-and Bi-Directional Waves

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2024年第1期38卷 81-92页

作者： LIAO Xi-yu XIA Jin-song CHEN Zhan-yang TANG Qin ZHAO Nan ZHAO Wei-dong GUI Hong-bin Marine Design&Research Institute of China Shanghai 200011China Ship Structure Division China Ship Scientific Research CenterWuxi 214082China College of Ocean Engineering Harbin Institute of TechnologyWeihaiWeihai 264209China State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentDalian University of TechnologyDalian 116024China school of foreign studies Jiangnan UniversityWuxi 214122China

To predict the wave loads of a flexible trimaran in different wave fields,a one-way interaction numerical simulation method is proposed by integrating the fluid solver(Star-CCM+)and structural solver(Abaqus).Differing from the existing coupled CFD-FEA method for monohull ships in head waves,the presented method equates the mass and stiffness of the whole ship to the hull shell so that any transverse and longitudinal section stress of the hull in oblique waves can be ***,verification study and sensitivity analysis are carried out by comparing the trimaran motions using different mesh sizes and time step *** on the wave elevation of uni-and bi-directional waves is also carried *** a comprehensive analysis on the structural responses of the trimaran in different uni-directional regular wave and bi-directional cross sea conditions is carried out,***,the differences in structural response characteristics of trimaran in different wave fields are *** results show that the present method can reduce the computational burden of the two-way fluid-structure interaction simulations.

关键词： CFD-FEA fluid-structure coupling structural responses trimaran bi-directional cross sea

The Contradiction between “Soul” and “Body” in André Gide’s Pastoral Symphony

在线全文

学校读者我要写书评

暂无评论

Journal of Literature and Art studies 2024年第7期14卷 602-606页

作者： XU Chang Guangdong University of foreign studies GuangzhouChina Sorbonne University ParisFrance

André Gide is one of the most important writers in the history of French literature in the 20th *** works are highly distinctive:on the one hand,there is strong coherence and beautiful language between his works,which gives them a strong *** the other hand,his works delve deeper into the struggle between the“soul”and the“body”under the oppression of“religious concepts”,which is most evident in one of his representative works:Pastoral *** article will analyze and explore the contradiction between“soul”and“body”reflected in the work of“Pastoral Symphony”from three aspects:“modernity”,“aesthetics”,and“characters’prototypes”.

关键词： AndréGide Pastoral Symphony “soul” “body” contradiction

Development of advanced anion exchange membrane from the view of the performance of water electrolysis cell

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第3期90卷 348-369,I0009页

作者： Chao Liu Zhen Geng Xukang Wang Wendong Liu Yuwei Wang Qihan Xia Wenbo Li Liming Jin Cunman Zhang Clean Energy Automotive Engineering Center Tongji UniversityShanghai 201804China school of Automotive studies Tongji UniversityShanghai 201804China

Green hydrogen produced by water electrolysis combined with renewable energy is a promising alternative to fossil fuels due to its high energy density with zero-carbon *** water electrolysis technologies,the anion exchange membrane(AEM) water electrolysis has gained intensive attention and is considered as the next-generation emerging technology due to its potential advantages,such as the use of low-cost non-noble metal catalysts,the relatively mature stack assembly process,***,the AEM water electrolyzer is still in the early development stage of the kW-level stack,which is mainly attributed to severe performance decay caused by the core component,i.e.,***,the review comprehensively presents the recent progress of advanced AEM from the view of the performance of water electrolysis ***,fundamental principles and critical components of AEM water electrolyzers are introduced,and work conditions of AEM water electrolyzers and AEM performance improvement strategies are *** challenges and perspectives are also analyzed.

