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Experimental investigation on the spread of aqueous foam over ethanol surface

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Chinese Journal of Chemical Engineering 2020年第11期28卷 2946-2954页

作者： Xiaoyang Yu Fan li Xuyang Miao Ning Jiang Ruowen Zong Shouxiang Lu changhai li state Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026China

The presence of ethanol has an adverse effect on foam spreading,and ethanol fire is difficult to extinguish with aqueous fire-fighting ***,it is necessary to explore the foam formulation suitable for ethanol fuels and study the spreading behavior of foam over ethanol *** the current work,stable foams based on hydrocarbon surfactant(SDS),fluorocarbon surfactant(FC1157),and polymers(XG)were prepared by using the compressed-air foam *** spreading behaviors of foam on polar ethanol and non-polar heptane surface were observed and ***,the effects of stabilizer concentrations,foam flow rates and expansion ratios on foam spreading performance were investigated,*** results indicate that aqueous SDS foam can spread on the heptane layer continuously,but it is difficult to cover the ethanol *** addition of XG and FC1157 can synergistically improve the spreading performance of aqueous foam over *** on stabilizer concentrations,there are remarkable differences in foam spreading ***,different foam application parameters including expansion ratios and foam flow rates significantly affect the foam spreading rate,despite the same foam *** research methods and results guide the optimal design of foam formulations as well as the practical application of aqueous foam for ethanol fire extinguishment.

关键词： Aqueous foam Ethanol Spreading behavior Fluorocarbon surfactant Xanthan gum polymer

Numerical modeling of fracture propagation of supercritical CO_(2)compound fracturing

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2607-2628页

作者： Hao Chen Yong Kang Wanchun Jin changhai li Can Cai School of Mechanical Engineering Southwest Petroleum UniversityChengdu610500China Laboratory of High-pressure Jet Theory and Application Technology Southwest Petroleum UniversityChengdu610500China Hubei Key Laboratory of Waterjet Theory and New Technology Wuhan UniversityWuhan430072China Sinopec International Petroleum Exploration and Production Corporation Beijing 100029China

The exploitation of shale gas is promising due to depletion of the conventional energy and intensification of the greenhouse *** this paper,we proposed a heat-fluid-solid coupling damage model of supercritical CO_(2)(SC-CO_(2))compound fracturing which is expected to be an efficient and environmentally friendly way to develop shale *** coupling model is solved by the finite element method,and the results are in good agreement with the analytical solutions and fracturing *** on this model,the fracture propagation characteristics at the two stages of compound fracturing are studied and the influence of pressurization rate,in situ stress,bedding angle,and other factors are *** results show that at the SC-CO_(2)fracturing stage,a lower pressurization rate is conducive to formation of the branches around main fractures,while a higher pressurization rate inhibits formation of the branches around main fractures and promotes formation of the main *** bedding and in situ stress play a dominant role in the fracture *** the in situ stress ratio(sx/sy)is 1,the presence of bedding can reduce the initiation pressure and failure ***,it will cause the fracture to propagate along the bedding direction,reducing the fracture *** rocks without bedding,hydraulic fracturing has the lengthening and widening effects for SC-CO_(2)induced *** shale,fractures induced at the hydraulic fracturing stage are more likely to be dominated by in situ stresses and have a shorter reorientation ***,fracture branches propagating along the maximum principal stress direction may be generated around the main fractures induced by SC-CO_(2)at the hydraulic fracturing *** the branches converge with the main fractures,fracture zones are easily formed,and thus the fracture complexity and damage area can be significantly *** results are instructive for the design and application of SC-CO_(2

关键词： Compound fracturing Fracture propagation Finite element method Damage evolution

Carbon dots anchored NiAl-LDH@In_(2)O_(3) hierarchical nanotubes for promoting selective CO_(2) photoreduction into CH_(4)

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Chinese Chemical Letters 2024年第6期35卷 404-408页

作者： Xiuzheng Deng changhai liu Xiaotong Yan Jingshan Fan Qian liang Zhongyu li Advanced Catalysis and Green Manufacturing Collaborative Innovation Center CNPC-CZU Innovation AllianceSchool of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China School of Materials Science&Engineering Changzhou UniversityChangzhou 213164China

The efficient conversion of CO_(2) into hydrocarbon fuels(CH_(4))with high selectivity is considered as a great challenge in photocatalysis owing to the multiple-electron transfer pathway and competitive H_(2) ***,we developed carbon dots(CDs)-modulated S-scheme heterojunction of CDs/NiAl-LDH@In_(2)O_(3)(C-DH@IN)through a facile in-situ hydrothermal *** to the multi-shell nanotube structure,the C-DH@IN shows an enhanced CH_(4) evolution rate of 10.67μmol h^(-1)g^(-1)and higher selectivity of CH_(4)(85.70%)compared with In_(2)O_(3) and Ni Al-LDH@In_(2)O_(3) binary catalyst in the pure water without sacrificial *** spin resonance(ESR)and in situ Fourier transform infrared spectra verify that the constructed S-scheme heterojunction can possess the strong redox capability and the HCOOand CH_(3)O-as critical intermediates play an important role in selective CO_(2) reduction to generate CH_(4).Furthermore,CDs with superior photoabsorption can boost the electron transfer and absorb H^(+),thus improving the integration of H^(+)and CO_(2) ***,this work emphasizes a facile strategy to achieve efficient CO_(2)-to-CH_(4) conversion based on construction of CDs-based heterojunction catalysts.