关键词： Hydrogen Water electrolysis Anion exchange membrane Electrolysis cell

Dietary cooking oils and cardiometabolic measurements in an elderly Chinese population

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2024年第6期21卷 642-650页

作者： Xin-Yu WANG Chao-Ying MIAO Xiao-Fei YE Wen-Yuan-Yue WANG Jia-Bo ZHU Yi ZHOU Yan LI Ji-Guang WANG school of Public Health Shanghai Jiao Tong University School of MedicineShanghaiChina Department of Cardiovascular Medicine Centre for Epidemiological Studies and Clinical TrialsThe Shanghai Institute of HypertensionRuijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina

OBJECTIVE To investigate three features of dietary cooking oil intake,namely,the consumption,cooking style,and composition of fatty acids in relation to several cardiometabolic measurements in an elderly Chinese *** The elderly(≥65 years)participants for this study were recruited from two community health centers in the urban area of Shanghai.A questionnaire was administered to collect information on dietary oil consumption(low,medium and high)and cooking styles(fry or stir-fry ***)and the composition of fatty acids(poly-unsaturated ***-unsaturated).The cardiometabolic measurements included anthropometry,blood pressure,fasting plasma glucose and serum *** The 1186 study participants had a mean age of 70.9±5.4 *** mean dietary oil consumption was 35.0 g/d,being low(<25 g/d),medium(25-49 g/d)and high(≥50 g/d)in 485,467 and 234 participants,*** proportion of the fry or stir-fry cooking style and oils rich in mono-unsaturated fatty acids was 30.4%and 27.4%,*** before and after adjustment for sex,age,current smoking and alcohol intake,dietary oil consumption was significantly(P≤0.02)and positively associated with the prevalence of treated hypertension and fasting plasma glucose *** similar adjustments as above and additional adjustment for dietary oil consumption,the fry or stir-fry cooking style was significantly(P≤0.048)and positively associated with body mass index,but inversely with systolic and diastolic blood pressure and serum low-density lipoprotein cholesterol,and the dietary intake of oils rich in mono-unsaturated fat acids was significantly(P≤0.02)and positively associated with diastolic blood pressure,serum triglycerides,total cholesterol and low-density lipoprotein cholesterol,and the prevalence of hypertriglyceridemia and *** This study showed that both the consumption and composition of fatty acids of the dietary oils mattered with regard to sev

关键词： cooking elderly unsaturated

Research on the Mechanism of the Impact of Educational Gamification on Middle

在线全文

学校读者我要写书评

暂无评论

Education and Teaching Research

Education and Teaching Research 2024年第3期 38-44页

作者： Zhang Lei school of foreign languages Chengdu College of Arts and SciencesChina

This study presents an in-depth examination of the impact of educational gamification on middle school students’learning motivation through a mixed-methods *** integration of quantitative survey data and qualitative interviews and observations revealed that gamification significantly enhances intrinsic motivation by increasing interest and engagement in a learning *** study also found that gamification indirectly boosts extrinsic motivation through the augmentation of social interaction and learning *** equation modeling underscored the direct and indirect effects of gamification on learning *** findings suggest that educators should integrate gamification elements into their teaching designs,focus on fulfilling students’psychological needs for autonomy,competence,and relatedness,and leverage social interactions to foster *** study’s contributions to the educational field include empirical evidence of gamification’s impact and a multidimensional perspective that strengthens the depth of understanding in the application of ***,the study acknowledges limitations such as potential biases and a non-representative sample,calling for future research to address these issues through broader and longitudinal studies.

关键词： Educational Gamification Learning Motivation Middle school Students Mixed-Methods Research Intrinsic and Extrinsic Motivation Social Interaction Technological Tools in Education Psychological Needs Teaching Design Integration

Realizing quantum imaginary time evolution in experiment

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 167-168页

作者： Xiao Yuan Center on Frontiers of Computing studies Peking UniversityBeijing 100871China school of Computer Science Peking UniversityBeijing 100871China

NISQ,or Noisy Intermediate-Scale Quantum computing,represents a pivotal and the state-of-the-art quantum technology[1].Characterized by intermediate-scale quantum devices that are beyond classical computational capabilities yet fall short of the error-correction thresholds required for fault-tolerant quantum computing,NISQ devices exhibit both promise and *** devices hold immense potential in solving certain computational problems that surpass classical capabilities,with wide applications in optimization,machine learning,and quantum chemistry.

关键词： quantum imaginary correction