关键词： Carbon dots In_(2)O_(3) Layered double hydroxides Photocatalytic CO_(2) reduction S-scheme

Effect of trigger system on experimental dispersion characteristics of active surface wave testing

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 311-318页

作者： lin Shibin Jeramy C.Ashlock Zhu liming Qin Zexiang li Bo Zhu Xingji Zhai changhai state Key Laboratory of Precision Blasting Jianghan UniversityWuhan 430056China Hubei Key Laboratory of Blasting Engineering Jianghan UniversityWuhan 430056China Department of Civil Construction&Environmental EngineeringIowa State UniversityAmesIA 50010USA Wuhan Airport Road Development Co. Ltd.Wuhan 430065China School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen 518055China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of TechnologyHarbin 150090China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disaster of the Ministry of Industry and Information Technology Harbin Institute of TechnologyHarbin 150090China

A trigger system is typically employed in active seismic testing to trigger and synchronize multichannel surface wave data *** effect of the trigger system on the dispersion image of surface waves is empirically known to be negligible,however,theoretical explanation regarding the effect of the trigger system is *** study systematically examines the theory for surface wave dispersion analysis and proves that the effect of the trigger system on a dispersion image is negligible via a solid theoretical ***,based on the new theoretical explanation,an alternative method that uses only the relative phase difference between sensors to extract dispersion characteristics with better conceptual clarity is *** active surface wave testing cases are considered to validate the theory and *** results indicate that(1)an accurate trigger system is not necessary for surface wave data acquisition,and(2)it is unnecessary to assume that the impact point is the generation point of the surface waves for the experimental dispersion analysis.

关键词： site investigation surface waves data acquisition dispersion

Overexpression of auxin/indole-3-acetic acid gene MdIAA24 enhances Glomerella leaf spot resistance in apple(Malus domestica)

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Horticultural Plant Journal 2024年第1期10卷 15-24页

作者： Qian Wang Dong Huang Wenyan Tu Fengwang Ma changhai liu state Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple College of HorticultureNorthwest A&F UniversityYanglingShaanxi 712100China

Auxin is throughout the entire life process of plants and is involved in the crosstalk with other hormones,yet its role in apple disease resistance remains *** this study,we investigated the function of auxin/indole-3-acetic acid(IAA)gene Md IAA24 overexpression in enhancing apple resistance to Glomerella leaf spot(GLS)caused by Colletotrichum fructicola(Cf).Analysis revealed that,upon Cf infection,35S::Md IAA24 plants exhibited enhanced superoxide dismutase(SOD)and peroxidase(POD)activity,as well as a greater amount of glutathione(reduced form)and ascorbic acid accumulation,resulting in less H_(2)O_(2)and superoxide anion(O_(2)^(-))in apple ***,35S::Md IAA24 plants produced more protocatechuic acid,proanthocyanidins B1,proanthocyanidins B2 and chlorogenic acid when infected with *** Cf infection,35S::Md IAA24 plants presented lower levels of IAA and jasmonic acid(JA),but higher levels of salicylic acid(SA),along with the expression of related *** overexpression of Md IAA24 was observed to enhance the activity of chitinase andβ-1,3-glucanase in Cfinfected *** results indicated the ability of Md IAA24 to regulate the crosstalk between IAA,JA and SA,and to improve reactive oxygen species(ROS)scavenging and defense-related enzymes *** jointly contributed to GLS resistance in apple.

关键词： Apple MdIAA24 Glomerella leaf spot(GLS) Antioxidant capacity Auxin Salicylic acid Jasmonic acid

Study on the pattern of train arrival headway time in high-speed railway

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Railway Sciences 2024年第3期3卷 344-366页

作者： changhai Tian Shoushuai Zhang Railway Science and Technology Research and Development Center China Academy of Railway Sciences Corporation LimitedBeijingChina School of transportation and logistics Southwest Jiaotong UniversityChengduChina

Purpose-The design goal for the tracking interval of high-speed railway trains in China is 3 min,but it is difficult to achieve,and it is widely believed that it is mainly limited by the tracking interval of train *** the train arrival tracking interval can be compressed,it will be beneficial for China's high-speed railway to achieve a 3-min train tracking *** goal of this article is to study how to compress the train arrival tracking ***/methodologylapproach-By simulating the process of dense train groups arriving at the station and stopping,the headway between train arrivals at the station was calculated,and the pattern of train arrival headway was obtained,changing the traditional understanding that the train arrival headway is considered the main factor limiting the headway of ***-When the running speed of trains is high,the headway between trains is short,the length of the station approach throat area is considerable and frequent train arrivals at the station,the arrival headway for the first group or several groups of trains will exceed the headway,but the subsequent sets of trains will havea headway equal to the arrival *** convergence characteristic is obtained by appropriately increasing the running ***/value-According to this pattern,there is no need to overly emphasize the impact of train arrival headway on the *** plays an important role in compressing train headway and improving high-speedrailwaycapacity.

关键词： High speed railway Train headway Train arrival headway Regular pattern Paper type Research paper

Pijx confers broad-spectrum seedling and panicle blast resistance by promoting the degradation of ATP b subunit and OsRbohC-mediated ROS burst in rice

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Molecular Plant 2024年第4期17卷 672-675页

作者： Ning Xiao Yunyu Wu Xiaoxiang Zhang Zeyun Hao Zichun Chen Zefeng Yang Yue Cai Ruyi Wang ling Yu Zhiping Wang Yue Lu Wei Shi Cunhong Pan Yuhong li changhai Zhou Jianju liu Niansheng Huang Guangqing liu Hongjuan Ji Shuhao Zhu Shuai Fang Yuese Ning Aihong li 不详

(Molecular Plant 16,1832-1846,November 62023)The originally published version of this manuscript contained several small mistakes in the labels and legends of main and supplemental figures,along with a few small mistakes in the main text,that have now been ***,in Figure 6G,the label“NILGY31^(Pijx)”has been corrected to“NIL^(Pijx)”,and in the legend of Figure 6H,“PPL^(Pijx Piz-t)”and“PPL^(Pijx Pigm)”have been corrected to“NIL^(Piz-t Pijx)”and“PPL^(Pigm Pijx).”In Figure S8A。

关键词： seedling Figure panicle

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童享德育:早期道德教育优化的一种可能路径

教育科学研究 2024年第5期 82-88页

作者：刘长海李健华中科技大学教育科学研究院 430074

童享德育是对“彰显儿童享用的早期道德教育”的简称。童享德育主张充分发掘德育过程中的儿童享用元素,使早期儿童的道德学习过程成为具有个体享用价值的生活经验持续展开并不断改组改造的过程,依托具有个体享用价值的生活经验引导儿童... 详细信息

童享德育是对“彰显儿童享用的早期道德教育”的简称。童享德育主张充分发掘德育过程中的儿童享用元素,使早期儿童的道德学习过程成为具有个体享用价值的生活经验持续展开并不断改组改造的过程,依托具有个体享用价值的生活经验引导儿童形成社会发展所需要的思想观念、行为习惯和道德品质。德育个体享用功能论、柯尔伯格道德发展阶段理论、杜威经验论和儿童学习的游戏性特征为彰显儿童享用的早期道德教育提供了坚实的理论基础。教育者角度的环境创设、指引辅助、欣赏性评价和儿童角度的进入现场、自主行动、接受欣赏是童享德育的六个要素。在童享德育中,儿童扮演道德学习主体角色,教育者担当言传身教者、情境创设者、行动欣赏者。童享德育应体现儿童享用与严格管教的有机结合,警惕欣赏性评价的泛化与错位,做好行为强化与理性引导的相辅相成。

关键词：童享德育早期道德教育个体享用功能

新课标中核心素养对“双基”“三维目标”的继承与超越

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湖南师范大学教育科学学报 2024年第3期23卷 99-105,122页

作者：刘长海李海龙华中科技大学教育科学研究院湖北武汉430074

继承与超越是把握核心素养与“双基”“三维目标”关系的两个关键词。素养导向的新课标承认知识在教育中的基础性地位,各学科着重培育的核心素养普遍以中国学生发展核心素养为统率,以各学科知识和技能为基础。“三维目标”在拓展教育目... 详细信息

继承与超越是把握核心素养与“双基”“三维目标”关系的两个关键词。素养导向的新课标承认知识在教育中的基础性地位,各学科着重培育的核心素养普遍以中国学生发展核心素养为统率,以各学科知识和技能为基础。“三维目标”在拓展教育目标的全面性等方面超越“双基”,核心素养在将知识、技能、方法、情感等课程教学目标看作有机整体等方面进一步超越“双基”和“三维目标”,核心素养语境中的知识观和技能观在强调基于真实情境的应用与生成等方面较以往有了很大进步。聚焦核心素养,新时代课程教学改革应该在继承基础上超越,构建兼容“双基”与“三维目标”的核心素养结构模型,直观呈现三者的内在统一关系;合理定位聚焦核心素养的单元和课时教学目标,抓准教学设计的“牛鼻子”;基于多种教学方式的相辅相成培育核心素养,丰富课堂教学组织形式。

关键词：核心素养 “双基” “三维目标” 新课标